Compound tool

Abstract

The utility model provides a compound tool which comprises a tool bar, an external thread section is arranged at the working end of the tool bar, tool aprons are arranged on the external thread section at intervals, each tool apron comprises a tool apron body, connecting blocks with adjustable radial positions are arranged on the two sides of each tool apron body, and blades are arranged at the free ends of the connecting blocks. A positioning assembly is in threaded connection with the external thread section between every two adjacent tool apron bodies, each positioning assembly comprises a threaded sleeve, and a plurality of gaskets are arranged between the end of each threaded sleeve and the corresponding tool apron and are arranged in a stacked mode in the axial direction. The special-diameter hole machining tool is suitable for machining requirements of different-diameter holes with different hole diameters and corresponding hole depths, the tool bar and the like can be repeatedly used, and the cost of the tool is reduced.

Description

Technical Field

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

[0002] If the inner hole of the workpiece is a coaxial unequal diameter hole (the diameter of the hole is different in different sections along the axial direction), and if it involves 4 hole diameters, then machining one unequal diameter hole requires changing 4 cutting tools to meet the machining of different hole diameters, which reduces the workpiece's technical efficiency.

[0003] Combining multiple cutting tools onto a single tool holder, as in Chinese patent document CN219004628U, can improve workpiece processing efficiency. However, the radial and axial positions of each cutting tool are fixed and cannot be adjusted. Different types and models of workpieces will have different hole diameters and hole depths for each section. Each type of hole requires the machining of a corresponding tool holder, resulting in higher costs. Utility Model Content

[0004] This invention proposes a composite tool that is suitable for machining holes of different diameters and corresponding depths, and the tool holder can be reused, thus reducing the cost of the tool.

[0005] The technical solution of this utility model is implemented as follows: A composite cutting tool includes a tool holder, the working end of which is provided with an external threaded section, and tool holders are provided at intervals on the external threaded section. The tool holder includes a tool holder body, and both sides of the tool holder body are provided with radially adjustable connecting blocks. The free end of the connecting block is provided with a cutting blade. A positioning component is screwed onto the external threaded section between adjacent tool holder bodies. The positioning component includes a threaded sleeve, and a plurality of shims are provided between the end of the threaded sleeve and the tool holder. The plurality of shims are stacked along the axial direction.

[0006] Furthermore, axial positioning grooves are symmetrically arranged on both sides of the external thread section, and a shaft hole is provided in the middle of the tool holder body. The shaft hole is threadedly connected to the external thread section, and a tightening screw is screwed into the tool holder body at the position corresponding to the axial positioning groove. The inner end of the tightening screw is placed in the axial positioning groove.

[0007] Furthermore, a fastening screw is screwed onto the threaded sleeve at the position corresponding to the axial positioning groove, and the inner end of the fastening screw is placed in the axial positioning groove.

[0008] Furthermore, the end of the tool holder body is provided with a positioning protrusion, and the end of the threaded sleeve is provided with a positioning groove, with the positioning protrusion being engaged in the positioning groove.

[0009] Furthermore, the free end of the connecting block is provided with a mounting groove, and an arc-shaped limiting groove is provided at the corner of the mounting groove. The blade is placed in the mounting groove and is bolted to the mounting groove.

[0010] The beneficial effects of this utility model are:

[0011] The positioning component of this utility model can provide a threaded sleeve of the required length for coarse adjustment of the spacing between axially adjacent blades, and adjust the number of shims for fine adjustment of the spacing between axial blades, which is suitable for machining different diameter holes with different hole depths; the tool holder adjusts the radial position of the blade by adjusting the radial position of the connecting block, which is suitable for machining different diameter holes with different hole diameters, and the tool holder and other components can be reused, reducing the cost of the tool. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0015] 1. Tool holder, 2. External thread section, 3. Axial positioning groove, 4. Tool holder, 5. Tightening screw, 6. Threaded sleeve, 7. Arc-shaped limiting groove, 8. Blade, 9. Positioning assembly, 10. Washer, 11. Fastening screw, 12. Positioning protrusion, 13. Positioning groove, 14. Tool holder body, 15. Connecting block, 16. Slot, 17. Radial strip hole. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1-2As shown, a composite cutting tool includes a tool holder 1. The working end of the tool holder 1 has an externally threaded section 2. Axial positioning grooves 3 are symmetrically arranged on both sides of the externally threaded section 2. Tool holders 4 are spaced apart on the externally threaded section 2. The tool holder 4 includes a tool holder body 14. Slots 16 are provided on both sides of the tool holder body 14. Connecting blocks 15 are inserted into the slots 16. Radial slots 17 are provided on the connecting blocks 15, and the radial slots 17 are bolted to the slots 16. A mounting groove is provided at the free end of the connecting block 15. An arc-shaped limiting groove 7 is provided at the corner of the mounting groove. A cutting blade 8 is placed in the mounting groove and bolted to it. The cutting blade 8 is a square blade with a cutting edge at one corner, one of which is located within the arc-shaped limiting groove 7. To adjust the radial position of the cutting blade 8, the insertion depth of the connecting block 15 within the slot 16 is adjusted.

[0018] The tool holder body 14 has a shaft hole in the middle, which is threaded to the external thread section 2. The shaft hole is coaxial with the tool holder 1. A tightening screw 5 is screwed into the tool holder body 14 at the position corresponding to the axial positioning groove 3. The inner end of the tightening screw 5 is placed in the axial positioning groove 3. The tightening screw 5 is used to prevent the tool holder 4 from loosening. At the same time, when the tool holder 1 rotates, it ensures that the tool holder body 14 and the tool holder 1 rotate synchronously.

[0019] A positioning component 9 is screwed onto the external thread section 2 between adjacent tool holder bodies 14. The positioning component 9 includes a threaded sleeve 6, and several shims 10 are disposed between the end of the threaded sleeve 6 and the tool holder 4. The shims 10 are stacked axially. The threaded sleeve 6 with an appropriate shaft length can be selected according to the hole depth of the workpiece. The threaded sleeve 6 is used for coarse adjustment of the distance between adjacent tool holder bodies 14, while the shims 10 are used for fine adjustment of the distance between adjacent tool holder bodies 14. The number of shims 10 can be selected as needed.

[0020] A fastening screw 11 is screwed onto the threaded sleeve 6 at the position corresponding to the axial positioning groove 3. The inner end of the fastening screw 11 is placed in the axial positioning groove 3, and the threaded sleeve 6 is further fixed by the fastening screw 11 to prevent the threaded sleeve 6 from loosening. A positioning protrusion 12 is fixed to the end of the tool holder body 14. The positioning protrusion 12 and the tool holder body 14 are integrally formed. A positioning groove 13 is provided at the end of the threaded sleeve 6, and the positioning protrusion 12 is engaged in the positioning groove 13.

[0021] When assembling the composite tool, the tool holder 4 and the threaded sleeve 6 are coaxially assembled together via the positioning protrusion 12 and the positioning groove 13. Then, the external threaded section 2 of the tool shank 1 is threaded through the shaft hole of the tool holder 4 and the threaded sleeve 6. Finally, the tightening screw 5 and the fastening screw 11 are installed. The positioning protrusion 12 and the positioning groove 13 further limit the position of the tool holder 4 via the threaded sleeve 6, preventing it from loosening.

[0022] If it is necessary to disassemble the tool holder 4 and the threaded sleeve 6 later, unscrew the fastening screw 11 and the tightening screw 5, and finally rotate the external thread section 2 out of the shaft hole of the tool holder 4 and the threaded sleeve 6. Replace the threaded sleeve 6 with the required axial length to process the inner hole of the workpiece with different hole depths; adjust the depth of the connecting block 15 in the slot 16 to facilitate the processing of inner holes with different diameters.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite cutting tool, comprising a tool holder, characterized in that: The working end of the tool holder is provided with an external thread section, and tool holders are provided at intervals on the external thread section. The tool holder includes a tool holder body, and both sides of the tool holder body are provided with radially adjustable connecting blocks. The free end of the connecting block is provided with a cutting blade. A positioning component is screwed onto the external thread section between adjacent tool holder bodies. The positioning component includes a threaded sleeve, and several shims are provided between the end of the threaded sleeve and the tool holder. The several shims are stacked along the axial direction.

2. The composite cutting tool according to claim 1, characterized in that: Axial positioning grooves are symmetrically arranged on both sides of the external thread section. A shaft hole is provided in the middle of the tool holder body. The shaft hole is threadedly connected to the external thread section. A tightening screw is screwed into the tool holder body at the position corresponding to the axial positioning groove. The inner end of the tightening screw is placed in the axial positioning groove.

3. A composite cutting tool according to claim 2, characterized in that: A fastening screw is screwed into the threaded sleeve at the position corresponding to the axial positioning groove, and the inner end of the fastening screw is placed in the axial positioning groove.

4. A composite cutting tool according to claim 1, characterized in that: The end of the tool holder body is provided with a positioning protrusion, and the end of the threaded sleeve is provided with a positioning groove. The positioning protrusion is engaged in the positioning groove.

5. A composite cutting tool according to claim 1, characterized in that: The free end of the connecting block is provided with a mounting groove, and an arc-shaped limiting groove is provided at the corner of the mounting groove. The blade is placed in the mounting groove and is bolted to the mounting groove.

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