A method of making a PCD wire drawing tool

Abstract

The application relates to a preparation method of a PCD wire drawing texture cutter and relates to the technical field of the wire drawing texture cutter, which comprises raw material pretreatment, accurate batching, gradient mixing, screening treatment, hot-pressing sintering and post-treatment. The polycrystalline diamond particles are combined with Ti-Si additives to densify the diamond sintered body, form a D-D combined network skeleton structure in the subsequent process, significantly improve the wear resistance and the anti-chipping ability of the subsequently prepared wire drawing texture cutter, the screening equipment is used to realize the screening of the crushed materials in the preparation process, the uniformity of the particles is ensured, the subsequent production quality of the cutter is improved, the crushing treatment device is arranged in the screening equipment to meet the self-recycling processing of unqualified materials, the recycling of resources is realized, and the effect of improving the completeness of the preparation process is achieved.

Description

Technical Field

[0001] This application relates to the field of cutting tool design technology, and in particular to a method for preparing a PCD brushed surface tool. Background Technology

[0002] PCD brushed finish cutting tools are primarily used for surface decoration processing of products, especially in industries with high requirements for product appearance and texture. In the manufacturing of high-end electronic product casings, such as smartphones, tablets, and laptops, they can create a delicate and textured brushed finish, enhancing the visual appeal and tactile feel of the product and satisfying consumers' pursuit of fashionable and high-quality appearance.

[0003] However, the traditional tools used to create brushed textures are usually made of ordinary high-speed steel or cemented carbide. The tool structure is relatively simple and singular, mostly a one-piece design. The processing technology mainly relies on traditional mechanical milling and grinding methods, lacking precise texture control. In actual operation, due to the rapid and uneven wear of the tool edge, the brushed texture is uneven in depth and spacing, resulting in poor texture clarity and continuity. For example, in the mass production of electronic product casings, the brushed texture quality problem often leads to product appearance defects and a high scrap rate. At the same time, traditional tools have very low adaptability to different materials and texture requirements. Every time a product or material is changed, a lot of time is often spent adjusting the tool parameters, or even replacing the tool, which greatly affects production efficiency and increases production costs and production cycle.

[0004] Therefore, a method for preparing PCD wire drawing tools is proposed to improve the material and meet the requirements of high-strength wire drawing. At the same time, the preparation process generally requires screening of material particles to reduce the inconsistency in particle size. However, traditional screening equipment has low processing capacity for unqualified particles, which can easily lead to waste or affect the preparation efficiency. Summary of the Invention

[0005] The purpose of this application is to provide a method for preparing PCD brushed surface tools to solve the problems mentioned in the background art.

[0006] The method for preparing a PCD brushed surface tool provided in this application adopts the following technical solution: In a first aspect, this application provides that the PCD brushing tool is composed of the following materials: Polycrystalline diamond particles are used as the primary cutting material. Ti-Si based additives, with a content of 3-8 wt%, are used to improve the toughness of materials; Cobalt-based alloy binder, with a content of 10-15 wt%, is used to enhance the interparticle bonding force; Nano-tungsten carbide particles, with a content of 5-8 wt%, are used to improve the hardness and thermal stability of materials. Rare earth oxides, with a content of 0.5-2 wt%, are used to refine grains and improve sintering performance; Secondly, this application also proposes a method for preparing the PCD brushed tool, comprising the following steps: S1. Raw material pretreatment: Polycrystalline diamond particles, Ti-Si additive powder, cobalt-based alloy powder, nano tungsten carbide particles and rare earth oxides are respectively subjected to surface activation treatment. S2. Precise ingredient proportions: Weigh the above materials according to the proportions, wherein the cobalt-based alloy binder is pre-treated by atomization powdering. S3. Gradient mixing: First, ball mill the nano-tungsten carbide particles and rare earth oxides for 20-30 minutes, then add Ti-Si additives and ball mill for 10-20 minutes, and finally add PCD particles and cobalt-based alloy powder and ball mill for 30-40 minutes. S4. Screening: The mixture is placed inside the screening equipment and screened uniformly by vibration to obtain a uniform particle mixture. S5. Hot pressing sintering: The mixture is loaded into a graphite mold and sintered at a pressure of 5.5-6.5 GPa and a temperature of 1450-1550℃ for 15-25 minutes to obtain the milling cutter blank. S6. Post-processing: The sintered milling cutter blank is quenched, polished, and laser-processed to obtain the desired wire drawing milling cutter.

[0007] By adopting the above technical solution, namely introducing nano-tungsten carbide particles and rare earth oxides as modified functional materials, and a cobalt-based alloy bonding system, the hardness, wear resistance, and toughness of PCD brushed end mills can be significantly improved. Furthermore, the addition of Ti-Si additives enables the cobalt-based alloy binder to form a DD-bonded network skeleton structure with the polycrystalline diamond particles. The bonding phase is evenly distributed in a star-like or willow-like pattern at the three-way grain boundaries of the polycrystalline diamond particles. In this way, PCD materials with uniform overall performance and fine particle size can be prepared, which can significantly improve the wear resistance and chipping resistance of PCD brushed tools.

[0008] Preferably, the laser processing in step S5 uses laser micromachining technology combined with high-precision CAD / CAM software to precisely design the micro-geometry of the cutting edge of the tool.

[0009] By adopting the above technical solution, namely relying on high-precision laser processing technology and the cutting edge contour shaped by CAD / CAM software, combined with real-time monitoring by an online visual inspection system, the prepared cutting tool can produce ultra-fine brushed texture with a roughness Ra as low as 0.1μm, with clear and smooth texture lines, meeting the requirements of high-precision brushing processing.

[0010] Preferably, the screening equipment used in step S4 includes a support frame. A motor is installed on the left side of the support frame. The output end of the motor is connected to a pulley assembly, which is located at the rear left end of the support frame. The upper front end of the pulley assembly is connected to a rotating arm. The lower end of the rotating arm is rotatably connected to a connecting arm. The right side of the connecting arm is rotatably connected to a connecting frame. A screen plate is installed inside the connecting frame. The four sides of the bottom of the connecting frame abut against support wheels, which are installed on the upper right side of the support frame. The two outer sides of the connecting frame are connected to a stabilizing frame, and the bottom of the stabilizing frame is fixedly connected to the support frame. The support frame is fixed to the upper left side of the guide plate. A crushing device is installed on the right side of the connecting frame.

[0011] By adopting the above technical solution, that is, by the reciprocating transmission of the rotating arm and the connecting arm, the connecting frame can move back and forth along the upper end of the support wheel, thereby enabling the screen plate to have a reciprocating screening effect and enabling the rapid screening and processing of metal particles.

[0012] Preferably, the crushing and processing device includes a housing, which is connected to the right side of the connecting frame. A cylinder is installed on the left side inside the housing, and the upper end of the cylinder is connected to a connecting strip, which is fixedly connected to the right side of the screen plate. A servo motor is installed at the upper end of the housing, and the lower end of the servo motor is connected to the crushing roller. A material collection shell is provided opposite to the outside of the crushing roller and is installed inside the housing. A vibrating brush assembly is installed at the lower end of the crushing roller. A filter plate is connected to the bottom of the vibrating brush assembly. A locking assembly is installed in the middle of the filter plate and is connected to the lower middle part of the vibrating brush assembly.

[0013] By adopting the above technical solution, unqualified metal particles can enter the inside of the chamber and be recycled and crushed by the crushing rollers installed inside the chamber, thereby improving resource reuse. Furthermore, through the linkage of the vibration brush assembly, the screening efficiency of the filter plate for reprocessed metal particles can be accelerated.

[0014] Preferably, the vibrating brush assembly includes a protective shell connected to the lower end of the collection shell, a rotating shaft inserted in the middle of the protective shell, the top of the rotating shaft connected to the crushing roller, a vibrating structure connected to the bottom of the rotating shaft, and the vibrating structure connected to the middle of the filter plate, and a brushing structure provided on the outer side of the lower end of the rotating shaft.

[0015] By adopting the above technical solution, namely the rotating crushing roller, the bottom-connected rotating shaft can be synchronously driven, thereby enabling the linkage operation of the vibration structure and the brushing structure in conjunction with the rotating shaft.

[0016] Preferably, the vibration structure includes a turntable, which is connected to the bottom of the rotating shaft. A ball is embedded in the lower end of the turntable, and the lower end of the ball abuts against the support tray. A groove is provided on the upper end of the support tray, and a spring is provided on the outer side of the lower end of the support tray. The bottom of the support tray is connected to the filter plate.

[0017] By adopting the above technical solution, namely, cooperating with the rotation of the rotating shaft, the ball bearings can interact with the groove, and with the elastic return of the spring, the intermittent vibration of the support tray can be achieved, so that the filter plate has the property of vibrating screening.

[0018] Preferably, the brushing structure includes a main bevel gear, the middle of which is connected to the outer side of the lower end of the rotating shaft. Both sides of the main bevel gear are meshed with secondary bevel gears, which are connected to the inner sides of the protective shell. A rotating cylinder is connected to the middle of one side of the secondary bevel gear, and a transmission groove is formed on the outside of the rotating cylinder. A protective cover is provided on the outside of the rotating cylinder, and both sides of the protective cover are fixed to the housing and the protective shell, respectively. A sliding plate is embedded inside the transmission groove, and a movable seat is connected to the lower end of the sliding plate. The middle of the movable seat is connected to a guide rod, and both sides of the guide rod are fixed to the housing and the protective shell, respectively. A brush plate is installed at the bottom of the movable seat.

[0019] By adopting the above technical solution, bidirectional meshing transmission can be achieved when the rotating shaft rotates. This allows the rotating drum to rotate, and the drum, in conjunction with the external transmission groove and the sliding plate, indirectly moves the brush plate back and forth, thereby sweeping the metal particles at the top of the filter plate and avoiding the problem of metal particles accumulating and being difficult to screen.

[0020] Preferably, the locking assembly includes a mating hole, which is located at the middle of the upper part of the filter plate and is connected to the lower end of the support tray. A connecting shaft is inserted into the middle of the lower end of the filter plate, and the upper end of the connecting shaft is inserted into the lower end of the support tray. A locking button is threaded onto the external part of the connecting shaft. A movable shaft is inserted into the internal part of the connecting shaft. Both sides of the upper end of the movable shaft are connected to the locking bar. A positioning shaft is fixedly provided at the upper end of the movable shaft, and a compression spring is installed on the external part of the positioning shaft.

[0021] By adopting the above technical solution, when it is necessary to clean the standard metal particles that have not yet been crushed at the upper part of the filter plate, it can be easily unlocked and disassembled, allowing the filter plate and the lower part of the vibrating structure to be quickly disassembled and cleaned.

[0022] Preferably, the number of balls along the bottom of the turntable is the same as the number of grooves on the upper end of the support tray, and the diameter of the balls is the same as the diameter of the grooves.

[0023] Preferably, the upper end of the movable shaft is integrally provided with a concave ring, and the movable shaft is connected to the side of the lock bar through the provided concave ring.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. This application combines polycrystalline diamond particles with Ti-Si additives to form a dense diamond sintered body, which then forms a DD-bonded network skeleton structure. This significantly improves the wear resistance and chipping resistance of the brushed tools prepared afterward. At the same time, during the preparation process, a sieving device is required to sieve the pulverized material to ensure uniform particle size and improve the quality of subsequent tool production. The sieving device is also equipped with a crushing treatment device to meet the self-recycling processing of unqualified materials, realize resource reuse, and improve the integrity of the preparation process. 2. In the preparation process of this application, advanced laser micromachining technology can be used, combined with high-precision CAD / CAM software, to accurately design the micro-geometry of the tool edge according to the customer's specific requirements for the brushed texture, so as to meet the perfect replication of various fine and complex brushed texture patterns in the future. 3. This application includes a crushing roller, a collection shell, a vibrating brush assembly, and a filter plate. The crushing roller assists in crushing unqualified materials to a qualified particle state. The crushed material is discharged through the collection shell and falls onto the filter plate for standard screening. Simultaneously, the rotating crushing roller drives the rotating shaft connected to its bottom, causing the turntable to rotate. Rollers located at the bottom of the turntable intermittently engage with grooves on the upper part of the receiving plate, enabling the reciprocating vibration of the filter plate connected to the bottom in conjunction with springs on the lower part of the receiving plate. Thus, the filter plate performs vibratory screening of the crushed material, accelerating the overall screening efficiency and meeting the requirements for efficient resource recycling and reuse.

[0025] 4. This application features a brushing structure, whereby the rotating shaft can mesh with the main bevel gear and the two side auxiliary bevel gears during rotation. This allows the rotating drum, which is connected to one end of the auxiliary bevel gear, to rotate. The rotating drum, in conjunction with the externally provided transmission groove, enables the lateral reciprocating movement of the slide plate embedded at the lower end. The movable seat connected to the bottom of the slide plate can be supported and guided by a guide rod to drive the brush strip to move back and forth, thereby assisting in the brushing and dispersion of the material on the upper part of the filter plate, preventing material accumulation during screening and affecting screening efficiency.

[0026] 5. This application is equipped with a locking component, which, under the cooperation of the locking button on the outside of the connecting shaft and the locking bars on both sides of the upper end of the connecting shaft, can stably connect the filter plate with the bottom of the receiving tray. By releasing the locking button and pressing the movable shaft inserted inside the connecting shaft, the locking shafts on both sides can be easily moved inward and retracted, thereby releasing the locking state of the locking bars on both sides. In this way, the filter plate can be quickly disassembled from the bottom of the receiving tray to meet different working needs. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the preparation process of this application; Figure 2 This is a schematic diagram of the screening equipment in this application; Figure 3 This is a frontal view of the internal structure of the screening equipment in this application; Figure 4 This is a frontal view of the internal structure of the crushing and processing device of this application; Figure 5 This is a front view schematic diagram of the internal structure of the vibration brush assembly of this application; Figure 6 This is a three-dimensional disassembled structural diagram of the vibration structure of this application; Figure 7 This is a frontal view of the internal structure of the brush-shaped structure in this application; Figure 8 yes Figure 7 Enlarged structural diagram at point B; Figure 9 yes Figure 5 Enlarged structural diagram at point A in the middle.

[0028] Explanation of reference numerals in the attached drawings: 1. Support frame; 2. Motor; 3. Pulley assembly; 4. Rotating arm; 5. Connecting arm; 6. Connecting frame; 7. Screen plate; 8. Support wheel; 9. Stabilizing frame; 10. Guide plate; 11. Crushing and processing device; 111. Housing; 112. Cylinder; 113. Connecting bar; 114. Servo motor; 115. Crushing roller; 116. Collection shell; 117. Vibrating brush assembly; 1171. Protective shell; 1172. Rotating shaft; 1173. Vibrating structure; 11731. Turntable; 11732. Ball bearing; 11733. Support plate; 117 34. Groove; 11735. Spring; 1174. Brush mechanism; 11741. Main bevel gear; 11742. Secondary bevel gear; 11743. Rotary drum; 11744. Transmission groove; 11745. Protective cover; 11746. Slide plate; 11747. Moving seat; 11748. Guide rod; 11749. Brush plate; 118. Filter plate; 119. Locking assembly; 1191. Docking hole; 1192. Connecting shaft; 1193. Lock button; 1194. Moving shaft; 1195. Locking bar; 1196. Positioning shaft; 1197. Compression spring. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 -Appendix Figure 9 This application will be described in further detail below.

[0030] A method for preparing a PCD brushed finish tool, referring to... Figure 1 ,include: In the first aspect, this application provides a PCD brushed finish tool composed of the following materials: Polycrystalline diamond particles are used as the primary cutting material. Ti-Si based additives, with a content of 3-8 wt%, are used to improve the toughness of materials; Cobalt-based alloy binder, with a content of 10-15 wt%, is used to enhance the interparticle bonding force; Nano-tungsten carbide particles, with a content of 5-8 wt%, are used to improve the hardness and thermal stability of materials. Rare earth oxides, with a content of 0.5-2 wt%, are used to refine grains and improve sintering performance; Secondly, this application also proposes a method for preparing PCD brushed finish tools, including the following steps: S1. Raw material pretreatment: Polycrystalline diamond particles, Ti-Si additive powder, cobalt-based alloy powder, nano tungsten carbide particles and rare earth oxides are respectively subjected to surface activation treatment. S2. Precise ingredient proportions: Weigh the above materials according to the proportions, wherein the cobalt-based alloy binder is pre-treated by atomization powdering. S3. Gradient mixing: First, ball mill the nano-tungsten carbide particles and rare earth oxides for 20-30 minutes, then add Ti-Si additives and ball mill for 10-20 minutes, and finally add PCD particles and cobalt-based alloy powder and ball mill for 30-40 minutes to obtain a preliminary mixture. S4. Screening: The mixture is placed inside the screening equipment and screened uniformly by vibration to obtain a uniform particle mixture. S5. Hot pressing sintering: The sieved mixture is loaded into a graphite mold and sintered at a pressure of 5.5-6.5 GPa and a temperature of 1450-1550℃ for 15-25 minutes to obtain a milling cutter blank. S6. Post-processing: The sintered milling cutter blank is quenched, polished, and laser-processed to obtain the desired wire drawing milling cutter.

[0031] Specifically, by introducing nano-tungsten carbide particles and rare earth oxides as modified functional materials, along with a cobalt-based alloy bonding system, the hardness, wear resistance, and toughness of PCD brushed end mills can be significantly improved. Furthermore, the addition of Ti-Si additives enables the cobalt-based alloy binder to form a DD-bonded network skeleton structure with the polycrystalline diamond particles. The bonding phase is evenly distributed in a star-like or willow-like pattern at the three-way grain boundaries of the polycrystalline diamond particles. In this way, PCD materials with uniform overall performance and fine particle size can be prepared, which can significantly improve the wear resistance and chipping resistance of PCD brushed tools.

[0032] In step S5, the laser processing uses laser micromachining technology combined with high-precision CAD / CAM software to precisely design the micro-geometry of the cutting edge of the tool.

[0033] Specifically, relying on high-precision laser processing technology and the cutting edge contour shaped by CAD / CAM software, combined with real-time monitoring by an online visual inspection system, the prepared cutting tools can produce ultra-fine brushed textures with a roughness Ra as low as 0.1μm, with clear and smooth texture lines, meeting the requirements of high-precision brushing processing.

[0034] Reference Figure 2-3 The screening equipment used in step S4 includes a support frame 1. A motor 2 is installed on the left side of the support frame 1. The output end of the motor 2 is connected to a pulley assembly 3, which is located at the rear left side of the support frame 1. The upper front of the pulley assembly 3 is connected to a rotating arm 4, and the lower end of the rotating arm 4 is rotatably connected to a connecting arm 5 to achieve a rotating push-pull action. The right side of the connecting arm 5 is rotatably connected to a connecting frame 6. A screen plate 7 is rotatably installed inside the connecting frame 6. The four sides of the bottom of the connecting frame 6 abut against support wheels 8, and the four support wheels 8 are installed on the four sides of the upper right side of the support frame 1, thereby achieving auxiliary lateral guidance support. With the support in place, the middle of both the front and rear sides of the connecting frame 6 are connected to the stabilizing frame 9, and the bottom of the stabilizing frame 9 is fixedly connected to the support 1. This can further enhance the stability of the reciprocating movement of the connecting frame 6 and avoid tilting. The support 1 is fixed to the upper left side of the guide plate 10, and the guide plate 10 is installed along the inclined direction. The right side of the connecting frame 6 is equipped with a crushing device 11, which can move the connecting frame 6 back and forth along the upper end of the support wheel 8 through the reciprocating transmission action of the rotating arm 4 and the connecting arm 5. This allows the screen plate 7 to have a reciprocating screening effect, enabling the rapid screening and processing of metal particles.

[0035] Specifically, when screening the crushed material is required, the motor 2 is operated to rotate the pulley group 3 connected to the output end of the motor 2. In this way, the pulley group 3 can drive the rotating arm 4 connected to the front end of the upper part to rotate. The rotating arm 4 in the rotating state can realize the reciprocating push and pull action of the external connecting arm 5. Thus, the connecting frame 6 connected to the right side of the connecting arm 5 will move smoothly back and forth along the upper right side of the support 1 through the support and guidance of the support wheels 8 and the stabilizing frame 9 on the four sides of the bottom and the front and rear sides. Thus, when the crushed material is poured into the connecting frame 6, the screen plate 7 installed inside the connecting frame 6 will perform reciprocating screening of the material, so that the crushed material passes through the screen plate 7 and is discharged through the receiving and guiding of the guide plate 10 set at the lower end, thus completing the rapid screening of the crushed material.

[0036] Reference Figure 4-8The crushing and processing device 11 includes a housing 111, which is connected to the right side of the connecting frame 6. The left side of the housing 111 is open. A cylinder 112 is installed inside the left side of the housing 111. The upper end of the cylinder 112 is connected to a connecting strip 113, which is fixedly connected to the right side of the screen plate 7. The connecting strip 113 has a hollow groove inside. Thus, by pulling the connecting strip 113 with the cylinder 112, the screen plate 7, which is installed inside the connecting frame 6 and is placed in a flat state, can be adjusted to an inclined state, allowing unqualified crushed materials to enter the processing activity through the opening on the left side of the housing 111. A servo motor 114 is installed at the upper end of the housing 111, and the lower end of the servo motor 114 is connected to the crushing roller 115. A collection shell 116 is provided opposite to the outside of the crushing roller 115 and is installed in the housing. Inside the housing 111, the internal space of the collection shell 116 gradually decreases from top to bottom, thus cooperating with the crushing roller 115 to achieve efficient auxiliary crushing. A vibrating brush assembly 117 is installed at the lower end of the crushing roller 115, and a filter plate 118 is connected to the bottom of the vibrating brush assembly 117. The filter plate 118 is rectangular in shape, and the filtering positions of the filter plate 118 are located on the left and right sides inside. A locking assembly 119 is installed in the middle of the filter plate 118, and the locking assembly 119 is connected to the lower middle part of the vibrating brush assembly 117. That is, unqualified metal particles can enter the inside of the housing 111 and pass through the crushing roller 115 inside the housing 111 to achieve recycling and crushing processing, improve resource reuse, and through the linkage of the vibrating brush assembly 117, the screening efficiency of the filter plate 118 for reprocessed metal particles can be accelerated.

[0037] The vibrating brush assembly 117 includes a protective shell 1171, which is connected to the lower end of the collection shell 116. A rotating shaft 1172 is vertically inserted into the middle of the protective shell 1171, and the top of the rotating shaft 1172 is connected to the crushing roller 115, so that it can rotate synchronously with the crushing roller 115. A vibrating structure 1173 is connected to the bottom of the rotating shaft 1172, and the vibrating structure 1173 is connected to the middle of the filter plate 118. A brush structure 1174 is provided on the outer side of the lower end of the rotating shaft 1172. The rotating crushing roller 115 can be driven to rotate synchronously with the rotating shaft 1172 connected to the bottom. In this way, the vibration structure 1173 and the brush structure 1174 can be linked to operate in conjunction with the rotating shaft 1172.

[0038] The vibration structure 1173 includes a turntable 11731, which is connected to the bottom of the rotating shaft 1172. Six balls 11732 are equidistantly embedded at the lower end of the turntable 11731. The lower ends of the six balls 11732 abut against the upper end of the support tray 11733. The upper end of the support tray 11733 has six grooves 11734. A spring 11735 is provided on the outer side of the lower end of the support tray 11733, and the bottom of the spring 11735 is connected to the bottom of the inner part of the protective shell 1171. This provides stable rebound and assistance. The bottom of the support tray 11733 penetrates the bottom of the protective shell 1171 and is connected to the middle of the filter plate 118. When the rotating shaft 1172 rotates, the balls 11732 can interact with the grooves 11734 and the spring 11735 to elastically reset and assist, thereby achieving intermittent vibration of the support tray 11733 and enabling the filter plate 118 to have vibratory screening properties.

[0039] The number of balls 11732 along the bottom of the turntable 11731 is the same as the number of grooves 11734 on the upper end of the support tray 11733, and the diameter of the balls 11732 is the same as the diameter of the grooves 11734. Thus, as the turntable 11731 rotates, the balls 11732 at the bottom can intermittently embed into the grooves 11734 on the upper end of the support tray 11733 to achieve intermittent compression, thereby enabling subsequent vibration-assisted activities.

[0040] The brushing structure 1174 includes a main bevel gear 11741, the middle of which is connected to the outer side of the lower end of the rotating shaft 1172. The main bevel gear 11741 and the turntable 11731 are arranged vertically opposite each other. Secondary bevel gears 11742 mesh with the main bevel gear 11741 on both sides, and the secondary bevel gears 11742 are connected to the upper left and right sides of the protective shell 1171. A rotating cylinder 11743 is laterally connected to the middle of the outer side of the secondary bevel gears 11742. A transmission groove 11744 is formed on the outside of the rotating cylinder 11743, and the transmission groove 11744 is arranged in a cross-spiral groove shape to meet reciprocating lateral transmission. A protective cover 11745 covers the outside of the rotating cylinder 11743, and the two sides of the protective cover 11745 are fixed to the housing 111 and the protective shell 1171 respectively, thus preventing material from entering the transmission. The groove 11744 ensures smooth reciprocating transmission. A slide plate 11746 is movably embedded in the lower end of the transmission groove 11744. A movable seat 11747 is connected to the lower end of the slide plate 11746. The middle part of the movable seat 11747 is connected to the guide rod 11748. The two sides of the guide rod 11748 are fixed to the housing 111 and the protective shell 1171, respectively. A brush plate 11749 is vertically installed at the bottom of the movable seat 11747. The bottom of the brush plate 11749 is set in the shape of a soft brush. That is, when the shaft rotates, bidirectional meshing transmission can be realized. In this way, the rotating drum 11743 is rotated. The rotating drum 11743, in conjunction with the docking effect of the external transmission groove 11744 and the slide plate 11746, indirectly moves the brush plate 11749 reciprocally. This sweeps the metal particles screened on the upper end of the filter plate 118, avoiding the problem of metal particles accumulating and being difficult to screen.

[0041] Specifically, by operating the cylinder 112 located on the left side inside the housing 111, the cylinder 112 can pull down the connecting strip 113 at the top. This causes the screen plate 7 installed inside the connecting frame 6 to be rotated from a flat position to an inclined position. As a result, the unqualified crushed material at the top of the screen plate 7 will enter from the opening on the left side of the housing 111 through the inclined guide. At the same time, the reciprocating movement of the connecting frame 6 can also assist in pushing the unqualified material, so that the unqualified material can enter the housing 111 stably and avoid clogging. After entering the housing 111, the unqualified material will fall into the collection shell 116. The crushing roller 115 installed in the middle of the collection shell 116 will be driven by the servo motor 114 connected at the top to achieve rapid rotation. This will recover and crush the unqualified material that has fallen into the collection shell 116, and adjust the unqualified material to a qualified state, thus avoiding waste of resources. The material that has completed auxiliary crushing will exit from the bottom of the collection shell 116 and fall onto the upper end of the filter plate 118 for further screening and filtration to ensure that the material after auxiliary crushing meets the subsequent processing standards. During the crushing process, the rotating shaft 1172 connected to the bottom of the crushing roller 115 will synchronously rotate the turntable 11731 connected to it. This causes the ball bearings 11732 installed at the bottom of the turntable 11731 to move intermittently out of the grooves 11734 on the upper end of the support tray 11733 as it rotates. During this movement, the ball bearings 11732 push the support tray 11733 downwards, thus compressing the spring 11735 installed at the lower end of the support tray 11733. When moving downwards, the bottom-locked filter plate 118 can be pushed down, causing the filter plate 118 to move down a certain distance. When the balls 11732 re-embed into the grooves 11734 as they rotate, the balls 11732 will release the pressure on the support tray 11733. In this way, the spring 11735 compressed at the lower end of the support tray 11733 will rebound to assist in the automatic upward movement of the support tray 11733. Thus, the support tray 11733 can move upwards and reset the bottom-locked filter plate 118. Therefore, through the intermittent embedding of the balls 11732 into the grooves 11734, the reciprocating vibration effect of the filter plate 118 can be achieved. This allows the filter plate 118 to accelerate the material passing efficiency and achieve a rapid screening effect when performing auxiliary screening of crushed materials. Simultaneously, when the rotating shaft 1172 is in a rotating motion, it can also realize the synchronous rotation of the main bevel gear 11741 connected to the lower external end. When the main bevel gear 11741 rotates, it can realize the meshing transmission of the secondary bevel gears 11742 connected on both sides. Thus, the rotating cylinder 11743 connected to the outer ends of the secondary bevel gears 11742 on both sides will rotate simultaneously, and simultaneously realize the rotation of the externally opened transmission groove 11744. When the transmission groove 11744 is in a rotating state, the sliding plate 11746 that is movably embedded in the lower end of the transmission groove 11744 will cooperate with the rotation and opening direction of the transmission groove 11744 to achieve The material moves back and forth horizontally. Simultaneously, the movable seat 11747, which is connected to the bottom of the slide plate 11746, can move back and forth synchronously and stably through the support and guidance of the guide rod 11748 connected in the middle. In this way, the brush plate 11749 connected to the bottom of the movable seat 11747 can brush the material screened on the upper end of the filter plate 118, so that the screened material is dispersed, the efficiency of subsequent vibratory screening is accelerated, and the material accumulation phenomenon is avoided, which affects the screening efficiency. Thus, the material that has completed the auxiliary crushing process can also achieve the simultaneous vibration screening and brushing dispersion activities, which greatly enhances the auxiliary treatment effect of unqualified materials.

[0042] Reference Figure 9 The locking assembly 119 includes a mating hole 1191, which is located in the middle of the upper end of the filter plate 118 and connects to the lower end of the support tray 11733 for positioning and docking. A connecting shaft 1192 is inserted into the middle of the lower end of the filter plate 118, and the upper end of the connecting shaft 1192 is inserted into the lower end of the support tray 11733. The connecting shaft 1192 has external threads, and the upper ends of the connecting shaft 1192 are open on both sides to ensure the stable movement of the locking bar 1195 during subsequent outward and inward movements. A locking button 1193 is threaded onto the external thread of the connecting shaft 1192. Rotation of the locking button 1193 achieves a locking and anti-loosening effect. A movable shaft 1194 is vertically and movably inserted into the connecting shaft 1192. The bottom of the shaft 1194 extends beyond the lower end of the connecting shaft 1192, thereby enabling a stable manual pressing effect. The upper left and right sides of the movable shaft 1194 are connected to the locking strips 1195, and the locking strips 1195 on both sides are rotatably connected to the left and right sides of the upper end of the connecting shaft 1192, respectively. At the same time, the joints between the locking strips 1195 and the upper end of the movable shaft 1194 are spherical. The upper end of the movable shaft 1194 is vertically fixed with a positioning shaft 1196, which is inserted into the upper end of the connecting shaft 1192. The positioning shaft 1196 is equipped with a compression spring 1197, which allows for easy unlocking and disassembly when the upper end of the filter plate 118 still has uncrushed standard metal particles, enabling quick disassembly and cleaning of the filter plate 118 and the lower end of the vibration structure 1173.

[0043] The upper end of the movable shaft 1194 is integrally provided with a concave ring, and the movable shaft 1194 is connected to the spherical end of the side of the locking bar 1195 through the concave ring. In this way, during the up and down movement of the movable shaft 1194, the locking bar 1195 connected to the top concave ring can smoothly move outward to expand or inward to retract.

[0044] Specifically, when it is necessary to disassemble the filter plate 118, the locking button 1193 on the outside of the connecting shaft 1192 can be rotated to move the locking button 1193 away from the lower center of the filter plate 118, thereby releasing the locking state. At this time, the connecting shaft 1192 is pushed inward to move a distance, and at the same time, the movable shaft 1194 inserted inside the connecting shaft 1192 is pressed, so that the concave ring on the top of the movable shaft 1194 moves upward to drive the locking bars 1195 mating on both sides. In this way, the filter plate 118 can be disassembled. The two locking bars 1195 in the unfolded state can be easily moved inward and retracted into the connecting shaft 1192. At the same time, when the moving shaft 1194 moves upward, it can also cooperate with the positioning shaft 1196 set at the top to achieve accurate upward movement. In addition, during the upward movement, it will help to compress the compression spring 1197 set outside the positioning shaft 1196. When the outer sides of the locking bars 1195 move inward and retract, the locking between the middle of the filter plate 118 and the lower end of the support tray 11733 will be released, so that the filter plate 118 can be easily moved downward and disassembled. When reassembling the filter plate 118 and the support tray 11733, the filter plate 118 can be pre-positioned and aligned with the lower end of the support tray 11733 through the mating hole 1191 in the middle. At this time, the connecting shaft 1192 can be vertically inserted into the filter plate 118 and the support tray 11733, so that the locking bars 1195 retracted on both sides of the upper end of the connecting shaft 1192 can be moved back into the lower end of the support tray 11733. At this time, the moving shaft 1194 can be released, so that the compression spring 1197 provided on the outside of the positioning shaft 1196 can rebound and push the moving shaft 1194 down. In this way, the moving shaft 1194... 94 will automatically move downwards, and through this downward movement, the locking bars 1195 that are mated on both sides of the concave ring will automatically move outwards and unfold. This allows the connecting shaft 1192 to be pulled down in advance, so that the unfolded locking bars 1195 on both sides abut against the lower interior of the support tray 11733. Then, the locking button 1193 installed on the outside of the rotating connecting shaft 1192 will move upwards and abut against the middle of the lower end of the filter plate 118 to lock it. This allows the filter plate 118 and the support tray 11733 to complete a quick docking and assembly activity through the cooperation of the locking button 1193 and the locking bars 1195 on both sides.

[0045] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for preparing a PCD brushed surface tool, characterized in that, Includes the following steps: S1. Raw material pretreatment: Polycrystalline diamond particles, Ti-Si additive powder, cobalt-based alloy powder, nano tungsten carbide particles and rare earth oxides are respectively subjected to surface activation treatment. S2. Precise ingredient proportions: Weigh the above materials according to the proportions, wherein the cobalt-based alloy binder is pre-treated by atomization powdering; S3. Gradient mixing: First, ball mill the nano-tungsten carbide particles and rare earth oxides for 20-30 minutes, then add Ti-Si additives and ball mill for 10-20 minutes, and finally add PCD particles and cobalt-based alloy powder and ball mill for 30-40 minutes. S4. Screening process: The mixture is placed inside the screening equipment and screened uniformly by vibration to obtain a uniform particle mixture. S5. Hot pressing sintering: The mixture is loaded into a graphite mold and sintered at a pressure of 5.5-6.5 GPa and a temperature of 1450-1550℃ for 15-25 minutes to obtain a milling cutter blank. S6. Post-processing: The sintered milling cutter blank is quenched, polished, and laser-processed to obtain the desired wire drawing milling cutter. The screening equipment used in step S4 is equipped with a crushing device, which includes a crushing roller. A vibrating brush assembly is installed at the lower end of the crushing roller. A filter plate is connected to the bottom of the vibrating brush assembly. A locking assembly is installed in the middle of the filter plate, and the locking assembly is connected to the lower middle part of the vibrating brush assembly. The vibrating brush assembly includes a protective shell connected to the lower end of the collection shell. A rotating shaft is inserted into the middle of the protective shell, and the top of the rotating shaft is connected to the crushing roller. A vibrating structure is connected to the bottom of the rotating shaft, and the vibrating structure is connected to the middle of the filter plate. A brushing structure is provided on the outer side of the lower end of the rotating shaft. The vibration structure includes a turntable, which is connected to the bottom of the rotating shaft. A ball is embedded in the lower end of the turntable, and the lower end of the ball abuts against the support tray. A groove is provided on the upper end of the support tray, and a spring is provided on the outside of the lower end of the support tray. The bottom of the support tray is connected to the filter plate. The brushing structure includes a main bevel gear, the middle of which is connected to the outer side of the lower end of the rotating shaft. Both sides of the main bevel gear are meshed with secondary bevel gears, which are connected to the inner sides of the protective shell. A rotating cylinder is connected to the middle of one side of the secondary bevel gear, and a transmission groove is formed on the outside of the rotating cylinder. A protective cover is provided on the outside of the rotating cylinder, and both sides of the protective cover are fixed to the housing and the protective shell, respectively. A sliding plate is embedded inside the transmission groove, and a movable seat is connected to the lower end of the sliding plate. The middle of the movable seat is connected to a guide rod, and both sides of the guide rod are fixed to the housing and the protective shell, respectively. A brush plate is installed at the bottom of the movable seat. The locking assembly includes a mating hole located at the middle of the upper part of the filter plate and connected to the lower end of the support tray. A connecting shaft is inserted into the middle of the lower end of the filter plate, and the upper end of the connecting shaft is inserted into the lower end of the support tray. A locking button is threaded onto the external part of the connecting shaft. A movable shaft is inserted inside the connecting shaft. Both sides of the upper end of the movable shaft are connected to locking bars. A positioning shaft is fixedly installed at the upper end of the movable shaft, and a compression spring is installed on the outside of the positioning shaft.

2. The method for preparing a PCD brushed finish tool according to claim 1, characterized in that, The laser processing in step S5 uses laser micromachining technology combined with high-precision CAD / CAM software to precisely design the micro-geometry of the cutting edge of the tool.

3. The method for preparing a PCD brushed finish tool according to claim 1, characterized in that, The screening equipment used in step S4 includes a support frame. A motor is installed on the left side of the support frame. The output end of the motor is connected to a pulley assembly, which is located at the rear left end of the support frame. The upper front end of the pulley assembly is connected to a rotating arm. The lower end of the rotating arm is rotatably connected to a connecting arm. The right side of the connecting arm is rotatably connected to a connecting frame. A screen plate is installed inside the connecting frame. The four sides of the bottom of the connecting frame abut against support wheels, which are installed on the upper right side of the support frame. The two outer sides of the connecting frame are connected to a stabilizing frame, and the bottom of the stabilizing frame is fixedly connected to the support frame. The support frame is fixed to the upper left side of the guide plate. A crushing device is installed on the right side of the connecting frame.

4. The method for preparing a PCD brushed finish tool according to claim 3, characterized in that, The crushing and processing device includes a housing, which is connected to the right side of the connecting frame. A cylinder is installed on the left side inside the housing. The upper end of the cylinder is connected to a connecting strip, and the connecting strip is fixedly connected to the right side of the screen plate. A servo motor is installed at the upper end inside the housing. The lower end of the servo motor is connected to the crushing roller. A material collection shell is provided opposite to the outside of the crushing roller and is installed inside the housing.

5. The method for preparing a PCD brushed finish tool according to claim 1, characterized in that, The number of balls along the bottom of the turntable is the same as the number of grooves on the upper end of the support tray, and the diameter of the balls is the same as the diameter of the grooves.

6. The method for preparing a PCD brushed finish tool according to claim 1, characterized in that, The upper end of the movable shaft is integrally provided with a concave ring, and the movable shaft is connected to the side of the lock bar through the concave ring.

7. The method for preparing a PCD brushed finish tool according to claim 1, characterized in that, The PCD brushing tool is composed of the following materials: Polycrystalline diamond particles are used as the primary cutting material. Ti-Si based additives, with a content of 3-8 wt%, are used to improve the toughness of materials; Cobalt-based alloy binder, with a content of 10-15 wt%, is used to enhance the interparticle bonding force; Nano-tungsten carbide particles, with a content of 5-8 wt%, are used to improve the hardness and thermal stability of materials. Rare earth oxides, with a content of 0.5-2 wt%, are used to refine grains and improve sintering performance.

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