Chamfer cutting tools for cutting tools

Abstract

A cutting tool (20) includes a tool body (24) having an outer tool receiving cavity (58) disposed peripherally and an inner tool receiving cavity (46) disposed internally, wherein a cutting tool (22) is resiliently clamped in the inner tool receiving cavity. The tool body (24) includes a through groove (30) at least partially defined in the circumferential direction by a groove circumferential surface (32). An elastic clamping member (36) extends into the through groove (30). The inner tool receiving cavity (58) is formed by the elastic clamping member (36) and a groove cavity portion (34) of the groove circumferential surface (32). The chamfering cutting tool (22) can be held by the elastic clamping member (36) without using an additional separate clamping device.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is a divisional application of Chinese invention patent application No. 201880011921.4, which entered the Chinese national phase on August 14, 2019 and is entitled "Tool body having an internal tool receiving cavity with an elastic clamping member, a cutting tool and a chamfering cutting tool for a cutting tool". Technical Field

[0003] The subject matter of the present application generally relates to cutting tools having a tool body with an outer tool receiving cavity and an inner tool receiving cavity for releasably retaining a chamfer cutting tool therein, and particularly to such a tool body having a resilient clamping member for resiliently clamping the chamfer cutting tool. Background Art

[0004] The cutting tool may have a tool body which may be provided with an outer tool receiving cavity for holding a grooving / cutting-off tool therein and an inner tool receiving cavity for releasably holding a chamfering cutting tool therein by a clamping member. Examples of such cutting tools are disclosed in, for example, US 9,162,296 and WO 1999 / 028073, in which the clamping member is a retaining screw.

[0005] Other cutting tools may be provided with a cutting tool that performs a dual cutting action. Such a cutting tool is provided with a cutting portion for cutting off a workpiece and a chamfering portion for chamfering the workpiece after the cutting process is completed. Examples of such cutting tools are disclosed in, for example, WO2008 / 140191.

[0006] It is an object of the present subject matter to provide a new and improved tool body.

[0007] It is an object of the subject matter of the present application to provide a tool body having an internal tool receiving cavity disposed therein for releasably retaining a chamfer cutting tool therein by a resilient clamping member.

[0008] It is an object of the subject matter of the present application to provide a new and improved chamfer cutting tool.

[0009] It is an object of the subject matter of the present application to provide a new and improved cutting tool. Summary of the invention

[0010] According to a first aspect of the subject matter of the present application, there is provided a tool body, comprising:

[0011] two opposing main body side surfaces and a main body peripheral surface extending therebetween;

[0012] a peripherally disposed external tool receiving cavity; and

[0013] An internally disposed internal tool receiving cavity includes a resilient clamping member and is configured to resiliently retain a chamfer cutting tool therein without the use of an additional separate clamping device.

[0014] According to a second aspect of the subject matter of the present application, there is provided a non-indexable chamfer cutting tool having a tool longitudinal axis defining a forward direction to a rearward direction, the cutting tool comprising:

[0015] Opposing cutter front and rear surfaces and a cutter peripheral surface extending therebetween, the cutter peripheral surface including a cutter top surface;

[0016] a non-cutting edge formed by the intersection of the tool nose surface and the tool top surface; and

[0017] at least one laterally projecting chamfered portion comprising a chamfered cutting edge; wherein:

[0018] In a top view of the tool, the non-cutting edges extend on both sides of a vertical plane containing the longitudinal axis of the tool and passing through the top surface of the tool; and

[0019] The tool top surface includes a tool top raised portion and a tool top lowered portion, the tool top raised portion includes a tool top abutment surface, the tool top lowered portion includes a tool top non-abutment surface, and the tool top lowered portion extends from the tool rear end surface toward the tool top raised portion.

[0020] According to a third aspect of the subject matter of the present application, there is provided a cutting tool comprising:

[0021] A tool body of the above type; and

[0022] A cutting tool of the above type is resiliently clamped in the internal tool receiving cavity by means of a resilient clamping member.

[0023] According to a fourth aspect of the subject matter of the present application, there is provided a non-indexable chamfer cutting tool having a tool longitudinal axis defining a forward direction to a rearward direction, the cutting tool comprising:

[0024] Opposing cutter front and rear surfaces and a cutter peripheral surface extending therebetween, the cutter peripheral surface including a cutter top surface;

[0025] a vertical plane containing the longitudinal axis of the cutter and passing through the top surface of the cutter;

[0026] a non-cutting edge formed by the intersection of the tool nose surface and the tool top surface; and

[0027] at least one laterally projecting chamfered portion comprising a chamfered cutting edge; wherein:

[0028] Each chamfered portion is located at a front end portion of the cutting tool;

[0029] In a top view of the tool, the non-cutting edges extend on both sides of a vertical plane containing the longitudinal axis of the tool; and

[0030] In a top view of the tool, the overall length of the tool taken along the tool longitudinal axis is greater than the overall width of the tool taken perpendicular to the vertical plane.

[0031] It should be understood that the above is an overview and that the features described below may be used in any combination with the subject matter of the present application, for example, any of the following features may be used with a tool body and / or a cutting tool and / or a cutting tool:

[0032] A resilient clamping member may be disposed between the internal tool receiving cavity and the resilient slit.

[0033] The resilient clamping member may be a cantilever having a clamping member fixed end and a clamping member free end.

[0034] The internal tool receiving cavity may extend along a cavity longitudinal axis, the longitudinal axis passing through the cavity opening end and the cavity distal end, the cavity opening end being closer to the outer peripheral surface of the body than the cavity distal end. The internal tool receiving cavity may transition to a tool insertion clearance region at the cavity opening end. The tool insertion clearance region may have a dimension measured in a direction perpendicular to the cavity longitudinal axis that is larger than the dimension of the internal tool receiving cavity.

[0035] The tool body may include a through groove that is open toward the two body side surfaces and is at least partially defined in the circumferential direction by the groove circumferential surface. The resilient clamping member may extend into the through groove. The internally arranged internal tool receiving cavity may be formed by the resilient clamping member and the groove cavity portion of the groove circumferential surface.

[0036] The resilient clamping member may be connected to the groove circumferential surface.

[0037] The through groove may be spaced apart from the outer peripheral surface of the body.

[0038] The through groove may be open toward the outer peripheral surface of the main body.

[0039] The tool body may have a body central axis intersecting the two body side surfaces. The two body side surfaces may be planar and perpendicular to the body central axis.

[0040] The tool body may be disc-shaped and have a body central axis intersecting the two body side surfaces. The tool body may rotate around the body central axis in a rotational direction. The inner tool receiving cavity is closer to the body central axis than the outer tool receiving cavity.

[0041] The tool body may be a cutting insert and have a body central axis intersecting the two body side surfaces. The tool body may be mirror symmetrical about a transverse plane containing the body central axis. The inner tool receiving cavity is closer to the transverse plane and the body central axis than the outer tool receiving cavity.

[0042] The cutting tool may comprise exactly two chamfered portions opposite each other, each chamfered portion having a chamfered cutting edge.

[0043] The two chamfer cutting edges may be spaced apart and extend rearwardly from a non-cutting edge, the non-cutting edge being formed by the intersection of the tool front end surface and the tool top surface.

[0044] The top raised portion of the cutter may extend from the front end surface of the cutter.

[0045] The tool top raised portion and the tool top lowered portion may be connected by a tool top intermediate surface, which may be oriented transversely to the tool top raised portion and the tool top lowered portion.

[0046] The cutter top abutment surface may extend to the cutter top intermediate surface.

[0047] The cutter top abutment surface may be generally V-shaped in axially vertical cross-section.

[0048] Each chamfered portion may be located at a front end portion of the cutting tool.

[0049] The cutter top non-abutment surface may be planar.

[0050] The tool top raised portion has a tool top raised portion length. The tool top lowered portion has a tool top lowered portion length. The tool top raised portion length is less than the tool top lowered portion length.

[0051] In a top view of the tool, the overall length of the tool along the tool longitudinal axis may be greater than the overall width of the tool taken perpendicular to the vertical plane.

[0052] The resilient clamping member may include a clamping abutment surface. The recessed cavity portion may include a cavity abutment surface opposite to the clamping abutment surface. The tool peripheral surface may include a tool bottom surface opposite to the tool top surface. The tool bottom surface may include a tool bottom abutment surface. The tool bottom abutment surface may abut the cavity abutment surface. The clamping abutment surface elastically engages the tool top abutment surface.

[0053] The knife top non-abutment surface may be spaced apart from the resilient clamping member. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to better understand the present application and to show how the invention may be implemented in practice, reference will now be made to the accompanying drawings, in which:

[0055] Figure 1 is a perspective view of a cutting tool according to the present application;

[0056] Figure 2 The embodiment according to the present application is shown Figure 1 An exploded perspective view of the through groove of the cutting tool shown;

[0057] Figure 3 yes Figure 2 A side view of the through groove in FIG.

[0058] Figure 4 is a side view of a through groove according to another embodiment of the present application;

[0059] Figure 5 yes Figure 1 A side view of the internal cutting tool in FIG.

[0060] Figure 6 yes Figure 5 A top view of the cutting tool in FIG.

[0061] Figure 7 When the tool receiving cavity is in the open position Figure 3 A similar view as shown; and

[0062] Figure 8 is a side view of another cutting tool according to the present application.

[0063] It should be understood that for ease and clarity of illustration, the elements shown in the figures are not necessarily drawn to scale. For example, for clarity, the size of some elements may be exaggerated relative to other elements, or multiple physical components may be included in a functional block or element. In addition, reference numerals may be repeated in the drawings to indicate corresponding or similar elements where deemed appropriate. DETAILED DESCRIPTION

[0064] In the following description, various aspects of the subject matter of the present application will be described. For the purpose of illustration, specific construction and details are fully described in detail to provide a thorough understanding of the subject matter of the present application. However, it will also be clear to those skilled in the art that the subject matter of the present application can be implemented without the specific construction and details provided herein.

[0065] First note Figure 1, a cutting tool 20 is shown, which illustrates one aspect of the present application and has a tool center axis A. Figure 1 In the non-limiting example shown, the cutting tool 20 is a milling tool. In particular, the milling tool is a rotary slotting cutter suitable for slotting operations and can rotate about a tool center axis A in a rotation direction R. The cutting tool 20 can present rotational symmetry about the tool center axis A. The cutting tool 20 has a cutting tool 22, which can typically be made of cemented carbide. The cutting tool 20 has a tool body 24, which can typically be made of steel.

[0066] It should be noted that the term "slot milling cutter" used in this article can be replaced by other terms suitable for such cutting tools in the field of metal cutting, for example, "slot milling cutter", "grooving cutter", "grooving cutter", "grooving cutter", "grooving cutter", "slot type milling cutter", "side milling cutter", "disc milling cutter", etc.

[0067] Now refer to Figure 1 . The tool body 24 has a body center axis B that coincides with the tool center axis A. The tool body 24 includes two opposing body side surfaces 26 and a body peripheral surface 28 extending therebetween. The body center axis B intersects the two body side surfaces 26. The body center axis B extends through a central portion of the body side surfaces 26. According to some embodiments of the subject matter of the present application, the two opposing body side surfaces 26 may be planar and perpendicular to the body center axis B. The tool body 24 may be disc-shaped, and the body center axis B forms a rotation axis about which the tool body 24 may rotate in a rotation direction R.

[0068] The tool body 24 includes an external tool receiving cavity 58 adjacent the body peripheral surface 28. That is, the external tool receiving cavity 58 is peripherally disposed and is suitable for use with, for example, a slotting tool because its cutting edge is accessible to the workpiece.

[0069] Now refer to Figure 2 and Figure 3, the tool body 24 includes a through groove 30. The through groove 30 is at least partially defined in the circumferential direction by a groove circumferential surface 32. The groove circumferential surface 32 extends between the two body side surfaces 26 and is open toward the two body side surfaces 26. According to some embodiments of the subject matter of the present application, the through groove 30 may also be open toward the body outer peripheral surface 28. In such a configuration, the groove circumferential surface 32 intersects with the body outer peripheral surface 28 and only partially defines the through groove 30. In other words, the through groove 30 is "open". However, according to some other embodiments of the subject matter of the present application, the through groove 30 may be spaced apart from the body outer peripheral surface 28. In such a configuration, the groove circumferential surface 32 does not intersect with the body outer peripheral surface 28 and completely defines the through groove 30. In other words, the through groove 30 is "closed". Advantageously, when the through groove 30 is closed, the periphery of the cutting tool 20 is more rigid.

[0070] like Figure 3 and Figure 4 As best shown in the figure, the groove peripheral surface 32 includes a groove cavity portion 34. The tool body 24 also includes a resilient clamping member 36, which is capable of elastic displacement relative to the groove cavity portion 34. The resilient clamping member 36 extends into the through groove 30. According to some embodiments of the subject matter of the present application, the resilient clamping member 36 can be a cantilever having a clamping member fixed end 38 and a clamping member free end 40. Therefore, it can be considered that the resilient clamping member 36 protrudes into the through groove 30. The resilient clamping member 36 can be connected to the groove peripheral surface 32. The resilient clamping member 36 can be integrally formed with the tool body 24 to have a one-piece integral construction therewith. The resilient clamping member 36 can be defined on one side by a resilient slit 42 to allow elastic displacement. The resilient clamping member 36 includes a clamping abutment surface 44 for elastically engaging a corresponding surface on the cutting tool 22.

[0071] The tool body 24 includes an internal tool receiving cavity 46 for releasably retaining the chamfer cutting tool 22 therein. Generally speaking, the internal tool receiving cavity 46 is closer to the body center axis B than the external tool receiving cavity 58. That is, the internal tool receiving cavity 46 is internally disposed and is not suitable for use, for example, with a slot milling tool because its cutting edge is not accessible to the workpiece. However, such an internal tool receiving cavity 46 is suitable for a chamfer cutting tool for chamfering a pre-cut slot (described below).

[0072] The internal tool receiving cavity 46 is formed by the resilient clamping member 36 and the groove cavity portion 34. The internal tool receiving cavity 46 extends along the cavity longitudinal axis P. The internal tool receiving cavity 46 includes a cavity opening end 48 and an opposite cavity distal end 50, and the cavity opening end 48 is closer to the body outer peripheral surface 28 than the cavity distal end 50. The cavity longitudinal axis P passes through the cavity opening end 48 and the cavity distal end 50.

[0073] According to some embodiments of the subject matter of the present application, when the through groove 30 is closed, the internal tool receiving cavity 46 can be spaced apart from the body outer peripheral surface 28. More specifically, as shown in FIG. Figure 3 As shown, the internal tool receiving cavity 46 can be separated from the main body outer peripheral surface 28 by a portion of the main body side surface 26. According to some other embodiments of the subject matter of the present application, when the through groove 30 is opened, the internal tool receiving cavity 46 can be formed on the main body outer peripheral surface 28. More specifically, as shown in FIG. Figure 4 As shown, the through groove 30 may be formed in the groove circumferential surface 32 .

[0074] The groove cavity portion 34 extends from the cavity opening end 48 to the clamping member fixed end 38. The groove cavity portion 34 includes a cavity abutment surface 52, which can be positioned opposite to the clamping abutment surface 44. The cavity longitudinal axis P extends between the cavity abutment surface 52 and the clamping abutment surface 44. According to some embodiments of the subject matter of the present application, the cavity abutment surface 52 and / or the clamping abutment surface 44 can be concave or convex in an axially vertical cross-section. The groove cavity portion 34 may include a cavity stop surface 54 for accurately positioning the cutting tool 22 at a predetermined position and providing resistance to the cutting force. The cavity stop surface 54 can be located at the cavity distal end 50.

[0075] The resilient clamping member 36 may be disposed between the internal tool receiving cavity 46 and the resilient slit 42. According to some embodiments of the subject matter of the present application, the internal tool receiving cavity 46 may transition into a tool insertion clearance region 56 at the cavity opening end 48. The tool insertion clearance region 56 may be circumferentially at least partially defined by the groove circumferential surface 32. The dimension of the tool insertion clearance region 56 measured in a direction perpendicular to the cavity longitudinal axis P may be greater than the dimension of the internal tool receiving cavity 46. Such a configuration enables clearance for the cutting tool 22, as described below.

[0076] Now refer to Figure 5 and Figure 6 , showing a cutting tool 22, depicting another aspect of the present application. The cutting tool 22 is non-indexable and is suitable for chamfer cutting operations. The cutting tool 22 is elongated and has a defined forward direction D F To the backward direction D RThe cutting tool 22 includes a tool front end surface 60 and a tool rear end surface 62 opposite to each other and a tool peripheral surface 64 extending therebetween. The tool peripheral surface 64 extends peripherally along the tool longitudinal axis I, wherein the tool longitudinal axis I intersects the tool front end surface 60 and the tool rear end surface 62. The tool front end surface 60 is located at the front end 66 of the cutting tool 22, and the tool rear end surface 62 is located at the rear end 66 of the cutting tool 22. The tool peripheral surface 64 includes an opposite tool top surface 70 and a tool bottom surface 72 and two opposite tool side surfaces 74 connecting the tool top surface 70 and the tool bottom surface 72. According to some embodiments of the subject matter of the present application, the tool bottom surface 72 may include a tool bottom abutment surface 76 for abutting the cavity abutment surface 52. Similarly, the tool rear end surface 62 may include a tool stop surface 78 for abutting the cavity stop surface 54.

[0077] The tool top surface 70 includes a tool top raised portion 80 and a tool top lowered portion 82. The tool top lowered portion 82 is closer to the tool longitudinal axis I than the tool top raised portion 80. The tool top lowered portion 82 extends from the tool rear end surface 62 toward the tool top raised portion 80. According to some embodiments of the subject matter of the present application, the tool top raised portion 80 may extend from the tool front end surface 60. The tool top raised portion 80 and the tool top lowered portion 82 may be connected by a tool top intermediate surface 84, which is oriented transversely to the tool top raised portion 80 and the tool top lowered portion 82.

[0078] like Figure 5 As shown, the tool top raised portion 80 has a tool top raised portion length LR when measured in the direction of the tool longitudinal axis I. The tool top lowered portion 82 has a tool top lowered portion length LL. According to some embodiments of the subject matter of the present application, the tool top raised portion length LR may be less than the tool top lowered portion length LL.

[0079] The tool top raised portion 80 includes a tool top abutment surface 86 for being elastically clamped by the clamping abutment surface 44. According to some embodiments of the subject matter of the present application, the tool top abutment surface 86 can extend to the tool top intermediate surface 84. The tool top abutment surface 86 and the tool bottom abutment surface 76 can have shapes corresponding to the surfaces they abut respectively. That is, the tool top abutment surface 86 and the tool bottom abutment surface 76 can be concave or convex in a substantially V-shaped cross section perpendicular to the axial direction.

[0080] The cutter top lowered portion 82 includes a cutter top non-abutment surface 88. According to some implementations of the disclosed subject matter, the cutter top non-abutment surface 88 can be planar.

[0081] like Figure 6 As shown, the cutting tool 22 includes at least one chamfered portion 90 protruding from the tool side surface 74. Preferably, the cutting tool 22 may include exactly two chamfered portions 90 opposite to each other. That is, the cutting tool 22 includes two opposite laterally protruding chamfered portions 90. This configuration allows the cutting tool 22 to chamfer on both sides of the pre-cut groove. Each chamfered portion 90 includes an opposite chamfered front surface 92 and a chamfered rear surface 94 and a chamfered intermediate surface 96 extending therebetween. The chamfered front surface 92 is closer to the tool front end surface 60 than the chamfered rear surface 94. When measured in a direction perpendicular to the tool longitudinal axis I, the chamfered intermediate surface 96 may be spaced apart from the tool side surface 74 by a chamfer width CW, which defines the maximum width of the chamfer to be cut. Preferably, the chamfer width CW may be approximately 30% of the tool width IW of the cutting tool 22 (measured between the tool side surfaces 74). Each chamfered portion 90 includes a chamfered cutting edge 98. The chamfer cutting edge 98 is formed at the intersection of the chamfer front surface 92 and the tool top surface 70. In the non-limiting example shown in the drawings, the chamfer cutting edge 98 is curved. However, if a straight chamfer is required, the chamfer cutting edge 98 can also be straight. According to some embodiments of the subject matter of the present application, each chamfer portion 90 can be located at the front end 66 of the cutting tool 22. Preferably, each chamfer portion 90 is adjacent to the tool front end surface 60. In a configuration with exactly two chamfer portions 90, the two chamfer cutting edges 98 can be spaced apart by a non-cutting edge 100 and extend rearwardly from the non-cutting edge 100, and the non-cutting edge 100 is formed by the intersection of the tool front end surface 60 and the tool top surface 70.

[0082] like Figure 6 As shown in the top view of the tool, the non-cutting edge 100 extends on both sides of a vertical plane PV containing the tool longitudinal axis I and passing through the top surface 70 of the tool.

[0083] Likewise Figure 6 As shown in the top view of the tool, the total length TL of the tool taken along the tool longitudinal axis I is greater than the total width TW of the tool, which is taken perpendicular to the vertical plane PV and includes the lateral extent of the chamfered portion 90.

[0084] Another aspect of the subject matter of the present application includes a cutting tool 20 having a tool body 24 and a cutting tool 24 that is resiliently clamped in an internal tool receiving cavity 46 by a resilient clamping member 36. When the cutting tool 20 is a slotting tool, there may be a plurality of external tool receiving cavities 58 in which the slotting tools are attached and a plurality of internal tool receiving cavities 58 in which the chamfering cutting tools are attached. Back Figure 1The inner tool receiving cavity 58 is located at an inner radius RI from the central axis B of the body, and the outer tool receiving cavity 46 is located at an outer radius RO from the central axis B of the body, wherein the inner radius RI is smaller than the outer radius RO.

[0085] With respect to the internal tool receiving cavity 58, the tool bottom abutment surface 76 abuts the cavity abutment surface 52. The clamp abutment surface 44 resiliently engages the tool top abutment surface 86. According to some embodiments of the subject matter of the present application, the tool top non-abutment surface 88 can be spaced apart from the resilient clamp member 36. The tool stop surface 78 can abut the cavity stop surface 54.

[0086] Will refer to Figure 3 and Figure 7 5. The positioning and support of the cutting tool 22 in the inner tool receiving cavity 58 will be described. As an introduction, it should be noted that for the circumferentially arranged tool cavity 58, there are at least two methods for inserting the cutting tool 22 into the outer tool receiving cavity 58. For example, one such method includes: placing the cutting tool 22 in front of the outer tool receiving cavity 58, and using a key to apply a force on the front end of the cutting tool and forcibly push the cutting tool into the outer tool receiving cavity 58. Another method includes: using a key to elastically displace the elastic clamping member upward to a predetermined position (forming an open position of the cavity), causing the cutting tool 22 to slide back into the outer tool receiving cavity 58, and then closing the clamping member and clamping the cutting tool 22. However, for the inner arranged inner tool receiving cavity 46, in which the through groove 30 is closed, the cutting tool 22 cannot be placed in front of the cavity open end 48 because a portion of the tool body 24 hinders such placement of the cutting tool 22. To overcome this problem, the tool top surface 70 of the cutting tool 22 is provided with a tool top lowering portion 82 at the rear end 68 of the cutting tool 22. Thus, the cutting tool 22 may be inserted laterally into the front portion of the inner tool receiving cavity 46 before sliding the cutting tool 22 rearwardly into the outer tool receiving cavity 58 and then closing the clamping member and clamping the cutting tool 22. Preferably, the tool insertion clearance area 56 as described above is provided to form clearance for the front portion of the cutting tool 22.

[0087] It should be noted that by means of the resilient clamping member 36, no additional separate clamping means (e.g., a clamp and / or a retaining screw) is required to secure the cutting tool in the cavity. Thus, the internal tool receiving cavity 46 may be free of threaded holes of the type used to receive the retaining screw. Furthermore, no additional width is required in the tool body 24 to accommodate the retaining screw, such as shown in US 9,162,296. Thus, the tool body 24 may be made of less material and is therefore cheaper to manufacture.

[0088] It should be noted that advantageously, the cavity having the peripheral and internal arrangements allows the cutting tool 20 to perform both parting / grooving and chamfering cutting operations in one cutting motion.

[0089] The subject matter of the present application is not limited to rotary slot milling cutters, but may also be applied to, for example but not limited to, non-rotating turning tools, in which the cutting tool 20 is fixedly mounted. For example, Figure 8 A tool body according to the present application is shown. Figure 8 The tool body 24 is in the form of a cutting insert having two opposing insert ends 102, wherein at least one of the insert ends is configured for cutting (i.e., having at least one internal tool receiving cavity 46 and at least one external tool receiving cavity 58). The cutting insert may exhibit mirror symmetry about a transverse plane PT containing a central axis B of the body, such that the cutting insert is double-ended. The cutting insert has an insert longitudinal axis BA extending through the body peripheral surface 28 at both insert ends 102. And here, the internal tool receiving cavity 46 is also closer to the body central axis B than the external tool receiving cavity 58. In addition, the internal tool receiving cavity 46 is closer to the transverse plane PT than the external tool receiving cavity 58.

[0090] Although the subject matter of the present invention has been described with a certain degree of particularity, it will be appreciated that various changes and modifications could be made without departing from the spirit or scope of the invention as claimed.

Claims

1. A non-indexable chamfer cutting tool (22) having a defined forward direction to a rearward direction (D F , D R ), the cutting tool (22) comprising: Opposing tool front end surfaces (60) and tool rear end surfaces (62) and a tool peripheral surface (64) extending therebetween, the tool peripheral surface (64) including a tool top surface (70); a non-cutting edge (100) formed by the intersection of the tool front end surface (60) and the tool top surface (70); as well as at least one chamfered portion (90) projecting laterally from a tool side surface of the cutting tool body and comprising a chamfered cutting edge (98); in: In a top view of the tool, the non-cutting edge (100) extends on both sides of a vertical plane (PV) containing the tool longitudinal axis (I) and passing through the tool top surface (70); and The tool top surface (70) includes a tool top raised portion (80) and a tool top lowered portion (82), the tool top raised portion includes a tool top abutment surface (86), the tool top lowered portion includes a tool top non-abutment surface (88), the tool top raised portion (80) extends from the tool front end surface (60), and the tool top lowered portion (82) extends from the tool rear end surface (62) toward the tool top raised portion (80), The tool top raised portion (80) and the tool top lowered portion (82) are connected via a tool top middle surface (84), and the tool top middle surface is oriented transversely to the tool top raised portion (80) and the tool top lowered portion (82).

2. The cutting tool (22) according to claim 1, wherein: The cutting tool (22) includes exactly two chamfered portions (90) opposite each other, each chamfered portion (90) having a chamfered cutting edge (98).

3. The cutting tool (22) according to claim 2, wherein: The two chamfered cutting edges (98) are spaced apart by the non-cutting edge (100) and extend rearwardly from the non-cutting edge (100).

4. The cutting tool (22) according to claim 1, wherein: The tool top raised portion (80) has a tool top raised portion length (LR); The cutter top lowering portion (82) has a cutter top lowering portion length (LL); and The length of the raised portion of the tool top (LR) is smaller than the length of the lowered portion of the tool top (LL).

5. The cutting tool (22) according to claim 1, wherein: In a top view of the tool, the overall length (TL) of the tool taken along the tool longitudinal axis (I) is greater than the overall width (TW) of the tool taken perpendicular to the vertical plane (PV).

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