Automobile accessory stamping die with buffer assembly
By combining the mold rebound assembly and the pneumatic demolding assembly, the problem of mold damage when exposed to foreign objects or excessive pressure is solved, achieving contactless demolding and buffering, and improving production efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 嘉合顺智能制造(常熟)有限公司
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-21
AI Technical Summary
Existing molds cannot stop extrusion immediately when they sense foreign objects or excessive pressure, which can easily lead to damage. Furthermore, traditional demolding methods may cause mold damage or workpiece deformation.
The automotive parts stamping die with a buffer assembly includes a die springback assembly, a pneumatic demolding assembly, and an upper die assembly. It utilizes the wedge fit between the dovetail sliding seat and the sliding block, pneumatic demolding, and a hydraulic buffer system to achieve bidirectional buffering and non-contact demolding.
It effectively prevents mold damage, avoids workpiece deformation, achieves contactless demolding, and improves production efficiency and quality.
Smart Images
Figure CN224525844U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stamping die technology, specifically to a stamping die for automotive parts with a buffer component. Background Technology
[0002] Many automotive parts are produced using stamping dies. Stamping dies are special process equipment used in cold stamping to process metal or non-metal materials into parts or semi-finished products. Stamping dies play an indispensable role in the stamping process, greatly improving product production efficiency and quality. In existing technologies, when a mold senses a foreign object or excessive pressure, it cannot immediately stop the extrusion, which may damage the mold. It is also impossible to achieve contactless demolding, and violent demolding may damage the mold. Therefore, we propose a stamping die for automotive parts with a buffer component. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a stamping die for automotive parts with a buffer component. It can achieve buffering and stop immediately to prevent die damage when foreign objects or excessive pressure are detected. It can achieve non-contact demolding and prevent damage to the die due to violent demolding. It can effectively solve the problems in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a stamping die for automotive parts with a buffer assembly, comprising a lower die, a die springback assembly, a pneumatic demolding assembly, and an upper die assembly; The lower mold is equipped with a mold springback assembly, a pneumatic demolding assembly, and an upper mold assembly at the upper end. Mold springback assembly: includes a springback block, a connecting block, a dovetail-shaped sliding seat, a dovetail-shaped sliding block, and a spring. Two pressure sensors are embedded in the lower inner side of the lower mold, corresponding to the left and right sides. The springback block is slidably connected to the inner side of the lower mold. The lower end of the springback block is fixedly connected to the connecting block. The lower inner side of the lower mold is slidably connected to the connecting block. The lower end of the lower mold is fixedly connected to the dovetail-shaped sliding seat. Two dovetail-shaped sliding blocks are slidably connected to the inner side of the dovetail-shaped sliding seat. A spring is provided between the dovetail-shaped sliding blocks and the dovetail-shaped sliding seat. The two ends of the connecting strip are respectively hinged to the dovetail-shaped sliding block and the connecting block.
[0005] The rebound assembly uses a dovetail-shaped sliding seat and a wedge-shaped sliding block to achieve bidirectional buffering. A pressure sensor monitors the impact force in real time. A spring converts the vertical movement of the rebound block into the horizontal displacement of the sliding block through a connecting strip. Dual sensors detect the pressure on the buffer, and the dovetail structure enhances the purpose of precise positioning.
[0006] Furthermore, the pneumatic demolding assembly includes a cavity, an air outlet, a fan, and a connecting pipe. Two cavities are opened at the left and right ends of the inner side of the lower mold, and multiple air outlets are opened at the upper inner side of the cavity. The fan is fixedly connected to the rear end of the lower mold, and the air outlet of the fan is connected to the cavity through the connecting pipe.
[0007] The pneumatic demolding assembly forms an annular air chamber through the cavity. The fan distributes the high-pressure airflow to each air outlet through the connecting pipe, forming a uniform demolding force after stamping. The advantage is that it avoids the workpiece deformation caused by traditional ejector pins. The multi-hole array airflow makes demolding successful and the cavity structure also serves as a heat dissipation channel to reduce the mold temperature.
[0008] Furthermore, the upper mold assembly includes an upper mold, sealing cylinders, movable plug connecting rods, a liquid storage tank, a pressure sensor, and a connecting plate. Four sealing cylinders are fixedly connected to the four corners of the upper end of the upper mold. Movable plug connecting rods are slidably connected to the inner side of the sealing cylinders. The lower end of the connecting plate is fixedly connected to the movable plug connecting rods. Liquid storage tanks are fixedly connected to the front and rear ends of the upper end of the upper mold. The lower outer end of the sealing cylinders is connected to the lower outer end of the liquid storage tank through a connecting pipe. A pressure sensor is provided at the upper end of the pressure sensor.
[0009] The sealing cylinder and movable plug connecting rod of the upper mold assembly constitute a hydraulic buffer system. The reservoir realizes the circulation of damping fluid through the connecting pipe. The pressure sensor provides real-time pressure feedback. When the connecting plate is pressed down, the movable plug connecting rod inside the sealing cylinder moves down, and the damping fluid enters the reservoir through the pipe. The hydraulic buffer improves the energy absorption efficiency compared to the purely mechanical structure. The pressure sensor monitors the pressure inside the reservoir. When the pressure reaches the limit, it triggers the blocking parts to prevent the mold from rebounding.
[0010] Furthermore, the upper mold assembly also includes a limiting cylinder, a movable rod, a spring, and a crossbar. The limiting cylinder is fixedly connected to the lower middle part of the connecting plate. The movable rod is slidably connected to the inner side of the lower end of the limiting cylinder. A spring is sleeved on the outer side of the movable rod. The crossbar is fixedly connected to the upper end of the movable rod. The crossbar is slidably connected to the limiting cylinder.
[0011] The limiting cylinder has a movable rod inside. The spring absorbs the impact energy in the initial stage, and the crossbar can prevent it from rebounding when the pressure reaches the limit through the blocking device.
[0012] Furthermore, the upper mold assembly also includes a self-locking electric telescopic rod and a barrier rod. The self-locking electric telescopic rod is fixedly connected to the middle of the rear side of the lower end of the connecting plate, and the barrier rod is fixedly connected to the movable end of the self-locking electric telescopic rod.
[0013] The self-locking electric telescopic rod uses a barrier bar to engage with a crossbar during the mold's return stroke when the upper mold reaches its limit after being squeezed against a foreign object, forming a mechanical lock to prevent the upper mold from accidentally falling and reducing mold damage.
[0014] Furthermore, it also includes a lower mold mounting block, with two lower mold mounting blocks fixedly connected to the left and right ends of the lower mold, and threaded holes provided on the inner side of the lower mold mounting block.
[0015] The threads of the lower mold mounting block, together with the anti-loosening washer, enable the mold and the punch press to lock quickly.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This automotive parts stamping die with a buffer assembly has the following advantages: 1. This automotive parts stamping die with a buffer assembly has a hydraulic buffer system formed by the sealing cylinder and the movable plug connecting rod of the upper die assembly. The reservoir circulates damping fluid through the connecting pipe. The pressure sensor provides real-time pressure feedback. When the connecting plate presses down, the movable plug connecting rod inside the sealing cylinder moves downward, and the damping fluid enters the reservoir through the pipe. The hydraulic buffer improves the energy absorption efficiency compared to a purely mechanical structure. The pressure sensor monitors the pressure inside the reservoir. When the pressure reaches the limit, it triggers the parts that prevent the die from rebounding, thereby achieving buffering. It can also stop immediately when foreign objects are detected or the pressure is too high to prevent die damage.
[0017] 2. This automotive parts stamping die with a buffer component uses a pneumatic demolding component to form an annular air chamber through a cavity. The blower distributes the high-pressure airflow to each air outlet through a connecting pipe, forming a uniform demolding force after stamping. The advantage is that it avoids workpiece deformation caused by traditional ejector pins. The multi-hole array airflow makes demolding successful and the cavity structure also serves as a heat dissipation channel to reduce the mold temperature, thereby achieving non-contact demolding. Attached Figure Description
[0018] Fig. 1 This is a schematic diagram of the structure of this utility model; Fig. 2 This is a schematic diagram of the left side structure of this utility model; Fig. 3 This is a cross-sectional structural diagram of the present invention.
[0019] In the diagram: 1. Lower mold, 2. Lower mold mounting block, 3. Mold springback assembly, 31. Springback block, 32. Connecting block, 33. Dovetail sliding seat, 34. Dovetail sliding block, 35. Spring 1, 36. Connecting strip, 37. Pressure sensor, 4. Pneumatic demolding assembly, 41. Cavity, 42. Air outlet, 43. Fan, 44. Connecting pipe, 5. Upper mold assembly, 51. Upper mold, 52. Sealing cylinder, 53. Movable plug connecting rod, 54. Liquid storage tank, 55. Pressure sensor, 56. Connecting plate, 57. Limiting cylinder, 58. Movable rod, 59. Spring, 510. Crossbar, 511. Self-locking electric telescopic rod, 512. Barrier rod. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figs. 1-3 This embodiment provides a technical solution: a stamping die for automotive parts with a buffer assembly, including a lower die 1, a die springback assembly 3, a pneumatic demolding assembly 4, and an upper die assembly 5; Lower mold 1: The upper end is equipped with mold springback assembly 3, pneumatic demolding assembly 4 and upper mold assembly 5; Mold springback assembly 3: includes springback block 31, connecting block 32, dovetail sliding seat 33, dovetail sliding block 34 and spring 35. Two pressure sensors 37 are embedded in the middle of the lower inner side of the lower mold 1. Springback block 31 is slidably connected to the inner side of the lower mold 1. Connecting block 32 is fixedly connected to the lower end of springback block 31. Connecting block 32 is slidably connected to the lower inner side of the lower mold 1. Dovetail sliding seat 33 is fixedly connected to the lower end of the lower mold 1. Two dovetail sliding blocks 34 are slidably connected to the inner side of dovetail sliding seat 33. Spring 35 is provided between dovetail sliding block 34 and dovetail sliding seat 33. The two ends of connecting strip 36 are hinged to dovetail sliding block 34 and connecting block 32 respectively.
[0022] The rebound assembly uses a dovetail-shaped sliding seat 33 and a wedge-shaped sliding block 34 to achieve bidirectional buffering. The pressure sensor 37 monitors the impact force in real time. The spring 35 converts the vertical movement of the rebound block 31 into the horizontal displacement of the sliding block through the connecting strip 36. The dual sensors detect the pressure on the buffer, and the dovetail structure enhances the purpose of precise positioning.
[0023] The pneumatic demolding assembly 4 includes a cavity 41, an air outlet 42, a fan 43, and a connecting pipe 44. Two cavities 41 are opened at the left and right ends of the inner side of the lower mold 1. Multiple air outlets 42 are opened at the upper inner side of the cavity 41. The fan 43 is fixedly connected to the rear end of the lower mold 1. The air outlet of the fan 43 is connected to the cavity 41 through the connecting pipe 44.
[0024] The pneumatic demolding assembly 4 forms an annular air chamber through the cavity 41. The blower 43 distributes the high-pressure airflow to each air outlet 42 through the connecting pipe 44. After stamping, a uniform demolding force is formed. The advantage is that it avoids the workpiece deformation caused by traditional ejector pins. The multi-hole array airflow makes demolding successful and the cavity structure also serves as a heat dissipation channel to reduce the mold temperature.
[0025] The upper mold assembly 5 includes an upper mold 51, a sealing cylinder 52, a movable plug connecting rod 53, a liquid storage tank 54, a pressure sensor 55, and a connecting plate 56. Four sealing cylinders 52 are fixedly connected to the four corners of the upper end of the upper mold 51. The movable plug connecting rod 53 is slidably connected to the inner side of the sealing cylinder 52. The lower end of the connecting plate 56 is fixedly connected to the movable plug connecting rod 53. The liquid storage tank 54 is fixedly connected to the front and rear ends of the upper end of the upper mold 51. The lower outer end of the sealing cylinder 52 is connected to the lower outer end of the liquid storage tank 54 through a connecting pipe. A pressure sensor 55 is installed at the upper end of the pressure sensor 55.
[0026] The sealing cylinder 52 and the movable plug connecting rod 53 of the upper mold assembly 5 constitute a hydraulic buffer system. The reservoir 54 realizes the circulation of damping fluid through the connecting pipe. The pressure sensor 55 provides real-time pressure feedback. When the connecting plate 56 presses down, the movable plug connecting rod 53 inside the sealing cylinder 52 moves downward, and the damping fluid enters the reservoir 54 through the pipe. The hydraulic buffer improves the energy absorption efficiency compared with the pure mechanical structure. The pressure sensor 55 monitors the pressure inside the reservoir 54. When the pressure reaches the limit, it triggers the blocking parts to prevent the mold from rebounding.
[0027] The upper mold assembly 5 also includes a limiting cylinder 57, a movable rod 58, a spring 59, and a crossbar 510. The limiting cylinder 57 is fixedly connected to the lower middle part of the connecting plate 56. The movable rod 58 is slidably connected to the inner side of the lower end of the limiting cylinder 57. The spring 59 is sleeved on the outer side of the movable rod 58. The crossbar 510 is fixedly connected to the upper end of the movable rod 58. The crossbar 510 is slidably connected to the limiting cylinder 57.
[0028] The limiting cylinder 57 is internally composed of a movable rod 58. The spring 59 absorbs the impact energy in the initial stage and can pass through the blocking device via the crossbar 510 to prevent it from rebounding when the pressure reaches the limit.
[0029] The upper mold assembly 5 also includes a self-locking electric telescopic rod 511 and a barrier rod 512. The self-locking electric telescopic rod 511 is fixedly connected to the middle of the rear side of the lower end of the connecting plate 56, and the barrier rod 512 is fixedly connected to the movable end of the self-locking electric telescopic rod 511.
[0030] The self-locking electric telescopic rod 511, through the blocking rod 512, when it is squeezed to the limit by the foreign object, engages with the crossbar 510 during the mold return stroke to form a mechanical lock to prevent the upper mold from falling accidentally, thus reducing mold damage.
[0031] It also includes a lower mold mounting block 2. Two lower mold mounting blocks 2 are fixedly connected to the left and right ends of the lower mold 1. Threaded holes are opened on the inner side of the lower mold mounting block 2.
[0032] The thread of the lower mold mounting block 2, together with the anti-loosening washer, enables the mold and the punch press to be quickly locked together.
[0033] The working principle of the automotive parts stamping die with buffer assembly provided by this utility model is as follows: The operation process of the die system is as follows: First, the lower die 1 is fixed on the press through the threaded hole of the lower die mounting block 2; during stamping, the sealing cylinder 52 of the upper die assembly 5 compresses the damping fluid in the reservoir 54 through the movable plug connecting rod 53 to achieve hydraulic buffering, while the spring 59 in the limiting cylinder 57 absorbs the initial impact. When the pressure sensor 55 detects the pressure limit, the self-locking electric telescopic rod 511... The drive stop bar 512 locks the crossbar 510 to prevent rebound; after stamping, the blower 43 of the pneumatic demolding assembly 4 delivers airflow through the connecting pipe 44 to the cavity 41, and sprays it out from the air outlet 42 to achieve non-destructive demolding; during the stamping process, the spring block 31 of the mold springback assembly 3 drives the dovetail sliding block 34 to move horizontally in the dovetail sliding seat 33 through the connecting block 32, the spring 35 provides buffering force, and the pressure sensor 37 monitors the impact data.
[0034] It is worth noting that, in the above embodiments, the input terminals of the fan 43 and the self-locking electric telescopic rod 511 are electrically connected to the output terminal of the external power supply through an external PLC controller, and the output terminals of the pressure sensor 37 and the pressure sensor 55 are electrically connected to the external PLC controller. The external PLC controller controls the operation of the fan 43 and the self-locking electric telescopic rod 511 using methods commonly used in the prior art.
[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A stamping die for automotive parts with a buffer assembly, characterized in that: It includes a lower mold (1), a mold springback assembly (3), a pneumatic demolding assembly (4), and an upper mold assembly (5); Lower mold (1): The upper end is equipped with a mold springback assembly (3), a pneumatic demolding assembly (4) and an upper mold assembly (5); Mold springback assembly (3): includes springback block (31), connecting block (32), dovetail sliding seat (33), dovetail sliding block (34) and spring 1 (35). Two pressure sensors (37) are embedded in the middle of the lower inner side of the lower mold (1). Springback block (31) is slidably connected to the inner side of the lower mold (1). Connecting block (32) is fixedly connected to the lower end of springback block (31). Connecting block (32) is slidably connected to the lower inner side of the lower mold (1). Dovetail sliding seat (33) is fixedly connected to the lower end of the lower mold (1). Two dovetail sliding blocks (34) are slidably connected to the inner side of dovetail sliding seat (33). Spring 1 (35) is provided between dovetail sliding block (34) and dovetail sliding seat (33). The two ends of connecting strip (36) are hinged to dovetail sliding block (34) and connecting block (32) respectively.
2. The automotive parts stamping die with a buffer assembly according to claim 1, characterized in that: The pneumatic demolding assembly (4) includes a cavity (41), an air outlet (42), a fan (43), and a connecting pipe (44). The lower mold (1) has two cavities (41) on its inner left and right sides. The upper inner side of the cavity (41) has multiple air outlets (42). The lower mold (1) is fixedly connected to the rear end of the lower mold (1). The air outlet of the fan (43) is connected to the cavity (41) through the connecting pipe (44).
3. The automotive parts stamping die with a buffer assembly according to claim 1, characterized in that: The upper mold assembly (5) includes an upper mold (51), a sealing cylinder (52), a movable plug connecting rod (53), a liquid storage tank (54), a pressure sensor (55), and a connecting plate (56). Four sealing cylinders (52) are fixedly connected to the four corners of the upper end of the upper mold (51). The movable plug connecting rod (53) is slidably connected to the inner side of the sealing cylinder (52). The lower end of the connecting plate (56) is fixedly connected to the movable plug connecting rod (53). The liquid storage tank (54) is fixedly connected to the front and rear ends of the upper end of the upper mold (51). The lower outer end of the sealing cylinder (52) is connected to the lower outer end of the liquid storage tank (54) through a connecting pipe. A pressure sensor (55) is provided at the upper end of the pressure sensor (55).
4. The automotive parts stamping die with a buffer assembly according to claim 3, characterized in that: The upper mold assembly (5) also includes a limiting cylinder (57), a movable rod (58), a spring (59), and a crossbar (510). The lower middle part of the connecting plate (56) is fixedly connected to the limiting cylinder (57). The movable rod (58) is slidably connected to the inner side of the lower end of the limiting cylinder (57). The spring (59) is sleeved on the outer side of the movable rod (58). The upper end of the movable rod (58) is fixedly connected to the crossbar (510). The crossbar (510) is slidably connected to the limiting cylinder (57).
5. The automotive parts stamping die with a buffer assembly according to claim 3, characterized in that: The upper mold assembly (5) also includes a self-locking electric telescopic rod (511) and a barrier rod (512). The self-locking electric telescopic rod (511) is fixedly connected to the middle of the rear side of the lower end of the connecting plate (56), and the barrier rod (512) is fixedly connected to the movable end of the self-locking electric telescopic rod (511).
6. The automotive parts stamping die with a buffer assembly according to claim 1, characterized in that: It also includes a lower mold mounting block (2), and two lower mold mounting blocks (2) are fixedly connected to the left and right ends of the lower mold (1). The lower mold mounting block (2) has a threaded hole on its inner side.