Anti-cracking die punching device based on metal workpiece machining

Abstract

The invention discloses an anti-cracking stamping die device based on metal workpiece machining, which relates to the technical field of stamping dies and comprises an upper backing plate, a lower backing plate, a lower die holder, a movable module, a step surface, an upper die holder, a punch, a shifting mechanism and a lubricating mechanism. According to the stamping die, the shifting mechanism and the lubricating mechanism are arranged, a gap is formed between the two movable die blocks before stamping, the lubricating mechanism can spray lubricating oil to the surface of a metal workpiece through the gap in the stamping process, and the lubricating oil is sputtered to the surface of a cavity through the sputtering effect; in this way, the surface of the cavity and the surface of the metal workpiece can be lubricated at the same time, the metal workpiece cannot be scratched or cracked during stamping, the lubricating mechanism is triggered to act through the action of the shifting mechanism, and therefore waste of lubricating oil can be reduced through the lubricating mechanism.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, specifically to a crack-resistant stamping die device based on metal workpiece processing. Background Technology

[0002] Metal workpiece processing die device is a special process equipment used in cold stamping to process metal materials into parts or semi-finished products. The die device is installed on a press and applies pressure to the metal material at room temperature, causing it to separate or plastically deform, thereby obtaining parts of the required shape and size. This processing method is usually called cold stamping.

[0003] Cracking is a common quality problem in the stamping process of metal workpieces. The cause can be analyzed from the mold design: insufficient lubrication and cooling. Poor lubrication: During stamping (especially in stretching and bending processes), lubrication is required between the workpiece and the mold to reduce friction. If a special stamping lubricant (such as an extreme pressure lubricant for stretching) is not applied, the frictional resistance increases, the local temperature of the workpiece rises, and the plasticity decreases, which easily leads to "scratches + cracks".

[0004] In the existing technology, some stamping equipment has added a lubrication system to lubricate the mold. However, the lubrication system of these stamping equipment usually uses a nozzle and pump to spray lubricating oil or lubricant onto the workpiece or mold to achieve the lubrication purpose. However, these lubricating oils or lubricants are usually sprayed only onto the surface of the workpiece or the mold. Especially when the workpiece is stamped continuously, the contact surface between the workpiece and the mold is blocked, and the lubricating oil cannot lubricate the contact surface between the workpiece and the mold, resulting in an unsatisfactory lubrication effect on the contact surface between the workpiece and the mold during stamping. Summary of the Invention

[0005] The purpose of this invention is to provide a crack-resistant punching die device based on metal workpiece processing, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a crack-resistant punching die device based on metal workpiece processing, comprising at least an upper pad and a lower pad, and further comprising: The lower mold base has a sliding cavity at the top, and the top surface of the lower mold base is used to place the metal workpiece. The moving module is provided in two, and the two moving modules are slidably disposed in the sliding cavity facing each other or back to back. The moving modules have stepped surfaces on opposite sides. When the two moving modules move towards each other and abut together, the two stepped surfaces and the sliding cavity together form a cavity. The upper mold base is installed on the upper pad and is provided with a punch that mates with the cavity; A toggle mechanism is provided on the upper die base and is connected to the moving module for transmission, and is used to drive the two moving modules to slide towards each other when the upper die base is pressed downward; A lubrication mechanism is provided on the lower mold base and is connected to the moving module for transmission. It is used to spray lubricating oil onto the downward-facing side of the metal workpiece and splash it onto the cavity surface when the two moving modules slide towards each other.

[0007] Furthermore, the actuating mechanism includes at least one actuating part, which is fixed to the upper mold base; The moving module is provided with a sliding groove that cooperates with the toggle part; The bottom end of the actuating part is provided with a first inclined surface, and the top end of the moving module is provided with a second inclined surface that slides in cooperation with the first inclined surface; During the downward movement of the upper mold base, the first inclined surface contacts the second inclined surface and drives the moving module to slide towards each other. When the first inclined surface and the second inclined surface disengage, the actuating part inserts into the sliding groove.

[0008] Furthermore, the lubrication mechanism includes: The rotating part is rotatably connected to the lower pad, and has a communicating cavity inside and a second waist-shaped hole communicating with the communicating cavity on its periphery; A lubrication channel is provided inside the lower mold base for conveying lubricating oil and can intermittently communicate with the second oblong hole; An oil spraying section is located above the rotating section and has an oil spraying hole that communicates with the communicating cavity; A transmission assembly is used to connect the moving module and the rotating part, and to drive the rotating part to rotate when the moving module slides towards each other, so that the second waist-shaped hole communicates with the lubrication channel and sprays lubricating oil through the oil injection hole.

[0009] Furthermore, the transmission assembly includes: A rack is fixed to the moving module; The gear segment is fixed to the rotating part and meshes with the rack.

[0010] Furthermore, a buffer spring is provided between the oil injection section and the rotating section, and the buffer spring is used to apply a downward elastic force to the oil injection section.

[0011] Furthermore, the rotating part is coaxially fixed to a fixing part, and the upper end face of the fixing part is provided with two arc-shaped protruding sections and a recessed section in sequence; A toggle arm is fixed on the oil spraying part, and the free end of the toggle arm slides in contact with the surface of the fixed part. When the toggle arm slides to the arc-shaped protrusion, the oil injection part moves upward against the elastic force of the buffer spring; when the toggle arm slides to the concave section, the oil injection part moves downward under the elastic force of the buffer spring.

[0012] Furthermore, the position of the recessed segment corresponds to the middle position along the length direction of the second waist-shaped hole.

[0013] Furthermore, a reset spring is provided between the two moving modules, which is used to drive the two moving modules to slide back to their original positions after the stamping is completed.

[0014] Furthermore, a cooling channel is provided inside the upper mold base for introducing coolant to cool the punch.

[0015] Furthermore, a locking pin is fixed on the lower mold base, and a first oblong hole is provided on the moving module for the locking pin to pass through. The locking pin is used to longitudinally limit the moving module.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by setting up a toggle mechanism and a lubrication mechanism, there is a gap between the two moving modules before stamping. During the stamping process, the lubrication mechanism can spray lubricating oil onto the surface of the metal workpiece through this gap, and through the splashing action, the lubricating oil is splashed onto the surface of the cavity. This can lubricate both the surface of the cavity and the surface of the metal workpiece at the same time, so that the metal workpiece will not be scratched or cracked during stamping. Furthermore, the action of the toggle mechanism triggers the action of the lubrication mechanism, which reduces the waste of lubricating oil. 2. In this invention, when the two moving modules move relatively close to each other, the rack and gear segment will mesh and drive, thereby enabling the oil spraying part to move up and down according to the size of the overlapping area of ​​the second waist-shaped hole and the lubrication channel opening, so that the splashing pressure of the lubricating oil splashed onto the surface of the metal workpiece can be adjusted, and the amount of lubricating oil adhering to the surface of the metal workpiece can be increased. 3. In this invention, the cooperation of two actuating parts and a return spring enables the two moving modules to approach and press against each other during stamping to form a cavity, so that the stamping accuracy of the metal workpiece is not affected. After stamping, the two moving modules can move away from each other, so that the extrusion force of the moving modules on the surface of the metal workpiece disappears, which facilitates the demolding of the metal workpiece after stamping. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an anti-cracking punching die device based on metal workpiece processing according to the present invention. Figure 2 for Figure 1 A schematic diagram of the positional relationship of the central structure from a first-person perspective; Figure 3 for Figure 1 Schematic diagram of the positional relationship of the middle structure from a second perspective; Figure 4 for Figure 3 A schematic diagram showing the positional relationship of the middle section after it has been cut open; Figure 5 This is a schematic diagram showing the positional relationship between the lower pad, lower mold base, and moving module after assembly in this invention. Figure 6 for Figure 5 Schematic diagram of the positional relationships of the central structure after explosive decomposition; Figure 7 for Figure 5 A schematic diagram showing the positional relationship of the middle section after it has been cut open; Figure 8 for Figure 7 Enlarged schematic diagram of the local structure at point A; Figure 9 This is a schematic diagram showing the positional relationship between the rotating part, the oil injection part, and the toggle arm after assembly in this invention. Figure 10 for Figure 9 A schematic diagram showing the positional relationship of the middle section after it has been cut open; Figure 11 for Figure 9 Schematic diagram of the positional relationships of the central structure after explosive decomposition; Figure 12 This is a schematic diagram showing the positional relationship between the upper die holder and the punch after assembly in this invention; Figure 13 This is a schematic diagram showing the positional relationship of the upper mold base after it has been cut open in this invention; Figure 14 This is a schematic diagram of the moving module in this invention; Figure 15 for Figure 14 A diagram illustrating the positional relationship from another perspective.

[0018] The following are explanations of the reference numerals in the figures: 1. Upper pad; 2. Moving module; 3. Lower mold base; 4. Guide post; 5. Lower pad; 6. Lubrication channel; 7. Cooling channel; 8. Punch; 9. Actuating part; 10. Upper mold base; 11. Rotating part; 12. Sliding cavity; 13. Return spring; 14. Stepped surface; 15. Sliding groove; 16. First oblong hole; 17. Receiving groove; 18. Locking pin; 19. Rack; 20. Oil spraying part; 21. Oil spraying hole; 22. Gear section; 23. Actuating arm; 24. Arc-shaped protrusion section; 25. Second oblong hole; 26. Recessed section; 27. Buffer spring; 28. Sliding shaft; 29. ​​Limiting ring; 30. Connecting cavity; 31. Second inclined surface; 32. Mounting groove; 33. Bracket. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1-15 This invention provides a technical solution: a crack-resistant punching die device based on metal workpiece processing, including a lower pad 5 installed on an external punching machine. The top surface of the lower pad 5 is connected to a lower die base 3 by screws. The top surface of the lower die base 3 has a recessed sliding cavity 12. Two moving modules 2 are horizontally slidably installed in the sliding cavity 12. The two moving modules 2 are symmetrically arranged along the center line of the sliding cavity 12, and the opposite side walls of the two moving modules 2 slide in contact with the side walls of the sliding cavity 12. In addition, two locking pins 18 are vertically fixedly installed on each side of the two moving modules 2. The outer contour of the locking pins 18 is bolt-shaped. The moving module 2 has a first waist-shaped hole 16 for the locking pins 18 to be inserted, and the locking pins 18 can slide freely horizontally in the first waist-shaped hole 16, thereby enabling the locking pins 18 to longitudinally limit the moving module 2. Furthermore, the locking pins 18 can be directly set as bolts. Combination Figures 1 to 4 As shown, an upper pad 1 is installed on the stamping machine, located directly above the lower pad 5. The downward-facing side of the upper pad 1 is connected to an upper die base 10 via screws. A punch 8 is fixed to the downward-facing side of the upper die base 10, corresponding to the sliding cavity 12. A cooling channel 7 is provided inside the upper die base 10. The two openings of the cooling channel 7 penetrate the side wall of the upper die base 10 and are respectively connected to the inlet and outlet of an external coolant delivery system (such as a coolant delivery pump) via water pipes, thereby enabling the coolant to be delivered... The delivery system can continuously deliver coolant into the cooling channel 7, thereby making the coolant circulate in the cooling channel 7 and the coolant delivery system. During the circulation process, it can carry away the heat of the upper die holder 10 and the punch 8, so as to achieve the cooling effect of the upper die holder 10 and the punch 8. In addition, the upper pad 1 is connected to the hydraulic system of the press and is driven by the hydraulic system to move vertically. Multiple guide posts 4 are installed between the upper pad 1 and the lower pad 5. The guide posts 4 are used to guide the vertical movement of the upper pad 1. Combination Figures 2 to 6 , Figure 14 and Figure 15As shown, two actuating parts 9 are fixedly installed on the downward-facing side of the upper die base 10. The two actuating parts 9 are respectively located on both sides of the punch 8 and correspond to the two moving modules 2. The bottom end of the actuating part 9 has a first inclined surface on the side wall facing the punch 8. The moving module 2 has a sliding groove 15 for the actuating part 9 to pass freely. The top of the moving module 2 has a second inclined surface 31. When the upper die base 10 moves downward, the first inclined surface on the actuating part 9 can contact the second inclined surface 31 and move downward with the upper die base 10, so that the first inclined surface and the second inclined surface 31 are in sliding engagement, and the actuating part 9 moves relative to the moving module 2 towards the center of the sliding cavity 12. After the second inclined surface 31 is disengaged, the actuating part 9 will be inserted into the sliding groove 15. At this time, the opposite surfaces of the two moving modules 2 are pressed together. As the upper mold base 10 continues to move downward, the two moving modules 2 will not continue to move closer to each other. A stepped surface 14 is provided on the top of the moving module 2. When the opposite ends of the two moving modules 2 are pressed together, the stepped surface 14 on the two moving modules 2 and the sliding cavity 12 form a cavity. This cavity is used in conjunction with the punch 8. That is, the workpiece (metal sheet) is placed on the top surface of the lower mold base 3 and the upper mold base 10 moves downward, so that the punch 8 squeezes the workpiece and squeezes the workpiece into the cavity, thereby making the workpiece stamped and formed. Combination Figure 6 , Figure 7 and Figure 8 As shown, two mounting slots 32 are horizontally formed on the opposite end surfaces of the two moving modules 2. The mounting slots 32 are blind holes, and the two mounting slots 32 on the moving module 2 are located on opposite sides of the moving module 2. A return spring 13 is installed in both mounting slots 32 on the two moving modules 2 in a coaxial state. The two ends of the return spring 13 in the direction of elastic force are fixed to the inner walls of the corresponding two mounting slots 32. In this way, when the two moving modules 2 move closer to each other, the return spring 13 will be squeezed into a compressed state by the two moving modules 2, thereby enabling... The elastic potential energy is accumulated, so that after the actuating part 9 moves upward with the upper mold base 10 and disengages from the sliding groove 15, the elastic potential energy accumulated by the return spring 13 is released, thereby moving the driving module 2 away from the center of the sliding cavity 12. That is, the two moving modules 2 are in a relatively far apart motion state, thereby causing the inner wall of the cavity to disengage from the workpiece surface. This facilitates the quick demolding of the workpiece after stamping and avoids the workpiece being stuck in the cavity after forming, thus making it convenient for workers to demold the workpiece after forming. Combination Figures 6 to 11As shown, the lower pad 5 is vertically rotatably connected to the rotating part 11 via a mounting bearing. The rotating part 11 has a communicating cavity 30 inside. The lower pad 5 has a lubrication channel 6 inside, with one side opening penetrating the wall of the lower pad 5 and connected to an external lubricating oil delivery system (such as a lubricating oil pump) via a pipeline. The rotating part 11 has a second oblong hole 25 around its periphery. The length direction of the second oblong hole 25 is perpendicular to the axial direction of the rotating part 11, and the second oblong hole 25 communicates with the communicating cavity 30 of the rotating part 11. When the rotating part 11 rotates circumferentially around its own axial direction, the second oblong hole 25 intermittently connects with the lubrication channel 6. As the rotation progresses, the overlapping area between the second oblong hole 25 and the opening of the lubrication channel 6 first increases and then decreases. The lower mold base 3 has a through hole for the upper end of the rotating part 11 to pass freely. The upper end of the rotating part 11... A sliding shaft 28 extends through the lower mold base 3 and is coaxially mounted therethrough. The sliding shaft 28 can slide freely on the rotating part 11. One end of the sliding shaft 28 extending through the rotating part 11 is fixedly connected to an oil spraying part 20. The oil spraying part 20 is coaxially provided with an oil spraying hole 21 that passes through the sliding shaft 28. The oil spraying hole 21 is connected to the connecting cavity 30. When the external lubricating oil delivery system delivers lubricating oil into the lubrication channel 6, the rotation of the rotating part 11 causes the second waist-shaped hole 25 to begin to connect with the lubrication channel 6, thereby allowing the lubricating oil to quickly enter the second waist-shaped hole 25 from the lubrication channel 6, and then enter the connecting cavity 30 from the second waist-shaped hole 25, and then be sprayed out from the oil spraying hole 21. In addition, the rotating part 11 is located between the two moving modules 2. The downward-facing side of the moving module 2 is provided with a notch-shaped receiving groove 17. The receiving groove 17 is opened at the opposite ends of the two moving modules 2, and the rotating part 11 can freely pass through the receiving groove 17. Combination Figures 6 to 11 As shown, and please refer to the following: Figure 9 and Figure 10One end of the sliding shaft 28, which passes through the connecting cavity 30 of the rotating part 11, is threadedly fitted with a limiting ring 29. The limiting ring 29 can slide freely up and down within the connecting cavity 30. A buffer spring 27 is wound around the periphery of the sliding shaft 28. The buffer spring 27 is located within the connecting cavity 30, and its two ends in the direction of elastic force elastically abut against the limiting ring 29 and the inner top wall of the connecting cavity 30, respectively. The buffer spring 27 is in a compressed state, so that the buffer spring 27 has a downward elastic abutting force on the limiting ring 29, thereby giving the sliding shaft 28 an elastic potential energy to move downward. A toggle arm 23 is fixedly connected to the periphery of the oil injection part 20. The toggle arm 23 extends downward. A fixing part is coaxially fixed to the upper periphery of the rotating part 11. The upper end face of the fixing part is fixedly connected to two arc-shaped protrusions 24 connected end to end and a recessed section 26. The recessed section 26 is located between the two arc-shaped protrusions. Between 24, and connected end-to-end with the two arc-shaped protrusions 24, the lower end of the actuating arm 23 slides in contact with the upper end surface of the fixed part, and when the rotating part 11 rotates, the lower end of the actuating arm 23 will slide from the upper end surface of the fixed part to the surface of the arc-shaped protrusions 24 and the recessed section 26. The bottom wall of the sliding cavity 12 of the lower mold base 3 is fixedly connected to the bracket 33, and the bracket 33 is provided with a through groove for the oil spraying part 20 to pass freely. The periphery of the oil spraying part 20 is connected to the through groove as a key, that is, a key strip (not shown in the figure) is fixedly connected to the surface of the oil spraying part 20, and a key groove (not shown in the figure) is provided on the inner wall of the through groove to cooperate with the key strip. This allows the oil spraying part 20 to slide vertically and freely on the bracket 33 without rotating with the rotating part 11. The position of the recessed section 26 corresponds to the middle position of the second waist-shaped hole 25 in the length direction. Please refer to the following for more details. Figure 8 A rack 19 is horizontally fixed to the inner wall of the receiving groove 17. A gear segment 22 is provided around the periphery of the fixed part. The gear segment 22 and the rack 19 form an external meshing, and the two racks 19 are located on the radial sides of the gear segment 22 respectively. In this way, when the two moving modules 2 move closer to each other, the two racks 19 will mesh with the gear segment 22 for transmission. When meshing, the gear segment 22 will be driven to rotate.

[0021] Working principle of the invention: The metal sheet (the workpiece in this embodiment) is laid flat on the top surface of the lower die base 3, and the metal sheet is longitudinally limited by an external limiting mechanism, so that the metal sheet can only move linearly in the horizontal direction. The downward side of the metal sheet contacts and adheres to the top surface of the lower die base 3. During stamping, the external control cabinet controls the hydraulic system of the stamping machine to drive the upper pad 1 to move downward, guided by the guide post 4, so that the upper pad 1 and the lower pad 5 move closer to each other. At the same time, the external control cabinet starts the lubricating oil delivery system, which delivers lubricating oil to the lubrication channel 6. At this time, the opening of the lubrication channel 6 contacts the periphery of the rotating part 11, and the contact surface is in a sealed state. When the upper pad 1 moves downward, the actuating part 9 will move downward, and the first inclined surface and the second inclined surface 31 will slide relative to each other. The first inclined surface will generate a horizontal thrust on the second inclined surface 31 towards the inner side of the center of the sliding cavity 12, thereby causing the moving module 2 to move towards the center side of the sliding cavity 12, so that the two moving modules 2 move closer to each other. When the two moving modules 2 move closer to each other, they will compress the return spring 13, causing the return spring 13 to accumulate elastic potential energy. At the same time, when the moving modules 2 move, the rack 19 will mesh with the gear segment 22 for transmission. Since the two moving modules 2 move relative to each other, and the two racks 19 are located on opposite radial sides of the oil spray section 20, the gear segment 22 will rotate when the two moving modules 2 move relative to each other. When the gear segment 22 rotates, the second waist-shaped hole 25 on the rotating part 11 will gradually approach the lubrication channel 6, so that the second waist-shaped hole 25 begins to connect with the opening of the lubrication channel 6. The lubricating oil in the lubrication channel 6 enters the connecting cavity 30 through the second waist-shaped hole 25, and then enters the oil spray hole 21 through the connecting cavity 30. Since the lubricating oil delivery system has a certain delivery pressure, the lubricating oil can be sprayed out from the oil spray hole 21. The lubricating oil will be sprayed from the gap between the opposite surfaces of the two moving modules 2 toward the downward-facing side of the metal plate. When the lubricating oil is sprayed onto the surface of the metal sheet, it splashes onto the stepped surface 14 of the moving module 2. This ensures that both the downward-facing side of the metal sheet and the surface of the stepped surface 14 are sprayed with lubricating oil, resulting in a lubricating effect when the metal sheet contacts the stepped surface 14. Furthermore, as the rotating part 11 rotates, the overlapping area between the opening of the lubrication channel 6 and the second oblong hole 25 first increases and then decreases. Correspondingly, the actuating arm 23 slides from the upper end face of the fixed part to the top surface of the first arc-shaped protrusion 24, then from the surface of the first arc-shaped protrusion 24 to the surface of the recessed section 26, and then from the surface of the recessed section 26 to the surface of the second arc-shaped protrusion 24. As the actuating arm 23 slides from the upper end face of the fixed part to the top surface of the first arc-shaped protrusion 24, the overlapping area between the opening of the lubrication channel 6 and the second waist-shaped hole 25 gradually increases. During this process, because the overlapping area between the opening of the lubrication channel 6 and the second waist-shaped hole 25 is small, the pressure of the lubricating oil sprayed from the opening of the oil spray hole 21 is small, resulting in a smaller lubricating oil splash range. Therefore, when the actuating arm 23 slides from the upper end face of the fixed part to the top surface of the first arc-shaped protrusion 24, the oil spray part 20 gradually moves upward, so that the longitudinal distance between the upper end face of the oil spray part 20 and the surface of the metal plate decreases, thereby increasing the splash range of the lubricating oil on the surface of the metal plate. When the opening of the lubrication channel 6 is completely aligned with the second oblong hole 25, the flow rate of the lubricating oil entering the connecting cavity 30 is at its maximum. Therefore, the lubricating oil sprayed from the oil spray hole 21 may splash over a large area on the surface of the metal plate, and the splashing pressure is also high. This will result in less lubricating oil adhering to the surface of the metal plate. Therefore, when the toggle arm 23 slides from the top surface of the first arc-shaped protrusion 24 to the surface of the recessed section 26, the buffer spring 27 will generate a downward elastic resisting force on the limiting ring 29, thereby causing the oil spraying part 20 to move downward. This increases the longitudinal distance between the upper end surface of the oil spraying part 20 and the surface of the metal plate, thereby reducing the splashing pressure of the lubricating oil on the surface of the metal plate. This allows the lubricating oil adhering to the surface of the metal plate to flow, so that it is not washed away and dripped down by the high-speed splashing lubricating oil, thus increasing the amount of lubricating oil adhering to the surface of the metal plate. As the rotating part 11 rotates, the overlapping area between the second oblong hole 25 and the opening of the lubrication channel 6 gradually decreases. This reduces the pressure of the lubricating oil delivered to the spray hole 21. To ensure the splashing pressure and splashing range of the lubricating oil on the metal plate surface, the actuating arm 23 slides from the recessed section 26 to the surface of the second arc-shaped protrusion section 24, causing the spraying part 20 to move upwards. This increases the splashing pressure and splashing range of the lubricating oil on the metal plate surface, and improves the adhesion of the lubricating oil on the metal plate surface. When the two moving modules 2 move closer to each other until their end faces abut, the actuating arm 23 slides from the surface of the second arc-shaped protrusion section 24 to the upper end face of the fixed part. Furthermore, the external control cabinet controls the lubricating oil delivery system to stop delivering lubricating oil. At this time, both the metal sheet and the stepped surface 14 are covered with lubricating oil. When the first inclined surface on the actuating part 9 disengages from the contact with the second inclined surface 31, the actuating part 9 will be inserted into the sliding groove 15, so that the moving module 2 is limited by the actuating part 9. At this time, the stepped surface 14 of the moving module 2 and the sliding cavity 12 will form a cavity. The punch 8 squeezes the metal sheet and causes the metal sheet to be inserted into the cavity, thereby forming a workpiece with a specific shape or contour, thus completing the stamping of the metal sheet. The external coolant delivery system delivers coolant to the cooling channel 7, so that the punch 8 can be continuously cooled.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crack-resistant punching die device based on metal workpiece processing, comprising at least an upper pad (1) and a lower pad (5), characterized in that, Also includes: The lower mold base (3) has a sliding cavity (12) on its top, and the top surface of the lower mold base (3) is used to place metal workpieces; Two moving modules (2) are provided, and the two moving modules (2) are slidably disposed in the sliding cavity (12) facing each other or back to back. The moving modules (2) have stepped surfaces (14) on opposite sides. When the two moving modules (2) move towards each other to abut each other, the two stepped surfaces (14) and the sliding cavity (12) together form a cavity. The upper mold base (10) is installed on the upper pad (1) and is provided with a punch (8) that mates with the cavity. A toggle mechanism is provided on the upper die base (10) and is connected to the moving module (2) for driving the two moving modules (2) to slide towards each other when the upper die base (10) is pressing downwards; The lubrication mechanism is located on the lower mold base (3) and is connected to the moving module (2) for spraying lubricating oil onto the downward-facing side of the metal workpiece and splashing it onto the cavity surface when the two moving modules (2) slide towards each other.

2. The anti-cracking punching die device based on metal workpiece processing according to claim 1, characterized in that, The actuating mechanism includes at least one actuating part (9), which is fixed on the upper mold base (10). The moving module (2) is provided with a sliding groove (15) that cooperates with the actuating part (9). The bottom end of the actuating part (9) is provided with a first inclined surface, and the top end of the moving module (2) is provided with a second inclined surface (31) that slides with the first inclined surface. During the downward movement of the upper mold base (10), the first inclined surface contacts the second inclined surface (31) and drives the moving module (2) to slide towards each other. When the first inclined surface and the second inclined surface (31) disengage, the actuating part (9) is inserted into the sliding groove (15).

3. The anti-cracking punching die device based on metal workpiece processing according to claim 1, characterized in that, The lubrication mechanism includes: The rotating part (11) is rotatably connected to the lower pad (5), and has a communicating cavity (30) inside and a second waist-shaped hole (25) communicating with the communicating cavity (30) on its periphery. The lubrication channel (6) is located inside the lower mold base (3) and is used to deliver lubricating oil. It can also be intermittently connected to the second waist-shaped hole (25). The oil spraying part (20) is located above the rotating part (11) and has an oil spraying hole (21) that communicates with the communicating cavity (30). The transmission assembly is used to connect the moving module (2) and the rotating part (11), and is used to drive the rotating part (11) to rotate when the moving module (2) slides towards each other, so that the second waist-shaped hole (25) communicates with the lubrication channel (6) and sprays lubricating oil through the oil injection hole (21).

4. The anti-cracking punching die device based on metal workpiece processing according to claim 3, characterized in that, The transmission assembly includes: A rack (19) is fixed to the moving module (2); The gear segment (22) is fixed on the rotating part (11) and meshes with the rack (19).

5. A crack-resistant punching die device based on metal workpiece processing according to claim 3, characterized in that... A buffer spring (27) is provided between the oil spraying part (20) and the rotating part (11), and the buffer spring (27) is used to apply a downward elastic force to the oil spraying part (20).

6. The anti-cracking punching die device based on metal workpiece processing according to claim 5, characterized in that, The rotating part (11) is coaxially fixed to a fixed part. The upper end face of the fixed part is provided with two arc-shaped protruding sections (24) and a recessed section (26). The oil spraying part (20) is fixed with a toggle arm (23). The free end of the toggle arm (23) slides in contact with the surface of the fixed part. When the actuating arm (23) slides to the arc-shaped protrusion (24), the oil injection part (20) moves upward against the elastic force of the buffer spring (27); when the actuating arm (23) slides to the recessed section (26), the oil injection part (20) moves downward under the elastic force of the buffer spring (27).

7. A crack-resistant punching die device based on metal workpiece processing according to claim 6, characterized in that, The position of the recessed section (26) corresponds to the middle position of the second waist-shaped hole (25) along its length.

8. The anti-cracking punching die device based on metal workpiece processing according to claim 1, characterized in that, A reset spring (13) is provided between the two moving modules (2). The reset spring (13) is used to drive the two moving modules (2) to slide back to reset after stamping is completed.

9. A crack-resistant punching die device based on metal workpiece processing according to claim 1, characterized in that, The upper mold base (10) has a cooling channel (7) for introducing coolant to cool the punch (8).

10. A crack-resistant punching die device based on metal workpiece processing according to claim 1, characterized in that, The lower mold base (3) is fixed with a locking pin (18), and the moving module (2) is provided with a first waist-shaped hole (16) through which the locking pin (18) passes. The locking pin (18) is used to longitudinally limit the moving module (2).

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