Continuous stamping die device of automobile bumper

Abstract

The continuous stamping die device of the automobile bumper comprises a stamping main workbench, stamping guide stand columns are fixed to the two sides of the top end of the stamping main workbench, and a stamping head mounting assembly is arranged between the stamping guide stand columns. A stamping head support guiding sliding rail used for lifting guiding is arranged at the connecting position of the stamping head installing assembly and the stamping guiding stand column, the center of the top end of the stamping head installing assembly is connected with the stamping main workbench through a lifting driving device, and a supporting transverse plate capable of being adjusted in a sliding mode is arranged on the stamping head installing assembly. A transverse plate positioning fixing seat for fixing the supporting transverse plate is arranged on the supporting transverse plate, a stamping head mounting frame is fixed below the supporting transverse plate, and a stamping head is fixed on the stamping head mounting frame. And through the matched design of the supporting transverse plate capable of being adjusted in a sliding mode and the transverse plate positioning fixing base, the transverse distribution position of the stamping head can be flexibly adjusted according to the requirements of automobile bumpers of different specifications and sizes.

Description

Technical Field

[0001] This invention relates to the field of continuous stamping technology, specifically to a continuous stamping die device for automobile bumpers. Background Technology

[0002] As an important safety protection component of a vehicle, the car bumper is often an irregular curved surface with a large size, which places extremely high demands on the precision, efficiency and stability of the stamping process.

[0003] Currently, automotive bumper stamping devices on the market generally suffer from the following problems: First, the installation position of the stamping head is mostly a fixed structure, which is difficult to adapt to the processing needs of bumpers of different specifications and sizes. The equipment has poor versatility, which leads to enterprises having to invest a lot of money to purchase multiple sets of special molds, increasing production costs. Second, the positioning stability of the workpiece during the stamping process is insufficient. The traditional fixed method is prone to uneven force on the workpiece, resulting in problems such as displacement and deformation. At the same time, there is a lack of effective buffer protection structure, and the workpiece surface is prone to scratches and dents, affecting the product qualification rate. Third, during continuous stamping, the lifting and guiding accuracy of the stamping head and the reciprocating motion of the worktable are not well coordinated, which can easily lead to stamping position deviation and discontinuous feeding, resulting in low processing efficiency and difficulty in meeting the needs of large-scale production. Fourth, the protective structure design of the existing device is not perfect. The splashing of debris generated during the stamping process can easily cause safety hazards, and the internal components are easily contaminated by dust and debris, affecting the service life of the equipment.

[0004] In addition, the adjustment and operation of some devices are cumbersome, making it difficult to quickly complete mold adaptation and adjustment, which further reduces production flexibility. Therefore, developing a versatile, easy-to-operate, safe and stable continuous stamping die device for automobile bumpers has become a technical problem that the industry urgently needs to solve. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a continuous stamping die device for automobile bumpers.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: a continuous stamping die device for an automobile bumper, comprising a main stamping worktable, stamping guide columns fixed on both sides of the top of the main stamping worktable, a stamping head mounting assembly disposed between the stamping guide columns, a stamping head bracket guide rail for lifting and guiding the stamping head mounting assembly and the stamping guide columns being provided at the connection point, the top center of the stamping head mounting assembly being connected to the main stamping worktable via a lifting drive device, a slidably adjustable support plate being provided on the stamping head mounting assembly, a plate positioning assembly for fixing the support plate being provided on the support plate, a stamping head mounting bracket being fixed below the support plate, and a stamping head being fixed on the stamping head mounting bracket. Multiple workpiece worktable guide rails are fixed at the top of the main stamping worktable, inside the stamping guide column. Workpiece worktables that can slide back and forth are provided on the workpiece worktable guide rails. The back of the workpiece worktable is connected to the main stamping worktable through a worktable reciprocating driver. A workpiece stabilizing component is provided inside the workpiece processing worktable.

[0007] Furthermore, the stamping head mounting assembly includes a stamping head bracket fixed between the stamping head bracket guide slide rails. A horizontal plate is fixed on the front surface of the stamping head bracket. A strip-shaped groove is formed at the center of the horizontal plate. The strip-shaped groove is slidably connected to multiple supporting horizontal plates. A sliding limit ring is fixed to the outer wall of the supporting horizontal plate at the connection between the strip-shaped groove and the stamping head mounting frame.

[0008] Furthermore, the lifting drive device includes a lifting bracket fixed at the rear center of the main stamping worktable surface, a lifting device is installed on the lifting bracket, and the output end of the lifting device passes through the lifting bracket and is fixedly connected to the stamping head bracket.

[0009] Furthermore, the horizontal plate positioning assembly includes a horizontal plate fastener threadedly connected inside the supporting horizontal plate, and a horizontal plate positioning fixing seat is rotatably connected to the top of the outer wall of the horizontal plate fastener.

[0010] Furthermore, the bottom end of the horizontal plate positioning and fixing seat is fixed with a plurality of insert rods for fixing and supporting the horizontal plate, and the supporting horizontal plate is provided with through holes that match the positions of the insert rods.

[0011] Furthermore, the workpiece stabilizing assembly includes a sealing plate that fits tightly against the inner wall of the workpiece worktable cavity. Multiple workpiece top columns are fixed to the top of the sealing plate, and multiple buffer components are fixed to the bottom of the sealing plate. A worktable bottom sealing plate is provided at the bottom of the buffer components. The worktable bottom sealing plate is connected to the workpiece worktable by bolts. A pneumatic sealing joint connected to the air pump supply pipe is provided at the center of the front surface of the workpiece worktable.

[0012] Furthermore, the workpiece worktable has multiple through holes that match the workpiece top column, and the outer wall of the workpiece top column is fitted with a rubber protective sleeve.

[0013] Furthermore, protective plates are fixed on both sides of the workpiece worktable, and rubber strips are fixed on the top of the protective plates. Worktable limiting components for limiting the workpiece worktable are fixed at both ends of the workpiece worktable guide rail of the stamping main worktable.

[0014] The beneficial effects of this invention are: High versatility: Through the cooperative design of the sliding and adjustable support plate and the plate positioning and fixing seat, the lateral distribution position of the stamping head can be flexibly adjusted according to the needs of car bumpers of different specifications and sizes. The stamping processing of multiple models of products can be realized without changing the entire set of molds, which greatly reduces the equipment investment cost and improves production flexibility. Improved product quality: The stamping guide column and the stamping head bracket guide rail form a dual guiding structure, ensuring the accuracy and stability of the stamping head's lifting movement and avoiding stamping position deviation. The workpiece stabilizing component provides uniform support through a pneumatically driven workpiece top column, and the buffer absorbs the stamping impact force, effectively preventing workpiece displacement and deformation. At the same time, the rubber protective sleeve can prevent scratches on the workpiece surface, significantly improving the accuracy and surface quality of the bumper stamping and increasing the product qualification rate. Improved processing efficiency: The lifting drive device and the reciprocating drive of the worktable work together to realize the automated cycle of pressing head lifting and workpiece conveying. It eliminates the need for frequent manual intervention, greatly improves the continuity and processing efficiency of continuous pressing, meets the needs of large-scale production, and is easy to adjust. The pressing head position can be quickly locked through the horizontal plate positioning and fixing seat, shortening the mold adaptation time. Stable structure: The main stamping worktable provides solid support for the overall structure. The rigid design of the stamping head bracket and the lifting device bracket enhances the overall load-bearing capacity of the device and disperses the stress concentration during the stamping process. The bottom sealing plate and protective plate of the worktable not only prevent the internal components from being contaminated by dust and debris, but also block debris from splashing during processing, ensuring operational safety and extending the service life of the equipment. Easy to operate and low maintenance cost: The connection structure of each component is reasonably designed. The bottom sealing plate of the workbench is bolted, which is convenient for disassembly and maintenance. The humanized operation design of the horizontal plate positioning and fixing seat reduces the labor intensity of operators. At the same time, the overall structure of the device is simple and convenient for subsequent maintenance, which further reduces the production and operation costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the present invention.

[0016] Figure 2 yes Figure 1 Partial view of the image.

[0017] Figure 3 yes Figure 1 A side view of the connection structure of the stamping structure.

[0018] Figure 4 yes Figure 1 Detailed diagram of the connection structure between the workpiece table and the table reciprocating drive.

[0019] Figure 5 yes Figure 1Detailed cross-sectional view of the connection structure at the middle horizontal plate position.

[0020] Figure 6 yes Figure 4 A top-down view of the connection structure details.

[0021] Figure 7 yes Figure 5 Detailed view of the right-side cross-section connecting structure.

[0022] Figure 8 yes Figure 1 Detailed cross-sectional view of the connection structure of the worktable for the medium-sized workpiece.

[0023] Explanation of reference numerals in the attached drawings: 1. Main stamping worktable; 2. Stamping guide column; 3. Stamping head bracket guide slide rail; 4. Stamping head bracket; 5. Lifter bracket; 6. Lifter; 7. Horizontal plate; 8. Supporting horizontal plate; 9. Horizontal plate fastener; 10. Horizontal plate positioning and fixing seat; 11. Stamping head mounting bracket; 12. Stamping head; 13. Workpiece worktable guide rail; 14. Workpiece worktable; 15. Worktable reciprocating drive; 16. Worktable limiting component; 17. Sealing support plate; 18. Workpiece top column; 19. Buffer component; 20. Worktable bottom sealing plate; 21. Protective plate; 22. Pneumatic sealing joint. Detailed Implementation

[0024] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0025] See Figures 1-8This is a schematic diagram of the structure of the present invention, a continuous stamping die device for an automobile bumper, including a main stamping worktable 1, which serves as the basic load-bearing structure of the entire stamping device, providing a stable support platform for all upper mounting components and workpiece processing, ensuring the overall structural stability during stamping operations, and avoiding deviations in processing accuracy due to vibration. Stamping guide columns 2 are fixed on both sides of the top of the main stamping worktable 1, serving a dual function of longitudinal guidance and structural support, providing a precise guiding reference for the lifting and lowering movement of the stamping head mounting assembly, while simultaneously enhancing the overall rigidity of the device and preventing defects during the stamping process. The stamping guide column 2 is now laterally deformed. A stamping head mounting assembly is set between the stamping guide column 2. It is the core component for installing and supporting the stamping head. It is responsible for driving the stamping head to realize the up and down reciprocating stamping action and transmitting the power of the lifting drive device to the stamping head to ensure the effective transmission of the stamping force. A stamping head bracket guide rail 3 for lifting and guiding is set at the connection between the stamping head mounting assembly and the stamping guide column 2. It can reduce the sliding friction between the stamping head mounting assembly and the guide column, making the lifting and lowering movement smoother and more stable. At the same time, it further improves the guiding effect and ensures the consistency of the stamping head's position for each stamping.

[0026] The top center of the stamping head mounting assembly is connected to the main stamping worktable 1 via a lifting drive device, providing power for the lifting of the stamping head mounting assembly and realizing automated control of the stamping action. The stamping stroke and speed can be adjusted to meet the stamping process requirements of different bumper specifications. The stamping head mounting assembly is equipped with a slidable adjustable support plate 8 for mounting and fixing the stamping head mounting bracket 11. Its sliding characteristic allows for flexible adjustment of the lateral distribution position of the stamping heads 12 according to different bumper sizes and stamping position requirements, improving the versatility of the device. The support plate 8 is equipped with a plate positioning component for fixing it. After the support plate 8 is adjusted into position, it is firmly secured by a locking mechanism. To prevent the support plate 8 from shifting due to vibration or impact during the stamping process and to ensure the accuracy of the stamping position, a stamping head mounting bracket 11 is fixed below the support plate 8. This bracket serves as a connecting carrier between the stamping head 12 and the support plate 8, fixing and supporting the stamping head 12. It also disperses the impact force transmitted by the stamping head 12, avoids local stress concentration, and extends the service life of the component. The stamping head 12 is fixed on the stamping head mounting bracket 11. It is the core execution component that directly contacts the bumper workpiece and performs stamping processing. Through its specific shape and structure, it converts power into stamping force to realize the bending, forming, and trimming processes of the bumper, ensuring the forming accuracy of the workpiece.

[0027] Multiple workpiece worktable guide rails 13 are fixed to the top of the main stamping worktable 1, inside the stamping guide column 2. These rails provide precise guidance for the forward and backward sliding of the workpiece worktable 14, ensuring a smooth and unbiased trajectory during reciprocating motion. This provides a stable workpiece conveying channel for continuous stamping operations. The workpiece worktables 14, which can slide forward and backward, are mounted on the workpiece worktable guide rails 13 to support the automotive bumper workpieces to be processed. They provide a flat and stable placement platform for the workpieces. Their sliding design enables continuous workpiece conveying, working in conjunction with the stamping head 12 to complete multiple continuous stamping processes, thus improving efficiency. To improve work efficiency, the back of the workpiece worktable 14 is connected to the main stamping worktable 1 via a worktable reciprocating drive 15, which provides power for the back-and-forth reciprocating motion of the workpiece worktable 14. The movement speed, stroke, and start / stop timing of the worktable can be controlled according to the stamping process rhythm to achieve coordinated workpiece conveying and stamping actions, ensuring the continuity of continuous stamping. The workpiece processing worktable 14 is equipped with a workpiece stabilizing component inside, which is used to fix and buffer the workpiece during the stamping process to prevent the workpiece from being displaced or deformed due to the stamping impact force, while reducing the damage to the workpiece surface caused by stamping and ensuring processing quality.

[0028] The stamping head mounting assembly includes a stamping head bracket 4 fixed between the stamping head support guide rails 3. As the main frame of the stamping head mounting assembly, it connects various components and integrates components such as the support plate 8 and the output end of the lifting drive device into a whole, ensuring the stability of power transmission and the integrity of the structure. A horizontal plate 7 is fixed on the front surface of the stamping head bracket 4, providing a mounting base and sliding track for the support plate 8. Its rigid structure can withstand the weight of the support plate 8 and the stamping head 12 and the impact force during the stamping process, ensuring the stable operation of the lateral adjustment mechanism. A strip groove is opened at the center of the horizontal plate 7 to provide space for the sliding of the support plate 8. Its length direction is adapted to the lateral dimension of the bumper to meet the processing requirements of workpieces of different widths. The strip groove is slidably connected to multiple support plates 8. A sliding limit ring is fixed on the outer wall of the support plate 8 at the connection between the strip groove and the stamping head mounting frame 11 to prevent it from falling out of the strip groove, while ensuring the verticality of the support plate 8 when sliding, and avoiding the impact of displacement on the stamping accuracy.

[0029] The lifting drive device includes a lifting bracket 5 fixed at the rear center of the main stamping worktable 1, providing a stable mounting support point for the lifting device 6. Its position design ensures that the output force of the lifting device 6 can be transmitted along the central axis, avoiding off-center load and ensuring the smoothness of the lifting movement. The lifting device 6, which is the core power component of the lifting drive device, is mounted on the lifting bracket 5. It can realize the lifting action according to the control signal, has sufficient output force to meet the stamping process requirements, and has good speed regulation and positioning performance. The output end of the lifting device 6 passes through the lifting bracket 5 and is fixedly connected to the stamping head bracket 4, which is used to directly transmit the power generated by the lifting device 6 to the stamping head bracket 4, ensuring the efficiency and accuracy of power transmission. The connection structure is firm and reliable and can withstand the impact and vibration during the stamping process.

[0030] The horizontal plate positioning assembly includes a horizontal plate fastener 9 threadedly connected inside the supporting horizontal plate 8. The fastener achieves locking and unlocking actions through threaded transmission, providing sufficient locking force to ensure the stability of the supporting horizontal plate 8 after it is fixed. The top of the outer wall of the horizontal plate fastener 9 is rotatably connected to a horizontal plate positioning fixing seat 10, providing operators with a convenient operating component. The horizontal plate fastener can be locked or unlocked by rotation, facilitating quick adjustment.

[0031] The bottom end of the horizontal plate positioning and fixing seat 10 is fixed with multiple insert rods for fixing the horizontal plate 8. Mechanical positioning is achieved by inserting them into the through holes of the horizontal plate 8, which further enhances the fixing effect and prevents the threaded connection from loosening. The fitting accuracy between the insert rods and the through holes is high, ensuring the positional accuracy of the horizontal plate 8 after it is fixed. The horizontal plate 8 is provided with through holes that match the position of the insert rods, providing an insertion channel for the insert rods. The positions of the through holes are reasonably distributed, which can meet the fixing requirements of the horizontal plate 8 in different adjustment positions.

[0032] The workpiece stabilizing assembly includes a sealing plate 17 that fits tightly against the inner wall of the workpiece worktable 14 cavity, serving a sealing and load-bearing function. It provides a mounting base for the buffer components 19 and workpiece top pillars 18, while ensuring the airtightness of the worktable and the effectiveness of pneumatic control. Multiple workpiece top pillars 18 are fixed to the top of the sealing plate 17 to support the workpiece from below, maintaining a flat processing posture. They can be flexibly distributed according to the workpiece shape and size to ensure uniform support points and prevent deformation caused by uneven stress. Multiple buffer components 19 are fixed to the bottom of the sealing plate 17 to absorb the impact force generated during stamping, providing cushioning and shock absorption, reducing damage to the workpiece and worktable, and improving the forming quality of the workpiece. A worktable bottom sealing plate 20 is provided at the bottom of the buffer components 19 to seal the bottom of the workpiece worktable 14, protecting the internal components from dust. To prevent contamination from debris and enhance the structural rigidity of the workbench, the bottom sealing plate 20 of the workbench is connected to the workpiece workbench 14 by bolts. The connection method is firm and reliable, and easy to disassemble and maintain. A pneumatic sealing joint 22 is provided at the center of the front surface of the workpiece workbench 14, which is connected to the air pump supply pipe. This is used to connect to an external air pump to provide pneumatic power for the workpiece stabilizing component, realizing the lifting or pressing action of the workpiece top column 18. The sealing performance is good, preventing gas leakage and ensuring the stability of pneumatic control. The workpiece workbench 14 has multiple through holes that match the workpiece top column 18, providing a channel for the lifting and lowering movement of the workpiece top column 18. The size of the through holes is adapted to the workpiece top column to ensure smooth movement without shaking. The outer wall of the workpiece top column 18 is fitted with a rubber protective sleeve to protect the workpiece surface, avoid direct contact between the top column and the workpiece to prevent scratches, and increase friction to improve the stability of the workpiece.

[0033] Protective plates 21 are fixed on both sides of the workpiece worktable 14 to provide safety protection and prevent external dust from entering the worktable area. Rubber strips are fixed to the top of the protective plates 21 to further enhance the protective effect, reduce the impact force during collisions, and prevent damage to the protective plates or workpieces. The stamping main worktable 1 is fixed at both ends of the workpiece worktable guide rail 13 with worktable limiters 16 for limiting the workpiece worktable 14, limiting the maximum stroke of the workpiece worktable, preventing it from exceeding the guide rail range and causing it to fall off or be damaged. At the same time, it provides a positioning reference for the worktable to ensure that the endpoint position of each reciprocating motion is consistent and to ensure the accuracy of continuous stamping.

[0034] When using this invention: First, the workpiece worktable 14 provides a flat and stable base for the bumper to be processed. The workpiece stabilization component uses pneumatic power to drive the support structure to uniformly support and fix the workpiece from below. At the same time, the buffer component absorbs the impact force that may be generated during the subsequent stamping process to avoid workpiece displacement, deformation or surface damage.

[0035] Subsequently, according to the specifications and dimensions of the bumper, the distribution position of the stamping head 12 is adjusted by the lateral adjustment mechanism. After the adjustment is in place, it is locked by the positioning and fixing structure to ensure accurate stamping position. After receiving the control signal, the lifting drive device generates power and transmits it to the stamping head mounting assembly through the transmission structure. Under the synergistic action of the stamping guide column 2 and the stamping head bracket guide slide rail 3, the stamping head 12 is driven to descend smoothly along the trajectory, converting the power into targeted stamping force to realize the bending, forming, and trimming processes of the bumper.

[0036] After a single stamping is completed, the lifting drive device drives the stamping head 12 to reset, and at the same time the reciprocating drive mechanism of the workpiece worktable 14 is started, pushing the workpiece worktable 14 to move along the workpiece worktable guide rail 13 to take out the workpiece. During this process, the limiting component strictly controls the movement stroke of the worktable, and the protective structure blocks the splashing of debris that may be generated during the processing, ensuring operational safety and processing accuracy. With the cyclical coordinated action of the stamping head and the worktable, the entire continuous stamping process of the car bumper is gradually completed.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A continuous punching die set for an automobile bumper, comprising a punching main table (1), characterized in that, The punch head mounting assembly is provided between the punch guide columns (2), and a punch head support guide sliding rail (3) for lifting and guiding is arranged at the connection position of the punch head mounting assembly and the punch guide columns (2). The top center of the punch head mounting assembly is connected with the punch main workbench (1) through a lifting driving device. A support horizontal plate (8) is arranged on the punch head mounting assembly and can be slidably adjusted. A horizontal plate positioning assembly is arranged on the support horizontal plate (8) and is fixed to the support horizontal plate (8). A punch head mounting frame (11) is fixed below the support horizontal plate (8). A punch head (12) is fixed to the punch head mounting frame (11). A plurality of workpiece workbench guide rails (13) are fixed to the inner side of the punch guide columns (2) at the top of the punch main workbench (1). A workpiece workbench (14) can slide forward and backward on the workpiece workbench guide rails (13). The back of the workpiece workbench (14) is connected with the punch main workbench (1) through a workbench reciprocating driver (15). A workpiece stabilizing assembly is arranged in the workpiece workbench (14).

2. A progressive stamping die apparatus for an automotive bumper as defined in claim 1 wherein: The punch head mounting assembly comprises a punch head support (4) fixed between the punch head support guide sliding rails (3). A horizontal plate (7) is fixed to the front surface of the punch head support (4). A strip-shaped sliding groove is formed in the center of the horizontal plate (7). The strip-shaped sliding groove is slidably connected with a plurality of support horizontal plates (8). The outer wall of the connection position of the support horizontal plate (8) and the punch head mounting frame (11) is fixed with a sliding limiting ring.

3. The apparatus of claim 1 wherein: The lifting driving device comprises a lifter support (5) fixed to the surface center of the punch main workbench (1) and located at a rear position. A lifter (6) is installed on the lifter support (5). The output end of the lifter (6) penetrates the lifter support (5) and is fixedly connected with the punch head support (4).

4. The apparatus of claim 1 wherein: The horizontal plate positioning assembly comprises a horizontal plate fastener (9) screwed in the inside of the support horizontal plate (8). A horizontal plate positioning fixing seat (10) is rotatably connected to the top end of the outer wall of the horizontal plate fastener (9).

5. The apparatus of claim 4 wherein: A plurality of insertion rods for fixing the support horizontal plate (8) are fixed to the bottom end of the horizontal plate positioning fixing seat (10). A through hole matched with the position of the insertion rod is formed in the support horizontal plate (8).

6. The apparatus of claim 1 wherein: The workpiece stabilizing assembly comprises a sealing supporting plate (17) closely fitted to the inner wall of the cavity of the workpiece workbench (14). A plurality of workpiece top columns (18) are fixed to the top end of the sealing supporting plate (17). A plurality of buffer members (19) are fixed to the bottom end of the sealing supporting plate (17). A workbench bottom sealing plate (20) is arranged at the bottom end of the buffer member (19). The workbench bottom sealing plate (20) is connected with the workpiece workbench (14) through bolts. A pneumatic sealing joint (22) connected with a gas pump gas conveying pipe is arranged at the center of the front surface of the workpiece workbench (14).

7. The apparatus of claim 6 wherein: A plurality of through holes matched with the workpiece top columns (18) are formed in the workpiece workbench (14). Rubber protective sleeves are sleeved on the outer walls of the workpiece top columns (18).

8. The apparatus of claim 1 wherein: Both sides of the workpiece workbench (14) are fixed with protective plates (21), the top end of the protective plate (21) is fixed with a rubber strip, and the stamping main workbench (1) is located at both ends of the workpiece workbench guide rail (13) and is fixed with a workbench limiting piece (16) for limiting the workpiece workbench (14).

Images