A rapid prototyping device for stamping dies

Abstract

The present invention provides a rapid prototyping device for stamping dies in the field of stamping dies, which includes a moving die module and a fixed die module, and is used for simultaneously stamping and forming an N-shaped workpiece and a shell workpiece, and assembling a pin column between the N-shaped workpiece and the shell workpiece. The moving die module includes a moving die base, and a concave die core and a concave die column are arranged on the moving die base; the fixed die module includes a fixed die base, and a convex die core and a slider mechanism are arranged on the fixed die base; punching and assembling mechanisms are symmetrically arranged on both sides of the fixed die base; a transmission mechanism for stepwise driving the concave die column and the concave die core to move downward is arranged at the top of the moving die module. The present invention has a relatively high degree of automation, can simultaneously complete the forming of the N-shaped workpiece and the shell workpiece and the assembly of the pin column in one stamping process, integrates the traditional multiple stamping and assembly processes into a continuous operation process, improves the production efficiency of automotive hinges, and is suitable for popularization and application.

Description

Technical Field

[0001] The present application relates to the field of stamping dies, and in particular to a stamping die rapid prototyping device. Background Art

[0002] As the key connecting parts between the car body and the doors, hood, trunk lid and other parts, the quality and performance of automobile hinges directly affect the safety, comfort and overall quality of the car. In the automobile manufacturing industry, the production efficiency and quality requirements of automobile hinges are increasing day by day.

[0003] In the traditional stamping production process of automobile hinges, there are many problems that need to be solved. First, the production efficiency is low. Traditional stamping dies often need to go through multiple independent stamping processes to form different parts of the automobile hinges respectively, and then perform assembly operations. Each stamping process requires precise positioning and adjustment, which not only consumes a lot of time, but also easily produces cumulative errors during multiple positioning and adjustment processes, affecting the final accuracy of the product. At the same time, the operation of multiple processes increases the complexity of the production process, reduces the overall production efficiency, and cannot meet the needs of large-scale and high-efficiency production in the modern automobile manufacturing industry.

[0004] In traditional automobile hinge production, the assembly of parts such as pins is usually an independent operation after stamping. This separate assembly method is easily affected by human and environmental factors, resulting in inaccurate and unstable assembly. For example, when inserting the pin into the punched workpiece hole, the pin may not be inserted properly or tilted. At the same time, the pin holes on the two sets of accessories of the automobile hinge are distributed punched, and there is a concentricity deviation problem during assembly, which affects the connection strength and flexibility of the automobile hinge. In addition, the traditional assembly method requires additional labor and equipment, which increases production costs and production cycles.

[0005] In summary, the traditional automobile hinge stamping die has obvious deficiencies in production efficiency, molding accuracy and assembly quality, and cannot meet the needs of modern automobile manufacturing industry for high-quality and high-efficiency production. Therefore, the development of a new type of stamping die rapid prototyping device, which can simultaneously complete the molding and assembly of multiple parts of automobile hinges in one stamping process, improve production efficiency, ensure molding accuracy and assembly quality, has important practical significance and industrial application value. Summary of the invention

[0006] The purpose of this application is to solve the technical problems of low production efficiency, poor forming accuracy, and low assembly quality in existing automotive hinge stamping dies. Compared with the prior art, a rapid prototyping device for stamping dies is provided, including a moving die module and a fixed die module, which are used to simultaneously stamp and form an N-shaped workpiece and a shell workpiece, and assemble a pin column between the N-shaped workpiece and the shell workpiece. The moving die module includes a moving die base, and a concave die core is fixed at the bottom of the moving die base. A concave die column is slidably connected in the concave die core along the vertical direction, and a vertical chute that matches the concave die column and penetrates is provided on the concave die core;

[0007] The fixed die module includes a fixed die base, and a convex die core is fixed at the top of the fixed die base. A traveling mechanism is slidably connected to one side of the fixed die base along the horizontal direction. A side cavity that matches the traveling mechanism is provided on one side of the convex die core. The traveling mechanism and the side cavity are aligned to form a stamping cavity that matches the N-shaped workpiece. The convex die core and the concave die core are aligned to form a stamping cavity that matches the shell workpiece. A first arc portion for bending the edge of the flat shell workpiece is provided in the concave die core;

[0008] Punching and assembling mechanisms for forming a first punching hole on the N-shaped workpiece and a second punching hole on the shell workpiece are symmetrically provided on both sides of the fixed die base;

[0009] A storage guide groove for storing pin columns is provided at the top of one of the punching and assembling mechanisms;

[0010] A transmission mechanism for stepwise driving the concave die column and the concave die core to move downward is provided at the top of the moving die module.

[0011] Further, both the N-shaped workpiece and the shell workpiece are in a plate-like structure before stamping. A first assembly hole is provided on the N-shaped workpiece, and a second assembly hole is provided on the shell workpiece;

[0012] A positioning block corresponding to the second assembly hole is provided at the top of the convex die core, and a positioning groove corresponding to the positioning block is provided at the bottom of the concave die column.

[0013] Further, the traveling mechanism includes a main traveling block. A side chute is provided on one side of the convex die core. The main traveling block is slidably connected to one side of the convex die core through a slide rail that matches the side chute. A flipping traveling block is rotatably connected to the top of the main traveling block. A torsion spring is sleeved on the rotating shaft of the flipping traveling block, and the torsion spring has an elastic force that drives the flipping traveling block to flip close to the inclined sliding sleeve;

[0014] Two right-angle bending portions are provided on both sides of the N-shaped workpiece. A second arc portion and a third arc portion corresponding to the right-angle bending portion are provided after the main traveling block and the flipping traveling block are aligned.

[0015] Further, a diagonal sliding sleeve is fixed on the side of the main slide block away from the flipping slide block, and a diagonal guide post matching the diagonal sliding sleeve is fixed on one side of the moving die base.

[0016] Further, a plurality of upper sliding sleeves are provided on the moving die base, a sliding post matching the upper sliding sleeve is fixed on the fixed die base, a return spring is sleeved on the sliding post, and the return spring has an elastic force to drive the moving die base away from the fixed die base.

[0017] Further, the transmission mechanism includes a transmission sleeve, the top of the transmission sleeve is fixedly connected to the output end of the main hydraulic mechanism, a transmission rod is slidably connected in the transmission sleeve along the vertical direction, a tension spring is clamped between the transmission rod and the transmission sleeve, and the tension spring has an elastic force to drive the transmission rod to move downward and abut against the top of the concave die column.

[0018] Further, punching slots are provided on the sides of the flipping slide block and the main slide block opposite to each other, and two groups of side holes are symmetrically provided on both sides of the concave die core;

[0019] The punching assembly mechanism includes a guide sleeve fixed on the top of the fixed die base, a punching rod is slidably connected in the guide sleeve, one ends of the two punching rods away from each other are fixedly connected to the output ends of the auxiliary hydraulic mechanisms, a plurality of pin posts are equidistantly and evenly arranged in the storage guide groove, and a feed groove communicating with the bottom of the storage guide groove is provided on the top of the guide sleeve;

[0020] A proximity sensor for controlling the opening and closing of the punching assembly mechanism is further fixed on one side of the top of the fixed die base.

[0021] Further, when the concave die core moves downward to align with the convex die core, the side holes are coaxially arranged with the punching rods; when the slide mechanism moves horizontally to align with the side cavity of the convex die core, the punching slots are coaxially arranged with the punching rods.

[0022] Further, discharge opening grooves are provided on the sides opposite to the side holes, and the depth of the discharge opening grooves is greater than twice the thickness of the plate of the N-shaped workpiece or the shell workpiece.

[0023] Further, the diameters of the pin posts, the punching rods and the side holes are all equal to the diameter of the punching slots, and the diameter of the discharge opening grooves is greater than the diameter of the punching slots;

[0024] The two ends of the pin posts are formed into punching rivet heads after being punched by the punching rods, and the diameter of the punching rivet heads is smaller than the diameter of the discharge opening grooves.

[0025] Compared with the prior art, the advantages of the present application are as follows:

[0026] The present invention has a high degree of automation, reduces the manual operation links, decreases the labor intensity and work risks of workers, and can simultaneously complete the forming of N-shaped workpieces and shell workpieces and the assembly of pin columns in one stamping process, integrating the traditional multi-step stamping and assembly processes into a continuous operation process. It improves the production efficiency of automotive hinges and meets the requirements of large-scale production in the automotive manufacturing industry.

[0027] The integrated punching and assembly mechanism realizes the precise assembly of pin columns, synchronously completes punching and pin column assembly during the stamping process, avoids the inaccurate assembly problems caused by human factors and environmental factors in the traditional assembly method, improves the overall assembly quality and reliability of automotive hinges, and is suitable for popularization and application. Description of the Drawings

[0028] Figure 1 is a front structural schematic diagram of the present application;

[0029] Figure 2 is a bottom structural schematic diagram of the present application;

[0030] Figure 3 is a stamping process schematic diagram of the present application;

[0031] Figure 4 is an exploded structural schematic diagram of the present application;

[0032] Figure 5 is a bottom exploded structural schematic diagram of the moving module proposed in the present application;

[0033] Figure 6 is a top exploded structural schematic diagram of the moving module proposed in the present application;

[0034] Figure 7 is an exploded structural schematic diagram of the fixed module proposed in the present application;

[0035] Figure 8 is an exploded structural schematic diagram of the punching and assembly mechanism and the material storage guide groove proposed in the present application;

[0036] Figure 9 is a structural schematic diagram of the slider mechanism proposed in the present application;

[0037] Figure 10 is a state comparison schematic diagram when the concave die column moves downward in the present application;

[0038] Figure 11 is a state comparison schematic diagram when the concave die core moves downward in the present application;

[0039] Figure 12 is a partial sectional structural schematic diagram of the present application;

[0040] Figure 13For Figure 12 The enlarged structural schematic diagram of part A in

[0041] Description of the reference numerals in the figure:

[0042] 1. Moving die module; 11. Moving die base; 111. Upper sliding sleeve; 12. Angle pin; 13. Female die core; 131. First arc part; 132. Vertical sliding groove; 133. Side hole; 1331. Stripping opening groove; 14. Female die post; 141. Alignment groove; 2. Fixed die module; 201. Proximity sensor; 21. Fixed die base; 211. Slide pin; 212. Return spring; 22. Male die core; 221. Alignment block; 222. Side cavity; 223. Side sliding groove; 3. Transmission mechanism; 31. Transmission sleeve; 32. Transmission rod; 33. Tension spring; 4. Material storage guide groove; 5. Lifter mechanism; 501. Punching groove; 502. Second arc part; 503. Third arc part; 51. Main lifter block; 52. Inclined sliding sleeve; 53. Flip lifter block; 6. Punching and assembling mechanism; 61. Guide sleeve; 611. Feeding groove; 62. Stamping rod; 7. N-shaped workpiece; 71. First assembly hole; 72. First punching; 8. Shell workpiece; 81. Second assembly hole; 82. Second punching; 9. Pin post; 91. Stamping riveting head. Detailed implementation manners

[0043] In the embodiments, the technical solutions of the present application will be clearly and completely described in conjunction with the accompanying drawings of the specification. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0044] Embodiment:

[0045] The present invention provides a rapid prototyping device for a stamping die. Please refer to Figure 1 - Figure 13 , which mainly consists of a moving die module 1 and a fixed die module 2. The two cooperate with each other to jointly complete the stamping and forming and assembly processes of an automotive hinge.

[0046] Please refer to Figure 4 - Figure 6 , the moving die module 1 includes a moving die base 11. The moving die base 11 serves as the basic support component of the moving die module. A female die core 13 is fixed at its bottom. The female die core 13 is one of the key components for realizing the stamping and forming of the shell workpiece 8. A female die post 14 is slidably connected in the female die core 13 in the vertical direction. A vertical sliding groove 132 that matches and penetrates the female die post 14 is provided on the female die core 13 to provide guidance and support for the up and down sliding of the female die post 14.

[0047] Please refer to Figure 7, the fixed mold set 2 includes a fixed mold base 21. The fixed mold base 21 is the supporting structure of the fixed mold set, and a punch core 22 is fixed on its top. The punch core 22 cooperates with the die core 13 to jointly perform stamping on the shell workpiece 8 to form a shape. On one side of the fixed mold base 21, a slider mechanism 5 is slidably connected in the horizontal direction. On one side of the punch core 22, there is a side cavity 222 that matches the slider mechanism 5. The slider mechanism 5 and the side cavity 222 are aligned to form a stamping cavity that matches the N-shaped workpiece 7, realizing the stamping of the N-shaped workpiece 7. The punch core 22 and the die core 13 are aligned to form a stamping cavity that matches the shell workpiece 8. In the die core 13, there is a first arc portion 131 that drives the edge of the flat shell workpiece 8 to bend. During the stamping process, the edge of the shell workpiece 8 is bent through the first arc portion 131 to meet the shape requirements of the automotive hinge.

[0048] Specifically, on both sides of the fixed mold base 21, there are also symmetrically arranged punching and assembling mechanisms 6 for forming the first punching holes 72 on the N-shaped workpiece 7 and the second punching holes 82 on the shell workpiece 8. On the top of one side punching and assembling mechanism 6, there is a storage and guiding groove 4 for storing the pin posts 9, providing storage and guiding functions for the automatic feeding and assembling of the pin posts 9.

[0049] On the top of the moving mold set 1, there is a transmission mechanism 3 for driving the die post 14 and the die core 13 to move downward step by step. Through the precise control of the transmission mechanism 3, the downward movements of the die post 14 and the die core 13 at different stages are realized, ensuring the smooth progress of the stamping process.

[0050] Before stamping, both the N-shaped workpiece 7 and the shell workpiece 8 are in a plate-like structure, which is to facilitate positioning and stamping in the mold. The N-shaped workpiece 7 is provided with a first assembly hole 71, and the shell workpiece 8 is provided with a second assembly hole 81. These two assembly holes are pre-punched holes for realizing the assembly of the N-shaped workpiece 7, the shell workpiece 8 and the vehicle body.

[0051] On the top of the punch core 22, there is a positioning block 221 corresponding to the second assembly hole 81, and at the bottom of the die post 14, there is a positioning groove 141 corresponding to the positioning block 221. Before stamping, when the N-shaped workpiece 7 and the shell workpiece 8 are placed in the mold, the second assembly hole 81 of the shell workpiece 8 is placed on the positioning block 221 of the punch core 22 to achieve preliminary positioning. Through the downward movement of the die post 14, the positioning block 221 and the positioning groove 141 are aligned, and the die post 14 and the punch core 22 are aligned and clamp the flat shell workpiece 8 again, which can ensure the accurate alignment of the N-shaped workpiece 7 and the shell workpiece 8 during the stamping process and guarantee the precision of the stamping.

[0052] Please refer to Figure 9, the slider mechanism 5 is a key component for stamping the complex shape of the N-shaped workpiece 7. The slider mechanism 5 includes a main slider block 51. On one side of the punch core 22, there is a side chute 223. The main slider block 51 is slidably connected to one side of the punch core 22 through a slide rail that matches the side chute 223. This sliding connection method can ensure the stable movement of the main slider block 51 in the horizontal direction. A flipping slider block 53 is rotatably connected to the top of the main slider block 51. A torsion spring is sleeved on the rotating shaft of the flipping slider block 53. The torsion spring has an elastic force that drives the flipping slider block 53 to flip close to the inclined sliding sleeve 52.

[0053] There are two right-angle bending parts on both sides of the N-shaped workpiece 7. After the main slider block 51 and the flipping slider block 53 are aligned, there are a second arc part 502 and a third arc part 503 corresponding to the right-angle bending parts. During the stamping process, when the slider mechanism 5 moves horizontally and aligns with the side cavity 222 of the punch core 22, the second arc part 502 and the third arc part 503 can accurately form the right-angle bending parts of the N-shaped workpiece 7, ensuring the shape accuracy of the N-shaped workpiece 7. On the side of the main slider block 51 away from the flipping slider block 53, there is also a fixed inclined sliding sleeve 52. On one side of the moving die base 11, there is a fixed inclined guide post 12 that matches the inclined sliding sleeve 52. During the stamping process, when the moving die base 11 moves downward, the inclined guide post 12 will insert into the inclined sliding sleeve 52. Through the cooperation of the inclined guide post 12 and the inclined sliding sleeve 52, the main slider block 51 is driven to move horizontally, thereby realizing the horizontal displacement of the slider mechanism 5 and completing the stamping of the N-shaped workpiece 7.

[0054] Please refer to Figure 2 , there are several upper sliding sleeves 111 on the moving die base 11. On the fixed die base 21, there is a fixed sliding post 211 that matches the upper sliding sleeves 111. A return spring 212 is also sleeved on the sliding post 211. The return spring 212 has an elastic force that drives the moving die base 11 away from the fixed die base 21. During the stamping process, the moving die base 11 moves downward along the sliding post 211 and approaches the fixed die base 21 to complete the stamping action. After the stamping is completed, under the action of the return spring 212, the moving die base 11 will move upward along the sliding post 211 and move away from the fixed die base 21 to realize the reset of the mold. This design of the guiding and resetting structure can ensure the stability and accuracy of the moving die base 11 during the up and down movement, and also prepares for the next stamping.

[0055] Please refer to Figure 10 - Figure 11, Further, the transmission mechanism 3 includes a transmission sleeve 31. The top of the transmission sleeve 31 is fixedly connected to the output end of the main hydraulic mechanism, and the main hydraulic mechanism provides power for the transmission sleeve 31 to enable it to move in the vertical direction. A transmission rod 32 is slidably connected to the transmission sleeve 31 in the vertical direction. A tension spring 33 is clamped between the transmission rod 32 and the transmission sleeve 31, and the tension spring 33 has an elastic force to drive the transmission rod 32 to move downward and abut against the top of the female die column 14. At the beginning of stamping, the main hydraulic mechanism drives the transmission sleeve 31 to move downward. Under the action of the tension spring 33, the transmission rod 32 first abuts against the top of the female die column 14, driving the female die column 14 to move downward. When the female die column 14 moves downward and abuts against the top of the male die core 22, the transmission sleeve 31 continues to move downward, and the female die core 13 is pushed downward through the transmission rod 32, realizing the function of stepwise driving the female die column 14 and the female die core 13 to move downward. This stepwise driving design can accurately control the downward movement sequence and displacement of the female die column 14 and the female die core 13 according to the needs of the stamping process, ensuring the smooth progress of the stamping process.

[0056] Furthermore, please refer to Figure 12 - Figure 13 , Punching grooves 501 are provided on both sides of the flipping slider 53 opposite to the main slider 51. Two groups of side holes 133 are symmetrically provided on both sides of the female die core 13. The punching assembly mechanism 6 includes a guide sleeve 61 fixed to the top of the fixed die base 21. A punching rod 62 is slidably connected in the guide sleeve 61. The output ends of the two punching rods 62 away from each other are fixedly connected to the output end of the auxiliary hydraulic mechanism, and the auxiliary hydraulic mechanism provides power for the punching rod 62 to enable it to move left and right in the guide sleeve 61. A plurality of pin posts 9 are equally spaced and evenly distributed in the storage guide groove 4. The top of the guide sleeve 61 is provided with a feed groove 611 communicating with the bottom of the storage guide groove 4. During the stamping process, when the female die core 13 moves downward and aligns with the male die core 22, the side holes 133 are coaxially arranged with the punching rods 62; when the slider mechanism 5 moves horizontally and aligns with the side cavity 222 of the male die core 22, the punching grooves 501 are coaxially arranged with the punching rods 62. At this time, the auxiliary hydraulic mechanism drives the punching rod 62 to move downward, and the punching rod 62 sequentially passes through the side holes 133 and the punching grooves 501 to form a second punching 82 on the housing workpiece 8 and a first punching 72 on the N-shaped workpiece 7.

[0057] After the punching operation is completed, the two sets of punching rods 62 retract and reset. During the reset process of the punching rod 62 on one side of the material storage guide groove 4, when the end retracts to the side of the material storage guide groove 4 away from the mold, the pin columns 9 accumulated in the material storage guide groove 4 lose support and fall into the guide sleeve 61 through the feeding groove 611. At this time, the two sets of punching rods 62 perform a relative approaching displacement action again. The pin column 9 in the guide sleeve 61 passes through the first punching hole 72 of the N-shaped workpiece 7 and the second punching hole 82 of the housing workpiece 8 in sequence under the thrust of the punching rod 62, and then the two sets of punching rods 62 punch both ends of the pin column 9 to form a punching rivet head 91, completing the assembly of the pin column 9 between the N-shaped workpiece 7 and the housing workpiece 8. A proximity sensor 201 for controlling the opening and closing of the punching and assembling mechanism 6 is also fixed on one side of the top of the fixed mold base 21. The proximity sensor 201 can monitor the position and state of the mold in real time. When the mold moves to the appropriate position, it controls the auxiliary hydraulic mechanism to start, driving the punching rod 62 to perform punching and pin column assembly operations, ensuring the accuracy and timeliness of the punching and assembly processes.

[0058] It should be noted that discharge opening grooves 1331 are provided on both sides opposite to the side holes 133, and the groove depth of the discharge opening grooves 1331 is greater than twice the plate thickness of the N-shaped workpiece 7 or the housing workpiece 8. The diameters of the pin column 9, the punching rod 62, and the side holes 133 are all equal to the diameter of the punching groove 501, and the diameter of the discharge opening groove 1331 is greater than the diameter of the punching groove 501; after both ends of the pin column 9 are punched by the punching rod 62, a punching rivet head 91 is formed, and the diameter of the punching rivet head 91 is smaller than the diameter of the discharge opening groove 1331. After the punching of the N-shaped workpiece 7 and the housing workpiece 8 is completed, the punched waste will stay in the punching groove 501. When the punching rod 62 pushes the pin column 9 into the punching groove 501, the waste in the punching groove 501 will be discharged by the extrusion of the pin column 9 and smoothly move down through the discharge opening groove 1331 to discharge from the mold, avoiding the accumulation of waste in the punching groove 501 and affecting the normal operation of the mold and the quality of the next punching. At the same time, this discharge structure design also facilitates the cleaning and maintenance of the mold.

[0059] Working principle:

[0060] Mold preparation stage: Before performing the stamping operation, the mold needs to be prepared first. The plate-shaped N-shaped workpiece 7 and the housing workpiece 8 are respectively placed in the corresponding mold positions. Specifically, when operating, the N-shaped workpiece 7 is placed between the side cavity 222 of the punch core 22 and the slider mechanism 5; the housing workpiece 8 is placed between the die core 13 and the punch core 22, so that the second assembly hole 81 of the housing workpiece 8 is aligned with the alignment block 221 on the punch core 22. At the same time, an appropriate amount of pin columns 9 are neatly placed in the material storage guide groove 4 to ensure that the pin columns 9 can smoothly enter the punching position through the feeding groove 611 in the subsequent operations.

[0061] Stamping forming stage: After the preparation work is completed, the stamping machine is started, and the main hydraulic mechanism begins to work. The main hydraulic mechanism drives the transmission sleeve 31 to move downward. Under the action of the tension spring 33, the transmission rod 32 first abuts against the top of the female die column 14, driving the female die column 14 to move downward along the vertical sliding groove 132 in the female die core 13. During the downward movement of the female die column 14, it gradually approaches and aligns with the male die core 22, clamping the shell workpiece 8 to prevent stamping deviation during the subsequent stamping process. When the female die column 14 moves to the in-place position, the transmission sleeve 31 continues to move downward and abuts against the moving die base 11. During the downward movement of the moving die base 11, the edge of the female die core 13 presses the edge of the flat shell workpiece 8 to gradually deform downward. When the female die core 13 moves to the in-place position, the first arc portion 131 contacts and applies pressure to the bending portion to be bent of the shell workpiece 8, causing it to gradually bend to form a bending structure that meets the shape requirements of the automotive hinge.

[0062] Meanwhile, the inclined guide post 12 on one side of the moving die base 11 gradually inserts into the inclined sliding sleeve 52 on one side of the main slide block 51. As the moving die base 11 continues to move downward, the inclined guide post 12 drives the main slide block 51 to move horizontally along the side sliding groove 223 on one side of the male die core 22 through the inclined sliding sleeve 52. During the movement of the main slide block 51, the flipping slide block 53 on the top is driven to move together. When the main slide block 51 and the flipping slide block 53 move to the alignment position with the side cavity 222 of the male die core 22, the second arc portion 502 and the third arc portion 503 formed after the alignment of the main slide block 51 and the flipping slide block 53 closely fit the right-angle bending portion of the N-shaped workpiece 7, stamping and forming the N-shaped workpiece 7 to make it form an accurate shape.

[0063] Punching and assembly stage: While the N-shaped workpiece 7 and the shell workpiece 8 are being stamped and formed, the punching and assembly mechanism 6 starts to work. When the female die core 13 moves to the in-place position, the side hole 133 is coaxially arranged with the punching rod 62; when the slide mechanism 5 moves horizontally and aligns with the side cavity 222 of the male die core 22, the punching groove 501 is also coaxially arranged with the punching rod 62. At this time, the proximity sensor 201 detects that the mold has reached the appropriate position, controls the sub-hydraulic mechanism to start, and drives the two groups of punching rods 62 to move relative to each other.

[0064] The stamping rod 62 first passes through the side holes 133 on both sides of the die core 13 to punch a second punching hole 82 in the housing workpiece 8. Then, the stamping rod 62 continues to move, passes through the punching slots 501 on the flipping slider 53 and the main slider 51, punches a first punching hole 72 in the N-shaped workpiece 7, and pushes the punching waste into the punching slot 501 for storage. During the second relatively close displacement of the stamping rod 62, on the one hand, the pin 9 in the storage guide groove 4 is pushed out through the feeding slot 611, and on the other hand, the waste in the punching slot 501 is pushed to the discharge opening slot 1331 by the thrust of the pin 9. The pin 9 passes through the first punching hole 72 of the N-shaped workpiece 7 and the second punching hole 82 of the housing workpiece 8 in sequence. Then, the stamping rod 62 punches both ends of the pin 9 to form stamping rivet heads 91 at both ends of the pin 9, thereby firmly assembling the N-shaped workpiece 7 and the housing workpiece 8 together, completing the key assembly step of the automotive hinge.

[0065] Mold reset stage: After stamping and assembly are completed, the main hydraulic mechanism drives the transmission sleeve 31 to move upward, and the transmission rod 32 rises accordingly. Under the action of the reset spring 212, the die post 14 and the die core 13 are reset upward and return to the initial position along the slide post 211. During this process, due to the design of the discharge opening slot 1331, the stamping rivet head 91 of the pin 9 fixed in the punching slot 501 will not block the upward movement of the die core 13, avoiding the phenomenon of reset interference. At the same time, the moving die base 11 also moves upward under the action of the reset spring 212, the inclined guide post 12 withdraws from the inclined slide sleeve 52, and the main slider 51 and the flipping slider 53 are horizontally reset under the action of the inclined guide post 12 and the inclined slide sleeve 52, and the punching slot 501 is used to buckle the pin 9 to take out the N-shaped workpiece 7 and the housing workpiece 8 assembled with the pin 9 from the mold and return to the initial position. At this time, the stamped automotive hinge can be rotated by using the flipping slider 53 to open the punching slot 501 and take out the pin 9 from the punching slot 501 to complete a complete production cycle.

[0066] The present invention has a high degree of automation, reduces the manual operation links, reduces the labor intensity and work risks of workers, and can simultaneously complete the forming of the N-shaped workpiece 7 and the housing workpiece 8 and the assembly of the pin 9 in one stamping process, integrating the traditional multi-step stamping and assembly processes into a continuous operation process. Compared with the traditional mold, it reduces the production time and the number of process conversions, avoids the time waste caused by multiple positioning and adjustments, significantly improves the production efficiency of the automotive hinge, and meets the requirements of large-scale production in the automotive manufacturing industry.

[0067] Among them, the cooperation between the alignment block 221 on the punch core 22 and the alignment groove 141 on the die column 14 ensures the accurate alignment of the N-shaped workpiece 7 and the housing workpiece 8 during the stamping process, avoiding forming errors caused by position deviation. The precise forming design of the angled bending part of the N-shaped workpiece 7 by the slider mechanism 5 and the precise control of the edge bending of the housing workpiece 8 by the first arc part 131 in the die core 13 enable each component of the automotive hinge to obtain accurate shapes and dimensions, greatly improving the consistency and stability of the product, effectively reducing the defective rate, and meeting the strict requirements of the automotive manufacturing industry for high-precision components.

[0068] The integrated punching and assembling mechanism 6 realizes the precise assembly of the pin 9. Since the N-shaped workpiece 7 and the housing workpiece 8 perform punching operations synchronously, the concentricity of the assembly is maintained, and punching and pin assembly are completed synchronously during the stamping process, avoiding inaccurate assembly problems caused by human factors and environmental factors in traditional assembly methods. The stamping of both ends of the pin 9 by the stamping rod 62 forms firm stamping rivet heads 91, ensuring the connection strength and stability between the pin and the workpiece, improving the overall assembly quality and reliability of the automotive hinge, which is of great significance for the safety performance and long-term use stability of the vehicle and is suitable for popularization and application.

[0069] As described above, it is only the best implementation mode adopted by the present application in combination with current actual needs, but the protection scope of the present application is not limited thereto.

Claims

1. A stamping die rapid prototyping device, comprising a movable die set (1) and a fixed die set (2), for simultaneously stamping and forming an N-shaped workpiece (7) and a shell workpiece (8), and assembling a pin (9) between the N-shaped workpiece (7) and the shell workpiece (8), characterized in that: The movable die assembly (1) comprises a movable die seat (11), a die core (13) is fixed at the bottom of the movable die seat (11), a die column (14) is slidably connected to the die core (13) in a vertical direction, and a vertical slide groove (132) matching with and penetrating the die column (14) is provided on the die core (13); The fixed die assembly (2) comprises a fixed die seat (21), a male die core (22) is fixed on the top of the fixed die seat (21), one side of the fixed die seat (21) is slidably connected to a sliding mechanism (5) in a horizontal direction, one side of the male die core (22) is provided with a side cavity (222) matching the sliding mechanism (5), the sliding mechanism (5) and the side cavity (222) are matched to form a stamping cavity matching the N-type workpiece (7), the male die core (22) and the female die core (13) are matched to form a stamping cavity matching the shell workpiece (8), and a first arc portion (131) is provided in the female die core (13) for driving the edge of the flat shell workpiece (8) to bend; Punching assembly mechanisms (6) for forming a first punching hole (72) on the N-shaped workpiece (7) and a second punching hole (82) on the shell workpiece (8) are symmetrically provided on both sides of the fixed die seat (21); A material storage guide groove (4) for storing the pin (9) is provided on the top of the punching assembly mechanism (6) on one side; The top of the movable die assembly (1) is provided with a transmission mechanism (3) for driving the die column (14) and the die core (13) to move downward in steps.

2. A stamping die rapid prototyping device according to claim 1, characterized in that: The N-shaped workpiece (7) and the shell workpiece (8) are both plate-shaped structures before stamping; the N-shaped workpiece (7) is provided with a first assembly hole (71), and the shell workpiece (8) is provided with a second assembly hole (81); The top of the male die core (22) is provided with an alignment block (221) corresponding to the second assembly hole (81), and the bottom of the female die column (14) is provided with an alignment groove (141) corresponding to the alignment block (221).

3. A stamping die rapid prototyping device according to claim 1, characterized in that: The slide mechanism (5) comprises a main slide block (51), a side slide groove (223) is provided on one side of the punch core (22), the main slide block (51) is slidably connected to one side of the punch core (22) via a slide rail matching the side slide groove (223), the top of the main slide block (51) is rotatably connected to a flip slide block (53), a torsion spring is sleeved on the rotating shaft of the flip slide block (53), and the torsion spring has an elastic force to drive the flip slide block (53) to flip close to the inclined sleeve (52); Two right-angled bends are provided on both sides of the N-shaped workpiece (7), and the main positioning block (51) and the flip positioning block (53) are provided with a second arc portion (502) and a third arc portion (503) corresponding to the right-angled bends after being aligned.

4. A stamping die rapid prototyping device according to claim 3, characterized in that: An inclined sliding sleeve (52) is also fixed to the side of the main sliding block (51) away from the flip sliding block (53), and an inclined guide column (12) matching the inclined sliding sleeve (52) is fixed to one side of the movable mold base (11).

5. A stamping die rapid prototyping device according to claim 1, characterized in that: A plurality of upper sliding sleeves (111) are provided on the movable die seat (11), a sliding column (211) matching the upper sliding sleeves (111) is fixed on the fixed die seat (21), and a return spring (212) is sleeved on the sliding column (211), wherein the return spring (212) has an elastic force for driving the movable die seat (11) away from the fixed die seat (21).

6. A stamping die rapid prototyping device according to claim 1, characterized in that: The transmission mechanism (3) comprises a transmission sleeve (31), the top of the transmission sleeve (31) is fixedly connected to the output end of the main hydraulic mechanism, a transmission rod (32) is slidably connected in the vertical direction inside the transmission sleeve (31), a tensioning spring (33) is clamped between the transmission rod (32) and the transmission sleeve (31), and the tensioning spring (33) has an elastic force that drives the transmission rod (32) to move downward and contact the top of the die column (14).

7. A stamping die rapid prototyping device according to claim 3, characterized in that: The flip slider block (53) is provided with a punching slot (501) on one side opposite to the main slider block (51), and two groups of side holes (133) are symmetrically provided on both sides of the die core (13); The punching assembly mechanism (6) comprises a guide sleeve (61) fixed on the top of the fixed die seat (21), a punching rod (62) is slidably connected in the guide sleeve (61), and the ends of the two groups of punching rods (62) that are far away from each other are fixedly connected to the output end of the auxiliary hydraulic mechanism, a plurality of pins (9) are evenly spaced in the material storage guide groove (4), and a feed groove (611) is provided on the top of the guide sleeve (61) and is connected to the bottom of the material storage guide groove (4); A proximity sensor (201) for controlling the opening and closing of the punching assembly mechanism (6) is also fixed on one side of the top of the fixed die seat (21).

8. A stamping die rapid prototyping device according to claim 7, characterized in that: When the female die core (13) moves downward to mate with the male die core (22), the side hole (133) and the punching rod (62) are coaxially arranged; when the sliding mechanism (5) moves horizontally to mate with the side cavity (222) of the male die core (22), the punching groove (501) and the punching rod (62) are coaxially arranged.

9. A stamping die rapid prototyping device according to claim 8, characterized in that: A material return opening groove (1331) is provided on one side opposite to the side hole (133), and a groove depth of the material return opening groove (1331) is greater than twice the plate thickness of the N-shaped workpiece (7) or the shell workpiece (8).

10. A stamping die rapid prototyping device according to claim 9, characterized in that: The diameters of the pin (9), the punching rod (62) and the side hole (133) are all equal to the diameter of the punching slot (501), and the diameter of the material withdrawal opening slot (1331) is greater than the diameter of the punching slot (501); Both ends of the pin (9) are punched by the punching rod (62) to form punching rivet heads (91), and the diameter of the punching rivet heads (91) is smaller than the diameter of the material withdrawal opening groove (1331).

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