Moving table for automatic press line of large mechanical presses

Abstract

This invention relates to the field of mechanical press technology and discloses a movable worktable for an automatic stamping line of a large mechanical press. The worktable includes a carriage, a track, and rollers, and also includes two worktables. Each worktable can independently mount two sets of molds. When changing molds, the carriage is moved along the Y-axis to switch between the two sets of molds, facilitating installation by technicians. A lifting mechanism is provided on the worktables, using multiple lifting columns to extend the lower mold from multiple circular holes on the worktable along the Z-axis during mold changing, facilitating adjustment of the lower mold's mounting position. A lateral movement mechanism is located between the worktables and the carriage, enabling movable mounting of the worktables to the upper part of the carriage. This technical solution, by designing a double worktable, allows for the installation of two sets of molds, significantly reducing downtime during mold changes, simplifying the mold changing process, and achieving the effect of changing molds while working, thus ensuring the working efficiency of the press.

Description

Technical Field

[0001] This invention relates to the field of mechanical press technology, specifically to a moving worktable in an automatic stamping line for large mechanical presses. Background Technology

[0002] The worktable of a press is one of its most crucial components, playing a vital role in supporting and bearing weight. This is the worktable's most basic function, primarily supporting the lower die. The worktable provides a large, sturdy, and flat platform for mounting and securing the lower half of the die. During the stamping process, the worktable must withstand enormous pressure, impact, and torque from the slide (upper die). It must possess extremely high strength and rigidity to ensure stability throughout the processing, preventing deformation or breakage. The worktable integrates multiple interfaces, enabling the press to perform complex machining tasks. The worktable surface is typically machined with neatly arranged T-slots or screw holes. These structures are used to firmly clamp and fix the die to the worktable using bolts, pressure plates, and other tools, ensuring the die does not shift under enormous impacts, guaranteeing machining accuracy and safety. Furthermore, the worktables of large presses are usually very heavy, which helps absorb and buffer the enormous vibrations and impacts generated during stamping, reducing interference with the machine tool foundation and the external environment, and improving equipment lifespan and stability.

[0003] Currently, existing workbenches typically have one set of molds installed. The machine needs to be stopped and the molds removed from under the press before they can be disassembled and replaced. After that, the new molds are reinstalled and the pipelines are connected before the molds are moved back under the press. This makes mold replacement time long and requires a long time to calibrate the mold installation position, which affects the working efficiency of the press. Summary of the Invention

[0004] Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a movable worktable for an automatic stamping line of a large mechanical press. This solves the problem that traditional worktables require stopping the machine, moving the mold out of the press before it can be disassembled and replaced, then reinstalling the new mold and connecting the pipeline before moving the mold back to the press. This results in a long mold replacement time and requires a considerable amount of time to calibrate the mold's installation position, which affects the working efficiency of the press.

[0006] Technical solution To achieve the above objectives, the present invention provides the following technical solution: a moving worktable for an automatic stamping line of a large mechanical press, comprising a car body, a track, and rollers, and further comprising: Two worktables are provided, each capable of independently mounting two sets of molds. When changing molds, the vehicle body can be moved along the Y-axis to switch between the two sets of molds, facilitating installation by technicians. A lifting mechanism is provided on the worktables, which uses multiple top columns to lift the lower mold out of multiple round holes on the worktables along the Z-axis during mold changing, making it easy to adjust the installation position of the lower mold. The lateral shifting mechanism is set between the worktable and the vehicle body, so that the worktable and the upper part of the vehicle body can be movably installed, and both worktables can be moved laterally in the X-axis direction to send the replacement mold out from under the hydraulic press slider, which is convenient for hoisting the mold on the worktable. The drive mechanism employs a gear and rack meshing transmission, with the rack mounted on one side of the track. This ensures precise stopping by preventing the vehicle body from slipping during the movement of the transport mold.

[0007] As a further description of the above technical solution, the worktable is a rectangular box structure with a base plate fixed at the bottom. The base plate is connected to the side-shifting mechanism. The upper end of the worktable is provided with multiple T-shaped fixing slots for fixing the mold with the fixing components. Multiple round holes are evenly opened between two adjacent T-shaped fixing slots. The multiple round holes are distributed in an array. A guide sleeve is installed in the round hole to guide and support the top column. The top column of the lifting mechanism extends out from the guide sleeve to lift the mold.

[0008] As a further description of the above technical solution, the lifting mechanism includes a rectangular plate sleeved inside the worktable. Multiple top columns are arranged in a rectangular array and sleeved inside a guide sleeve. The lower end of each top column is fixed to the upper end of the rectangular plate. A grid-shaped support frame is provided at the lower end of the rectangular plate. Two rotating shafts are provided at the lower end of the support frame. Eccentric wheels are fixedly connected to the shaft walls of both rotating shafts. One side of each eccentric wheel contacts the support frame. The shaft walls of the rotating shafts are rotatably connected to the worktable via rolling bearings. Two transmission rods are fixedly connected to the shaft walls of the rotating shafts. One end of each transmission rod is rotatably connected to a first double-acting hydraulic cylinder via a pin. The sidewall of the first double-acting hydraulic cylinder is rotatably connected to the inner side of the worktable via a hinged seat.

[0009] As a further description of the above technical solution, the upper end of the top column is provided with a groove, a ball is provided in the groove, a pressure ring is sleeved on the side wall of the ball, the inner side of the pressure ring matches the side wall of the ball, and the pressure ring is fixed to the upper end of the top column by bolts.

[0010] As a further description of the above technical solution, multiple guide posts are sleeved at the four corners of the rectangular plate through guide holes. The upper ends of the multiple guide posts are fixed to the upper inner wall of the workbench, and the lower ends of the guide posts are fixed to the upper end of the base.

[0011] As a further description of the above technical solution, the lateral displacement mechanism includes a plurality of second bidirectional hydraulic cylinders. One end of each of the second bidirectional hydraulic cylinders is fixed to the upper end of the vehicle body. A brake plate is fixedly connected to the output end of the second bidirectional hydraulic cylinder. The brake plate is fixed to the lower end of the worktable. A guide rail is fixedly connected to the lower end of the worktable. A guide groove that slides with the guide rail is fixedly connected to the upper end of the vehicle body. A fixing plate is sleeved on the output shaft of the second bidirectional hydraulic cylinder. Two fixing bolts are sleeved on one side of the brake plate through an mounting port. One side of the fixing plate is fixedly connected to the fixing bolts through a threaded hole.

[0012] As a further description of the above technical solution, the drive mechanism includes a geared motor, which is provided with two main shafts for outputting power. Both main shafts are rotatably connected to the vehicle body through rolling bearings. One end of each main shaft passes through the rolling bearings and is fixedly connected to a worm gear. A worm wheel meshes with one side of the worm gear. A half-shaft is fixedly connected to the lower end of the worm wheel. The half-shaft is rotatably connected to the side wall of the vehicle body through needle roller bearings. A gear is fixedly connected to the lower end of the half-shaft. The gear meshes with one side of a rack. The rack is fixed to one side of the track. Two active braking devices are provided on the shaft wall of the main shaft, and both active braking devices are installed on the bottom inner wall of the vehicle body.

[0013] As a further description of the above technical solution, the active braking device includes a fixed base, and each of the four corners of the fixed base is fitted with a pull rod through a through hole. One end of the multiple pull rods is fixedly connected to a first brake block, and the other end is fixedly connected to a push plate. A second brake block is provided on one side of the first brake block. Each of the four corners of the second brake block is fitted with the rod wall of the multiple pull rods through a directional hole. The main shaft is located between the first brake block and the second brake block. The side wall of the fixed base is provided with an assembly hole, and a brake cylinder is provided in the assembly hole. One end of the brake cylinder is fixedly connected to one side of the push plate, and the other end of the brake cylinder is fixedly connected to one side of the second brake block.

[0014] As a further description of the above technical solution, a sleeve is fixedly connected to the shaft wall of the main shaft, and grooves that cooperate with the side wall of the sleeve are opened on the opposite side of the first brake block and the second brake block.

[0015] As a further description of the above technical solution, multiple rollers are provided and installed at the four corners of the vehicle body. The edge of the roller is provided with a limiting flange that is engaged with the upper end of the track. Protective plates are provided at the four corners of the vehicle body. The side wall of the vehicle body is rotatably connected to a gear shaft through a rolling bearing. The gear shaft meshes with a rack.

[0016] Beneficial effects Compared with the prior art, the present invention provides a moving worktable for an automatic stamping line of a large mechanical press, which has the following advantages: This technical solution, by adopting a dual-worktable design, allows for the installation of two sets of molds under one press, improving the efficiency of mold replacement. During replacement, simply remove the upper mold after mold closing, then move the carriage to position the mold to be replaced under the press slide. Connecting the upper mold and quick-release piping completes the mold replacement operation. The removed mold is then directly moved under the press slide, allowing technicians to lift and replace it or perform maintenance. During operation, the mold is not located under the press, and the mold installed under the press can function normally. Compared to traditional single-mold installation worktables, which require stopping the machine, lifting, installing, positioning the mold, and connecting piping, this technical solution significantly reduces downtime, simplifies mold replacement procedures, and enables simultaneous operation and replacement, ensuring the press's operational efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the moving worktable of the automatic stamping line for a large mechanical press proposed in this invention. Figure 2 This is a schematic diagram of the lateral displacement mechanism in the moving worktable of the automatic stamping line of a large mechanical press proposed in this invention; Figure 3 This is a schematic diagram of the worktable and lifting mechanism in the moving worktable of the automatic stamping line of the large mechanical press proposed in this invention. Figure 4 This is a schematic diagram of the lifting mechanism in the moving worktable of the automatic stamping line of a large mechanical press proposed in this invention. Figure 5 This is a schematic diagram of the top column, ball bearings, and pressure ring in the moving worktable of the automatic stamping line of the large mechanical press proposed in this invention. Figure 6 This is a schematic diagram of the internal structure of the moving workbench of the automatic stamping line for a large mechanical press proposed in this invention. Figure 7 This is a schematic diagram of the drive mechanism in the moving worktable of the automatic stamping line of the large mechanical press proposed in this invention. Figure 8 This is a schematic diagram of the active braking mechanism in the moving worktable of the automatic stamping line of a large mechanical press proposed in this invention.

[0018] In the diagram: 1. Workbench; 2. Base plate; 3. Car body; 4. Rail; 5. Brake plate; 6. Fixing plate; 7. Guide groove; 8. Guide rail; 9. Second bidirectional hydraulic cylinder; 10. Circular hole; 11. Rectangular plate; 12. Top column; 13. Guide sleeve; 14. T-shaped fixing groove; 15. Rotating shaft; 16. First bidirectional hydraulic cylinder; 17. Guide column; 18. Transmission rod; 19. Eccentric wheel; 20. Support frame; 21. Ball bearing; 22. Pressure ring; 23. Main shaft; 24. Gear motor; 25. Push plate; 26. Roller; 27. Rack; 28. Gear shaft; 29. ​​Gear; 30. Worm gear; 31. Worm; 32. First brake block; 33. Second brake block; 34. Fixing seat; 35. Pull rod; 36. Sleeve; 37. Brake cylinder. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example: See attached document Figure 1-8 The moving worktable of the large-scale mechanical press automatic stamping line includes a car body 3, a track 4, and rollers 26, and also includes: Two worktables 1, two worktables 1 can independently install two sets of molds. When changing molds, the two sets of molds can be switched by moving the vehicle body 3 in the Y-axis direction, which is convenient for technicians to install. That is, when one set of molds is in working state, the other set of molds is outside the hydraulic press slider, which makes it convenient for technicians to disassemble and replace the molds. Furthermore, a lifting mechanism is provided on the worktable 1. The lifting mechanism uses multiple top columns 12 to push the lower mold out of multiple round holes 10 on the worktable 1 in the Z-axis direction during mold changing. By using the lifting mechanism, the mold can be lifted away from the upper end of the worktable 1, which makes it convenient for technicians to adjust the installation position of the lower mold when changing the mold. To facilitate mold replacement, this technical solution also includes a side-shifting mechanism on the worktable 1. The side-shifting mechanism is located between the worktable 1 and the vehicle body 3, enabling the worktable 1 and the upper part of the vehicle body 3 to be movably installed. This allows both worktables 1 to move laterally in the X-axis direction to send the replacement mold out from under the hydraulic press slider, facilitating the hoisting of the mold on the worktable 1. A drive mechanism is also installed inside the vehicle body. The drive mechanism uses gear 29 and rack 27 meshing for transmission. The rack 27 is installed on one side of the track 4. It can achieve precise stopping by preventing the vehicle body 3 from slipping when the transport mold moves. The gear linkage between gear 29 and rack 27 can ensure the stability during driving and can also achieve braking by meshing the gears, making it convenient to control the movement of the vehicle body 3.

[0021] This technical solution, by adopting a dual-worktable design 1, allows for the installation of two sets of molds under one press, improving the efficiency of mold replacement. During replacement, only the upper mold needs to be removed after mold closing. Then, the carriage 3 is moved to position the mold to be replaced under the press slide. Connecting the upper mold and quick-release piping completes the mold replacement operation. The removed mold is directly moved under the press slide, allowing technicians to lift and replace it or perform maintenance. During operation, the mold is not located under the press, and the mold installed under the press can function normally. Compared to traditional single-mold installation worktables, which require stopping the machine, lifting, installing, positioning the mold, and connecting piping, this technical solution significantly reduces downtime, simplifies mold replacement procedures, and enables simultaneous operation and replacement, ensuring the press's working efficiency.

[0022] like Figure 3 and Figure 4 As shown, the workbench 1 designed in this technical solution is a rectangular box-shaped structure with a base plate 2 fixed at the bottom. The base plate 2 is connected to the side-shifting mechanism. The upper end of the workbench 1 is provided with multiple T-shaped fixing slots 14 for fixing the mold with the fasteners. Multiple circular holes 10 are evenly spaced between adjacent T-shaped fixing slots 14, arranged in an array. Guide sleeves 13 are installed within the circular holes 10 to guide and support the top column 12. The top column 12 of the lifting mechanism extends from the guide sleeve 13 to lift the mold. Lifting the mold reduces the contact area between the lower end of the mold and the upper end of the workbench 1, allowing the mold to be easily pushed and solving the problem of inaccurate mold positioning and difficulty in fine adjustment during hoisting.

[0023] The specific technical solution of the lifting mechanism in the above scheme includes a rectangular plate 11, which is sleeved inside the worktable 1. Multiple top columns 12 are distributed in a rectangular array and sleeved inside the guide sleeve 13. The lower end of the top column 12 is fixed to the upper end of the rectangular plate 11. A grid-shaped support frame 20 is provided at the lower end of the rectangular plate 11. Two rotating shafts 15 are provided at the lower end of the support frame 20. An eccentric wheel 19 is fixedly connected to the shaft wall of each of the two rotating shafts 15. One side of the eccentric wheel 19 contacts the support frame 20. The shaft wall of the rotating shaft 15 is rotatably connected to the worktable 1 through rolling bearings. Two transmission rods 18 are fixedly connected to the shaft wall of the rotating shaft 15. One end of each of the two transmission rods 18 is rotatably connected to a first double-acting hydraulic cylinder 16 through a pin. The side wall of the first double-acting hydraulic cylinder 16 is rotatably connected to the inner side of the worktable 1 through a hinge seat.

[0024] When the four first bidirectional hydraulic cylinders 16 work simultaneously, they can synchronously pull the transmission rod 18 to swing, which in turn causes the rotating shaft 15 to drive the eccentric wheel 19 to rotate. At this time, the eccentric wheel 19 presses the support frame 20 to make the rectangular plate 11 move upward. When the rectangular plate 11 moves upward, it drives the top column 12 to move upward and pushes the mold upward. In this way, the mold and the worktable 1 can be separated, which makes it easier for technicians to adjust the position of the mold. In addition, a groove is provided at the upper end of the top post 12, and a ball bearing 21 is provided in the groove. A pressure ring 22 is sleeved on the side wall of the ball bearing 21. The inner side of the pressure ring 22 matches the side wall of the ball bearing 21. The pressure ring 22 is fixed to the upper end of the top post 12 by bolts. The ball bearing 21 can effectively reduce the friction between the mold and the upper end of the top post 12, so that the mold can be easily moved and its position adjusted.

[0025] Multiple guide posts 17 are fitted at the four corners of the rectangular plate 11 through guide holes. The upper ends of the multiple guide posts 17 are fixed to the upper inner wall of the workbench plate 1, and the lower ends of the guide posts 17 are fixed to the upper end of the base.

[0026] like Figure 2 As shown, the lateral displacement mechanism designed in this invention includes multiple second bidirectional hydraulic cylinders 9. One end of each second bidirectional hydraulic cylinder 9 is fixed to the upper end of the vehicle body 3. A brake plate 5 is fixedly connected to the output end of the second bidirectional hydraulic cylinder 9. The brake plate 5 is fixed to the lower end of the worktable 1. A guide rail 8 is fixedly connected to the lower end of the worktable 1. A guide groove 7 that is slidably connected to the guide rail 8 is fixedly connected to the upper end of the vehicle body 3. A fixing plate 6 is sleeved on the output shaft of the second bidirectional hydraulic cylinder 9. Two fixing bolts are sleeved on one side of the brake plate 5 through the mounting port. One side of the fixing plate 6 is fixedly connected to the fixing bolts through the threaded hole.

[0027] The second bidirectional hydraulic cylinder 9 can directly push the worktable 1 to move, so that the mold installed on the upper end of the worktable 1 is away from the press. The moving distance is designed to be two-thirds of the width of the worktable 1, which makes it convenient for technicians to use equipment to lift the mold.

[0028] like Figure 6 and Figure 7 As shown, the drive mechanism designed in this invention includes a geared motor 24, which has two main shafts 23 for output power. Both main shafts 23 are rotatably connected to the vehicle body 3 via rolling bearings. One end of each main shaft 23 passes through a rolling bearing and is fixedly connected to a worm gear 31. A worm wheel 30 meshes with one side of the worm gear 31. A half-shaft is fixedly connected to the lower end of the worm wheel 30. The half-shaft is rotatably connected to the side wall of the vehicle body 3 via a needle roller bearing. A gear 29 is fixedly connected to the lower end of the half-shaft. The rack 27 is fixed to one side of the track 4. Two active braking devices are provided on the shaft wall of the main shaft 23. Both active braking devices are installed on the bottom inner wall of the car body 3. Multiple rollers 26 are provided and installed at the four corners of the car body 3. The edge of the roller 26 is provided with a limiting flange that is engaged with the upper end of the track 4. Protective plates are provided at the four corners of the car body 3. The side wall of the car body 3 is rotatably connected to the gear shaft 28 through rolling bearings. The gear shaft 28 meshes with the rack 27.

[0029] The starting reduction motor 24 drives the main shaft 23 to rotate the worm 31. When the worm 31 rotates, it drives the worm wheel 30 to rotate the half shaft. When the half shaft rotates, it drives the gear 29 to roll on the rack 27. In this way, the gear and half shaft can be used to drive the car body 3 to roll on the track 4 in opposite directions. The gear shaft 28 can also help the car body 3 to move stably on the track 4, improving the stability during movement. Furthermore, the self-locking characteristics of the worm wheel 30 and worm 31 can make the car body 3 stop stably on the track 4. like Figure 8 As shown, in order to reduce the force on the reduction motor 24 when parking, the active braking device designed in this technical solution includes a fixed base 34. Each of the four corners of the fixed base 34 is fitted with a pull rod 35 through a through hole. One end of the multiple pull rods 35 is fixedly connected to the first brake block 32, and the other end is fixedly connected to the push plate 25. A second brake block 33 is provided on one side of the first brake block 32. Each of the four corners of the second brake block 33 is fitted with the rod wall of the multiple pull rods 35 through a directional hole. The main shaft 23 is located between the first brake block 32 and the second brake block 33. The side wall of the fixed base 34 is provided with an assembly hole. A brake cylinder 37 is provided in the assembly hole. One end of the brake cylinder 37 is fixedly connected to one side of the push plate 25, and the other end of the brake cylinder 37 is fixedly connected to one side of the second brake block 33. A sleeve 36 is fixedly connected to the shaft wall of the main shaft 23. The opposite sides of the first brake block 32 and the second brake block 33 are provided with grooves that cooperate with the side wall of the sleeve 36.

[0030] When the vehicle body 3 needs to stop, the brake cylinder 37 is activated. When the brake cylinder 37 extends, it pushes the second brake block 33 to move. At the same time, the push plate 25 is forced to drive the pull rod 35 to move the first brake block 32. At this time, the first brake block 32 and the second brake block 33 can move relative to each other and use the groove to clamp the sleeve 36. In this way, the effect of clamping the sleeve 36 can be achieved to achieve the braking effect. When the brake is released, the brake cylinder 37 is controlled to retract and reset.

[0031] It should be noted that the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A moving worktable for an automatic stamping line of a large mechanical press, comprising a car body (3), a track (4), and rollers (26), characterized in that, Also includes: Two worktables (1) are provided. The two worktables (1) can independently install two sets of molds. When changing the mold, the two sets of molds can be switched by moving the vehicle body (3) in the Y-axis direction, which is convenient for technicians to install. A lifting mechanism is provided on the worktable (1). The lifting mechanism uses multiple top columns (12) to push the lower mold out from multiple round holes (10) on the worktable (1) in the Z-axis direction when changing the mold, which is convenient for adjusting the installation position of the lower mold. The side-shifting mechanism is set between the worktable (1) and the vehicle body (3) to realize the movable installation of the worktable (1) and the upper end of the vehicle body (3), so that both worktables (1) can be moved laterally in the X-axis direction to send the replacement mold out below the hydraulic press slider, which is convenient for hoisting the mold on the worktable (1). The drive mechanism uses a gear (29) and a rack (27) meshing transmission. The rack (27) is installed on one side of the track (4) to achieve precise parking by preventing the vehicle body (3) from sliding when the transport mold moves.

2. The moving worktable of the automatic stamping line of the large mechanical press according to claim 1, characterized in that: The worktable (1) is a rectangular box structure with a base plate (2) fixed at the bottom. The base plate (2) is connected to the side-shifting mechanism. The upper end of the worktable (1) is provided with multiple T-shaped fixing grooves (14) for fixing the mold with the fixing parts. Multiple round holes (10) are evenly opened between two adjacent T-shaped fixing grooves (14). The multiple round holes (10) are arranged in an array. A guide sleeve (13) is installed in the round hole (10) to guide and support the top column (12). The top column (12) of the lifting mechanism extends out from the guide sleeve (13) to lift the mold.

3. The moving worktable of the automatic stamping line of the large mechanical press according to claim 2, characterized in that: The lifting mechanism includes a rectangular plate (11) which is fitted inside the worktable (1). Multiple top columns (12) are arranged in a rectangular array and fitted inside the guide sleeve (13). The lower end of each top column (12) is fixed to the upper end of the rectangular plate (11). A grid-shaped support frame (20) is provided at the lower end of the rectangular plate (11). Two rotating shafts (15) are provided at the lower end of the support frame (20). The shaft walls of the two rotating shafts (15) are fixed with... An eccentric wheel (19) is connected to the workbench (1), one side of which is in contact with the support frame (20). The shaft wall of the rotating shaft (15) is rotatably connected to the workbench (1) through a rolling bearing. Two transmission rods (18) are fixedly connected to the shaft wall of the rotating shaft (15). One end of each of the two transmission rods (18) is rotatably connected to a first double-acting hydraulic cylinder (16) through a pin. The side wall of the first double-acting hydraulic cylinder (16) is rotatably connected to the inside of the workbench (1) through a hinge seat.

4. The moving worktable of the automatic stamping line of the large mechanical press according to claim 1, characterized in that: The top post (12) has a groove at its upper end, and a ball (21) is provided in the groove. A pressure ring (22) is sleeved on the side wall of the ball (21). The inner side of the pressure ring (22) matches the side wall of the ball (21). The pressure ring (22) is fixed to the upper end of the top post (12) by bolts.

5. The moving worktable of the automatic stamping line of the large mechanical press according to claim 3, characterized in that: Multiple guide posts (17) are connected to the four corners of the rectangular plate (11) through guide holes. The upper ends of the multiple guide posts (17) are fixed to the upper inner wall of the workbench plate (1), and the lower ends of the guide posts (17) are fixed to the upper end of the base.

6. The moving worktable of the automatic stamping line of the large mechanical press according to claim 1, characterized in that: The lateral shifting mechanism includes multiple second bidirectional hydraulic cylinders (9). One end of each second bidirectional hydraulic cylinder (9) is fixed to the upper end of the vehicle body (3). A brake plate (5) is fixedly connected to the output end of the second bidirectional hydraulic cylinder (9). The brake plate (5) is fixed to the lower end of the worktable (1). A guide rail (8) is fixedly connected to the lower end of the worktable (1). A guide groove (7) that slides with the guide rail (8) is fixedly connected to the upper end of the vehicle body (3). A fixing plate (6) is sleeved on the output shaft of the second bidirectional hydraulic cylinder (9). Two fixing bolts are sleeved on one side of the brake plate (5) through the mounting port. One side of the fixing plate (6) is fixedly connected to the fixing bolts through the threaded hole.

7. The moving worktable of the automatic stamping line of the large mechanical press according to claim 1, characterized in that: The drive mechanism includes a geared motor (24), which has two main shafts (23) for outputting power. Both main shafts (23) are rotatably connected to the car body (3) through rolling bearings. One end of the main shaft (23) passes through the rolling bearing and is fixedly connected to a worm (31). A worm wheel (30) meshes with one side of the worm (31). A half shaft is fixedly connected to the lower end of the worm wheel (30). The half shaft is rotatably connected to the side wall of the car body (3) through a needle roller bearing. A gear (29) is fixedly connected to the lower end of the half shaft. The gear (29) meshes with one side of a rack (27). The rack (27) is fixed to one side of the track (4). Two active braking devices are provided on the shaft wall of the main shaft (23), and both active braking devices are installed on the bottom inner wall of the vehicle body (3).

8. The moving worktable of the automatic stamping line of the large mechanical press according to claim 7, characterized in that: The active braking device includes a fixed base (34), and each of the four corners of the fixed base (34) is fitted with a pull rod (35) through a through hole. One end of each of the pull rods (35) is fixedly connected to the first brake block (32), and the other end is fixedly connected to a push plate (25). A second brake block (33) is provided on one side of the first brake block (32). Each of the four corners of the second brake block (33) is fitted with the rod wall of the pull rods (35) through a directional hole. The main shaft (23) is located between the first brake block (32) and the second brake block (33). The side wall of the fixed seat (34) is provided with an assembly hole, and a brake cylinder (37) is provided in the assembly hole. One end of the brake cylinder (37) is fixedly connected to one side of the push plate (25), and the other end of the brake cylinder (37) is fixedly connected to one side of the second brake block (33).

9. The moving worktable of the automatic stamping line of the large mechanical press according to claim 8, characterized in that: A sleeve (36) is fixedly connected to the shaft wall of the main shaft (23). The first brake block (32) and the second brake block (33) are respectively provided with grooves that cooperate with the side wall of the sleeve (36) on opposite sides.

10. The moving worktable of the automatic stamping line of the large mechanical press according to claim 1, characterized in that: Multiple rollers (26) are provided and installed at the four corners of the vehicle body (3). The edge of the roller (26) is provided with a limiting flange that is engaged with the upper end of the track (4). Protective plates are provided at the four corners of the vehicle body (3). The side wall of the vehicle body (3) is rotatably connected to a gear shaft (28) through a rolling bearing. The gear shaft (28) meshes with a rack (27).

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