Closed bending forming device
By setting clearance groove one and clearance groove two in the closed bending forming device, the problems of low bending accuracy and efficiency of closed parts are solved, and efficient and low-cost forming of closed parts is achieved.
Patent Information
- Application Number
- CN202520356964.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-03
AI Technical Summary
Existing closed-part bending technology suffers from problems such as large precision errors, low efficiency, high cost, and complex operation.
Design a closed bending forming device, which adopts an upper bending die and a lower bending die, and sets up a first avoidance groove and a second avoidance groove to avoid interference between the bent part and the upper die, ensuring forming accuracy and efficiency, and is suitable for sheet metal of different thicknesses.
It achieves high-precision closed molding of parts, improves efficiency, reduces processing costs, expands the scope of application, and simplifies the operation process.
Smart Images
Figure CN223789384U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of closed bending technology, and specifically to a closed bending forming device. Background Technology
[0002] Currently, bending of closed parts commonly employs manual straightening or die forming. Manual straightening involves first bending the workpiece with a bending tool. However, during the final closing bend, interference between the upper die and the workpiece forces an open bend, followed by manual straightening to form the closed part. The disadvantages of this method include significant errors in the part's surface accuracy, low efficiency, and difficulty in controlling surface springback, affecting the final forming effect. Die forming, similar to molding, is an improved pressing method. After multiple bending steps, the final closing process uses die forming. This method suffers from high cost, complex operation, and low efficiency. Utility Model Content
[0003] This utility model addresses the existing technical problems by providing a closed bending and forming device.
[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A closed bending forming device includes an upper bending die and a lower bending die. The upper end of the upper bending die is provided with a die handle. The upper bending die is connected to a bending machine through the die handle. The lower end of the upper bending die is provided with an upper punch. One side of the upper bending die is provided with a relief groove one, and the other side is provided with a relief groove two. The relief groove one is used to match the folded edge b of the bent part, and the relief groove two is used to match the folded edge g of the bent part. The lower bending die is provided with a lower concave die, and the lower concave die is matched with the upper punch.
[0005] Based on the above technical solution, the present invention can be further improved as follows:
[0006] Preferably, the included angle α of the first clearance groove is greater than or equal to the included angle δ of the second clearance groove.
[0007] Preferably, the included angle α of the avoidance groove is a right angle or an obtuse angle.
[0008] Preferably, the included angle δ of the second clearance groove is a right angle.
[0009] Preferably, the lower sidewall of the second clearance groove is inclined inward from bottom to top to form a clearance slope.
[0010] Preferably, the upper punch is a V-shaped punch and the lower die is a V-shaped groove.
[0011] The beneficial effects of this utility model are as follows: By providing clearance groove 1 and clearance groove 2 on both sides of the bending upper die, clearance space is formed for the forming part of the bent part, avoiding interference between the forming part and the bending upper die, which would cause deformation of the bent part. The clearance grooves ensure that the bent part can spring back to a closed state after all bending is completed, realizing that all bending requirements of the bent part can be met with one set of bending dies. This ensures the stability of the formed part and improves its forming accuracy and efficiency. It also ensures the structural strength of the bending upper die, is suitable for bending sheets of various thicknesses, expands the application range, reduces processing costs, and allows clearance groove 1 and clearance groove 2 to be machined at corresponding positions according to the size of the bent part, further improving the convenience of use. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the bending upper die of this utility model;
[0013] Figure 2 This is a schematic diagram of the bending lower die of this utility model;
[0014] Figure 3 This is a schematic diagram illustrating the use of this utility model;
[0015] Figure 4 A schematic diagram of the bent part after bending;
[0016] Figure 5 A three-dimensional schematic diagram of the bent part after bending.
[0017] The attached diagram is labeled as follows: 100, upper bending die; 101, die holder; 102, clearance groove one; 103, clearance groove two; 104, upper punch; 105, clearance slope; 200, lower bending die; 201, lower concave die. Detailed Implementation
[0018] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0019] like Figures 1 to 5As shown, this utility model discloses a closed bending forming device, including an upper bending die 100 and a lower bending die 200. The upper end of the upper bending die 100 is provided with a die handle 101, and the upper bending die 100 is connected to a bending machine through the die handle 101. The lower end of the upper bending die 100 is provided with an upper punch 104. One side of the upper bending die 100 is provided with a first clearance groove 102, and the other side of the upper bending die 100 is provided with a second clearance groove 103. The first clearance groove 102 is used to interact with the bending machine. The bent edge b is adapted to the bending part, and the relief groove 103 is adapted to the bent edge g of the bending part. The bent edge b and the bent edge g are located at both ends of the bending part. The lower bending die 200 is provided with a lower concave die 201, which is adapted to the upper punch 104. Specifically, the upper punch 104 is a V-shaped punch, and the lower concave die 201 is a V-shaped groove. The size and shape of the upper punch 104 and the lower concave die 201 correspond to the bending part to meet the bending requirements of bending parts of different shapes. The bending machine drives the upper bending die 100 downwards. The upper punch 104 cooperates with the lower die 201 to bend the workpiece. Clearance grooves 102 and 103 are used to avoid the previously formed folded edges b and g. Furthermore, the upper wall of clearance groove 102 fits against the previously formed folded edge b, and the upper wall of clearance groove 103 fits against the previously formed folded edge g, ensuring that folded edges b and g maintain their formed shape and angle, thus guaranteeing that the final formed shape of the bent workpiece meets the design requirements. Based on the shape and size of the bent workpiece, corresponding clearance grooves 102 and 103 are machined on the upper bending die 100 to ensure that the bent workpiece can accurately achieve a closed state after bending and springback. By forming relief groove 102 and relief groove 103 through partial openings on the upper bending die 100, the structural strength of the upper bending die 100 is ensured, thereby enabling the bending forming device to meet the bending requirements of thicker plates and longer plates, improving the applicability of the bending forming device and reducing processing costs.
[0020] Wherein, the included angle α of the first relief groove 102 is greater than or equal to the included angle δ of the second relief groove 103. Since the folded edge b and the folded edge c are located on the same side of the bending upper die 100, setting a larger included angle α can avoid the side wall of the first relief groove 102 from interfering with the folded edge c, ensuring the forming angle between the folded edge b and the folded edge c, thereby ensuring the forming effect of the bent part.
[0021] In this embodiment, the included angle α of the first clearance groove 102 is a right angle or an obtuse angle, and further, the included angle δ of the second clearance groove 103 is a right angle. The included angles α and δ are set according to the shape of the workpiece to be bent, so that the already bent edge of the workpiece can fit against the sidewalls of the first clearance groove 102 and the second clearance groove 103. This solves the problem of interference between the upper bending die 100 and the bent edge, and also positions the already formed edge of the bent workpiece, ensuring that the bent workpiece can spring back to the closed state normally after being fully bent, thus meeting the design requirements.
[0022] Furthermore, the lower sidewall of the second clearance groove 103 is inclined inward from bottom to top to form a clearance slope 105. This causes the end of the folded edge g of the bent part to move upward along the clearance slope 105 until the folded edge g is in contact with the upper sidewall of the second clearance groove 103, further reducing the deformation of the folded edge g and ensuring the bending accuracy of the bent part.
[0023] The usage process of this utility model is as follows:
[0024] According to the dimensions required in the drawing, with the cooperation of the upper punch 104 and the lower die 201, the bent parts are formed sequentially by bending from edge a to edge c, edge f and edge g.
[0025] Then, the bending process forms folded edges d and e, wherein folded edge b is fitted with the upper side wall of the first relief groove 102, and folded edge g is fitted with the upper side wall of the second relief groove 103, ensuring the final forming accuracy and forming effect of the bent part.
[0026] Compared to sequential bending, which results in all the formed folded edges being located on one side of the bending upper die 100, causing interference between the formed folded edges and the bending upper die 100, this utility model first bends to form the folded edges at both ends, and then bends the middle part, reducing the length of the bent part on one side. Furthermore, the folded edges formed by bending at both ends are avoided by the avoidance groove 102 and the avoidance groove 2 103, preventing interference between the folded edges and the bending upper die 100 and the bent part. It can also position the folded edges to ensure the final bending accuracy and forming effect of the bent part.
[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A closed bending forming device, characterized in that, The application relates to a bending die, which comprises a bending upper die (100) and a bending lower die (200), the upper end of the bending upper die (100) is provided with a die handle (101), the bending upper die (100) is connected with a bending machine through the die handle (101), the lower end of the bending upper die (100) is provided with an upper convex die (104), one side of the bending upper die (100) is provided with an avoiding groove I (102), and the other side is provided with an avoiding groove II (103), the avoiding groove I (102) is used for adapting to a folded edge b of a bending piece, the avoiding groove II (103) is used for adapting to a folded edge g of the bending piece, and the bending lower die (200) is provided with a lower concave die (201), which is adapted to the upper convex die (104).
2. The closed draw bending device of claim 1, wherein, The included angle alpha of the avoiding groove I (102) is greater than or equal to the included angle delta of the avoiding groove II (103).
3. The closed draw forming device of claim 2, wherein, The included angle alpha of the avoiding groove I (102) is a right angle or an obtuse angle.
4. The closed draw forming device of claim 2 or 3, wherein The included angle delta of the avoiding groove II (103) is a right angle.
5. The closed-die forming apparatus of claim 1, wherein The lower side wall of the avoiding groove II (103) is inwardly inclined from bottom to top to form an avoiding inclined surface (105).
6. The closed-die forming apparatus of claim 1, wherein The upper convex die (104) is a V-shaped punch, and the lower concave die (201) is a V-shaped groove.