High-temperature punch forming table for hot punch forming steel plate and control method of high-temperature punch forming table

Abstract

The invention relates to the technical field of hot stamping, in particular to a hot stamping forming steel plate high-temperature stamping forming table and a control method thereof.The hot stamping forming steel plate high-temperature stamping forming table comprises a bottom frame, an upper stamping die and a lower stamping die, and stamping grooves are formed in the upper end and the lower end of the lower stamping die; a lower stamping die is installed in the support base through a connecting piece and a second fixing shaft, an upper stamping die is arranged at the upper end of the lower stamping die, the upper end of the upper stamping die is fixedly connected with the moving end of the hydraulic push rod through a bolt, positioning mechanisms are arranged on the two sides of the lower stamping die, and a driving mechanism is arranged on one side of each positioning mechanism. According to the double-sided stamping lower die, after stamping is completed once, the double-sided stamping lower die can be turned over, then automatic discharging can be achieved, meanwhile, the cooling duration of the stamping lower die in the continuous stamping process can be prolonged, and the situation that due to overheating of the stamping lower die, the double-sided stamping lower die cannot be cooled easily can be effectively reduced. And the service life is influenced due to aggravated abrasion.

Description

Technical Field

[0001] The invention relates to the technical field of hot stamping, and in particular to a hot stamping steel plate high-temperature stamping forming station and a control method thereof. Background Art

[0002] Hot stamping steel plate high temperature stamping forming station is a kind of equipment used to produce high-strength automotive parts. Its core process is to heat the high-strength steel plate to the austenitizing temperature (usually 880-950℃), and then quickly send it into a mold with a cooling system for stamping and forming, and quickly quench and cool it under pressure holding. This process transforms austenite into martensite, thereby greatly improving the strength of the parts. It can produce stamping parts with a strength of up to 1500MPa. The key process of this equipment includes heating, stamping, pressure holding and cooling. The heating process directly affects the stamping performance of high-strength steel plates, while the quenching during the stamping process plays a decisive role in the hardening of the parts strength. The hot stamping forming process can be divided into two categories: direct hot stamping process and indirect hot stamping process. The direct hot stamping process is suitable for simple parts, and the indirect hot stamping process is suitable for parts with complex shapes or deep drawing. In the process of continuous high-temperature stamping of hot stamping steel plates, the stamping lower die installed on the forming table has the problem of overheating, which will aggravate the wear rate of the stamping lower die installed on the forming table, and further affect the actual service life of the stamping lower die installed on the forming table. Therefore, in order to solve the above problems, a high-temperature stamping forming table for hot stamping steel plates and a control method thereof are proposed. Summary of the invention

[0003] The purpose of the present invention is to provide a high-temperature stamping forming table for hot stamping steel plates and a control method thereof, so as to solve the problem of overheating of the stamping lower die installed on the forming table during continuous high-temperature stamping of the hot stamping steel plates, which will aggravate the wear rate of the stamping lower die installed on the forming table, and further affect the actual service life of the stamping lower die installed on the forming table.

[0004] To achieve the above object, the present invention provides the following technical solutions: A hot stamping steel plate high-temperature stamping forming table and a control method thereof, comprising a bottom frame, a stamping upper die and a stamping lower die with stamping grooves at both the upper and lower ends, a bracket seat is welded and fixed to the upper end of the bottom frame, a stamping lower die is installed inside the bracket seat through a connecting piece and a second fixed shaft, a stamping upper die is arranged at the upper end of the stamping lower die, the upper end of the stamping upper die is fixedly connected to the movable end of a hydraulic push rod by bolts, positioning mechanisms are arranged on both sides of the stamping lower die, and a driving mechanism is arranged on one side of the positioning mechanism; the bracket seat comprises a square plate, a central square groove is arranged in the middle of the square plate, a guide column is welded and fixed inside the central square groove, and a through hole and a circular hole are arranged on the inner side of the central square groove; the stamping lower die comprises a die body, and the die body Side grooves are provided on both sides, and the driving mechanism includes a driving rod, a vertical groove is provided on the inner side of the driving rod, a limiting protrusion is welded and fixed on the inner side of the vertical groove, the upper end of the limiting protrusion is in close contact with the rotating plate, and a rotating shaft is welded and fixed on the inner side of one end of the rotating plate, and the positioning mechanism includes a positioning plate, a connecting hole is provided on the inner side of the positioning plate, a column rod is slidably connected to the inner side of one end of the positioning plate, and a cross bar is welded and fixed to one end of the positioning plate; the connecting member includes a positioning column, a raised plate is welded and fixed on one end of the positioning column, a mounting hole is provided on the inner side of the other end of the positioning column, a clamping hole is provided on the inner side of the mounting hole, a second spring is installed inside the clamping hole, a pad is fixedly connected to the middle of the second spring, and the pad is fixedly connected to the side of the first fixed shaft.

[0005] As a further optimization of the present invention, the stamping lower die is installed inside the central square groove, one end of the stamping lower die is rotatably connected to the square plate through a second fixed shaft, and the central square groove is connected to the through hole and the circular hole.

[0006] As a further optimization of the present invention, there are four guide columns, a first spring is provided on the outside of the guide column, one end of the first spring is fixedly connected to the positioning plate, the other end of the first spring is fixedly connected to the inner wall of the central square groove, and the guide column is slidably connected to the positioning plate through a connecting hole.

[0007] As a further optimization of the present invention, the circular hole and the positioning column are rotatably connected via a bearing, a notch is provided on one side of the circular hole for placing a driving mechanism and a connecting piece, and the driving rod is slidably connected to the square plate via the notch.

[0008] As a further optimization of the present invention, two of the side grooves and the positioning mechanism are provided, the side grooves and the positioning mechanisms correspond one to one, the positioning plate is L-shaped, the end of the positioning plate close to the mold body is arc-shaped, the column rod slidably connected to one end of the positioning plate is installed inside the through hole, and the column rod is fixedly connected to the inner wall of the through hole.

[0009] As a further optimization of the present invention, one end of the cross bar away from the positioning plate is arc-shaped, the cross bar is in close contact with the raised plate, and the raised plate and the cross bar are both arranged outside the square plate.

[0010] As a further optimization of the present invention, the driving rod and the gear ring are arranged on the same vertical plane, the upper end of the driving rod is fixedly connected to the stamping upper mold, and there are multiple limit protrusions, rotating plates and rotating shafts arranged inside the driving rod, and there are two limit protrusions arranged at the lower end of any rotating plate.

[0011] As a further optimization of the present invention, the first fixed shaft is coaxially arranged with the positioning column, the first fixed shaft is rotatably connected with the positioning column through the mounting hole, the pads arranged on both sides of the first fixed shaft are arranged inside the card hole, and the pads correspond one to one with the card hole.

[0012] As a further optimization of the present invention, a gear ring is welded and fixed to the middle outer side of the positioning column, and one side of the gear ring is arranged inside the vertical groove.

[0013] As a further optimized content of the present invention, the following steps are included: Step I: placing the steel plate to be hot stamped on the upper end of the stamping lower die: placing the steel plate to be hot stamped inside the stamping groove opened at the upper end of the stamping lower die for positioning; Step II: Control the upper die of the stamping press to move downward to stamp the steel plate: After placement is completed, control the hydraulic push rod to drive the upper die of the stamping press to move downward. During the downward movement of the upper die of the stamping press, the lower die of the stamping press drives the driving rod to move downward. During this process, the rotating plate contacts the gear ring and rotates. After the stamping is completed, the upper die of the stamping press moves upward. At this time, the upper end of the rotating plate contacts the gear ring. During the contact process, the rotating plate will not rotate, thereby driving the gear ring to rotate. During the rotation of the gear ring, the raised plate is synchronously driven to rotate. During the rotation of the raised plate, the cross bar is pushed to move away from the connecting piece, thereby pushing the positioning plate out of the side groove. When the positioning plate is completely moved out of the side groove, the second spring is compressed to the limit, thereby driving the first fixed shaft to rotate through the pad. During the rotation of the first fixed shaft, the lower die of the stamping press is driven to flip; Step III: After the stamping is completed, the material is automatically unloaded, and the lower stamping die is controlled to rotate 180° to prepare for the next stamping: During the flipping process of the lower stamping die, the steel plate after stamping is dropped to the lower end of the bottom frame for unloading, and at the same time, the lower stamping die completes a 180° flip. At this time, the raised plate completes a 180° flip, and the stamping upper die returns to its initial position. The positioning plate is pushed by the first spring to move to the inside of the side groove, where the lower stamping die is positioned to ensure the stability of the lower stamping die during the stamping process.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by providing a driving mechanism and a connecting piece, the double-sided stamping lower die can be turned over after stamping is completed once, thereby realizing automatic material unloading, and at the same time, the cooling time of the stamping lower die during the continuous stamping process can be increased, which can effectively reduce the problem of the lower die being overheated and aggravated in wear, thereby affecting the service life; 2. In the present invention, the positioning mechanism is provided to further improve the stability of the lower die during hot stamping, and the thrust of the raised plate can be used to automatically retract the lower die during the flipping of the lower die, so as to prevent the problem of hindering the flipping of the lower die. 3. In the present invention, by providing connecting parts, the up and down movement of the stamping upper die can be used as a driving force, and corresponding operations can be performed under the drive of the driving mechanism to achieve the coordinated work of multiple components, which has a high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support seat structure of the present invention; Figure 3 This is a schematic diagram of the stamping lower die structure of the present invention; Figure 4 This is a schematic diagram of the installation position structure of the connecting piece of the present invention; Figure 5 It is a schematic diagram of the positioning mechanism structure of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the structure at A in the middle; Figure 7 It is a schematic diagram of the structure of the connecting piece of the present invention.

[0016] In the figure: 1. bottom frame; 2. Bracket seat; 21. Square plate; 22. Center square groove; 23. Guide column; 24. Through hole; 25. Round hole; 3. Hydraulic push rod; 4. Stamping upper die; 5. Stamping lower die; 51. Die body; 52. Side groove; 6. Driving mechanism; 61. Driving rod; 62. Position limiting protrusion; 63. Vertical groove; 64. Rotating plate; 65. Rotating shaft; 7. Positioning mechanism; 71. Positioning plate; 72. Post; 73. Connecting hole; 74. Crossbar; 8. First spring; 9. Connecting piece; 91. Positioning column; 92. Raised plate; 93. Gear ring; 94. Mounting hole; 95. Clamping hole; 96. First fixed shaft; 97. Cushion block; 98. Second spring; 10. Second fixed axis. DETAILED DESCRIPTION

[0017] See also Figure 1-7 , the present invention provides a technical solution: A hot stamping steel plate high-temperature stamping forming table and a control method thereof, comprising a bottom frame 1, a stamping upper die 4 and a stamping lower die 5 with stamping grooves at both the upper and lower ends, a bracket seat 2 is welded and fixed at the upper end of the bottom frame 1, a stamping lower die 5 is installed inside the bracket seat 2 through a connecting piece 9 and a second fixed shaft 10, a stamping upper die 4 is arranged at the upper end of the stamping lower die 5, the upper end of the stamping upper die 4 is fixedly connected to the moving end of the hydraulic push rod 3 by bolts, positioning mechanisms 7 are arranged on both sides of the stamping lower die 5, and a driving mechanism 6 is arranged on one side of the positioning mechanism 7; the bracket seat 2 comprises a square plate 21, a central square groove 22 is arranged in the middle of the square plate 21, a guide column 23 is welded and fixed inside the central square groove 22, and a through hole 24 and a round hole 25 are arranged on the inner side of the central square groove 22; the stamping lower die 5 comprises a die body 51, and side holes 25 are arranged on both sides of the die body 51 Slot 52, the driving mechanism 6 includes a driving rod 61, a vertical groove 63 is opened on the inner side of the driving rod 61, a limiting protrusion 62 is welded and fixed on the inner side of the vertical groove 63, the upper end of the limiting protrusion 62 is in close contact with the rotating plate 64, and a rotating shaft 65 is welded and fixed on the inner side of one end of the rotating plate 64, the positioning mechanism 7 includes a positioning plate 71, a connecting hole 73 is opened on the inner side of the positioning plate 71, a column rod 72 is slidably connected to the inner side of one end of the positioning plate 71, and a cross bar 74 is welded and fixed to one end of the positioning plate 71; the connecting member 9 includes a positioning column 91, a raised plate 92 is welded and fixed to one end of the positioning column 91, a mounting hole 94 is opened on the inner side of the other end of the positioning column 91, a clamping hole 95 is opened on the inner side of the mounting hole 94, a second spring 98 is installed inside the clamping hole 95, a cushion block 97 is fixedly connected in the middle of the second spring 98, and the cushion block 97 is fixedly connected to the side of the first fixed shaft 96.

[0018] As a further technical solution of this solution, the stamping lower die 5 is installed inside the central square groove 22, one end of the stamping lower die 5 is rotatably connected to the square plate 21 through the second fixed shaft 10, and the central square groove 22 is connected to the through hole 24 and the circular hole 25. Through the above arrangement, the smoothness of the stamping lower die 5 during rotation can be ensured; As a further technical solution of this solution, four guide posts 23 are provided, and a first spring 8 is provided on the outer side of the guide post 23. One end of the first spring 8 is fixedly connected to the positioning plate 71, and the other end of the first spring 8 is fixedly connected to the inner wall of the central square groove 22. The guide post 23 is slidably connected to the positioning plate 71 through the connecting hole 73. The above arrangement can further improve the stability of the positioning plate 71 during movement. As a further technical solution of the present invention, the circular hole 25 is rotatably connected to the positioning column 91 through a bearing, a notch is provided on one side of the circular hole 25 for placing the driving mechanism 6 and the connecting member 9, and the driving rod 61 is slidably connected to the square plate 21 through the notch. Through the above arrangement, the stamping lower die 5 can be stably installed inside the square plate 21; As a technical solution for further implementation of this solution, two side grooves 52 and two positioning mechanisms 7 are provided, and the side grooves 52 and the positioning mechanisms 7 correspond one to one. The positioning plate 71 is L-shaped, and the end of the positioning plate 71 close to the mold body 51 is arc-shaped. The column rod 72 slidably connected to one end of the positioning plate 71 is installed inside the through hole 24, and the column rod 72 is fixedly connected to the inner wall of the through hole 24. By setting the two positioning mechanisms 7, the two sides of the stamping lower mold 5 can be stably limited; As a further technical solution of the present invention, the end of the cross bar 74 away from the positioning plate 71 is arc-shaped, the cross bar 74 is in close contact with the raised plate 92, and the raised plate 92 and the cross bar 74 are both arranged outside the square plate 21. Through the above arrangement, the cross bar 74 can be driven to move by the rotation of the raised plate 92; As a technical solution further implemented in this scheme, the driving rod 61 and the gear ring 93 are arranged on the same vertical plane, the upper end of the driving rod 61 is fixedly connected to the stamping upper die 4, and the limiting protrusion 62, the rotating plate 64 and the rotating shaft 65 arranged inside the driving rod 61 are provided with multiple, and the limiting protrusion 62 arranged at the lower end of any rotating plate 64 is provided with two. The above arrangement can improve the stability of the overall operation of the device during the overall operation of the device; As a further technical solution for implementing the present invention, the first fixed shaft 96 is coaxially arranged with the positioning column 91, and the first fixed shaft 96 is rotatably connected with the positioning column 91 through the mounting hole 94. The cushion blocks 97 arranged on both sides of the first fixed shaft 96 are arranged inside the clamping hole 95, and the cushion blocks 97 correspond to the clamping hole 95 one by one. Through the above arrangement, the cushion blocks 97 can be used to make the positioning column 91 drive the first fixed shaft 96 to rotate stably; As a technical solution for further implementation of this scheme, a gear ring 93 is welded and fixed to the middle outer side of the positioning column 91, and one side of the gear ring 93 is arranged inside the vertical groove 63. Through the above arrangement, the gear ring 93 can be driven to rotate stably through the rotating plate 64 during the movement of the driving rod 61.

[0019] As a technical solution for further implementing the present scheme, the following steps are included: Step I: placing the steel plate to be hot stamped on the upper end of the stamping lower die 5: placing the steel plate to be hot stamped inside the stamping groove opened on the upper end of the stamping lower die 5 for positioning; Step II: Control the stamping upper die 4 to move downward to stamp the steel plate: After placement is completed, control the hydraulic push rod 3 to drive the stamping upper die 4 to move downward. During the downward movement of the stamping upper die 4, the stamping lower die 4 drives the driving rod 61 to move downward. During this process, the rotating plate 64 contacts the gear ring 83 and rotates. After stamping is completed, the stamping upper die 4 moves upward. At this time, the upper end of the rotating plate 64 contacts the gear ring 93. During the contact process, the rotating plate 64 will not rotate, thereby driving the gear ring 93 to rotate. During the rotation of the gear ring 93, the raised plate 92 is synchronously driven to rotate. During the rotation of the raised plate 92, the cross bar 74 is pushed to move away from the connecting member 9, thereby pushing the positioning plate 71 out of the side groove 52. When the positioning plate 71 is completely moved out of the side groove 52, the second spring 98 is compressed to the limit, thereby driving the first fixed shaft 96 to rotate through the pad 97. During the rotation of the first fixed shaft 96, the stamping lower die 5 is driven to flip; Step III: After the stamping is completed, the material is automatically unloaded, and the lower stamping die 5 is controlled to rotate 180° to prepare for the next stamping: during the flipping process of the lower stamping die 5, the steel plate after stamping is dropped to the lower end of the bottom frame 1 for unloading, and at the same time, the lower stamping die 5 completes a 180° flip. At this time, the raised plate 92 completes a 180° flip, and the stamping upper die 4 returns to its initial position. The positioning plate 71 is pushed by the first spring 8 and moves to the inside of the side groove 52, where the lower stamping die 5 is positioned to ensure the stability of the lower stamping die 5 during the stamping process.

[0020] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A hot stamping steel plate high temperature stamping forming table, comprising a bottom frame (1), a stamping upper die (4) and a stamping lower die (5) with stamping grooves at both the upper and lower ends, characterized in that: A support seat (2) is welded and fixed to the upper end of the bottom frame (1); a stamping lower die (5) is installed inside the support seat (2) via a connecting piece (9) and a second fixed shaft (10); a stamping upper die (4) is provided at the upper end of the stamping lower die (5); the upper end of the stamping upper die (4) is fixedly connected to the movable end of the hydraulic push rod (3) via bolts; positioning mechanisms (7) are provided on both sides of the stamping lower die (5); and a driving mechanism (6) is provided on one side of the positioning mechanism (7); The bracket seat (2) comprises a square plate (21), a central square groove (22) is provided in the middle of the square plate (21), a guide column (23) is welded and fixed inside the central square groove (22), and a through hole (24) and a circular hole (25) are provided inside the central square groove (22); The lower stamping die (5) comprises a die body (51), and side grooves (52) are provided on both sides of the die body (51); the driving mechanism (6) comprises a driving rod (61), and a vertical groove (63) is provided on the inner side of the driving rod (61); a limiting protrusion (62) is welded and fixed on the inner side of the vertical groove (63); the upper end of the limiting protrusion (62) is in close contact with a rotating plate (64); a rotating shaft (65) is welded and fixed on the inner side of one end of the rotating plate (64); the positioning mechanism (7) comprises a positioning plate (71), and a connecting hole (73) is provided on the inner side of the positioning plate (71); a column rod (72) is slidably connected to the inner side of one end of the positioning plate (71); and a cross bar (74) is welded and fixed on one end of the positioning plate (71); The connecting member (9) comprises a positioning column (91), a protruding plate (92) is welded and fixed to one end of the positioning column (91), a mounting hole (94) is provided on the inner side of the other end of the positioning column (91), a clamping hole (95) is provided on the inner side of the mounting hole (94), a second spring (98) is installed inside the clamping hole (95), a cushion block (97) is fixedly connected in the middle of the second spring (98), and the cushion block (97) is fixedly connected to the side of the first fixed shaft (96).

2. A hot stamping steel plate high temperature stamping forming table according to claim 1, characterized in that: The stamping lower die (5) is installed inside the central square groove (22); one end of the stamping lower die (5) is rotatably connected to the square plate (21) via a second fixed shaft (10); and the central square groove (22) is connected to the through hole (24) and the circular hole (25).

3. A hot stamping steel plate high temperature stamping forming station according to claim 1, characterized in that: Four guide columns (23) are provided. A first spring (8) is provided on the outer side of the guide column (23). One end of the first spring (8) is fixedly connected to the positioning plate (71). The other end of the first spring (8) is fixedly connected to the inner wall of the central square groove (22). The guide column (23) is slidably connected to the positioning plate (71) via a connecting hole (73).

4. A hot stamping steel plate high temperature stamping forming station according to claim 1, characterized in that: The circular hole (25) and the positioning column (91) are rotatably connected via a bearing, a notch for accommodating the driving mechanism (6) and the connecting member (9) is provided on one side of the circular hole (25), and the driving rod (61) is slidably connected to the square plate (21) via the notch.

5. The hot stamping steel plate high temperature stamping forming station according to claim 1, characterized in that: The side grooves (52) and the positioning mechanisms (7) are each provided with two, and the side grooves (52) and the positioning mechanisms (7) correspond one to one. The positioning plate (71) is L-shaped, and one end of the positioning plate (71) close to the mold body (51) is arc-shaped. A column rod (72) slidably connected to one end of the positioning plate (71) is installed inside the through hole (24), and the column rod (72) is fixedly connected to the inner wall of the through hole (24).

6. A hot stamping steel plate high temperature stamping forming station according to claim 1, characterized in that: One end of the cross bar (74) away from the positioning plate (71) is arc-shaped, the cross bar (74) is in close contact with the raised plate (92), and the raised plate (92) and the cross bar (74) are both arranged outside the square plate (21).

7. A hot stamping steel plate high temperature stamping forming station according to claim 1, characterized in that: The driving rod (61) and the gear ring (93) are arranged on the same vertical plane. The upper end of the driving rod (61) is fixedly connected to the stamping upper die (4). A plurality of limiting protrusions (62), rotating plates (64) and rotating shafts (65) are arranged inside the driving rod (61). Two limiting protrusions (62) are arranged at the lower end of any rotating plate (64).

8. The hot stamping steel plate high temperature stamping forming station according to claim 1, characterized in that: The first fixed shaft (96) is coaxially arranged with the positioning column (91); the first fixed shaft (96) is rotatably connected to the positioning column (91) via the mounting hole (94); cushion blocks (97) arranged on both sides of the first fixed shaft (96) are arranged inside the clamping hole (95); and the cushion blocks (97) correspond one to one with the clamping hole (95).

9. The hot stamping steel plate high temperature stamping forming station according to claim 1, characterized in that: A gear ring (93) is welded and fixed to the middle outer side of the positioning column (91), and one side of the gear ring (93) is arranged inside the vertical groove (63).

10. A control method for a hot stamping steel plate high temperature stamping forming station according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step I: placing the steel plate to be hot stamped on the upper end of the lower stamping die (5); placing the steel plate to be hot stamped inside the stamping groove opened at the upper end of the lower stamping die (5) for positioning; Step II: Control the upper stamping die (4) to move downward to stamp the steel plate: After placement is completed, control the hydraulic push rod (3) to drive the upper stamping die (4) to move downward. During the downward movement of the upper stamping die (4), the lower stamping die (4) drives the driving rod (61) to move downward. During this process, the rotating plate (64) contacts the gear ring (83) and rotates. After stamping is completed, the upper stamping die (4) moves upward. At this time, the upper end of the rotating plate (64) contacts the gear ring (93). During the contact process, the rotating plate (64) does not rotate, thereby driving the gear ring (93). 3) rotating, the gear ring (93) synchronously drives the raised plate (92) to rotate during the rotation process, and the raised plate (92) pushes the cross bar (74) to move away from the connecting member (9) during the rotation process, thereby pushing the positioning plate (71) to move out of the side groove (52), and when the positioning plate (71) is completely moved out of the side groove (52), the second spring (98) is compressed to the limit, thereby driving the first fixed shaft (96) to rotate through the cushion block (97), and the first fixed shaft (96) drives the lower stamping die (5) to flip during the rotation process; Step III: After the stamping is completed, the material is automatically unloaded, and the lower stamping die (5) is controlled to rotate 180° to prepare for the next stamping: during the flipping process, the stamping lower die (5) drops the stamped steel plate to the lower end of the bottom frame (1) to unload the material. At the same time, the stamping lower die (5) completes a 180° flip. At this time, the raised plate (92) completes a 180° flip, and the stamping upper die (4) returns to its initial position. The positioning plate (71) is pushed by the first spring (8) to move to the inside of the side groove (52), where the stamping lower die (5) is positioned to ensure the stability of the stamping lower die (5) during the stamping process.

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