What should we pay attention to when processing aluminum plate?

1. The punching holes should be arranged behind the items without affecting the number of items. Even if it is a product with a large number of punching holes, you can consider doing one more project, and the punching holes should be ranked at the back.

2. The material of the aluminum plate is soft, and the mold is more likely to block the material. Therefore, when designing the mold gap, it is advisable to put a gap of 10% of the thickness of the material on both sides.

3. When bending and forming, because the aluminum plate is prone to produce aluminum scraps during bending, it will form point damage and indentation. The raw material of the aluminum plate needs to be covered with PE film. The shaped blocks are preferably polished and hard chrome plated in the roller and galvanized condition.

4. For the stamping parts that need to be processed after the anode, if the flattening and flattening process is 180°, the product cannot be completely pressed, and the phenomenon of acid spitting will occur when it is completely pressed. The liquid can flow out smoothly and in time, so in this process, a limit block needs to be made to calibrate the mold to a position higher than the mold.

5. Because the aluminum plate is relatively brittle and easy to crack, especially in the case of reverse folding, try not to make a crimping line, even if you do, make the crimping line wider and shallower.

6. All aluminum plate parts are required to be cut with slow-moving wire to prevent burrs and unsmooth blanking. Aluminum plate parts are prone to high temperature, so the hardness of the punch should be above 60°, at least with SKD11 material or above, and there should be no D2 poor punch.

The aluminum plate is relatively soft, so it is easy to cause top injury, crush injury, scratch and deformation during the stamping production process. In addition to the requirements for the mold, the following points must be done in the stamping production process:

(1) In order to stamp the aluminum plate parts well and reduce the defect rate, we must first do 5S, especially cleaning, including molds, punching table, assembly line, packaging materials, etc. There must be no sharp debris, and no dirt must be cleaned regularly. . The top and bottom of the mold must be clean and free of debris.

(2) If it is found that the product has large burrs, it must be sent to the mold for repair in time, and follow up to the result.

(3) The aluminum plate parts are more likely to heat up and become hard when they are stacked together. Therefore, when punching and blanking, it is necessary to apply some pressing oil on the material before punching (which can not only dissipate heat but also smooth the blanking).

(4) For products with more punching holes, the appearance of the mold should be punched and cleaned, so that the mold and the product are always clean and free of debris and reduce top damage. If top damage is found, it is necessary to find the top damage of the mold. Problems must be dealt with in order to continue production.

(5) Aluminum scraps will be generated when the mold push block is leveled, so after the push block is used up every day, the aluminum scrap on the push block must be cleaned up.

What are the common problems in sheet metal stamping processing?

Sheet metal processing parts have the characteristics of light weight, high strength, electrical conductivity (can be used for electromagnetic shielding), low cost, and good mass production performance. Widely used in electronic appliances, communications, automotive industry, medical equipment and other fields. With the increasing application of sheet metal parts, the design of sheet metal parts has become a very important part of the product development process. Mechanical engineers need to understand the design skills of sheet metal parts, so that the designed sheet metal parts can not only meet the requirements of product function and appearance, but also make the manufacture of stamping dies simple and low cost.

1. Common problems of stamping parts processing in sheet metal processing

1. Burrs: In the process of stamping or chamfering, the excess material is not completely left, and burrs appear under the section of the steel plate. According to the interface, when the burr height is greater than 0.2mm, the iron powder will damage the mold, causing convex and concave.

2. Unevenness: The surface of the material is abnormally convex and concave, which is caused by the uncoiled line. This is due to foreign objects (iron filings and dust) in 3.

3, caused by mixing. Roll marks: Caused by foreign matter adhering to the cleaning roller or feed roller (fixed spacing). Generally speaking, foreign objects printed on paper can be cleaned.

4. Scratches: Due to the rollers. Scratches may appear when the roller suddenly stops or accelerates.

5. Rolling may cause wrinkling at the edges: the guide rollers on the uncoiler line may cause wrinkling due to the small gap between the guide rollers on the die, which is caused by the unbalanced feeding of the rollers.

6. Scratches: The main reason for parts being scratched is that there are sharp scars on the mold or metal dust falls into the mold. Precautions are sanding mold marks and cleaning metal dust.

7. Bottom crack: The main reason for the bottom crack of the part is the poor plasticity of the material or the pressure of the die blank holder is too tight. The preventive measure is to replace the plastic material or loosen the edge holder.

8. Wrinkling of the side wall: The main reason for the wrinkling of the side wall of the part is that the material thickness is not enough when the upper and lower molds are installed (if it is relatively small, the thickness is allowed to be thinner) or deviation. This results in a larger gap on one side and a smaller gap on the other. The caveat is to immediately replace the material and readjust the mold.

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