• 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:
    The invention relates to a metal circular saw blade with a circular disk-shaped master blade and interchangeable cutting inserts. In cutting inserts (6) for a metal circular saw blade (1) extend two contact faces (27 a) of the cutting insert (6) at an acute angle in the range of 6 ° to 24 ° to each other, this angle corresponds to the opening angle of the free space in the at Assembly of the cutting insert (6) on the master sheet (2) the seat surface (8) of the master blade (2) is received with the correspondingly aligned seat partial surfaces (8a). Between the contact partial surfaces (27a) is a flat contact-bearing surface (27b) and between the seat partial surfaces (8a) a flat seat-bearing surface (8b) is arranged. The successive assembly of the flat contact-bearing surface (27b) and the flat seat-bearing surface (8b) ensures a precise alignment of the cutting edge (28) with respect to the contact plane. The precise alignment with respect to rotation within this plane is ensured by the interaction of the contact partial surfaces (27a) with the seat partial surfaces (8a).
    公开号:CH712311A2
    申请号:CH00423/16
    申请日:2016-03-31
    公开日:2017-10-13
    发明作者:Bisig Johann
    申请人:Sw Wil Werkzeug- Und Maschinenhandel Ag；
    IPC主号:
    专利说明:

    Description: [0001] The invention relates to a metal circular saw blade and to replaceable saw teeth therefor, so-called inserts or cutting inserts, according to the preambles of claims 1 and 7.
    Metal circular saw blades with a master blade and fixed along its perimeter replaceable cutting inserts are used for sawing metal parts, such as metal pipes. For sawing the metal circular saw blades are used in circular saws, the peripheral speed and the feed are adapted to the respective cutting process and the product to be cut. Frequently, metal circular saw blades with diameters in the range of 500 to 3000 mm are used. The thickness or thickness of the spread saw blades is substantially in the range of 4 to 12 mm.
    Because when sawing metals on the circular saw blade high wear and temperature fluctuations, steel is used, which is resistant and endures the temperature fluctuations. It is usually used a low alloyed tool steel. For example, chromium-vanadium steels and also tungsten-alloyed steels are particularly suitable.
    Along the circumference of the metal circular saw blades are alternately formed teeth with cutting edges and chip spaces. The radial position of the outer boundary of the metal circular saw blade thus varies along the circumference, in the case of the teeth, the distance to the axis of rotation is greater than in the chip spaces. Thus, the separated chips do not stick to the metal circular saw blade, the chip spaces of the metal circular saw blades are formed sufficiently large. For the separation of pipe sections with large diameters, for example, the radial distance between a radially inwardly lying lowest point of the chip spaces and a cutting edge is greater than 4 mm and extends in particular over a radial edge region of up to 12 mm.
    DE 20 2005 006 762 U1 describes master leaves are arranged at the periphery of replaceable cuboid cutting inserts on seats of the master sheet. The seats of the master blade each include a substantially tangentially oriented seating surface and a substantially radially oriented seating surface with which a cutting insert is in contact via its lower and rear abutment surfaces, the connection being achieved with a substantially radially extending screw. An embodiment is described in which the cutting insert projects laterally beyond the master blade and the lower abutment surface of the cutting insert is U-shaped as viewed in cross-section, with the two projecting legs of the U-shape extending along both sides of the parallel side surfaces of the stem blade and correspondingly aligned parallel to each other. It has been found that the alignment accuracy of the cutting inserts and the power transmission from the cutting inserts to the master blade is not sufficiently good and undesirable vibrations and disturbances occur during sawing.
    EP 1 827 744 B1 describes master sheets at the periphery of which interchangeable cutting inserts are arranged. The interchangeable cutting inserts comprise a cutting edge and facing away from a lower and a rear contact surface to the master sheet, and two lateral outer surfaces, each with a mounted on the master blade cutting inserts from a radially inner edge line at least over a portion of its radial extent in a plane of a side surface of Stem leaf extend and connect with its inner edge line directly to an associated outer edge line of the stem leaf.
    Both contact surfaces comprise two depending from a lateral outer surface outgoing contact partial surfaces, wherein the angle between the two contact partial surfaces of a contact surface is blunt, namely clearly greater than 90 ° and a maximum of about 150 °. The two contact partial surfaces of a contact surface are each connected to one another via a central curvature region, wherein the central curvature region in the direction perpendicular to the lateral outer surfaces of the cutting inserts has a substantially smaller extent than the contact partial surfaces. Therefore, the contact surfaces are referred to as V-shaped design, wherein the central curvature region of the central tip of the v-shape corresponds.
    At the master blade a seat with an outer and a rear seat surface is formed for each cutting insert, wherein the seating surfaces analogous to the contact surfaces each have two seat part surfaces between which an obtuse angle is formed. The obtuse angle between seat partial surfaces is adapted to the obtuse angle between the associated contact partial surfaces of the cutting insert and thereby substantially the same size. With a guided in the radial direction through a bore of the cutting insert and screwed in a radially oriented thread of the master blade screw the cutting insert is positioned on the seating surfaces. It has been shown that the cutting edges of the cutting inserts attached to the master blade are not all aligned exactly the same with respect to the axis of rotation of the master blade, which can lead to unwanted vibrations and disturbances and increased wear of the cutting inserts during sawing.
    EP 2176 021 B1 describes a similar solution as EP 1 827 744 B1, wherein the cutting inserts again have contact partial surfaces or insert support surfaces, between each of which an obtuse angle is formed. In addition to these contact surfaces with alignment function, each contact surface also includes two spaced apart coplanar bearing surfaces intended to increase the stability of the cutting inserts used. It has been found that even with this solution, the cutting edges of the cutting inserts attached to the master blade are not aligned exactly the same with respect to the axis of rotation of the master blade, which can lead to unwanted vibrations and disturbances and corresponding high loads of the cutting inserts and the master sheets when sawing.
    Thus, in worn teeth of the intact part of a Trennsägeblattts, namely the master sheet, can be used, the teeth of interchangeable cutting inserts are formed with a radially outer, preceding in the direction of rotation cutting edge. Worn cutting inserts are replaced. When replacing results in downtime. In order to keep the sum of the downtimes in relation to the operating time as short as possible, metal circular saw blades are desired with the longest possible service life.
    The present invention has for its object to find a simple solution that keeps the stresses of the cutting inserts and the stem leaves as deep as possible and ensures long service life.
    This object is solved by the features of claim 1 or of claim 7. The dependent claims describe preferred or alternative embodiments.
    As part of a first inventive step, it was recognized that the loads of the cutting inserts and the master sheets can then be reduced if the cutting inserts are accurately positioned or aligned after assembly on the master sheet and ensures optimum power transmission from the cutting inserts on the master sheet is. The known from the prior art under obtuse angles v-shaped mutually extending contact faces allow in contact with the corresponding at an obtuse angle to each other running seat faces of the stem small alignment inaccuracies, because they are perpendicular to the lateral Außenflä chen of Cutting insert over a wide range of width of the contact surfaces and the seat surfaces and lie along not exactly defined contact lines mainly abut each other.
    If two lines of contact are aligned somewhat asymmetrically to the center axis of the cutting insert extending between the two lateral outer surfaces of the cutting insert, then a corresponding alignment inaccuracy of the cutting insert results. Due to the obtuse angles, no movement into the centered position can be ensured when tightening. The insufficient alignment assurance when tightening is still worsened in solutions of the cited prior art that not only the lower but also a rear contact surface is formed to the master sheet with two mutually at obtuse angles to each other extending contact faces. The rear contact surface can not be pressed against the corresponding seat with the substantially parallel to the rear contact surface extending fastening screw. Due to the obtuse angles and the overdetermination of the alignment elements, annoying alignment inaccuracies arise, at least in the case of rapid assembly of the cutting inserts.
    E in metal circular saw blade according to the invention comprises a circular disk-shaped master blade having two mutually parallel side surfaces and disposed along the peripheral edge seats for cutting inserts and is rotatable about a perpendicular to the side surfaces through the center of the master blade leading axis of rotation. Each seat includes a seat surface extending in a direction along the peripheral edge and in which a bore for screwing a fastening screw is arranged. In addition, the seat surface comprises two depending on each of the two side surfaces outgoing seat sub-surfaces, which extend in a direction along the peripheral edge and are aligned differently in the direction transverse thereto. Each seat includes a rear force-receiving surface extending transversely to the seat surface.
    The advantages over the known solutions are achieved in that each seat between the two seat-part surfaces comprises a flat seat-bearing surface, which is aligned parallel to the axis of rotation and at their side surfaces facing edge lines is each connected to a seat-part surface such that the planar seat support surface on the stem blade is radially outward, the seat sub-surfaces extend from their respective edges in the planar seat support surface in directions against the axis of rotation, and the distance between the seat sub-surfaces in a direction away from the planar seat -Auflagefläche increases against the axis of rotation, wherein between the surface normal of the flat seat support surface and the planes through the two seat part surfaces each an acute angle in the range of 3 ° to 12 ° is formed.
    In the production of a master sheet processing costs for the formation of the inventive seats in comparison to the formation of seats of the known from the prior art solutions is significantly smaller. For the formation of the seat partial surfaces only a minimal volume of material has to be removed with an extremely simple geometry. The flat seat-bearing surfaces and the rear force receiving surfaces can be precisely formed with little effort.
    A cutting insert according to the invention is parallelepiped-shaped with a front surface, two lateral and one upper outer surfaces, a transfer surface remote from the front surface, a contact surface for contact with a seat surface of a master blade and a cutting edge formed at the transition from the front surface to the upper outer side a bore for receiving a fastening screw from the upper outer surface leads to the contact surface, the central axis of the cutting insert between the lateral outer surfaces and passes through the central areas of the front surface and the rear transmission surface and the contact surface has two contact surfaces, in the direction transverse to Center axis are aligned differently.
    The advantages over the known solutions are achieved in that the contact surface between the two contact-part surfaces comprises a flat contact-bearing surface which is connected at their side outer surfaces facing edge lines each with a contact-part surface, so that the planar contact-bearing surface and the contact-part surfaces form a recess in the cutting set, wherein the distance between the contact-part surfaces increases in a direction away from the flat contact-bearing surface and between the surface normal of the flat contact-bearing surface and the planes through the two contact Partial surfaces each formed an acute angle in the range of 3 ° to 12 °.
    The simple shape of the separating insert allows sintering with all the form elements, wherein optionally at least individual edges are slightly rounded. Post-processing is only required for preferred designs with special molding properties and can be carried out, for example, with a die sinking method.
    In the inventive solution thus two contact partial surfaces of the cutting insert extend at an acute angle in the range of 6 ° to 24 ° to each other, said angle corresponds to the opening angle of the free space in which during assembly of the cutting insert on the master sheet the seat with the appropriately aligned seat partial surfaces is added. Between the contact-part surfaces is the flat contact-bearing surface and between the seat-part surfaces, the flat seat-bearing surface is arranged. The juxtaposition of the flat contact-bearing surface and the flat seat-bearing surface ensures precise alignment of the cutting edge with respect to the contact plane. The precise alignment with respect to rotation within this plane is ensured by the interaction of the contact faces with the seat faces. Thus, it can be ensured that the cutting edge of the cutting insert is aligned parallel to the axis of rotation of the master blade. The center axes of the cutting inserts are all in the median plane of the master blade.
    In a cross-section of the cutting insert made perpendicular to the central axis, the contact surface forms a concave receiving area for the seating surface of the master blade, with the concave receiving area minimally narrowing from an access opening between free ends of legs towards the planar contact seating surface. The two contact partial surfaces, or the mutually facing inner sides of the legs, each include an acute angle to the surface normal of the flat contact bearing surface. Preferably, the angle is in the range of 3 ° to 8 °, in particular 6 ° to 8 °, or at 7 °.
    The seating surfaces of the master blade are adapted to the concave receiving areas of the cutting inserts and comprise a planar or planar seating surface and two laterally adjoining seat partial surfaces. Between the surface normals of the flat seat support surface and the two seat part surfaces, an acute angle is preferably formed in the range of 3 ° to 8 °, in particular 6 ° to 8 °, or 7 °.
    When mounting a cutting insert on the seat of a master blade of the cutting insert is pressed by a screw with the flat contact-bearing surface to the flat seat-bearing surface and secure the contact faces by the concerns of the corresponding seat-part surfaces, the exact alignment of the central axis the cutting insert in the center plane of the master blade and preferably a self-locking state between the slightly conical contact faces and the adjoining seat faces. In order to ensure the alignment even with tolerance-related shape deviations of the formed on the master sheet seat faces and formed on the cutting inserts contact faces is formed in a preferred embodiment in the connections of the contact bearing surface with the contact faces each have a groove and in particular the contact surfaces are formed on webs which are connected slightly about axes at the grooves resiliently with the rest of the cutting insert. This minimal spring characteristic results in a precise alignment and self-locking state even with small deviations from the optimum shape.
    Each cutting insert is closed in the direction of its central axis on its rear side sawing from a transfer surface and on its front side sawing from a front surface with the outer cutting edge. The angle between the transfer surface and the surface normal of the planar contact bearing surface is in the range of 3 ° to 12 °, preferably from 3 ° to 8 °, in particular from 6 ° to 8 °. On the master blade, a rear force-receiving surface is formed for each cutting insert together with the seat, in which the bore for the fastening screw is arranged. The angle between the rear force receiving surface and the surface normal of the flat seat bearing surface is in the range of 3 ° to 12 °, preferably from 3 ° to 8 °, in particular from 6 ° to 8 °.
    The rear force receiving surface is at a mounted cutting insert on the transfer surface of the cutting insert. Preferably, these two elements have the same thickness at the contact surface, namely the thickness of the stem leaf. The cutting edge is preferably slightly above the master blade on both sides. When sawing, the cutting edge engages in the material to be separated, resulting in a torque acting on the cutting insert which, on the one hand, presses against the rear force-receiving surface and, on the other hand, transmits tensile forces to the thread of the master blade via the fastening screw.
    In a preferred embodiment, outgoing from the torque forces, which act on a lifting of the cutting insert of the support surface, received by the fastening screw and also by a self-locking between the slightly conical contact partial surfaces and the adjoining seat partial surfaces. The self-locking is achieved in that the cone angle between the contact partial surfaces and the seat partial surfaces is selected so that caused by static friction resistance to slippage of the contact partial surfaces of the adjoining seat partial surfaces arises.
    The fastening screw achieved by the pulling together of the contact partial surfaces and the seat partial surfaces for the self-locking forces between the bearing surfaces. The self-locking is influenced by the angle of inclination, the surface roughness of the bearing surfaces, the material combination, the heating and possibly other parameters. To achieve self-locking, the resulting angle is made smaller than the arctangent of the static friction coefficient. The materials commonly used for stock blades and cutting inserts result in static friction, which ensures self-locking even in the cone angle range of 12 ° to 7 °. If the arctangent of the coefficient of static friction is not already in the angular range of 7 ° to 12 °, a cone angle in the range of 3 ° to 7 ° is preferably selected. If the angle required for the self-locking becomes too small, the stiction can also be increased by increasing the surface roughness.
    For optimum power transmission, the bore for screwing in a fastening screw in the master blade in the central region of the flat seat support surface and the cutting insert in the central region of the upper outer surface and the contact support surface is arranged in preferred embodiments.
    When sawing with cutting inserts, which transmit the forces on the rear force receiving surface, the fastening screw and the self-locking on the master sheet, unwanted vibration and disturbances can be largely prevented, which also reduces the wear of the cutting inserts and the strain of the master sheet.
    At the end facing away from the rear force receiving surface of each flat seat-bearing surface joins in the direction of the peripheral edge in each case a chip space. Interference can be additionally avoided by an optimal design of the chip space. In a preferred embodiment, starting from the flat seat support surface as transition to the chip space, a flat ramp surface is formed, wherein the angle between the surface normals of the flat seat support surface and the flat ramp surface in the range of 45 ° to 70 °, preferably from 50 ° to 60 °, lies.
    In order to saw steel tubes with high strengths and large pipe wall thicknesses, stem leaves are used with carbide or other cutting inserts. In particular, the master blade is at least partially made of a low alloyed tool steel, preferably with chrome vanadium or tungsten. The steel belongs in particular to the group of steels 80CrV2 (DIN substance number 1.2235), 80CrV23 (DIN 1.2236) and 73WCrMoV22 (DIN 1.2604). To further reduce wear, the surfaces of the master blades and / or cutting inserts are optionally treated with a thermochemical process. In this case, the surface can be supplied, for example, NH3, N2, and H20. Nitriding layers are produced, for example, in salt baths, in gas or in plasma processes on the base sheets or the cutting inserts.
    The invention is reflected in the specially processed master sheet, in the master sheet with mounted cutting inserts and in the cutting inserts. Because the master blade and the cutting inserts also come separately on the market, a suitable protection in the sense of protection for lock and key for both must be achievable. Individual features of the stem sheet or of the cutting inserts can be better understood in conjunction with the respective other object or corresponding functional features.
    For countries in which no patent with independent claims for a master sheet and cutting inserts is achievable, a claim is made for a master sheet with cutting inserts. In terms of indirect infringement, this protection should also include the individual elements, namely a master blade and cutting inserts.
    The drawings illustrate the invention with reference to an embodiment, to which it is not limited. Show
    1 is a side view of a master sheet,
    2 is a plan view of a master sheet,
    3 shows an enlargement of the section indicated by A in FIG. 2 with a cutting insert, FIG.
    4 is a view of a detail according to arrow B in Fig. 2,
    5 is a view of a detail according to arrow C in Fig. 2,
    6 shows an enlargement of the section shown in FIG. 2 with A without a cutting insert but with angles and dimensions, FIG.
    7 is a perspective view of a section of a stem sheet with partially mounted cutting inserts,
    8 shows a section through a in Fig. 2 with A displayed cutout with cutting insert,
    9 is a front view of a cutting insert,
    10 is a side view of a cutting insert,
    11 is a plan view of a cutting insert,
    Fig. 12 is a perspective view of a cutting insert.
    Fig. 1 to 8 show a metal circular saw blade 1, which has a circular disk-shaped master sheet 2 with two mutually parallel side surfaces 3 and arranged along the peripheral edge 4 seats 5 for cutting inserts 6 and a perpendicular to the side surfaces 3 through the center of the master sheet 2 leading axis of rotation 7 is used rotatably. Each seat 5 comprises a seat surface 8 which extends in one direction along the peripheral edge 4 and in which a bore 9 for screwing in a fastening screw 10 is arranged. In addition, the seat surface 8 comprises two depending from one of the two side surfaces 3 outgoing seat sub-surfaces 8a, which extend in a direction along the peripheral edge 4 and are aligned differently in the direction transverse thereto. Each seat 5 comprises a transversely to the seat 8 to the outside leading rear force receiving surface 11th
    Each seat 8 comprises between the two seat-part surfaces 8a a flat seat-support surface 8b, which is aligned parallel to the axis of rotation 7 and at their side surfaces 3 facing edge lines is each connected to a seat-part surface 8a, so that the plane Seat support surface 8b on the log sheet 2 is radially outward, the seat part surfaces 8a extend from its respective edge in the flat seat support surface 8b in directions against the axis of rotation 7 and the distance between the seat part surfaces 8a in a direction from the plane Seat support surface 8b increases against the axis of rotation 7, wherein between the surface normal 12 of the flat seat support surface 8b and the planes 13 through the two seat part surfaces 8a in the illustrated embodiment each formed an acute angle of 7 °. The width 14 of the seat support surface 8b is slightly smaller than the thickness 15 of the master sheet second
    The angle between the rear force receiving surface 11 and the surface normal 12 of the flat seat-bearing surface 8b is in the illustrated embodiment 7 °. The force receiving surface 11 extends along the surface normal 12 over a height range 16 and the thread for the fastening screw 10 over a depth range 17. Further characteristic mass for the formation of the seats are the distance 18 of the center of the bore 9 from the transition of the seat support surface 8b to the force receiving surface 11, the seat extension 19 to be machined perpendicular to the surface normal 12 and an extension 20 of a flat ramp surface 21, which forms a transition to the chip space 22 starting from the flat seat support surface 8b.
    The angle between the surface normal 12 and the flat ramp surface 21 is in the illustrated embodiment in the range of 50 ° to 60 °. For the sawing achieved during sawing the angle between the front surface 23 of the cutting insert 6 and the flat ramp surface 21 is important, which is in the illustrated embodiment at 40 °.
    3 and 7 to 12 show a cuboid cutting insert 6 with a front surface 23, two lateral Aus-senflächen 24, an upper outer surfaces 25, facing away from the front surface 23 transfer surface 26, a contact surface 27 for contact with a seat surface 8 of a master blade 2 and a cutting edge 28 formed at the transition from the front surface 23 to the upper outer side 25, wherein a bore 29 for receiving a fastening screw 10 from the upper outer surface 25 leads to the contact surface 27, the central axis 30 of the cutting insert 6 between the lateral outer surfaces 24th runs as well as through the central areas of the front surface 23 and the rear transfer surface 26 leads.
    9, 11 and 12 it is apparent that the illustrated cutting insert 6 has a cutting edge 28 which extends perpendicular to the central axis 30 over a greater width than the edge at the transition from the upper outer surface 25 to the transfer surface 26, which corresponds to the embodiment of the thickness of the master blade 2 shown in FIG. Preferably, the transfer surface 26 has a constant width adapted to the thickness of the master blade 2. According to FIG. 9, the width of the front surface 23 decreases from the cutting edge 28 against the contact surface 27.
    The contact surface 27 comprises two contact partial surfaces 27a, which are aligned with their directions transverse to the central axis 30 different from each other. In addition, the contact surface 27 between the two contact partial surfaces 27a comprises a flat contact bearing surface 27b, which is each connected to a contact partial surface 27a at their lateral outer surfaces 24 facing edge lines, so that the flat contact-bearing surface 27b and the contact surface Partial surfaces 27a form a depression in the cutting set 6. The distance between the contact faces 27a in a direction away from the planar contact bearing surface 27b increases and between the surface normal 31 of the planar contact bearing surface 27b and the planes 32 through the two contact faces 27a is one in the illustrated embodiment acute angle formed by 7 °.
    In the illustrated embodiment, a respective groove 33 is formed in the connections of the contact bearing surface 27b with the contact partial surfaces 27a. It goes without saying that the grooves 33 can also be formed by the planes with the contact partial surfaces 27a against the lateral outer surfaces 24. The contact partial surfaces 27a are mutually facing inner sides of webs 34, which are at least minimally resiliently connected to spring axes between the grooves 33 and the lateral outer surfaces 24 with the rest of the cutting insert 6. When the distance
    权利要求:
    Claims (13)
    [1]
    between the contact faces 27a and the lateral outer surfaces is sufficiently small, so the desired spring property can be achieved without a groove. The minimum spring characteristic leads to a precise alignment of the cutting inserts 6 after assembly on the master sheet 2, even with small deviations from the optimal shape. To produce a desired bias, the angles between the surface normal 31 and the contact faces 27a corresponding to the spring property the webs 34 chosen to be minimally smaller than the angles between the surface normal 12 and the seat part surfaces 8a. The angle and the spring property must be coordinated so that the contact bearing surface 8b when screwing the cutting insert 6 comes into abutting contact with the seat support surface 8b. claims
    1. metal circular saw blade (1) with a circular disk-shaped master blade (2) comprising two mutually parallel side surfaces (3) and along the peripheral edge (4) arranged seats (5) for cutting inserts (6) and a perpendicular to the side surfaces (3 ) is rotatably insertable through the center of the master blade (2), wherein each seat (5) comprises a seat surface (8) extending in one direction along the peripheral edge (4) and in which a bore (9 ) is arranged for screwing a fastening screw (10), two each from one of the two side surfaces (3) outgoing seat partial surfaces (8a) extending in a direction along the peripheral edge (4) and in the direction transverse to each other different are aligned and a transversely to the seat (8) outwardly leading rear force receiving surface (11), characterized in that each seat surface (8) between the two seat part surfaces (8a) a flat seat-bearing surface (8b) which is aligned parallel to the axis of rotation (7) and at their the side surfaces (3) facing edge lines is each connected to a seat-part surface (8a), so that the flat seat-bearing surface (8b ) on the master blade (2) lies radially outward, the seat partial surfaces (8a) extend from their respective edge in the planar seat support surface (8b) in directions against the axis of rotation (7) and the distance between the seat partial surfaces (8a ) increases in a direction from the planar seat support surface (8b) against the rotation axis (7), wherein between the surface normal (12) of the flat seat support surface (8b) and the planes (13) through the two seat part surfaces (8a ) each an acute angle in the range of 3 ° to 12 ° is formed.
    [2]
    2. metal circular saw blade (1) according to claim 1, characterized in that between the surface normal (12) of the flat seat-bearing surface (8b) and the planes (13) through the two seat partial surfaces (8a) each have an acute angle in the range of 3 ° to 8 °, preferably from 6 ° to 8 °, in particular 7 ° is formed.
    [3]
    3. metal circular saw blade (1) according to claim 1 or 2, characterized in that the angle between the rear force receiving surface (11) and the surface normal (12) of the flat seat-bearing surface (8b) in the range of 3 ° to 12 °, preferably of 3 ° to 8 °, in particular from 6 ° to 8 °.
    [4]
    4. metal circular saw blade (1) according to one of claims 1 to 3, characterized in that facing away from the rear force receiving surface (11) end of each flat seat-bearing surface (8b) in the direction of the peripheral edge (4) each have a chip space (22) connecting, wherein from the flat seat-bearing surface (8b) starting a flat ramp surface (21) is formed and the angle between the surface normals (12) of the flat seat-support surface (8b) and the flat ramp surface (21) in the range of 45 ° to 70 °, preferably from 50 ° to 60 °.
    [5]
    5. metal circular saw blade (1) according to one of claims 1 to 4, characterized in that the bore (9) for screwing in a fastening screw (10) respectively in the central region of the flat seat-bearing surface (8b) is arranged.
    [6]
    6. metal circular saw blade (1) according to one of claims 1 to 4, characterized in that on the seats (5) cutting inserts (6) are arranged.
    [7]
    7. Cutting insert (6) for fixing to a master blade (2) of a metal circular saw blade (1) according to one of claims 1 to 6, wherein the cutting insert (6) is cuboid with a front surface (23), two lateral outer surfaces (24), a upper outer surface (25), one of the front surface (23) facing away from transfer surface (26), a contact surface (27) for contact with a seat surface (8) of a master sheet (2) and one at the transition from the front surface (23) to the upper Outer side (25) formed cutting edge (28), wherein a bore (29) for receiving a fastening screw (10) from the upper outer surface (25) to the contact surface (27), the central axis (30) of the cutting insert (6) between the lateral Outer surfaces (24) extends and through the central areas of the front surface (23) and the transfer surface (26) leads and the contact surface (27) has two contact partial surfaces (27 a) which in the direction transverse to the central axis (30) are aligned differently to each other characterized in that the contact surface (27) between the two contact partial surfaces (27a) comprises a flat contact-bearing surface (27b), which in their lateral outer surfaces (24) facing edge lines each with a contact surface ( 27a), such that the planar contact bearing surface (27b) and the contact partial surfaces (27a) form a depression in the cutting set (6), wherein the distance between the contact partial surfaces (27a) in one direction from the planar contact -Apping surface (27b) increases away and formed between the surface normal (31) of the flat contact-bearing surface (27b) and the planes (32) through the two contact-part surfaces (27a) each have an acute angle in the range of 3 ° to 12 ° is.
    [8]
    8. Cutting insert (6) according to claim 7, characterized in that between the surface normal (31) of the planar contact-bearing surface (27b) and the planes (32) through the two contact partial surfaces (27a) each have an acute angle in the range of 3 ° to 8 °, preferably from 6 ° to 8 °, in particular 7 ° is formed.
    [9]
    9. cutting insert (6) according to claim 7 or 8, characterized in that in the connections of the contact bearing surface (27b) with the contact partial surfaces (27a) each have a groove (33) is formed, the contact partial surfaces (27a) are preferably formed on webs (34) which are slightly connected about axes at the grooves (33) resiliently connected to the rest of the cutting insert (6), and preferably the contact faces (27 a) in a self-locking state on the master sheet can be fixed.
    [10]
    10. Cutting insert (6) according to one of claims 7 to 9, characterized in that the angle between the transfer surface (26) and the surface normal (31) of the flat contact-bearing surface (27b) in the range of 3 ° to 12 °, preferably from 3 ° to 8 °, in particular from 6 ° to 8 °.
    [11]
    11. Cutting insert (6) according to one of claims 7 to 10, characterized in that the cutting insert (6) is sintered in a mold, wherein preferably at least individual edges are slightly rounded and / or at least a part of the shaping with a subsequent processing, in particular with a Senkerodier method is generated.
    [12]
    12. Cutting insert (6) according to one of claims 7 to 11, characterized in that the cutting edge (28) in the direction of the central axis (30) protrudes further than the edge between the contact-bearing surface (27b) and the front surface (23), wherein the angle between the front surface (23) and the surface normal (31) of the contact bearing surface (27b) in the range of 2 ° to 10 °, preferably from 3 ° to 7 °, and the front surface (23) optionally a recess includes.
    [13]
    13. Cutting insert (6) according to any one of claims 7 to 12, characterized in that the bore (29) for screwing a fastening screw (10) at least one of the upper outer surface (25) against the contact-bearing surface (27b) narrowing area includes.
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    同族专利:
    公开号 | 公开日
    CH712311B1|2020-03-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2018-12-28| NV| New agent|Representative=s name: KAMINSKI HARMANN PATENTANWAELTE AG, CH |
    优先权:
    申请号 | 申请日 | 专利标题
    CH00423/16A|CH712311B1|2016-03-31|2016-03-31|Master blade and cutting inserts for a metal circular saw blade and metal circular saw blade.|CH00423/16A| CH712311B1|2016-03-31|2016-03-31|Master blade and cutting inserts for a metal circular saw blade and metal circular saw blade.|
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