Blanking die for improving surface quality of cold plate

Abstract

The utility model discloses a blanking die for improving surface quality of a cold plate, which comprises an upper die holder and a lower die holder, a first foot pad and a second foot pad are respectively arranged at one end of the upper die holder far away from the lower die holder, and a first upper die trimming knife, a second upper die trimming knife and a third upper die trimming knife are sequentially arranged at one end of the upper die holder close to the lower die holder. A pressing plate is arranged on one side of the first upper die trimming knife, one side of the second upper die trimming knife and one side of the third upper die trimming knife, a lower die trimming knife is arranged on the end face of the lower die base, and a waste cut-off knife is arranged on one side of the lower die trimming knife. The blanking die has the advantages that the upper die cutter block is made into a movable structure, the upper die cutter block is flat when a product is trimmed, and a waste cutter edge with offset can be formed when waste is cut off, so that the problem that a subsidence area is easy to form is avoided, and the blanking die is low in cost and suitable for mass production.

Description

Technical Field

[0001] The utility model relates to the technical field of trimming and cutting dies, in particular to a blanking die for improving the surface quality of cold plates. Background Technique

[0002] With the continuous development of the stamping industry and the continuous improvement of each process, higher requirements are also put forward in terms of product quality, among which the surface quality is one of the more important items.

[0003] At present, for some larger parts, such as cold plates of new energy vehicles, it is often necessary to cut the waste material during the trimming process. The traditional waste material cutting structure is that the lower die is made into a waste material knife, and the upper die knife is made into a step difference to cut the waste material. In this way, the tool with a higher angle will contact the product first, and on the side where the tool is lower, there will be a situation where there is no material pressing on the upper part of the product and no support on the lower part. In this way, a pit defect will be formed at a point near the product on the edge of the waste material knife. The factors affecting the size of the pit defect are mainly two:

[0004] (1) Material thickness, which is particularly obvious in thicker products. The trend is that the thicker the material thickness, the more obvious the pit at the waste material cutting place. The reason is that the punching material gap will be enlarged corresponding to the higher material thickness, and it is easy to form a collapse area.

[0005] (2) Material hardness, which is more obvious in products with low material hardness and is easy to form a collapse area.

[0006] In response to this defect, the current solution is full-circumference laser cutting. The main defects of this method are two:

[0007] (1) Unstable. Although the problem of pit defects is solved, the laser cutting edge line is not as stable as that of stamping parts, and the error of the edge line in different batches is relatively large;

[0008] (2) This method is not suitable for mass production and the cost is relatively high. Content of the Utility Model

[0009] The purpose of the utility model is to provide a blanking die for improving the surface quality of cold plates, so as to solve the problems raised in the above background technique.

[0010] To achieve the above purpose, the utility model provides the following technical solution: A blanking die for improving the surface quality of cold plates, including an upper die base and a lower die base. One end of the upper die base away from the lower die base is respectively provided with a first pad foot and a second pad foot. One end of the upper die base close to the lower die base is successively provided with a first upper die trimming knife, a second upper die trimming knife and a third upper die trimming knife. A pressure plate is arranged on one side of the first upper die trimming knife, the second upper die trimming knife and the third upper die trimming knife;

[0011] The end face of the lower die base is provided with a lower die trimming tool, and a waste cutting tool is arranged on one side of the lower die trimming tool.

[0012] Further optimized, an anti-side block is arranged on one side of the third upper die trimming tool.

[0013] Further optimized, a nitrogen cylinder fixing block is also arranged between the first foot pad and the second foot pad, and a nitrogen cylinder connected thereto is arranged at the lower part of the nitrogen cylinder fixing block.

[0014] Further optimized, the other end of the nitrogen cylinder away from the nitrogen cylinder fixing block abuts against the third upper die trimming tool.

[0015] Further optimized, a pressing block is arranged on one side of the lower part of the third upper die trimming tool.

[0016] Further optimized, a nitrogen spring is arranged between the upper die base and the blank holding plate.

[0017] Beneficial effects

[0018] The blanking die for improving the surface quality of the cold plate provided by the present utility model makes the upper die cutting block into a movable structure. When trimming the product, it is flat, and when cutting the waste, a waste cutting edge with a step difference can be formed, thus avoiding the problem of easy formation of a sunken area. At the same time, the cost of the blanking die is relatively low, and it is suitable for mass production. Description of the drawings

[0019] Figure 1 It is a schematic cross-sectional view of the overall structure of the present utility model;

[0020] Figure 2 It is a schematic side cross-sectional view of the overall structure of the present utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the upper die base of the present utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the lower die base of the present utility model. Specific implementation manners

[0023] The following are specific embodiments of the present utility model and in combination with the drawings, the technical solutions of the present utility model are further described, but the present utility model is not limited to these embodiments.

[0024] Embodiment

[0025] Such as Figures 1-4As shown in the figure, a blanking die for improving the surface quality of a cold plate includes an upper die base 8 and a lower die base 1. At one end of the upper die base 8 away from the lower die base 1, a first pad 10 and a second pad 11 are respectively provided. At one end of the upper die base 8 close to the lower die base 1, a first upper die trimming knife 5, a second upper die trimming knife 6 and a third upper die trimming knife 7 are successively provided. A pressure plate 13 is provided on one side of the first upper die trimming knife 5, the second upper die trimming knife 6 and the third upper die trimming knife 7.

[0026] A lower die trimming knife 3 is provided on the end face of the lower die base 1, and a waste cutting knife 2 is provided on one side of the lower die trimming knife 3.

[0027] In this embodiment, an anti-side block 14 is provided on one side of the third upper die trimming knife 7. A nitrogen cylinder fixing block 12 is also provided between the first pad 10 and the second pad 11, and a nitrogen cylinder 9 connected thereto is provided below the nitrogen cylinder fixing block 12.

[0028] The other end of the nitrogen cylinder 9 away from the nitrogen cylinder fixing block 12 abuts against the third upper die trimming knife 7.

[0029] A pressure block 4 is provided on one side below the third upper die trimming knife 7, and a nitrogen spring 15 is provided between the upper die base 8 and the pressure plate 13.

[0030] When the die is opened, the nitrogen cylinder is in the open state, so that the third upper die trimming knife moves downward to be flush with the second upper die trimming knife and the first upper die trimming knife. The nitrogen spring is also in the open state, and the pressure plate is also in the open state.

[0031] During the closing process of the die, the pressure plate first presses the product placed on the lower die trimming knife. The die continues to close, the stroke of the nitrogen spring is compressed, and the first upper die trimming knife, the second upper die trimming knife and the third upper die trimming knife cut the product with the lower die trimming knife during the downward movement.

[0032] The die continues to close. When the third upper die trimming knife presses the trimmed product waste and contacts the waste cutting knife, the stroke of the nitrogen spring is compressed. When the die continues to close, the first upper die trimming knife and the waste cutting knife cut the product waste, and the die is completely closed. Then the die is opened to complete a stamping process.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A blanking die for improving the surface quality of a cold plate, characterized in that: It comprises an upper die seat (8) and a lower die seat (1), wherein the end of the upper die seat (8) away from the lower die seat (1) is respectively provided with a first pad foot (10) and a second pad foot (11), and the end of the upper die seat (8) close to the lower die seat (1) is sequentially provided with a first upper die trimming knife (5), a second upper die trimming knife (6) and a third upper die trimming knife (7), and a pressing plate (13) is provided on one side of the first upper die trimming knife (5), the second upper die trimming knife (6) and the third upper die trimming knife (7); The end surface of the lower die seat (1) is provided with a lower die trimming knife (3), and one side of the lower die trimming knife (3) is provided with a waste cutting knife (2).

2. The blanking die for improving the surface quality of cold plate according to claim 1, characterized in that: A side-preventing block (14) is provided on one side of the third upper die trimming knife (7).

3. The blanking die for improving the surface quality of cold plate according to claim 1, characterized in that: A nitrogen cylinder fixing block (12) is also provided between the first foot (10) and the second foot (11), and a nitrogen cylinder (9) connected to the nitrogen cylinder fixing block (12) is provided at the lower part thereof.

4. The punching die for improving the surface quality of cold plate according to claim 3, characterized in that: The other end of the nitrogen cylinder (9) away from the nitrogen cylinder fixing block (12) abuts against the third upper die trimming knife (7).

5. The blanking die for improving the surface quality of cold plate according to claim 1, characterized in that: A pressing block (4) is provided on one side of the lower part of the third upper die trimming knife (7).

6. The blanking die for improving the surface quality of cold plate according to claim 1, characterized in that: A nitrogen spring (15) is provided between the upper die seat (8) and the pressing plate (13).

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