A steel sheet punching and bending device

Abstract

The utility model discloses a kind of steel sheet stamping bending devices, it is related to steel sheet processing technical field, including device main body, stamping mechanism and two reset mechanisms, the top of device main body is fixedly connected with workbench, stamping mechanism is installed above workbench, the output end of stamping mechanism is connected with upper die plate, the bottom of upper die plate is fixedly connected with two mounting brackets that are left and right symmetrical arrangement, the inside of two mounting brackets is rotatably connected with shaft, the outside of shaft is fixedly connected with pressure block, and pressure block is rotatably connected in the inside of mounting bracket, the top of workbench is fixedly connected with lower die, the bottom of pressure block is provided with right-angle groove body structure, and the right-angle groove body structure of two pressure blocks is respectively matched between the two right angles of lower die, reset mechanism is installed between pressure block and mounting bracket. Two times vertical bending are completed by the rotary extrusion of pressure block and die in the device, material tearing is avoided, and reset mechanism drives pressure block to reset automatically, compression spring pushes top block to realize automatic demoulding.

Description

Technical Field

[0001] This utility model relates to the field of steel sheet processing technology, specifically to a steel sheet stamping and bending device. Background Technology

[0002] In the field of steel parts manufacturing, stamping and bending are key processes for forming structures with specific angles. With industrial development, the demand for thin-walled steel sheet components, such as brackets and shells, is increasing. These components often require precise multi-angle bending. Currently, the industry generally uses die stamping to plastically form steel sheets.

[0003] There is a common type of stamping and bending device that completes bending by direct stamping between the upper and lower dies. A typical technical solution is to use a hydraulic or pneumatic drive device to drive the upper die plate with the punch installed to move downwards, and cooperate with the lower die cavity fixed on the worktable to stamp the steel sheet placed between them in one pass.

[0004] However, the aforementioned existing technologies have significant shortcomings in practical applications. First, for complex structures that require two consecutive 90° bends, the traditional direct stamping method causes the material to be subjected to severe tensile stress in the bending corner area, which can easily lead to tearing or cracking of thin steel sheets. Second, after stamping, the formed workpiece is prone to tightly fitting with the mold cavity due to residual stress, making demolding difficult. If it is forcibly ejected, it may damage the surface of the workpiece or its dimensional accuracy. These factors together restrict product quality and production efficiency, resulting in a high scrap rate.

[0005] Based on this, the present invention designs a steel sheet stamping and bending device to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a steel sheet stamping and bending device.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A steel sheet stamping and bending device includes a main body, a stamping mechanism, and two reset mechanisms. A workbench is fixedly connected to the top of the main body. The stamping mechanism is installed above the workbench. An upper template is connected to the output end of the stamping mechanism. Two mounting brackets arranged symmetrically to the left and right are fixedly connected to the bottom of the upper template. A rotating shaft is rotatably connected to the inner side of each mounting bracket. A pressure block is fixedly connected to the outer side of the rotating shaft and rotatably connected to the inner side of the mounting bracket. A lower die is fixedly connected to the top of the workbench. A right-angled groove structure is formed at the bottom of the pressure block, and the right-angled groove structures of the two pressure blocks are respectively matched with the two right angles of the lower die. The reset mechanisms are installed between the pressure block and the mounting bracket.

[0008] Furthermore, the stamping mechanism includes guide rods, mounting plates, and cylinders. Multiple guide rods are fixedly connected to the four corners of the top of the workbench. The mounting plate is fixedly connected between the tops of the multiple guide rods. The cylinder is fixedly connected to the top center of the mounting plate, and the upper template is fixedly connected to the output end of the cylinder.

[0009] Furthermore, the tops of multiple guide rods slide through the upper template.

[0010] Furthermore, the reset mechanism includes a first connecting shaft, a second connecting shaft, and a tension spring. The first connecting shaft is rotatably connected to the top of the outer side wall of the mounting bracket, the second connecting shaft is rotatably connected to the outer side wall of the pressure block, and the tension spring is fixedly connected between the first connecting shaft and the second connecting shaft, and the tension spring is always in a stretched state.

[0011] Furthermore, a backing plate is fixedly connected to the inner side of the mounting bracket, and the outer wall of the outer end of the pressure block abuts against the bottom surface of the backing plate.

[0012] Furthermore, two mounting slots are respectively opened on the top sides of the lower mold in a symmetrical arrangement. Bolts are threaded onto the bottom walls of the two mounting slots, and a first connecting plate is fixedly connected to the top of each bolt.

[0013] Furthermore, a telescopic rod is fixedly connected to the top of the first connecting plate, and a second connecting plate is fixedly connected to the top of the telescopic rod. A compression spring is fixedly connected between the top surface of the first connecting plate and the bottom surface of the second connecting plate. A top block is fixedly connected to the top of the second connecting plate, and the top of the top block protrudes to the outer side of the top surface of the lower mold.

[0014] Furthermore, a PLC processor is fixedly connected to the outside of the main body of the device, the cylinder is connected to an external air supply device, and the PLC processor is communicatively connected to the external air supply unit.

[0015] Compared with the prior art, the advantages of this utility model are as follows: 1. This steel sheet stamping and bending device uses the rotational extrusion of the pressure block and the lower die to make the steel sheet undergo gradual bending rather than instantaneous stamping during the forming process. This flexible bending method can effectively disperse the internal stress of the material and significantly reduce the risk of tearing or cracking at the bending corner of the thin-walled steel sheet, thereby greatly improving the product yield and reducing material waste.

[0016] 2. This steel sheet stamping and bending device utilizes a spring-loaded energy storage ejection design to automatically and smoothly lift the formed workpiece upwards after stamping. This non-forced demolding method avoids rigid separation between the workpiece and the mold, preventing scratches and deformation on the workpiece surface and reducing wear on the mold itself, thus ensuring the stability of processing quality and the service life of the mold. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of a steel sheet stamping and bending device according to the present invention; Figure 2 This is a second perspective view of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a third perspective view of the present invention; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 This is a partial structural front sectional view of the present invention; Figure 7 for Figure 6 A magnified view of point C in the middle.

[0019] The labels in the diagram represent: 1. Main body of the device; 2. Workbench; 3. Guide rod; 4. Mounting plate; 5. Cylinder; 6. Upper template; 7. Mounting frame; 8. Rotating shaft; 9. Pressure block; 10. First connecting shaft; 11. Second connecting shaft; 12. Tension spring; 13. Support plate; 14. Lower mold; 15. Mounting groove; 16. First connecting plate; 17. Telescopic rod; 18. Second connecting plate; 19. Compression spring; 20. Top block; 21. Bolt; 22. PLC processor. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-7 A steel sheet stamping and bending device includes a device body 1, a stamping mechanism, and two symmetrical reset mechanisms. The device body 1 serves as the basic support structure for the entire device, and its robust frame design provides a stable installation platform for each functional component. A workbench 2 is fixedly connected to the top of the device body 1. The flat surface of the workbench 2, which has been precision machined, provides a reliable reference plane for the stamping operation.

[0022] The stamping mechanism is mounted above the worktable 2. The mechanism includes guide rods 3, a mounting plate 4, and a cylinder 5. Multiple guide rods 3 are fixedly connected to the four corners of the top of the worktable 2. Their high-precision linear guide characteristics ensure stable operation of the moving parts. The mounting plate 4 is fixedly connected between the tops of the multiple guide rods 3. This structure serves as the mounting base for the power element, and its rigid design effectively distributes the working load. The output end of the stamping mechanism is connected to an upper template 6. The cylinder 5 is fixedly connected to the top center of the mounting plate 4, and the upper template 6 is fixedly connected to the output end of the cylinder 5. The tops of the multiple guide rods 3 slide through the upper template 6. This connection method ensures that the upper template 6 can move precisely vertically along the guide rods 3 under the drive of the cylinder 5.

[0023] Two mounting brackets 7 arranged side-by-side are fixedly connected to the bottom of the upper template 6. These mounting brackets 7 serve as the support structure for the pressure block 9, and their symmetrical arrangement ensures balanced force distribution. The inner sides of the two mounting brackets 7 are rotatably connected to the rotating shafts 8, and the outer sides of the rotating shafts 8 are fixedly connected to the pressure block 9. The pressure block 9 is rotatably connected to the inner side of the mounting brackets 7. This ingenious design allows the pressure block 9 to rotate, providing the necessary degrees of freedom of movement for the bending process. The top of the workbench 2 is fixedly connected to the lower mold 14, which has a convex-shaped structure. The bottom of the pressure block 9 has a right-angled groove structure, and the right-angled groove structures of the two pressure blocks 9 are matched with the two right angles of the lower mold 14. This matching relationship is a key technical feature for achieving precise bending of the steel sheet.

[0024] In this embodiment, a reset mechanism is installed between the pressure block 9 and the mounting frame 7. The reset mechanism includes a first connecting shaft 10, a second connecting shaft 11, and a tension spring 12. The first connecting shaft 10 is rotatably connected to the top of the outer side wall of the mounting frame 7, the second connecting shaft 11 is rotatably connected to the outer side wall of the pressure block 9, and the tension spring 12 is fixedly connected between the first connecting shaft 10 and the second connecting shaft 11. The tension spring 12 is always in a stretched state. This design ensures that the pressure block 9 can automatically return to its initial position after bending. A stop plate 13 is fixedly connected to the inner side of the mounting frame 7, and the outer wall of the outer end of the pressure block 9 abuts against the bottom surface of the stop plate 13. The stop plate 13 serves as a limiting device for the pressure block 9, precisely controlling the initial position of the pressure block 9.

[0025] In this embodiment, two symmetrically arranged mounting slots 15 are respectively opened on the top sides of the lower mold 14. Bolts 21 are threaded onto the bottom walls of both mounting slots 15, and a first connecting plate 16 is fixedly connected to the top of each bolt 21. This detachable connection design facilitates mold replacement and maintenance. A telescopic rod 17 is fixedly connected to the top of the first connecting plate 16, and a second connecting plate 18 is fixedly connected to the top of the telescopic rod 17. A compression spring 19 is fixedly connected between the top surface of the first connecting plate 16 and the bottom surface of the second connecting plate 18. The compression spring 19 is sleeved on the outside of the telescopic rod 17. A top block 20 is fixedly connected to the top of the second connecting plate 18, and the top of the top block 20 protrudes to the outside of the top surface of the lower mold 14. This elastic ejection structure can automatically lift the workpiece after stamping, effectively solving the problem of workpiece adhesion.

[0026] In this embodiment, a PLC processor 22 is fixedly connected to the outside of the main body 1 of the device, the cylinder 5 is connected to the external air supply equipment, and the PLC processor 22 is communicatively connected to the external air supply unit. This control system realizes the automation and precise control of the equipment operation.

[0027] When the steel sheet stamping and bending device is in operation, the cylinder 5 drives the upper template 6 to press down vertically along the guide rod 3. The two symmetrical mounting brackets 7 installed at the bottom of the upper template 6 move accordingly, causing the pressure block 9 on its inner side to contact the workpiece. The right-angle groove structure specially designed at the bottom of the pressure block 9 matches the corresponding contour of the lower mold 14 during the movement. During this process, the pressure block 9 can rotate adaptively around the rotating shaft 8, so that its right-angle groove structure precisely engages with the protrusion on the lower mold 14, thereby achieving two consecutive 90° rotational extrusion bending of the steel sheet placed therein. This unique rotational extrusion forming method effectively avoids the steel sheet tearing problem that is easily caused by traditional direct stamping and bending, and significantly reduces the scrap rate.

[0028] During the bending process, the second connecting shaft 11 connected to the pressure block 9 will move accordingly and stretch the tension spring 12 to store energy; when the stamping and bending process is completed and the cylinder 5 rotates in the reverse direction to retract, the restoring force of the tension spring 12 will pull the pressure block 9 to reset and rotate until the outer wall of the outer end of the pressure block 9 abuts against the inner side of the mounting bracket 7, preparing for the next stamping operation. Meanwhile, during the pressing process of the pressure block 9, the steel sheet will push the top block 20 on the lower mold 14 downward, forcing the second connecting plate 18 at the bottom of the top block 20 to compress the compression spring 19. When the upper mold returns, the compressed compression spring 19 releases its stored energy and automatically ejects the formed steel sheet through the top block 20, effectively preventing the workpiece from sticking to the lower mold 14 and achieving reliable automatic demolding. In addition, by loosening the bolts 21 in the mounting slot 15, the first connecting plate 16 and above ejection mechanisms can be easily disassembled for maintenance or replacement, greatly improving the maintainability of the equipment.

[0029] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A steel sheet stamping and bending device, comprising a device body (1), characterized in that: It also includes a stamping mechanism and two reset mechanisms. The top of the main body (1) of the device is fixedly connected to a workbench (2). The stamping mechanism is installed above the workbench (2). The output end of the stamping mechanism is connected to an upper template (6). The bottom of the upper template (6) is fixedly connected to two mounting brackets (7) arranged symmetrically on the left and right. The inner side of the two mounting brackets (7) is rotatably connected to a rotating shaft (8). The outer side of the rotating shaft (8) is fixedly connected to a pressure block (9). The pressure block (9) is rotatably connected to the inner side of the mounting bracket (7). The top of the workbench (2) is fixedly connected to a lower mold (14). The bottom of the pressure block (9) is provided with a right-angle groove structure. The right-angle groove structures of the two pressure blocks (9) are respectively matched with the two right angles of the lower mold (14). The reset mechanism is installed between the pressure block (9) and the mounting bracket (7).

2. The steel sheet stamping and bending device according to claim 1, characterized in that, The stamping mechanism includes guide rods (3), mounting plate (4) and cylinder (5). Multiple guide rods (3) are fixedly connected to the four corners of the top of the workbench (2). The mounting plate (4) is fixedly connected between the tops of multiple guide rods (3). The cylinder (5) is fixedly connected to the top center of the mounting plate (4). The upper template (6) is fixedly connected to the output end of the cylinder (5).

3. The steel sheet stamping and bending device according to claim 2, characterized in that, The tops of the multiple guide rods (3) slide through the upper template (6).

4. The steel sheet stamping and bending device according to claim 1, characterized in that, The reset mechanism includes a first connecting shaft (10), a second connecting shaft (11), and a tension spring (12). The first connecting shaft (10) is rotatably connected to the top of the outer side wall of the mounting bracket (7), the second connecting shaft (11) is rotatably connected to the outer side wall of the pressure block (9), and the tension spring (12) is fixedly connected between the first connecting shaft (10) and the second connecting shaft (11), and the tension spring (12) is always in a stretched state.

5. The steel sheet stamping and bending device according to claim 1, characterized in that, The mounting bracket (7) is fixedly connected to the inner side of the abutment plate (13), and the outer wall of the outer end of the pressure block (9) abuts against the bottom surface of the abutment plate (13).

6. The steel sheet stamping and bending device according to claim 1, characterized in that, The lower mold (14) has two mounting slots (15) arranged symmetrically on the top sides. Bolts (21) are threaded onto the bottom walls of the two mounting slots (15), and a first connecting plate (16) is fixedly connected to the top of each bolt (21).

7. The steel sheet stamping and bending device according to claim 6, characterized in that, A telescopic rod (17) is fixedly connected to the top of the first connecting plate (16), and a second connecting plate (18) is fixedly connected to the top of the telescopic rod (17). A compression spring (19) is fixedly connected between the top surface of the first connecting plate (16) and the bottom surface of the second connecting plate (18). A top block (20) is fixedly connected to the top of the second connecting plate (18), and the top of the top block (20) protrudes to the outside of the top surface of the lower mold (14).

8. The steel sheet stamping and bending device according to claim 2, characterized in that, The main body (1) of the device is externally fixedly connected to a PLC processor (22), the cylinder (5) is connected to an external air supply device, and the PLC processor (22) is communicatively connected to an external air supply unit.

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