Cutting tool

Abstract

The utility model provides a cutting tool and a cutting blade. The cutting tool comprises two oppositely arranged first peripheral surfaces and two oppositely arranged second peripheral surfaces, the first peripheral surface is a V-shaped recess and is provided with two first butt joint surfaces which are flat surfaces and intersect with each other, and the second peripheral surface is provided with a second flat butt joint surface; the cutting end face of the cutter bar is provided with a blade groove matched with the cutting blade, and the blade groove comprises a first supporting wall and a second supporting wall which are connected with each other; the first supporting wall is an inverted-V-shaped protrusion matched with the first peripheral face and is provided with two third side faces which are both flat faces and intersect with each other, and the second supporting wall is a flat face. The first butt joint face abuts against the third side face, and the second butt joint face abuts against the second supporting wall. According to the cutting tool, a blade is easy, convenient and stable to clamp.

Description

Technical Field

[0001] The invention relates to a cutting tool, in particular to a cutting tool with strong clamping rigidity. Background Art

[0002] In the field of cutting tools used in grooving and turning internal hole groove processing, there are many examples of cutting tools, the blade of the cutting tool is clamped in the blade groove of the head of the tool body, and the blade groove has an upper clamping part and a lower supporting part; or the blade of the cutting tool is clamped in the blade groove of the head of the tool body by a screw side, and the blade groove has two retaining parts, and the blade is positioned and clamped under the two retaining parts and the screw, and then cutting is performed.

[0003] For example, publication number CN115246011A provides a cutting blade and a tool body and clamping thereof. Due to the characteristics of the cutting blade and the tool body, when the blade is clamped on the tool body, the third peripheral surface or the fourth peripheral surface of the blade is not positioned and clamped with the retaining part of the tool body, but is positioned and clamped with the first peripheral surface or the second peripheral surface of the blade and the arc surface of the first retaining part and the second retaining part of the tool body. The rigidity of the clamped tool is weak, and the outer shape structure of the arc surface of the first retaining part and the second retaining part is complex. When cutting the workpiece, chips are easy to enter between the first peripheral surface or the second peripheral surface and the second retaining part of the tool body, resulting in chips easily causing wear on the positioning support surface and affecting the clamping accuracy. Summary of the invention

[0004] Based on this, the utility model aims to overcome the defects of the prior art and provide a cutting tool with a blade that is easy and stable to clamp.

[0005] A cutting tool comprising:

[0006] The cutting blade comprises two first peripheral surfaces arranged opposite to each other and two second peripheral surfaces arranged opposite to each other; the first peripheral surface is V-shaped and concave, and has two first butt joint surfaces which are both flat and intersecting, and the second peripheral surface has a flat second butt joint surface;

[0007] A tool bar, the cutting end surface of which is provided with a blade groove matching the cutting blade, the blade groove comprising a first supporting wall and a second supporting wall intersecting with each other; the first supporting wall is an inverted V-shaped protrusion matching with the first outer peripheral surface, and has two third side surfaces which are both flat surfaces and intersecting with each other, and the second supporting wall is a flat surface;

[0008] The first butting surface abuts against the third side surface, and the second butting surface abuts against the second supporting wall.

[0009] Specifically, the V-shaped angle of the first outer peripheral surface is α, 100°≤α≤130°.

[0010] Specifically, the inverted V-shaped angle of the first supporting wall is β, β<α.

[0011] Furthermore, the two first peripheral surfaces and the two second peripheral surfaces intersect with each other in pairs, and a cutting edge is formed at the intersection of the first peripheral surface and the second peripheral surface.

[0012] Furthermore, the cutting blade also includes two oppositely arranged blade side surfaces, the first outer peripheral surface and the second outer peripheral surface extend between the two blade side surfaces; the blade side surface includes a first part, a third part and a second part protruding relative to the first part and the third part; the second part is arranged between the first part and the third part, the first part and the third part respectively extend from the cutting edge at one end to the cutting edge at the other end along two oppositely arranged second outer peripheral surfaces, and the second part abuts against the bottom surface of the blade groove.

[0013] Specifically, the first outer peripheral surface and the second outer peripheral surface are perpendicular to the second portion.

[0014] Furthermore, the cutting end face includes a support portion and the blade slot respectively arranged on opposite sides of the cutting end face, the support portion protrudes relative to the bottom surface of the blade slot, and the first support wall and the second support wall are respectively formed by the side surfaces of the support portion facing the blade slot.

[0015] Specifically, the first supporting wall and the second supporting wall are connected by an arc-shaped recess transition.

[0016] Furthermore, a chip groove is provided on the side of the tool bar near the blade groove, the chip groove is connected to the V-shaped depression of the first outer peripheral surface facing outward, and the first side wall of the first outer peripheral surface near the working cutting edge is higher than the side wall of the adjacent chip groove.

[0017] Furthermore, the first peripheral surface includes two intersecting first side walls, and the first side wall includes the first butt joint surface and a first rake surface; the first rake surface is transitionally connected to the first butt joint surface through a concave arc surface.

[0018] The advantages of the present application over the prior art are as follows: the cutting tool provided by the embodiment of the present application, firstly, adds the second support wall of the blade groove to clamp the second peripheral surface of the cutting blade, and with the first support wall and the first peripheral surface connected in a V-shape, three positioning supports are formed between the cutting blade and the fixed support wall of the tool bar, making the blade clamping simple and stable. Secondly, since the abutting first docking surface and the third side surface, the second docking surface and the second support wall are all flat surfaces, the structure is simple and easier to manufacture. Finally, the second support wall is changed from a positioning support for the first peripheral surface to a positioning support for the second peripheral surface, which increases the chip removal space and solves the problem of chip storage during cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional schematic diagram of the assembly of a cutting tool according to an embodiment of the present application;

[0020] Figure 2 This is a three-dimensional schematic diagram of a tool bar of a cutting tool according to an embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of the side structure of a cutting blade of a cutting tool according to an embodiment of the present application;

[0022] Figure 4 A side view of one end of a cutting tool insert slot according to an embodiment of the present application;

[0023] Figure 5 for Figure 4 A partial enlarged view of the middle A area;

[0024] Among them: 1. arbor; 2. cutting blade; 3. fastener; 21. blade side; 22. first peripheral surface; 23. second peripheral surface; 24. cutting edge; 25. mounting hole; 211. first part; 212. second part; 213. third part; 221. first side wall; 222. first docking surface; 223. first front cutting surface; 231. second docking surface; 232. back cutting surface; 11. cutting end face; 12. blade slot; 13. first supporting wall; 14. second supporting wall; 15. bottom surface of blade slot; 16. supporting part; 17. chip groove; 18. chip groove side wall; 19. arbor side; 131. third side. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0026] See also Figure 1-5 A cutting tool according to an embodiment of the present application includes a cutting blade 2, a tool rod 1 and a fastener 3.

[0027] The cutting blade 2 is enclosed and defined by two oppositely disposed blade side surfaces 21, two oppositely disposed first peripheral surfaces 22, and two oppositely disposed second peripheral surfaces 23; the first peripheral surface 22 and the second peripheral surface 23 extend between the two blade side surfaces 21, the two first peripheral surfaces 22 and the two second peripheral surfaces 23 intersect with each other respectively, and a cutting edge 24 is formed at the intersection of the first peripheral surface 22 and the second peripheral surface 23.

[0028] The first outer peripheral surface 22 is or substantially is V-shaped and concave, and includes two intersecting first side walls 221 . The first side wall 221 includes a first butt joint surface 222 and a first rake surface 223 . Both first butt joint surfaces 222 are flat surfaces and intersect in a V-shape.

[0029] The second outer peripheral surface 23 includes relief surfaces 232 disposed at both ends and a second butt joint surface 231 disposed in the middle, and the second butt joint surface 231 is a flat surface.

[0030] The cutting end face 11 of the tool bar 1 is provided with a blade groove 12 matching the cutting blade 2 . The blade groove 12 includes a first supporting wall 13 and a second supporting wall 14 intersecting with each other, and a blade groove bottom surface 15 .

[0031] The first supporting wall 13 is an inverted V-shaped protrusion matched with the first outer peripheral surface 22 , and includes two intersecting third side surfaces 131 , and both of the third side surfaces 131 are flat surfaces.

[0032] The second supporting wall 14 is a flat surface.

[0033] The first butting surface 222 abuts against the third side surface 131 , and the second butting surface 231 abuts against the second supporting wall 14 .

[0034] A mounting hole 25 penetrating through the two blade side surfaces 21 is provided in the middle of the blade side surface 21 , and the fastener 3 fixes the cutting blade 2 in the blade groove 12 through the mounting hole 25 .

[0035] The cutting tool provided in the embodiment of the present application, firstly, adds the second support wall 14 of the blade groove 12 to clamp the second peripheral surface 23 of the cutting blade 2, and adds the first support wall 13 and the first peripheral surface 22 connected in a V-shape, so that three positioning supports are formed between the cutting blade 2 and the fixed support wall of the tool bar 1, so that the blade clamping is simple and stable. Secondly, since the abutting first docking surface 222 and the third side surface 131, the second docking surface 231 and the second support wall 14 are all flat surfaces, the structure is simple and easier to process and manufacture. Finally, the second support wall 14 is changed from positioning the first peripheral surface 22 to positioning the second peripheral surface 23, which increases the chip removal space and solves the problem of chip storage during cutting.

[0036] As an example

[0037] Optionally, the first rake surface 223 is transitionally connected to the first butting surface 222 through a concave cambered surface.

[0038] Optionally, the rear face 232 intersects the second abutting face 231 at an obtuse angle.

[0039] Optionally, the first supporting wall 13 and the second supporting wall 14 are connected by an arc-shaped recess transition.

[0040] Specifically, the fastener 3 may be a fastening screw, and the mounting hole 25 may be a threaded hole.

[0041] Optionally, the knife rod 1 is substantially cylindrical, or is formed by connecting two cylinders with different diameters.

[0042] As an example

[0043] Optionally, the V-shaped angle of the first outer peripheral surface 22 is α, 100°≤α≤130°.

[0044] Optionally, the inverted V-shaped angle of the first supporting wall 13 is β, β<α.

[0045] Preferably, 0°≤α—β≤5°.

[0046] As an example

[0047] The cutting end face 11 includes a support portion and a blade slot 12 respectively arranged on opposite sides of the cutting end face 11, the support portion is protruding relative to the bottom surface of the blade slot 12, and the first support wall 13 and the second support wall 14 are respectively formed by the side of the support portion facing the blade slot 12. The support wall of the blade slot 12 (including the intersecting first support wall 13 and second support wall 14) formed by the complete support portion is stronger, providing strong support for the cutting blade 2 and improving the clamping rigidity of the tool.

[0048] As an example

[0049] The blade side 21 includes a first portion 211, a third portion 213 and a second portion 212 protruding relative to the first portion 211 and the third portion 213; the second portion 212 is arranged between the first portion 211 and the third portion 213, and the first portion 211 and the third portion 213 extend from the cutting edge 24 at one end to the cutting edge 24 at the other end along two oppositely arranged second peripheral surfaces 23; the second portion 212 abuts against the bottom surface 15 of the blade groove.

[0050] Optionally, the first outer peripheral surface 22 and the second outer peripheral surface 23 are perpendicular to the second portion 212 .

[0051] Optionally, the second portion 212 is disposed around the mounting hole 25 .

[0052] Optionally, the second portion 212 is substantially in a rhombus shape, and two opposite corners of the rhombus point to the middle of the second outer peripheral surface 23 respectively.

[0053] As an example

[0054] A chip groove 17 is provided on the side of the tool bar 1 near the blade groove 12. The chip groove 17 is connected to the V-shaped depression of the first outer peripheral surface 22 facing outward, and the first side wall 221 near the working cutting edge is higher than the adjacent chip groove side wall 18. The working cutting edge refers to the cutting edge 24 that can be used for cutting in this installation state. The first outer peripheral surface 22 abutting against the first supporting wall 13 is the first outer peripheral surface 22 facing inward, and the other first outer peripheral surface 22 arranged opposite to the first outer peripheral surface 22 facing inward is the first outer peripheral surface 22 facing outward. In other words, the first outer peripheral surface 22 connected to the working cutting edge is the outer peripheral surface facing outward. The chip groove side wall 18 is lower than the first side wall 221 near the working cutting edge, which is conducive to the guided discharge of chips.

[0055] Optionally, the chip groove 17 is formed by a V-shaped depression on the side of the tool bar 1.

[0056] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A cutting tool, characterized in that: include: A cutting blade comprising two first peripheral surfaces arranged opposite to each other and two second peripheral surfaces arranged opposite to each other; The first outer peripheral surface is V-shaped and concave, and has two first butt joint surfaces that are both flat and intersecting, and the second outer peripheral surface has a flat second butt joint surface; A tool bar, the cutting end surface of which is provided with a blade groove matching the cutting blade, the blade groove comprising a first supporting wall and a second supporting wall intersecting with each other; the first supporting wall is an inverted V-shaped protrusion matching with the first outer peripheral surface, and has two third side surfaces which are both flat surfaces and intersecting with each other, and the second supporting wall is a flat surface; The first butting surface abuts against the third side surface, and the second butting surface abuts against the second supporting wall.

2. A cutting tool according to claim 1, characterized in that: The V-shaped angle of the first outer peripheral surface is α, 100°≤α≤130°.

3. A cutting tool according to claim 2, characterized in that: The inverted V-shaped included angle of the first supporting wall is β, β<α.

4. A cutting tool according to any one of claims 1 to 3, characterized in that: The two first peripheral surfaces and the two second peripheral surfaces intersect with each other in pairs, and a cutting edge is formed at the intersection of the first peripheral surface and the second peripheral surface.

5. A cutting tool according to claim 4, characterized in that: The cutting blade also includes two oppositely arranged blade side surfaces, the first peripheral surface and the second peripheral surface extend between the two blade side surfaces respectively; the blade side surface includes a first part, a third part and a second part protruding relative to the first part and the third part; the second part is arranged between the first part and the third part, the first part and the third part extend from the cutting edge at one end to the cutting edge at the other end respectively along two oppositely arranged second peripheral surfaces, and the second part abuts against the bottom surface of the blade groove.

6. A cutting tool according to claim 5, characterized in that: The first outer peripheral surface and the second outer peripheral surface are perpendicular to the second portion.

7. A cutting tool according to any one of claims 1 to 3, characterized in that: The cutting end face includes a support portion and the blade slot respectively arranged on opposite sides of the cutting end face, the support portion protrudes relative to the bottom surface of the blade slot, and the first support wall and the second support wall are respectively formed by the side surfaces of the support portion facing the blade slot.

8. A cutting tool according to claim 7, characterized in that: The first supporting wall and the second supporting wall are connected by an arc-shaped recess transition.

9. A cutting tool according to any one of claims 1 to 3, characterized in that: A chip groove is provided on the side of the tool bar near the blade groove, which is connected to the V-shaped depression of the first outer peripheral surface facing outward, and the first side wall of the first outer peripheral surface near the working cutting edge is higher than the side wall of the adjacent chip groove.

10. A cutting tool according to any one of claims 1 to 3, characterized in that: The first outer peripheral surface includes two intersecting first side walls, and the first side wall includes the first butt joint surface and a first rake surface; the first rake surface is transitionally connected to the first butt joint surface through a concave cambered surface.

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