Testing device and grinding-in debugging method for automobile stamping die

Abstract

The invention relates to the field of testing, and provides a testing device for an automobile stamping die, which comprises a detection table, and the detection table is connected with a clamping mechanism, an oil coating mechanism and a pressing mechanism. The clamping mechanism comprises a bidirectional threaded rod and two clamps, the two clamps are slidably connected to the detection table, the bidirectional threaded rod is rotatably connected to the detection table, a first threaded hole is formed in each clamp, the bidirectional threaded rod is in threaded fit with the inner wall of the first threaded hole, and a driving mechanism is connected to the bidirectional threaded rod. According to the device, automatic color developing agent smearing and rapid clamping and fixing of the lower die are achieved through linkage of the same driving mechanism, the die assembly testing efficiency and the color developing agent utilization rate are improved while manual operation is reduced, and the device can be conveniently and continuously used for multiple times.

Description

Technical Field

[0001] This invention relates to the field of testing technology, and specifically to a testing device and a method for adjusting and configuring automotive stamping dies. Background Technology

[0002] In the production process of automotive stamping dies, it is usually necessary to conduct a die-fitting test after the die is processed to check the fitting accuracy of the upper and lower dies and the processing quality.

[0003] In the prior art, before mold closing test, a colorant is usually applied to the surface of the lower mold by hand using a brush. The contact condition of the mold is judged by the color traces. However, this manual application method has low application efficiency, increases working time and labor intensity, and can hardly meet the requirements of testing efficiency in the production process of automotive stamping dies. In addition, the lower mold needs to be fixed to the test bench with matching bolts, which requires manual adjustment of each bolt, further reducing testing efficiency and increasing the labor intensity of operators.

[0004] Therefore, it is necessary to provide a testing device that can automatically apply colorant to the lower mold before mold closing test, can be used multiple times, and facilitates the fixing of the lower mold, so as to improve production testing efficiency. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention aims to provide a testing device and a method for adjusting and configuring automotive stamping dies. To solve these problems, this invention employs the following technical solution: A testing device for automotive stamping dies includes a testing platform, on which a clamping mechanism, an oiling mechanism, and a pressing mechanism are connected; The clamping mechanism includes a bidirectional threaded rod and two clamps. The two clamps are slidably connected to the testing table, and the bidirectional threaded rod is rotatably connected to the testing table. A threaded hole is opened on the clamp, and the bidirectional threaded rod and the inner wall of the threaded hole are threadedly engaged. A drive mechanism is connected to the bidirectional threaded rod.

[0006] Optionally, the drive mechanism includes a throttle and a gear, the gear being fixedly connected to the bidirectional threaded rod, and the throttle being rotatably connected to the gear. The oiling mechanism includes a second gear, an accelerator, a one-way threaded rod, a movable seat, and a loading box. The accelerator and the loading box are both connected to the testing platform. The second gear is fixed to the input shaft of the accelerator and meshes with the first gear. The one-way threaded rod is fixed to the output shaft of the accelerator and rotatably connected to the testing platform. The movable seat is slidably connected to the testing platform. The movable seat has a second threaded hole, and the one-way threaded rod and the second threaded hole are threadedly engaged. The movable seat is equipped with a movable coating mechanism, and the loading box is filled with a color developer.

[0007] Optionally, the movable applicator includes a wedge applicator, a self-locking device, and an elastic element. The wedge applicator is slidably connected to the movable seat, and the self-locking device is fixedly connected to the movable seat. The wedge applicator is connected to the self-locking device through the elastic element. The bottom wall of the self-locking device has a self-locking groove, and a pressing self-locking component is provided in the self-locking groove. The top wall of the wedge applicator is fixedly connected to a self-locking head that is adapted to the pressing self-locking component, and the bottom wall of the wedge applicator is connected to bristles. The oiling mechanism also includes wedge block one and wedge block two fixed to the testing table.

[0008] Optionally, a wedge-shaped oil scraper is fixedly connected to the testing platform, and the wedge-shaped oil scraper extends above the loading box.

[0009] Optionally, a striking body is connected to the testing platform via an elastic element.

[0010] Optionally, a sliding cover is slidably connected to the loading box, the sliding cover is connected to the loading box via an elastic element, and an extension strip is fixedly connected to the sliding cover.

[0011] Optionally, a damping slide rail is connected to the loading box, and the sliding cover is slidably connected to the damping slide rail.

[0012] Optionally, the throttle is located in a non-central position of the first gear.

[0013] Optionally, the testing platform is provided with a placement slot, and the clamp is slidably connected to the placement slot.

[0014] A method for fitting and adjusting an automotive stamping die, comprising using a testing device for an automotive stamping die to perform a mold closing test on the machined upper and lower dies, the testing steps including: Step 1: Connect the upper mold and the lower pressing mechanism; Step 2: Use the clamping mechanism to clamp and fix the lower mold; Step 3: Apply color developer to a large area of ​​the lower mold using the oiling mechanism; Step 4: Manually brush the lower mold with developer; Step 5: The pressing mechanism performs a mold closing test on the upper and lower molds; Step 6: Perform CNC milling on the upper or lower mold based on the test results.

[0015] The present invention has the following beneficial effects: This application features an oiling mechanism on the testing platform, driven by a throttle, creating a linked transmission structure that moves the moving parts and automatically applies developer to the lower die. Simultaneously, the combination of a wedge structure and a self-locking structure allows the oiling components to automatically complete the actions of dipping, scraping, applying, and resetting at different positions, avoiding the inefficiency caused by repeated manual brushing. The scraping and tapping mechanism allows excess developer to flow back and be reused, preventing excessive coating thickness from affecting test results and avoiding waste, thus enabling the device to be used multiple times. Furthermore, this application includes a clamping mechanism on the testing platform, consisting of a bidirectional threaded structure and clamping components, driven by a single throttle. This allows the clamping components to move synchronously and in opposite directions, achieving rapid clamping of the lower die, significantly simplifying the die installation and positioning process. The clamping action is also linked to the oiling process, reducing manual intervention, improving overall testing continuity and operational efficiency, and reducing operator workload. This technology is suitable for high-frequency fitting and batch testing applications of automotive stamping dies. Attached Figure Description

[0016] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0017] Figure 1 This is a flowchart of a method for grinding, fitting, and debugging automotive stamping dies according to the present invention; Figure 2 This is a schematic diagram of the testing device for an automotive stamping die according to the present invention; Figure 3 This is a schematic diagram of the test device for an automobile stamping die of the present invention, omitting the pressing mechanism; Figure 4 This is a schematic diagram of the structure of a testing device for an automotive stamping die of the present invention, omitting one angle of the pressing mechanism; Figure 5 This is a schematic diagram of the test device for an automotive stamping die of the present invention, omitting the pressing mechanism, from another angle. Figure 6 This is a schematic diagram of the self-locking device in this invention; Figure 7 This is a schematic diagram of the wedge-shaped applicator and sliding cover in this invention.

[0018] Reference numerals: 1. Testing table; 2. Pressing mechanism; 3. Clamp; 4. Bidirectional threaded rod; 5. Turning handle; 6. Gear 1; 7. Gear 2; 8. Accelerator; 9. Unidirectional threaded rod; 10. Movable seat; 11. Wedge applicator; 12. Brush bristles; 13. Self-locking head; 14. Self-locking device; 15. Elastic element 1; 16. Wedge block 1; 17. Wedge block 2; 18. Wedge scraper; 19. Sliding cover; 20. Elastic element 2; 21. Striking body; 22. Elastic element 3; 23. Extension strip; 24. Loading box; 25. Self-locking groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the addition of "a," "b," "c," and "d" after the component names is for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] like Figures 2-5 As shown, a testing device for automotive stamping dies includes a testing platform 1, on which a clamping mechanism, an oiling mechanism, and a pressing mechanism 2 are connected; The pressing mechanism 2 is used to connect to the upper mold. The pressing mechanism 2 may be equipped with an intelligent pressure sensor to detect the pressing force.

[0024] The clamping mechanism includes a bidirectional threaded rod 4 and two clamps 3. The two clamps 3 are slidably connected to the testing table 1, and the bidirectional threaded rod 4 is rotatably connected to the testing table 1. Each clamp 3 has a threaded hole, and the bidirectional threaded rod 4 is threaded into the inner wall of the threaded hole. A drive mechanism is connected to the bidirectional threaded rod 4. The bidirectional threaded rod 4 has bidirectional threads so that the two clamps 3 always move in opposite directions.

[0025] To facilitate easy operation, the drive mechanism includes a throttle 5 and a gear 6. The gear 6 is fixedly connected to the bidirectional threaded rod 4, and the throttle 5 is rotatably connected to the gear 6. A silicone sleeve can be provided on the throttle 5 to increase the friction when the hand contacts it, so as to facilitate rotation. Regarding the further configuration of the oiling mechanism, the oiling mechanism includes a second gear 7, an accelerator 8, a one-way threaded rod 9, a movable seat 10, and a loading box 24. The accelerator 8 and the loading box 24 are both connected to the testing table 1. The second gear 7 is fixedly connected to the input shaft of the accelerator 8 and meshes with the first gear 6. The one-way threaded rod 9 is fixedly connected to the output shaft of the accelerator 8 and rotatably connected to the testing table 1. The movable seat 10 is slidably connected to the testing table 1. The movable seat 10 has a second threaded hole, and the one-way threaded rod 9 and the second threaded hole are threadedly engaged. The movable seat 10 is equipped with a movable coating mechanism, and the loading box 24 is filled with a color developer.

[0026] Accelerator 8 can be a planetary gear accelerator, and the colorant can be blue lead oil or red lead oil according to the actual situation. Optionally, loading box 24 and sliding cover 19 can be made of waste recycled plastic or recycled plastic materials to realize the resource utilization of plastic waste, reduce manufacturing costs and meet energy conservation and environmental protection requirements.

[0027] like Figures 6-7 As shown, the specific configuration of the movable applicator mechanism is as follows: the movable applicator mechanism includes a wedge applicator 11, a self-locking device 14, and an elastic element 15. The wedge applicator 11 is slidably connected to the movable seat 10, and the self-locking device 14 is fixedly connected to the movable seat 10. The wedge applicator 11 is connected to the self-locking device 14 through the elastic element 15. The bottom wall of the self-locking device 14 has a self-locking groove 25, and a pressing self-locking component is provided in the self-locking groove 25. The top wall of the wedge applicator 11 is fixedly connected to a self-locking head 13 that is adapted to the pressing self-locking component. The bottom wall of the wedge applicator 11 is connected to a brush bristle 12. The oiling mechanism also includes a wedge block 16 and a wedge block 17 fixed to the testing table 1.

[0028] To prevent excessive developer from adhering to the brush bristles 12 and affecting the coating quality and thus the accuracy of the test, a wedge-shaped scraper 18 is fixedly connected to the test platform 1. The wedge-shaped scraper 18 extends above the loading box 24 to facilitate the return of the developer to the loading box 24, preventing waste and ensuring easy cleaning later.

[0029] To further facilitate the return of more color developer to the loading tank 24, a striking body 21 is connected to the testing platform 1 via an elastic element 20. The striking body 21 is used to periodically strike the wedge-shaped oil scraper 18 during movement, thereby shaking off the attached color developer. The striking body 21 can be made of metal or high-strength engineering plastic.

[0030] To prevent the color developer from reacting with substances in the air and deteriorating or volatilizing, thus affecting personnel health, when the color developer is not used, a sliding cover 19 is slidably connected to the loading box 24. The sliding cover 19 is connected to the loading box 24 through an elastic element 22, and an extension strip 23 is fixedly connected to the sliding cover 19.

[0031] Furthermore, a damping slide rail is connected to the loading box 24, and the sliding cover 19 is slidably connected to the damping slide rail. The damping slide rail is used to limit the moving speed of the sliding cover 19 and prevent the sliding cover 19 from quickly resetting and affecting the backflow of the color developer.

[0032] Note that the throttle 5 is located at the off-center position of the gear 6. This off-center setting is used to create an eccentric drive effect, which makes it easier for the operator to apply force and improves the driving feel.

[0033] In one optional configuration, the testing table 1 has a placement slot, and the clamp 3 is slidably connected to the placement slot. The clamp 3 can be configured as an L-shape.

[0034] In addition, intelligent visual inspection devices, such as intelligent cameras, can be installed on or outside the inspection station 1 to record and save the inspection process.

[0035] like Figure 1 As shown, a method for adjusting and configuring an automotive stamping die is described. Using a testing device for automotive stamping dies, a mold-fitting test is performed on the machined upper and lower dies. The upper and lower dies can be used to manufacture various alloy automotive parts (such as high-quality, high-strength aluminum alloys, copper alloys, etc.). The testing steps include: Step 1: Connect the upper mold and the lower pressing mechanism 2; Step 2: Use the clamping mechanism to clamp and fix the lower mold; Step 3: Apply color developer to a large area of ​​the lower mold using the oiling mechanism; Step 4: Manually brush the lower mold with developer; Step 5: The pressing mechanism 2 performs a mold closing test on the upper and lower molds; Step 6: Perform CNC milling on the upper or lower mold based on the test results.

[0036] Implementation process: In the initial state, the self-locking head 13 is inserted into the self-locking groove 25 and locked by pressing the self-locking component. The wedge applicator 11 is located between the wedge scraper 18 and the tapping body 21. The sliding cover 19 seals the loading box 24 to isolate the color developer from the outside world and prevent the color developer from evaporating and deteriorating.

[0037] Connect the upper mold and the lower pressing mechanism 2, place the lower mold in the placement slot and between the two clamps 3, and rotate the handle 5 to drive the gear 6 and the double-threaded rod 4 to rotate. Due to the double-threaded design of the double-threaded rod 4, the two clamps 3 can always maintain opposite movements. The gear 6 drives the gear 7 to rotate. After being accelerated by the accelerator 8, the unidirectional threaded rod 9 rotates rapidly, thereby moving the movable seat 10.

[0038] First, the wedge applicator 11 moves towards the wedge block 16. The movable seat 10 pushes the extension bar 23, causing the sliding cover 19 to overcome the elastic force of the elastic element 22 and move along the damping slide rail. This releases the sliding cover 19 from the sealing of the loading box 24, allowing the brush bristles 12 to be coated with the developer. The wedge applicator 11 and the wedge block 16 come into contact. The wedge applicator 11 moves a short distance along the inclined surface of the wedge block 16, thereby releasing the self-locking head 13 and locking the self-locking component. Then, the handle 5 is reversed, causing the movable seat 10 to move towards the accelerator 8. The two clamps 3 move towards each other and gradually approach the lower mold. After the wedge applicator 11 is separated from the wedge block 16, it moves downward under the elastic force of the elastic element 15, and the brush bristles 12 are inserted into the loading box 24 to be coated with the developer.

[0039] Then the wedge applicator 11 and the wedge scraper 18 come into contact. The wedge applicator 11 moves up along the inclined surface of the wedge scraper 18, and the bristles 12 come into contact with the top wall of the wedge scraper 18. Due to the softness of the bristles 12, the bristles 12 will bend and pass over the wedge scraper 18. At the same time, some of the developer on the bristles 12 will be scraped onto the wedge scraper 18 to prevent the developer from being too thick when applying developer to the lower mold later, which would affect the test quality. The developer on the wedge scraper 18 flows back into the loading box 24 under the action of gravity to prevent waste, so that it can be reused multiple times later. After the wedge applicator 11 passes over the wedge scraper 18, it moves downward under the action of the elastic member 15. The sliding cover 19 is reset under the elastic force of the elastic element 22, which seals the colorant in the loading box 24 and isolates it from the outside air, preventing the colorant from being contaminated and volatilized. The damping force of the damping slide rail can reduce the reset speed of the sliding cover 19, so that the colorant on the wedge-shaped scraper 18 has more time to flow back into the loading box 24.

[0040] As the wedge applicator 11 continues to move toward the accelerator 8, it pushes the striking body 21, causing the elastic element 20 to bend. The striking body 21 passes through the bottom wall of the wedge applicator 11. After the wedge applicator 11 separates from the striking body 21, the striking body 21 swings under the rebound force of the elastic element 20, thereby causing the striking body 21 to strike the wedge scraper 18 multiple times to shake off the color developer on the wedge scraper 18, allowing more color developer to flow back into the loading box 24 to prevent waste.

[0041] The wedge applicator 11 continues to move towards the accelerator 8, and the brush 12 applies the colorant to the lower mold. After the wedge applicator 11 and the second wedge block 17 come into contact, the wedge applicator 11 moves up along the inclined surface of the second wedge block 17. After the bottom wall of the wedge applicator 11 and the top wall of the second wedge block 17 come into contact, the self-locking head 13 inserts into the self-locking groove 25 and presses the self-locking component to lock. Then the wedge applicator 11 moves a short distance towards the accelerator 8, so that the clamp 3 clamps the lower mold.

[0042] The developer has been applied to most areas of the lower mold by brush 12. Then, the developer is manually applied to some areas of the lower mold, which greatly shortens the operation time of applying the developer.

[0043] Then, the pressing mechanism 2 is controlled to drive the upper and lower molds to perform a mold closing test. The pressing mechanism 2 is equipped with an intelligent pressure sensor that can detect the pressing force in real time.

[0044] After the test is completed, the pressing mechanism 2 drives the upper mold to move upward, and then the reverse handle 5 causes the clamp 3 to release the clamp on the lower mold. The wedge applicator 11 moves towards the wedge block 16. Since the wedge applicator 11 is locked in a higher position, the wedge applicator 11 will not come into contact with any other parts when it is reset, thus completing the reset of the wedge applicator 11.

[0045] The advantages of this invention are as follows: By setting an oiling mechanism driven by a throttle 5 on the testing table 1, the gear 6, gear 7, accelerator 8 and one-way threaded rod 9 form a linkage transmission structure, thereby driving the movable seat 10 and the wedge applicator 11 to move, realizing the automatic application of colorant to the lower mold by the brush 12; at the same time, by utilizing the cooperation of wedge block 16, wedge block 17 and self-locking device 14 with self-locking head 13, the wedge applicator 11 can automatically complete the oiling, scraping, application and resetting actions at different work positions, avoiding the problem of low efficiency caused by repeated manual brushing; In addition, through the cooperation of the wedge-shaped scraper 18, the tapping body 21 and the elastic element 20, excess developer is returned to the loading box 24 for reuse. This improves the coating efficiency and effectively prevents the adverse effects of excessively thick developer coating on the test results. It also prevents excessive developer from adhering to the wedge-shaped scraper 18 and causing waste. The sliding cover 19 is opened and closed by the movable seat 10 to expose and isolate the developer, preventing contamination and allowing for multiple consecutive uses. This application establishes a clamping mechanism consisting of a bidirectional threaded rod 4 and two clamps 3 on the testing table 1, driven centrally by a throttle 5. This mechanism ensures that the two clamps 3 maintain synchronous and opposite movements under the action of the bidirectional threaded structure, thereby achieving rapid clamping of the lower die. Compared to the traditional method of adjusting bolts one by one, this significantly simplifies the installation and positioning process of the lower die. Simultaneously, the clamping action and the movement of the oiling mechanism are linked through the same drive path, allowing the lower die to directly enter the mold-closing test state after the colorant is applied. This reduces intermediate manual intervention steps, improves overall test continuity and work efficiency, and significantly reduces the labor intensity of operators. It is suitable for high-frequency fitting and batch testing scenarios of automotive stamping dies.

[0046] The components, modules, mechanisms, and devices in this invention that are not described in detail are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A testing device for automotive stamping dies, characterized in that, It includes a testing table (1), on which a clamping mechanism, an oiling mechanism and a pressing mechanism (2) are connected; The clamping mechanism includes a bidirectional threaded rod (4) and two clamps (3). The two clamps (3) are slidably connected to the testing table (1). The bidirectional threaded rod (4) is rotatably connected to the testing table (1). A threaded hole is provided on the clamp (3). The bidirectional threaded rod (4) and the inner wall of the threaded hole are threaded together. A drive mechanism is connected to the bidirectional threaded rod (4).

2. The testing device for automotive stamping dies according to claim 1, characterized in that, The drive mechanism includes a throttle (5) and a gear (6), the gear (6) being fixedly connected to the bidirectional threaded rod (4), and the throttle (5) being rotatably connected to the gear (6); The oiling mechanism includes a second gear (7), an accelerator (8), a one-way threaded rod (9), a movable seat (10), and a loading box (24). The accelerator (8) and the loading box (24) are both connected to the testing table (1). The second gear (7) is fixed to the input shaft of the accelerator (8). The second gear (7) meshes with the first gear (6). The one-way threaded rod (9) is fixed to the output shaft of the accelerator (8). The one-way threaded rod (9) is rotatably connected to the testing table (1). The movable seat (10) is slidably connected to the testing table (1). The movable seat (10) has a second threaded hole. The one-way threaded rod (9) and the second threaded hole are threaded together. The movable seat (10) has a movable coating mechanism. The loading box (24) is filled with a color developer.

3. The testing device for automotive stamping dies according to claim 2, characterized in that, The active coating mechanism includes a wedge-shaped applicator (11), a self-locking device (14), and an elastic element (15). The wedge-shaped applicator (11) is slidably connected to the movable seat (10), and the self-locking device (14) is fixedly connected to the movable seat (10). The wedge-shaped applicator (11) is connected to the self-locking device (14) through the elastic element (15). The bottom wall of the self-locking device (14) is provided with a self-locking groove (25), and a pressing self-locking component is provided in the self-locking groove (25). The top wall of the wedge-shaped applicator (11) is fixedly connected with a self-locking head (13) that is compatible with the pressing self-locking component. The bottom wall of the wedge-shaped applicator (11) is connected with bristles (12). The oiling mechanism also includes a wedge block one (16) and a wedge block two (17) fixed to the testing table (1).

4. The testing device for automotive stamping dies according to claim 3, characterized in that, A wedge-shaped oil scraper (18) is fixedly attached to the testing platform (1), and the wedge-shaped oil scraper (18) extends above the loading box (24).

5. The testing device for automotive stamping dies according to claim 4, characterized in that, A striking body (21) is connected to the testing table (1) via an elastic element (20).

6. The testing device for automotive stamping dies according to claim 5, characterized in that, The loading box (24) is slidably connected to a sliding cover (19), which is connected to the loading box (24) via an elastic element (22). An extension strip (23) is fixedly connected to the sliding cover (19).

7. The testing device for automotive stamping dies according to claim 6, characterized in that, The loading box (24) is connected to a damping slide rail, and the sliding cover (19) is slidably connected to the damping slide rail.

8. The testing device for automotive stamping dies according to claim 7, characterized in that, The throttle (5) is located in the off-center position of the gear (6).

9. The testing device for automotive stamping dies according to claim 8, characterized in that, The testing platform (1) has a placement slot, and the clamp (3) is slidably connected to the placement slot.

10. A method for grinding, fitting, and adjusting automotive stamping dies, characterized in that, Using the testing device for automotive stamping dies according to any one of claims 1-9, a die-fitting test is performed on the machined upper and lower dies. The testing steps include: Step 1: Connect the upper mold and the lower pressing mechanism (2); Step 2: Use the clamping mechanism to clamp and fix the lower mold; Step 3: Apply color developer to a large area of ​​the lower mold using the oiling mechanism; Step 4: Manually brush the lower mold with developer; Step 5: The pressing mechanism (2) performs a mold closing test on the upper and lower molds; Step 6: Perform CNC milling on the upper or lower mold based on the test results.

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