• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    TURNING TOOL HOLDER AND CUTTING TOOL PILL. The present invention is related to a turning tool holder (2). The turning tool holder comprises a tool body (4), a cutting tool insert (6), and a shim (8). A refrigerant duct system extends through the turning tool holder (2), a first portion of the refrigerant duct system extends through the tool body (4) and a terminal portion of the refrigerant duct system extends through the wedge (8). The end portion of the refrigerant duct system comprises a hollow hole extending from a first surface to a second opposite surface of the shim (8). The end portion comprises a coolant outlet (12) on the second surface, the coolant outlet (12) being formed only by the shim (8). A jet of coolant from the outlet opening of the coolant medium (12) can be directed to an expected space to comprise a cutting zone of a workpiece. In addition, a cutting tool insert (6), adapted for use in a turning tool holder (2), is disclosed.
    公开号:BR102015011228B1
    申请号:R102015011228-9
    申请日:2015-05-15
    公开日:2021-02-17
    发明作者:Adam JOHANSSON；Gustav GEWERS
    申请人:Sandvik Intellectual Property Ab；
    IPC主号:
    专利说明:

    [0001] [001] The present invention is related to a turning tool holder. The present invention also relates to a cutting tool insert to be used in a turning tool holder. Background of the Invention
    [0002] [002] A turning tool holder is adapted to support a cutting tool insert. The turning tool holder, including the cutting tool insert, is used on a machine tool, such as a lathe, for machining a workpiece. Turning tool holders of the most diverse configurations and adapted for use with cutting tool inserts of different and different geometries are known. Notably, depending on the type of turning operation that is performed on a workpiece, the turning tool holder must be able to reach a relevant portion of the workpiece and the cutting tool insert must have a suitable geometry.
    [0003] [003] A cutting tool insert is usually provided with two or more cutting edges. In this way, the cutting tool insert can be placed in two or more different positions, in a specific turning tool holder, in order to expose one of the cutting edges in a condition to engage with a certain workpiece. In other words, the cutting tool insert is interchangeable for the same number of times that it comprises the cutting edges.
    [0004] [004] A cooling medium, also referred to as cooling liquid or cooling fluid, can be distributed to a cutting zone of a workpiece. The refrigerant medium is usually liquid, but a gaseous medium, such as air, can be used as a refrigerant in some cutting applications. Traditionally, for the present purpose, a lathe can be provided with a separate nozzle, adapted to be directed to a workpiece. A more modern approach is the provision of one or more nozzles for the coolant medium, integrated into a turning tool holder. Thus, the nozzle (s) can be arranged in close proximity to a cutting zone of a workpiece. The nozzles for the coolant medium can be provided in a turning tool holder, on one side of the exit surface and / or one side of the relief surface of a cutting edge, of a cutting tool insert.
    [0005] [005] U.S. Patent No. 8,454,274 discloses an interchangeable cutting insert comprising the release of a coolant, which has a radial orientation towards a corresponding cutting edge region. With reference to figures 5-7, the aforementioned document discloses a wedge arranged below the cutting insert. A coolant passage is provided on the shim and a coolant outlet is formed between the cutting insert and the shim.
    [0006] [006] In this provision cited by the state of the art, a jet of coolant coming from the coolant outlet is influenced by the shim and the cutting insert. Consequently, if a relevant cutting edge region of the cutting insert is worn out due to previous use and is then positioned to form the coolant outlet together with the shim, the coolant jet from the coolant outlet may be different, depending on the wear of the cutting insert. Summary of the Invention
    [0007] [007] It is an objective of the present invention, to provide a turning tool holder, configured to direct a controlled coolant jet that can be repeated, in the direction of an expected space to comprise a cutting zone of a workpiece, the from one side of a relief surface of a cutting edge of a cutting tool insert.
    [0008] [008] According to one aspect of the invention, the objective is achieved by means of a turning tool holder, which comprises a tool body, a cutting tool insert, a wedge and a clamping arrangement. The tool body comprises a recess, the wedge being disposed in a base portion of the recess and the cutting tool insert being releasably clamped by the clamping arrangement against the wedge. A refrigerant duct system extends through the turning tool holder, a first portion of the refrigerant duct system extends through the tool body and a terminal portion of the refrigerant duct system extends through the shim. The end portion of the refrigerant duct system comprises a hollow hole that extends from a first surface of the shim, opposing a base of the recess to an opposite second surface of the shim. The end portion comprises a refrigerant outlet opening on the second surface, the refrigerant outlet opening being formed only by the wedge. The shim and the coolant outlet opening are configured to direct a jet of coolant, from the coolant outlet opening unobstructed by the cutting tool insert, in the direction of an expected space to comprise a cutting zone of a workpiece. Work.
    [0009] [009] Since the refrigerant outlet opening is formed only by the wedge and the wedge and the refrigerant outlet opening are configured to direct a jet of refrigerant, from the refrigerant outlet opening unobstructed by the tool insert. cutting, in the direction of a space expected to comprise a cutting zone of a workpiece, the coolant jet is able to be directed in the direction of the workpiece, from one side of the relief surface of a cutting edge of the cutting insert, the coolant jet being guided only by the wedge, in the direction of the space expected to comprise a cutting zone of a workpiece. The cutting insert and any wear that occurs on the cutting insert will not affect the coolant jet. As a result, the aforementioned objective is achieved.
    [0010] [010] In addition, when the refrigerant is provided for a cutting area on the side of the relief surface of a cutting tool insert, the refrigerant is directed towards the cutting insert from an area of the support element which is prone to damage, in case, for example, using too high a feed speed of the turning tool holder, which will cause the cutting insert to break and thus expose the area tangentially below the insert cutting tool to damage. This can cause the destruction or alteration of a terminal portion of a coolant passage under the cutting tool insert. Therefore, by providing the end portion of the refrigerant passage in the wedge and in the refrigerant outlet opening formed only by the wedge, it allows the end portion to be interchangeable with the wedge. In this way, damage caused to the terminal portion of the refrigerant passage can easily be overcome by changing a damaged shim.
    [0011] [011] The turning tool holder may comprise a single shank for attaching the turning tool holder to a particular lathe. Alternatively, the turning tool holder may comprise a more elaborate connection system for attaching the turning tool holder to a particular lathe. An example of such a system is the Coromant Capto® tool holder system. The term "hollow hole" means a channel that is enclosed by the bounding surfaces on all sides, except for an inlet and an outlet of the channel.
    [0012] [012] According to some modalities, a lateral portion of the shim may extend beyond the body of the cutting tool insert. The refrigerant outlet opening can be provided on the second surface of the side portion. In this way, the shim and the coolant outlet opening can be configured to direct a jet of coolant, from the coolant outlet opening unobstructed by the cutting tool insert, in the direction of an expected space to understand a cutting zone. of a workpiece. Suitably, the entire refrigerant outlet opening is arranged on the side.
    [0013] [013] According to some modalities, the hollow hole can have a uniform diameter, substantially along its entire length through the wedge. In this way, the drilled hole can be easily fabricated by means of electrical discharge machining (EDM). Since the wedge is usually made from ceramic material, nitrides and / or carbides, the EDM process can be the most convenient way of producing a precise hole drilled in the wedge. However, the hollow hole can alternatively be drilled, for example, before sintering the wedge, or it is the wedge that is manufactured from a different material, such as steel, that can be hardened after being drilled. These modalities include hollow holes with inlets and / or outlets of other shapes, unlike the uniform diameter of the rest of the hollow hole, for example, a chamfer in the shim, inlet and / or outlet of the hollow hole can be provided.
    [0014] [014] According to some modalities, the hollow hole may comprise at least one conical portion. / thus, a chamfer can be provided on the shim, at the entrance and / or exit of the hollowed hole. This chamfer can provide a controlled shape of the hole inlet and / or outlet. At the outlet, the chamfer can form a coolant jet, ejected from the coolant outlet opening. Alternatively, or in addition, the hollow hole can have two different diameters, with a tapered transition between the two diameters.
    [0015] [015] According to some modalities, a section of the first portion of the refrigerant duct system, adjacent to the terminal portion, may be formed by the shim and a depression in the tool body, in the base portion of the recess. In this way, it can be ensured that the refrigerant can be directed from the tool body to the terminal portion of the refrigerant duct system. In addition, when the depression is formed over an area larger than the diameter of the hollow hole in the end portion, the shims with hollow hole entries located differently on the first side of the shim can be used with the same tool body. Therefore, the refrigerant directing characteristics of the terminal portion, such as the direction of the refrigerant jet, the diameter of the refrigerant jet and the convergence of the refrigerant jet can be adapted, simply by changing the shim.
    [0016] [016] According to some embodiments, the first portion of the refrigerant duct system may comprise a straight duct portion and a refrigerant distribution passage in the tool body. The straight duct portion can extend from the depression to the coolant dispensing passage. In this way, a conduit connection between the depression and the coolant dispensing passage can be easily manufactured by drilling in the tool body. The refrigerant dispensing passage may be a portion of the refrigerant duct system that is configured to distribute refrigerant to more than one refrigerant outlet opening.
    [0017] [017] According to some modalities, the depression may comprise a surface that extends substantially perpendicular to the portion of the straight duct. In this way, a surface for a drill bit can be provided for engagement at a right angle. Thus, it can be guaranteed that the straight duct portion can be drilled in a desired direction in the tool body. Alternatively, the straight duct portion can be formed by the EDM process on the tool body. Also, through the EDM process, the surface which extends substantially perpendicular to the straight conduit portion can be advantageously formed.
    [0018] [018] According to some modalities, the straight duct portion may extend at an acute angle to a plane that extends along the base portion of the recess and the shim. In this way, the straight duct portion can connect with the coolant dispensing passage, which extends to a different portion of the tool body, in relation to the depression and the straight duct portion. In addition, the recess and shim are usually arranged on a portion of the tool body, the portion of which is comparatively narrower than the rest of the tool body, to ensure that the cutting tool insert can get very close to a given work piece. Because the straight duct portion extends at an acute angle, the straight duct portion may be able to reach the coolant distribution passage, which extends to a different portion of the tool body. Thus, this can only be achieved by the straight duct portion.
    [0019] [019] According to some modalities, the terminal portion has a first diameter and the straight conduit portion may have a second diameter. The second diameter can be equal to or greater than the first diameter. In this way, it can be guaranteed that the straight duct portion does not cause an unnecessarily large pressure drop in the refrigerant, compared to the pressure drop caused in the terminal portion.
    [0020] [020] According to some embodiments, the refrigerant dispensing passage may form an inlet portion of the refrigerant duct system, comprising a connection arrangement for connecting the refrigerant duct system with a refrigerant supply system of one certain lathe. In this way, the refrigerant from the lathe can be distributed through the refrigerant distribution passage to the end portion of the refrigerant duct system in the shim. The connection arrangement can comprise, for example, a quick coupling or a screw connection.
    [0021] [021] According to some modalities, the refrigerant distribution passage may extend in a different direction, with respect to the straight duct portion.
    [0022] [022] According to some modalities, the wedge may comprise an opening to attach the wedge to the tool body. The opening can be separated from the hollow hole. In this way, the flow of refrigerant in the hollow hole cannot be disturbed by any fastening arrangement associated with the opening. In addition, in this way, the opening can be located in a position of the shim best suited to attach it to the tool body, for example, in a central portion, while the hollow hole can be positioned to direct a jet of coolant from the refrigerant outlet opening unobstructed by the cutting tool insert in the direction of an expected space to comprise a cutting zone of a workpiece. Suitably, the opening is a hollow opening that extends through the wedge.
    [0023] [023] According to some modalities, the cutting tool insert can be an eight-time interchangeable cutting tool insert.
    [0024] [024] According to some embodiments, the cutting tool insert may comprise a insert body, the insert body may comprise two parallel opposite side surfaces, and four mutually substantially identical side surfaces, extending between the side surfaces. The cutting tool insert can comprise four separate cutting edges, arranged symmetrically on each side surface, where each separate cutting edge can comprise a first cutting edge portion that extends along a flap portion of a surface lateral, and a second cutting edge portion extending along a flap portion of a lateral surface, in a direction from the lateral surface to an imaginary intermediate plane, between and in parallel with the lateral surfaces. The first cutting edge portion can be interconnected with the second cutting edge portion through a corner edge portion. When viewed in a side view along a central axis, the central axis extends perpendicular to the side surfaces, the cutting tool insert being able to comprise a corner point on each corner edge portion, four of the corner points corner being symmetrically arranged on each of the lateral surfaces, with equal extensions of diagonals between the corner points. A first angle between a first imaginary line that extends from a first corner point to a second corner point of two adjacent corner points on a side surface, and a second imaginary line that extends over a portion of tip of the first cutting edge portion at the first corner point, can be arranged within a range of 15-25 °. In this way, the cutting tool insert can be configured to rest against the shim, without interference with the coolant outlet opening in the shim. That is, within the said strip, on one side of the relief surface of the cutting tool insert, the cutting tool insert is lowered sufficiently, so as not to interfere with the coolant outlet opening on the shim, at the same time. time that it maintains a sufficiently strong support of the connecting cutting edge.
    [0025] [025] According to some modalities, when viewed in a lateral view along the central axis, a second angle of approximately 17 ° can be formed between a third imaginary line, which extends from the central axis to one of the points of corner on a first lateral surface of the lateral surfaces, and a fourth imaginary line, which extends from the central axis to a corner point adjacent to the corner points on a second lateral surface of the lateral surfaces. In this way, a spacing can be provided behind a second portion of the cutting edge, of a connecting cutting edge, that is, the spacing can be provided along a line extending along the second portion of the cutting edge. cut. In addition, when viewed from a cutting edge of one of the side surfaces that connect with a workpiece, two adjacent cutting edges and their corresponding corner portions of the cutting tool insert on the opposite side surface can be arranged substantially within the same distance from the workpiece, so that none of them interfere with said workpiece.
    [0026] [026] In accordance with an additional aspect of the present invention, a cutting tool insert adapted for use in a turning tool holder is provided, according to any aspect or embodiment described herein, in which the cutting tool insert is provided. it is an eight-interchangeable insert, comprising a cutting body, the cutting body comprising two parallel opposite side surfaces, and four mutually substantially identical side surfaces, which extend between the side surfaces. The cutting tool insert further comprises four separate cutting edges, arranged symmetrically on each side surface, where each separate cutting edge comprises a first portion of the cutting edge that extends along a flap portion of a side surface , and a second cutting edge portion extending along a flap portion of a lateral surface, in a direction from the lateral surface to an imaginary intermediate plane, disposed between and in parallel with the lateral surfaces, the first portion cutting edge being interconnected with the second cutting edge portion through a corner edge portion. When viewed in a side view along a central axis, where the central axis extends perpendicular to the side surfaces, the cutting tool insert comprises a corner point on each corner edge portion, four of the corner points corner being symmetrically arranged on each of the lateral surfaces, with equal extensions of diagonals between the corner points, and in which a first angle between an imaginary first line that extends from a first corner point to a second corner point of two adjacent corner points on a side surface, and a second imaginary line that extends along a tip portion of the first cutting edge portion at the first corner point, can be arranged within a range of 15-25 ° .
    [0027] [027] In this way, the cutting tool insert is configured to rest against a turning tool holder shim without interference with the coolant outlet opening in the shim. Consequently, a coolant outlet opening formed only by the shim can direct a jet of coolant from the coolant outlet opening unobstructed by the cutting tool insert in the direction of an expected space to comprise a cutting zone of a workpiece. .
    [0028] [028] According to some modalities, when viewed in lateral view along a central axis, a second angle of approximately 17 ° can be formed between a third imaginary line that extends from the central axis to one of the corner points on a first lateral surface of the lateral surfaces, and a fourth imaginary line, which extends from the central axis to a corner point adjacent to the corner points on a second lateral surface of the lateral surfaces.
    [0029] [029] Additional features and advantages of the present invention will become apparent upon observation of the appended claims and the following detailed description. Brief Description of Drawings
    [0030] - a figura 1 ilustra um suporte de ferramenta de torneamento de acordo com as modalidades apresentadas; - a figura 2 ilustra o suporte de ferramenta de torneamento mostrado na figura 1, em uma vista explodida; - as figuras 3a e 3b ilustram seções transversais dos calços, de acordo com as modalidades apresentadas; - a figura 4 ilustra uma vista do suporte de ferramenta de torneamento mostrado nas figuras 1 e 2; - a figura 5 ilustra um suporte de ferramenta de torneamento, de acordo com as modalidades apresentadas; e - as figuras 6a-6c ilustram uma pastilha de ferramenta de corte, de acordo com as modalidades apresentadas. [030] Several aspects of the invention, including its particular characteristics and advantages, will be easily understood in view of the discussion of exemplary modalities presented in the following detailed description and in the accompanying drawings, in which: figure 1 shows a turning tool holder according to the presented modalities; figure 2 shows the turning tool holder shown in figure 1, in an exploded view; - figures 3a and 3b illustrate cross sections of the shims, according to the modalities presented; figure 4 shows a view of the turning tool holder shown in figures 1 and 2; figure 5 shows a turning tool holder, according to the presented modalities; and figures 6a-6c illustrate a cutting tool insert, according to the modalities shown.
    [0031] [031] Certain aspects of the present invention will now be described in more detail. It should be noted that equal numerical references correspond to the same elements presented. Functions or constructs already known will not necessarily be described in detail, for the sake of presenting a more concise and / or more clear text.
    [0032] [032] Figure 1 illustrates a turning tool holder (2), according to the presented modalities. The turning tool holder (2) comprises a tool body (4), a cutting tool insert (6), a shim (8) and a clamping arrangement (10). The cutting tool insert (6) is an eight-interchangeable insert, that is, it comprises eight separate cutting edges (14, 14 '), which one at a time can be positioned to extend out of the tool holder turning tool (2), to connect with a specific workpiece. A coolant duct system extends through the turning tool holder (2). A refrigerant outlet opening (12) of the refrigerant duct system is provided in the shim (8). From the coolant outlet opening (12), a jet of coolant can be directed from one side of a relief surface of a connecting cutting edge (14 '), of the cutting tool insert (6), in the direction of an expected space to comprise a cutting zone of a workpiece. In other words, a jet of coolant can be directed towards the connecting cutting edge (14 '). Preferably, the direction of the coolant jet deviates less than 25 ° from normal to the base surface of the recess (18). Optionally, the turning tool holder can comprise one or more additional refrigerant outlet openings (16), as shown in figure 1.
    [0033] [033] Figure 2 illustrates the turning tool holder (2) shown in figure 1, in an exploded view. The tool body (4) comprises a recess (18). The wedge (8) is arranged in a base portion of the recess (18). The cutting tool insert is releasably clamped by the clamping arrangement (10) against the shim (8), as shown in figure 1. A first portion of the coolant duct system extends through the tool body (4) , and a terminal portion of the refrigerant duct system extends through the shim (8). The end portion of the refrigerant duct system comprises a hollow hole that extends from a first surface (20) of the shim (8) to a second opposite surface (22) of the shim (8). The first surface (20) of the shim (8) is arranged opposite to a base of the recess (18) and the second surface (22) of the shim (8) is arranged to at least partially oppose the cutting tool insert (6). The end portion comprises the refrigerant outlet opening (12) on the second surface (22). The refrigerant outlet opening (12) is formed only by the shim (8). The shim (8) and the coolant outlet opening (12) are configured to direct a jet of coolant, from the coolant outlet opening (12) unobstructed by the cutting tool insert (6), in the direction of a expected space to understand a cutting zone of a workpiece. This can impose the position of the refrigerant outlet opening (12) on the shim (8), the direction of the hollow hole and the shape of the shim (8).
    [0034] [034] As shown in figure 1, a lateral portion (24) of the shim (8) extends beyond a cutting tool insert body (6). The refrigerant outlet opening (12) is provided on the second surface (22), on the side (24).
    [0035] [035] Figures 3a and 3b illustrate cross sections of the shims (8), according to the presented modalities, to be used in a turning tool holder according to the present invention. A terminal portion of a refrigerant duct system comprises a hollow hole (26), extending from a first surface (20) of the shim (8), to a second opposite surface (22) of the shim (8). The first surface (20) is a base surface of the shim. When the shim (8) is mounted on the tool body (4), at least a portion of the first surface (20) comes into contact with a base portion of the recess. The second surface (22) is a top surface of the shim. The cutting tool insert (6) when pressed contacts a portion of the second surface (22).
    [0036] [036] In the modalities illustrated in figure 3a, the hollow hole (26) has a substantially uniform diameter, along its entire length, through the wedge (8). The hollow hole (26) comprises two conical portions (28, 28 '), providing a chamfer in the shim (8), in the coolant inlet and outlet opening (12) of the hollow hole (26). In the embodiments illustrated in figure 3b, the hollow hole (26) comprises a tapered portion (28 "), providing a tapered transition between two different diameter portions of the hollow hole (26).
    [0037] [037] Figure 4 illustrates a view of the turning tool holder (2) shown in figures 1 and 2. The first portion of the coolant duct system extends through the tool body (4), and the terminal portion of the refrigerant duct system extends through the shim (8). The end portion comprises a hollow hole (26), as discussed above with reference to the modalities of figures 3a and 3b. A section (30) of the first portion of the refrigerant duct system adjacent to the terminal portion is formed by the shim (8) and a depression (32) in the tool body (4), in the base portion of the recess (18). The first portion of the refrigerant duct system further comprises a straight duct portion (34) in the tool body (4), and a refrigerant distribution passage (36) in the tool body (4). The straight duct portion (34) extends from the depression (32) to the coolant dispensing passage (36). The refrigerant dispensing passage (36) forms an inlet portion of the refrigerant duct system and comprises a connection arrangement for connecting the refrigerant duct system with a refrigerant supply system for a given lathe. In these embodiments, the refrigerant dispensing passage (36) comprises several refrigerant dispensing passages (36 ', 36 "). Referring to figure 2, a connection arrangement (38) is schematically illustrated to connect the duct system of refrigerant with a refrigerant supply system for a specific lathe, whose connection arrangement comprises a threaded connection.
    [0038] [038] With reference to figure 4, the refrigerant in the refrigerant duct system circulates from the refrigerant distribution passage (36), through the straight duct portion (34), the section (30) and the hollow hole ( 26) for the refrigerant outlet opening (12). From the refrigerant outlet opening (12), a jet of refrigerant (39) is directed to a space expected to comprise a cutting zone of a workpiece.
    [0039] [039] The depression (32) comprises a surface (35) which extends substantially perpendicular to the straight duct portion (34) (see figure 2), that is, the surface (35) of the tool body (4 ) in the depression (32), through which the straight duct portion (34) is perforated, during the manufacture of the turning tool holder. As shown in figure 4, the straight duct portion (34) extends at an acute angle to a plane that extends along the base portion of the recess (18) and the first surface (20) of the shim (8). In this way, the straight duct portion (34) is connected to the refrigerant distribution passage (36).
    [0040] [040] Also, the coolant distribution passage (36) is suitably produced by drilling in the tool body (4). Since the refrigerant distribution passage (36) has to be connected to the refrigerant distribution system of a particular lathe, the refrigerant distribution passage (36) must have an end conveniently arranged on the tool body (4) . Due to the provision of the acute angle, the straight duct portion (34) is able to reach the then disposed refrigerant distribution passage (36). The refrigerant distribution passage (36) extends in a different direction with respect to the straight duct portion (34).
    [0041] [041] As shown in figure 4, the hollow hole (26) of the terminal portion has a first diameter, and the straight conduit portion (34) has a second diameter. In these modalities, the second diameter is larger than the first diameter.
    [0042] [042] Returning to figure 2, the wedge (8) comprises an opening (40) for fixing said wedge (8) on the tool body (4). The opening (40) is separated from the hollow hole and the refrigerant outlet opening (12). A screw (42) is adapted to extend through the opening (40) and engage with a threaded hole (44) in the tool body (4), in order to secure the shim (8) in the tool body (4) .
    [0043] [043] Figure 5 illustrates a turning tool holder (2), according to the presented modalities. The turning tool holder (2) comprises a tool body (4), a cutting tool insert (6), a shim (8) and a clamping arrangement (10). The shim (8) and the cutting tool insert (6) are arranged in a recess (18) of the tool body (4). The cutting tool insert (6) is a four times interchangeable insert, that is, it comprises four separate cutting edges (14, 14 '), which one at a time, can be positioned to extend out of the recess (18 ) on the turning tool holder (2), to connect with a specific workpiece. Two of the cutting edges (14, 14 ') are visible in figure 5. The other two cutting edges are positioned in the recess (18). In these embodiments, the cutting tool insert (6) has a rhomboidal shape. A coolant duct system extends through the turning tool holder (2). A refrigerant outlet opening (12) of the refrigerant duct system is provided in the shim (8). From the coolant outlet opening (12), a jet of coolant can be directed from one side of a relief surface of a connecting cutting edge (14 ') of the cutting tool insert (6), unobstructed by the cutting tool insert, in the direction of an expected space to comprise a cutting zone of a workpiece. Additional aspects and characteristics of the turning tool holder (2) may be similar to the modalities discussed in connection with figures 1-4.
    [0044] [044] Figures 6a-6c illustrate a cutting tool insert (6), according to the modalities presented. The cutting tool insert (6) is adapted to be used in a turning tool holder, according to any aspect or modality presented here. Figure 6a illustrates the cutting tool insert (6) in a perspective view; Figure 6b illustrates the cutting tool insert (6) in a side view perpendicular to a central axis (66) of the cutting tool insert (6); and figure 6c illustrates the cutting tool insert (6) in a side view, along the central axis (66).
    [0045] [045] The cutting tool insert (6) comprises a insert body (50). The insert body (50) comprises two opposite parallel side surfaces (52, 54) and four mutually substantially identical side surfaces (56), which extend between the side surfaces (52, 54). While the side surfaces (52, 54) are substantially flat in large portions thereof, each side surface (56), when viewed as a whole, are non-uniform surfaces. The cutting tool insert (6) comprises four separate cutting edges (14), arranged symmetrically on each side surface (52, 54). Each separate cutting edge (14) comprises a first cutting edge portion (58), which extends along a flange portion of a side surface (52, 54), and a second cutting edge portion (60 ), which extends along a flap portion of a lateral surface (56), in a direction of the lateral surface (52, 54), to an imaginary intermediate plane (62) disposed between and in parallel with the lateral surfaces (52 , 54) (see figure 6b). In other words, the first cutting edge portion (58) extends along an intersection between a cutting edge exit surface (14) and a relief surface of the first cutting edge portion (58), provided by one of the side surfaces (52, 54). The second cutting edge portion (60) extends along an intersection between the cutting edge exit surface (14) and a relief surface of the second cutting edge portion (60) provided by one of the side surfaces (56). Alternatively, it can be said that the first cutting edge portion (58) extends along an intersection between one of the side surfaces (52, 54) and one of the side surfaces (56), and the second cutting edge portion (60) extends along an intersection between two of the side surfaces (56).
    [0046] [046] The imaginary intermediate plane (62) extends in the intermediate portion of the cutting tool insert (6), between the lateral surfaces (52, 54). The first cutting edge portion (58) is interconnected with the second cutting edge portion (60), through a corner edge portion (64). The insert body (50) comprises a hollow hole (65) which extends along the central axis (66). The cutting tool insert (6) can be attached to a specific turning tool holder in the hollowed hole (65).
    [0047] [047] The corner edge portion (64) can form a circular arc that extends between the first cutting edge portion (58) and the second cutting edge portion (60). Alternatively, the corner edge portion (64) can form a curve having more than one radius. Only some of the eight cutting edges (14), their first and second cutting edge portions (58, 60) and the corner edge portions (64) are indicated with numerical references in figures 6a-6c. The eight cutting edges (14) are located symmetrically in the corner portions of the insert body (6), and since the eight cutting edges (14) and the respective corner portions are identical, their different details are also clearly shown on the cutting edges and corner portions shown in figures 6a-6c, which are not provided with numerical references. The same is also true for the other details of the cutting tool insert (6).
    [0048] [048] The central axis (66) extends perpendicularly to the lateral surfaces (52, 56), through the cutting tool insert (6). When viewed in a view along the central axis (66), that is, a view as illustrated in figure 6c, the cutting tool insert (6) comprises a corner point (68) on each of the corner edge portions (64). Four of the corner points (68) are symmetrically arranged on each of the side surfaces (52, 54), with equal diagonal stretches between the corner points (68) of each side surface (52, 54). In other words, the four corner points (68) on each of the side surfaces (52, 54) are arranged in a square, as indicated by the dashed lines in figure 6c. Each corner point (68) forms an outermost point of each cutting edge (14), when viewed in lateral view along the central axis (66). Thus, for example, in a perspective view, the corner points (68) cannot be clearly distinguished due to the arc-shaped corner edge portions (64), and a smooth transition between the corner edge portions ( 64) and their respective first and second cutting edge portions (58, 60).
    [0049] [049] A first angle (δ) between an imaginary first line (70), which extends from a first corner point (68 ') to a second corner point (68 ") of two adjacent corner points ( 68) on a side surface (52), and a second imaginary line (72), which extends along a tip portion (74) of the first cutting edge portion (58), at the first corner point (68 ), is within the range of 15-25 °. Thus, on one side of the relief surface of the cutting edge (14) at the second corner point (68 "), the cutting tool insert (6) is lowered , so as not to interfere with the coolant outlet opening on the shim, when the cutting tool insert (6) is arranged on a turning tool holder.
    [0050] [050] When viewed in a side view along the central axis (66), that is, the view illustrated in figure 6c, a second angle (β) of approximately 17 ° can be formed between a third imaginary line (76), extending from the central axis (66) to one of the corner points (68 ") on a first lateral surface (52) of the lateral surfaces (52, 54), and a fourth imaginary line (78), which extends from the central axis (66) to an adjacent corner point (68) of the corner points (68), on a second side surface (54) of the side surfaces (52, 54).
    [0051] [051] A corner angle (a) between the first cutting edge portion (58) and the second cutting edge portion (60) can be arranged within a range of 75 to <90 °. In these embodiments, the first and second cutting edge portions (58, 60) are straight, as seen in a top view of a given cutting edge (14). If the first and / or second cutting edge portions are curved, the corner angle (a) is measured between the tangents of the first and / or second cutting edge portions. The first cutting edge portion (58) and the second cutting edge portion (60) have substantially the same extent. Thus, a substantially equal depth of cut along each of the two orthogonal cutting directions can be provided by each cutting edge (14).
    [0052] [052] Depending on the modality, the extensions of the cutting edge portions (58, 60) can be properly defined. Thus, for example, an extension of the first and second cutting edge portions (58, 60) can be defined, among other things, by the ground portions of the side surfaces (52, 54) and ground portions of the side surfaces (56). Another example of defining an extension of the first and second cutting edge portions (58, 60) can be from an intersection between lines extending along the first and second cutting edge portions (58, 60) to a different change of direction of a flap portion of the insert body (50). Alternatively, the extent can be defined from an end of the arc that forms the corner edge portion (64). A further definition of the extent of the first and second cutting edge portions (58, 60) may be the portion of a cutting edge portion (59, 60) over which a given chip breaker extends.
    [0053] [053] According to some modalities, each of the first cutting edge portion (58) and the second cutting edge portion (60) can be adapted to provide a depth of cut of at least 4 mm, along each of the two orthogonal cutting directions. By way of example only, the distance between the lateral surfaces (52, 54), along the central axis (66) can be 10 mm, and the distance between two adjacent corner points (68) can be 11 mm.
    [0054] [054] The cutting tool insert (6) can have a ratio of approximately 1: 1 between a distance that extends between the lateral surfaces (52, 54) along the central axis (66), and a distance that extends extends between two adjacent corner points (68) on one of the side surfaces (52, 54). The cutting tool insert (6) can thus be shaped to provide second cutting edge portions (60) of substantially the same length as the first cutting edge portions (58), and the cutting tool insert (6) can be used on right-hand and left-hand tool holders. Furthermore, this is not the only example of the proportion, so that a cutting tool insert (6) can present a proportion within a range of 0.7: 1 to 1.1: 1 between said distances. .
    [0055] [055] The present invention is not construed as limited to the modalities set forth herein. A person skilled in the art will imagine that different characteristics of the modalities disclosed herein can be combined to create different modalities from those described here, without departing from the scope of the present invention, as defined by the appended claims. It is also understood by those skilled in the art that the invention can be implemented on turning tool holders with operational direction to the right, as well as, as illustrated, on turning tool holders with operational direction to the left.
    [0056] [056] Although the invention has been described with reference to the exemplary modalities, several and different changes, modifications and similar actions will become evident to those skilled in the art. Thus, for example, the shim (8) can be provided with one or more additional hollow holes forming part of the refrigerant duct system and adapted to direct one or more additional coolant jets in the direction of a workpiece. Therefore, it should be understood that the matter described above is illustrative of several exemplary modalities and that the invention is only defined by the appended claims.
    [0057] [057] As used herein, the term "comprising" or "comprises" is unlimited in nature and includes one or more of the characteristics, elements, steps, components or functions indicated, but does not prevent the presence or addition of one or more others among characteristics, elements, stages, components, functions or groups thereof.
    权利要求:
    Claims (17)
    [0001]
    Turning tool holder (2), comprising: - a tool body (4); - a cutting tool insert (6); - a wedge (8); and - a clamping arrangement (10); wherein the tool body (4) comprises a recess (18), the wedge (8) being arranged in a base portion of the recess (18), and the cutting tool insert (6) being releasably fixed by the clamping arrangement (10) against the shim (8), and in which a refrigerant duct system extends through the turning tool holder (2), a first portion of the refrigerant duct system extends through the tool body (4) and a terminal portion of the refrigerant duct system extends through the wedge (8); characterized by the fact that - the end portion of the refrigerant duct system comprises a hollow hole (26) extending from a first surface (20) of the shim (8) facing a base of the recess (18) to a second opposite surface (22 ) of the shim (8); and in what - the end portion comprises an outlet opening of a refrigerant medium (12) on the second surface (22), the outlet opening of refrigerant medium (12) being formed only by the wedge (8); and in what - the shim (8) and the coolant outlet (12) are configured to direct a jet of coolant from the coolant outlet (12), unobstructed by the cutting tool insert (6 ), in the direction of a space expected to comprise a cutting zone of a workpiece.
    [0002]
    Turning tool holder (2) according to claim 1, characterized in that a lateral portion (24) of the shim (8) extends beyond a body (50) of the cutting tool insert (6 ), and in which the outlet opening of the cooling medium (12) is provided on the second surface (22), on the lateral portion (24).
    [0003]
    Turning tool holder (2), according to claim 1 or 2, characterized by the fact that the hollow hole (26) has a uniform diameter along its entire length, through the shim (8).
    [0004]
    Turning tool holder (2) according to claim 1 or 2, characterized in that the hollow hole (26) comprises at least one tapered portion (28, 28 ', 28' ').
    [0005]
    Turning tool holder (2) according to any one of the preceding claims, characterized in that a section (30) of the first portion of the refrigerant duct system, adjacent to the terminal portion, is formed by the shim (8) and a depression (32) in the tool body (4), in the base portion of the recess (18).
    [0006]
    Turning tool holder (2) according to claim 5, characterized in that the first portion of the refrigerant duct system comprises a straight duct portion (34) and a coolant distribution passage (36) in the tool body (4), and in which the straight duct portion (34) extends from the depression (32) to the coolant distribution passage (36).
    [0007]
    Turning tool holder (2) according to claim 6, characterized in that the depression (32) comprises a surface (35) that extends perpendicularly to the straight duct portion (34).
    [0008]
    Turning tool holder (2) according to claim 6 or 7, characterized in that the straight duct portion (34) extends at an acute angle to a plane that extends along the base portion of the recess (18) and the shim (8).
    [0009]
    Turning tool holder (2) according to any one of claims 6 to 8, characterized in that the end portion has a first diameter and the straight duct portion (34) has a second diameter, and in which the second diameter is equal to or greater than the first diameter.
    [0010]
    Turning tool holder (2) according to any one of claims 6 to 9, characterized in that the coolant distribution passage (36) forms an inlet portion of the coolant duct system, comprising an arrangement connection port (38) to connect the refrigerant duct system with a refrigerant supply system from a relevant lathe.
    [0011]
    Turning tool holder (2) according to any one of claims 6 to 10, characterized in that the coolant distribution passage (36) extends in a different direction, with respect to the straight duct portion (34) .
    [0012]
    Turning tool holder (2) according to any one of the preceding claims, characterized in that the shim (8) comprises an opening (40) for securing the shim (8) to the tool body (4), and wherein the opening (40) is separated from the hollow hole (26).
    [0013]
    Turning tool holder (2) according to any one of the preceding claims, characterized in that the cutting tool insert (6) is an eight-interchangeable cutting tool insert (6).
    [0014]
    Turning tool holder (2), according to claim 13, characterized by the fact that: - the insert of the cutting tool (6) comprises a insert body (50), the insert body (50) comprising two opposite parallel side surfaces (52, 54) and four mutually identical side surfaces (56), which extend between the side surfaces (52, 54); - the cutting tool insert (6) comprising four separate cutting edges (14), arranged symmetrically on each side surface (52, 54); on what, - each separate cutting edge (14) comprises a first cutting edge portion (58), extending along a flange portion of a side surface (52, 54) and a first cutting edge portion (60) , extending along a flap portion of a lateral surface (56) in a direction from the lateral surface (52, 54) to an imaginary intermediate plane (62), arranged between and in parallel with the lateral surfaces (52, 54), wherein the first cutting edge portion (58) is interconnected with the first cutting edge portion (60) through a corner edge portion (64); on what, - when viewed in a side view along a central axis (66), the central axis (66) extends perpendicularly to the side surfaces (52, 54), the cutting tool insert (6) comprising a point of corner (68) on each of the corner edge portions (64), where four of the corner points (68) are symmetrically arranged on each of the side surfaces (52, 54), with equal diagonal distances between the corner points (68 ); and in which, - a first angle (δ) between an imaginary first line (70), extending from a first corner point (68 ') to a second corner point (68 ") of two adjacent corner points (68, 68 ', 68 ") on a side surface (52, 54), and a second imaginary line (72), which extends along a tip portion (74) of the first cutting edge portion (58), at the first corner point (68), is within the range of 15-25 °.
    [0015]
    Turning tool holder (2) according to claim 14, characterized by the fact that when viewed in the side view along the central axis (66), a second angle (β) of approximately 17 ° is formed between a third imaginary line (76), which extends from the central axis (66) to one of the corner points (68) on a first lateral surface (52) of the lateral surfaces (52, 54), and a fourth imaginary line (78 ), which extends from the central axis (66) to an adjacent corner point (68) of the corner points (68) on a second side surface (54) of the side surfaces (52, 54).
    [0016]
    Cutting tool insert (6), adapted for use in a turning tool holder (2), as defined in any of the preceding claims, wherein the cutting tool insert (6) is a cutting tool insert cut (6) eight times interchangeable, comprising a insert body (50), the insert body (50) comprising two opposite parallel side surfaces (52, 54) and four mutually identical side surfaces (56), extending between the side surfaces (52, 54); - the cutting tool insert (6) further comprises four separate cutting edges (14), arranged symmetrically on each side surface (52, 54); on what, - each separate cutting edge comprises a first cutting edge portion (58), extending along a flap portion of a side surface (52, 54) and a first cutting edge portion (60), extending along a flap portion of a lateral surface (56) in a direction from the lateral surface (52, 54) to an imaginary intermediate plane (62), arranged between and in parallel with the lateral surfaces (52, 54), wherein the first cutting edge portion (58) is interconnected with the first cutting edge portion (60) through a corner edge portion (64); on what, - when viewed in a side view along a central axis (66), the central axis (66) extends perpendicularly to the side surfaces (52, 54), the cutting tool insert (6) comprising a point of corner (68) on each of the corner edge portions (64), where four of the corner points (68) are symmetrically arranged on each of the side surfaces (52, 54), with equal diagonal distances between the corner points (68 ); and characterized by the fact that - a first angle (δ) between an imaginary first line, extending from a first corner point (68 ') to a second corner point (68 ") of two adjacent corner points (68, 68', 68 ") on a side surface (52, 54), and a second imaginary line, which extends along a tip portion of the first cutting edge portion (58), at the first corner point (68), is within the range of 15-25 °.
    [0017]
    Cutting tool insert (6) according to claim 16, characterized by the fact that when viewed in the side view along the central axis (66), a second angle (β) of approximately 17 ° is formed between a third imaginary line (76), which extends from the central axis (66) to one of the corner points (68) on a first lateral surface (52) of the lateral surfaces (52, 54), and a fourth imaginary line (78 ), which extends from the central axis (66) to an adjacent corner point (68) of the corner points (68) on a second side surface (54) of the side surfaces (52, 54).
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    CN105081376A|2015-11-25|
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    法律状态:
    2017-07-18| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2018-10-30| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-12-31| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-12-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-02-17| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 15/05/2015, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP14168809.3A|EP2946857B1|2014-05-19|2014-05-19|Turning tool holder and cutting tool insert|
    EP14168809.3|2014-05-19|
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