High-rigidity efficient PCD face milling cutter

Abstract

A high-rigidity efficient PCD face milling cutter comprises a cutter body, an adjusting groove, a mounting groove and a milling mechanism, the adjusting groove and the mounting groove are both formed in the peripheral wall of the cutter body in an inward concave mode, the adjusting groove and the mounting groove are arranged in parallel in the axial direction of the cutter body and are communicated with each other, and the milling mechanism is arranged on the cutter body. Compared with the prior art, the tool has the advantages that through the modular design, the modular design of the tool body, the tool clamp and the adjusting wedge blocks is adopted as a whole, the first wedge-shaped block and the second wedge-shaped block are connected with the tool body through the screws, radial adjustment of the wedge-shaped blocks is achieved, meanwhile, the wedge-shaped faces abut against the tool clamp in a matched mode, and therefore the tool can be adjusted in a matched mode. According to the PCD face milling cutter, the cutter holder and the milling blade are integrally arranged on the cutter body in the axial direction, it is guaranteed that the edge height difference of the cutter is 0.003 mm, the machining precision is further improved, meanwhile, the integral rigidity of the PCD face milling cutter is improved, the vibration amplitude of the cutter body is reduced by 40%, the PCD face milling cutter is suitable for large-feed machining, and the maximum one-time milling amount can reach 3-5 mm.

Description

Technical Field

[0001] This utility model relates to a face milling process for aluminum alloys, non-ferrous metals and plastic parts, specifically a high-rigidity and high-efficiency PCD face milling cutter, belonging to the technical field of face milling processes for aluminum alloys, non-ferrous metals and plastic parts. Background Technology

[0002] PCD face milling cutters are superhard cutting tools with polycrystalline diamond as the cutting edge. They are made by welding PCD composite sheets to cemented carbide or high-speed steel cutter bodies and are specifically designed for milling planes, steps, grooves and other machining scenarios. Compared with traditional cutting tools, their core advantage lies in utilizing the high hardness and wear resistance of diamond to achieve high-efficiency and high-precision machining, and they are especially suitable for cutting non-ferrous metals, non-metals and high-hardness materials.

[0003] However, most existing PCD face milling cutters have various problems. For example, the PCD face milling cutter disclosed in announcement number CN208758696U, although it solves the problem of accessories being thrown off the tool center due to the high centrifugal force generated by the PCD tool at high spindle speeds, avoids or reduces risks from a design perspective, and designs excellent grooves from a mechanical perspective to generate reaction forces to offset or counteract centrifugal forces, still suffers from problems in this technical solution and most current PCD face milling cutters, such as: 1. Traditional carbide face milling cutters are prone to wear, have short lifespans, and low machining efficiency when machining high-hardness materials; 2. Existing PCD milling cutters mostly use welded insert structures, which lack rigidity, are prone to vibration, and affect the quality of the machined surface; 3. Poor heat dissipation performance of the cutter body, which easily leads to a decrease in accuracy due to thermal deformation during high-speed cutting. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. Specifically, the purpose of this utility model is to solve the aforementioned shortcomings of existing technologies by proposing a high-rigidity and high-efficiency PCD face milling cutter.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-rigidity and high-efficiency PCD face milling cutter includes a cutter body, an adjustment groove, a mounting groove, and a milling mechanism. The adjustment groove and the mounting groove are both recessed on the peripheral wall of the cutter body, and the adjustment groove and the mounting groove are arranged side by side along the axial direction of the cutter body and are interconnected. The milling mechanism is disposed on the cutter body.

[0007] The milling mechanism includes a tool holder, a milling cutter, a first wedge block, and a first adjusting screw. The tool holder is placed in a mounting groove, the milling cutter is disposed at one end of the tool holder, the first wedge block is installed in the adjusting groove, and the wedge-shaped surface of the first wedge block abuts against the end of the tool holder away from the milling cutter. A through hole is provided through the center of the first wedge block. A screw hole is provided in the mounting groove and the adjusting groove. The first adjusting screw passes through the through hole and is screwed and locked in the screw hole.

[0008] As a further improvement of this utility model: a strip-shaped groove is provided through the center of the blade holder, and a locking screw is provided in the strip-shaped groove. A screw hole is provided in the mounting groove, and the locking screw is threaded into the screw hole.

[0009] As a further improvement of this utility model: the peripheral wall of the blade body is provided with a transverse screw hole, which is connected to the mounting groove, and an abutment screw is threaded in the screw hole, with one end of the abutment screw abutting against one side of the blade holder.

[0010] As a further embodiment of this utility model: the milling mechanism further includes a second wedge block and a second adjusting screw. The milling end of the cutter body is provided with a groove, which is connected to the mounting groove. A screw hole is provided in the groove, and a second wedge block is provided in the groove. The wedge surface of the second wedge block abuts against one side of the cutter clip, and a second adjusting screw is provided at the center of the second wedge block. The second adjusting screw is threadedly engaged with the screw hole.

[0011] As a further improvement of this utility model: the tool holder is composed of two parts, left and right, and the two parts are separate structures. The milling blade is provided with a protrusion plate, which is engaged between the left and right parts of the tool holder.

[0012] As a further improvement of this utility model: the milling insert adopts a composite cutting edge structure with an axial rake angle of 5°±0.1°, a radial rake angle of 6°±0.1°, and a principal cutting edge angle κ=75°.

[0013] The beneficial effects of this utility model are:

[0014] This utility model employs a modular design, incorporating a tool body, tool holder, and adjusting wedge. The first and second wedges are connected to the tool body via screws, enabling radial adjustment of the wedges. Simultaneously, the wedge surface abuts against the tool holder, ensuring the axial position of the tool holder and milling inserts on the tool body. This guarantees a cutting edge height difference within 0.003mm, further improving machining accuracy. Simultaneously, it enhances the overall rigidity of the PCD face mill, reducing tool body vibration amplitude by 40%. It is suitable for high-feed machining, with a maximum single-pass milling depth of 3-5mm, and extended tool life. The PCD insert life is 8-10 times that of cemented carbide inserts, exceeding 2000 hours when machining aluminum alloys. Furthermore, efficiency is improved, with cutting speeds reaching 3000m / min and a 50% increase in material removal rate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a schematic diagram of the first wedge block and its connection structure of the present invention;

[0018] Figure 4 This is a schematic diagram of the disassembled blade clip structure of this utility model.

[0019] In the figure: 1. Tool body, 2. Adjustment groove, 3. Mounting groove, 4. Milling mechanism, 41. Tool holder, 42. Milling insert, 43. First wedge block, 44. First adjusting screw, 45. Locking screw, 46. Abutment screw, 47. Second wedge block, 48. Second adjusting screw. Detailed Implementation

[0020] 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. Example 1

[0021] like Figures 1 to 4 As shown, a high-rigidity and high-efficiency PCD face milling cutter includes a cutter body 1, an adjustment groove 2, a mounting groove 3, and a milling mechanism 4. The adjustment groove 2 and the mounting groove 3 are both recessed on the peripheral wall of the cutter body 1, and the adjustment groove 2 and the mounting groove 3 are arranged side by side along the axial direction of the cutter body 1 and are interconnected with each other. The milling mechanism 4 is arranged on the cutter body 1.

[0022] The milling mechanism 4 includes a tool holder 41, a milling cutter 42, a first wedge block 43, and a first adjusting screw 44. The tool holder 41 is placed in the mounting groove 3, the milling cutter 42 is disposed at one end of the tool holder 41, the first wedge block 43 is installed in the adjusting groove 2, and the wedge-shaped surface of the first wedge block 43 abuts against the end of the tool holder 41 away from the milling cutter 42. A through hole is provided through the center of the first wedge block 43. A screw hole is provided in the mounting groove 3 and the adjusting groove 2. The first adjusting screw 44 passes through the through hole and is screwed and locked in the screw hole.

[0023] A strip-shaped slot is provided through the center of the blade holder 41, and a locking screw 45 is provided in the strip-shaped slot. A screw hole is provided in the mounting slot 3, and the locking screw 45 is threaded into the screw hole.

[0024] The peripheral wall of the blade body 1 is provided with a transverse screw hole, which is connected to the mounting groove 3, and an abutment screw 46 is threaded in the screw hole, with one end of the abutment screw 46 abutting against one side of the blade holder 41.

[0025] The milling mechanism 4 also includes a second wedge block 47 and a second adjusting screw 48. The milling end of the cutter body 1 is provided with a groove, which is connected to the mounting groove 3. A screw hole is provided in the groove, and a second wedge block 47 is provided in the groove. The wedge-shaped surface of the second wedge block 47 abuts against one side of the cutter clip 41, and a second adjusting screw 48 is provided at the center of the second wedge block 47. The second adjusting screw 48 is threadedly engaged with the screw hole.

[0026] Specifically, the milling insert 42 uses Ag-Cu-Ti active solder with a brazing temperature of 750-800℃ and a bonding strength ≥450Mpa. The insert body diameter is Φ80mm, the number of teeth is Z=8, and it is compatible with BT40 tool holders. The cutting parameters are: vc=3000m / min, ap=3mm, f=0.25mm / z. The test results show that when machining ADC12 aluminum alloy, the surface roughness Ra≤0.8μm.

[0027] This utility model employs a modular design, adopting a modular design of cutter body + cutter holder + adjusting wedge block. The first wedge block 43 and the second wedge block 47 are connected to the cutter body 1 by screws, enabling radial adjustment of the wedge blocks. Simultaneously, the wedge surface abuts against the cutter holder 41, achieving axial positioning of the cutter holder 41 and the milling insert 42 on the cutter body 1. This ensures that the tool height difference is within 0.003mm, further improving machining accuracy. At the same time, it enhances the overall rigidity of the PCD face milling cutter, reduces the vibration amplitude of the cutter body by 40%, and is suitable for high-feed machining. The maximum single-pass milling depth can reach 3-5mm, and the lifespan is extended. The PCD insert lifespan is 8-10 times that of cemented carbide, and the lifespan exceeds 2000 hours when machining aluminum alloys. Simultaneously, efficiency is improved, with a cutting speed of up to 3000m / min for aluminum alloys, and the material removal rate is increased by 50%. Example 2

[0028] like Figures 1 to 4 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0029] The tool holder 41 is composed of two parts, left and right, which are separate structures. The milling insert 42 is provided with a protrusion plate, which is engaged between the left and right parts of the tool holder 41, so that the milling insert 42 can be quickly replaced.

[0030] The milling insert 42 adopts a composite cutting edge structure with an axial rake angle of 5°±0.1°, a radial rake angle of 6°±0.1°, and a principal cutting edge angle κ=75° to optimize the cutting force distribution.

[0031] Working principle: In use, first place the milling insert 42 between the left and right parts of the tool holder 41, and then place the tool holder 41 in the mounting groove 3. At this time, the side wall of the tool holder 41 is abutted by the abutment screw 46 and the second wedge block 47 to achieve pre-fixation of the tool holder 41. Then, according to the actual processing requirements, turn the first adjusting screw 44 to adjust the radial position of the first wedge block 43, and push the axial position of the tool holder 41 on the tool body 1 through the wedge surface. After the adjustment is completed, lock the tool holder 41 with the locking screw 45, and at the same time, tighten the side of the tool holder 41 with the adjusting abutment screw 46 and the second wedge block 47.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-rigidity and high-efficiency PCD face milling cutter, comprising a cutter body (1), an adjustment groove (2), a mounting groove (3), and a milling mechanism (4), characterized in that, The adjustment groove (2) and the mounting groove (3) are both recessed on the peripheral wall of the cutter body (1), and the adjustment groove (2) and the mounting groove (3) are arranged side by side along the axial direction of the cutter body (1) and are interconnected. The milling mechanism (4) is set on the cutter body (1). The milling mechanism (4) includes a tool holder (41), a milling blade (42), a first wedge block (43), and a first adjusting screw (44). The tool holder (41) is placed in the mounting groove (3). The milling blade (42) is set at one end of the tool holder (41). The first wedge block (43) is installed in the adjusting groove (2). The wedge-shaped surface of the first wedge block (43) abuts against the end of the tool holder (41) away from the milling blade (42). A through hole is provided in the center of the first wedge block (43). A screw hole is provided in the adjusting groove (2) of the mounting groove (3). The first adjusting screw (44) passes through the through hole and is screwed and locked in the screw hole.

2. The high-rigidity and high-efficiency PCD face milling cutter according to claim 1, characterized in that: The blade holder (41) has a through slot at its center and a locking screw (45) is provided in the slot. The mounting groove (3) has a screw hole and the locking screw (45) is threaded into the screw hole.

3. The high-rigidity and high-efficiency PCD face milling cutter according to claim 1, characterized in that: The peripheral wall of the blade body (1) is provided with a transverse screw hole, which is connected to the mounting groove (3), and an abutment screw (46) is threaded in the screw hole. One end of the abutment screw (46) abuts against one side of the blade holder (41).

4. The high-rigidity and high-efficiency PCD face milling cutter according to claim 1, characterized in that: The milling mechanism (4) further includes a second wedge block (47) and a second adjusting screw (48). The milling end of the cutter body (1) is provided with a groove, which is connected to the mounting groove (3). A screw hole is provided in the groove, and a second wedge block (47) is provided in the groove. The wedge surface of the second wedge block (47) abuts against one side of the cutter clip (41), and a second adjusting screw (48) is provided at the center of the second wedge block (47). The second adjusting screw (48) is threadedly engaged with the screw hole.

5. A high-rigidity and high-efficiency PCD face milling cutter according to claim 1, characterized in that: The tool holder (41) is composed of two parts, left and right, and the two parts are separate structures. The milling cutter (42) is provided with a convex plate, which is engaged between the left and right parts of the tool holder (41).

6. The high-rigidity and high-efficiency PCD face milling cutter according to claim 1, characterized in that: The milling insert (42) has a composite cutting edge structure with an axial rake angle of 5°±0.1°, a radial rake angle of 6°±0.1°, and a principal cutting edge angle κ=75°.

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