High-speed servo press with secondary pressurization

Abstract

This invention relates to a high-speed servo press with secondary pressurization, comprising an upper frame, a lower worktable, side beams, a lifting unit, and a pressurizing unit. A pressurizing unit is located at the center of each of the two sides of the upper surface of the lower worktable. Each pressurizing unit includes an upper hook, a lower hook, a pressurizing cylinder, a hook connecting block, a guide groove, a guide pin, and a guide groove frame. The lifting unit includes a servo motor and a rack and pinion mechanism. The servo motor is mounted at the center of the upper frame. Advantages include lightweight construction, high operating speed (up to 500mm / s), and mold opening and closing in only 3-4 seconds. The lightweight construction reduces energy consumption, resulting in energy savings. The pressurizing unit, mounted on the lower worktable, hooks onto the upper worktable, directly pressurizing it downwards, thus reducing the overall structural strength and weight of the equipment. The use of a servo motor and rack and pinion transmission allows for precise positioning of any position on the upper worktable.

Description

Technical Field

[0001] This invention relates to the field of servo presses, and more specifically to a high-speed servo press with secondary pressurization. Background Technology

[0002] Previously, hydraulic presses were used for punching, laminating, and forming operations on automotive interior parts. Hydraulic presses have high power, enabling efficient punching, laminating, and forming; however, they are large and heavy, slow, and energy-intensive. Currently, using hydraulic presses for some small and medium-sized automotive interior parts results in slow speeds, high energy consumption, and inadequate positioning for processing requirements. While servo presses exist for processing automotive interior parts, their power is insufficient to meet production demands. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a high-speed servo press with secondary pressurization. It features an ingenious design, a reasonable and compact structure, a small overall size, light weight, and high operating speed, meeting the processing and production needs of some small and medium-sized parts in automotive interior components.

[0004] The technical solution of the present invention:

[0005] A high-speed servo press with secondary pressurization includes an upper frame, a lower worktable, side beams, a lifting unit, and a pressurizing unit. One side beam is installed at each of the four corners of the lower worktable, and the upper ends of the four side beams are fixedly connected to the four corners of the upper frame. The lifting unit is installed on the upper frame, and its lower end is fixedly connected to the upper worktable. Each of the four corners of the upper worktable is mounted on the inner side of one of the four side beams via a slider rail structure. A pressurizing unit is located at the middle of each of the two upper sides of the lower worktable. Each pressurizing unit includes an upper hook, a lower hook, a pressurizing cylinder, a hook connecting block, a guide groove, a guide pin, and a guide groove frame. The pressurizing cylinder is installed at the middle of one upper side of the lower worktable, and the guide groove frame is installed on the upper part of the pressurizing cylinder body. A rectangular through groove is designed in the middle of the guide groove frame, and two pairs of... The guide groove is called the upper end of the pressurized cylinder. The telescopic end is connected to the middle of the lower end of the hook connecting block. The two sides of the hook connecting block are respectively rotatably connected to the lower hook. The upper end of the lower hook is equipped with a guide pin. The two ends of the guide pin extend out of the two sides of the lower hook. The upper end of the lower hook is located in the rectangular through groove and the two ends of the guide pin are correspondingly slidably installed in the guide grooves on both sides. The upper end of the upper hook is installed in the middle of one side of the upper worktable. The lower end of the upper hook can extend into the rectangular through groove and the upper hook and the two lower hooks can form a hook-and-hook interlocking structure. The lifting part includes a servo motor and a gear rack mechanism. The servo motor is installed in the middle of the upper frame. The servo motor is driven by the gear reversing mechanism and connected to the middle of the synchronous shaft. The gears of the gear rack mechanism are respectively fixedly connected to the two ends of the synchronous shaft. The lower ends of the racks of the two gear rack mechanisms are respectively connected to the upper part of the upper worktable near the two sides.

[0006] The guide frame includes two support plates and two guide plates. The two guide plates are fixedly connected to each other by a support plate on both sides. A rectangular through groove is formed between the two support plates and the two guide plates. The lower ends of the two support plates extend a certain distance and are installed on both sides of the main body of the pressurized cylinder. The inner sidewall of the guide plate is designed with two symmetrical guide grooves. The two guide grooves on the two guide plates are also designed symmetrically from left to right. The guide groove includes a vertical groove and an inclined groove. An inclined groove is installed at the upper end of the vertical groove and the vertical groove communicates with the inclined groove. The inclined groove is designed to slope outward.

[0007] The upper pull hook includes a vertical plate and a horizontal plate. The upper part of the vertical plate is installed in the middle of one side of the upper frame, and the lower part of the vertical plate is installed with a horizontal plate. The two corners of the lower end of the horizontal plate are set as chamfers. The two lower pull hooks are installed symmetrically. Each lower pull hook includes a vertical plate and a hook. The upper part of the vertical plate is installed with a hook that extends inward. The lower end of the vertical plate is rotatably installed on one side of the pull hook connecting block. The hooks of the lower pull hooks on both sides can hook onto the upper two sides of the horizontal plate to form an interlock.

[0008] A pull hook detection switch is installed on one side of the rectangular through groove of the guide frame.

[0009] The upper worktable is equipped with several clamping devices around its lower perimeter for fixing and holding the upper mold; the lower worktable is also equipped with several clamping devices around its upper perimeter for fixing and holding the lower mold; each clamping device includes a hydraulic cylinder, a clamping body, a clamping ejection spring, a clamping locking pin, a clamping locking pin position detection switch, and a clamping pad. The hydraulic cylinder is installed at the rear end of the clamping body, and a circular slot is designed at the front end of the clamping body. The rear end of the clamping locking pin is slidably installed in the circular slot inside the front end of the clamping body. The telescopic end of the hydraulic cylinder extends into the circular slot of the clamping body and is connected to the clamping locking pin. The clamping ejection spring is installed in the circular slot, with one end of the spring resting on the bottom of the slot and the other end resting on the rear end of the clamping locking pin. The front end of the clamping locking pin is designed with a step that contacts and engages with the clamping pad. The clamping pad is installed on the mold, and the clamping body is installed on the worktable; a clamping locking pin position detection switch is also installed on one side of the clamping body. The clamping pin has a circular groove in the middle of its rear end. The telescopic end of the hydraulic cylinder extends into the circular groove and is connected to the bottom of the groove. The other end of the clamping pin ejection spring rests against the bottom of the circular groove of the clamping pin and is sleeved on the outside of the telescopic rod of the hydraulic cylinder. The clamping body has an axial oblong hole on one side, which connects to the circular slot. A positioning bolt is installed on the outside of the clamping pin. The upper end of the positioning bolt is located inside the oblong hole, and the lower end of the positioning bolt is screwed onto the outside of the clamping pin. A fixing plate is installed at the opening of the oblong hole. There are two clamping pin position detection switches. The two clamping pin position detection switches are installed on the fixing plate, and the lower ends of the two clamping pin position detection switches are located inside the oblong hole and are respectively close to the two ends inside the oblong hole. The circular slot of the clamping body is designed as a through hole. There is a cover plate on the rear side of the circular slot of the clamping body, and the hydraulic cylinder is installed on the cover plate. The hydraulic cylinder is a single-acting hydraulic cylinder. The inner side of the step is designed as an upward sloping surface.

[0010] The upper frame has an upper limit safety positioning part installed on each of its two lower ends. The upper limit safety positioning part includes a safety pin, an upper limit positioning cylinder and a perforated ear plate. The upper limit positioning cylinder is installed in the middle of one side of the lower end of the upper frame. The upper limit positioning cylinder has a safety pin fixedly connected to its inner telescopic rod. The perforated ear plate is installed on one side of the upper worktable. The upper limit positioning cylinder controls the safety pin to be inserted into the hole of the perforated ear plate.

[0011] The gear and rack mechanism also includes a multi-position safety lock, which includes a safety cylinder, a locking tooth, and a U-shaped plate. The safety cylinder is mounted on the rotating mounting base of the gear, and the telescopic end of the safety cylinder is fixedly connected to the bottom plate of the U-shaped plate. The rear end of the locking tooth is rotatably mounted in the middle of the U-shaped plate, and the front teeth of the locking tooth are set to face the teeth of the rack.

[0012] The front end of the locking tooth is designed with two teeth. A rod is designed and installed at the lower end of the locking tooth near the front teeth. A support plate is also designed at the lower end of the support rod to support the support rod. The support plate is installed on the rotating mounting seat of the gear.

[0013] The rear end of the tooth is set with a downward inclined edge, and an inclined block is set on each side of the bottom plate of the U-shaped plate, with one side of the inclined block connected to the inner wall of the U-shaped plate.

[0014] The aforementioned high-speed servo press with secondary pressurization also includes protective plates. A protective plate is installed on each side of the press, covering the upper frame and the lower worktable. Small protective plates are also installed at the front and rear of the upper frame and the lower worktable. A press operation window is left between the small protective plates at the front and rear of the upper frame and the small protective plates at the front and rear of the lower worktable. Safety light curtains are designed on both sides of the press operation window.

[0015] The advantages of this invention are:

[0016] 1. The equipment is lightweight and has a fast operating speed of up to 500mm / s, with mold opening and closing taking only 3-4 seconds; the lightweight structure of the equipment consumes less energy for driving, making the equipment energy-saving; the pressure unit is installed on the lower worktable, hooking onto the upper worktable, and directly applying pressure to the upper worktable downwards, which can reduce the overall structural strength and weight of the equipment.

[0017] 2. It adopts a servo motor and gear rack transmission, which can achieve precise positioning at any position on the upper worktable;

[0018] 3. A multi-position safety lock is installed on the drive rack; it can be locked when the upper worktable stops at any position to ensure equipment safety;

[0019] 4. The equipment is protected by protective panels on the outside, and the equipment has an attractive appearance;

[0020] 5. The press operation window is equipped with a safety light curtain, making operation convenient and safe. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0022] Figure 2 This is the front view of the present invention.

[0023] Figure 3 This is a partially simplified schematic diagram of the present invention.

[0024] Figure 4 yes Figure 3 A partially enlarged schematic diagram of the central pressure section.

[0025] Figure 5This is a simplified diagram of the guide groove plate on one side of the pressurizing part of the present invention, with the upper pull hook inserted into the guide groove frame.

[0026] Figure 6 This is a schematic diagram of the lower hook and upper hook of the pressure part of the present invention after they are engaged (the guide groove is shown in detail in the figure).

[0027] Figure 7 This is a schematic diagram of the multi-position safety lock of the gear and rack mechanism of the present invention (the U-shaped plate side in the figure is simplified).

[0028] Figure 8 This is a three-dimensional schematic diagram of the multi-position safety lock of the gear and rack mechanism of the present invention.

[0029] Figure 9 This is a three-dimensional schematic diagram of the clamping device of the present invention.

[0030] Figure 10 This is a cross-sectional schematic diagram of the clamping state of the clamping device of the present invention.

[0031] Figure 11 This is a cross-sectional schematic diagram of the mold clamping device of the present invention in the mold-opening state.

[0032] Figure 12 This is a schematic diagram showing the state of the clamping device after the fixing plate is omitted in this invention.

[0033] Figure 13 This is a schematic diagram of the mounting plate and safety light curtain of the present invention.

[0034] Figure 14 This is a schematic diagram of the hydraulic system used in the clamping device of the present invention. Implementation

[0035] See attached document Figure 1-14A high-speed servo press with secondary pressurization includes an upper frame 1, a lower worktable 2, side beams 3, an upper worktable 4, a lifting unit 5, and a pressurizing unit 6. One side beam 3 is installed at each of the four corners of the lower worktable 2, and the upper ends of the four side beams 3 are fixedly connected to the four corners of the upper frame 1. The lifting unit 5 is installed on the upper frame 1, and its lower end is fixedly connected to the upper worktable 4. The four corners of the upper worktable 4 are respectively mounted on the inner sides of the four side beams 3 via a slider rail structure. A pressurizing unit 6 is located at the middle of each of the two upper sides of the lower worktable 2. The pressurizing unit 6 includes an upper hook 61, a lower hook 62, a pressurizing cylinder 63, a hook connecting block 64, a guide groove 65, a guide pin 66, and a guide groove frame 68. The pressurizing cylinder 63 is installed at the middle of one side of the lower worktable 2, and the guide groove frame 68 is installed on the upper part of the main body of the pressurizing cylinder 63. A rectangular through groove is designed in the middle of the guide groove frame 68, and two symmetrical guides are respectively arranged on the two inner side walls of the rectangular through groove. The upper end of the pressurizing cylinder 63 is connected to the middle of the lower end of the hook connecting block 64. The two sides of the hook connecting block 64 are respectively rotatably connected to the lower hook 62. The upper end of the lower hook 62 is equipped with a guide pin 66. The two ends of the guide pin 66 extend out of the two sides of the lower hook 62. The upper end of the lower hook 62 is located in the rectangular through groove, and the two ends of the guide pin 66 are correspondingly slidably installed in the guide grooves 65 on both sides. The upper end of the upper hook 61 is installed in the middle of one side of the upper worktable 4. The lower end of the upper hook 61 can extend into the rectangular through groove, and the upper hook 61 and the two lower hooks 62 can form a hook-and-hook interlocking structure. The lifting part 5 includes a servo motor 51 and a gear rack mechanism 52. The servo motor 51 is installed in the middle of the upper frame 1. The servo motor 51 is driven and connected to the middle of the synchronous shaft 53 through the gear reversing mechanism. The gears of the gear rack mechanism 52 are respectively fixedly connected to the two ends of the synchronous shaft 53. The lower ends of the racks of the two gear rack mechanisms 52 are respectively connected to the upper end of the upper worktable 4 near the two sides. The gear and rack mechanism is existing technology, and this invention will be briefly described.

[0036] The guide frame 68 includes two support plates 681 and two guide plates 682. The two guide plates 682 are fixedly connected to each other via a support plate 681 on both sides. A rectangular through-slot is formed between the two support plates 681 and the two guide plates 682. The lower ends of the two support plates 681 extend a certain distance and are installed on both sides of the main body of the pressurizing cylinder 63. Two symmetrical guide grooves 65 are designed on the inner sidewall of the guide plates 682, and the two guide grooves 65 on the two guide plates 682 are also symmetrically designed from left to right. Each guide groove 65 includes a vertical groove 651 and an inclined groove 652. The inclined groove 652 is installed at the upper end of the vertical groove 651 and communicates with it. The inclined groove 652 is designed to slope outwards. The guide groove route is designed to guide the guide pin at the upper end of the pull-down hook, so that the up-and-down movement of the two pull-down hooks achieves the opening and closing actions.

[0037] The upper pull hook 61 includes a vertical plate 611 and a horizontal plate 612. The upper end of the vertical plate 611 is installed in the middle of one side of the upper frame 1, and the lower end of the vertical plate 611 is installed with the horizontal plate 612. The two corners at the lower end of the horizontal plate 612 are set as chamfers 613. The two lower pull hooks 62 are installed symmetrically. Each lower pull hook 62 includes a vertical plate 621 and a hook 622. The upper end of the vertical plate 621 is installed with a hook 622 extending inward. The lower end of the vertical plate 621 is rotatably installed on one side of the pull hook connecting block 64. The hooks 622 of the lower pull hooks 62 on both sides can hook onto the upper two sides of the horizontal plate 612 to form an interlock.

[0038] A pull-up hook detection switch 69 is installed on one side of the rectangular through slot of the guide frame 68. The pull-up hook detection switch 69 is designed to meet the needs of automated control operation. Normally, the pressurizing cylinder pushes the pull-down hook upwards, and the two pull-down hooks open to both sides under the action of the guide slot, so that the pull-up hook can descend safely. Once the pull-up hook has descended to the correct position, the pull-up hook detection switch detects that the pull-up hook is located in the rectangular through slot of the guide frame, indicating that the pressurizing cylinder can pull down. At this time, pulling down allows the pull-down hook to hook onto the two sides of the horizontal plate of the pull-up hook through the hook. If the pressurizing cylinder continues to pull down, the upper worktable will continue to press down, completing the workpiece processing operation.

[0039] The upper worktable 4 is equipped with several clamping devices 7 around its lower perimeter for fixing and holding the upper mold; the lower worktable 2 is also equipped with several clamping devices 7 around its upper perimeter for fixing and holding the lower mold; each clamping device 7 includes a hydraulic cylinder 71, a clamping body 72, a clamping ejection spring 73, a clamping locking pin 74, a clamping locking pin position detection switch 75, and a clamping pad 76. The hydraulic cylinder 71 is installed at the rear end of the clamping body 72, and a circular slot 77 is designed at the front end of the clamping body 72. The rear end of the clamping locking pin 74 is slidably installed in the circular slot 77 inside the front end of the clamping body 72. The telescopic end at the front end extends into the circular slot 77 of the clamping mold body 72 and is connected to the clamping mold locking pin 74. The clamping mold ejection spring 73 is installed in the circular slot 77, with one end of the spring resting on the bottom of the slot 77 and the other end resting on the rear end of the clamping mold locking pin 74. The front end of the clamping mold locking pin 74 is designed with a step 78 that contacts and engages with the clamping mold pad 76. The clamping mold pad 76 is installed on the mold, and the clamping mold body 72 is installed on the worktable. A clamping mold locking pin position detection switch 75 is also installed on one side of the clamping mold body 72. The inner side of the step 78 is designed as an upward sloping surface, which facilitates the downward pressure of the clamping mold pad. The clamping pin 74 has a circular groove in the middle of its rear end. The telescopic end of the hydraulic cylinder 71 extends into the circular groove and is connected to the bottom of the groove. The other end of the clamping ejection spring 73 rests against the bottom of the circular groove of the clamping pin 74, and the clamping ejection spring 73 is sleeved on the outside of the telescopic rod of the hydraulic cylinder 71. The clamping body 72 has an axial oblong hole 79 on one side, which connects to the circular slot 77. A positioning bolt 710 is installed on the outside of the clamping pin 74. The upper end of the positioning bolt 710 is located inside the oblong hole 79, and the lower end of the positioning bolt 710 is screwed onto the outside of the clamping pin 74. A fixing plate 711 is installed at the opening of the oblong hole 79. Two clamping pin position detection switches 75 are designed. The two clamping pin position detection switches 75 are installed on the fixing plate 711, and the lower ends of the two clamping pin position detection switches 75 are located inside the oblong hole 79 and are respectively close to the two ends inside the oblong hole 79. The circular slot 77 of the clamping mold body 72 is designed as a through hole, and a cover plate 712 is located behind the circular slot 77 of the clamping mold body 72. The hydraulic cylinder 71 is mounted on the cover plate 712. A circular hole may be opened in the middle of the cover plate, so that one end of the clamping mold ejection spring 73 passes through the circular hole and rests on the end of the hydraulic cylinder. The hydraulic cylinder 71 is a single-acting hydraulic cylinder 71.In use, the clamping mold body 72 is designed as a rectangular shape with a countersunk hole 713 at each of its four corners. The clamping mold body 72 is fixed to the upper and lower worktables by bolts through the countersunk holes 713. The clamping mold pad 76 is installed on the mold. Before the mold is installed, the single-acting hydraulic cylinder 71 is activated to overcome the elastic force of the clamping mold ejection spring 73 and control the clamping mold locking pin 74 to retract into the circular slot 77 of the clamping mold body 72. At the same time, the mold locking pin position detection switch can detect whether it has retracted into place and transmit the signal to the controller. Once detected, the controller will take action. If the mold is not fully contracted, it cannot be installed. Once fully contracted, the mold can be installed on the worktable. The hydraulic cylinder 71 stops working, and the mold ejection spring 73 pushes out the mold clamping pin 74. The front end of the mold clamping pin 74 presses against the mold clamping pad 76 via the step 78, securing the mold. Simultaneously, the mold clamping pin position detection switch can detect whether it has fully extended, precisely controlling the switch state. During mold clamping, the hydraulic cylinder 71 does not work, and the entire hydraulic system does not work, preventing leakage or pipe bursting issues over time, ensuring safety and reliability. Figure 14 In the hydraulic system, oil is supplied by an oil pump and then by two two-position three-way valves to supply oil to the single-acting cylinders of several clamping devices of the upper and lower molds, achieving synchronous oil supply. Each clamping device detects the relative position of the positioning bolts 710 through two clamping pin position detection switches 75, and sends a signal to the controller to indicate whether the switch is in position. The controller is electrically connected to the oil pump, the two-position three-way valves, and the clamping pin position detection switches, ensuring precise control and reliable safety.

[0040] The upper frame 1 has an upper limit safety positioning part 8 installed on each of its lower ends. Each upper limit safety positioning part 8 includes a safety pin 81, an upper limit positioning cylinder 82, and a perforated ear plate 83. The upper limit positioning cylinder 82 is installed at the middle position on one side of the lower end of the upper frame 1. The safety pin 81 is fixedly connected to the telescopic rod inside the upper limit positioning cylinder 82. The perforated ear plate 83 is installed on one side of the upper worktable 4. The upper limit positioning cylinder 82 controls the safety pin 81 to insert into the hole of the perforated ear plate 83. The upper limit safety positioning part is designed to effectively position and lock the upper worktable when it reaches its highest position, preventing it from sliding down.

[0041] The gear and rack mechanism 52 also includes a multi-position safety lock 9, which comprises a safety cylinder 91, a locking tooth 92, and a U-shaped plate 93. The safety cylinder 91 is mounted on the rotating mounting base 54 of the gear, and its telescopic end is fixedly connected to the base plate of the U-shaped plate 93. The rear end of the locking tooth 92 is rotatably mounted in the middle of the U-shaped plate 93, with its front teeth facing the teeth of the rack. The multi-position safety lock design effectively locks the rack after the upper worktable stops lifting, ensuring safety and reliability.

[0042] The locking tooth 92 has two teeth at its front end. A support rod 96 is mounted near the front teeth at the lower end of the locking tooth 92. A support plate 97 is also designed at the lower end of the support rod 96 to support it. The support plate 97 is mounted on the rotating mounting seat 54 of the gear. The teeth of the locking tooth can effectively insert horizontally into the teeth of the rack and are strongly supported by the support rod. The connection between the rear end of the locking tooth and the safety cylinder is reduced, preventing damage to the safety cylinder.

[0043] The rear end of the locking tooth 92 is provided with a downwardly inclined edge 94, and an inclined block 95 is provided on each side of the bottom plate of the U-shaped plate 93, with one side of the inclined block 95 connected to the inner wall of the U-shaped plate 93. When the locking tooth is retracted under the control of the safety cylinder, the inclined block provides a safety limit to the inclined edge of the locking tooth.

[0044] The aforementioned high-speed servo press with secondary pressurization also includes protective plates 10. One protective plate 10 is installed on each side of the press, covering the upper frame 1 and the lower worktable 2 on both sides. Small protective plates 12 are also installed at the front and rear of the upper frame 1 and the lower worktable 2. A press operation window is provided between the small protective plates 12 at the front and rear of the upper frame 1 and the small protective plates 12 at the front and rear of the lower worktable 2. Safety light curtains 11 are designed on both sides of the press operation window. The protective plates and safety light curtains improve the safety level of the equipment.

[0045] In use, this invention uses a clamping device to quickly fix the upper and lower molds onto the upper and lower worktables, respectively. A servo motor drives a synchronous shaft via a gear reversing mechanism, causing the gears of the rack and pinion mechanisms on both sides to rotate. The rotating gears engage the racks, simultaneously causing the racks on both sides to rise and fall. The lower end of the racks is connected to the upper worktable, allowing for rapid raising and lowering of the upper worktable. The height of the upper worktable is precisely positioned according to actual operation. After rapid positioning, the racks can be locked with multi-position safety locks for safety and reliability. During mold closing, the servo motor of this invention drives the upper worktable to press down. While the servo motor controls the raising and lowering, it has a fast response but low force, which cannot meet the processing requirements for punching, compounding, and molding small and medium-sized parts in automotive interior components. This invention addresses this by using a pressure unit to apply pressure to the upper worktable... The lower mold undergoes secondary pressurization. The pressurizing unit is installed on both sides of the upper and lower worktables. The pressurizing cylinder controls the lower hook to hook onto the upper hook. Then, the pressurizing cylinder retracts, connecting the pressurizing cylinder, the lower hook, and the lower worktable. The upper hook is then fixed to the upper worktable. In this way, the upper worktable, under the continued downward pull of the pressurizing cylinder, increases the direct mold closing pressure between the upper and lower molds, ensuring that the product is processed in place. Moreover, during the pressurization process, no additional reaction force is generated on the side beams. The four side beams only need to meet the strength requirements of supporting the servo motor to control the lifting and pressing of the upper worktable. Thus, the side beams do not need to be designed to be large, reducing the overall frame weight. The pressurizing unit design of this invention not only increases the pressure of the servo press to meet the rapid processing and production of small automotive interior parts, but also reduces the stress on the side beams, thereby reducing the volume and weight of the side beams.

Claims

1. A high-speed servo press with secondary pressurization, characterized in that, It includes an upper frame, a lower worktable, side beams, a lifting mechanism, and a pressurizing mechanism. A side beam is installed at each of the four corners of the lower worktable, and the upper ends of the four side beams are fixedly connected to the four corners of the upper frame. The lifting mechanism is installed on the upper frame, and its lower end is fixedly connected to the upper worktable. A slider rail structure is installed at each of the four corners of the upper worktable on the inner side of the four side beams. A pressurizing mechanism is located at the middle of each of the two upper sides of the lower worktable. The pressurizing mechanism includes an upper hook, a lower hook, a pressurizing cylinder, a hook connecting block, a guide groove, a guide pin, and a guide groove frame. The pressurizing cylinder is installed at the middle of one upper side of the lower worktable, and the guide groove frame is installed on the upper part of the pressurizing cylinder body. A rectangular through groove is designed in the middle of the guide groove frame, and two symmetrical guide grooves are respectively provided on the two inner side walls of the rectangular through groove. The telescopic end of the upper end of the pressurizing cylinder is connected to the middle of the lower end of the hook connecting block. The two sides of the hook connecting block are respectively rotatably connected to the lower hooks. The upper end of the lower hook is equipped with a guide pin, and the two ends of the guide pin extend out of the two sides of the lower hook. The upper end of the lower hook is located in the rectangular through groove, and the two ends of the guide pin are correspondingly slidably installed in the guide grooves on both sides. The upper end of the upper hook is installed in the middle of one side of the upper worktable. The lower end of the upper hook can extend into the rectangular through groove, and the upper hook and the two lower hooks can form a hook-and-hook interlocking structure. The lifting part includes a servo motor and a gear rack mechanism. The servo motor is installed in the middle of the upper frame. The servo motor is driven by the gear reversing mechanism and connected to the middle of the synchronous shaft. The gears of the gear rack mechanism are respectively fixedly connected to the two ends of the synchronous shaft. The lower ends of the racks of the two gear rack mechanisms are respectively connected to the upper part of the upper worktable near the two sides.

2. The high-speed servo press with secondary pressurization according to claim 1, characterized in that, The guide frame includes two support plates and two guide plates. The two guide plates are fixedly connected to each other by a support plate on both sides. A rectangular through groove is formed between the two support plates and the two guide plates. The lower ends of the two support plates extend a certain distance and are installed on both sides of the main body of the pressurized cylinder. The inner sidewall of the guide plate is designed with two symmetrical guide grooves. The two guide grooves on the two guide plates are also designed symmetrically from left to right. The guide groove includes a vertical groove and an inclined groove. An inclined groove is installed at the upper end of the vertical groove and the vertical groove communicates with the inclined groove. The inclined groove is designed to slope outward.

3. The high-speed servo press with secondary pressurization according to claim 1, characterized in that, The upper pull hook includes a vertical plate and a horizontal plate. The upper part of the vertical plate is installed in the middle of one side of the upper frame, and the lower part of the vertical plate is installed with a horizontal plate. The two corners of the lower end of the horizontal plate are set as chamfers. The two lower pull hooks are installed symmetrically. Each lower pull hook includes a vertical plate and a hook. The upper part of the vertical plate is installed with a hook that extends inward. The lower end of the vertical plate is rotatably installed on one side of the pull hook connecting block. The hooks of the lower pull hooks on both sides can hook onto the upper two sides of the horizontal plate to form an interlock.

4. The high-speed servo press with secondary pressurization according to claim 1, characterized in that, A pull hook detection switch is installed on one side of the rectangular through groove of the guide frame.

5. The high-speed servo press with secondary pressurization according to claim 1, characterized in that, The upper worktable is equipped with several clamping devices around its lower perimeter for fixing and holding the upper mold; the lower worktable is also equipped with several clamping devices around its upper perimeter for fixing and holding the lower mold; each clamping device includes a hydraulic cylinder, a clamping body, a clamping ejection spring, a clamping locking pin, a clamping locking pin position detection switch, and a clamping pad. The hydraulic cylinder is installed at the rear end of the clamping body, and a circular slot is designed at the front end of the clamping body. The rear end of the clamping locking pin is slidably installed in the circular slot inside the front end of the clamping body. The telescopic end of the hydraulic cylinder extends into the circular slot of the clamping body and is connected to the clamping locking pin. The clamping ejection spring is installed in the circular slot, with one end of the spring resting on the bottom of the slot and the other end resting on the rear end of the clamping locking pin. The front end of the clamping locking pin is designed with a step that contacts and engages with the clamping pad. The clamping pad is installed on the mold, and the clamping body is installed on the worktable; a clamping locking pin position detection switch is also installed on one side of the clamping body. The clamping pin has a circular groove in the middle of its rear end. The telescopic end of the hydraulic cylinder extends into the circular groove and is connected to the bottom of the groove. The other end of the clamping pin ejection spring rests against the bottom of the circular groove of the clamping pin and is sleeved on the outside of the telescopic rod of the hydraulic cylinder. The clamping body has an axial oblong hole on one side, which connects to the circular slot. A positioning bolt is installed on the outside of the clamping pin. The upper end of the positioning bolt is located inside the oblong hole, and the lower end of the positioning bolt is screwed onto the outside of the clamping pin. A fixing plate is installed at the opening of the oblong hole. There are two clamping pin position detection switches. The two clamping pin position detection switches are installed on the fixing plate, and the lower ends of the two clamping pin position detection switches are located inside the oblong hole and are respectively close to the two ends inside the oblong hole. The circular slot of the clamping body is designed as a through hole. A cover plate is placed on the rear side of the circular slot of the clamping body, and the hydraulic cylinder is installed on the cover plate. The hydraulic cylinder is a single-acting hydraulic cylinder. The inner side of the step is designed as an upward sloping surface.

6. The high-speed servo press with secondary pressurization according to claim 1, characterized in that, The upper frame has an upper limit safety positioning part installed on each of its two lower ends. The upper limit safety positioning part includes a safety pin, an upper limit positioning cylinder and a perforated ear plate. The upper limit positioning cylinder is installed in the middle of one side of the lower end of the upper frame. The upper limit positioning cylinder has a safety pin fixedly connected to its inner telescopic rod. The perforated ear plate is installed on one side of the upper worktable. The upper limit positioning cylinder controls the safety pin to be inserted into the hole of the perforated ear plate.

7. The high-speed servo press with secondary pressurization according to claim 1, characterized in that, The gear and rack mechanism also includes a multi-position safety lock, which includes a safety cylinder, a locking tooth, and a U-shaped plate. The safety cylinder is mounted on the rotating mounting base of the gear, and the telescopic end of the safety cylinder is fixedly connected to the bottom plate of the U-shaped plate. The rear end of the locking tooth is rotatably mounted in the middle of the U-shaped plate, and the front teeth of the locking tooth are set to face the teeth of the rack.

8. The high-speed servo press with secondary pressurization according to claim 7, characterized in that, The front end of the locking tooth is designed with two teeth. A rod is designed and installed at the lower end of the locking tooth near the front teeth. A support plate is also designed at the lower end of the support rod to support the support rod. The support plate is installed on the rotating mounting seat of the gear.

9. The high-speed servo press with secondary pressurization according to claim 7, characterized in that, The rear end of the tooth is set with a downward inclined edge, and an inclined block is set on each side of the bottom plate of the U-shaped plate, with one side of the inclined block connected to the inner wall of the U-shaped plate.

10. The high-speed servo press with secondary pressurization according to claim 1, characterized in that, The aforementioned high-speed servo press with secondary pressurization also includes protective plates. A protective plate is installed on each side of the press, covering the upper frame and the lower worktable. Small protective plates are also installed at the front and rear of the upper frame and the lower worktable. A press operation window is left between the small protective plates at the front and rear of the upper frame and the small protective plates at the front and rear of the lower worktable. Safety light curtains are designed on both sides of the press operation window.

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