Sheet metal bending die

Abstract

The technical scheme belongs to the technical field of sheet metal processing equipment, and particularly relates to a sheet metal bending die, which comprises a movable die device, a fixed die device, and a bending mechanism.

Description

Technical Field

[0001] This technical solution relates to the field of sheet metal processing equipment technology, specifically to a sheet metal bending die. Background Technology

[0002] Sheet metal bending is a process in which pressure is applied to metal sheets using specialized equipment to cause plastic deformation and form a specific angle. Traditional bending processes involve manufacturing a mold of a specific shape, placing the workpiece inside the mold cavity, and then moving the mold to press the workpiece so that it is bent tightly against the inner wall of the cavity. This stamping bending method has no buffer, which makes it difficult to meet the requirements for the appearance and quality of the workpiece. It also causes problems such as metal springback, unstable dimensions, low production efficiency, and low part qualification rate.

[0003] Furthermore, existing bending equipment generally uses a right-angle design for the bending dies, which can bend the edges of metal materials to 90 degrees. However, due to the springback characteristics of metal materials, stress changes will occur inside the metal during the bending process. When the external force is removed, the metal material will rebound due to elastic deformation. This results in the bending angle of the metal material after bending with a right-angle die often being greater than the preset 90 degrees, making it difficult to meet the angle accuracy requirements and affecting product quality and performance. Summary of the Invention

[0004] The purpose of this technical solution is to provide a sheet metal bending die. During the die closing process, the bending drive assembly moves with the moving die holder. After the moving die holder and the fixed die holder press the workpiece together, the drive flipping assembly bends the workpiece, thus solving the problem of low production efficiency of the original equipment.

[0005] The purpose of this technical solution is achieved as follows:

[0006] A sheet metal bending die includes: a moving die device, including a moving die base and a moving die seat disposed on the moving die base; and a fixed die device, including a fixed die base and a fixed die seat disposed on the fixed die base; after the die is closed, the fixed die seat cooperates with the moving die seat to clamp the main body of the workpiece; wherein, the moving die device further includes a bending mechanism disposed between the moving die base and the moving die seat, which can move along the die closing direction to bend the bending portion of the workpiece; the bending mechanism includes: a flip plate assembly hinged to the moving die base, the flip plate assembly including a flip plate member having a contact surface abutting against the bending portion; and a bending drive assembly disposed on the moving die base, the bending drive assembly including a bending member; wherein, the moving die base drives the bending member to move toward the flip plate member, drives the flip plate member to rotate and realizes the bending of the bending portion.

[0007] Preferably, the bending drive assembly further includes a bending mounting base, which is disposed on the moving mold base, and the bending component is disposed on the bending mounting base; after the mold is closed, when the moving mold base drives the bending mounting base to move towards the moving mold base, the bending component moves against the flip plate component and flips it during operation.

[0008] Preferably, the flip plate assembly further includes: a flip plate mounting bracket disposed on the moving mold base; a flip plate shaft disposed on the flip plate mounting bracket; and a reset tension spring, the two ends of which are respectively connected to the moving mold base and the flip plate component; wherein, the flip plate component is disposed on the flip plate shaft, and the reset tension spring is used to ensure that the flip plate component always has a tendency to rotate in the direction of the bending component.

[0009] Preferably, the bending mechanism further includes a propulsion assembly comprising: a propulsion section one, which is movably disposed within the slide of the bending mounting base and has an inclined surface one; and a propulsion section two, which is disposed on the fixed mold base and has an inclined surface two adapted to the inclined surface one; wherein, a bending mounting frame is disposed on the propulsion section one, and the bending member is disposed on the bending mounting frame and movably disposed on the propulsion section one; when the propulsion section one moves toward the propulsion section two, under the action of the inclined surface one and the inclined surface two, the bending member can move toward the fixed mold base and drive the flip plate member to rotate.

[0010] Preferably, the propulsion assembly further includes: a propulsion seat disposed on the moving mold base; a reset pin movably disposed within the propulsion seat and passing through the propulsion seat to connect with the propulsion part; a reset baffle disposed on the reset pin; and a reset spring sleeved outside the reset pin and located between the reset baffle and the propulsion seat.

[0011] Preferably, the fixed mold base is provided with a material feeding assembly, which includes: a material feeding support portion movably disposed on the fixed mold base; a material feeding support column movably disposed on the fixed mold base and movably abutting against the material feeding support portion; and a material feeding spring disposed within the fixed mold base, for making the material feeding support column always tend to move towards the material feeding support portion.

[0012] Preferably, the outer wall of the feeding support is inclined inward, and the angle formed between the side wall and its top surface is less than 90°, and the side wall is the workpiece support surface.

[0013] Preferably, a protrusion is inclinedly provided on the inner sidewall of the material feeding support, and a groove adapted to the protrusion is provided on the fixed mold base; when the material feeding support is installed on the fixed mold base, the protrusion is placed in the groove to realize the oblique movement of the material feeding support.

[0014] Preferably, a moving mold reset component is provided between the moving mold base and the moving mold seat.

[0015] Preferably, the moving mold base is provided with a fixed mold guide post, the upper end of which is disposed on the moving mold base and the lower end is movably placed in a fixed mold guide hole opened on the fixed mold base; the moving mold base is provided with a moving mold guide post, the lower end of which is disposed on the moving mold base and the upper end is movably placed in a moving mold guide hole opened on the moving mold base.

[0016] The key and beneficial technical effects of this technical solution compared to existing technologies are:

[0017] 1. The moving mold device designed in this technical solution will drive the bending mechanism to move synchronously when the mold is closed. The bending part will continue to move when the mold is closed and provide rotational power to the flipping part. At this time, the flipping part is in close contact with the surface of the workpiece. As the flipping part rotates, the bending of the workpiece is completed. During this process, the bending part gradually descends, and the driven flipping part also gradually flips. This can effectively improve the quality of the bent product and make its dimensions more in line with the standard.

[0018] 2. The propulsion component designed in this technical solution can effectively improve the problem of insufficient bending angle caused by metal springback. When the propulsion part one moves to the position of the propulsion part two, the bending part of the workpiece has been bent by 90°. At this time, the propulsion part one and the propulsion part two will continue to push the flip plate to rotate through the action of the inclined plane, so that the bending part will be bent by more than 90°. At this time, after the external force is removed, the workpiece will be in a right angle state after springback. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the workpiece being processed and bent.

[0020] Figure 2 This is a schematic diagram of the structure of this technical solution before mold closing.

[0021] Figure 3 This is a schematic diagram of the mold-fixing device.

[0022] Figure 4 This is a cross-sectional view of the mold-fixing device.

[0023] Figure 5 This is a schematic diagram of the moving mold device.

[0024] Figure 6 A schematic diagram of the structure for the cooperation between the push unit and the bending mounting bracket.

[0025] Figure 7 This is one of the cross-sectional views of the moving mold device.

[0026] Figure 8 This is the second sectional view of the moving mold device.

[0027] Figure 9This is a cross-sectional view of the technical solution before mold closing.

[0028] Figure 10 This is a schematic diagram of the structure of this technical solution during mold closing.

[0029] Figure 11 This is a cross-sectional view of the mold when the mold of this technical solution is closed.

[0030] Figure 12 for Figure 11 Enlarged view of point A in the middle.

[0031] Reference numerals: 1. Moving mold device; 11. Moving mold base; 12. Moving mold base; 13. Fixed mold guide post; 14. Moving mold reset component; 15. Moving mold guide post; 16. Fixed mold guide hole; 17. Moving mold guide hole; 2. Fixed mold device; 21. Fixed mold base; 22. Fixed mold base; 3. Bending mechanism; 4. Bending drive assembly; 41. Bending component; 42. Bending mounting base; 421. Slide rail; 5. Flip plate assembly; 51. Flip plate component; 511. Contact surface; 52. Flip plate mounting bracket; 53. Flip plate shaft; 6. Reset assembly 61. Return spring; 7. Propulsion assembly; 71. Propulsion part one; 711. Inclined surface one; 712. Bending mounting bracket; 72. Propulsion part two; 721. Inclined surface two; 73. Return pin; 74. Return spring; 75. Propulsion seat; 76. Return baffle; 8. Unloading assembly; 81. Unloading support part; 811. Protrusion; 82. Unloading support column; 83. Unloading spring; 9. Main frame; 91. Mounting plate; 92. Positioning part; 93. Workpiece; 94. Main body; 95. Bending part; 96. Workpiece support surface. Detailed Implementation

[0032] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0033] like Figures 1-2 As shown, the workpiece 93 to be processed includes a main body 94 and a bending part 95. The bending part 95 is located on one or both sides of the main body 94. The bending part 95 needs to be bent to a position perpendicular to the main body 94. When processing the workpiece 93, the main body 94 is clamped by the mold, and the bending part 95 is bent.

[0034] like Figure 2As shown, the bending die includes a main frame 9, a mounting plate 91, a moving die device 1, and a fixed die device 2. The main frame 9 and the mounting plate 91 are arranged opposite to each other. At least one fixed die device 2 is provided on the main frame 9, and at least one moving die device 1 is provided on the mounting plate 91. The main frame 9 is also provided with a positioning part 92, which is a protrusion and adapted to the shape of the workpiece 93. The workpiece 93 can be placed on the positioning part 92 for positioning. In this embodiment, the die closing direction is vertical. The mounting plate 91 can drive the moving die device 1 to move downwards and approach the fixed die device 2 to complete the die closing, which facilitates subsequent processing.

[0035] like Figure 2-4 As shown, the fixed mold device 2 includes a fixed mold base 21, a fixed mold seat 22, and a blanking assembly 8. Both the fixed mold seat 22 and the blanking assembly 8 are disposed on the fixed mold base 21. Meanwhile, the blanking assembly 8 is movably disposed on the end side of the fixed mold seat 22. The fixed mold seat 22 has a cavity for placing the workpiece 93. The blanking assembly 8 is used to push the processed workpiece 93 out of the cavity for easy handling by personnel.

[0036] Furthermore, the blanking assembly 8 includes a blanking support part 81, a blanking support column 82, and a blanking spring 83. A protrusion 811 is inclinedly provided on the inner side wall of the blanking support part 81, and a sliding groove adapted to the protrusion 811 is provided on the fixed mold base 22. Both the protrusion 811 and the sliding groove are wedge-shaped, which can ensure that the blanking support part 81 will not detach from the fixed mold base 22. When the blanking support part 81 is installed on the fixed mold base 22, the protrusion 811 is placed in the sliding groove to realize the oblique movement of the blanking support part 81. Therefore, the blanking support part 81 can slide along the inclined surface after being subjected to force. The oblique movement can ensure that the blanking support part 81 is disengaged from the bending part 95 of the workpiece 93 during blanking, avoiding damage to the inner surface of the bending part 95 and improving the processing quality of the workpiece 93.

[0037] The blanking support column 82 is movably mounted on the fixed mold base 21. Its upper end movably abuts against the blanking support part 81, and its lower end is mounted inside the fixed mold base 21 via a blanking spring 83. The blanking spring 83 is used to ensure that the blanking support column 82 always has a tendency to move towards the blanking support part 81. There is at least one blanking support column 82. When there are two blanking support columns 82, they can jointly push the blanking support part 81 to move, so that the force on the left and right sides is even, and the wedge-shaped slider and the fixed mold base 22 are not stuck. After the workpiece 93 is processed, the ejection support part can move upward under the action of the ejection spring and push the workpiece 93 out of the cavity for easy blanking.

[0038] like Figure 5As shown, the moving mold device 1 includes a moving mold base 11, a moving mold base 12, and a bending mechanism 3. The moving mold base 12 is disposed on the moving mold base 11, and the bending mechanism 3 is partially disposed on the moving mold base 11 and partially disposed on the moving mold base 12. After the mold is closed, the fixed mold base 22 cooperates with the moving mold base 12 to clamp the main body 94 of the workpiece 93. At this time, the bent part 95 of the workpiece 93 will extend out of the unloading support part 81. As the moving mold base 11 continues to descend, the bending mechanism 3 completes the bending of the bent part 95.

[0039] like Figure 5-7 As shown, the bending mechanism 3 includes a bending drive assembly 4 and a flip plate assembly 5. The bending drive assembly 4 is mounted on the moving mold base 11 and can move up and down with the moving mold base 11. The flip plate assembly 5 is hinged to the end side of the moving mold base 12. The moving mold base 11 can drive the bending drive assembly 4 and the moving mold base 12 to descend. When the mold is in the preparation state, there is a certain distance between the moving mold base 11 and the moving mold base 12. At this time, the moving mold base 11 drives the bending drive assembly 4 and the moving mold base 12 to descend synchronously. During this descent, the moving mold base 12 preferentially contacts the fixed mold base 22. After the mold is closed, the moving mold base 11 can continue to drive the bending drive assembly 4 to descend. During the descent of the bending drive assembly 4, the bending drive assembly 4 moves closer to the flip plate assembly 5. The two work together to bend the workpiece 93. The flip plate assembly 5 fits against the workpiece 93 and bends the workpiece 93 by rotating itself. The bending drive assembly 4 provides rotational power to the flip plate assembly 5. A single power source can drive the bending drive assembly 4 and the moving mold base 12 to descend and work simultaneously, simplifying the processing steps of the workpiece 93 and increasing the processing efficiency of the workpiece 93.

[0040] Furthermore, a fixed mold guide post 13 is provided on the moving mold base 11. The upper end of the fixed mold guide post 13 is set on the moving mold base 11, and the lower end is movably placed in the fixed mold guide hole 16 opened on the fixed mold base 22 for alignment of the moving mold base and the fixed mold base. When the moving mold base 12 descends, the fixed mold guide post 13 enters the fixed mold guide hole 16. A moving mold guide post 15 is provided on the moving mold base 12. The lower end of the moving mold guide post 15 is set on the moving mold base 12, and the upper end is movably placed in the moving mold guide hole 17 opened on the moving mold base 11. Similarly, a matching through hole is also opened on the mounting plate 91. When the moving mold base 11 moves towards the moving mold base 12, the upper end of the moving mold guide post 15 is in the moving mold base 12. The guide hole 17 and the through hole are movable, and the moving mold base 12 is movably mounted on the fixed mold guide post 13; the moving mold base 12 is provided with a moving mold guide post 15, and the moving mold base 11 and the moving mold guide post 15 will move relative to each other; a moving mold reset member 14 is provided between the moving mold base 12 and the moving mold base 11. In this embodiment, the moving mold reset member 14 is a nitrogen spring. The nitrogen spring is a new type of elastic component that uses high-pressure nitrogen as the working medium. It is also a standard part. The upper end of the nitrogen spring is set in the moving mold base 11, and the lower end is movably connected to the moving mold base 12. It is used to reset the moving mold base 12 after it has completed its work, so that the moving mold base 12 moves away from the moving mold base 11.

[0041] like Figure 5-7 As shown, the flip plate assembly 5 includes a flip plate mounting bracket 52, a flip plate shaft 53, a flip plate component 51, and a reset spring 61. The flip plate mounting bracket 52 is mounted on the moving mold base 12 and partially extends out of the moving mold base 12. The purpose of partially extending the flip plate mounting bracket 52 out of the moving mold base 12 is to provide installation space for the flip plate shaft 53 and the flip plate component 51, so that the flip plate component 51 does not interfere with the moving mold base 12 when rotating. The flip plate shaft 53 is inserted into the flip plate mounting bracket 52, and the end of the flip plate component 51 is sleeved on the flip plate shaft 53, so that the flip plate component 51 can rotate around the flip plate shaft 53. The flip plate component 51 has a contact surface 511 that abuts against the bending part 95. This contact surface 511 can be a plane or a groove. It should be noted that the position structure of the flip plate assembly 5 is adapted to the placement position of the workpiece 93, that is, the flip plate component 51 is concentric with the target path of the rotation of the workpiece 93 when rotating.

[0042] When the flip plate 51 is not under force, it will sag due to its own weight. Therefore, a reset spring 61 is provided. The reset spring 61 is used to ensure that the flip plate 51 always has a tendency to rotate in the direction of the bending part 41, so that the flip plate 51 can be reset to the initial state when it is not under force. The initial state here refers to the state in which the workpiece 93 can fit with the bending part 95 after being placed in the cavity, which facilitates the next processing of the workpiece 93. There is at least one reset spring 61. The two ends of the reset spring 61 are connected to the moving mold base 11 and the flip plate 51, respectively. When the flip plate 51 is rotated under force, the reset spring 61 is stretched. When the flip plate 51 is not under force, the reset spring 61 pulls the flip plate 51 back to its original position. In this embodiment, there are two reset springs 61, which are symmetrically arranged on both sides of the flip plate 51.

[0043] like Figure 5-7 As shown, the bending drive assembly 4 also includes a bending mounting base 42, which is disposed on the moving mold base 11, and the bending component 41 is disposed on the bending mounting base 42. After the mold is closed, when the moving mold base 11 drives the bending mounting base 42 to move towards the moving mold base 12, the bending component 41 moves against the flip plate component 51 during the working process and flips it. The bending component 41 can always move against the flip plate component 51 during the working process, providing continuous and stable power for the rotation of the flip plate component 51. The bending component 41 is configured as a roller, and the roller can always abut against the other side of the flip plate component 51 during the descent.

[0044] like Figure 9-12 As shown, the propulsion component 7 is used to improve the problem of insufficient bending angle of workpiece 93 caused by metal springback. The propulsion component 7 can work with the bending drive component 4 and the flip plate component 5 to further bend workpiece 93. In this embodiment, workpiece 93 needs to be bent by 90°, and the propulsion component 7 is used to make the bending angle of workpiece 93 slightly greater than 90°. In actual processing, if the workpiece is bent by 90°, the bending angle will be less than 90° due to metal springback, which will cause processing errors and affect the quality of the workpiece. However, if the workpiece is bent by a bending angle greater than 90°, the bending angle will be exactly 90° after the metal springback phenomenon occurs. The additional bending angle is determined by the workpiece material.

[0045] Specifically, the propulsion assembly 7 includes a first propulsion section 71 and a second propulsion section 72. The first propulsion section 71 is movably mounted on the bending mounting base 42. The bending mounting base 42 has a hollow interior with a slide rail 421. The slide rail 421 is used to accommodate the horizontal movement of the first propulsion section 71 and also ensures that the first propulsion section 71 descends synchronously with the moving mold base 11. The first propulsion section 71 needs to drive the bending component 41 to move synchronously. A bending mounting bracket 712 is provided on the first propulsion section 71, and the bending component 41 is mounted on the bending mounting bracket 712. The two are fitted with a shaft hole. The end side of the first propulsion section 71 has an inclined surface. 711, the second propulsion part 72 is set on the fixed mold base 21. The end side of the second propulsion part 72 has a second inclined surface 721. The positions of the first propulsion part 71 and the second propulsion part 72 are adapted in the vertical direction to ensure that the first inclined surface 711 can abut against the second inclined surface 721 during the descent of the first propulsion part 71. When the first propulsion part 71 descends and abuts against the second propulsion part 72, the bending part 41 can move horizontally towards the flipping part 51 through the interaction of the first inclined surface 711 and the second inclined surface 721. At this time, the flipping part 51 will continue to bend the workpiece 93, so that the bending angle is greater than 90°.

[0046] Furthermore, the propulsion section 71 has a recess that corresponds to the shape of the bending member 41. When the propulsion section 71 moves the bending member 41 horizontally, it can act on the bending member 41 not only through the bending mounting bracket 712, but also through the recess that abuts against the surface of the bending member 41. This increases the force-bearing area of ​​both parts and thus increases the stability of the structure.

[0047] Furthermore, the contact surface 511 of the flip plate 51 is used to fit the outer surface of the workpiece 93, and the outer wall of the unloading support part 81 is the workpiece support surface 96, used to abut against the inner surface of the workpiece 93. Since the workpiece 93 needs to be bent at a greater than 90°, the outer wall of the unloading support part 81 needs to be inclined inward to avoid the flip plate 51. The included angle formed between the workpiece support surface 96 and the top surface of the unloading support part 81 is less than 90°, that is... Figure 12 The angle between the dashed line and the horizontal line is less than 90°.

[0048] Furthermore, since the bending angle of workpiece 93 is greater than 90°, if the bent part 41 is lifted vertically at this time, it will collide with workpiece 93 and cause damage. Therefore, it is necessary to first pull the bent part 41 back to the vertical position before lifting it. The push assembly 7 also includes a push seat 75, a reset pin 73, a reset baffle 76, and a reset spring 74. The push seat 75 is set on the moving mold base 11. The reset pin 73 is telescopically set inside the push seat 75 and passes through the push seat 75 to be fixedly connected to the push part 71. The reset baffle 76 is set at the rear end of the reset pin 73. The return spring 74 is sleeved outside the return pin 73 and located between the return baffle 76 and the push seat 75. The return pin 73 is used to pull the bent part 41 back to the state where it has not been over-bent. The state where it has not been over-bent refers to the state when the bent part 95 is bent at 90°. The return spring 74 is stretched when the bent part 41 is over-bent. When the processing is completed, the push part 1 71 and the push part 2 72 separate. At this time, the return spring 74 will drive the bent part 41 to return to the original position. As the bent part 41 rises, the flip plate 51 is also returned to the original position through the return tension spring 61.

[0049] The working principle of this technical solution is as follows: After the moving mold device 1 of the bending die moves to the fixed mold device 2, it resets to complete one working cycle. In this cycle, the bending of the workpiece 93 is completed. After the workpiece 93 is placed in the cavity, the moving mold base 11 synchronously drives the bending part 41 and the moving mold base 12 to move. The moving mold base 12 first closes with the fixed mold base 22 to clamp the workpiece 93. At this time, the moving mold base 11 continues to drive the bending part 41 to descend. The bending part 41 drives the flip plate part 51 to rotate and bend the bending part 95. If the bending angle does not exceed 90°, the moving mold base 12 continues to drive the bending part 41 to descend. The push part 71 drives the bending part 41 to move towards the fixed mold base 22 and drives the flip plate part 51 to continue rotating. At this time, the bending angle is greater than 90° and the processing is completed. Then, the reset pin 73 drives the bending part 41 to reset. The moving mold base 11 drives the bending part 41 and the moving mold base 12 to rise. During this process, the moving mold reset part 14 works to reset the moving mold base 12. The unloading support part 81 rises obliquely to unload the material.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. A sheet metal bending die, characterized in that, include: The moving mold device (1) includes a moving mold base (11) and a moving mold seat (12) disposed on the moving mold base (11); as well as The fixed mold device (2) includes a fixed mold base (21) and a fixed mold seat (22) disposed on the fixed mold base (21); after the mold is closed, the fixed mold seat (22) cooperates with the moving mold seat (12) to clamp the main body (94) of the workpiece (93); The moving mold device (1) further includes a bending mechanism (3), which is disposed between the moving mold base (11) and the moving mold base (12), and can move along the mold closing direction to bend the bending part (95) of the workpiece (93); The bending mechanism (3) includes: A flap assembly (5), hinged to the moving mold base (12), the flap assembly (5) including a flap member (51) having a contact surface (511) abutting against the bent portion (95); and A bending drive assembly (4) is disposed on the moving mold base (11), the bending drive assembly (4) including a bending element (41); The moving mold base (11) drives the bending part (41) to move toward the flip plate part (51), drives the flip plate part (51) to rotate and realizes the bending of the bending part (95).

2. The sheet metal bending die according to claim 1, characterized in that: The bending drive assembly (4) further includes a bending mounting base (42) disposed on the moving mold base (11), and the bending member (41) is disposed on the bending mounting base (42); After the mold is closed, when the moving mold base (11) drives the bending mounting base (42) to move towards the moving mold base (12), the bending part (41) moves against the flip plate part (51) and flips it over during the working process.

3. The sheet metal bending die according to claim 2, characterized in that, The flap assembly (5) also includes: A flip-plate mounting bracket (52) is mounted on the moving mold base (12); A flap shaft (53) is mounted on the flap mounting bracket (52); and A reset spring (61) is connected at both ends to the moving mold base (11) and the flip plate (51), respectively. The flapper (51) is mounted on the flapper shaft (53), and the reset spring (61) is used to ensure that the flapper (51) always has a tendency to rotate in the direction of the bending member (41).

4. A sheet metal bending die according to claim 3, characterized in that: The bending mechanism (3) further includes a propulsion assembly (7), which contains: A propulsion section (71) is movably disposed within a slide (421) of the bending mounting base (42) and has an inclined surface (711); and The second propulsion section (72) is disposed on the fixed mold base (21) and has a second inclined surface (721) adapted to the first inclined surface (711); The propulsion section (71) is provided with a bending mounting bracket (712), and the bending component (41) is provided on the bending mounting bracket (712) and is movably provided on the propulsion section (71). When the first propulsion unit (71) moves toward the second propulsion unit (72), the first inclined surface (711) and the second inclined surface (721) enable the bending member (41) to move toward the fixed mold base (22) and drive the flip plate member (51) to rotate.

5. A sheet metal bending die according to claim 4, characterized in that, The propulsion assembly (7) also includes: A propulsion seat (75) is disposed on the moving mold base (11); The reset pin (73) is movably disposed within the push seat (75) and passes through the push seat (75) to connect with the push part (71); A reset baffle (76) is disposed on the reset pin (73); and A reset spring (74) is sleeved outside the reset pin (73) and located between the reset baffle (76) and the push seat (75).

6. A sheet metal bending die according to any one of claims 1-5, characterized in that: The fixed mold base (21) is provided with a blanking assembly (8), which includes: The blanking support (81) is movably mounted on the fixed mold base (22); A blanking support column (82) is movably mounted on the fixed mold base (21) and movably abuts against the blanking support part (81); and A feed spring (83) is provided inside the fixed mold base (21) to ensure that the feed support column (82) always tends to move towards the feed support part (81).

7. A sheet metal bending die according to claim 6, characterized in that: The outer side wall of the feeding support (81) is inclined inward, and the angle between the side wall and its top surface is less than 90°. The side wall is the workpiece support surface (96).

8. A sheet metal bending die according to claim 7, characterized in that: The inner wall of the feeding support (81) is provided with a protrusion (811) at an inclination, and the fixed mold base (22) is provided with a sliding groove that matches the protrusion (811). When the blanking support (81) is installed on the fixed mold base (22), the protrusion (811) is placed in the slide groove to realize the oblique movement of the blanking support (81).

9. A sheet metal bending die according to claim 1, characterized in that: A moving mold reset component (14) is provided between the moving mold base (12) and the moving mold base (11).

10. A sheet metal bending die according to claim 1, characterized in that: The moving mold base (11) is provided with a fixed mold guide post (13), the upper end of which is provided on the moving mold base (11), and the lower end is movably placed in the fixed mold guide hole (16) opened on the fixed mold base (22); The moving mold base (12) is provided with a moving mold guide post (15), the lower end of which is provided on the moving mold base (12), and the upper end is movably placed in the moving mold guide hole (17) opened on the moving mold base (11).

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