High-precision matching machining process of mold and heat-conducting block

Abstract

The application relates to a high-precision matching machining process of a mold and a heat-conducting block, and relates to the technical field of gap matching machining processes, and comprises the following steps: step 1, a preliminary polishing treatment is respectively carried out on a first contact surface of the mold and a second contact surface of the heat-conducting block through polishing equipment, so that the first contact surface of the mold and the second contact surface of the heat-conducting block are preliminarily matched; step 2, the first contact surface of the mold and the second contact surface of the heat-conducting block are mutually buckled, and the mold and the heat-conducting block are respectively electrically connected with two poles of a spark machine pulse power supply; step 3, the spark machine is started, high temperature is generated at defects on the first contact surface and the second contact surface, defects on the first contact surface and the second contact surface are melted, and the gap between the first contact surface and the second contact surface is eliminated. In the case that high-precision polishing of the mold and the heat-conducting block is not needed, the matching precision between the mold and the heat-conducting block is improved, production cost is reduced, and production efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of clearance fit processing technology, and in particular to a high-precision fit processing technology for a mold and a heat-conducting block. Background Technology

[0002] A spark discharge machine is a type of machining equipment primarily used for electrical discharge machining. It is widely used in the manufacture of various metal molds and mechanical equipment. It is a special machining method that utilizes the electro-erosion effect generated by pulsed discharge between two electrodes immersed in a working fluid to remove conductive materials; it is also known as electrical discharge machining or electro-erosion machining. During EDM, the tool electrode and the workpiece are connected to the two poles of a pulsed power supply and immersed in the working fluid, or the working fluid is filled into the discharge gap. When the gap between the two electrodes reaches a certain distance, the pulsed voltage applied to the electrodes breaks down the working fluid, generating a spark discharge. A large amount of heat energy is instantaneously concentrated in the micro-channel of the discharge, with temperatures reaching over 10,000℃ and pressure changing drastically. This causes a small amount of metal material on the working surface to melt and vaporize instantly, exploding and splashing into the working fluid, where it rapidly condenses into solid metal particles, which are then carried away by the working fluid.

[0003] In the injection molding industry, mold temperature plays a decisive role in the quality of injection molded parts and injection time. Mold temperature affects the surface quality, flowability, shrinkage rate, injection cycle, and deformation of the product to varying degrees. If the mold temperature is too low, it will affect the shrinkage rate of the product, resulting in defects such as surface defects like streaks and large dimensional tolerances in the injection molded parts. Therefore, in injection molding production, heat-conducting blocks are needed to heat the mold to achieve stable quality of injection molded parts and optimize processing time.

[0004] In actual production, the heat-conducting block and the mold cannot be precisely matched due to tolerance limitations, resulting in a reduced contact area and decreased heat conduction. To address this issue, a common solution is to manually grind the contact surface between the heat-conducting block and the mold using a file or grinder. However, manual grinding is inefficient, cumbersome, and physically demanding. Furthermore, because the contact surface between the heat-conducting block and the mold is typically not a perfectly flat surface to increase the contact area and improve heat conduction, blind spots exist during manual grinding, making it difficult to accurately position the grinding area and control the amount of grinding. This results in low grinding precision, failing to meet the high-precision fit requirements between the mold and the heat-conducting block. Summary of the Invention

[0005] The purpose of this application is to provide a high-precision mating process for molds and heat-conducting blocks, which solves the problem that the existing manual grinding process is difficult to accurately position the grinding location and the grinding amount is not easy to control, resulting in low grinding accuracy and failing to meet the high-precision mating requirements of molds and heat-conducting blocks.

[0006] This application provides a high-precision machining process for the mold and the heat-conducting block, which adopts the following technical solution:

[0007] A high-precision machining process for fitting a mold and a heat-conducting block includes the following steps:

[0008] Step 1: Use a grinding machine to perform preliminary grinding on the first contact surface of the mold and the second contact surface of the heat-conducting block, so that the first contact surface of the mold and the second contact surface of the heat-conducting block are initially adapted.

[0009] Step 2: Connect the first contact surface of the mold to the second contact surface of the heat-conducting block, and then connect the mold and the heat-conducting block to the two poles of the EDM pulse power supply.

[0010] Step 3: Turn on the EDM machine to generate high temperature at the defects on the first and second contact surfaces, melting the defects on the first and second contact surfaces and eliminating the gap between the first and second contact surfaces.

[0011] By adopting the above technical solution, a pulse voltage is generated by the EDM machine, which generates a large amount of heat at the defects on the first and second contact surfaces, causing the defective parts to melt and eliminating the gap between the first and second contact surfaces, thereby greatly improving the fitting accuracy of the first and second contact surfaces.

[0012] Optionally, the first end face of the mold is provided with a groove, the bottom of the groove is provided with a first concave-convex surface, the first end face, the side of the groove and the first concave-convex surface form the first contact surface, the second end face of the heat-conducting block is provided with a truncated cone that fits into the groove, the end of the truncated cone is provided with a second concave-convex surface corresponding to the first concave-convex surface, the second end face of the heat-conducting block, the side of the truncated cone and the second concave-convex surface form the second contact surface.

[0013] By adopting the above technical solution, the first contact surface and the second contact surface are set as irregular surfaces, thereby increasing the contact surface between the mold and the heat-conducting block, and thus improving the heat conduction effect.

[0014] Optionally, the polishing equipment includes a brush mechanism and an electro-erosion processing mechanism. The brush mechanism includes a rotary drive assembly and a brush roller. The brush roller has bristles on its periphery. The rotary drive assembly is connected to the brush roller for driving the brush roller and the bristles to rotate.

[0015] In step 1, the preliminary polishing process includes the following steps: the brush roller and the bristles are driven to rotate by the rotary drive assembly to polish the first contact surface and the second contact surface respectively; after the polishing process is completed, the first contact surface and the second contact surface are electro-eroded by the electro-erosion processing mechanism respectively.

[0016] By adopting the above technical solution, the brushing mechanism can remove defects such as burrs and rust spots, and the electro-erosion processing mechanism can remove defects such as protrusions. The two work together to achieve preliminary grinding treatment of the first and second contact surfaces, which can effectively improve grinding efficiency and grinding effect.

[0017] Optionally, the grinding equipment further includes a vision positioning mechanism, and the electro-erosion processing mechanism includes a tool electrode. In step 1, the vision positioning mechanism locates the defects on the first contact surface and the second contact surface after the grinding treatment, and moves the tool electrode of the electro-erosion processing mechanism to the defect positions on the first contact surface and the second contact surface, respectively, and performs electro-erosion treatment on the defects on the first contact surface and the second contact surface.

[0018] By adopting the above technical solution, the defects on the first and second contact surfaces after the brushing process are located by the visual positioning mechanism, thereby significantly improving the accuracy of the electro-erosion processing mechanism.

[0019] Optionally, the visual positioning mechanism includes a 3D scanner. In step 1, the 3D scanner scans the first contact surface and the second contact surface after the brushing treatment and obtains 3D point cloud images of the first contact surface and the second contact surface. The 3D point cloud images are used to create 3D image models of the first contact surface and the second contact surface. The 3D image models of the first contact surface and the second contact surface are compared with a standard model. The parts that protrude from the surface of the first contact surface and the second contact surface under the standard model are defined as defects, and the 3D coordinate region of the defects is determined.

[0020] By adopting the above technical solution, the three-dimensional image model of the first contact surface and the three-dimensional image model of the second contact surface can be compared with the standard model, thereby accurately locating the three-dimensional coordinate area of ​​the defect.

[0021] Optionally, several path points are selected on the first contact surface and the second contact surface within the three-dimensional coordinate region of the defect, and the discharge end of the tool electrode is controlled to move sequentially between the several path points. At each path point, the defect portion on the first contact surface and the second contact surface is subjected to electro-erosion treatment.

[0022] By adopting the above technical solution, by selecting several path points on the first and second contact surfaces within the three-dimensional coordinate region of the defect, and controlling the discharge end of the tool electrode to move sequentially between the several path points, the defects at the path points can be electro-eroded one by one, thereby effectively improving the defect removal effect.

[0023] Optionally, the height difference between each path point and the corresponding point in the Z-axis direction of the standard model is calculated. When the discharge end of the tool electrode performs electro-erosion treatment on the defective parts on the first contact surface and the second contact surface, the tool electrode is controlled to feed along the Z-axis direction, and the feed amount is the height difference between the path point and the corresponding point in the Z-axis direction of the standard model.

[0024] By adopting the above technical solution, the height difference between each path point and the corresponding point in the Z-axis direction in the standard model is calculated, thereby determining the feed amount of the tool electrode along the Z-axis direction during electro-erosion treatment, and then performing corresponding electro-erosion removal according to the height of the defect protruding from the first contact surface and the second contact surface.

[0025] Optionally, the grinding equipment further includes a lifting mechanism, a transverse movement mechanism, a longitudinal movement mechanism, and a rotating mechanism. The lifting mechanism includes a lifting drive assembly and a lifting component. The lifting drive assembly is driven to the lifting component and is used to drive the lifting component to move vertically. The transverse movement mechanism includes a transverse drive assembly and a transverse component. The transverse drive assembly is disposed on the lifting component and is driven to the transverse component, and is used to drive the transverse component to move laterally. The longitudinal movement mechanism includes a longitudinal drive assembly disposed on the transverse component and a longitudinal component slidably disposed on the transverse component. The longitudinal drive assembly is driven to the longitudinal component and is used to drive the longitudinal component to move longitudinally. The rotating mechanism includes a rotating drive assembly and a rotating component. The rotating drive assembly is fixed to the longitudinal component, and the rotating component is rotatably disposed on the rotating drive assembly. The rotating drive assembly is driven to the rotating component and is used to drive the rotating component to rotate. The tool electrode is disposed on the longitudinal component, and the grinding brush mechanism is disposed on the rotating component.

[0026] In step 1, before the first contact surface and the second contact surface are respectively brushed by the rotation drive assembly driving the brush roller and the bristles to rotate, the bristles are driven to contact the first contact surface and the second contact surface by the lifting mechanism, the horizontal movement mechanism, the vertical movement mechanism and the rotation mechanism.

[0027] During the electro-erosion process of the first contact surface and the second contact surface, the discharge end of the tool electrode is driven to move sequentially between several path points by the lifting mechanism, the horizontal movement mechanism and the vertical movement mechanism, and the tool electrode is controlled to feed along the Z-axis.

[0028] By adopting the above technical solution, the brush mechanism can be driven to move freely within its stroke range through the lifting mechanism, the lateral movement mechanism, the longitudinal movement mechanism, and the rotation mechanism. The tool electrode can also be driven to move freely within its stroke range through the lifting mechanism, the lateral movement mechanism, and the longitudinal movement mechanism. This allows the brush mechanism and the tool electrode to be moved quickly to the processing position, thereby improving processing efficiency and accuracy.

[0029] Optionally, the electro-erosion machining mechanism further includes a working pool, a positioning component, and a vertical moving component. The positioning component is located in the working pool and is used to position and clamp the mold or heat-conducting block. The vertical moving component is located in the longitudinal moving member and is connected to the tool electrode for driving the tool electrode to move up and down vertically.

[0030] In step 1, before the first contact surface and the second contact surface are respectively brushed by driving the brush roller and the bristles to rotate through the rotary drive assembly, the mold or the heat-conducting block is positioned and clamped by the positioning assembly.

[0031] In step 1, before the first contact surface and the second contact surface are electro-eroded by the electro-erosion processing mechanism, the mold or the heat-conducting block is positioned and clamped by the positioning component.

[0032] In step 1, after the brushing process is completed, the tool electrode is moved below the brushing mechanism by the vertical movement component to perform electro-erosion treatment on the first contact surface and the second contact surface respectively.

[0033] By adopting the above technical solution, the working positions of the brush mechanism and the tool electrode can be switched by the vertical movement component, thereby avoiding mutual interference between the brush mechanism and the tool electrode when they are working separately.

[0034] Optionally, the polishing equipment further includes a transfer mechanism, which includes a transfer drive component and a moving component. The 3D scanner is fixed to the moving component, and the transfer drive component is connected to the moving component for driving the 3D scanner to move relative to the positioning component.

[0035] In step 1, before scanning the first and second contact surfaces after the brushing treatment with a 3D scanner, the 3D scanner is moved above the positioning component by a transfer drive component; after scanning the first and second contact surfaces after the brushing treatment with a 3D scanner, the 3D scanner is moved away from above the positioning component by a transfer drive component.

[0036] By adopting the above technical solution, the 3D scanner can be moved through the transfer mechanism, avoiding interference between the 3D scanner and the brushing mechanism and tool electrode.

[0037] In summary, this application includes at least one of the following beneficial technical effects: The high-precision mating processing technology of the mold and the heat-conducting block of this application first performs preliminary grinding on the first contact surface of the mold and the second contact surface of the heat-conducting block to make the first contact surface of the mold and the second contact surface of the heat-conducting block initially fit together. Then, the first contact surface of the mold and the second contact surface of the heat-conducting block are interlocked. The mold and the heat-conducting block are respectively electrically connected to the two poles of the EDM pulse power supply. The EDM is turned on, and high temperature is generated at the defects on the first and second contact surfaces to melt the defects on the first and second contact surfaces, eliminating the gap between the first and second contact surfaces. This eliminates the gap and makes the mold and the heat-conducting block fit tightly together. Without the need for manual high-precision grinding of the mold and the heat-conducting block, the fitting accuracy between the mold and the heat-conducting block is improved, the production cost is reduced, and the production efficiency is improved. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the mold structure;

[0039] Figure 2 This is a schematic diagram of the heat-conducting block.

[0040] Figure 3 This is a schematic diagram showing the first contact surface of the mold and the second contact surface of the heat-conducting block coming into contact with each other.

[0041] Figure 4 A first-person view structural diagram of the grinding equipment;

[0042] Figure 5 This is a structural schematic diagram of the grinding equipment from a second-view perspective;

[0043] Figure 6 for Figure 5 A magnified view of part A in the middle;

[0044] Figure 7 This is a structural schematic diagram of the grinding equipment from a third-person perspective.

[0045] In the picture,

[0046] 10. Mold; 11. First contact surface; 12. First end face; 13. Groove; 14. First concave-convex surface;

[0047] 20. Heat-conducting block; 21. Second contact surface; 22. Second end face; 23. Frustum; 24. Second concave-convex surface;

[0048] 30. Grinding equipment; 31. Grinding brush mechanism; 311. Rotary drive assembly; 3111. Second sprocket; 312. Grinding brush roller; 3121. First sprocket; 313. Brush bristles; 314. Chain;

[0049] 32. Electro-erosion machining mechanism; 321. Tool electrode; 322. Working pool; 323. Positioning assembly; 324. Vertical movement assembly; 325. Connecting seat;

[0050] 33. Visual positioning mechanism; 331. 3D scanner; 34. Lifting mechanism; 341. Lifting drive assembly; 3411. Frame; 3412. Vertical lead screw; 3413. Lifting motor; 3414. Vertical guide rod; 3415. Vertical guide sleeve; 342. Lifting component; 3421. Vertical slide bar; 3422. Vertical slide sleeve; 3423. Vertical threaded sleeve; 3424. Connecting frame;

[0051] 35. Transverse movement mechanism; 351. Transverse movement drive assembly; 3511. Base; 3512. Transverse lead screw; 3513. Transverse movement motor; 3514. Transverse guide rail; 352. Transverse movement component; 3521. Transverse slide; 3522. Transverse threaded sleeve;

[0052] 36. Longitudinal traverse mechanism; 361. Longitudinal traverse drive assembly; 3611. Longitudinal lead screw; 3612. Longitudinal traverse motor; 3613. Longitudinal guide rod; 362. Longitudinal traverse component; 3621. Longitudinal threaded sleeve; 3622. Longitudinal sliding sleeve;

[0053] 37. Transfer mechanism; 371. Transfer drive assembly; 372. Moving part; 373. Support; 38. Rotation mechanism; 381. Rotation drive assembly; 382. Rotating part; 383. Support. Detailed Implementation

[0054] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 This application will be described in further detail below.

[0055] Example 1

[0056] A high-precision machining process for fitting a mold and a heat-conducting block includes the following steps:

[0057] Step 1, refer to Figure 1 and Figure 2The first contact surface 11 of the mold 10 and the second contact surface 21 of the heat-conducting block 20 are initially polished by the polishing equipment 30, so that the first contact surface 11 of the mold 10 and the second contact surface 21 of the heat-conducting block 20 are initially adapted. The polishing equipment 30 can be a wire brush polisher, a grinding wheel polisher, a file, or other polishing devices or tools commonly used in the art. The initial polishing is mainly used to initially remove burrs, bumps, rust spots, and other defects protruding from the surfaces of the first contact surface 11 and the second contact surface 21.

[0058] Step 2, refer to Figure 3 The first contact surface 11 of the mold 10 and the second contact surface 21 of the heat-conducting block 20 are fastened together. The mold 10 and the heat-conducting block 20 are electrically connected to the two poles of the EDM pulse power supply. When the first contact surface 11 of the mold 10 and the second contact surface 21 of the heat-conducting block 20 are fastened together, there are defects on the first contact surface 11 and the second contact surface 21. These defects are mostly parts that protrude from the first contact surface 11 and the second contact surface 21. When the defects come into contact with the first contact surface 11 or the second contact surface 21, the first contact surface 11 and the second contact surface 21 cannot be tightly fastened together, resulting in a gap between the first contact surface 11 and the second contact surface 21.

[0059] Step 3: Turn on the EDM machine. High temperatures are generated at the defects on the first contact surface 11 and the second contact surface 21, melting the defects on the first contact surface 11 and the second contact surface 21 and eliminating the gap between the first contact surface 11 and the second contact surface 21. When the EDM machine is turned on, it generates a pulse voltage. Due to the extremely high resistance value at the contact position between the defect and the first contact surface 11 or the second contact surface 21, and due to the extremely high voltage at both ends of the contact position, a large amount of heat is generated, which eventually melts the defect at this point and eliminates the gap between the first contact surface 11 and the second contact surface 21. During the operation of the EDM machine, working fluid can be injected between the first contact surface 11 and the second contact surface 21 to carry away the melted defect particles.

[0060] Reference Figure 1 and Figure 2The first end face 12 of the mold 10 is provided with a groove 13, and the bottom of the groove 13 is provided with a first concave-convex surface 14. The first end face 12, the side of the groove 13, and the first concave-convex surface 14 form a first contact surface 11. The second end face 22 of the heat-conducting block 20 is provided with a truncated cone 23 that fits into the groove 13. The end of the truncated cone 23 is provided with a second concave-convex surface 24 that corresponds to the first concave-convex surface 14. The second end face 22 of the heat-conducting block 20, the side of the truncated cone 23, and the second concave-convex surface 24 form a second contact surface 21, which connects the first contact surface 11. The mold 10 is configured to form an irregular surface consisting of the first end face 12, the side of the groove 13, and the first concave-convex surface 14. The second contact surface 21 is configured to form an irregular surface consisting of the second end face 22, the side of the cone 23, and the second concave-convex surface 24. Therefore, when the first contact surface 11 of the mold 10 and the second contact surface 21 of the heat-conducting block 20 abut against each other, the contact surface between the mold 10 and the heat-conducting block 20 can be increased, thereby improving the heat conduction effect. The first contact surface 11 and the second contact surface 21 can also be configured to be wavy or other irregular shapes.

[0061] The implementation principle of the high-precision mating processing technology of mold and heat-conducting block in this embodiment is as follows: the first contact surface 11 of mold 10 and the second contact surface 21 of heat-conducting block 20 are initially polished to make the first contact surface 11 of mold 10 and the second contact surface 21 of heat-conducting block 20 initially fit together. Then, the first contact surface 11 and the second contact surface 21 are fastened together. The mold 10 and the heat-conducting block 20 are electrically connected to the two poles of the EDM pulse power supply respectively. High temperature is generated at the defects on the first contact surface 11 and the second contact surface 21, melting the defects on the first contact surface 11 and the second contact surface 21 and eliminating the gap between the first contact surface 11 and the second contact surface 21. Thus, the gap is eliminated and the mold 10 and the heat-conducting block 20 are tightly fitted. Without the need for manual high-precision polishing of mold 10 and heat-conducting block 20, the fitting accuracy between mold 10 and heat-conducting block 20 is improved, the production cost is reduced, and the production efficiency is improved.

[0062] Example 2

[0063] Reference Figure 4 and Figure 5 A high-precision machining process for mold and heat-conducting block. The difference between this embodiment and embodiment 1 is that the grinding equipment 30 includes a grinding brush mechanism 31 and an electro-erosion machining mechanism 32. The grinding brush mechanism 31 includes a rotary drive assembly 311 and a grinding brush roller 312. The periphery of the grinding brush roller 312 is provided with bristles 313. The rotary drive assembly 311 is connected to the grinding brush roller 312 for driving the grinding brush roller 312 and the bristles 313 to rotate.

[0064] In step 1, the preliminary grinding process includes the following steps: the grinding roller 312 and the bristles 313 are driven to rotate by the rotary drive assembly 311 to perform grinding and brushing treatment on the first contact surface 11 and the second contact surface 21 respectively. After the grinding and brushing treatment is completed, the first contact surface 11 and the second contact surface 21 are subjected to electro-erosion treatment by the electro-erosion processing mechanism 32 respectively. The electro-erosion processing mechanism 32 adopts an electric discharge machine, and the bristles 313 can be steel wire bristles. The bristles 313 are mainly used to remove easily removable defects such as burrs and rust spots, while the electro-erosion processing mechanism 32 is mainly used to remove defects such as protrusions that cannot be removed by the bristles 313.

[0065] Reference Figure 4 The grinding equipment 30 also includes a vision positioning mechanism 33, and the electro-erosion processing mechanism 32 includes a tool electrode 321. In step 1, the vision positioning mechanism 33 locates the defects on the first contact surface 11 and the second contact surface 21 after the grinding and brushing treatment, respectively. The tool electrode 321 of the electro-erosion processing mechanism 32 is moved to the defect positions on the first contact surface 11 and the second contact surface 21, respectively, and the defects on the first contact surface 11 and the second contact surface 21 are electro-eroded. The vision positioning mechanism 33 can be a monocular vision positioning system, a binocular vision positioning system, or a multi-view vision positioning system. The positioning method can be a positioning method based on a single frame image, a positioning method based on straight line features, a positioning method based on curve features, a positioning method based on two or more frames of images, or other positioning methods commonly used in the art. A three-axis moving module or a multi-degree-of-freedom robotic arm can be used to move the tool electrode 321 of the electro-erosion processing mechanism 32 to the defect positions on the first contact surface 11 and the second contact surface 21, respectively.

[0066] Reference Figure 4 The visual positioning mechanism 33 includes a 3D scanner 331. In step 1, the 3D scanner 331 scans the first contact surface 11 and the second contact surface 21 after the brushing treatment and obtains 3D point cloud images of the first contact surface 11 and the second contact surface 21. The 3D point cloud images are used to create 3D image models of the first contact surface 11 and the second contact surface 21. The 3D image models of the first contact surface 11 and the second contact surface 21 are compared with the standard model. The parts that protrude from the surface of the first contact surface 11 and the second contact surface 21 under the standard model are defined as defects. The 3D coordinate area of ​​the defects is determined. The 3D scanner 331 can be a photogrammetric 3D scanner or a 3D laser scanner.

[0067] Several path points are selected on the first contact surface 11 and the second contact surface 21 within the three-dimensional coordinate region of the defect. The discharge end of the tool electrode 321 is controlled to move sequentially between the several path points. At each path point, the defect part on the first contact surface 11 and the second contact surface 21 is subjected to electro-erosion treatment. The density of the path points on the first contact surface 11 and the second contact surface 21 can be set according to the accuracy of the electro-erosion treatment. The denser the path points, the higher the accuracy of the electro-erosion treatment. The XY axis coordinates of the path points are arranged in an equally spaced matrix.

[0068] The height difference between each path point and the corresponding point in the Z-axis direction in the standard model is calculated. When the discharge end of the tool electrode 321 performs electro-erosion treatment on the defective parts on the first contact surface 11 and the second contact surface 21, the tool electrode 321 is controlled to feed along the Z-axis direction. The feed amount is the height difference between the path point and the corresponding point in the Z-axis direction in the standard model. The feed amount of the tool electrode 321 at each path point can be divided into multiple step amounts according to the height difference. After each spark discharge, the tool electrode 321 advances one step amount along the Z-axis direction. When the feed amount is completed, the defect at that path point is removed by electro-erosion.

[0069] Reference Figure 4 and Figure 6The grinding equipment 30 also includes a lifting mechanism 34, a transverse movement mechanism 35, a longitudinal movement mechanism 36, and a rotating mechanism 38. The lifting mechanism 34 includes a lifting drive assembly 341 and a lifting member 342. The lifting drive assembly 341 is driven to the lifting member 342 and is used to drive the lifting member 342 to move vertically. The transverse movement mechanism 35 includes a transverse movement drive assembly 351 and a transverse movement member 352. The transverse movement drive assembly 351 is disposed on the lifting member 342 and is driven to the transverse movement member 352 and is used to drive the transverse movement member 352 to move laterally. The longitudinal movement mechanism 36 includes a longitudinal movement drive assembly 361 disposed on the transverse movement member 352 and a longitudinal movement member 362 slidably disposed on the transverse movement member 352. The longitudinal movement drive assembly 361 is driven to the longitudinal movement member 362 and is used to drive the longitudinal movement member 362 to move longitudinally. The rotating mechanism 38 includes a rotating drive assembly 381 and a rotating member. 382, Rotary drive assembly 381 is fixed to longitudinal moving member 362, rotating member 382 is rotatably mounted on rotary drive assembly 381, rotary drive assembly 381 is drive-connected to rotating member 382 for driving rotating member 382 to rotate, tool electrode 321 is mounted on longitudinal moving member 362, brushing mechanism 31 is mounted on rotating member 382, ​​the specific connection relationship between brushing mechanism 31 and rotating member 382 and the specific drive connection relationship between rotary drive assembly 311 and brushing roller 312 are as follows: rotating member 382 is provided with support 383, brushing roller 312 is rotatably mounted on support 383, one end of brushing roller 312 is provided with first sprocket 3121, rotary drive assembly 311 is rotary motor, rotary motor is fixed to support 383, output shaft of rotary motor is provided with second sprocket 3111, second sprocket 3111 is drive-connected to first sprocket 3121 through chain 314.

[0070] In step 1, before the first contact surface 11 and the second contact surface 21 are respectively brushed by rotating the brush roller 312 and the bristles 313 through the rotary drive assembly 311, the bristles 313 are moved to contact the first contact surface 11 and the second contact surface 21 by the lifting mechanism 34, the horizontal movement mechanism 35, the vertical movement mechanism 36 and the rotation mechanism 38.

[0071] During the electro-erosion process of the first contact surface 11 and the second contact surface 21 by the electro-erosion processing mechanism 32, the discharge end of the tool electrode 321 is driven to move sequentially between several path points by the lifting mechanism 34, the transverse movement mechanism 35 and the longitudinal movement mechanism 36, and the tool electrode 321 is controlled to feed along the Z-axis.

[0072] The grinding mechanism 31 and the tool electrode 321 can be driven to move along the Z-axis direction by the lifting mechanism 34, and can be driven to move along the X-axis direction by the transverse mechanism 35. The grinding mechanism 31 and the tool electrode 321 can be driven to move along the Y-axis direction by the longitudinal mechanism 36, thereby enabling the grinding mechanism 31 and the tool electrode 321 to move freely along three axes within the stroke range.

[0073] Reference Figure 7 The lifting drive assembly 341 can be a linear screw lifting module, a rack and pinion lifting module, or a linear hydraulic cylinder lifting module. In this embodiment, the lifting drive assembly 341 adopts a linear screw lifting module. More specifically, the lifting drive assembly 341 includes a frame 3411, a vertical screw 3412, and a lifting motor 3413. The frame 3411 is provided with a vertical guide rod 3414 and a vertical guide sleeve 3415. The lifting component 342 is provided with a vertical slide rod 3421, a vertical slide sleeve 3422, and a vertical threaded sleeve 3423. The vertical slide rod 3421 slides through the vertical screw. The guide sleeve 3415 and the vertical sliding sleeve 3422 are slidably sleeved on the vertical guide rod 3414. The vertical lead screw 3412 is rotatably mounted on the frame 3411 and screwed to the vertical threaded sleeve 3423. The lifting motor 3413 is fixed on the frame 3411 and is connected to the vertical lead screw 3412 for transmission. The vertical sliding rod 3421 is provided with a connecting frame 3424. The lifting motor 3413 can drive the vertical lead screw 3412 to rotate. Under the interaction between the vertical lead screw 3412 and the vertical threaded sleeve 3423, the lifting component 342 and the connecting frame 3424 can be lifted and lowered.

[0074] The lateral movement mechanism 35 can be a linear lead screw module, a rack and pinion module, or a linear synchronous belt module. In this embodiment, the lateral movement mechanism 35 adopts a linear lead screw module. More specifically, the lateral movement drive assembly 351 includes a base 3511, a transverse lead screw 3512, and a lateral movement motor 3513. The base 3511 is fixed to the connecting frame 3424 and is provided with a transverse guide rail 3514. The lateral movement component 352 is provided with a transverse slide block 3521 and a transverse threaded sleeve 3522. The transverse slide block 3521 is slidably disposed on the transverse guide rail 3514. The transverse lead screw 3512 is rotatably disposed on the base 3511 and is screwed to the transverse threaded sleeve 3522. The lateral movement motor 3513 is fixed to the base 3511 and is connected to the transverse lead screw 3512 for transmission. The transverse motor 3513 can drive the transverse lead screw 3512 to rotate. Under the interaction between the transverse lead screw 3512 and the transverse threaded sleeve 3522, the transverse moving component 352 moves along the transverse guide rail 3514.

[0075] The longitudinal movement mechanism 36 can be a linear lead screw module, a gear and rack module, or a linear synchronous belt module. In this embodiment, the longitudinal movement mechanism 36 adopts a linear lead screw module. More specifically, the longitudinal movement drive assembly 361 includes a longitudinal lead screw 3611 and a longitudinal movement motor 3612. The transverse movement member 352 is provided with a longitudinal guide rod 3613. The longitudinal movement member 362 is provided with a longitudinal threaded sleeve 3621 and a longitudinal sliding sleeve 3622. The longitudinal movement member 362 is slidably sleeved on the longitudinal guide rod 3613 through the longitudinal sliding sleeve 3622. The longitudinal lead screw 3611 is rotatably mounted on the transverse movement member 352 and screwed to the longitudinal threaded sleeve 3621. The longitudinal movement motor 3612 is fixed on the transverse movement member 352 and is connected to the longitudinal lead screw 3611 for transmission. The longitudinal motor 3612 can drive the longitudinal lead screw 3611 to rotate. Under the interaction between the longitudinal lead screw 3611 and the longitudinal threaded sleeve 3621, the longitudinal moving member 362 moves along the longitudinal guide rod 3613.

[0076] Reference Figure 4 The electro-erosion machining mechanism 32 also includes a working pool 322, a positioning component 323, and a vertical movement component 324. The positioning component 323 is located in the working pool 322 and is used to position and clamp the mold 10 or the heat-conducting block 20. The vertical movement component 324 is fixed to the longitudinal movement member 362 via a connecting seat 325 and is drively connected to the tool electrode 321 to drive the tool electrode 321 to move vertically up and down. The positioning component 323 can be a positioning chuck or other positioning and clamping fixtures commonly used in the art, and the vertical movement component 324 can be a linear hydraulic cylinder assembly, a linear pneumatic cylinder assembly, or other linear drive assemblies commonly used in the art.

[0077] In step 1, before the first contact surface 11 and the second contact surface 21 are respectively brushed by the rotation drive assembly 311 driving the brush roller 312 and the bristles 313 to rotate, the mold 10 or the heat-conducting block 20 is positioned and clamped by the positioning assembly 323.

[0078] In step 1, before the first contact surface 11 and the second contact surface 21 are electro-eroded by the electro-erosion processing mechanism 32, the mold 10 or the heat-conducting block 20 is positioned and clamped by the positioning component 323.

[0079] In step 1, after the brushing process is completed, the tool electrode 321 is moved to the bottom of the brushing mechanism 31 by the vertical moving component 324 to perform electro-erosion treatment on the first contact surface 11 and the second contact surface 21 respectively. In order to avoid the brushing mechanism 31 and the tool electrode 321 from interfering with each other when they are working, the working position of the brushing mechanism 31 and the tool electrode 321 is switched by the vertical moving component 324.

[0080] Reference Figure 4The grinding equipment 30 also includes a transfer mechanism 37, which includes a transfer drive component 371 and a moving component 372. The 3D scanner 331 is fixed to the moving component 372 via a bracket 373. The transfer drive component 371 is connected to the moving component 372 for transmission and is used to drive the 3D scanner 331 to move relative to the positioning component 323. The 3D scanner 331 can be moved through the transfer mechanism 37 to avoid interference between the 3D scanner 331 and the brushing mechanism 31 and the tool electrode 321.

[0081] In step 1, before scanning the first contact surface 11 and the second contact surface 21 after the brushing treatment by the 3D scanner 331, the 3D scanner 331 is moved above the positioning component 323 by the transfer drive component 371. After scanning the first contact surface 11 and the second contact surface 21 after the brushing treatment by the 3D scanner 331, the 3D scanner 331 is moved away from the positioning component 323 by the transfer drive component 371. Then, working fluid is injected into the working pool 322, and the mold 10 or the heat-conducting block 20 is immersed in the working fluid to facilitate the subsequent electro-erosion treatment of the tool electrode 321.

[0082] The transfer mechanism 37 can be a rotating module. The transfer drive component 371 is the rotating drive body of the rotating module, and the moving part 372 is the rotating table of the rotating module. The rotating module can drive the 3D scanner 331 to rotate and move, so as to realize the rapid movement of the 3D scanner 331.

[0083] The implementation principle of the high-precision matching processing technology of mold and heat-conducting block in this embodiment is as follows: In the preliminary grinding process in step 1, the mold 10 or heat-conducting block 20 is first positioned and clamped by the positioning component 323. Then, the position of the brushing mechanism 31 is adjusted by the lifting mechanism 34, the horizontal movement mechanism 35, the vertical movement mechanism 36 and the rotation mechanism 38. The brushing roller 312 and the bristles 313 are driven to rotate by the rotary drive component 311 to perform brushing treatment on the first contact surface 11 and the second contact surface 21 respectively. After the brushing process is completed, the 3D scanner 331 is moved above the mold 10 or the heat-conducting block 20 by the transfer mechanism 37. The 3D scanner 331 locates the defects on the first contact surface 11 or the second contact surface 21 after the brushing process. Then, the 3D scanner 331 is moved away from the mold 10 or the heat-conducting block 20 by the transfer mechanism 37, and working fluid is injected into the working pool 322. The mold 10 or the heat-conducting block 20 is immersed in the working fluid. The position of the tool electrode 321 is adjusted by the lifting mechanism 34, the horizontal movement mechanism 35, the vertical movement mechanism 36 and the vertical movement component 324. The tool electrode 321 is used to perform electro-erosion treatment on the first contact surface 11 or the second contact surface 21, completing the preliminary grinding process of the first contact surface 11 of the mold 10 and the second contact surface 21 of the heat-conducting block 20.

[0084] 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 high-precision machining process for fitting a mold and a heat-conducting block, characterized in that, Includes the following steps: Step 1: Use a grinding device (30) to perform preliminary grinding on the first contact surface (11) of the mold (10) and the second contact surface (21) of the heat-conducting block (20) respectively, so that the first contact surface (11) of the mold (10) and the second contact surface (21) of the heat-conducting block (20) are initially adapted. Step 2: Connect the first contact surface (11) of the mold (10) and the second contact surface (21) of the heat-conducting block (20) to each other, and connect the mold (10) and the heat-conducting block (20) to the two poles of the EDM pulse power supply respectively; Step 3: Turn on the EDM machine to generate high temperature at the defects on the first contact surface (11) and the second contact surface (21), melt the defects on the first contact surface (11) and the second contact surface (21), and eliminate the gap between the first contact surface (11) and the second contact surface (21). The first end face (12) of the mold (10) is provided with a groove (13), and the bottom of the groove (13) is provided with a first concave-convex surface (14). The first end face (12), the side of the groove (13) and the first concave-convex surface (14) form the first contact surface (11). The second end face (22) of the heat-conducting block (20) is provided with a truncated cone (23) that fits into the groove (13). The end of the truncated cone (23) is provided with a second concave-convex surface (24) that corresponds to the first concave-convex surface (14). The second end face (22) of the heat-conducting block (20), the side of the truncated cone (23) and the second concave-convex surface (24) form the second contact surface (21). The grinding equipment (30) includes a grinding brush mechanism (31) and an electro-erosion processing mechanism (32). The grinding brush mechanism (31) includes a rotary drive assembly (311) and a grinding brush roller (312). The grinding brush roller (312) has bristles (313) around its periphery. The rotary drive assembly (311) is connected to the grinding brush roller (312) for driving the grinding brush roller (312) and the bristles (313) to rotate. In step 1, the preliminary polishing process includes the following steps: the brush roller (312) and the bristles (313) are driven to rotate by the rotary drive assembly (311) to perform polishing on the first contact surface (11) and the second contact surface (21) respectively. After the polishing is completed, the first contact surface (11) and the second contact surface (21) are subjected to electro-erosion treatment by the electro-erosion processing mechanism (32).

2. The high-precision mating processing technology for a mold and a heat-conducting block according to claim 1, characterized in that, The grinding equipment (30) further includes a vision positioning mechanism (33), and the electro-erosion processing mechanism (32) includes a tool electrode (321). In step 1, the vision positioning mechanism (33) locates the defects on the first contact surface (11) and the second contact surface (21) after the grinding and brushing treatment, respectively. The tool electrode (321) of the electro-erosion processing mechanism (32) is moved to the defect positions on the first contact surface (11) and the second contact surface (21), respectively, and the defects on the first contact surface (11) and the second contact surface (21) are electro-eroded.

3. The high-precision mating processing technology for a mold and a heat-conducting block according to claim 2, characterized in that, The visual positioning mechanism (33) includes a three-dimensional scanner (331). In step 1, the three-dimensional scanner (331) scans the first contact surface (11) and the second contact surface (21) after the brushing treatment and obtains three-dimensional point cloud images of the first contact surface (11) and the second contact surface (21). The three-dimensional point cloud images are used to create a three-dimensional image model of the first contact surface (11) and the second contact surface (21). The three-dimensional image model of the first contact surface (11) and the three-dimensional image model of the second contact surface (21) are compared with the standard model. The part that protrudes from the surface of the first contact surface (11) and the second contact surface (21) under the standard model is defined as a defect, and the three-dimensional coordinate area of ​​the defect is determined.

4. The high-precision mating processing technology for a mold and a heat-conducting block according to claim 3, characterized in that, Several path points are selected on the first contact surface (11) and the second contact surface (21) within the three-dimensional coordinate region of the defect, respectively. The discharge end of the tool electrode (321) is controlled to move sequentially between the several path points, and the defective parts on the first contact surface (11) and the second contact surface (21) are subjected to electro-erosion treatment at each path point.

5. The high-precision mating processing technology for a mold and a heat-conducting block according to claim 4, characterized in that, Calculate the height difference between each path point and the corresponding point in the Z-axis direction in the standard model. When the discharge end of the tool electrode (321) performs electro-erosion treatment on the defective parts on the first contact surface (11) and the second contact surface (21), control the tool electrode (321) to feed along the Z-axis direction. The feed amount is the height difference between the path point and the corresponding point in the Z-axis direction in the standard model.

6. The high-precision mating processing technology for a mold and a heat-conducting block according to claim 5, characterized in that, The grinding equipment (30) further includes a lifting mechanism (34), a transverse movement mechanism (35), a longitudinal movement mechanism (36), and a rotating mechanism (38). The lifting mechanism (34) includes a lifting drive assembly (341) and a lifting component (342). The lifting drive assembly (341) is connected to the lifting component (342) and is used to drive the lifting component (342) to move vertically. The transverse movement mechanism (35) includes a transverse movement drive assembly (351) and a transverse movement component (352). The transverse movement drive assembly (351) is located on the lifting component (342) and is connected to the transverse movement component (352) to drive the transverse movement component (352) to move laterally. The longitudinal movement mechanism (36) includes a rotating mechanism located on the transverse movement component (352). The longitudinal drive assembly (361) and the longitudinal member (362) slidably disposed on the transverse member (352) are provided. The longitudinal drive assembly (361) is connected to the longitudinal member (362) for driving the longitudinal member (362) to translate longitudinally. The rotating mechanism (38) includes a rotating drive assembly (381) and a rotating member (382). The rotating drive assembly (381) is fixed to the longitudinal member (362), and the rotating member (382) is rotatably disposed on the rotating drive assembly (381). The rotating drive assembly (381) and the rotating member (382) are connected for driving the rotating member (382) to rotate. The tool electrode (321) is disposed on the longitudinal member (362), and the brushing mechanism (31) is disposed on the rotating member (382). In step 1, before the first contact surface (11) and the second contact surface (21) are respectively brushed by the rotation drive assembly (311) driving the brush roller (312) and the bristles (313) to rotate, the bristles (313) are driven to contact the first contact surface (11) and the second contact surface (21) by the lifting mechanism (34), the horizontal movement mechanism (35), the vertical movement mechanism (36) and the rotation mechanism (38). During the electro-erosion process of the first contact surface (11) and the second contact surface (21) by the electro-erosion processing mechanism (32), the discharge end of the tool electrode (321) is driven to move sequentially between several path points by the lifting mechanism (34), the horizontal movement mechanism (35) and the vertical movement mechanism (36), and the tool electrode (321) is controlled to feed along the Z-axis.

7. The high-precision mating processing technology for a mold and a heat-conducting block according to claim 6, characterized in that, The electro-erosion machining mechanism (32) further includes a working pool (322), a positioning component (323), and a vertical moving component (324). The positioning component (323) is located in the working pool (322) and is used to position and clamp the mold (10) or the heat-conducting block (20). The vertical moving component (324) is located in the longitudinal moving member (362) and is connected to the tool electrode (321) for driving the tool electrode (321) to move up and down vertically. In step 1, before the first contact surface (11) and the second contact surface (21) are respectively brushed by the rotation drive assembly (311) driving the brush roller (312) and the bristles (313) to rotate, the mold (10) or the heat-conducting block (20) is positioned and clamped by the positioning assembly (323). In step 1, before the first contact surface (11) and the second contact surface (21) are electro-eroded by the electro-erosion processing mechanism (32), the mold (10) or the heat-conducting block (20) is positioned and clamped by the positioning component (323). In step 1, after the brushing process is completed, the tool electrode (321) is moved to the bottom of the brushing mechanism (31) by the vertical moving component (324) to perform electro-erosion treatment on the first contact surface (11) and the second contact surface (21) respectively.

8. The high-precision mating processing technology for a mold and a heat-conducting block according to claim 7, characterized in that, The polishing equipment (30) also includes a transfer mechanism (37), which includes a transfer drive assembly (371) and a moving part (372). The three-dimensional scanner (331) is fixed to the moving part (372). The transfer drive assembly (371) is connected to the moving part (372) for driving the three-dimensional scanner (331) to move relative to the positioning assembly (323). In step 1, before scanning the first contact surface (11) and the second contact surface (21) after the brushing treatment by the three-dimensional scanner (331), the three-dimensional scanner (331) is moved above the positioning component (323) by the transfer drive component (371); after scanning the first contact surface (11) and the second contact surface (21) after the brushing treatment by the three-dimensional scanner (331), the three-dimensional scanner (331) is moved away from the positioning component (323) by the transfer drive component (371).

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