A PCD milling tool

Abstract

This application relates to a PCD end mill, applied in the field of cutting tools, including a cutter head. The cutter head has several mounting slots, each containing a cutting insert that matches the slot. Each cutting insert has a PCD disc attached to it. The cutting insert has a fixing unit for detachably connecting it to the cutter head. The technical advantage of this application is that when the PCD disc is damaged during machining, the operator can remove the cutting insert and its PCD disc from the cutter head using the fixing unit and replace it with a new cutting insert. This eliminates the need to replace the entire cutter head, achieving a detachable connection between the cutting insert and the PCD disc, increasing flexibility, facilitating maintenance and replacement, and significantly reducing production costs for enterprises by only replacing the damaged part of the cutting insert and PCD disc.

Description

Technical Field

[0001] This application relates to the field of cutting tool technology, and in particular to a PCD end mill. Background Technology

[0002] PCD end mills are cutting tools with PCD (polycrystalline diamond) cutting edges welded onto an alloy or high-speed steel tool base. They are mainly used on milling machines to machine planes, steps, grooves, shaped surfaces, and cut off workpieces.

[0003] The PCD end mills in this technology are made by welding PCD composite sheets (PCD bars) onto the cutter head.

[0004] The aforementioned milling cutter, which directly welds the PCD sheet to the cutter head, requires replacing the entire cutter head if the PCD sheet is damaged during processing, leading to increased production costs. Summary of the Invention

[0005] To address the issue in related technologies where PCD sheets are directly welded to the cutter head, and the entire cutter head needs to be replaced if the PCD sheet is damaged during processing, leading to increased production costs, this application provides a PCD end mill with the following technical solution: It includes a cutter head with several mounting slots, each slot containing a cutting insert that matches the slot, each cutting insert having a PCD sheet attached to it, and each cutting insert having a fixing unit for detachably connecting the cutting insert to the cutter head.

[0006] In one specific implementation, the fixing unit includes a mounting screw passing through the blade, and the cutter head has a first threaded groove that matches the mounting screw, with the mounting screw threadedly connected in the first threaded groove.

[0007] In one specific implementation scheme, the cutter head has an adjustment groove communicating with the mounting groove, the bottom of the adjustment groove has a positioning groove, a positioning post is provided in the positioning groove and the positioning post is partially inserted into the positioning groove, a wedge is provided on the positioning post, the wedge is located in the adjustment groove and the end face of the wedge facing the blade is in contact with the blade, and the cutter head has an adjustment unit for adjusting the position of the wedge.

[0008] In one specific implementation, the adjustment unit includes a second threaded groove formed at the bottom of the positioning groove, a double-ended screw is threadedly connected in the second threaded groove, one end of the double-ended screw facing the positioning post passes through the positioning post and is threadedly connected to the positioning post, and the blade is provided with a limiting component for limiting the wedge to rotate as the double-ended screw rotates.

[0009] In one specific implementation, the limiting component includes a first inclined surface disposed on the end of the wedge facing the blade, and a second inclined surface disposed on the end face of the blade facing the wedge, wherein the first inclined surface and the second inclined surface are in contact with each other.

[0010] In one specific implementation, a retrieval groove is provided on the wall of the adjustment groove.

[0011] In one specific implementation, several blades are arranged along the circumference of the cutter head, and the angles between adjacent blades are not equal.

[0012] In one specific implementation, the PCD wafer is provided with a cutting portion, and the cutting portion is provided with a front angle, the front angle being 1~2°.

[0013] In one specific implementation, the cutter head is provided with a plurality of chip removal grooves.

[0014] In one specific implementation scheme, cooling holes are respectively provided at the bottom of several of the chip removal grooves.

[0015] In summary, this application has the following beneficial technical effects: when the PCD sheet is damaged during processing, the operator can remove the blade and the PCD sheet on the blade from the cutter head through the fixing unit and replace the blade with a new one. There is no need to replace the entire cutter head, which realizes the detachable connection of the blade and the PCD sheet, which is more flexible and convenient for maintenance and replacement. Only the damaged blade and PCD sheet need to be replaced, which greatly reduces the production cost of enterprises. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0017] Figure 2 This is a structural schematic diagram used to illustrate the first inclined surface in the embodiments of this application.

[0018] Reference numerals: 1. Cutter head; 2. Mounting slot; 3. Blade; 4. PCD plate; 5. First threaded groove; 6. Adjustment groove; 7. Positioning groove; 8. Positioning pin; 9. Wedge; 10. Second threaded groove; 11. First inclined surface; 12. Second inclined surface; 13. Pick-up groove; 14. Chip removal groove; 15. Cooling hole. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0020] This application discloses a PCD end mill.

[0021] Reference Figure 1 and Figure 2The PCD end mill includes a cutter head 1 connected to the machining equipment. The cutter head 1 has several mounting slots 2, and inserts 3 matching the size of the mounting slots 2 are respectively arranged in the slots 2. The ends of the inserts 3 have placement slots, and PCD plates 4 matching the size of the placement slots are welded into the placement slots. In this embodiment, the number of mounting slots 2 is set to six, and the six inserts 3 are arranged along the circumference of the cutter head 1 with unequal angles between adjacent inserts 3. That is, the angle between the tip of the PCD plate 4 on two adjacent inserts 3 and the line connecting the center of the cutter head 1 is unequal. Preferred angles are 61°, 58°, 63°, 57°, 62°, and 59°. This embodiment uses an unequal tooth angle design, which can effectively reduce resonance between the cutter head 1 and the workpiece during machining, improving the stability of the cutter head 1 during machining.

[0022] Reference Figure 1 and Figure 2 The blade 3 is equipped with a fixing unit for detachably connecting the blade 3 to the cutter head 1. The fixing unit includes a mounting screw that passes through the blade 3. The cutter head 1 has a first threaded groove 5 that matches the size of the mounting screw, and the mounting screw is threaded into the first threaded groove 5. Therefore, when the PCD sheet 4 is damaged during processing, the operator can remove the blade 3 and the PCD sheet 4 on the blade 3 from the cutter head 1 by removing the screw, and replace it with a new blade 3 without replacing the entire cutter head 1. This achieves a detachable connection between the blade 3 and the PCD sheet 4, providing greater flexibility and facilitating maintenance and replacement. Only the damaged parts of the blade 3 and PCD sheet 4 need to be replaced, greatly reducing the company's production costs. Since the blade 3 and PCD sheet 4 can be replaced individually, the type of blade 3 can also be flexibly adjusted according to actual needs to adapt to different processing tasks.

[0023] Reference Figure 1 and Figure 2 The PCD cutter 4 is provided with a chip section and a rake angle, which ranges from 1 to 2°. In this embodiment, the cutting edge of the blade 3 is made with a larger inclination angle, but still retains a cutting rake angle of 1°, thereby reducing the elastic-plastic deformation when the chip is cut off, making the PCD end mill lighter and faster in the chip cutting process.

[0024] Reference Figure 1 and Figure 2The cutter head 1 has several chip removal grooves 14, and cooling holes 15 are respectively formed at the bottom of the grooves 14. The cooling holes 15 supply coolant to the cutting area to achieve efficient heat dissipation, which helps to reduce the cutting temperature, reduce the thermal stress and wear of the tool, extend the tool life, and also wash away the chips and debris in the cutting area, further improving chip removal performance and improving machining quality. In this embodiment, the number of chip removal grooves 14 is set to six, and the six chip removal grooves 14 and the six cutting tools 3 are arranged alternately. By designing the chip removal grooves 14, it can be ensured that the chips can be smoothly discharged from the cutting area, avoiding chip accumulation that leads to tool wear or a decrease in machining quality.

[0025] Reference Figure 1 and Figure 2 The cutter head 1 has an adjustment groove 6 communicating with the mounting groove 2. A positioning groove 7 is formed at the bottom of the adjustment groove 6. A positioning post 8 is installed in the positioning groove 7, and part of the positioning post 8 is inserted into the positioning groove 7. A wedge 9 is fixedly connected to the outer edge of the positioning post 8. The wedge 9 is located in the adjustment groove 6, and its end face facing the blade 3 is in contact with the blade 3. The cutter head 1 is equipped with an adjustment unit for adjusting the position of the wedge 9. A retrieval groove 13 is formed on the wall of the adjustment groove 6, which facilitates the operator to retrieve and place the wedge 9 from the adjustment groove 6.

[0026] Reference Figure 1 and Figure 2 The adjustment unit includes a second threaded groove 10 at the bottom of the positioning groove 7. A double-ended screw is threaded into the second threaded groove 10. The end of the double-ended screw facing the positioning post 8 passes through the positioning post 8 and is threadedly connected to the positioning post 8. The blade 3 is provided with a limiting component to restrict the wedge 9 from rotating with the double-ended screw. The limiting component includes a first inclined surface 11 on the end of the wedge 9 facing the blade 3 and a second inclined surface 12 on the end face of the blade 3 facing the wedge 9. The first inclined surface 11 and the second inclined surface 12 are in contact with each other. Since the contact surface between the wedge 9 and the blade 3 is inclined, space is saved in the axial direction of the cutter head 1, so that the cutter head 1 can be made thinner in some special cases.

[0027] Therefore, when it is necessary to fine-tune the position of the blade 3 and the PCD sheet 4 welded to the blade 3, the operator inserts a hex wrench into the internal hex socket of the double-ended screw and rotates the hex wrench to rotate the double-ended screw. Since one end of the double-ended screw is threaded to the positioning post 8, and the first inclined surface 11 of the wedge 9 and the second inclined surface 12 of the blade 3 are in contact with each other, the double-ended screw drives the positioning post 8 and the wedge 9 to rise and fall vertically during rotation. By utilizing the inclined state of the contact surface between the wedge 9 and the blade 3, the wedge 9 applies a force to the blade 3 during the rising and falling process, thereby achieving fine-tuning of the height of the blade 3 and the PCD sheet 4 welded to the blade 3. This can maximize the surface roughness requirements of the parts processed by the cutter head 1.

[0028] Furthermore, in this embodiment, the cutter head 1 adopts a minimum size and uses a tangential mounting and locking method in the diameter direction to install the inserts 3, allowing the cutter head 1 to accommodate as many inserts 3 as possible. This effectively increases the feed rate of the PCD end mill during machining, thereby improving machining efficiency. Simultaneously, because the inserts 3 can be quickly replaced, it is convenient and quick to change to different cutting edge forms, rapidly meeting the machining requirements of different parts. This application also controls the runout of the inserts 3 to within 0.015mm through strict control of machining accuracy and online detection.

[0029] The implementation principle of this application embodiment is as follows: Therefore, when the PCD sheet 4 is damaged during processing, the operator can remove the blade 3 and the PCD sheet 4 on the blade 3 from the cutter head 1 by unscrewing with screws, and replace it with a new blade 3. This eliminates the need to replace the entire cutter head 1, achieving a detachable connection between the blade 3 and the PCD sheet 4. This provides greater flexibility, facilitates maintenance and replacement, and only the damaged part of the blade 3 and PCD sheet 4 needs to be replaced, significantly reducing the company's production costs. Since the blade 3 and PCD sheet 4 can be replaced individually, the type of blade 3 can also be flexibly adjusted according to actual needs to adapt to different processing tasks.

[0030] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A PCD milling tool characterised in that: Includes a cutter head (1), on which a plurality of mounting slots (2) are provided, and in each of the plurality of mounting slots (2) are blades (3) that match the mounting slots (2), and on each of the plurality of blades (3) are PCD plates (4), and on each blade (3) are a fixing unit for detachably connecting the blade (3) to the cutter head (1).

2. The PCD milling tool of claim 1, wherein: The fixing unit includes a mounting screw that passes through the blade (3), and the cutter head (1) has a first threaded groove (5) that matches the mounting screw. The mounting screw is threaded into the first threaded groove (5).

3. The PCD milling tool of claim 1, wherein: The cutter head (1) has an adjustment groove (6) that communicates with the mounting groove (2). The bottom of the adjustment groove (6) has a positioning groove (7). The positioning groove (7) has a positioning post (8) and the positioning post (8) is partially inserted into the positioning groove (7). The positioning post (8) has a wedge (9). The wedge (9) is located in the adjustment groove (6) and the end face of the wedge (9) facing the blade (3) is in contact with the blade (3). The cutter head (1) has an adjustment unit for adjusting the position of the wedge (9).

4. The PCD milling tool of claim 3, wherein: The adjustment unit includes a second threaded groove (10) opened at the bottom of the positioning groove (7). A double-ended screw is threaded in the second threaded groove (10). One end of the double-ended screw facing the positioning post (8) passes through the positioning post (8) and is threadedly connected to the positioning post (8). The blade (3) is provided with a limiting component for limiting the wedge (9) to rotate with the double-ended screw.

5. The PCD milling tool of claim 4, wherein: The limiting component includes a first inclined surface (11) disposed on the end of the wedge (9) facing the blade (3), and a second inclined surface (12) disposed on the end face of the blade (3) facing the wedge (9), wherein the first inclined surface (11) and the second inclined surface (12) are in contact with each other.

6. The PCD end mill according to claim 3, characterized in that: The adjustment groove (6) has a retrieval groove (13) on its groove wall.

7. The PCD milling tool of claim 1, wherein: Several blades (3) are arranged along the circumference of the cutter head (1) and the angles between adjacent blades (3) are not equal.

8. The PCD milling tool of claim 1, wherein: The PCD sheet (4) is provided with a cutting part, and the cutting part is provided with a front angle, the range of which is 1~2°.

9. The PCD milling tool of claim 1, wherein: The cutter head (1) has several chip removal grooves (14).

10. The PCD milling tool of claim 9, wherein: Cooling holes (15) are respectively provided at the bottom of several of the chip removal grooves (14).

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