A stamping device for large negative angle bending

Abstract

This utility model discloses a stamping device for forming large negative angle bends, relating to the field of stamping technology. It includes a base, with support beams fixedly connected to the four corners of the upper end of the base. A top plate is fixedly connected to the upper end of each support beam. A hydraulic cylinder is fixedly installed on the upper end of the top plate. The output end of the hydraulic cylinder passes through the upper end of the top plate and is fixedly connected to an upper die holder. A bending block is fixedly connected to the lower end of the upper die holder. Extrusion wedges are fixedly connected to the left and right sides of the bending block at the lower end of the upper die holder. A lower die holder is fixedly connected to the upper end of the base. This utility model uses a motor to drive a bidirectional screw to rotate, causing the forming blocks to move away from each other during demolding. This increases the distance between the two forming blocks during demolding, reduces friction between the forming blocks and the sheet metal, and reduces damage to the sheet metal surface. It also reduces the demolding difficulty of large negative angle bends, helping to improve production efficiency and product qualification rate.

Description

Technical Field

[0001] This utility model relates to the field of stamping technology, specifically to a stamping device for forming large negative angle bending. Background Technology

[0002] In the field of stamping, bending is a common processing technology. Large negative angle bending refers to bending sheet metal at a large negative angle. This bending process has important applications in the processing of some special structural parts.

[0003] In the process of forming large negative angle bends, existing stamping devices often suffer from frictional damage to the sheet metal surface during demolding due to the high friction between the forming block and the sheet metal. Furthermore, the large bending depth and small opening size of the lower die for large negative angle bends result in high resistance during demolding, further increasing the difficulty of demolding and affecting processing efficiency and product quality. Therefore, a stamping device for forming large negative angle bends is proposed to solve the problems mentioned above. Utility Model Content

[0004] To address the aforementioned technical problems, a stamping device for large negative angle bending is provided. This technical solution solves the problem mentioned in the background art that existing stamping devices, during the large negative angle bending process, are prone to frictional damage to the surface of the sheet metal during demolding due to the large friction between the forming block and the sheet metal. Furthermore, the large bending depth and small opening size of the lower die for large negative angle bending result in greater resistance during demolding, further increasing the difficulty of demolding and thus affecting processing efficiency and product quality.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A stamping device for large negative angle bending forming includes a base. Support beams are fixedly connected to the four corners of the upper end of the base. A top plate is fixedly connected to the upper end of each support beam. A hydraulic cylinder is fixedly installed on the upper end of the top plate. The output end of the hydraulic cylinder passes through the upper end of the top plate and is fixedly connected to an upper die holder. A bending block is fixedly connected to the lower end of the upper die holder. Extrusion wedges are fixedly connected to both sides of the bending block at the lower end of the upper die holder. A lower die holder is fixedly connected to the upper end of the base. A first groove is formed at the upper end of the lower die holder, and a second groove is formed at the lower end of the first groove. The inner sliding connection of a slide groove includes two symmetrically distributed forming blocks. Each of the two forming blocks has a forming groove at one of its opposite ends. Each of the two forming blocks has a sliding inclined block fixedly connected to one of its opposite ends. The lower end of the sliding inclined block has a third slide groove. A guide rod is fixedly connected inside the third slide groove. A pull block is slidably connected to the outer surface of the guide rod. A first spring is fixedly connected between the pull block and the inner wall of the third slide groove near the forming block. A bidirectional screw is rotatably connected inside the second slide groove. Both pull blocks are threaded to the outer surface of the bidirectional screw.

[0007] Preferably, a motor for driving the bidirectional screw rotation is fixedly installed at the right end of the lower mold base.

[0008] Preferably, the upper end of the lower mold base is fixedly connected to the left and right sides of the first slide groove, and the ends of the two sliding blocks that are far apart from each other are fixedly connected to the guide posts. The other ends of the two guide posts pass through the opposite ends of the two fixed plates and are fixedly connected to the limit seats. A second spring is fixedly connected between the limit seats and the fixed plates.

[0009] Preferably, limit rods are fixedly connected to the four corners of the upper end of the lower mold base, the upper end of the limit rods is fixedly connected to the lower end of the top plate, and the upper mold base is slidably connected to the outer surface of the limit rods.

[0010] Preferably, the upper end of the molded block is provided with a placement groove.

[0011] The advantages of this utility model compared with the prior art are:

[0012] This solution proposes a stamping device for forming large negative angle bends. By driving a bidirectional screw to rotate via a motor, the forming blocks are moved away from each other during demolding, increasing the distance between the two forming blocks during demolding, reducing friction between the forming blocks and the sheet metal, reducing damage to the sheet metal surface, and also reducing the demolding difficulty of large negative angle bends, which helps to improve production efficiency and product qualification rate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2This is a front view of the present invention;

[0015] Figure 3 This is a schematic diagram of the structure of the lower mold base in this utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the lower mold base in this utility model.

[0017] The numbers on the map are:

[0018] 1. Base; 2. Support beam; 3. Top plate; 4. Lower mold base; 5. Upper mold base; 6. Bending block; 7. Hydraulic cylinder; 8. Extrusion inclined block; 9. First slide groove; 10. Second slide groove; 11. Forming block; 12. Forming groove; 13. Sliding inclined block; 14. Third slide groove; 15. Guide rod; 16. Pull block; 17. First spring; 18. Bidirectional screw; 19. Motor; 20. Fixing plate; 21. Guide column; 22. Limiting seat; 23. Second spring; 24. Limiting rod; 25. Placement groove. Detailed Implementation

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0020] Reference Figures 1-4 As shown, a stamping device for large negative angle bending includes a base 1. Support beams 2 are fixedly connected to the four corners of the upper end of the base 1. A top plate 3 is fixedly connected to the upper end of the support beams 2. A hydraulic cylinder 7 is fixedly installed on the upper end of the top plate 3. The output end of the hydraulic cylinder 7 passes through the upper end of the top plate 3 and is fixedly connected to an upper die base 5. A bending block 6 is fixedly connected to the lower end of the upper die base 5. Extrusion inclined blocks 8 are fixedly connected to both the left and right sides of the bending block 6 at the lower end of the upper die base 5. A lower die base 4 is fixedly connected to the upper end of the base 1. A first groove 9 is formed at the upper end of the lower die base 4, and a second groove 10 is formed at the lower end of the first groove 9. The internal sliding connection has two symmetrically distributed molding blocks 11. Each molding block 11 has a molding groove 12 at one of its opposite ends. Each molding block 11 has a sliding inclined block 13 fixedly connected at one of its far ends. The lower end of the sliding inclined block 13 has a third sliding groove 14. A guide rod 15 is fixedly connected inside the third sliding groove 14. A pull block 16 is slidably connected to the outer surface of the guide rod 15. A first spring 17 is fixedly connected between the pull block 16 and the inner wall of the third sliding groove 14 near the molding block 11. A bidirectional screw 18 is rotatably connected inside the second sliding groove 10. Both pull blocks 16 are threaded to the outer surface of the bidirectional screw 18.

[0021] Furthermore, the upper end of the forming block 11 is provided with a placement groove 25, which is used to place the sheet material to be processed, so that the sheet material can be stably positioned during the processing and facilitate bending and forming.

[0022] Furthermore, the upper end of the lower mold base 4 is fixedly connected to the left and right sides of the first slide groove 9 with fixed plates 20. The two sliding inclined blocks 13 are fixedly connected to the opposite ends with guide posts 21. The other ends of the two guide posts 21 pass through the opposite ends of the two fixed plates 20 and are fixedly connected to limit seats 22. The limit seats 22 and the fixed plates 20 are fixedly connected with a second spring 23.

[0023] Furthermore, limit rods 24 are fixedly connected to the four corners of the upper end of the lower mold base 4. The upper end of the limit rods 24 is fixedly connected to the lower end of the top plate 3. The upper mold base 5 is slidably connected to the outer surface of the limit rods 24. The limit rods 24 are used to guide and limit the up and down movement of the upper mold base 5 to ensure the smoothness of the movement of the upper mold base 5 and the accuracy of the docking.

[0024] Furthermore, the initial position of the forming block 11 is the same as its position during the forming process. The hydraulic cylinder 7 is used to drive the upper die base 5 to move up and down to achieve the stamping action. After the sheet material to be processed is placed in the placement groove 25, when the hydraulic cylinder 7 is started to drive the upper die base 5 to move downward, the bending block 6 will first contact the sheet material. Under the squeezing action of the bending block 6, the sheet material moves into the forming groove 12 between the two forming blocks 11. At this time, the two forming blocks 11 are squeezed to move outward. As the upper die base 5 continues to move downward, the two squeezing inclined blocks 8 at the lower end of the upper die base 5 will disengage from the sliding inclined block 13. By contacting the inclined surface of the squeezing inclined block 8 with the sliding inclined block 13 and applying pressure, the sliding inclined block 13 is pushed to move inward, which can drive the two forming blocks 11 to shrink inward, thereby squeezing the sheet material. Through the combined action of the bending block 6 and the forming groove 12, the sheet material is bent into the target shape.

[0025] Furthermore, a motor 19 for driving the bidirectional screw 18 to rotate is fixedly installed at the right end of the lower mold base 4.

[0026] Furthermore, in the initial state, the two pull blocks 16 are tightly attached to the inner walls of the two third slide grooves 14 on opposite sides. After the sheet is bent and formed, the hydraulic cylinder 7 will drive the upper mold base 5 to move upward for demolding. During this process, the extrusion inclined block 8 and the sliding inclined block 13 gradually separate. At this time, the motor 19 drives the bidirectional screw 18 to rotate, so that the two pull blocks 16 move away from each other, which can pull the two forming blocks 11 away from each other, thereby increasing the distance between the two forming blocks 11, thereby reducing the frictional damage to the sheet surface caused by the forming blocks 11 during demolding, and reducing the demolding difficulty of large negative angle bending.

[0027] Working Principle: When using this device, first place the sheet material to be processed in the placement groove 25 at the upper end of the forming block 11. Then, start the hydraulic cylinder 7. The output end of the hydraulic cylinder 7 drives the upper die base 5 to move downward. The upper die base 5 drives the bending block 6 and the extrusion inclined block 8 to move downward together. The bending block 6 first contacts the sheet material. Under the extrusion action of the bending block 6, the sheet material moves into the forming groove 12 between the two forming blocks 11. At this time, the two forming blocks 11 are subjected to the extrusion force of the sheet material and move outward. The sliding inclined block 13 also moves outward accordingly. As the upper die base 5 continues to move downward, the extrusion inclined block 8 at the lower end of the upper die base 5 contacts the sliding inclined block 13. Through the cooperation of the inclined surface of the extrusion inclined block 8 and the inclined surface of the sliding inclined block 13, the extrusion inclined block 8 exerts pressure on the sliding inclined block 13. Block 13 applies inward pressure, pushing the sliding inclined block 13 to move inward, thereby causing the two forming blocks 11 to contract inward. The forming groove 12 on the forming block 11 works together with the bending block 6 to squeeze the sheet material, bending it into the target shape. After the sheet material is bent into shape, the hydraulic cylinder 7 drives the upper mold base 5 to move upward for demolding. The extrusion inclined block 8 and the sliding inclined block 13 gradually separate. At this time, the start motor 19 drives the bidirectional screw 18 to rotate. The two pulling blocks 16 move away from each other under the drive of the bidirectional screw 18, pulling the sliding inclined block 13 and the forming block 11 away from each other, increasing the distance between the two forming blocks 11, reducing the frictional damage to the sheet material surface caused by the forming block 11 during demolding, and reducing the demolding difficulty of large negative angle bending.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A press device for large negative angle bending forming, characterized by, The system includes a base (1), with support beams (2) fixedly connected to the four corners of the upper end of the base (1). A top plate (3) is fixedly connected to the upper end of the support beams (2). A hydraulic cylinder (7) is fixedly installed on the upper end of the top plate (3). The output end of the hydraulic cylinder (7) passes through the upper end of the top plate (3) and is fixedly connected to an upper mold base (5). A bending block (6) is fixedly connected to the lower end of the upper mold base (5). Extrusion inclined blocks (8) are fixedly connected to the left and right sides of the bending block (6) at the lower end of the upper mold base (5). A lower mold base (4) is fixedly connected to the upper end of the base (1). A first sliding groove (9) is opened at the upper end of the lower mold base (4). A second sliding groove (10) is opened at the lower end of the first sliding groove (9). Two sliding connections are made inside the first sliding groove (9). The two molding blocks (11) are symmetrically distributed. Each molding block (11) has a molding groove (12) at one end opposite to the other. Each molding block (11) is fixedly connected to a sliding inclined block (13) at one end away from the other. The lower end of the sliding inclined block (13) has a third sliding groove (14). A guide rod (15) is fixedly connected inside the third sliding groove (14). A pull block (16) is slidably connected to the outer surface of the guide rod (15). A first spring (17) is fixedly connected between the pull block (16) and the inner wall of the third sliding groove (14) near the molding block (11). A bidirectional screw (18) is rotatably connected inside the second sliding groove (10). Both pull blocks (16) are threaded to the outer surface of the bidirectional screw (18).

2. A press apparatus for large negative angle bending forming according to claim 1, characterized in that: The lower mold base (4) is fixedly equipped with a motor (19) for driving the bidirectional screw (18) to rotate.

3. The stamping apparatus for large negative angle bending forming according to claim 1, wherein: The upper end of the lower mold base (4) is fixedly connected to the left and right sides of the first slide groove (9) with fixed plates (20). The two sliding inclined blocks (13) are fixedly connected to the opposite ends with guide posts (21). The other ends of the two guide posts (21) pass through the opposite ends of the two fixed plates (20) and are fixedly connected to limit seats (22). The limit seats (22) and the fixed plates (20) are fixedly connected with a second spring (23).

4. The stamping apparatus for large negative angle bending forming according to claim 1, wherein: Limiting rods (24) are fixedly connected to the four corners of the upper end of the lower mold base (4). The upper end of the limiting rod (24) is fixedly connected to the lower end of the top plate (3). The upper mold base (5) is slidably connected to the outer surface of the limiting rod (24).

5. The stamping apparatus for large negative angle bending forming according to claim 1, wherein: The upper end of the molding block (11) is provided with a placement groove (25).

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