Cutter for machining back-off structure

Abstract

The utility model discloses a cutter for processing a back-off structure, which comprises a cutter handle assembly and a cutter head assembly, the cutter handle assembly comprises a cutter handle and a cutter bar which are integrated, the end part of the cutter bar is provided with a positioning hole, the upper part of the positioning hole is provided with a threaded hole, and the cutter head assembly comprises a handle part, a root part and a cutting part. The handle part is connected to the cutting part through the root part, the end part of the handle part is provided with an external thread, the lower part of the external thread is provided with a positioning cylinder, the external thread is suitable for being matched with the threaded hole, the positioning cylinder is suitable for being matched with the positioning hole, and the handle part is detachably connected to the cutter bar. Due to the adoption of the design of the integral cutter handle and the cutter bar, the cutter has extremely high rigidity, so that the high stability of a processed product is ensured; by the adoption of the modular design, interchange and universality are achieved, the use flexibility is greatly improved, the positioning holes and the positioning cylinders are accurately matched, and the requirement for high-precision machining of parts can be met.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a cutting tool for machining undercut structures. Background Technology

[0002] During the manufacturing process, some special undercut structures on parts cannot be machined using standard cutting tools. Special processing techniques are required to achieve these features, but these techniques are inefficient, cannot guarantee the required precision, and result in high processing costs. Existing undercut cutting tools on the market are limited in their capabilities, expensive, and have long procurement cycles, severely impacting product delivery times and hindering market competitiveness.

[0003] Therefore, those skilled in the art are dedicated to developing a cutting tool for machining undercut structures, which can be replaced with different tools according to the size and shape of the part, has strong versatility, is simple to manufacture, and has low procurement costs. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by this utility model is how to solve the problems of low processing efficiency, inability to guarantee the precision requirements of the parts, and high processing cost of the parts with special undercut structures.

[0005] To achieve the above objectives, this utility model provides a cutting tool for machining undercut structures, including a tool holder assembly and a cutting head assembly. The tool holder assembly includes an integral tool holder and a tool shank. A positioning hole is provided at the end of the tool shank, and a threaded hole is provided at the upper part of the positioning hole. The cutting head assembly includes a shank portion, a root portion, and a cutting portion. The shank portion is connected to the cutting portion through the root portion. An external thread is provided at the end of the shank portion, and a positioning cylinder is provided at the lower part of the external thread. The external thread is adapted to cooperate with the threaded hole, and the positioning cylinder is adapted to cooperate with the positioning hole. The shank portion is detachably connected to the tool shank.

[0006] Furthermore, the tool holder is a tapered tool holder.

[0007] Furthermore, the tool holder assembly also includes a pull stud, which is detachably connected to the tool holder.

[0008] Furthermore, the diameter of the positioning hole is larger than the diameter of the threaded hole.

[0009] Furthermore, the diameter of the positioning cylinder is larger than the diameter of the external thread.

[0010] Furthermore, the diameter of the root is smaller than the diameter of the handle.

[0011] Furthermore, the diameter of the cutting portion is larger than the diameter of the handle portion.

[0012] Furthermore, the side of the handle is provided with a milled flat area for disassembly.

[0013] Furthermore, the cutting portion is disc-shaped.

[0014] Furthermore, the outer periphery of the upper surface of the cutting part has a cutting edge.

[0015] The beneficial effects of this utility model are: it provides a cutting tool for machining the undercut structure of parts, which improves machining efficiency, achieves stable product accuracy, reduces machining costs, and shortens the delivery cycle of parts.

[0016] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the tool holder assembly of this utility model;

[0018] Figure 2 This is a schematic diagram of the cutter head assembly of a preferred embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the overall structure of the assembled tool according to a preferred embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the installation of the cutter head assembly and parts according to a preferred embodiment of the present invention;

[0021] Figure 5 This is a top view of the installation of the cutter head assembly and parts according to a preferred embodiment of this utility model;

[0022] Figure 6 yes Figure 5 Sectional view along line AA;

[0023] Figure 7 This is a schematic diagram of the installation of the tool holder assembly, the tool head assembly, and the parts according to a preferred embodiment of this utility model.

[0024] Among them, 10-tool holder assembly, 11-pull stud, 12-tool holder, 13-tool shank, 14-threaded hole, 15-positioning hole, 20-tool head assembly, 21-shank, 22-root, 23-cutting part, 24-external thread, 25-positioning round hole, 26-milling flat area, 27-cutting edge, 30-workpiece to be processed. Detailed Implementation

[0025] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0026] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and this invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings. Example 1

[0027] like Figure 1-3 As shown, this embodiment provides a cutting tool for machining undercut structures, including a tool holder assembly 10 and a cutting head assembly 20. The tool holder assembly 10 includes an integral tool holder 12 and a tool shank 13. The end of the tool shank 13 is provided with a positioning hole 15, and the upper part of the positioning hole 15 is provided with a threaded hole 14. The cutting head assembly 20 includes a shank portion 21, a root portion 22, and a cutting portion 23. The shank portion 21 is connected to the cutting portion 23 through the root portion 22. The end of the shank portion 21 is provided with an external thread 24, and the lower part of the external thread 24 is provided with a positioning cylinder 25. The external thread 24 is adapted to cooperate with the threaded hole 14, and the positioning cylinder 25 is adapted to cooperate with the positioning hole 15. The shank portion 21 is detachably connected to the tool shank 13.

[0028] Preferably, the handle 12 is a tapered handle.

[0029] In this embodiment, the tool holder 12 is a BT40 tool holder with a taper of 7:24.

[0030] In some embodiments, the tool holder assembly 10 further includes a pull stud 11, which is detachably connected to the tool holder 12. The pull stud 11 can be secured in the machine tool spindle.

[0031] In this embodiment, the rivet 11 is a BT40 rivet.

[0032] The diameter of the locating hole 15 is larger than the diameter of the threaded hole 14. The diameter of the locating cylinder 25 is larger than the diameter of the external thread 24.

[0033] In this embodiment, the diameter of the positioning hole 15 is 8.5 mm, and the threaded hole 14 is M8×1.25, with a diameter of 8 mm and a pitch of 1.25 mm. The diameter of the positioning cylinder 25 is 8.5 mm, and the tolerance grade is h6. The external thread 24 is M8×1.25, with a diameter of 8 mm and a pitch of 1.25 mm.

[0034] The diameter of the root 22 is smaller than the diameter of the handle 21. The diameter of the cutting part 23 is larger than the diameter of the handle 21.

[0035] In this embodiment, the diameter of the root 22 is 8.5 mm, the diameter of the handle 21 is 10.5 mm, the diameter of the cutting part 23 is 22.5 mm, and the height of the cutting part 23 is 5.5 mm.

[0036] In some embodiments, the side of the shank 21 is provided with a milled flat area 26 for disassembly. The milled flat area 26 can be a milled square groove or other shapes. Using a special wrench, the external thread 24 on the shank 21 is screwed into the threaded hole 14 on the tool holder 13 to fasten the tool head assembly 20 to the tool holder 13.

[0037] The cutting part 23 is disc-shaped. The outer periphery of the upper surface of the cutting part 23 has a cutting edge 27. In this embodiment, the cutting edge 27 is an R0.2 arc cutting edge. Example 2

[0038] like Figure 4-7 As shown, this embodiment provides a method for using a cutting tool to machine undercut structures:

[0039] During machining, without rotating the spindle, the tool holder 10 is first moved above the opening of the workpiece 30 with the undercut structure. The positioning cylinder 25 on the tool head assembly 20 is aligned with the positioning hole 15 on the tool holder 13, and the tool head assembly 20 is inserted into the tool holder 13. Then, the tool head assembly 20 is rotated counterclockwise until it can no longer rotate. Finally, the spindle rotates clockwise, and the tool holder 13 moves upward with the tool head assembly 20. The cutting part 23 processes the undercut structure feature. After processing is completed, the spindle stops rotating, the tool holder 13 moves downward, the tool head assembly 20 is removed, and the tool holder 13 is moved away from the opening of the workpiece 30.

[0040] The innovation of this utility model lies in:

[0041] The tool holder 13 and the shank 21 are designed with fastening threads for easy installation and fixation. The tool holder 12 and the tool holder 13 are integral, which increases the machining rigidity.

[0042] The side of the shank 21 of the cutter head assembly 20 is provided with a disassembly milling flattening area 26 for easy replacement and maintenance.

[0043] The cutting part 23 is fixed to the end face of the root part 22, and its upper surface is provided with a backed edge 27 for completing the processing of the backed structure.

[0044] The fastening threads, as well as the locating cylinder 25 and locating hole 15, ensure the stability and accuracy of the tool during the machining process.

[0045] This invention is not limited by the size and shape of the machining features. It employs an integral tool holder and shank design, possessing extremely high rigidity, thus ensuring high stability of the machined products. Simultaneously, the tool adopts a modular design, achieving interchangeability and versatility, greatly improving its operational flexibility. Its precise fit between the positioning hole and the positioning cylinder meets the requirements for high-precision machining of parts.

[0046] This undercut tool achieves rapid clamping and precise positioning of the tool head through the high-precision fit between the positioning cylinder and the positioning hole. The tool can be flexibly designed according to different machining characteristics, enabling rapid interchangeability and effectively improving tool utilization.

[0047] The beneficial effects of this utility model include:

[0048] 1. This utility model ensures a smooth, vibration-free machined surface, improving the axial accuracy and appearance quality of the workpiece.

[0049] 2. It has the advantages of low manufacturing cost, strong versatility, good rigidity and high processing stability.

[0050] 3. The cutting tool has a reasonable structure, is easy to install and disassemble, and is convenient for maintenance and replacement, further improving production efficiency and ease of operation.

[0051] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A cutting tool for machining undercut structures, characterized in that, The tool includes a handle assembly and a head assembly. The handle assembly includes an integral handle and a shank. The end of the shank has a positioning hole, and the upper part of the positioning hole has a threaded hole. The head assembly includes a shank, a root, and a cutting part. The shank is connected to the cutting part through the root. The end of the shank has an external thread, and the lower part of the external thread has a positioning cylinder. The external thread is adapted to mate with the threaded hole, and the positioning cylinder is adapted to mate with the positioning hole. The shank is detachably connected to the shank.

2. The cutting tool for machining undercut structures as described in claim 1, characterized in that, The handle is a tapered handle.

3. The cutting tool for machining undercut structures as described in claim 1, characterized in that, The tool holder assembly also includes a pull stud, which is detachably connected to the tool holder.

4. The cutting tool for machining undercut structures as described in claim 1, characterized in that, The diameter of the positioning hole is larger than the diameter of the threaded hole.

5. The cutting tool for machining undercut structures as described in claim 1, characterized in that, The diameter of the positioning cylinder is larger than the diameter of the external thread.

6. The cutting tool for machining undercut structures as described in claim 1, characterized in that, The diameter of the root is smaller than the diameter of the handle.

7. The cutting tool for machining undercut structures as described in claim 1, characterized in that, The diameter of the cutting part is larger than the diameter of the handle.

8. The cutting tool for machining undercut structures as described in claim 1, characterized in that, The side of the handle is provided with a milled flat area for disassembly.

9. The cutting tool for machining undercut structures as described in claim 1, characterized in that, The cutting section is disc-shaped.

10. The cutting tool for machining undercut structures as described in claim 1, characterized in that, The outer periphery of the upper surface of the cutting part has a cutting edge.

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