Positioning tungsten steel milling cutter disc assembly

Abstract

The application discloses a positioning type tungsten steel milling cutter disc assembly and relates to the field of tungsten steel milling cutter discs. The application comprises a tool shank body, a cutter disc is connected to the outer side of the tool shank body, a plurality of chip removal grooves are formed in the outer surface of the cutter disc, and an installation surface for installing a cutting tool is formed on one side of the chip removal groove; a positioning block is fixedly arranged on the installation surface; the cutting tool comprises a cutting block, positioning grooves are formed in the two side surfaces of the cutting block; the positioning grooves are opposite to the positioning block in position and are used for limiting the position of the cutting tool; two groups of abutting grooves are formed on one side of the installation surface, the abutting grooves abut against the outer side of the cutting tool, the inclined surface positioning block of the installation surface is engaged with the inclined surface positioning groove of the cutting tool, automatic guiding and positioning of the cutting block are realized, the manual adjustment steps are reduced, meanwhile, the two side abutting grooves limit the radial displacement of the cutting tool, resist the lateral cutting force in machining, and the cutting stability is improved.

Description

Technical Field

[0001] This invention relates to the field of tungsten carbide end mill discs, specifically a positioning type tungsten carbide end mill disc assembly. Background Technology

[0002] Tungsten carbide end mills are high-performance cutting tools made of tungsten carbide (hard alloy). They possess extremely high hardness and wear resistance, second only to diamond, making them suitable for high-speed machining of high-hardness materials such as stainless steel, alloy steel, and hardened steel. They come in various structures, including standard cutters (diameter 1-20mm) and non-standard cutters, and are categorized by principal cutting edge angle (45 degrees, 90 degrees, etc.) to suit different cutting force requirements.

[0003] The Institute of Materials Technology and Inspection (IPA) has published a "positioning type tungsten carbide end mill assembly" (CN117086376A). One side of the chip removal groove has a blade mounting groove, in which a cutting blade is installed. The cutting blade is fixedly mounted on the end mill assembly using a fastening device. A clamping block is fixedly installed on the back of the cutting blade. The clamping block has inclined clamping grooves on its two sides. The fastening device includes a clamping plate and a locking bolt. An insertion plate that matches and slides with the clamping groove is fixedly connected to the clamping plate. A locking bolt is rotatably connected to the clamping plate and threadedly connected to the end mill assembly. This design avoids directly slotting the blade while ensuring the chip removal groove is not too small. Therefore, this invention can install the blade without damaging its rigidity or causing poor chip removal.

[0004] There is a problem in the aforementioned comparative document: the fastening device relies on manual assembly of the clamping plate, insertion plate and locking bolts, the directional rod needs to be precisely aligned with the directional groove, and it is easy to loosen due to slight misalignment in a high-speed rotation environment, which increases the installation time and error rate. The clamping block is fixed on the blade, and if it is damaged, the whole thing needs to be replaced, which results in high maintenance costs. In view of this, the inventor urgently needs to design an installation mechanism that can quickly install the blade, so as to further improve the installation firmness and convenience of the blade. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a positioning tungsten carbide end mill assembly to solve the technical problem that the current fastening device requires manual alignment of the clamping groove and the insertion plate, which depends on the accuracy of operation, and the slight misalignment of the guide rod and the guide groove may cause loosening during high-speed rotation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a positioning tungsten carbide end mill assembly, including a tool holder body, an end mill head being snapped onto the outer side of the tool holder body, and a plurality of chip removal grooves being formed on the outer surface of the end mill head, with a mounting surface for mounting cutting tools formed on one side of the chip removal grooves;

[0007] A positioning block is fixedly installed on the mounting surface;

[0008] The cutting tool includes a cutting block, and positioning grooves are provided on both sides of the cutting block;

[0009] The positioning groove is opposite to the positioning block and is used to limit the position of the cutting tool. Two sets of abutment grooves are formed on one side of the mounting surface, and the abutment grooves abut against the outer side of the cutting tool.

[0010] The positioning block has inclined surfaces on both sides away from the abutment groove, and the inner wall of the positioning groove has inclined surfaces on all four sides for guiding the installation of the positioning block.

[0011] By adopting the above technical solution, positioning blocks are set on the mounting surface of the cutter head, which cooperate with the inclined positioning grooves on both sides of the cutting block. The inclined guiding principle is used to achieve rapid and accurate positioning of the cutting tool, which significantly simplifies the installation process and avoids manual alignment errors.

[0012] Furthermore, the positioning block is provided with mounting holes, and the positioning block is detachably mounted to the cutter head via bolts and mounting holes.

[0013] By adopting the above technical solution, the positioning block is detachably connected through mounting holes and bolts, making the positioning module independent of the cutter head body. This facilitates the individual replacement or repair of worn parts, significantly reducing maintenance costs and downtime. At the same time, this split design allows for flexible adaptation to different specifications of cutting tools. The clamping scheme can be adjusted simply by replacing the positioning block, expanding the versatility of the cutter head.

[0014] Furthermore, a cooling mechanism is provided on the mounting surface, the cooling mechanism including a liquid outlet, and one side of the liquid outlet is connected to a first cooling channel and a second cooling channel.

[0015] Furthermore, the other end of the first and second cooling channels is an open structure, and a third cooling channel is provided on the surface of the positioning block, which is connected to the second cooling channel.

[0016] Furthermore, the surface of the positioning block is provided with an annular groove, which is connected to the third cooling channel and is coaxial with the mounting hole.

[0017] Furthermore, the third cooling channel and annular groove are located between the positioning block and the cutting block.

[0018] Furthermore, a sealing ring is provided in the middle of the annular groove to prevent the bolt from contacting the coolant, and the sealing ring abuts against the surface of the cutting block.

[0019] By adopting the above technical solution, the cooling mechanism delivers coolant to the third cooling channel in the positioning block through the first and second cooling channels, and then the annular groove evenly covers the contact surface of the cutting block to achieve precise spray cooling, effectively suppressing tool thermal deformation and workpiece surface oxidation caused by high cutting temperature.

[0020] Furthermore, several of the chip removal grooves are arranged in an equidistant ring.

[0021] By adopting the above technical solution, the chip removal grooves arranged in an equidistant ring form a balanced centrifugal force field under high-speed rotation, which causes the chips to be evenly thrown away from the processing area along the groove, avoiding secondary scratches or abnormal tool wear caused by local accumulation. At the same time, the symmetrically distributed groove structure enhances the dynamic balance performance of the cutter head, reduces the vibration amplitude during high-speed operation, and improves the surface finish and dimensional accuracy of the processed surface.

[0022] Furthermore, a snap-fit ​​step is provided on the outer surface of the tool holder body, and the tool disc is snapped onto the snap-fit ​​step. The tool disc is fastened by bolts and threaded holes.

[0023] Furthermore, both the outer surfaces of the tool holder body and the tool disc are provided with slots, and the slots are bolted with locking blocks to fix the axial angle of the tool holder body and the tool disc.

[0024] By adopting the above technical solution, the snap-fit ​​step of the tool holder body forms a quick positioning interface with the tool disc, and is fastened with bolts through the threaded holes, realizing the tool disc's disassembly and assembly in seconds, meeting the production line's rapid changeover requirements.

[0025] In summary, the present invention has the following main beneficial effects:

[0026] This invention achieves automatic guiding and positioning of the cutting block by setting an inclined positioning block on the mounting surface to engage with the inclined positioning groove of the cutting tool, reducing manual adjustment steps. At the same time, the abutment grooves on both sides restrict the radial displacement of the cutting tool, resist the lateral cutting force during machining, and improve cutting stability.

[0027] The present invention uses a cooling mechanism to connect the third cooling channel of the positioning block through the first and second cooling channels, so that the coolant can directly reach the cutting area, and the sealing ring prevents the coolant in the ring groove from seeping into the bolt hole, thus ensuring cooling efficiency and connection reliability. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0029] Figure 2 This is a schematic diagram of the exploded three-dimensional structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the cutting tool of the present invention;

[0031] Figure 4 This is a schematic diagram of the front view structure of the cutting tool of the present invention;

[0032] Figure 5 For the present invention Figure 1 Enlarged structural diagram at point A;

[0033] Figure 6 For the present invention Figure 2 A magnified structural diagram at point B in the middle.

[0034] In the diagram: 1. Tool holder body; 2. Tool disc; 3. Chip removal groove; 4. Mounting surface; 5. Cutting tool; 501. Cutting block; 502. Positioning groove; 503. Mounting hole; 6. Positioning block; 7. Cooling mechanism; 701. First cooling channel; 702. Second cooling channel; 703. Liquid outlet; 704. Third cooling channel; 705. Annular groove; 706. Sealing ring; 8. Abutment groove; 9. Snap-fit ​​step; 10. Snap-fit ​​groove; 11. Threaded hole; 12. Snap-fit ​​block. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In this embodiment:

[0037] A positioning tungsten carbide end mill assembly, such as Figure 1-6 As shown, it includes a tool holder body 1, a tool disc 2 is snapped onto the outer side of the tool holder body 1, and a plurality of chip removal grooves 3 are formed on the outer surface of the tool disc 2. A mounting surface 4 for mounting the cutting tool 5 is formed on one side of the chip removal grooves 3.

[0038] A positioning block 6 is fixedly installed on the mounting surface 4;

[0039] The cutting tool 5 includes a cutting block 501, and positioning grooves 502 are provided on both sides of the cutting block 501.

[0040] The positioning groove 502 is positioned opposite to the positioning block 6 and is used to limit the position of the cutting tool 5. Two sets of abutment grooves 8 are formed on one side of the mounting surface 4, and the abutment grooves 8 abut against the outer side of the cutting tool 5.

[0041] The positioning block 6 has inclined surfaces on both sides away from the abutment groove 8, and the inner wall of the positioning groove 502 has inclined surfaces on all four sides for guiding the installation of the positioning block 6. By setting the positioning block 6 on the mounting surface 4 of the cutter head 2, and cooperating with the inclined positioning grooves 502 on both sides of the cutting block 501, the cutting tool 5 is quickly and accurately positioned by using the inclined surface guiding principle, which significantly simplifies the installation process and avoids manual alignment errors. At the same time, the two sets of abutment grooves 8 on the side of the mounting surface 4 are tightly abutted with the side of the cutting tool 5 to form a radial limiting support, which effectively resists the lateral cutting force in high-speed cutting, prevents the tool from shifting due to vibration, and improves machining stability. In addition, the chip removal groove 3 ensures that the chips are discharged in time, avoiding chip accumulation that damages the workpiece surface. The overall structure takes into account both installation efficiency and dynamic reliability.

[0042] See Figure 3 , Figure 4 The positioning block 6 has mounting holes 503. The positioning block 6 is detachably mounted to the cutter head 2 via bolts and mounting holes 503. The positioning block 6 is detachably connected to the cutter head 2 via mounting holes 503 and bolts, making the positioning module independent of the cutter head 2 body. This facilitates the individual replacement or repair of worn parts, significantly reducing maintenance costs and downtime. At the same time, this split design allows for flexible adaptation to different specifications of cutting tools 5. Only the positioning block 6 needs to be replaced to adjust the clamping scheme, expanding the versatility of the cutter head 2. In addition, the bolt fixing method does not damage the integrity of the cutter head 2 body structure, avoiding overall scrapping, and is especially suitable for the long-term use of high-value carbide tools.

[0043] See Figure 1 , Figure 2 , Figure 5 , Figure 6 A cooling mechanism 7 is provided on the mounting surface 4. The cooling mechanism 7 includes a liquid outlet 703. One side of the liquid outlet 703 is connected to a first cooling channel 701 and a second cooling channel 702.

[0044] Furthermore, the other end of the first cooling channel 701 and the second cooling channel 702 is an open structure, and a third cooling channel 704 is provided on the surface of the positioning block 6, which is connected to the second cooling channel 702.

[0045] Furthermore, the surface of the positioning block 6 is also provided with an annular groove 705, which is connected to the third cooling channel 704, and the annular groove 705 is coaxially arranged with the mounting hole 503.

[0046] Furthermore, the third cooling channel 704 and the annular groove 705 are located between the positioning block 6 and the cutting block 501.

[0047] Furthermore, a sealing ring 706 is provided in the middle of the annular groove 705 to block the bolt from the coolant. The sealing ring 706 abuts against the surface of the cutting block 501. The cooling mechanism 7 delivers the coolant to the third cooling channel 704 in the positioning block 6 through the first cooling channel 701 and the second cooling channel 702. The annular groove 705 then evenly covers the contact surface of the cutting block 501, achieving precise jet cooling and effectively suppressing tool thermal deformation and workpiece surface oxidation caused by high cutting temperatures. At the same time, the coaxial arrangement of the annular groove 705 and the mounting hole 503, combined with the blocking effect of the sealing ring 706, completely prevents the coolant from seeping into the bolt connection, ensuring cooling efficiency and preventing bolt corrosion or loosening. In addition, the open cooling channel outlet design prevents impurities from accumulating and clogging, ensuring a smooth supply of coolant during continuous processing.

[0048] See Figure 1 , Figure 2 Several chip removal grooves 3 are arranged in an equidistant ring. Under high-speed rotation, the equidistant ring-shaped chip removal grooves 3 form a balanced centrifugal force field, which causes the chips to be evenly thrown away from the processing area along the groove, avoiding secondary scratches or abnormal tool wear caused by local accumulation. At the same time, the symmetrically distributed groove structure enhances the dynamic balance performance of the cutter head 2, reduces the vibration amplitude during high-speed operation, and improves the surface finish and dimensional accuracy of the processed surface. In addition, the optimized chip removal path can be adapted to the processing requirements of viscous materials, significantly improving chip removal efficiency and continuous processing time.

[0049] See Figure 1 , Figure 2 The outer surface of the tool holder body 1 is provided with a snap-fit ​​step 9, and the tool disc 2 is snapped onto the snap-fit ​​step 9. The tool disc 2 is fastened by bolts and threaded holes 11.

[0050] Furthermore, both the outer surfaces of the tool holder body 1 and the cutter head 2 are provided with slots 10, and the slots 10 are bolted with locking blocks 12 to fix the axial angle of the tool holder body 1 and the cutter head 2. The locking step 9 of the tool holder body 1 and the cutter head 2 form a quick positioning interface, which is fastened with bolts through the threaded holes 11 to achieve the second-level disassembly and assembly of the cutter head 2, meeting the needs of rapid changeover on the production line. At the same time, the circumferential locking structure of the slots 10 and the locking blocks 12 ensures that the axial angle of the cutter head 2 relative to the tool holder body 1 is fixed, eliminating the angle deviation during repeated clamping and ensuring the consistency of the benchmark for multi-process machining. In addition, the modular cutter head 2 is designed to allow for the replacement of components with different numbers of teeth or groove types according to the characteristics of the processed materials, so as to achieve single tool holder matching multiple processing needs.

[0051] The implementation principle of this embodiment is as follows: First, the tool holder body 1 is connected to the machine tool spindle through the mounting surface 4 at the bottom to ensure axial positioning. Then, the tool disc 2 with chip removal groove 3 is snapped onto the snapping step 9 of the tool holder body 1 and fixed by bolts through the threaded holes 11. Next, the snap block 12 is used to lock the circumferential angle by embedding it into the snap groove 10 between the tool holder body 1 and the tool disc 2. When installing the cutting insert, the inclined positioning groove 502 of the cutting block 501 is aligned with the guide inclined surface of the positioning block 6 on the tool disc 2 and pushed in, so that the two sides of the cutting block 501 are self-aligned. The moving alignment abutment groove 8 completes the radial limit, and then the mounting hole 503 of the positioning block 6 is locked by bolts. During the processing, the coolant flows sequentially through the first cooling channel 701, the second cooling channel 702 to the third cooling channel 704 in the positioning block 6, and is injected into the annular groove 705 to cover the cutting area. The sealing ring 706 prevents the coolant from seeping into the bolt hole. The chips are efficiently discharged through the chip removal grooves 3 distributed in an equidistant ring, realizing continuous and stable cutting. If maintenance is required, the positioning block 6 can be disassembled independently or the cutting tool can be replaced without the need for complete scrapping.

[0052] Although embodiments of the present invention have been shown and described, these specific embodiments are merely illustrative of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A positioning type tungsten carbide end mill assembly, characterized in that: Includes a tool holder body (1), a tool disc (2) is snapped onto the outer side of the tool holder body (1), and a plurality of chip removal grooves (3) are formed on the outer surface of the tool disc (2), and a mounting surface (4) for mounting a cutting tool (5) is formed on one side of the chip removal groove (3). A positioning block (6) is fixedly provided on the mounting surface (4); The cutting tool (5) includes a cutting block (501), and positioning grooves (502) are provided on both sides of the cutting block (501). The positioning groove (502) is opposite to the positioning block (6) and is used to limit the position of the cutting tool (5). Two sets of abutment grooves (8) are formed on one side of the mounting surface (4), and the abutment grooves (8) abut against the outer side of the cutting tool (5). The positioning block (6) has inclined surfaces on both sides away from the abutment groove (8), and the inner wall of the positioning groove (502) has inclined surfaces on all four sides for guiding the installation of the positioning block (6). A cooling mechanism (7) is provided on the mounting surface (4). The cooling mechanism (7) includes a liquid outlet (703). One side of the liquid outlet (703) is connected to a first cooling channel (701) and a second cooling channel (702). The other ends of the first cooling channel (701) and the second cooling channel (702) are open structures. A third cooling channel (704) is provided on the surface of the positioning block (6). The third cooling channel (704) is connected to the second cooling channel (702). An annular groove (705) is also provided on the surface of the positioning block (6). The annular groove (705) is connected to the third cooling channel (704). The annular groove (705) and the mounting hole (503) are coaxially connected; the third cooling channel (704) and the annular groove (705) are located between the positioning block (6) and the cutting block (501); a sealing ring (706) is provided in the middle of the annular groove (705) to block the bolt and the coolant, and the sealing ring (706) abuts against the surface of the cutting block (501); the cooling mechanism (7) delivers the coolant to the third cooling channel (704) in the positioning block (6) through the first cooling channel (701) and the second cooling channel (702), and then the annular groove (705) evenly covers the contact surface of the cutting block (501).

2. The positioning tungsten carbide end mill assembly according to claim 1, characterized in that: The positioning block (6) has a mounting hole (503), and the positioning block (6) is detachably mounted to the cutter head (2) by means of bolts and mounting hole (503).

3. The positioning tungsten carbide end mill assembly according to claim 1, characterized in that: Several of the chip removal grooves (3) are arranged in an equidistant ring.

4. The positioning tungsten carbide end mill assembly according to claim 1, characterized in that: The outer surface of the handle body (1) is provided with a snap-fit ​​step (9), the cutter disc (2) is snapped onto the snap-fit ​​step (9), and the cutter disc (2) is fastened by bolts and threaded holes (11).

5. The positioning tungsten carbide end mill assembly according to claim 1, characterized in that: The outer surfaces of the handle body (1) and the cutter head (2) are provided with slots (10), and the slots (10) are bolted with blocks (12) to fix the axial angle of the handle body (1) and the cutter head (2).

Images