Fixing frame for special-shaped die of punch press

Abstract

The present application belongs to the technical field of punch press, and discloses a special-shaped die fixing frame of punch press, which comprises a punch press body, an upper die holder and a lower die holder, the upper die holder is fixedly connected to the punch head of the punch press body, the bottom of the upper die holder is provided with two opposite first die clamping mechanisms, the upper die holder is connected with an upper die through the two first die clamping mechanisms, the two sides of the lower die holder are provided with second die clamping mechanisms, and the lower die holder is installed with a lower die through the two second die clamping mechanisms. The present application can make two lower die holders unload and feed respectively, specifically, the punch head of the punch press body drives the upper die holder to descend, the lower die and the upper die are combined, then the first die clamping mechanism releases the clamping of the upper die and moves away from the upper die holder, the upper die normally falls on the lower die, then the second die clamping mechanism releases the clamping of the lower die and moves away, and finally the third die clamping mechanism releases the clamping of the front lower die holder.

Description

Technical Field

[0001] This invention belongs to the field of stamping machine tool technology, specifically a special-shaped mold fixing bracket for stamping machine tools. Background Technology

[0002] Forging is a processing method that uses forging machinery to apply pressure to metal billets, causing them to undergo plastic deformation to obtain forgings with certain mechanical properties, shapes, and dimensions. It is one of the two major components of forging (forging and stamping). Forging can eliminate defects such as casting porosity generated during the smelting process, optimize the microstructure, and because it preserves the complete metal flow lines, the mechanical properties of forgings are generally superior to those of castings made of the same material.

[0003] A search revealed, for example, that application CN220406960U provides a forging device for joint blank parts. Its structure includes a vertical forming frame, a forging slot in the middle of the vertical forming frame, a forging platform on the bottom surface of the forging slot, and a forging head on the top of the forging slot. A detection structure is installed on the forging structure of the vertical forming device for joint blank parts. Workers can periodically rotate the positioning frame out of the storage slot. Under normal conditions, the infrared light emitted by the infrared sensor is blocked by one side of the forging plate, and the infrared sensor cannot detect the infrared light. However, when the forging plate is worn to the point of affecting the forging operation, the infrared light emitted by the infrared sensor passes through the bottom surface of the forging plate and is detected by the infrared sensor. A warning light connected to the infrared sensor illuminates, indicating that the forging plate needs to be replaced or repaired, effectively ensuring the normal operating condition of the forging plate. Based on the aforementioned existing technologies, in actual production processes, due to the wide variety of product types and models, it is necessary to change molds to change the products produced. Traditional equipment does not pre-load spare molds, and stamping dies are generally quite heavy. Furthermore, the method of replacing the entire mold results in prolonged machine downtime during mold changes, making it difficult to quickly perform stamping operations. Simultaneously, the manual labor required for mold handling and alignment is significant, thus reducing mold-changing efficiency and stamping efficiency. Therefore, a special-shaped mold fixing bracket for stamping machines is proposed to solve the problems mentioned in the background technology. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides a special-shaped mold fixing bracket for stamping machines.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a special-shaped mold fixing frame for a stamping machine tool, comprising a stamping machine tool body, an upper mold base, and a lower mold base. The upper mold base is fixedly connected to the stamping head of the stamping machine tool body. Two opposing first mold clamping mechanisms are provided at the bottom of the upper mold base, and an upper mold is connected to the upper mold base through the two first mold clamping mechanisms. Second mold clamping mechanisms are provided on both sides of the lower mold base, and a lower mold is installed on the lower mold base through the two second mold clamping mechanisms. Third mold clamping mechanisms are provided on both sides of the stamping machine tool body, and the lower mold base is fixed to the stamping platform of the stamping machine tool body through the two third mold clamping mechanisms. A pre-set cavity is opened in the middle of the stamping machine tool body, and mold shifting mechanisms are provided on both sides of the pre-set cavity. A mold feeding mechanism is provided on the front and rear sides of the stamping machine tool body.

[0006] Preferably, the first clamping mechanism includes two first sliding grooves and two first clamping devices. The two first sliding grooves are both opened on the side of the upper mold base, and the two first clamping devices slide in the two first sliding grooves respectively. The side of the upper mold is clamped to the bottom of the upper mold base by the clamping ends of the two first clamping devices. A first connecting rod is fixedly connected between the two first clamping devices, and a handle is fixedly connected to the middle of the first connecting rod.

[0007] Preferably, the second clamping mechanism includes two second slides and two second clamping devices. The two second slides are both opened on the side of the lower die base, and the two second clamping devices slide in the two second slides respectively. The side of the lower die is clamped on the lower die base by the clamping ends of the two second clamping devices. A second connecting rod is fixed between the two second clamping devices, and the stamping machine body is provided with a transmission mechanism for driving the displacement of the second connecting rod.

[0008] Preferably, the transmission mechanism includes a first mounting frame, which is fixedly connected to the body of the stamping machine tool and located on one side of the lower die base. A movable seat is slidably disposed through the first mounting frame, one end of the movable seat is connected to a second connecting rod, a second mounting frame is fixedly connected to the back of the first mounting frame, a motor is mounted on the second mounting frame, a gear is fixedly connected to the output end of the motor, and a toothed groove is formed on the movable seat, with the gear meshing with the toothed groove.

[0009] Preferably, the third clamping mechanism includes two third slides and two third clamping devices. The two third slides are both opened on the side of the stamping machine body, and the third slides are staggered with the second slides. The two third clamping devices slide in the two third slides respectively, and the two third clamping devices are located on both sides of the first mounting frame. The side of the lower die base is clamped on the stamping machine body by the clamping ends of the two third clamping devices.

[0010] Preferably, the mold moving mechanism includes a roller guide rail and a mounting base. The roller guide rail is mounted on the body of the stamping machine tool. The bottom of the lower mold base is slidably sleeved on the roller guide rail via a slider. The mounting base is fixedly connected to the inner wall of the preset cavity. A first hydraulic cylinder is installed in the middle of the mounting base. A push plate is fixedly connected to the telescopic end of the first hydraulic cylinder. One end of the push plate is fixedly connected to a top mold shaft. Both ends of the top mold shaft are provided with push block assemblies for pushing the lower mold base to move.

[0011] Preferably, the push block assembly includes a top mold base, which is fixedly connected to one end of the top mold shaft. The bottom of the top mold base is provided with a mounting groove, and a top module is hinged to the inner wall of the mounting groove. The side of the top module away from the lower mold base is inclined, and the end of the top module near the lower mold base corresponds to the back of the lower mold base.

[0012] Preferably, a sliding block is fixedly connected to the right end surface of the top mold shaft, and a first sliding groove is provided on the surface of the mounting base, with the sliding block slidably disposed in the first sliding groove.

[0013] Preferably, the die feeding mechanism includes a second hydraulic cylinder and two die feeding arms. The second hydraulic cylinder is installed inside the bottom surface of the stamping machine body. One end of each of the two die feeding arms is hinged to the surface of the stamping machine body. An installation sleeve is fixedly connected to the telescopic end of the second hydraulic cylinder. A movable shaft passes through the middle of the installation sleeve. Movable plates are sleeved at both ends of the movable shaft. A fixed shaft is fixedly connected between the two die feeding arms. The top ends of the two movable plates are sleeved on the surface of the fixed shaft. A connecting plate is hinged to the end of each die feeding arm away from the stamping machine body. An extension arm is hinged to the other end of each connecting plate. Die feeding rollers are rotatably arranged at equal intervals on the inner wall of each extension arm and die feeding roller. The bottom surface of the lower die base is concave upward to form a concave surface, and the concave surface at the bottom of the lower die base is adapted to the die feeding rollers. A positioning mechanism for limiting the swing of the extension arm is provided between the two die feeding arms.

[0014] Preferably, the positioning mechanism includes a fixed plate, which is fixedly connected between two mold feeding arms. Side plates are fixedly connected to the side of the two extension arms near the connecting plate. Positioning holes are opened in the middle of the two side plates. An electric telescopic rod is installed in the middle of the fixed plate. A movable plate is fixedly connected to the telescopic end of the electric telescopic rod. Positioning rods are fixedly connected to both ends of the movable plate, and the positioning rods are adapted to the positioning holes. One end of each of the two positioning rods slides through to one side of the fixed plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the coordinated arrangement of a stamping machine body, an upper die holder, a lower die holder, a first clamping mechanism, an upper die, a lower die, a second clamping mechanism, a third clamping mechanism, a preset cavity, a die-shifting mechanism, and a die-feeding mechanism, features two lower die holders. These two lower die holders are used for unloading and feeding material respectively. Specifically, the stamping head of the stamping machine body drives the upper die holder to descend, causing the lower die to merge with the upper die. Then, the first clamping mechanism releases its grip on the upper die and moves it away from the upper die holder, allowing the upper die to fall normally onto the lower die. Next, the second clamping mechanism releases its grip on the lower die and moves it away. Finally, the third clamping mechanism releases its grip on the lower die holder. At this point, both lower die holders are moved by the die-shifting mechanism. The mechanism is pushed and moved. When the lower die holder is pushed and moved, the lower die and the upper die move together until the lower die holder is moved onto the die feeding mechanism. Finally, the lower die holder, the lower die, and the upper die are removed together. At this time, the lower die holder, carrying the new lower die and the upper die, moves to the bottom of the upper die holder, and the die moving mechanism is reset. Then, the first, second, and third die clamping mechanisms are used to clamp and fix the upper die, the lower die, and the lower die holder respectively. This completes the rapid die change, effectively reducing the workload of personnel, requiring less manual operation, improving die change efficiency, effectively reducing downtime during die change, and also improving the stamping efficiency of the workpiece. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the rear view structure of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention from a bottom view; Figure 4 This is a partial cross-sectional view of the pre-set cavity in this invention; Figure 5 This is a partial structural schematic diagram of the mold feeding mechanism of the present invention; Figure 6 This is a schematic diagram showing the connection between the second clamping mechanism and the transmission mechanism of the present invention; Figure 7 This is a schematic diagram of the structure of the lower mold base of the present invention; Figure 8 This is a schematic diagram of the mold-shifting mechanism of the present invention; Figure 9 For the present invention Figure 8 A partial sectional view; Figure 10 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A; Figure 11 For the present invention Figure 3 Enlarged schematic diagram of the structure at point B.

[0017] In the diagram: 1. Press machine body; 2. Upper die holder; 3. Handle; 4. Lower die holder; 5. Lower die; 6. Upper die; 7. First mounting bracket; 8. Movable plate; 9. Moving shaft; 10. Connecting plate; 11. Fixed plate; 12. Positioning rod; 13. Electric telescopic rod; 14. Die feeding arm; 15. Extension arm; 16. Side plate; 17. Positioning hole; 18. Die feeding roller; 19. Movable plate; 20. Fixed shaft; 21. Mounting sleeve; 22. First hydraulic cylinder; 23. Mounting base; 24. 25. Sliding block; 26. Top mold shaft; 27. Top mold base; 28. Roller guide rail; 29. ​​Second mounting bracket; 30. Third mold clamp; 31. Second hydraulic cylinder; 32. Tooth groove; 33. Third slide groove; 34. Motor; 35. Gear; 36. Moving seat; 37. Second mold clamp; 38. Second connecting rod; 39. Top module; 40. Push plate; 41. First mold clamp; 42. First connecting rod; 43. Pre-set cavity; 44. Mounting groove; 45. First slide groove. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 11 As shown, the present invention provides a special-shaped mold fixing frame for a stamping machine tool, including a stamping machine tool body 1, an upper mold base 2, and a lower mold base 4. The upper mold base 2 is fixedly connected to the stamping head of the stamping machine tool body 1. Two opposing first mold clamping mechanisms are provided at the bottom of the upper mold base 2. An upper mold 6 is connected to the upper mold base 2 through the two first mold clamping mechanisms. A second mold clamping mechanism is provided on both sides of the lower mold base 4. A lower mold 5 is installed on the lower mold base 4 through the two second mold clamping mechanisms. A third mold clamping mechanism is provided on both sides of the stamping machine tool body 1, and the lower mold base 4 is fixed to the stamping platform of the stamping machine tool body 1 through the two third mold clamping mechanisms. A preset cavity 43 is opened in the middle of the stamping machine tool body 1. A mold moving mechanism is provided on both sides of the preset cavity 43. A mold feeding mechanism is provided on the front and rear sides of the stamping machine tool body 1.

[0020] Using the above scheme: the upper die holder 2 will not move arbitrarily on the stamping head of the stamping machine body 1, and the lower die holder 4 can move on the stamping machine body 1. Therefore, the replacement of the lower die 5 and the upper die 6 is carried out on the lower die holder 4. When the lower die 5 and the upper die 6 need to be replaced, firstly, the stamping head of the stamping machine body 1 drives the upper die holder 2 to descend, so that the lower die 5 and the upper die 6 merge. Then, the first clamping mechanism releases the clamping of the upper die 6 and moves it away from the upper die holder 2, so that the upper die 6 falls normally on the lower die 5. Next, the second clamping mechanism releases the clamping of the lower die 5 and moves it away. Finally, the third clamping mechanism releases the clamping of the lower die holder 4. At this time, the lower die holder 4 is pushed and moved by the die shifting mechanism. When the lower die holder 4 is pushed and moved, the lower die 5 and the upper die 6 are still on the lower die holder 4 and move together until the lower die holder 4 is completely moved. After moving to the die feeding mechanism, the lower die holder 4 continues to move on the die feeding mechanism. Finally, the lower die holder 4, lower die 5, and upper die 6 are removed together. When the new lower die 5 and upper die 6 are being fed, the new lower die 5 and upper die 6 are placed on another lower die holder 4, and the other lower die holder 4 is fed from the rear of the stamping machine body 1 until the lower die holder 4 moves into the preset cavity 43. Then, the die shifting mechanism moves it to the stamping platform of the stamping machine body 1, so that the new upper die 6 is exactly below the upper die holder 2. The die shifting mechanism is then reset. Then, the first, second, and third die clamping mechanisms are used to clamp and fix the upper die 6, lower die 5, and lower die holder 4 respectively. This completes the rapid die change, effectively reducing the workload of personnel, requiring less manual operation, and improving the efficiency of die change.

[0021] It is worth noting that the stamping machine body 1 is equipped with two lower die holders 4, which are located below the stamping head and inside the pre-set cavity 43 of the stamping machine body 1, respectively. The feeding method of both lower die holders 4 is from the rear of the stamping machine body 1. Therefore, the front of the stamping machine body 1 is only used for unloading the lower die holders 4. When the front lower die holder 4 is unloading, the rear lower die holder 4 is also feeding at the same time. The mold to be replaced is pre-suspended on the rear lower die holder 4 so that after the front lower die holder 4 has finished unloading, the rear lower die holder 4 is exactly below the stamping head of the stamping machine body 1. The mold on the rear lower die holder 4 can be quickly fixed, thereby effectively reducing the downtime of mold changing and improving the stamping efficiency of the workpiece.

[0022] like Figure 1 , Figure 3 and Figure 11As shown, the first clamping mechanism includes two first slide grooves 45 and two first clamping devices 41. The two first slide grooves 45 are both opened on the side of the upper mold base 2. The two first clamping devices 41 slide in the two first slide grooves 45 respectively. The side of the upper mold 6 is clamped to the bottom of the upper mold base 2 by the clamping ends of the two first clamping devices 41. A first connecting rod 42 is fixedly connected between the two first clamping devices 41. A handle 3 is fixedly connected to the middle of the first connecting rod 42.

[0023] Using the above scheme: When it is necessary to install the upper mold 6 at the bottom of the upper mold base 2, the upper mold 6 will be attached to the lower mold 5. Then, the stamping head of the stamping machine body 1 is used to move the upper mold base 2 downwards, so that the bottom of the upper mold base 2 contacts the upper surface of the lower mold 5. Then, the operator manually slides the handle 3 to move the two first clamping devices 41 in the two first sliding grooves 45, so that the two first clamping devices 41 contact the side of the upper mold 6. Then, the clamping end of the first clamping device 41 clamps the side of the upper mold 6, thereby quickly fixing the upper mold 6 on the upper mold base 2.

[0024] like Figures 1 to 4 , Figure 6 , Figure 7 and Figure 10 As shown, the second clamping mechanism includes two second slide grooves 38 and two second clamping devices 36. The two second slide grooves 38 are both opened on the side of the lower mold base 4. The two second clamping devices 36 slide in the two second slide grooves 38 respectively. The side of the lower mold 5 is clamped on the lower mold base 4 through the clamping ends of the two second clamping devices 36. A second connecting rod 37 is fixed between the two second clamping devices 36. The stamping machine body 1 is provided with a transmission mechanism for driving the second connecting rod 37 to move.

[0025] Using the above scheme: when the lower die base 4 moves to the stamping platform of the stamping machine body 1, it is also located below the stamping head of the stamping machine body 1, and at this time the second slide groove 38 also corresponds to the second die clamp 36. Then, the transmission mechanism drives the second connecting rod 37 to move, so that the two second die clamps 36 slide into the second slide groove 38 respectively, until the lower die 5 is clamped on the lower die base 4 through the clamping end of the second die clamp 36.

[0026] like Figures 1 to 3 , Figure 6 and Figure 10 As shown, the transmission mechanism includes a first mounting frame 7, which is fixedly connected to the body 1 of the stamping machine tool and located on one side of the lower die base 4. A movable seat 35 is slidably disposed through the first mounting frame 7. One end of the movable seat 35 is connected to the second connecting rod 37. A second mounting frame 28 is fixedly connected to the back of the first mounting frame 7. A motor 33 is mounted on the second mounting frame 28. A gear 34 is fixedly connected to the output end of the motor 33. A toothed groove 31 is provided on the movable seat 35, and the gear 34 meshes with the toothed groove 31.

[0027] Using the above solution: no manual movement of the second clamping device 36 is required. When the lower mold 5 needs to be fixed on the lower mold base 4, the operation of the motor 33 first drives the gear 34 to rotate, causing the gear 34 to move the tooth groove 31. The movement of the tooth groove 31 will drive the second connecting rod 37 and the two second clamping devices 36 to move. The two second clamping devices 36 will slide in the two second sliding grooves 38 respectively until the second clamping devices 36 contact the side of the lower mold 5. Then the operation of the motor 33 can be stopped. Then the clamping end of the second clamping device 36 clamps the side of the lower mold 5, and the lower mold 5 can be quickly fixed on the lower mold base 4. After the lower mold base 4 needs to be removed from the stamping machine body 1, the clamping of the second clamping device 36 on the lower mold 5 is first released. Then the reverse rotation of the motor 33 is used to control the second connecting rod 37 and the two second clamping devices 36 to move away from the lower mold base 4, so that the lower mold base 4 can slide and unload normally on the stamping machine body 1.

[0028] like Figure 2 and Figure 10 As shown, the third clamping mechanism includes two third slides 32 and two third clamping devices 29. The two third slides 32 are both opened on the side of the stamping machine body 1, and the third slides 32 are staggered with the second slides 38. The two third clamping devices 29 slide in the two third slides 32 respectively, and the two third clamping devices 29 are located on both sides of the first mounting frame 7. The side of the lower die base 4 is clamped on the stamping machine body 1 through the clamping ends of the two third clamping devices 29.

[0029] Using the above solution: when the lower die holder 4 moves to the stamping platform of the stamping machine body 1, the third die clamp 29 can slide in the third slide groove 32, so that the third die clamp 29 contacts the lower die holder 4, and then the clamping end of the third die clamp 29 clamps the side of the lower die holder 4, thereby quickly completing the fixation of the lower die holder 4 without additional manual operation or additional auxiliary tools.

[0030] It is worth noting that the third clamping device 29, the second clamping device 36, and the first clamping device 41 are all existing mature technologies, and the third clamping device 29, the second clamping device 36, and the first clamping device 41 are all hydraulically controlled. In addition, a hydraulic station for controlling the action of each clamping mechanism is provided on one side of the stamping machine body 1, and the specific structure and working principle of the station will not be described in detail here. The first slide 45, the third slide 32, and the second slide 38 are all T-shaped.

[0031] like Figure 2 , Figure 4 , Figure 8 and Figure 9As shown, the mold moving mechanism includes a roller guide rail 27 and a mounting base 23. The roller guide rail 27 is mounted on the body 1 of the stamping machine tool. The bottom of the lower mold base 4 is slidably sleeved on the roller guide rail 27 by a slider. The mounting base 23 is fixedly connected to the inner wall of the preset cavity 43. A first hydraulic cylinder 22 is installed in the middle of the mounting base 23. A push plate 40 is fixedly connected to the telescopic end of the first hydraulic cylinder 22. A top mold shaft 25 is fixedly connected to one end of the push plate 40. Push block assemblies for pushing the lower mold base 4 to move are provided at both ends of the top mold shaft 25.

[0032] The above scheme allows the lower die holder 4 to slide stably on the two roller guide rails 27 in the horizontal direction, preventing the lower die holder 4 from shifting on the stamping platform of the stamping machine body 1. Furthermore, the slider is a thickened, hardened slider, which improves the lower die holder 4's resistance to alternating impacts on the roller guide rails 27. When the second clamping mechanism releases its grip on the lower die holder 4 and moves away, the operation of the first hydraulic cylinder 22 drives the push plate 40 and the top die shaft 25 to move, further pushing the lower die holder 4 forward. This facilitates subsequent unloading, eliminating the need for manual pulling and reducing the risk of manual operation for workers. When the lower die holder 4 is reloaded, it is moved upwards from behind the stamping machine body 1, pushing the new lower die holder 4 from the preset cavity 43 towards the stamping platform of the stamping machine body 1. Therefore, loading and unloading the lower die holder 4 does not require manual pushing or pulling, effectively reducing the workload of personnel.

[0033] like Figure 2 , Figure 4 , Figure 8 and Figure 9 As shown, the push block assembly includes a top mold base 26, which is fixedly connected to one end of the top mold shaft 25. The bottom of the top mold base 26 is provided with a mounting groove 44, and a top module 39 is hinged to the inner wall of the mounting groove 44. The side of the top module 39 away from the lower mold base 4 is inclined, and the end of the top module 39 near the lower mold base 4 corresponds to the back of the lower mold base 4.

[0034] Using the above scheme: When the top die shaft 25 moves forward, the front top module 39 pushes the front lower die holder 4, and the rear top module 39 pushes the rear lower die holder 4, causing both lower die holders 4 to move together, and driving the corresponding lower die 5 and upper die 6 to move. After the front lower die holder 4 completes unloading, the rear lower die holder 4 is also pushed to the stamping platform of the stamping machine body 1, and then the lower die holder 4 is clamped and fixed by the second clamping mechanism. Finally, the first hydraulic cylinder 22 drives the top die shaft 25 to reset and retract, and the rear top module 39 will move away from the lower die holder. 4. When the top module 39 in front contacts the lower mold base 4, it will automatically flip up, thus preventing it from pushing the lower mold base 4. After flipping up, the top module 39 will not touch the top mold shaft 25. Therefore, the top mold shaft 25 will not hinder the normal flipping of the top module 39. After flipping, the top module 39 will continue to slide on the lower mold base 4 until the top module 39 in front is behind the lower mold base 4. Then, it will automatically swing down and reset by its own gravity without the need for an additional reset mechanism. The top module 39 can only swing forward, so the top module 39 can normally push the lower mold base 4 to move forward without pushing it backward.

[0035] like Figure 4 , Figure 8 and Figure 9 As shown, a sliding block 24 is fixedly connected to the right end surface of the top mold shaft 25, and a first groove 45 is opened on the surface of the mounting base 23, and the sliding block 24 is slidably disposed in the first groove 45.

[0036] The above solution is adopted: when the first hydraulic cylinder 22 drives the top mold shaft 25 to move through the push plate 40, the sliding block 24 will slide horizontally in the first slide groove 45, thereby ensuring the stability of the rear end of the top mold shaft 25 and improving the movement stability of the two top mold seats 26.

[0037] like Figures 1 to 3 and Figure 5As shown, the die-feeding mechanism includes a second hydraulic cylinder 30 and two die-feeding arms 14. The second hydraulic cylinder 30 is installed inside the bottom surface of the stamping machine body 1. One end of each of the two die-feeding arms 14 is hinged to the surface of the stamping machine body 1. A mounting sleeve 21 is fixedly connected to the telescopic end of the second hydraulic cylinder 30. A moving shaft 9 passes through the middle of the mounting sleeve 21. Movable plates 8 are fitted at both ends of the moving shaft 9. A fixed shaft 20 is fixedly connected between the two die-feeding arms 14. The top ends of the two movable plates 8 are fitted onto... On the surface of the fixed shaft 20, the ends of the two die-feeding arms 14 away from the press body 1 are each hinged with a connecting plate 10, and the other ends of the two connecting plates 10 are each hinged with an extension arm 15. Each extension arm 15 and the inner wall of the die-feeding roller 18 are rotatably provided with equidistant die-feeding rollers 18. The bottom surface of the lower die base 4 is concave upward to form a concave surface, and the concave surface at the bottom of the lower die base 4 is adapted to the die-feeding roller 18. A positioning mechanism for limiting the swing of the extension arm 15 is provided between the two die-feeding arms 14.

[0038] The above scheme is adopted: the second hydraulic cylinder 30 is used to control the mounting sleeve 21 and the moving shaft 9 to rise and fall together. When the moving shaft 9 descends, it will pull the fixed shaft 20 and the two die-feeding arms 14 downward through the movable plate 8 until the two die-feeding arms 14 are close to the stamping machine body 1 and retracted, so as to avoid the mechanism occupying too much operating space when not in use. When the lower mold 5 and the upper mold 6 need to be removed and moved out for replacement, the second hydraulic cylinder 30 is used to drive the moving shaft 9 to move upward. At the same time, the two movable plates 8 are used to push the fixed shaft 20 and the two die-feeding arms 14 to swing upward until the two die-feeding arms 14 are swung to a horizontal position. The lifting of the moving shaft 9 can be stopped to facilitate the conveying of the lower mold base 4, allowing the concave surface at the bottom of the lower mold base 4 to slide on the two mold feeding arms 14. After the lower mold base 4 has finished conveying the mold, the two mold feeding arms 14 can be reset by using the second hydraulic cylinder 30. When it is necessary to extend the conveying distance of the lower mold base 4, the two extension arms 15 can be swung through the two connecting plates 10 until they are on the same axis as the corresponding mold feeding arms 14 to extend the conveying distance of the lower mold base 4. Then, the positioning mechanism is used to limit the extension arms 15 to prevent the extension arms 15 from swinging randomly, ensuring that the lower mold base 4 slides steadily on the extension arms 15, making the operation more convenient.

[0039] like Figures 1 to 3 and Figure 5 As shown, the positioning mechanism includes a fixed plate 11, which is fixed between two mold feeding arms 14. Two extension arms 15 are fixed with side plates 16 near the connecting plate 10. Positioning holes 17 are opened in the middle of the two side plates 16. An electric telescopic rod 13 is installed in the middle of the fixed plate 11. A moving plate 19 is fixed to the telescopic end of the electric telescopic rod 13. Positioning rods 12 are fixed to both ends of the moving plate 19, and the positioning rods 12 are adapted to the positioning holes 17. One end of each positioning rod 12 slides through to one side of the fixed plate 11.

[0040] The above solution works as follows: When the extension arm 15 swings to the axis of the mold feeding arm 14, the electric telescopic rod 13 pulls down the moving plate 19, which in turn drives the two positioning rods 12 to move synchronously, so that the two positioning rods 12 are inserted into the corresponding positioning holes 17 respectively, thereby positioning the side plate 16 to prevent the extension arm 15 from swinging arbitrarily and affecting the movement of the lower mold base 4. When the extension arm 15 needs to be retracted, the electric telescopic rod 13 is used to push the moving plate 19 to move, so that the positioning rods 12 are pulled out from the positioning holes 17, and the extension arm 15 can swing normally to one side of the mold feeding arm 14. The operation is more convenient, and there is no need for excessive manual operation, which reduces the risk of manual operation.

[0041] The working principle and usage process of this invention are as follows: When it is necessary to replace the lower mold 5 and the upper mold 6, firstly, the stamping head of the stamping machine body 1 drives the upper mold base 2 to descend, so that the lower mold 5 and the upper mold 6 merge. Then, the first clamping device 41 releases its grip on the upper mold 6 and moves away from the upper mold base 2, allowing the upper mold 6 to fall normally onto the lower mold 5. Next, the second clamping device 36 is released from its grip on the lower mold 5. Then, under the control of the motor 33, the second clamping device 36 is moved away from the lower mold 5. Finally, the third clamping device 29 is released from its grip on the lower mold base 4, and the lower mold base 4 can be pushed and unloaded. First, the operation of the second hydraulic cylinder 30 drives the moving shaft 9 to move upward. At the same time, the two movable plates 8 push the fixed shaft 20 and the two feeding arms 14 to swing upward until the two feeding arms 14 swing to a horizontal state. Then, the lifting of the moving shaft 9 is stopped. Then, the operation of the two first hydraulic cylinders 22 drives the two top molds. The movement of shaft 25 causes the two front top modules 39 to push the lower die holder 4 forward on the two roller guides 27, allowing the concave bottom surface of the lower die holder 4 to slide and be conveyed on the die feeding arm 14. This allows the lower die 5 and upper die 6 to be quickly removed and replaced along with the lower die holder 4. While the front lower die holder 4 is unloading, the rear lower die holder 4 is pushed and moved by the two rear top modules 39 until the rear lower die holder 4, carrying the new lower die 5 and upper die 6, moves to the stamping head of the stamping machine body 1. At this point, the operation of the first hydraulic cylinder 22 stops, and the two top modules 39 move backward to reset. During the reset process, the top modules 39 do not push the lower die holder 4. After the top modules 39 have completed the reset, the upper die 6, lower die 5, and lower die holder 4 are fixed by the corresponding clamping mechanism. This completes the rapid die change, effectively reducing downtime during die change, improving die change efficiency, and also improving the stamping efficiency of the workpiece.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are 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 process, method, article, or apparatus.

[0043] 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 special-shaped die holder for a stamping machine tool, comprising a stamping machine tool body (1), an upper die holder (2), and a lower die holder (4), characterized in that: The upper die holder (2) is fixedly connected to the stamping head of the stamping machine body (1). The bottom of the upper die holder (2) is provided with two opposing first clamping mechanisms. The upper die holder (2) is connected to the upper die (6) through the two first clamping mechanisms. The lower die holder (4) is provided with second clamping mechanisms on both sides. The lower die holder (4) is installed with the lower die (5) through the two second clamping mechanisms. The stamping machine body (1) is provided with third clamping mechanisms on both sides. The lower die holder (4) is fixed to the stamping platform of the stamping machine body (1) through the two third clamping mechanisms. The stamping machine body (1) has a pre-set cavity (43) in the middle. The pre-set cavity (43) has a mold moving mechanism on both sides. The stamping machine body (1) has a mold feeding mechanism on the front and rear sides.

2. The stamping machine tool irregular die fixing frame according to claim 1, characterized in that: The first clamping mechanism includes two first slide grooves (45) and two first clamping devices (41). The two first slide grooves (45) are opened on the side of the upper mold base (2). The two first clamping devices (41) slide in the two first slide grooves (45) respectively. The side of the upper mold (6) is clamped to the bottom of the upper mold base (2) by the clamping ends of the two first clamping devices (41). A first connecting rod (42) is fixed between the two first clamping devices (41). A handle (3) is fixed in the middle of the first connecting rod (42).

3. The stamping machine tool irregular die fixing frame according to claim 1, characterized in that: The second clamping mechanism includes two second slides (38) and two second clamping devices (36). The two second slides (38) are both opened on the side of the lower mold base (4). The two second clamping devices (36) slide in the two second slides (38) respectively. The side of the lower mold (5) is clamped on the lower mold base (4) by the clamping ends of the two second clamping devices (36). A second connecting rod (37) is fixed between the two second clamping devices (36). A transmission mechanism for driving the displacement of the second connecting rod (37) is provided on the body of the stamping machine (1).

4. The stamping machine tool irregular die fixing frame according to claim 3, characterized in that: The transmission mechanism includes a first mounting frame (7), which is fixedly connected to the body (1) of the stamping machine tool and located on one side of the lower die base (4). A movable seat (35) is slidably disposed through the first mounting frame (7). One end of the movable seat (35) is connected to the second connecting rod (37). A second mounting frame (28) is fixedly connected to the back of the first mounting frame (7). A motor (33) is mounted on the second mounting frame (28). A gear (34) is fixedly connected to the output end of the motor (33). A tooth groove (31) is opened on the movable seat (35), and the gear (34) meshes with the tooth groove (31).

5. The stamping machine tool irregular die fixing frame according to claim 4, characterized in that: The third clamping mechanism includes two third slides (32) and two third clamping devices (29). The two third slides (32) are both opened on the side of the stamping machine body (1), and the third slides (32) are staggered from the second slides (38). The two third clamping devices (29) slide in the two third slides (32) respectively, and the two third clamping devices (29) are located on both sides of the first mounting frame (7). The side of the lower die base (4) is clamped on the stamping machine body (1) by the clamping ends of the two third clamping devices (29).

6. The stamping machine tool irregular die fixing frame according to claim 1, characterized in that: The mold moving mechanism includes a roller guide rail (27) and a mounting base (23). The roller guide rail (27) is mounted on the body of the stamping machine (1). The bottom of the lower mold base (4) is slidably sleeved on the roller guide rail (27) by a slider. The mounting base (23) is fixedly connected to the inner wall of the pre-set cavity (43). A first hydraulic cylinder (22) is installed in the middle of the mounting base (23). A push plate (40) is fixedly connected to the telescopic end of the first hydraulic cylinder (22). A top mold shaft (25) is fixedly connected to one end of the push plate (40). Push block assemblies for pushing the lower mold base (4) to move are provided at both ends of the top mold shaft (25).

7. The stamping machine tool irregular die fixing frame according to claim 6, characterized in that: The push block assembly includes a top mold base (26), which is fixedly connected to one end of the top mold shaft (25). The bottom of the top mold base (26) is provided with an installation groove (44), and a top module (39) is hinged to the inner wall of the installation groove (44). The side of the top module (39) away from the lower mold base (4) is inclined, and the end of the top module (39) close to the lower mold base (4) corresponds to the back of the lower mold base (4).

8. The stamping machine tool irregular die fixing frame according to claim 6, characterized in that: A sliding block (24) is fixedly connected to the right end surface of the top mold shaft (25), and a first groove (45) is opened on the surface of the mounting base (23), and the sliding block (24) is slidably disposed in the first groove (45).

9. The stamping machine tool irregular die fixing frame according to claim 1, characterized in that: The die feeding mechanism includes a second hydraulic cylinder (30) and two die feeding arms (14). The second hydraulic cylinder (30) is installed inside the bottom surface of the stamping machine body (1). One end of each of the two die feeding arms (14) is hinged to the surface of the stamping machine body (1). The telescopic end of the second hydraulic cylinder (30) is fixedly connected to a mounting sleeve (21). A moving shaft (9) passes through the middle of the mounting sleeve (21). Movable plates (8) are fitted at both ends of the moving shaft (9). A fixed shaft (20) is fixedly connected between the two die feeding arms (14). The top ends of the two movable plates (8) are fitted with... On the surface of the fixed shaft (20), the two feeding arms (14) are hinged to a connecting plate (10) at one end away from the press body (1), and the other end of the two connecting plates (10) is hinged to an extension arm (15). Each extension arm (15) and the inner wall of the feeding roller (18) are rotatably provided with feeding rollers (18) arranged at equal distances. The bottom surface of the lower die base (4) is concave upward to form a concave surface, and the concave surface at the bottom of the lower die base (4) is adapted to the feeding roller (18). A positioning mechanism for limiting the swing of the extension arm (15) is provided between the two feeding arms (14).

10. The stamping machine tool irregular die fixing frame according to claim 9, characterized in that: The positioning mechanism includes a fixed plate (11), which is fixed between two mold feeding arms (14). The two extension arms (15) are fixed with side plates (16) on the side near the connecting plate (10). The two side plates (16) are provided with positioning holes (17) in the middle. An electric telescopic rod (13) is installed in the middle of the fixed plate (11). The telescopic end of the electric telescopic rod (13) is fixed with a moving plate (19). Both ends of the moving plate (19) are fixed with positioning rods (12), and the positioning rods (12) are adapted to the positioning holes (17). One end of each of the two positioning rods (12) slides through to one side of the fixed plate (11).

Images