Multi-step progressive bending die
By designing a multi-step progressive bending die, a stepper motor and hydraulic cylinder are used to break down large-angle bending into multiple small-angle bending. The movement of the sheet metal parts is restricted by a limiting mechanism, which solves the springback problem during the bending process and improves processing accuracy and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN SHENGKANG METAL PROD CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-06-30
AI Technical Summary
Existing sheet metal bending dies are prone to springback during single large-angle bending, resulting in a large deviation between the bending angle and the design angle, which affects processing accuracy and efficiency.
A multi-step progressive bending die is used, which is driven by a stepper motor and a lead screw and hydraulic cylinder to break down large-angle bending into multiple small-angle bending. A limiting mechanism is used to restrict the movement and deformation of the sheet metal parts to ensure bending accuracy.
It effectively reduces the impact of springback, improves the accuracy of bending angles and dimensions, enhances processing and forming capabilities, and ensures the consistency and uniformity of bending angles.
Smart Images
Figure CN224423885U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sheet metal bending technology, and more specifically, to a multi-step progressive bending die. Background Technology
[0002] Sheet metal parts of industrial control chassis are the core components that make up the outer shell and internal support structure of industrial control chassis. They are made by metal sheet processing technology (such as cutting, bending, stamping, welding, etc.). They not only provide physical protection, but also undertake functions such as heat dissipation, electromagnetic shielding, and modular installation. They are the key foundation for industrial control equipment to adapt to harsh industrial environments.
[0003] In the process of bending sheet metal parts, bending dies are usually used. When the upper die presses downward, the sheet metal part enters the interior of the lower die, thereby completing the bending of the sheet metal part. However, after bending, some sheet metal parts will be tightly attached to the lower die, requiring the use of other tools to remove them, which increases the intensity of manual labor and reduces production efficiency.
[0004] A search revealed that Chinese patent CN221909208U discloses a sheet metal bending die. The output end of a hydraulic cylinder causes a mounting plate to move downwards, which in turn moves the upper die downwards. The upper die presses down into the inner cavity of the lower die, causing the sheet metal to begin bending. Through the setting of the drive component, the second bevel gear rotates, which in turn drives the internal threaded cylinder to rotate. The threaded rod is threadedly connected to the internal threaded cylinder. While the internal threaded cylinder rotates, the threaded rod moves upwards, which in turn drives the push rod to move upwards, causing the push plate to move out of the groove and push the sheet metal upwards, thus pushing out the sheet metal formed in the lower die, making it easy to remove the sheet metal.
[0005] When the above-mentioned sheet metal bending die is used to bend the sheet metal parts, a single large-angle bend is adopted. After bending, there will be obvious springback, resulting in a large deviation between the actual bending angle and the design angle, which will affect the bending effect. Utility Model Content
[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a multi-step progressive bending die to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A multi-step progressive bending die includes a base, a lower die fixedly connected to the top of the base, a bending assembly mounted on the base, and a limit mechanism mounted on the lower die.
[0009] The bending assembly includes a stepper motor, with a lead screw fixedly connected to the output end of the stepper motor. The lead screw is rotatably connected to the inside of the base. A movable frame is threadedly connected to the outside of the lead screw. A hydraulic cylinder is fixedly connected to the top of the movable frame. A movable plate is fixedly connected to the output end of the hydraulic cylinder. Two guide columns are slidably connected inside the movable plate. A fixed plate is fixedly connected to the bottom end of the guide columns. The fixed plate is fixedly connected to one side of the movable frame. A first lower pressure plate is fixedly connected to the bottom end of the movable plate. A second lower pressure plate is provided on one side of the first lower pressure plate. A third lower pressure plate is provided on one side of the second lower pressure plate. Both the second and third lower pressure plates are fixedly connected to the bottom end of the movable plate. A connecting plate is fixedly connected to one side of the movable frame. A first inclined plate is fixedly connected to the top of the connecting plate. A second inclined plate is provided on one side of the first inclined plate. The cross-section of the second inclined plate matches the cross-section of one side of the first lower pressure plate. The cross-section of one side of the first inclined plate matches the cross-section of one side of the second lower pressure plate.
[0010] By adopting the above technical solution, multiple progressive bends can be achieved on sheet metal parts, decomposing large-angle bends into multiple small-angle bends, thereby enhancing the forming ability of sheet metal parts by bending.
[0011] As a further description of the above technical solution: the limiting mechanism includes a fixed frame, the fixed frame is fixedly connected to the top of the lower mold, a cylinder is installed at the top of the fixed frame, a limiting plate is fixedly connected to the output end of the cylinder, and multiple protective strips are fixedly connected to the bottom end of the limiting plate.
[0012] By adopting the above technical solution, the sheet metal parts can be effectively limited during bending, which can restrict the movement and deformation of the sheet metal parts during the bending process, thereby improving the consistency of bending angle.
[0013] The technical effects and advantages of this utility model are as follows:
[0014] 1. By setting up a bending component, compared with the existing technology, multiple movements of the movable frame and multiple presses of the movable plate can achieve multiple progressive bending of sheet metal parts, making the deformation of each bend smaller, thereby effectively reducing the impact of springback on bending accuracy, improving the accuracy of bending angle and size, and enhancing the forming ability of bending processing.
[0015] 2. By setting a limiting mechanism, compared with the existing technology, the sheet metal parts can be limited on the lower mold by pressing down the limiting plate. This can restrict the movement and deformation of the sheet metal parts during the bending process, so that the bending force is evenly applied to the sheet metal parts, thereby ensuring the consistency of the bending angle. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0017] Figure 2 This is a schematic diagram of the rear structure of the base of this utility model.
[0018] Figure 3 This is a schematic cross-sectional view of the movable frame structure of this utility model.
[0019] Figure 4 This is a partial structural diagram of the connection point of the connecting plate of this utility model.
[0020] Figure 5 This is a schematic diagram of the guide column structure of this utility model.
[0021] Figure 6 This is a partial structural diagram of the lower mold connection of this utility model.
[0022] Figure 7 This is a partial structural diagram of the connection point of the movable plate of this utility model.
[0023] The attached diagram is labeled as follows: 1. Base; 2. Lower mold; 3. Stepper motor; 4. Lead screw; 5. Movable frame; 6. Hydraulic cylinder; 7. Movable plate; 8. Guide column; 9. Fixed plate; 10. First lower pressure plate; 11. Second lower pressure plate; 12. Third lower pressure plate; 13. Connecting plate; 14. First inclined plate; 15. Second inclined plate; 16. Fixed frame; 17. Cylinder; 18. Limiting plate; 19. Protective strip. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] The embodiments disclosed in this application are as follows: Figure 1-6 The multi-step progressive bending die shown includes a base 1, a lower die 2 fixedly connected to the top of the base 1, a bending assembly installed on the base 1, and a limit mechanism installed on the lower die 2.
[0026] The bending assembly includes a stepper motor 3. A lead screw 4 is fixedly connected to the output end of the stepper motor 3. The lead screw 4 is rotatably connected to the inside of the base 1. A movable frame 5 is threadedly connected to the outside of the lead screw 4. A hydraulic cylinder 6 is fixedly connected to the top of the movable frame 5. A movable plate 7 is fixedly connected to the output end of the hydraulic cylinder 6. Two guide posts 8 are slidably connected inside the movable plate 7. A fixed plate 9 is fixedly connected to the bottom of the guide posts 8. The fixed plate 9 is fixedly connected to one side of the movable frame 5. A first lower pressure plate 10 is fixedly connected to the bottom of the movable plate 7. A second lower pressure plate 11 is provided on one side of the first lower pressure plate 10. A third lower pressure plate 12 is provided on one side of the second lower pressure plate 11. Both the second lower pressure plate 11 and the third lower pressure plate 12 are fixedly connected to the bottom of the movable plate 7. A connecting plate 13 is fixedly connected to one side of the movable frame 5. A first inclined plate 14 is fixedly connected to the top of the connecting plate 13. A second inclined plate 15 is provided on one side of the first inclined plate 14. The cross-section of the second inclined plate 15 is adapted to one side of the cross-section of the first lower pressure plate 10, and the cross-section of one side of the first inclined plate 14 is adapted to one side of the cross-section of the second lower pressure plate 11. By utilizing the adaptation of the cross-sections of the first lower pressure plate 10 and the second inclined plate 15, when the second inclined plate 15 moves to one side of the lower mold 2, the first lower pressure plate 10 and the second inclined plate 15 can perform an initial bend on the sheet metal part. By utilizing the adaptation of the cross-sections of the second lower pressure plate 11 and the first inclined plate 14, when the first inclined plate 14 moves to one side of the lower mold 2, the second lower pressure plate 11 and the first inclined plate 14 can perform a secondary bend on the sheet metal part. Then, the sheet metal part that has been bent twice can be bent again by the third lower pressure plate 12. The large-angle bend is decomposed into multiple small-angle bends, and multiple progressive bends are achieved on the sheet metal part, which effectively reduces the impact of springback on bending accuracy, thereby enhancing the forming ability of bending processing.
[0027] Reference Figure 6 As shown, the limiting mechanism includes a fixed frame 16, which is fixedly connected to the top of the lower mold 2. A cylinder 17 is installed at the top of the fixed frame 16, and a limiting plate 18 is fixedly connected to the output end of the cylinder 17. Multiple protective strips 19 are fixedly connected to the bottom end of the limiting plate 18. The cylinder 17 pushes the limiting plate 18 to move the multiple protective strips 19 downward, so that the limiting plate 18 can move the multiple protective strips 19 to limit the sheet metal part on the lower mold 2. This can limit the movement and deformation of the sheet metal part during the bending process, reduce the lateral sliding of the sheet metal part during the bending process, and make the bending force evenly applied to the sheet metal part, thereby ensuring the consistency of the bending angle.
[0028] Working principle of this utility model: This utility model is designed with a multi-step progressive bending die, the specific structure of which is shown in the attached instruction manual. Figure 1-6As shown, in this technical solution, through the cooperation between various structures, when it is necessary to bend the sheet metal parts of the industrial control computer box, the sheet metal parts are first placed on the lower mold 2, and the cylinder 17 is activated. The cylinder 17 pushes the limiting plate 18 down, so that the limiting plate 18 can drive multiple protective strips 19 to fit against the surface of the sheet metal parts, so that the limiting plate 18 can limit the sheet metal parts above the lower mold 2. Then, the stepper motor 3 drives the lead screw 4 to rotate, so that the lead screw 4 moves through the thread drive, so that the movable frame 5 can drive the second inclined plate 15 to fit against one side of the lower mold 2 through the connecting plate 13. Then, the hydraulic cylinder 6 is activated, so that the hydraulic cylinder 6 pushes the movable plate 7 down, so that the movable plate 7 can drive the first pressing plate 10 down. The second inclined plate 15 is adapted to the cross-section of the first lower pressure plate 10, allowing the first lower pressure plate 10 to perform an initial bend on the sheet metal part. Then, the stepper motor 3 is started again, so that the movable frame 5 can drive the first inclined plate 14 to move to one side of the lower mold 2 through the connecting plate 13. The hydraulic cylinder 6 is then started, and the second lower pressure plate 11 is adapted to the cross-section of the first inclined plate 14, so that the second lower pressure plate 11 can bend the sheet metal part that was initially bent again. Then, the stepper motor 3 is started again, so that the movable frame 5 can move the third lower pressure plate 12 to move above the lower mold 2. The hydraulic cylinder 6 is then started, so that the third lower pressure plate 12 presses down against the lower mold 2, allowing the sheet metal part that was bent a second time to bend again, thus completing the bending work of the sheet metal part.
[0029] In the accompanying drawings of the embodiments disclosed in this utility model, only the structures involved in the embodiments of this utility model are shown. Other structures can be referred to with ordinary design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0030] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are existing technologies and are therefore not shown in the figures and will not be described here.
[0031] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A multi-step progressive bending die, comprising a base (1), characterized in that: The base (1) is fixedly connected to the top of the lower mold (2), a bending component is installed on the base (1), and a limit mechanism is installed on the lower mold (2); The bending assembly includes a stepper motor (3), the output end of which is fixedly connected to a lead screw (4), the lead screw (4) is rotatably connected to the base (1), the outer side of the lead screw (4) is threadedly connected to a movable frame (5), the top of the movable frame (5) is fixedly connected to a hydraulic cylinder (6), and the output end of the hydraulic cylinder (6) is fixedly connected to a movable plate (7).
2. The multi-step progressive bending die according to claim 1, characterized in that: The movable plate (7) has two guide columns (8) that are slidably connected inside. The bottom end of the guide column (8) is fixedly connected to a fixing plate (9), and the fixing plate (9) is fixedly connected to one side of the movable frame (5).
3. The multi-step progressive bending die according to claim 1, characterized in that: The bottom end of the movable plate (7) is fixedly connected to a first pressure plate (10), a second pressure plate (11) is provided on one side of the first pressure plate (10), and a third pressure plate (12) is provided on one side of the second pressure plate (11). The second pressure plate (11) and the third pressure plate (12) are both fixedly connected to the bottom end of the movable plate (7).
4. The multi-step progressive bending die according to claim 1, characterized in that: A connecting plate (13) is fixedly connected to one side of the movable frame (5), and a first inclined plate (14) is fixedly connected to the top of the connecting plate (13). A second inclined plate (15) is provided on one side of the first inclined plate (14).
5. The multi-step progressive bending die according to claim 4, characterized in that: The cross-section of the second inclined plate (15) is adapted to the cross-section of one side of the first pressure plate (10), and the cross-section of one side of the first inclined plate (14) is adapted to the cross-section of one side of the second pressure plate (11).
6. The multi-step progressive bending die according to claim 1, characterized in that: The limiting mechanism includes a fixed frame (16), which is fixedly connected to the top of the lower mold (2), and a cylinder (17) is installed on the top of the fixed frame (16).
7. The multi-step progressive bending die according to claim 6, characterized in that: The output end of the cylinder (17) is fixedly connected to a limiting plate (18), and the bottom end of the limiting plate (18) is fixedly connected to multiple protective strips (19).