A fine blanking die structure for reducing blanking corner

Abstract

The utility model discloses a kind of fine blanking die structure for reducing punch collapse angle, including upper die punch, punch guide plate, with the lower die and reverse top mechanism of cooperation work of upper die punch.The punch guide plate is externally jacketed on the outer ring of upper die punch by letting go of through-hole being set on it and cooperating with upper die punch.The punch guide plate of the outer ring of upper die punch is set with guide boss by being let go of.The V-shaped gear ring cooperating with guide boss is set on the lower die.Under the action of guide boss, the deformation of raw material in punching part is caused.The V-shaped gear ring forms the closure to the deformation of the bottom of punching part located in the outer ring of guide boss, so that the raw material in punching part extends deformation to central part, and simultaneously, the oblique angle recess of reverse top mechanism outer ring is matched, and pre-filling to punching edge is realized.Three mutual actions improve the flow of raw material in punching part, and effectively reduce the generation of punch collapse angle.

Description

Technical Field

[0001] This utility model belongs to the field of precision blanking technology, specifically relating to a precision blanking die structure for reducing blanking collapse angle. Background Technology

[0002] In existing technologies, fine blanking is widely used to process high-precision, high-quality parts, such as gears, gaskets, and electrical components. Fine blanking requires dies to precisely shear the material under extremely high pressure to obtain smooth, accurate cut edges. However, due to the plastic deformation of the material and stress concentration during the shearing process, corner collapse often occurs at the cut of the workpiece.

[0003] Corner collapse not only affects the appearance of a product, but also leads to difficulties in subsequent assembly and a decline in performance. Therefore, in order to improve the quality of fine blanking workpieces, the industry needs a corresponding fine blanking die structure to reduce or eliminate the phenomenon of corner collapse during blanking. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, this utility model provides a fine blanking die structure for reducing the blanking collapse angle, so as to solve the technical problem that fine blanking dies are prone to collapse during the blanking process.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows:

[0006] A fine blanking die structure for reducing blanking collapse includes an upper die punch, a punch guide plate, and a lower die and a counter-ejection mechanism that cooperate with the upper die punch. The punch guide plate has a clearance through-hole that mates with the upper die punch. The punch guide plate is fitted over the outer ring of the upper die punch through the clearance through-hole. A guide protrusion is provided around the outer ring of the clearance through-hole in the punch guide plate.

[0007] The lower die is provided with a V-shaped toothed ring that mates with the guide protrusion. The V-shaped toothed ring is located on the outer ring of the projection of the guide protrusion onto the lower die. The outer ring of the anti-ejection mechanism is provided with an angled groove.

[0008] Furthermore, in the initial state, the bottom of the guide bump is lower than the bottom surface of the upper die punch.

[0009] Furthermore, the apex angle of the V-shaped gear ring is 90°.

[0010] Furthermore, the bottom surface of the guide protrusion is provided with a guide slope. In the direction from the outer ring towards the center, the guide slope gradually slopes upward.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] This invention features a punch guide plate with a guide protrusion on the outer ring of the upper die punch. A V-shaped toothed ring that mates with the guide protrusion is provided on the lower die. Under the action of the guide protrusion, the raw material in the punched part deforms. The V-shaped toothed ring forms a seal around the bottom deformation of the punched part located on the outer ring of the guide protrusion, causing the deformed raw material in the punched part to extend its deformation towards the center. Simultaneously, in conjunction with the angled groove on the outer ring of the anti-ejection mechanism, pre-filling is achieved at the punching edge. The interaction of these three elements improves the flow of raw material in the punched part, effectively reduces the occurrence of punching collapse, enhances the product's aesthetics, and improves its performance in subsequent assembly and use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall mold structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the punch guide plate and the lower die in this utility model. Figure 1 (Enlarged view of part A in the middle)

[0015] Figure 3 This is a schematic diagram showing the relative positions of the upper die punch and the guide protrusion in the mold closed state of this utility model;

[0016] Figure 4 This is a schematic diagram showing the position of the upper die punch in the die-cutting state of this utility model.

[0017] Reference numerals in the attached drawings: 1. Upper die punch; 2. Punch guide plate; 3. Lower die; 4. Anti-ejection mechanism; 5. Guide protrusion; 6. V-shaped toothed ring; 7. Angled groove. Detailed Implementation

[0018] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper side", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] like Figure 1As shown, a fine blanking die structure for reducing blanking collapse angle includes an upper die punch 1, a punch guide plate 2, a lower die 3, and a counter-ejection mechanism 4. The upper die punch 1 is mounted on an external drive source and can be pressed down or raised vertically. The lower die 3 has a blanking hole that mates with the upper die punch 1. The counter-ejection mechanism 4 is disposed within the blanking hole and has an elastic mechanism at its bottom, which allows it to descend synchronously with the upper die punch 1 when pressing down on the blanking part, providing upward support to the blanking part.

[0021] like Figure 2 As shown, the punch guide plate 2 has a clearance through hole that mates with the upper die punch 1. The punch guide plate 2 is fitted onto the outer ring of the upper die punch 1 through the clearance through hole. A guide protrusion 5 is provided on the outer ring of the clearance through hole in the punch guide plate 2, and initially, the bottom of the guide protrusion 5 is lower than the bottom surface of the upper die punch 1. When the mold closes, the upper die punch 1 and the punch guide plate 2 press down synchronously. The guide protrusion 5 located at the bottom of the punch guide plate 2 preferentially compresses and deforms the blanking part.

[0022] The lower die 3 is provided with a V-shaped toothed ring 6 that cooperates with the guide protrusion 5. The V-shaped toothed ring 6 is located on the outer ring of the projection of the guide protrusion 5 on the lower die 3. When the guide protrusion 5 presses down on the blanking part, it can form a closure on the bottom deformation of the blanking part located on the outer ring of the guide protrusion 5, so that the deformed raw material in the blanking part extends and deforms towards the center.

[0023] The outer ring of the anti-ejection mechanism 4 is provided with an angled groove 7, which is used to receive the raw material in the blanking part pushed by the downward deformation of the guide protrusion 5 on the punch guide plate 2. The raw material fills the blanking area formed between the angled groove 7 and the inner wall of the die, realizing the pre-filling of the blanking edge.

[0024] In this embodiment, the apex angle of the V-shaped gear ring 6 is 90°.

[0025] In some embodiments, the bottom surface of the guide protrusion 5 is provided with a guide slope. In the direction from the outer ring to the center, the guide slope gradually slopes upward, so that when the guide protrusion 5 extrudes the blanking part, the raw material on the blanking part can be further guided towards the center through the guide slope.

[0026] The working principle of this utility model is as follows:

[0027] like Figure 3 and 4As shown, when the mold closes, the upper die punch 1 and the punch guide plate 2 press down simultaneously. The guide protrusion 5 located at the bottom of the punch guide plate 2 preferentially contacts the blanking part and cooperates with the lower die to compress and deform it. When the guide protrusion 5 presses down on the blanking part, the V-shaped toothed ring 6 located on the lower die 3 forms a seal on the bottom deformation of the blanking part located on the outer ring of the guide protrusion 5, so that the deformed raw material in the blanking part extends and deforms towards the center, so that the raw material on the blanking part fills the blanking area formed between the beveled groove 7 and the inner wall of the die, realizing the pre-filling of the blanking edge, thereby reducing the collapse of the upper die punch 1 during subsequent blanking.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fine blanking die structure for reducing blanking collapse angle, comprising an upper die punch (1), a lower die (3) cooperating with the upper die punch (1), and a counter-ejection mechanism (4), characterized in that: It also includes a punch guide plate (2). The punch guide plate (2) is provided with a clearance through hole that cooperates with the upper die punch (1); the punch guide plate (2) is sleeved on the outer ring of the upper die punch (1) through the clearance through hole; the outer ring of the clearance through hole in the punch guide plate (2) is provided with a guide protrusion (5). The lower die (3) is provided with a V-shaped toothed ring (6) that cooperates with the guide protrusion (5); the V-shaped toothed ring (6) is located on the outer ring of the guide protrusion (5) projected on the lower die (3); the outer ring of the anti-top mechanism (4) is provided with an angled groove (7).

2. The fine blanking die structure for reducing blanking collapse angle according to claim 1, characterized in that: In the initial state, the bottom of the guide bump (5) is lower than the bottom surface of the upper die punch (1).

3. The fine blanking die structure for reducing blanking collapse angle according to claim 1, characterized in that: The V-shaped gear ring (6) has a 90° apex angle.

4. The fine blanking die structure for reducing blanking collapse angle according to claim 1, characterized in that: The bottom surface of the guide protrusion (5) is provided with a guide slope; in the direction from the outer ring to the center, the guide slope gradually tilts upward.

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