Stamping die staggered one-sequence three-flanging structure

Abstract

The utility model discloses a stamping die staggered type one-sequence three-flanging structure which comprises an upper die (1) and a lower die (2), three filling male dies (3) are arranged in the lower die (2), the filling male dies (3) are connected to form a U shape, and the connecting positions of the filling male dies (3) intersect with one another. In the process of die pressing and returning, the intersecting positions of the three filling male dies (3) are staggered, when the upper die (1) is pressed downwards, the three U-shaped filling male dies (3) are separated from one another, when the filling male dies (3) are connected, the connecting positions of the filling male dies (3) are staggered up and down, the filling male dies (3) are mutually avoided and do not interfere with one another, all negative angles of a part are withdrawn, and therefore the negative angles of the part can be completely withdrawn. The front face normal piece taking is achieved, circumferential flanging is completed in one procedure, the problem that a flanging contour is not smooth in cutter connection is solved, and the problem that a cutting edge is gnawed due to the fact that the die is uneven in stress is solved.

Description

A staggered three-flanging structure for stamping dies Technical Field

[0001] This utility model belongs to the field of stamping die technology. Specifically, this utility model relates to a stamping die with an interlaced one-sequence three-flanging structure. Background Technology

[0002] In the automotive manufacturing industry, stamping dies aim to produce stable and qualified parts while minimizing the number of processes, reducing costs, and simplifying the structure. The hood outer panel, as one of the main automotive body panels, has very high requirements for its appearance and dimensions. Conventional methods divide the hood outer panel's perimeter into two processes, combining trimming and flanging into a single operation.

[0003] A patent specification with patent number 201820741002.X and publication date of January 11, 2019, discloses a mold structure for sequentially achieving three-sided negative angle clamping and flanging, belonging to the field of automotive body outer panel stamping mold technology. It includes an upper mold base, an upper pressure plate, a lower punch, a lower mold base, a straight flanging insert, a first lower pressure plate, a first nitrogen spring, a wedge slider, a first wedge flanging insert, and a second lower pressure plate; it also includes a first-sided negative angle clamping and flanging mechanism, a second-sided negative angle clamping and flanging mechanism, and a third-sided negative angle clamping and flanging mechanism; the first-sided negative angle clamping and flanging mechanism includes a movable punch, a cylinder, and a delayed nitrogen spring, with the first lower pressure plate and the first nitrogen spring fixed to the movable punch, the movable punch connected to the cylinder drive end, and the movable punch located behind the lower punch. This invention improves the springback of aluminum plates by using three-sided (front, left, and right) clamping and flanging, and applies a delayed nitrogen spring system to the unloading method of clamping and flanging, effectively realizing the automation of clamping and flanging.

[0004] In the existing technology, flanging is divided into two processes. There are differences in the positioning of the process parts and the machining of the punch datum. The flanging contour of the produced parts is unstable and occasionally there are uneven contours and steps. OP30 is both flanging and trimming. The flanging processing force is much greater than the trimming processing force. The mold is subjected to uneven force. The trimming edge is prone to chipping, causing the trimming edge to break, thus producing burrs on the parts. Summary of the Invention

[0005] The present invention aims to provide a staggered one-sequence three-flanging structure for stamping dies to prevent chipping.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a stamping die with an interlaced one-sequence three-flanging structure, including an upper die and a lower die, wherein the lower die is provided with a filling punch, there are three filling punches in total, the filling punches are connected in a U-shape, and the connection points of the filling punches intersect each other.

[0007] The filling punch is divided into a side punch and a transverse punch, with the side punch located at both ends of the transverse punch.

[0008] The ends of the side punches and the ends of the transverse punches are cross-fitted together.

[0009] The side punch is connected to the transverse punch at one end with a groove, and the end of the transverse punch is fitted into the groove.

[0010] The end of the side punch overlaps the upper surface of the transverse punch.

[0011] The upper mold is equipped with a U-shaped inclined wedge slider.

[0012] The upper mold is equipped with a pressure plate.

[0013] The upper mold is equipped with a cutting tool, and the lower mold is equipped with a trolley corresponding to the position of the cutting tool. The trolley is connected to the filling punch.

[0014] The technical effect of this utility model is that the outer cover of this structure can complete the circumferential flanging in one process, which reduces the problem of uneven joint of the flanging contour and solves the problem of uneven force on the mold and chipping of the cutting edge. Attached Figure Description

[0015] This manual includes the following figures, which illustrate the following:

[0016] Figure 1 is a schematic diagram of the upper die of a stamping die with an interlaced one-sequence three-flanging structure according to the present invention.

[0017] Figure 2 is a schematic diagram of the lower die of a stamping die with an interlaced one-sequence three-flanging structure according to the present invention.

[0018] Figure 3 is a schematic diagram of the staggered filling punches of a stamping die with a staggered one-sequence three-flanging structure as shown in Figure 2.

[0019] Figure 4 is a three-dimensional schematic diagram of the lower die of a stamping die with an alternating one-sequence three-flanging structure as shown in Figure 2.

[0020] The markings in the diagram are: 1. Upper die; 2. Lower die; 3. Filling punch; 31. Side punch; 32. Horizontal punch; 4. Inclined wedge slide; 5. Pressure plate; 6. Cutting tool; 7. Trolley. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution, and to facilitate its implementation.

[0022] A staggered three-flanging structure for stamping dies includes an upper die 1 and a lower die 2. The lower die 2 contains three filling punches 3 connected in a U-shape, with the connection points of the filling punches 3 intersecting each other. During the pressing and return processes, the intersections of the three filling punches 3 are staggered. When the upper die 1 presses down, the three U-shaped filling punches 3 separate and slide along the surface of the lower die 2. Because the connection points of the filling punches 3 are staggered vertically, the filling punches 3 avoid each other. Thus, when the upper die 1 presses down, the filling punches 3 do not interfere with each other during the separation process, achieving complete removal of the negative angle of the part and normal front part removal. This allows for the completion of circumferential flanging in one process, reducing the problem of uneven cutting edges at the flanging contour junction and solving the problem of uneven die force causing chipping of the cutting edge.

[0023] The filling punch 3 is divided into a side punch 31 and a horizontal punch 32. The side punch 31 is located at both ends of the horizontal punch 32. The side punch 31 is vertical and the horizontal punch 32 is horizontal. The two side punches 31 are located at both ends of the horizontal punch 32 to form a U-shape, which facilitates the subsequent completion of three-sided flanging.

[0024] The ends of the side punch 31 and the transverse punch 32 are arranged to cross and fit together; this avoids mutual interference during pressing or retraction, and prevents damage to the machine during operation due to mutual crossing.

[0025] The side punch 31 is connected to the transverse punch 32 at one end with a groove, and the end of the transverse punch 32 is fitted into the groove; so that the transverse punch 32 and the side punch 31 can intersect each other. When the end of the side punch 31 is connected to the end of the transverse punch 32, the existence of the groove makes the transverse punch 32 and the side punch 31 intersect each other and will not affect or collide with each other.

[0026] The end of the side punch 31 overlaps the upper surface of the horizontal punch 32. During the actual operation of the machine, the horizontal punch 32 will move first to fill into place, and the side punches 31 on both sides will move later to fill into place, fitting against the bottom of both ends of the horizontal punch 32, ensuring that they will not interfere with each other during the separation process of the filling punches 3.

[0027] The upper mold 1 is equipped with U-shaped inclined wedge sliders 4; as the upper mold 1 is pressed down, the inclined wedge sliders 4 descend with the upper mold 1, and the three U-shaped inclined wedge sliders 4 flip on three sides, and the front flange cutting block flips in the front, so as to realize the three-sided flipping of the outer panel of the machine cover and the circumferential flange.

[0028] The upper mold 1 is equipped with a pressure plate 5; as the upper mold 1 descends, the pressure plate 5 will press down on the part and provide pressure force.

[0029] The upper mold 1 is equipped with a cutting tool 6, and the lower mold 2 is equipped with a trolley 7 corresponding to the position of the cutting tool 6. The trolley 7 is connected to the filling punch 3. As the upper mold 1 descends, the cutting tool 6 will push the trolley 7 to move, thereby driving the filling punch 3 to move, so that the filling punch 3 fills the negative angle in place, completing the filling of the surface area of ​​the lower mold 2.

[0030] The technical effect of this utility model is that the outer cover of this structure can complete the circumferential flanging in one process, which reduces the problem of uneven joint of the flanging contour and solves the problem of uneven force on the mold and chipping of the cutting edge.

[0031] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A stamping die with an alternating three-flanged structure, comprising an upper die (1) and a lower die (2), characterized in that: The lower mold (2) is provided with a filling punch (3). There are three filling punches (3). The filling punches (3) are connected in a U-shape, and the connection points of the filling punches (3) intersect each other.

2. The staggered one-sequence three-flanging structure of a stamping die according to claim 1, characterized in that: The filling punch (3) is divided into a side punch (31) and a transverse punch (32), with the side punch (31) located at both ends of the transverse punch (32).

3. The staggered one-sequence three-flanging structure for stamping dies according to claim 2, characterized in that: The end of the side punch (31) and the end of the transverse punch (32) are cross-fitted together.

4. A stamping die with an interlaced, three-flanged structure according to claim 2 or 3, characterized in that: The side punch (31) is connected to the transverse punch (32) at one end with a groove, and the end of the transverse punch (32) is fitted into the groove.

5. The staggered one-sequence three-flanging structure for stamping dies according to claim 4, characterized in that: The end of the side punch (31) overlaps the upper surface of the transverse punch (32).

6. The staggered one sequence three flanging structure of a punch die according to claim 1, characterized in that: The upper mold (1) is provided with a U-shaped inclined wedge slider (4).

7. The staggered one sequence three flanging structure of a punch die according to claim 1, characterized in that: The upper mold (1) is provided with a pressure plate (5).

8. The staggered one-sequence three-flanging structure of a stamping die according to claim 1, characterized in that: The upper mold (1) is provided with a cutting tool (6), and the lower mold (2) is provided with a trolley (7) corresponding to the position of the cutting tool (6). The trolley (7) is connected to the filling punch (3).

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