Punch forming die for automobile door
By using multi-layered buffering and precise guidance from components such as guide sleeves, synchronous linkage rods, and impact dampers, the problem of severe vibration caused by single-spring buffering in existing molds has been solved, achieving high-precision door forming and stable mold operation, while reducing maintenance costs and operational risks.
Patent Information
- Application Number
- CN202511459430.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-13
- Publication Date
- 2025-12-12
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing automotive door stamping dies use a single spring buffer structure, which cannot adequately reduce the impact of mold closing, resulting in severe vibration. This affects the door forming accuracy and causes rapid wear of key die components, increasing maintenance costs.
By employing components such as guide sleeves, synchronous linkage rods, impact dampers, and mold closing drive cylinders, the impact force of mold closing is reduced through multi-layer buffering and precise guidance, ensuring stable mold operation and door forming accuracy.
It significantly reduces mold vibration amplitude, improves door forming accuracy, reduces trimming work, increases assembly efficiency, reduces maintenance costs, and enhances operational safety.
Smart Images
Figure CN121103953A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of automobile door processing, in particular to a stamping forming die for automobile door. BACKGROUND
[0002] In the field of automobile manufacturing, as a large thin-walled stamping part, the forming precision of automobile door directly affects the assembly precision and appearance quality of the vehicle body, so the stamping forming die for automobile door is the core equipment for door production. In the prior art, the conventional stamping forming die for automobile door usually includes a lower die base, an upper die assembly, a die closing driving mechanism and a basic guide structure, and basically can realize the stamping and shaping of the door blank. However, there are obvious deficiencies in die closing buffer and precision guarantee: The buffer system of the existing die mainly adopts a single spring buffer structure, which only absorbs the impact force generated during die closing through the elastic deformation of the spring. However, the die closing driving force is large and the impact load is concentrated during the stamping of the automobile door, and the single spring buffer is difficult to fully weaken the impact energy, which easily leads to severe vibration of the die as a whole. On the one hand, the vibration will damage the precise butt joint of the upper and lower dies, causing deviation in the guide cooperation between the upper die assembly and the lower die base, and further causing defects such as edge warping, local size out-of-tolerance or surface indentation of the stamped door, which requires additional correction processing, reducing production efficiency. On the other hand, long-term high-frequency vibration will exacerbate the wear of key components such as the lower die base, guide sliding sleeve and die handle fixed column, shorten the service life of the die, increase the equipment maintenance cost and downtime, and is difficult to meet the needs of large-scale and high-precision production of automobile doors. SUMMARY
[0003] The purpose of the present application is to provide a stamping forming die for automobile door, which solves the problem that the existing stamping forming die for automobile door cannot fully weaken the die closing impact due to the use of a single spring buffer structure, leading to severe vibration, and further causing poor door forming precision, rapid wear of die key components and high maintenance cost.
[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a stamping forming die for automobile door, comprising a lower die base, an impact damper fixed on the side wall of the lower die base, a die frame connecting plate fixedly connected to one end of the impact damper, and a guide sliding sleeve fixedly connected to one side of the die frame connecting plate; a die handle fixed column penetrates through the inner side of the guide sliding sleeve, and a die plate fixing block is fixedly arranged on the middle section of the die handle fixed column; a pre-press reset spring is fixedly connected to the surface of one end of the die plate fixing block; an upper die connecting lug is fixedly arranged on the top middle part of the guide sliding sleeve, and a synchronous linkage rod is connected to the other end of the upper die connecting lug; a lower die connecting lug is connected to the end of the synchronous linkage rod away from the upper die connecting lug, and a buffer pad is fixedly arranged on the top of the lower die connecting lug; and a guide column sliding groove is formed in the side wall of the lower die base.
[0005] Preferably, a quick positioning slot is provided at one end of the top of the lower mold base, and one end of the quick positioning slot is connected to a safety lock stop pin hole. A limit groove is distributed on one side of the quick positioning slot along the length direction of the lower mold base.
[0006] Preferably, a door lower mold base plate is detachably connected to the top center of the lower mold base, and a positioning block adapted to the corresponding slot of the lower mold base is fixed at the bottom corner of the door lower mold base plate. A workpiece positioning bracket is fixed at one end of the door lower mold base plate, and a precision guide hole is opened at the top corner of the door lower mold base plate.
[0007] Preferably, the inner wall of one end of the workpiece positioning bracket is provided with a material unloading relief groove, and the inner cavity of the material unloading relief groove is fixedly connected with an ejection reset spring. The other end of the ejection reset spring is fixedly connected with a safety protection locking rod, and the outer ring surface of one end of the safety protection locking rod is fitted with a part-removing auxiliary slide rail fixed to the side wall of the workpiece positioning bracket.
[0008] Preferably, a support adjustment rod is fixed at the top corner of the lower mold base, and an upper mold fixing plate is fixed at the top of the support adjustment rod. A mold closing drive cylinder is fixed at the top center of the upper mold fixing plate, and the output end of the mold closing drive cylinder extends vertically downward and is connected to a dynamic lifting mold base.
[0009] Preferably, the upper mold assembly of the car door is fixedly installed at the bottom center of the dynamic lifting mold base, and guide pillars are symmetrically distributed on both sides of the upper mold assembly of the car door. The guide pillars correspond to and are adapted to the precision guide holes of the lower mold base plate of the car door. Pressure transmission blocks are distributed on the outer side of the guide pillars, and an intelligent control terminal is fixedly installed on one side of the front end of the lower mold base.
[0010] Preferably, the inner wall of the guide sleeve has a hole with a diameter that matches the outer diameter of the mold handle fixing column, and the guide sleeve is slidably connected to the mold handle fixing column through pre-compression reset springs at both ends that abut against the template fixing block and the inner wall of the guide sleeve, respectively.
[0011] Preferably, the two ends of the synchronous linkage rod are rotatably connected to the top of the guide sleeve and the bottom side of the buffer pad through the upper mold connecting lug and the lower mold connecting lug, respectively, and the synchronous linkage rod is symmetrically and parallelly distributed along the vertical center line of the buffer pad.
[0012] Preferably, the safety protection locking rod is slidably connected to the workpiece positioning bracket via a push-out reset spring, and the safety protection locking rod is symmetrically distributed within the workpiece removal auxiliary slide rail along the vertical center line of the workpiece positioning bracket.
[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention allows for quick and direct fitting of the positioning insert at the bottom of the lower mold base plate to the top slot of the lower mold base, enabling initial calibration with the quick positioning slot at the top of the lower mold base, eliminating the need for additional measuring tools. After calibration, a locking element is inserted into the safety lock stop pin hole. Combined with the limiting grooves distributed along the length of the base, this restricts the displacement of the base plate in both the lateral and longitudinal directions, preventing loosening caused by stamping stress. When placing the workpiece, the workpiece automatically pushes the safety protection locking rod as it is pushed into the workpiece positioning slot, compressing the ejection return spring and sliding along the part removal auxiliary slide rail. Once the workpiece is fully in place, the ejection return spring automatically resets, causing the safety protection locking rod to form a ring-shaped limit on the workpiece. This eliminates the need for manual adjustment of the workpiece position and prevents the workpiece from shifting up and down or left and right during stamping. Compared to existing technologies, the positioning process of this mold requires no manual intervention, significantly improving assembly efficiency. Furthermore, the positioning stability remains consistent throughout the entire stamping cycle, effectively reducing the scrap rate of car doors caused by positioning problems.
[0014] In this invention, when the upper mold assembly of the car door is moved downward by the mold-closing drive cylinder, the guide sleeve slides along the mold handle fixed column with the force. The pre-compression reset spring, which abuts against the template fixing block and the inner wall of the guide sleeve at both ends, deforms first to absorb part of the impact force. At the same time, the impact damper on the side wall of the lower mold base weakens the vibration transmitted by the mold frame through the mold frame connecting plate, avoiding the impact from acting directly on the lower mold base. The symmetrically distributed synchronous linkage rods rotate with the guide sleeve as it moves, and work with the buffer pad to further disperse the impact force, so that the impact force during the mold closing process is gradually released, rather than acting instantaneously. In addition, the guide pillars on both sides of the upper mold assembly of the car door are matched with the precision guide holes of the lower mold base plate of the car door with zero clearance. During mold closing, the guide pillars are inserted into the guide holes throughout the process, correcting any possible offset of the mold body in real time, and ensuring precise docking of the upper and lower molds. Compared with the prior art, the vibration amplitude during the mold closing process of this mold is greatly reduced, the mold body docking accuracy is stable over a long period of time, the surface flatness of the stamped car door is higher, and the workload of subsequent trimming is reduced.
[0015] This invention allows for easy removal of the workpiece by gently pushing the safety locking rod inside the workpiece positioning holder, which compresses the ejector return spring. This causes the locking rod to slide along the workpiece removal auxiliary slide rail, releasing the workpiece from its limiting position. The workpiece is not tightly fitted to the inner wall of the holder, allowing for easy removal by hand or robotic arm without the need for any tools, thus preventing scratches or deformation. During the stamping process, the safety locking rod consistently limits the workpiece, preventing it from ejecting from the mold cavity even in unexpected situations. Furthermore, the mold's start and stop are entirely controlled by an intelligent control terminal at the front end of the lower mold base. Operators do not need to approach the mold body for operation. The terminal also features an emergency stop button to immediately cut off power in case of emergencies. Compared to existing technologies that require manual operation of hydraulic cylinder switches, this significantly improves safety. The mold's operation process is more ergonomic, reducing worker workload and creating a comprehensive safety barrier, minimizing accidents and workpiece damage caused by operational errors. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the surface structure of the lower mold base of the present invention; Figure 3 This is a further structural schematic diagram of the surface of the lower mold base of the present invention; Figure 4 This is a schematic diagram of the mold handle fixing column structure of the present invention; Figure 5 This is a schematic diagram of the dynamic lifting mold base structure of the present invention; Figure 6 This is a schematic diagram of the bottom plate structure of the lower mold of the car door according to the present invention; Figure 7 This is a schematic diagram of the workpiece positioning bracket structure of the present invention.
[0017] In the diagram: 1. Lower mold base; 2. Impact damper; 3. Mold frame connecting plate; 4. Guide sleeve; 5. Mold handle fixing column; 6. Template fixing block; 7. Pre-compression return spring; 8. Upper mold connecting lug; 9. Synchronous linkage rod; 10. Lower mold connecting lug; 11. Buffer pad; 12. Guide column sliding groove; 13. Quick positioning slot; 14. Safety lock stop pin hole; 15. Limiting groove; 16. Door lower mold base plate; 17. Positioning insert; 18. Workpiece positioning seat; 19. Precision guide hole; 20. Unloading relief groove; 21. Ejection return spring; 22. Safety protection lock rod; 23. Part removal auxiliary slide rail; 24. Support adjustment rod; 25. Upper mold fixing top plate; 26. Mold closing drive cylinder; 27. Dynamic lifting mold base; 28. Door upper mold assembly; 29. Guide column; 30. Pressure transmission block; 31. Intelligent control terminal. Detailed Implementation
[0018] 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.
[0019] Please see Figures 1-7As shown, the present invention provides a technical solution: an automotive door stamping die, wherein an impact damper 2 is fixed on the side wall of the lower die base 1, one end of which is connected to a guide sleeve 4 through a die frame connecting plate 3. A die handle fixing column 5 passes through the inner side of the guide sleeve 4. A template fixing block 6 in the middle section of the column and the inner wall of the guide sleeve 4 are connected by a pre-compressed reset spring 7 to achieve buffer reset. At the same time, the top of the guide sleeve 4 is connected to a synchronous linkage rod 9 through an upper die connecting lug 8. The other end of the linkage rod is connected to a buffer pad 11 through a lower die connecting lug 10. The linkage rods are symmetrically and parallelly distributed along the vertical center line of the buffer pad to strengthen the impact damper. To achieve a synchronous buffering effect, the side wall of the lower mold base 1 is also provided with a guide post sliding groove 12 to adapt to the sliding requirements of the component; a quick positioning slot 13 is opened on the top of the lower mold base 1, one end of which is connected to the safety lock stop pin hole 14. A limiting groove 15 is provided on one side of the slot along the length of the base to achieve quick positioning and locking. At the same time, the lower mold base 1 is detachably connected to the bottom plate 16 of the lower mold base 1. The bottom corner of the bottom plate is provided with a positioning insert 17 that matches the slot of the base to ensure accurate assembly of the bottom plate. A workpiece positioning slot 18 is fixed at one end of the bottom plate, and a precision guide hole 19 is opened at the top corner to specifically adapt to the positioning and subsequent guidance of automotive door workpieces. The workpiece positioning chuck 18 has a material unloading relief groove 20 on the inner side wall of one end. The inner cavity of the groove is fixed with an ejection return spring 21. The other end of the spring is connected to a safety protection locking rod 22. The outer ring of the locking rod is fitted with a part-removing auxiliary slide rail 23 fixed to the side wall of the chuck. The locking rod is slidably connected to the chuck through the ejection return spring and is symmetrically distributed along the vertical center line of the chuck, serving both safety protection and part-removing and unloading auxiliary functions. A support adjustment rod 24 is fixed at the top corner of the lower mold base 1. Its top end is connected to the upper mold fixed top plate 25. A mold closing drive cylinder 26 is fixed in the middle of the top end of the top plate. The output end of the cylinder is vertically connected to the dynamic lifting mold base 2. 7. The upper mold assembly 28 of the car door is fixed at the bottom center of the mold base to achieve precise mold closing and stamping of the car door. The upper mold assembly 28 of the car door is symmetrically provided with guide pillars 29 on both sides, which correspond and match the precision guide holes 19 of the lower mold base plate 16 of the car door to ensure mold closing accuracy. Pressure transmission blocks 30 are distributed on the outside of the guide pillars to assist in the uniform transmission of pressure. The intelligent control terminal 31 is fixed on one side of the front end of the lower mold base 1 to realize mold operation control. The dimensions and heights of each key component of the mold are matched, such as the inner diameter of the hole of the guide sleeve 4 being consistent with the outer diameter of the mold handle fixing column 5, and the guide pillars 29 precisely corresponding to the precision guide holes 19.
[0020] according to Figure 1 , Figure 2 and Figure 3As shown, the guide post sliding groove 12 is opened on the side wall of the lower mold base 1, which provides a stable sliding channel for the sliding parts in the mold (such as the related structure of the guide sleeve 4), ensuring that the parts slide smoothly during the operation of the mold and avoiding displacement that affects the overall coordination; the quick positioning slot 13 is opened at one end of the top of the lower mold base 1, which is a structure to realize the precise assembly of the lower mold base plate 16 of the car door. The positioning insert 17 at the bottom corner of the lower mold base plate 16 of the car door can be adapted and engaged with the slot to quickly complete the initial positioning of the base plate on the base; the safety lock stop pin hole 14 is connected to one end of the quick positioning slot 13, when the lower mold base plate of the car door... After the positioning insert 17 of 16 is inserted into the quick positioning slot 13, the locking element can be inserted into the safety lock stop pin hole 14 to lock and fix the base plate, preventing the base plate from shifting due to force during the stamping process; the limiting groove 15 is distributed on one side of the quick positioning slot 13 along the length direction of the lower mold base 1, further limiting and constraining the assembly position of the lower mold base plate 16 of the car door, and improving the positioning accuracy of the base plate in conjunction with the quick positioning slot 13, while avoiding the base plate from shifting along the length direction of the base. The four components work together to ensure the stable assembly of the lower mold base plate 16 of the car door and the smooth operation of the mold sliding components.
[0021] according to Figure 1 and Figure 4 As shown, the impact damper 2 is fixedly installed on the side wall of the lower mold base 1, and one end of it is fixedly connected to the mold frame connecting plate 3. As the initial buffer component of the mold buffer system, it can effectively weaken the impact force generated during the mold operation and provide a stable force transmission buffer foundation for the subsequent mold frame connecting plate 3 and related components. The mold handle fixing column 5 passes through the inner side of the guide sleeve 4, and the inner side wall of the guide sleeve 4 has a hole with a diameter that is completely matched with the outer diameter of the mold handle fixing column 5. A template fixing block 6 is fixedly installed in the middle section of the column. The guide sleeve 4 is slidably connected to the mold handle fixing column 5 through a pre-compression return spring 7 that abuts against the template fixing block 6 and the inner wall of the guide sleeve 4 at both ends. The mold handle fixing column 5 provides through support for the guide sleeve 4 and also provides through support for the guide sleeve 4 through the sliding connection with the guide sleeve 4. The dynamic coordination ensures the smoothness of the mold's buffer reset process. The buffer plate 11 is fixedly set on the top of the lower mold connecting lug 10. The end of the synchronous linkage rod 9 away from the upper mold connecting lug 8 is rotatably connected to the bottom side of the buffer plate 11 through the lower mold connecting lug 10. The synchronous linkage rod 9 is symmetrically and parallelly distributed along the vertical center line of the buffer plate 11. The buffer plate 11 provides stable support for the rotational connection between the lower mold connecting lug 10 and the synchronous linkage rod 9. On the other hand, in conjunction with the symmetrically distributed synchronous linkage rod 9, it further enhances the synchronous buffering effect during mold operation and reduces vibration interference during the stamping process. The three work together to ensure the stable operation and stamping accuracy of the automotive door stamping mold from three dimensions: impact reduction, sliding support, and synchronous buffering.
[0022] according to Figure 1 and Figure 5 As shown, the mold closing drive cylinder 26 is fixedly installed at the top center of the upper mold fixed top plate 25, and the upper mold fixed top plate 25 is stably supported by the support adjustment rod 24 fixed at the top corner of the lower mold base 1. The output end of the mold closing drive cylinder 26 extends vertically downward and is fixedly connected to the dynamic lifting mold base 27. In order to provide mold closing drive force, the extension and retraction of the output end drives the dynamic lifting mold base 27 to move up and down in the vertical direction, thereby realizing the mold closing and opening action. It is the key source of mold stamping power transmission. The upper mold assembly 28 of the car door is fixedly installed at the bottom center of the dynamic lifting mold base 27, and is distributed vertically and vertically corresponding to the lower mold base plate 16 of the car door that is detachably connected to the top of the lower mold base 1, forming the core mold for stamping the car door. The upper mold assembly 28 of the car door has symmetrically distributed guide pillars 29 on both sides. The guide pillars 29 are sized and positioned to match the precision guide holes 19 at the top corner of the lower mold base plate 16 of the car door. During the mold closing process, the upper mold assembly 28 of the car door can be precisely aligned with the lower mold base plate 16 of the car door to avoid mold body displacement. At the same time, pressure transmission blocks 30 are distributed on the outer side of the guide pillars 29 to assist in the uniform transmission of the mold closing driving force to the mold body and ensure the stability of the stamping pressure. The two work together, and the mold closing drive cylinder 26 provides power to drive the dynamic lifting mold base 27 to move the upper mold assembly 28 of the car door. The upper mold assembly 28 of the car door achieves precise mold closing with the help of the guide structure, which together provide power support and precision guarantee for the stamping of the car door.
[0023] according to Figure 6 and Figure 7As shown, the lower mold base plate 16 of the car door serves as the core load-bearing and positioning foundation of the lower mold. It is detachably connected to the top center of the lower mold base 1. A positioning block 17 is fixedly installed at the bottom corner. The positioning block 17 is adapted to and engages with the corresponding slot of the lower mold base 1, which can achieve precise positioning and stable assembly of the base plate on the base. The detachable design also facilitates subsequent maintenance or replacement. The workpiece positioning bracket 18 is fixedly connected to one end of the lower mold base plate 16 of the car door. It is the core pre-positioning structure of the stamped workpiece of the car door. The inner side wall of one end of the bracket has a material unloading relief groove 20. The inner cavity of the groove is fixedly connected to an ejection return spring 21. The other end of the spring is fixedly connected to a safety protection locking rod 22. The outer ring of the locking rod is fitted with a part removal auxiliary slide rail 23 fixed to the side wall of the bracket. The safety protection locking rod 22 is slidably connected to the workpiece positioning bracket 18 through the ejection return spring 21 and is symmetrically distributed along the vertical center line of the bracket, so that the workpiece The positioning bracket 18 not only ensures that the workpiece is in the correct processing position before stamping and avoids deviation that affects the forming accuracy, but also provides safety protection through the safety protection lock rod 22. It also assists in subsequent part removal and unloading with the help of the part removal auxiliary slide rail 23 and the ejection return spring 21. The precision guide hole 19 is opened at the top corner of the lower mold base plate 16 of the car door. It is size-matched and position-corresponding to the guide pillars 29 symmetrically distributed on both sides of the upper mold assembly 28 of the car door. During the mold closing process, the guide pillars 29 can be inserted into the precision guide hole 19 to accurately guide the upper mold assembly 28 of the car door to dock with the lower mold base plate 16 of the car door, effectively avoiding mold body deviation. The three work together with the lower mold base plate 16 of the car door as the carrier. The workpiece positioning bracket 18 realizes the accurate pre-positioning of the workpiece, and the precision guide hole 19 ensures the accurate docking of the upper and lower molds. Together, they provide positioning, guidance and load-bearing support for the lower mold end of the car door stamping and forming. They are key components to ensure stamping accuracy and operation convenience.
[0024] The overall effect achieved by the organization is as follows: First, preparatory operations are performed. The operator first aligns the lower mold base plate 16 of the car door with the corresponding slot at the top center of the lower mold base 1 using the positioning insert 17 at its bottom corner. At the same time, the position of the base plate is further calibrated using the quick positioning slot 13 at one end of the lower mold base 1. After positioning, a locking element is inserted into the safety lock stop pin hole 14 that communicates with the quick positioning slot 13. This, along with the limiting grooves 15 distributed along the length of the lower mold base 1 on one side of the quick positioning slot 13, ensures the stable fixation of the lower mold base plate 16 of the car door. Then, the car door workpiece to be stamped is placed in the workpiece positioning slot 18 at one end of the lower mold base plate 16. During the placement of the workpiece, the workpiece positioning slot 18 will push the safety protection in the unloading relief slot 20 on the inner side wall of the workpiece positioning slot 18. Locking rod 22 compresses the ejector return spring 21 and slides along the part removal auxiliary slide rail 23. After the workpiece is fully placed, the ejector return spring 21 resets and pushes the safety locking rod 22 to reset, thus limiting and locking the workpiece to ensure that it is in the correct processing position before stamping and will not deviate. After the pre-preparation is completed, the operator starts the mold through the intelligent control terminal 31 on one side of the front end of the lower mold base 1. The intelligent control terminal 31 issues a command to start the mold closing drive cylinder 26 fixed at the top center of the upper mold fixed top plate 25. The upper mold fixed top plate 25 is stably supported by the support adjustment rod 24 fixed at the top corner of the lower mold base 1. The output end of the mold closing drive cylinder 26 extends vertically downward and drives the dynamic lifting mold base 27 connected to it along the... As the car door upper mold assembly 28 descends vertically, the dynamic lifting mold base 27, whose bottom center is fixed, moves downwards accordingly. During this descent, the guide pillars 29 symmetrically distributed on both sides of the car door upper mold assembly 28 gradually insert into the precision guide holes 19 opened at the top corner of the car door lower mold base plate 16. Through the matching and cooperation between the guide pillars 29 and the precision guide holes 19, the car door upper mold assembly 28 is guided to precisely align with the car door lower mold base plate 16, preventing mold body displacement. At the same time, the descent of the car door upper mold assembly 28 indirectly drives the related structural movements of the guide sleeve 4. The guide sleeve 4 is connected to the impact damper 2 fixed to the side wall of the lower mold base 1 through the mold frame connecting plate 3. The mold handle fixing column 5 penetrating the inner side of the guide sleeve 4 has a template fixing block 6 fixed in the middle section. The guide sleeve 4 is connected to the mold base 1 through both ends. The pre-compression return spring 7, which abuts against the inner wall of the template fixing block 6 and the guide sleeve 4, forms a sliding connection with the mold handle fixing column 5. Under the force brought by the downward movement of the upper mold assembly 28 of the car door, the guide sleeve 4 slides along the mold handle fixing column 5, and the pre-compression return spring 7 deforms to achieve initial buffering. At the same time, the synchronous linkage rod 9, which is connected to the top of the guide sleeve 4 through the upper mold connecting lug 8, moves accordingly. The other end of the synchronous linkage rod 9 is connected to one side of the bottom of the buffer pad 11 through the lower mold connecting lug 10. The synchronous linkage rod 9 is symmetrically and parallelly distributed along the vertical center line of the buffer pad 11. During the movement, the synchronous linkage rod 9, together with the buffer pad 11, further weakens the impact force. The impact damper 2 also plays a role at the same time, effectively absorbing the impact generated by the mold operation and ensuring a smooth mold closing process.After the upper mold assembly 28 and the lower mold base plate 16 of the car door are fully closed, the mold closing drive cylinder 26 continuously outputs pressure. The pressure is transmitted to the upper mold assembly 28 of the car door through the dynamic lifting mold base 27. The pressure transmission blocks 30 distributed on the outside of the upper mold assembly 28 of the car door evenly transmit the pressure to the car door workpiece, so that the workpiece undergoes plastic deformation under the action of the upper mold assembly 28 and the lower mold base plate 16 of the car door, and is finally stamped into the shape of a car door. After the stamping is completed, the intelligent control terminal 31 issues a mold opening command, and the output end of the mold closing drive cylinder 26 retracts in the opposite direction, driving the dynamic lifting mold base 27 and the upper mold assembly 28 of the car door to rise vertically. The guide pillar 29 exits from the precision guide hole 19 The guide sleeve 4 is pulled out, and under the reset force of the pre-compressed reset spring 7, it slides in the opposite direction along the mold handle fixed column 5. The synchronous linkage rod 9, impact damper 2, and other structures also reset accordingly. After the upper mold assembly 28 of the car door rises to the safe position, the operator manually or through auxiliary equipment pushes the safety protection locking rod 22 in the workpiece positioning holder 18, so that the safety protection locking rod 22 compresses and ejects the reset spring 21 again and slides along the part removal auxiliary slide rail 23, releasing the limit on the stamped car door workpiece. Then the workpiece is taken out from the workpiece positioning holder 18, completing one car door stamping operation. If continuous operation is required, the above pre-preparation-mold closing stamping-mold opening and part removal process can be repeated.
[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A stamping die for an automobile door, comprising a lower die base (1), an impact damper (2) fixedly mounted on the side wall of the lower die base (1), a die frame connecting plate (3) fixedly connected to one end of the impact damper (2), and a guide sleeve (4) fixedly connected to one side of the die frame connecting plate (3), characterized in that: The inner side of the guide sleeve (4) is penetrated by a mold handle fixing column (5), and a template fixing block (6) is fixed in the middle section of the mold handle fixing column (5). A pre-compression reset spring (7) is fixedly connected to one end of the template fixing block (6). An upper mold connecting ear (8) is fixed in the middle of the top of the guide sleeve (4), and a synchronous linkage rod (9) is connected to the other end of the upper mold connecting ear (8). A lower mold connecting ear (10) is connected to the end of the synchronous linkage rod (9) away from the upper mold connecting ear (8), and a buffer pad (11) is fixed to the top of the lower mold connecting ear (10). A guide column sliding groove (12) is opened on the side wall of the lower mold base (1).
2. The automobile door stamping die according to claim 1, characterized in that: The top end of the lower mold base (1) is provided with a quick positioning slot (13), and one end of the quick positioning slot (13) is connected to a safety lock stop pin hole (14). A limit groove (15) is distributed on one side of the quick positioning slot (13) along the length direction of the lower mold base (1).
3. The automobile door stamping die according to claim 1, characterized in that: The lower mold base (1) is detachably connected to the middle of the top of the door lower mold base (1), and a positioning block (17) adapted to the corresponding slot of the lower mold base (1) is fixed at the bottom corner of the door lower mold base (16). A workpiece positioning bracket (18) is fixed at one end of the door lower mold base (16), and a precision guide hole (19) is opened at the top corner of the door lower mold base (16).
4. The automobile door stamping die according to claim 3, characterized in that: The inner wall of one end of the workpiece positioning bracket (18) is provided with a material unloading relief groove (20), and the inner cavity of the material unloading relief groove (20) is fixedly connected with a push-out reset spring (21). The other end of the push-out reset spring (21) is fixedly connected with a safety protection lock rod (22), and the outer ring surface of one end of the safety protection lock rod (22) is fitted with a part-removing auxiliary slide rail (23) fixed to the side wall of the workpiece positioning bracket (18).
5. The automobile door stamping die according to claim 1, characterized in that: A support adjustment rod (24) is fixed at the top corner of the lower mold base (1), and an upper mold fixing plate (25) is fixed at the top of the support adjustment rod (24). A mold closing drive cylinder (26) is fixed at the middle of the top of the upper mold fixing plate (25), and the output end of the mold closing drive cylinder (26) extends vertically downward and is connected to a dynamic lifting mold base (27).
6. The automobile door stamping die according to claim 5, characterized in that: The bottom center of the dynamic lifting mold base (27) is fixed with the upper door mold assembly (28), and the upper door mold assembly (28) is symmetrically distributed with guide pillars (29) on both sides. The guide pillars (29) are matched with the precision guide holes (19) of the lower door mold base plate (16). Pressure transmission blocks (30) are distributed on the outer side of the guide pillars (29), and an intelligent control terminal (31) is fixed on one side of the front end of the lower mold base (1).
7. The automobile door stamping die according to claim 1, characterized in that: The inner wall of the guide sleeve (4) has a hole with a diameter that matches the outer diameter of the mold handle fixing column (5). The guide sleeve (4) is slidably connected to the mold handle fixing column (5) through a pre-compression reset spring (7) that abuts against the template fixing block (6) and the inner wall of the guide sleeve (4) at both ends.
8. The automobile door stamping die according to claim 1, characterized in that: The two ends of the synchronous linkage rod (9) are rotatably connected to the top of the guide sleeve (4) and the bottom side of the buffer pad (11) respectively through the upper mold connecting lug (8) and the lower mold connecting lug (10), and the synchronous linkage rod (9) is symmetrically and parallelly distributed along the vertical center line of the buffer pad (11).
9. The automobile door stamping die according to claim 4, characterized in that: The safety protection lock rod (22) is slidably connected to the workpiece positioning bracket (18) through the ejection reset spring (21), and the safety protection lock rod (22) is symmetrically distributed in the workpiece picking auxiliary slide rail (23) along the vertical center line of the workpiece positioning bracket (18).