One-step negative angle forming die
Patent Information
- Application Number
- CN202522651470.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-15
AI Technical Summary
Traditional negative angle bending processes suffer from high manufacturing costs, require multiple sets of molds and equipment for mass production, and involve numerous production steps.
Design a one-step negative angle forming mold, which uses the cooperation of upper mold forming slider, insert knife, lower mold pressing float block and side push forming block to achieve one-time symmetrical bending forming of negative angles on both sides of the product, reducing subsequent shaping processes and mold equipment.
It achieves low-cost and fewer-process production of negative angle molding of products, meeting the high requirements of modern industrial production.
Smart Images
Figure CN224926879U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stamping die technology, and in particular to a one-step negative angle forming die. Background Technology
[0002] Stamping is a metal processing method that is based on the plastic deformation of metal. It uses dies and stamping equipment to apply pressure to sheet metal, causing the sheet metal to undergo plastic deformation or separation, thereby obtaining parts with certain shapes, sizes and properties.
[0003] like Figure 1 The high-strength steel plate product shown has irregular R-angles on both sides, which causes problems such as large springback and uncontrollable dimensions during forming. The traditional negative angle bending process is completed by four steps: composite material cutting, downward fan bending, upward U-shaped bending, and side shaping of the negative angle. This multi-step bending and shaping process has problems such as high manufacturing cost, multiple sets of mold equipment for mass production, and many production steps.
[0004] Therefore, existing technologies need to be improved and enhanced. Utility Model Content
[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a one-step negative angle forming mold that reduces the number of mold sets and production steps and reduces manufacturing costs.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A one-step negative angle forming mold includes an upper mold and a lower mold. The upper mold includes an upper mold base and an upper pad plate disposed below the upper mold base. Two upper mold forming sliders are arranged side by side below the upper pad plate. A cutter fixed to the upper mold base is disposed on each side of the upper pad plate. The lower mold includes a lower mold base and a lower template disposed above the lower mold base. The lower template is provided with a lower mold pressing float that cooperates with the two upper mold forming sliders. On each side of the lower mold pressing float, there is a side pushing forming block that cooperates with the insert and the upper mold forming slider disposed on the same side.
[0007] As a further embodiment of this utility model, a slider ejector pin is provided between the upper mold forming slider and the upper return spring, the upper return spring is provided in the movable groove of the upper mold base, and the slider ejector pin is movably inserted into the upper pad.
[0008] As a further embodiment of this utility model, the upper reset spring is fixed to the top wall of the movable groove by a nut screw.
[0009] As a further embodiment of this utility model, a fixing block is fixed below the center of the upper pad, and the two upper mold forming sliders are slidably installed on both sides of the fixing block.
[0010] As a further embodiment of this utility model, the upper mold forming slider is inclined to one side of the fixed block, and the fixed block is provided with a groove that matches the slider.
[0011] As a further embodiment of this invention, the cross-section of the slider is trapezoidal.
[0012] As a further embodiment of this utility model, a bolt is connected to the side of the side-push forming block away from the lower die pressing float. The bolt passes through a support block and is connected to the side-push forming block. A return spring is sleeved on the smooth rod between the bolt nut and the support block. The support block is fixed to the lower template.
[0013] As a further embodiment of this utility model, a floating pin is provided between the lower die pressing float and the reset nitrogen spring. The reset nitrogen spring is installed on the lower die base, and the floating pin is movably inserted into the lower die base and the lower die plate.
[0014] As a further embodiment of this utility model, the upper mold base is provided with a plurality of guide posts, and the lower mold base is provided with guide sleeves that correspond one-to-one with the plurality of guide posts.
[0015] Compared with the prior art, the beneficial effects of this utility model are: Due to the above structural design, namely, the upper mold is equipped with two upper mold forming sliders and two inserts; the lower mold is equipped with a lower mold pressing float and two side push forming blocks, the upper mold forming sliders, inserts, lower mold pressing floats and side push forming blocks cooperate to achieve one-time symmetrical bending forming of the negative angles on both sides of the product. No subsequent shaping process is required, nor are multiple sets of mold equipment. This not only reduces manufacturing costs but also reduces production steps, which can meet the increasingly high requirements of modern industrial production for negative angle forming molds. Attached Figure Description
[0016] Appendix Figure 1 This is a schematic diagram of a high-strength product; Appendix Figure 2 This is a schematic diagram of the mold opening state in an embodiment of the present invention; Appendix Figure 3 This is a schematic diagram of the mold-closed state in an embodiment of the present invention.
[0017] The labels in the diagram are as follows: 10 - Upper mold, 20 - Lower mold; 11-Upper mold base, 12-Upper backing plate, 13-Upper mold forming slider, 14-Insertion tool, 15-Fixing block; 21-Lower mold base, 22-Lower template, 23-Lower mold pressing float, 24-Side push forming block; 131 - Upper return spring, 132 - Slider pin, 133 - Measuring screw; 241- Bolt, 242- Alternating block, 243- Lower return spring; 231-Float pin, 232-Reset nitrogen spring; 111-Guide post; 211-Guide sleeve. Detailed Implementation
[0018] The present invention will now be described in further detail with reference to the accompanying drawings: The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.
[0019] In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0020] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example
[0021] like Figure 2 and Figure 3 As shown, this application discloses a one-step negative angle forming mold, comprising an upper mold 10 and a lower mold 20. The upper mold 10 includes an upper mold base 11 and an upper pad 12 disposed below the upper mold base 11. Two upper mold forming sliders 13 are arranged side by side below the upper pad 12. A cutter 14 fixed to the upper mold base 11 is disposed on each side of the upper pad 12. The lower mold 20 includes a lower mold base 21 and a lower template 22 disposed above the lower mold base 21. The lower template 22 is provided with a lower mold pressing float 23 that cooperates with the two upper mold forming sliders 13. On each side of the lower mold pressing float 23, there is a side-push forming block 24 that cooperates with the insert 14 and the upper mold forming slider 13 disposed on the same side. The upper mold forming slider has an R-shaped notch at the corner facing the side-push forming block disposed on the same side. The side-push forming block has an R-shaped corner that cooperates with the R-shaped notch. The side-push forming block has a driven inclined surface on the other side opposite to the R-shaped corner. The insert has a driving inclined surface that cooperates with the driven inclined surface. Through the above structural design, the upper mold forming slider and insert, together with the lower mold pressing float and side-push forming block, realize the one-time symmetrical bending forming of the negative angles on both sides of the product. No subsequent shaping process is required, nor are multiple sets of mold equipment required. This not only reduces manufacturing costs but also reduces production steps, which can meet the increasingly high requirements of modern industrial production for negative angle forming molds.
[0022] During operation, the upper mold moves downwards, and the upper mold forming slider contacts the product to form a pressure against the lower mold pressing float. The upper mold continues to move downwards, and the product is initially formed under the action of the upper mold forming slider and the two side pushing forming blocks. The upper mold continues to move downwards, and the two side pushing forming blocks are laterally pushed and shaped under the action of the corresponding inserts. The upper mold moves upwards, the upper and lower molds separate, and the product is ejected from the mold surface under the action of the lower mold pressing float. The side pushing forming blocks are reset. In this one stroke, the negative angle forming of the product is completed.
[0023] Specifically, a slider ejector pin 132 is provided between the upper mold forming slider 13 and the upper return spring 131. The upper return spring 131 is located in the movable groove of the upper mold base 11 and is fixed to the top wall of the movable groove by a nut screw 133. The slider ejector pin 132 is movably inserted into the upper pad plate 12. Before mold closing, the upper mold forming slider extends out of the upper pad plate under the action of the upper return spring. When the upper mold forming slider contacts the product, it continues to cooperate with the lower mold pressure block floating material under the action of the upper return spring to hold the product. Under the continuous action of the upper return spring, the upper mold forming will not rigidly impact the product due to excessive mold closing force, but will maintain flexible pressing, thereby achieving stable holding of the product during the forming process and preventing displacement.
[0024] Specifically, a fixing block 15 is fixed below the middle of the upper pad 12, and two upper mold forming sliders 13 are slidably installed on both sides of the fixing block 15. Each upper mold forming slider 13 is inclined to one side of the fixing block 15, and the fixing block 15 is provided with a sliding groove that matches the slider. The cross-section of the slider is trapezoidal. When the upper mold moves downward, the upper mold forming slider moves upward along the fixing block through the cooperation of the slider and the sliding groove. When the upper mold moves downward, the upper mold forming slider moves downward along the fixing block under the action of the upper return spring.
[0025] Specifically, a bolt 241 is connected to the side of the side-push forming block 24 away from the lower die pressing float 23. The bolt 241 passes through a support block 242 and is connected to the side-push forming block 24. A lower return spring 243 is sleeved on the smooth rod between the nut of the bolt 241 and the support block 242. The support block 242 is fixed to the lower template 22. When the inserter does not drive the side-push forming block to move towards the lower die pressing float, the side-push forming block cooperates with the upper die forming slider to achieve preliminary shaping of the product. When the inserter drives the side-push forming block to move towards the lower die pressing float, the side-push forming block cooperates with the upper die forming block to achieve negative angle shaping of the product. At this time, the lower return spring is compressed. When the inserter moves upward, the side-push forming block is reset under the action of the lower return spring.
[0026] Specifically, a float pin 231 is provided between the lower mold pressing float 23 and the reset nitrogen spring 232. The reset nitrogen spring 232 is installed on the lower mold base 21. The float pin 231 is movably inserted into the lower mold base 21 and the lower mold plate 22. Through the above structural design, when the upper and lower molds are separated, the product is ejected from the mold surface under the action of the lower mold pressing float 23.
[0027] Specifically, the upper mold base 11 is provided with four guide pillars 111, which are distributed at the four corners of the upper mold base. The lower mold base 21 is provided with guide sleeves 211 that correspond to the four guide pillars one by one. Through the cooperation of the guide pillars and guide sleeves, the upper and lower molds are ensured to be accurately aligned and move smoothly during the stamping process, thereby ensuring the dimensional accuracy of the product, the mold life and the safety of operation.
[0028] In summary, this utility model, through the above-described structural design, overcomes the shortcomings of the prior art and features a reasonable structure, fewer processes, and low cost.
[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.
Claims
1. A one-step negative angle forming mold, comprising an upper mold (10) and a lower mold (20), characterized in that: The upper mold (10) includes an upper mold base (11) and an upper pad (12) disposed below the upper mold base (11). Two upper mold forming sliders (13) are arranged side by side below the upper pad (12). A cutter (14) fixed on the upper mold base (11) is provided on each side of the upper pad (12). The lower mold (20) includes a lower mold base (21) and a lower template (22) disposed above the lower mold base (21). The lower template (22) is provided with a lower mold pressing float (23) that cooperates with the two upper mold forming sliders (13). On each side of the lower mold pressing float (23) is a side push forming block (24) that cooperates with the insert (14) and the upper mold forming slider (13) disposed on the same side.
2. The one-step negative angle forming mold according to claim 1, characterized in that: A slider ejector pin (132) is provided between the upper mold forming slider (13) and the upper return spring (131). The upper return spring (131) is located in the movable groove of the upper mold base (11), and the slider ejector pin (132) is movably inserted into the upper pad (12).
3. The one-step negative angle forming mold according to claim 2, characterized in that: The upper return spring (131) is fixed to the top wall of the movable groove by a nut screw (133).
4. The one-step negative angle forming mold according to claim 3, characterized in that: A fixing block (15) is fixed below the middle part of the upper pad (12), and the two upper mold forming sliders (13) are slidably installed on both sides of the fixing block (15).
5. The one-step negative angle forming mold according to claim 4, characterized in that: The upper mold forming slider (13) is inclined to one side of the fixed block (15) and a slider is provided on the fixed block, and a groove adapted to the slider is provided on the fixed block.
6. The one-step negative angle forming mold according to claim 5, characterized in that: The cross-section of the slider is trapezoidal.
7. The one-step negative angle forming mold according to claim 6, characterized in that: A bolt (241) is connected to the side of the side-push forming block (24) away from the lower die pressing float (23). The bolt (241) passes through a support block (242) and is connected to the side-push forming block (24). A return spring (243) is sleeved on the smooth rod between the nut of the bolt (241) and the support block (242). The support block (242) is fixed on the lower template (22).
8. The one-step negative angle forming mold according to claim 7, characterized in that: A float pin (231) is provided between the lower die pressing float (23) and the reset nitrogen spring (232). The reset nitrogen spring (232) is installed on the lower die base (21). The float pin (231) is movably inserted into the lower die base (21) and the lower die plate (22).
9. The one-step negative angle forming mold according to claim 8, characterized in that: The upper mold base (11) is provided with a plurality of guide posts (111), and the lower mold base (21) is provided with guide sleeves (211) that correspond one-to-one with the plurality of guide posts (111).