• 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:
    cutting insert, and, cutting tool a cutting insert has a head portion and a rear protruding coupling portion from the head portion, along a longitudinal insert geometric axis. the head portion has a base surface at a rear end thereof, defining a base plane, and two main surfaces. a rear surface of the coupling portion is spaced longitudinally from the base surface and a peripheral cylindrical coupling surface extends between the rear surface of the coupling portion and the base surface. a resilience slit has two opposite inner walls converging forward to an inner slit end ending in an inner slit end plane. the plane of the internal slit end is parallel to the base plane and spaced from it by a longitudinal distance. the two walls of the resilience slit form a first acute slit angle between them.
    公开号:BR112015010719B1
    申请号:R112015010719-2
    申请日:2013-10-31
    公开日:2020-10-06
    发明作者:Gil Hecht
    申请人:Iscar Ltd；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The present invention relates to cutting tools, in which a cutting insert is resiliently self-locking and removable in a tool shank retainer, in general, and to a cutting insert having a rear resilience slot for mount on such a retainer, in particular. BACKGROUND OF THE INVENTION
    [002] Cutting tools, and in particular drills, may include a cutting insert or cutting head that is removably attached to a tool retainer, either by a clamping member such as a screw, or by a force of resilience. The cutting insert is attached to the tool retainer prior to orientation when cutting metal, such as drilling. The cutting insert is typically made of a rigid metal, such as cemented carbide or cermet. The tool retainer can be made of steel, or also of a rigid material, such as cemented carbide or cermet. Examples of such cutting tools and cutting inserts are disclosed in US5228812, US5749689, US6485235, US6582164, US7048480, US2010 / 155144 and US2010 / 143059.
    [003] It is an objective of the subject of the present order to provide a new improved drilling cut insert having a single resilience slot in the coupling portion of the same, for resilient self-fixation in a compatible tool shank retainer. SUMMARY OF THE INVENTION
    [004] According to the subject of the present application, a cutting insert is provided having a longitudinal insert geometric axis extending in a direction from front to back, the cutting insert comprising a head portion and a coupling portion.
    [005] The head portion has two opposite major surfaces and a peripheral surface of the head extending between them, the peripheral surface of the head including a base surface at a rear end of the head portion, the base surface defining a plane of base perpendicular to the geometric axis of the insert, each of the larger surfaces intersecting with the base surface at a respective first intersection.
    [006] The coupling portion is protruding backwards from the base surface along the insert geometric axis. The coupling portion has a rear surface spaced from the base surface along the insert geometric axis and a peripheral cylindrical coupling surface extending between them. The peripheral coupling surface intersects with the base surface in a transition area.
    [007] The coupling portion also includes a resilience slit extending from the rear surface in the forward direction, and opening to the peripheral coupling surface. The resilience slit has two opposing inner walls converging in the forward direction to an inner slit end that ends in an inner slit end plane perpendicular to the insert geometric axis.
    [008] The internal slit end plane is spaced from the base plane by a longitudinal distance and the two resilience slit walls form a first acute slit angle between them.
    [009] Still according to the subject of the present application is a cutting tool having a tool shank, with the previously mentioned cutting insert resiliently attached to the tool shank by an interference fitting. BRIEF DESCRIPTION OF THE DRAWINGS
    [0010] For a better understanding of the present invention and to show how it can be carried out in practice, reference will now be made to the attached drawings, in which: Fig. 1 is a perspective view of a cutting tool according to the present invention, in an assembled position; Fig. 2 is a perspective view of the cutting tool of Fig. 1, in an unmounted position; Fig. 3 is a perspective view of the cutting insert of the cutting tool of Fig. 1; Fig. 4 is a side view of the cutting insert of Fig. 3; Fig. 5 is a rear view of the cutting insert of Fig. 3; Fig. 6 is a front view of the cutting tool of Fig-1, in a partially assembled position; Fig. 7 is a front view of the cutting tool of Fig. 1, in the assembled position; Fig. 8 is a cross section of the cutting tool of Fig. 7, along the cutting line VIII-VIII; Fig. 9 is a cross section of the cutting tool of Fig. 7, along the cutting line IX-IX; Fig. 10 is a perspective view of the tool shank of the cutting tool of Fig. 1; Fig. 11 is a partially transparent side view of the cutting tool of Figure 1; Fig. 12 is a cross section of the cutting tool of Fig. 11, along the cutting line XII-XII; Fig. 13 is a cross section of the cutting tool of Fig. 11, along the cutting line XIII-XIII; and Fig. 14 is a side view of the coupling portion of the cutting insert of Figure 3, in its neutral position and in the assembled position.
    [0011] It will be noticed that for simplicity and clarity of illustration, elements shown in the figures were not necessarily drawn to scale. For example, the dimensions of some of the elements can be exaggerated with respect to other elements for clarity, or several physical components can be included in a function block or element. In addition, where appropriate, reference numerals can be repeated within the figures to indicate corresponding or similar elements. DETAILED DESCRIPTION OF THE INVENTION
    [0012] In the following description, various aspects of the present invention will be described. For the purposes of explanation, specific settings and details are defined in order to provide a complete understanding of the present invention. However, it will also be apparent to one skilled in the art that the present invention can be criticized without the specific details presented here. In addition, well-known features can be omitted or simplified so as not to obscure the present invention.
    [0013] Reference is made to Figures 1 and 2, representing a cutting tool 100 according to an embodiment of the present invention. The cutting tool 100 is a rotary cutting tool, such as a drill, having a geometric axis of rotation B. The cutting tool 100 includes a tool shank 150 and a cutting insert 102, the cutting insert 102 mounted in removable in a resilient self-locking manner on tool shank 150. Cutting tool 100 rotates about the rotation axis B in a direction of rotation R.
    [0014] The cutting insert 102 can be of the type used in metal cutting operations and thus can be called a metal cutting insert, which means that the cutting insert can be used for cutting metal, not the cutting insert is necessarily made of metal. In preferred embodiments, cutting insert 102 is formed of hard metal, such as cemented carbide or cermet, and is used for drilling or for other metal cutting operations, sometimes also referred to as chip removal operations.
    [0015] With additional reference to Figures 3 to 5, different views of the cutting insert 102 are shown. The cutting insert 102 has a longitudinal insert geometric axis A extending in a direction from front to back DF, DR. The cutting insert 102 has a head portion 104 and a coupling portion 116. Head portion 104 has a rear end 112 and a front end 136. Head portion 104 includes two opposing larger surfaces 106 and a peripheral surface of head 108 extending between them. The peripheral head surface 108 includes a base surface 110 at the rear end 112 of the head portion 104. The base surface 110 defines a base plane PI extending perpendicular to the insert geometric axis A. Each of the larger surfaces 106 intersects with the base surface 110 at a respective first intersection 114.
    [0016] The peripheral head surface 108 additionally includes a front surface 134 at the front end 136 of the head portion 104. Each of the larger surfaces 106 intersects with the front surface 134. A portion of each such intersection forms a respective cutting edge. major 138 at the front end 136 of the head portion 104. An insert track surface 107 extends backwards from each of the cutting edges 138, on the respective major surface 106.
    [0017] The base portion 110 includes two transverse contact surfaces] of insert 123, extending perpendicular to, and symmetrically around the geometric axis of insert A. Each of the larger surfaces 106 additionally includes a radial contact surface insert 125, extending along the insert geometric axis A. Each insert radial contact surface 125 extends from the peripheral head surface 108 to the insert geometric axis A and the base surface 110, such that two insert radial contact surfaces 125 are arranged symmetrically around the insert geometric axis A. A retaining edge 133 extends circumferentially from the rear end of each of the insert radial contact surfaces 125 along of a portion of the respective insert transverse contact surface 123.
    [0018] The coupling portion 116 is protruding backwards from the base surface 110 along the insert geometric axis A. The coupling portion 116 comprises a rear surface 118 spaced from the base surface 110. A surface peripheral cylindrical coupling 120 extends between the rear surface 118 and the base surface 110, forming a cylindrical envelope for the coupling portion 116. The peripheral coupling surface 120 is coupled with the base surface 110 in a circumferential transition area 122. The transition area 122 is spaced from the first intersections 114. Therefore, as shown in Figure 5, the transition area 122 is entirely surrounded by the base surface 110 and has a substantially circular boundary 132.
    [0019] Coupling portion 116 also comprises a resilience slot 124 extending from the rear surface 118 in the forward direction DF, opening to the peripheral coupling surface 120. Resilience slot 124 has two opposite internal walls 131 , converging in the forward direction DF to an internal slit end 126 that ends in an internal slit end plane P2 extending perpendicular to the insert geometric axis A. The internal slit end plane P2 is spaced from the base plane Pl over a longitudinal distance D, such that the resilience slot 124 ends at the coupling portion 116 and does not further extend into the head portion 104 of the cutting insert 102. In this way, all resilient self-fastening of the cutting insert 102 occurs at the portion coupling 116, and in particular adjacent the rear surface 118 thereof. This provides stability for the head portion 104, and in particular for the transition area 122, which is particularly susceptible to the lateral forces acting on the cutting insert 102 during machining operations. In addition, due to the longitudinal distance D, a cross-section of the coupling portion 116 taken perpendicular to the insert geometric axis A, between the inner slot end plane P2 and the base plane Pl, has a complete undivided cross section 128 ( for example, a circular or elliptical cross section). This is shown in the cross section of Figure 12, as will be elaborated here below.
    [0020] The rear surface 118 of the coupling portion 116 defines an end plane P3 extending perpendicular to the insert geometric axis A. The resilience slot 124 has a longitudinal slot length H between the end plane P3 and the plane of inner end of slit P2. The longitudinal distance D is typically less than the longitudinal slit length H.
    [0021] Resilience slot 124 divides coupling portion 116 into two coupling legs 117. As shown in Figure 5, a plane of resilience slot Ps passes through resilience slot 124, substantially centrally between the legs of coupling 117, such that coupling legs 117 are mirror-symmetrical about the plane of the resilience slot Ps. The plane of the resilience slit Ps includes the insert geometric axis A. The insert radial contact surfaces 125 define first and second radial contact planes PAI, PA2, which are parallel to each other and to the insert geometric axis A. The plane the resilience gap Ps is perpendicular to the first and second radial contact planes PAI, PA2. The resilience slot 124 allows the coupling portion 116 to be elastically deformed, such that each of the coupling legs 117 approaches the insert geometric axis A, when sufficient force is applied on the peripheral coupling surface 120 towards the resilience crack plane Ps. Figure 4 represents a side view of the cutting insert 100 seen along the plane of the resilience slot Ps (that is, perpendicular to the geometric axis of insert A), when the cutting insert 100 is in its neutral position (that is, not mounted for cutting tool retainer 150). This side view shows that the two walls 131 of the resilience slot 124 form a first acute slot angle between them, expanding from the inner end of the slot 126 to the rear surface 118. This forms a V-shape behind the slot of resilience 124. As also seen in Figs. 4 and 14, each coupling leg 117 has a thickness T in a direction perpendicular to the plane of the resilience slot Ps, thickness T which decreases in the direction towards the rear surface 118.
    [0022] As shown in Figure 2, the tool shank 150 is generally cylindrical in shape, having a front end of shank 154 with a receiving portion 152. With further reference to Figure 10, the tool shank 150 is represented in a front perspective view. The receiving portion 152 includes a rearmost base receiving portion 158, and a peripheral receiving portion surface 156. The peripheral receiving portion surface 156 extends from the rearmost base receiving portion 158 in the forward direction DF , circumferentially about the geometric axis of rotation B. The peripheral surface of the receiving portion 156 may have a substantially cylindrical cross section. Alternatively, the peripheral surface of the receiving portion 156 may have another shape, which is not necessarily cylindrical. Referring to Figures 12 and 13, the peripheral surface of the receiving portion 156 is shown to have a substantially cylindrical cross section.
    [0023] The tool shank 150 additionally includes two shank radial contact surfaces 160, located at the front end of shank 154, and extending parallel to the axis of rotation B. The shank radial contact surfaces 160 are arranged in a manner symmetrical about the axis of rotation B. Tool shank 150 also includes two shank cross contact surfaces 162, each extending from a respective shank radial contact surface 160, perpendicular to the axis of rotation B. A retaining recess 164 is formed between each of the stem cross contact surfaces 162 and the respective radial contact surface 160, to receive one of the retaining edges 133 of the cutting insert 102.
    [0024] Tool shank 150 also includes two portions of shank rail 157 arranged symmetrically around the circumference of tool shank around the geometric axis of rotation B. During metal cutting operations, metal chips removed from of the workpiece are directed to flow from the cutting edges 138 of the cutting insert 102 along the insert chute surfaces 107, and additionally to the stem chute portions 157, thereby being evacuated from the area cutting.
    [0025] Reference is made in addition to Figures 6 and 7, representing top views of the cutting tool 100 in a partially assembled position and assembled position, respectively. Figures 8 and 9 are cross sections of the cutting tool 100 in the assembled position, according to the cutting lines VIII-VIII and IX-IX, respectively, noted in Figure 7. The cross section of Figure 8 passes through the intersections of the peripheral surface of head 108 with insert radial contact surfaces 125, and through insert geometry axis A. Cut line IX-IX includes insert geometry axis A, and extends parallel to PAI radial contact planes, PA2-
    [0026] The cutting insert 102 is configured to be mounted on the tool shank 150 and fixed securely in it so as to reach the assembled position shown, for example, in Figs. 1 and 7. The assembled position is suitable for employing the cutting tool 100 in metal cutting operations, such as drilling. In the dismounted position shown in Fig. 2, the cutting insert 102 and the tool shank 150 are separated from each other. With the insert geometric axis A aligned with the rotation axis B, the cutting insert 102 and the tool shank 150 are placed together until the coupling portion 116 is located in the receiving portion 152, in a partially assembled position ( Figure 6). From the partially assembled position, the cutting insert 102 is rotated about the insert geometric axis A, with respect to the tool shank 150, in a mounting direction R ', opposite to the direction of rotation R, until reaching the position assembled shown, for example, in Figs. 2 and 7. In this position, the cutting insert 102 is resiliently attached to the stem front end 154 by an interference fit applied between the peripheral coupling surface 120 and the peripheral surfaces of the receiving portion 156. In the partially assembled position and in the assembled position, the insert geometric axis A coincides with the rotational axis B. In addition, in the partially assembled position and in the assembled position, the coupling portion 116 of the cutting insert 102 is entirely confined within the receiving portion 152 of the tool shank 150 (i.e., the coupling portion is not visible when looking at the mounted cutting tool 100).
    [0027] Reference is made in addition to Figure 11, representing a side view of the cutting tool 100 of Figure 2. The outline of the hidden parts of the cutting insert 102, in this view, is represented in the dotted lines. Figures 12 and 13 represent cross sections of the cutting tool 100, according to the cutting lines XII-XII and XIII - XIII, respectively, noted in Figure 11. The cutting line of Figure 12 passes between the base surface 110 and the internal slit end 126 of the cutting insert 102, perpendicular to the geometric axis of the insert A. The cross section of the coupling portion 116, in this longitudinal location, is the complete undivided cross section 128.
    [0028] The cross section of Figure 13 passes forward from, and adjacent to the rear surface 118 of the cutting insert 102, perpendicular to the geometric axis of the insert A. This cross section demonstrates the interference fit between the peripheral coupling surface. 120 and the peripheral surface of the receiving portion 156.
    [0029] In the assembled position, each of the insert radial contact surfaces 125 of the cutting insert 102 contacts a respective of the shank radial contact surfaces 160 of the tool shank 150. Each of the insert cross contact surfaces 123 contacts a respective of the shank cross contact surfaces 162. In addition, in the assembled position, each trough portion 157 of the tool shank 150 forms a continuous extension of the respective insert trough surface 107 of the cutting insert 102. The retaining edges 133 of the cutting insert 102 are received within retaining undercuts 164 of the tool shank 150. If a forward force is applied to the cutting insert 102, acting to pull the cutting insert 102 out of the tool shank 150, the retaining edges 133 are stopped by the retaining recesses 164, thereby preventing the cutting insert 102 from being pulled. In the assembled position, the rear surface 118 of the cutting insert 102 is spaced from the base receiving portion 158, as shown in the cross sections of Figures 8 and 9.
    [0030] The coupling portion 116 and the receiving portion 152 are designed to have an interference fit between them so that in the assembled position the coupling portion 116 is mounted on the receiving portion 152. Such an interference fit is achieved by diameter of the peripheral coupling surface 120 being greater than the diameter of the peripheral surface of the receiving portion 156, at least in a portion of the circumference thereof. The peripheral coupling surface 120 can include two opposite indentations 130 arranged symmetrically about the geometric axis of insert A. The indentations 130 are formed on the peripheral coupling surface 120, and extend from the rear surface 118 in the forward direction. DF. Figure 13 shows that the indentations 130 reduce the diameter of the peripheral coupling surface 120, forming an elliptical cross section 129 of the coupling portion 116.
    [0031] The resilience slot 124 provides elasticity for the coupling portion 116 allowing the diameter of the peripheral surface of the coupling portion 120 (i.e., the diameter at any cross section of the coupling portion 116 taken perpendicular to the insert geometric axis. A), to be made smaller by applying an interference force from both sides of the resilience slit 124. Applying such a force, the coupling portion 116 is elastically deformed and the coupling legs 117 are propelled towards each other , and for the plane of the resilience gap Ps. A resilience force impels the coupling legs 117 away from their original neutral position, thereby pressing the peripheral coupling surface 120 against the peripheral surfaces of the receiving portion 156.
    [0032] In the embodiment shown in the drawings, each of the indentations 130 extends on both sides of the resilience slit 124, over the opening of the resilience slit 124 for the peripheral coupling surface 120. This is to ensure that the fitting of interference occurs such that the interference force is applied perpendicular to the plane of the resilience slot Ps, in order to press the coupling legs 117 towards the plane of the resilience slot Ps.
    [0033] When the cutting tool 100 is used in cutting metal, it rotates in the direction of rotation R, and a reverse force is applied to the cutting insert 102, in the opposite direction R '. This reverse force further assists in keeping the cutting insert 102 fixed within the tool shank 150 during operation.
    [0034] The cutting insert 102 can be removed from the tool shank 150, for example, when the cutting edges 138 have been worn and the cutting insert 102 needs to be replaced. In order to remove the cutting insert 102, it is rotated about the insert geometric axis A, with respect to the tool shank 150, in the direction of rotation R, until reaching the partially assembled position (Fig. 6). Then, the cutting insert 102 and the tool shank 150 are pushed apart until they reach the disassembled position (Fig. 2).
    [0035] Reference is made in addition to Figure 14, schematically representing partial side views of the coupling portion 116, taken along the plane of the resilience slot Ps and perpendicular to the insert geometric axis A, when the coupling portion 116 is in the neutral position (shown in solid lines) and the mounted position (shown in dotted lines). The displacement towards the plane of the resilience slot Ps in the coupling portion 116 is evident when comparing the assembled position with the neutral position. As shown in Figure 14, and according to the results of mechanical analysis of the cutting tool 100, the largest displacement was recorded on, or immediately adjacent to the rear surface 118, on each of the coupling legs 117. The displacement decreased when approaching from the inner end of the slit 126, and no offset was recorded between the inner end of the slit 126 and the base surface 110, and in particular in the transition area 122.
    [0036] Coupling portion 116 has a coupling portion width W extending between the peripheral coupling surface 120, on opposite sides of the insert geometric axis A. In the neutral position, the coupling portion width W is substantially constant , along the coupling portion 116. In the assembled position, the width of the coupling portion W decreases when approaching the rear surface 118 from the inner end of the slot 126. The width of the coupling portion W remains constant between the inner end slit 126 and the transition area 122, both in the mounted and neutral positions.
    [0037] As noted above, the inner slot end 126 is spaced from the base surface 110, (i.e., the inner slot end plane P2 is spaced from the base plane PI), making the cross section of the portion of coupling 116 in that region, the undivided cross section completes 128. In addition, in the neutral position, the two walls 131 of the resilience slit 124 form the first acute slit angle expanding to the rear surface 118, such that the thickness T of each coupling leg 117 taken in a direction perpendicular to the plane of the resilience slot Ps narrows towards the rear surface 118. In the assembled position, the coupling legs 117 are offset from each other on opposite sides of the plane of the resilience slot Ps, making with the two walls 131 of the resilience slot 124 forming a second slot angle a2 between them, the second slot angle a2 being less than the first acute slot angle a. Due to these attributes, the displacement to the plane of the resilience slot Ps is the largest on the rear surface 118, while eliminated from the transition area 122 and its vicinity, thereby providing additional durability for the transition area 122.
    [0038] In a particular case of lateral forces acting on a cutting insert during machining operations (for example, angular drilling), the transition area can be particularly susceptible and prone to breakage and other mechanical damage. The suggested design of the cutting insert 102 according to the present invention provides better strength and durability of the transition area 122, thereby preventing such damage.
    [0039] While the present invention has been described with reference to one or more specific modalities, the description is intended to be illustrative as a whole and should not be construed as limiting the invention to the modalities shown. It is realized that various modifications can occur to those skilled in the art which, while not specifically shown here, are nevertheless within the scope of the invention.
    权利要求:
    Claims (15)
    [0001]
    1. Cutting insert (102), having a longitudinal insert geometric axis (A) extending in a direction from the front (DF) to the back (DR), comprising: a head portion (104) having two opposite major surfaces ( 106) and a peripheral head surface (108) extending between them, the peripheral head surface (108) including a base surface (110) at a rear end (112) of the head portion (104), the surface of base (110) defining a base plane (Pl) perpendicular to the insert geometric axis (A); and a coupling portion (116) protruding backwards from the base surface (110) along the insert geometric axis (A), the coupling portion (116) comprising: a rear surface (118) spaced from the base surface (110) along the insert geometric axis (A) and a peripheral cylindrical coupling surface (120) extending between the rear surface (118) and the base surface (110); and a resilience slot (124) extending from the rear surface (118) in the forward direction (DF) and opening to the peripheral coupling surface (120), the resilience slot (124) having two opposite inner walls (131); characterized by the fact that internal walls (131) converge in the forward direction (DF) to an internal slot end (126) that ends in a plane of internal slot end (P2) perpendicular to the geometric insert axis (A), where: the inner slit end plane (P2) is spaced from the base plane (Pl) by a longitudinal distance (D); and the two inner walls (131) of the resilience slot (124) form a first acute slot angle (a1) between them.
    [0002]
    Cutting insert (102) according to claim 1, characterized in that the rear surface (118) defines an end plane (P3) perpendicular to the geometric insert axis (A) and the resilience slot (124 ) has a longitudinal slit length (H) between the end plane (P3) and the inner slit end plane (P2), and the longitudinal distance (D) is less than the longitudinal slit length (H ).
    [0003]
    Cutting insert (102) according to any one of claims 1 to 2, characterized in that a cross section of the coupling portion (116) taken perpendicular to the insert geometric axis (A) between the inner end plane (P2) and the base plane (Pl), is a complete undivided cross section (128).
    [0004]
    Cutting insert (102) according to any one of claims 1 to 3, characterized in that the peripheral coupling surface (120) includes two opposing indentations (130) arranged symmetrically about the geometric axis of the insert (A ).
    [0005]
    Cutting insert (102) according to any one of claims 1 to 4, characterized in that the peripheral coupling surface (120) intersects with the base surface (110) in a transition area (122) having a circular boundary (132), completely surrounded by the base surface (110).
    [0006]
    Cutting insert (102) according to any one of claims 1 to 5, characterized in that in a side view of the coupling portion (116) taken perpendicular to the insert geometric axis (A), a portion width coupling (W) extends between the peripheral coupling surface (120), on both sides of the resilience slot (124), and in a neutral position of the coupling portion (116) the width of the coupling portion (W) is constant, along the coupling portion (116).
    [0007]
    Cutting insert (102) according to any one of claims 1 to 6, characterized in that the peripheral head surface (108) additionally includes a front surface (134) at a front end (136) of the portion of head (104), wherein a portion of the intersection of each of the larger surfaces (106) with the front surface (134) forms a respective larger cutting edge (138).
    [0008]
    Cutting insert (102) according to any one of claims 1 to 7, characterized in that each of the larger surfaces (106) has an insert radial contact surface (125) extending from the peripheral surface head (108) for the insert geometric axis (A), and the base surface (110), the insert radial contact surfaces (125) defining first and second radial contact planes (PAI, PA2), parallel between itself and the insert geometric axis (A), and where the resilience slot (124) divides the coupling portion (116) into two coupling legs (117), and a plane of the resilience slot (Ps) passes from centrally between the coupling legs (117) and includes the insert geometric axis (A), the plane of the resilience slit (Ps) which is perpendicular to the first and second radial contact planes (PAI, PA2), where each coupling leg (117) has a thickness (T) in a direction perpendicular to the plane of the resilience (Ps); and the thickness (T) of each coupling leg (117) decreases towards the rear surface (118).
    [0009]
    Cutting insert (102) according to any one of claims 1 to 8, characterized in that each of the larger surfaces (106) has an insert radial contact surface (125) extending from the peripheral surface head (108) for the insert geometric axis (A) and the base surface (110), the base surface (110) has two insert insert contact surfaces (123), extending perpendicular to, and in a manner symmetrical about the geometric insert axis (A), and the cutting insert (102) additionally includes two retaining edges (133), each extending circumferentially from the rear end of a respective radial contact surface of insert (125), over a portion of a respective insert transverse contact surface (123).
    [0010]
    10. Cutting tool (100) having a geometric axis of rotation (B) extending in a direction from the front (DF) to the rear (DR), and around which the cutting tool (100) rotates in a direction of rotation (R), the cutting tool (100) characterized by the fact that it comprises: a tool shank (150) having a front shank end (154) with a receiving portion (152), the receiving portion (152 ) comprising a peripheral surface of the receiving portion (156) extending circumferentially around the geometric axis of rotation (B); and a cutting insert (102) as defined in claim 1, wherein: in a mounted position of the cutting tool (100), the cutting insert (102) is resiliently secured to the tool shank (150) by a interference fit applied between the peripheral coupling surface (120) of the cutting insert (102) and the peripheral surface of the receiving portion (156).
    [0011]
    Cutting tool (100) according to claim 10, characterized in that: the resilience slot (124) divides the coupling portion (116) into two coupling legs (117); and in the assembled position, the coupling legs (117) resiliently approach the insert geometric axis (A), and the inner walls (131) of the resilient slot (124) from a second slot angle (a2) between the same, the second slit angle (a2) being smaller than the first acute slit angle (al).
    [0012]
    Cutting tool (100) according to any one of claims 10 to 11, characterized in that the peripheral surface of the receiving portion (156) is cylindrical, wherein the receiving portion (152) includes a base from the most rear receiving portion (158), and in the assembled position, the rear surface (118) is spaced from the base of the most rear receiving portion (158), and in that in the assembled position, the coupling portion (116) of the insert cutting edge (102) is entirely confined to the receiving portion (152) of the tool shank (150).
    [0013]
    13. Cutting tool (100) according to any one of claims 10 to 12, characterized in that: each of the larger surfaces (106) has an insert radial contact surface (125) extending from the surface peripheral head (108) for the insert geometric axis (A) and the base surface (110), the tool shank (150) additionally includes two shank radial contact surfaces (160), located at the front shank end (154), extending parallel, and arranged symmetrically around the geometric axis of rotation (B), and the tool shank (150) additionally includes two shank cross contact surfaces (162), each extending to from a respective radial contact surface of the stem (160), circumferentially and perpendicular to the geometric axis of rotation (B), the base portion (110) additionally includes two transverse insert contact surfaces (123), if extend from perpendicular to, and symmetrically around the geometric axis of insert (A), and in the assembled position, each head radial contact surface (125) contacts a respective stem radial contact surface (160).
    [0014]
    Cutting tool (100) according to any one of claims 10 to 13, characterized in that: the cutting insert (102) additionally includes two retaining edges (133), each extending circumferentially to from the rear end of a respective insert radial contact surface (125), along a portion of a respective insert transverse contact surface (123), and the tool shank (150) additionally includes two retaining recesses ( 164), each extending circumferentially from a respective transverse rod contact surface (162), to receive the retaining edges (133) on it, in the assembled position.
    [0015]
    Cutting tool (100) according to any one of claims 10 to 14, characterized in that: in the side view of the coupling portion (116) a width of the coupling portion (W) extends between the peripheral surface coupling (120), on both sides of the resilience slot (124), in a neutral position of the coupling portion (116) the width of the coupling portion (W) is constant, along the coupling portion (116) , and in the assembled position, the coupling portion width (W) decreases when approaching the rear surface (118) from the inner slot end (126).
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    IL243754A|2019-07-31|Detachable cutting tool segment with resilient clamping and cutting tool therefor
    同族专利:
    公开号 | 公开日
    RU2015125253A|2017-01-10|
    BR112015010719A2|2017-07-11|
    DE112013005653T5|2015-08-20|
    JP2015535493A|2015-12-14|
    PT2922653T|2018-06-05|
    JP6434418B2|2018-12-05|
    ES2678871T3|2018-08-20|
    EP2922653A1|2015-09-30|
    WO2014080395A1|2014-05-30|
    KR20150088795A|2015-08-03|
    US8882413B2|2014-11-11|
    CA2891295C|2018-02-13|
    CN104853868A|2015-08-19|
    US20140147224A1|2014-05-29|
    KR101883539B1|2018-07-30|
    RU2635597C2|2017-11-14|
    CN104853868B|2018-01-02|
    CA2891295A1|2014-05-30|
    EP2922653B1|2018-04-25|
    PL2922653T3|2018-08-31|
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    法律状态:
    2018-11-21| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-11-19| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-07-07| B09A| Decision: intention to grant|
    2020-10-06| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 31/10/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/684,947|US8882413B2|2012-11-26|2012-11-26|Cutting tool and cutting insert with a rearward resilience slit|
    US13/684,947|2012-11-26|
    PCT/IL2013/050890|WO2014080395A1|2012-11-26|2013-10-31|Cutting tool and cutting insert with a rearward resilience slit|
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