One-step forming negative angle bending device
By designing a one-step negative angle bending device, the device utilizes the cooperation of a punch and die to rotate the bending block, achieving efficient and precise bending of negative angles in sheet metal. This solves the problems of low efficiency and insufficient precision in existing technologies and simplifies the processing flow.
Patent Information
- Application Number
- CN202520611902.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-02
AI Technical Summary
Existing technologies are inefficient and cannot guarantee the accuracy of bending angles when processing Z-shaped plates with negative angles, requiring multiple bending operations and resulting in a decline in forming quality.
Design a one-step negative angle bending device that uses a punch and a die in combination with a rotating folding block to achieve negative angle bending of the sheet metal through the extrusion of the negative angle convex and concave parts, simplifying it to one-step forming.
It achieves efficient and precise bending of negative angles in sheet metal, reduces processing steps, and improves forming rate and ease of operation.
Smart Images
Figure CN223946531U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to plate processing equipment technical field especially relates to a one-step forming negative angle bending device. BACKGROUND
[0002] When the plate is bent, the bending angle is various with the design form of the plate. For the bending of the several-shaped plate with negative angle (the bending angle is less than 90 DEG), the bending die of the bending equipment of the prior art is a right angle structure, the plate is first bent by 90 DEG through the right angle die, and then the plate is bent twice through the bending equipment, forming the negative angle several-shaped structure of the specified angle.
[0003] The processing mode of the prior art is not only low in efficiency, but also cannot guarantee the bending angle accuracy of the negative angle, needs secondary bending or even multiple rework bending, and the operation is very inconvenient, and the forming quality of the plate is reduced. Therefore, a one-step forming negative angle bending device needs to be provided to solve the problems of multiple negative angle bending processing procedures and inconvenient operation in the prior art. SUMMARY
[0004] The utility model discloses a one-step forming negative angle bending device can solve the problems of multiple negative angle bending processing procedures and inconvenient operation in the prior art.
[0005] The utility model is realized in this way:
[0006] A one-step forming negative angle bending device, comprising a punch, an upper die plate, a die, a lower die plate and a rotating flange block, the top of the punch is installed on the upper die plate, the bottom of the punch is formed with a negative angle convex part, the bottom of the die is installed on the lower die plate, the top of the die is formed with a flange groove, the plate is placed on the flange groove of the die, so that the bottom of the punch can be inserted into the flange groove and the plate is pressed into the flange groove, the bottom of the flange groove is rotatably embedded with a rotating flange block, a negative angle concave part is formed on the rotating flange block, the angle of the negative angle concave part is less than 90 DEG, the negative angle convex part can be matched and embedded into the negative angle concave part, and the bending part of the plate is extruded to form a negative angle between the negative angle concave part and the negative angle convex part.
[0007] The bottom angle of the flange groove is 90 DEG, a circular groove with a notch in the radial section is formed in the bottom angle of the flange groove, the notch is communicated with the flange groove, the inner diameter of the circular groove is matched with the outer diameter of the rotating flange block, so that the rotating flange block can be rotatably embedded in the circular groove, and the negative angle concave part is arranged to face the notch and the flange groove.
[0008] The negative angle concave part comprises a first edge capable of being attached to the bottom surface of the negative angle convex part and a second edge capable of being attached to the side surface of the negative angle convex part; when the bottom surface of the convex die is attached to the bottom surface of the flanging groove, the first edge, the bottom surface of the negative angle convex part, the bottom surface of the convex die and the bottom surface of the flanging groove are located in the same horizontal plane, and the second edge is located in the flanging groove; when the convex die is removed from the flanging groove, the second edge is located in the circular groove.
[0009] The rotating flanging block spring fixing pin is arranged on the rotating flanging block, the concave die spring fixing pin is arranged on the concave die, the rotating flanging block spring fixing pin and the concave die spring fixing pin are connected through a spring, and the rotating flanging block can rotate in the circular groove through the spring.
[0010] The concave die is provided with a rotating flanging block stopper which presses the end of the rotating flanging block.
[0011] The top of the concave die is provided with a guide column, and the upper die plate is embedded with a guide sleeve, and the upper part of the guide column is movably penetrated through the guide sleeve.
[0012] The top of the concave die is provided with a positioning block.
[0013] The top of the convex die is respectively installed on the upper die plate through the convex die stopper on both sides.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1、 the utility model discloses a convex die and a concave die, the negative angle convex part formed in the bottom of the convex die cooperates with the negative angle concave part formed in the bottom of the flanging groove of the concave die, and the plate is extruded to form a negative angle character-shaped structure meeting the bending angle requirement in one step, so that the negative angle bending precision of the plate is guaranteed.
[0016] 2、 the utility model discloses a first rotating flanging block and a second rotating flanging block, and the first rotating flanging block and the second rotating flanging block are rotated in the circular groove in the process that the convex die is pressed down, so that the plate is extruded in the negative angle convex part and the negative angle concave part, the negative angle bending of the plate is formed in one step, and the plate does not need to be bent twice or even multiple times, the processing procedure is reduced, the negative angle bending efficiency and the forming rate of the plate are improved, and the operation is convenient and simple. DRAWINGS
[0017] Figure 1 It is the front view of the one-step forming negative angle bending device of the utility model.
[0018] Figure 2 It is the perspective view of the one-step forming negative angle bending device of the utility model.
[0019] In the figure, 1 punch, 2 punch stopper, 3 upper die plate, 4 guide sleeve, 5 guide column, 6 positioning block, 7 die, 701 flanging groove, 702 circular groove, 8 lower die plate, 9 die spring fixing pin, 10 first rotating flanging block, 11 rotating flanging block stopper, 12 plate, 13 second rotating flanging block, 14 spring, 15 flanging block spring fixing pin, 16 negative angle convex part, 17 negative angle concave part, 171 first side, 172 second side. DETAILED DESCRIPTION
[0020] The utility model will be further described below in combination with the drawings and specific embodiments.
[0021] Please refer to the accompanying Figure 1 and the accompanying Figure 2 A one-step forming negative angle bending device, comprising a punch 1, an upper die plate 3, a die 7, a lower die plate 8 and a rotating flanging block; the upper die plate 3 is installed on the upper slide block of a punch press, the top of the punch 1 is installed on the upper die plate 3, and the bottom of the punch 1 is formed with a negative angle convex part 16; the bottom of the die 7 is installed on the lower die plate 8, the top of the die 7 is formed with a flanging groove 701, the plate 12 is placed on the flanging groove 701 of the die 7, so that the bottom of the punch 1 can be inserted into the flanging groove 701 and press the plate 12 into the flanging groove 701; the rotating flanging block is rotatably embedded at the bottom of the flanging groove 701, the rotating flanging block is formed with a negative angle concave part 17, the angle of the negative angle concave part 17 is less than 90°, and the negative angle convex part 16 can be matched and embedded into the negative angle concave part 17 and extrude the bending part of the plate 12 between the negative angle concave part 17 and the negative angle convex part 16 to form a negative angle.
[0022] The width of the flanging groove 701 is slightly larger than the width of the bottom of the punch 1, so that the plate 12 is pressed into the flanging groove 701 by the bottom of the punch 1 during the downward movement of the punch 1, and a U-shaped bending of 90° is preliminarily formed. With the continuous downward movement of the punch 1, the negative angle convex part 16 at the bottom of the punch 1 is pressed into the negative angle concave part 17 of the rotating flanging block, and through the further extrusion of the negative angle convex part 16 and the negative angle concave part 17 matched in shape to the plate 12, a U-shaped bending of a negative angle is formed.
[0023] The negative angle of the negative angle convex part 16 and the negative angle concave part 17 can be adaptively adjusted according to the bending angle of the plate 12, one-step bending forming can be realized, secondary bending or even multiple bending is not needed, the negative angle bending efficiency of the plate 12 can be improved while the negative angle bending precision is ensured, and the processing procedure is reduced.
[0024] The punch 1 and the upper die plate 3 are driven synchronously upward and downward by the upper slide block of the punch press, or the upper die plate 3 can be installed on other driving devices according to actual use requirements to control the stroke of the punch 1, so that the operation is convenient, simple and easy to automatically control.
[0025] Preferably, the bottom of the punch 1 is formed with negative angle protrusions 16 on both sides, and the bottom of the folding groove 701 is rotatably embedded with first and second rotating folding blocks 10 and 13 with negative angle recesses 17 on both sides, so that the negative angle protrusions 16 on both sides of the punch 1 are embedded into the negative angle recesses 17 of the first and second rotating folding blocks 10 and 13, and the plate 12 is formed with a negative angle hairpin structure.
[0026] Generally, the bending of the plate 12 is a hairpin structure with negative angles on both sides, and negative angle protrusions 16 can be provided on both sides of the bottom of the punch 1, and negative angle recesses 17 can be provided on both sides of the bottom of the folding groove 701 to meet the bending requirements. The negative angle protrusions 16 and the negative angle recesses 17 on each side are matched, and the negative angles of the negative angle protrusions 16 and the negative angle recesses 17 on both sides can be the same or different, which can adapt to different processing requirements and has good adaptability and versatility.
[0027] The bottom angle of the folding groove 701 is 90°, and a circular groove 702 with a notch in the radial section is formed at the bottom angle of the folding groove 701, and the notch communicates with the folding groove 701. The inner diameter of the circular groove 702 matches the outer diameter of the rotating folding block, so that the rotating folding block can be rotatably embedded in the circular groove 702. The negative angle recess 17 is arranged facing the notch and the folding groove 701.
[0028] Preferably, the notch angle of the circular groove 702 is 90°, which can effectively wrap the rotating folding block, so that the rotating folding block can rotate in the circular groove 702 without falling out. The length of the circular groove 702, the length of the rotating folding block and the length of the punch 1 are consistent and not less than the length of the plate 12, so as to ensure that the rotating folding block cooperates with the punch 1 to effectively bend the negative angle of the bending part of the plate 12.
[0029] The circular groove 702 and the circular side surface structure of the negative angle recess 17 guide the movement of the rotating folding block, ensuring that the rotating folding block rotates around the central axis in the circular groove 702.
[0030] The negative angle recess 17 includes a first edge 171 that can be attached to the bottom surface of the negative angle protrusion 16 and a second edge 172 that can be attached to the side surface of the negative angle protrusion 16. When the bottom surface of the punch 1 is attached to the bottom surface of the folding groove 701, the first edge 171, the bottom surface of the negative angle protrusion 16, the bottom surface of the punch 1 and the bottom surface of the folding groove 701 are located in the same horizontal plane, and the second edge 172 is located in the folding groove 701. When the punch 1 is removed from the folding groove 701, the second edge 172 is located in the circular groove 702.
[0031] In the initial state, the second edge 172 is located in the circular groove 702, and the interference of the punch 1 downward movement can be avoided. When the punch 1 moves downward to the negative angle recess 17 and contacts the first edge 171, the first edge 171 can be pressed to make the rotating flanging block rotate in the circular groove 702 until the bottom surface of the punch 1 matches the bottom surface of the flanging groove 701.
[0032] At this time, the first edge 171, the bottom surface of the negative angle convex part 16, the bottom surface of the punch 1 and the bottom surface of the flanging groove 701 are located in the same horizontal plane, the second edge 172 matches the side surface of the negative angle convex part 16, and the first edge 171 matches the bottom surface of the negative angle convex part 16. The bending part of the plate 12 is bent into a negative angle in one step, and the negative angle is accurate under the extrusion of the negative angle convex part 16 and the negative angle recess 17.
[0033] The rotating flanging block (including the first rotating flanging block 10 and the second rotating flanging block 13) is provided with a flanging block spring fixing pin 15, the concave die 7 is provided with a concave die spring fixing pin 9, and the flanging block spring fixing pin 15 and the concave die spring fixing pin 9 are connected through the spring 14, so that the rotating flanging block can rotate in the circular groove 702 through the spring 14.
[0034] Preferably, the concave die spring fixing pin 9 is located outside the flanging block spring fixing pin 15, and in the initial state, that is, when the second edge 172 is located in the circular groove 702, the spring 14 is in the natural length. During the pressing process of the concave die 1, the spring 14 is gradually stretched and stored with power along with the rotation of the rotating flanging block, so that the spring 14 can be used to make the rotating flanging block reverse rotation and reset after the bending action is completed.
[0035] The concave die 7 is provided with a rotating flanging block stopper 11, and the rotating flanging block stopper 11 presses the end of the rotating flanging block (including the first rotating flanging block 10 and the second rotating flanging block 13).
[0036] Preferably, the rotating flanging block stopper 11 can be arranged on the concave die 7 at both ends of the rotating flanging block, which can play the role of axial limiting for the rotating flanging block, and prevent the rotating flanging block from being taken out of the circular groove 702 along the axial direction.
[0037] The top of the concave die 7 is provided with a guide column 5, and the upper die plate 3 is embedded with a guide sleeve 4, and the upper part of the guide column 5 is movably penetrated through the guide sleeve 4.
[0038] Through the arrangement of the guide column 5 and the guide sleeve 4, the stability and linearity of the upward and downward movement of the upper die plate 3 can be improved, so as to ensure the stable and controllable stroke of the punch 1, and further improve the bending precision. Preferably, the guide column 5 and the guide sleeve 4 can be arranged symmetrically on both sides of the punch 1.
[0039] The top of the female die 7 is provided with a positioning block 6, which can be contacted by the upper die plate 3 when the upper die plate 3 goes down, so as to control the maximum downward stroke of the upper die plate 3.
[0040] Preferably, the positioning block 6 can be provided with four blocks, which are symmetrically located at the top of the four corners of the female die 7. The height of the positioning block 6 can be determined according to the maximum downward stroke of the upper die plate 3, so as to avoid excessive extrusion and bending of the plate 12.
[0041] The top of the male die 1 is installed on the upper die plate 3 through male die blocks 2 on both sides of the top of the male die 1.
[0042] Preferably, the male die blocks 2 can be provided at the top of the four corners of the male die 1, so as to ensure the firmness and stability of the installation of the male die 1 on the upper die plate 3, avoid the inclination or deviation of the male die 1 during the pressing process, and further ensure the bending accuracy.
[0043] Please refer to the accompanying drawings Figure 1 and the accompanying drawings Figure 2 , the working process and working principle of the utility model are as follows:
[0044] The upper die plate 3 is installed on the upper slide block of the punch, and when the upper slide block of the punch goes down or goes up, the upper die plate 3 and the male die 1 can be driven to go down or go up synchronously. The plate 12 is placed on the female die 7, and the bending part of the plate 12 is located above the folding groove 701.
[0045] During the downward process of the male die 1, the bottom of the male die 1 first contacts the plate 12, and the plate 12 is pressed into the folding groove 701 of the female die 7, so as to preliminarily form a 90° Z-shaped bending. With the continuous downward process of the male die 1, the negative-angle convex part 16 on both sides of the bottom of the male die 1 is pressed into the negative-angle concave part 17 of the first rotating folding block 10 and the second rotating folding block 13.
[0046] During the downward process of the male die 1, the first edge 171 of the negative-angle concave part 17 is pressed by the protruding negative-angle convex part 16, so as to drive the first rotating folding block 10 and the second rotating folding block 13 to rotate in the circular groove 702. At this time, the spring 14 is stretched to store energy, until the bottom surface of the male die 1 is matched with the bottom surface of the folding groove 701, the second edge 172 of the negative-angle concave part 17 is rotated from the circular groove 702 to the folding groove 171, and the plate 12 is matched and extruded by the bottom surface of the negative-angle convex part 16 and the first edge 171 of the negative-angle concave part 17 and the side surface of the negative-angle convex part 16 and the second edge 172 of the negative-angle concave part 17, so as to form a negative angle, thereby completing the negative-angle bending action of the plate 12 in one step.
[0047] After the negative angle bending is completed, the upper slide of the punch drives the upper die plate 3 and the male die 1 to move upward, so that the bottom of the male die 1 is out of the flange groove 701, and the negative angle convex part 16 is out of the negative angle concave part 17. In this process, the elastic force of the spring 14 makes the first rotating flange block 10 and the second rotating flange block 13 reverse rotate and reset in the circular groove 702, so that the second edge 172 of the negative angle concave part 17 rotates into the circular groove 702, facilitating the next negative angle bending action.
[0048] The above are only preferred embodiments of the present application, and are not used to limit the protection scope of the present application, thus, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A one-step forming negative angle bend apparatus, characterized by: The punch (1), the upper die plate (3), the concave die (7), the lower die plate (8) and the rotating flanging block are included; the top of the punch (1) is installed on the upper die plate (3), and the bottom of the punch (1) is formed with a negative angle convex part (16); The bottom of the concave die (7) is installed on the lower die plate (8), the top of the concave die (7) is formed with a flanging groove (701), the plate member (12) is placed on the flanging groove (701) of the concave die (7), so that the bottom of the punch (1) can be inserted into the flanging groove (701) and the plate member (12) is pressed into the flanging groove (701); the bottom of the flanging groove (701) is rotatably embedded with the rotating flanging block, the rotating flanging block is formed with a negative angle concave part (17), the angle of the negative angle concave part (17) is less than 90°, the negative angle convex part (16) can be matched and embedded into the negative angle concave part (17), and the bending part of the plate member (12) is extruded to form a negative angle between the negative angle concave part (17) and the negative angle convex part (16).
2. The one-step negative angle bending device of claim 1, wherein: The bottom angle of the flanging groove (701) is 90°, the bottom angle of the flanging groove (701) is concave inwardly formed with a circular groove (702) with a notch in the radial section, and the notch is communicated with the flanging groove (701), the inner diameter of the circular groove (702) is matched with the outer diameter of the rotating flanging block, so that the rotating flanging block can be rotatably embedded in the circular groove (702); the negative angle concave part (17) is arranged to face the notch and the flanging groove (701).
3. The one-step negative bend forming device of claim 2, wherein: The negative angle concave part (17) includes a first side (171) which can be attached to the bottom surface of the negative angle convex part (16) and a second side (172) which can be attached to the side surface of the negative angle convex part (16); when the bottom surface of the punch (1) is attached to the bottom surface of the flanging groove (701), the first side (171), the bottom surface of the negative angle convex part (16), the bottom surface of the punch (1) and the bottom surface of the flanging groove (701) are located in the same horizontal plane, and the second side (172) is located in the flanging groove (701); when the punch (1) is removed from the flanging groove (701), the second side (172) is located in the circular groove (702).
4. The one-step negative bend forming device of claim 2, wherein: The rotating flanging block is provided with a flanging block spring fixing pin (15), the concave die (7) is provided with a concave die spring fixing pin (9), the flanging block spring fixing pin (15) and the concave die spring fixing pin (9) are connected through a spring (14), so that the rotating flanging block can rotate in the circular groove (702) through the spring (14).
5. The one-step negative bend forming device of claim 1, wherein: The concave die (7) is provided with a rotating flanging block stop block (11) which presses the end of the rotating flanging block.
6. The one-step forming negative angle bending device according to claim 1 or 5, characterized in that: The top of the concave die (7) is provided with a guide column (5), and the upper die plate (3) is embedded with a guide sleeve (4), and the upper part of the guide column (5) is movably penetrated through the guide sleeve (4).
7. The one-step negative bend forming device of claim 6, wherein: The top of the concave die (7) is provided with a positioning block (6).
8. The one-step negative bend forming device of claim 1, wherein: The top of the punch (1) is installed on the upper die plate (3) through the punch stop block (2) on both sides.