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What Are the Precautions for Processing Aluminum Stamping Parts and the Requirements for Molds?

Aluminum stamping parts are stamping parts made of aluminum material. The stamping processing factory needs to be familiar with the characteristics of aluminum material and how to ensure that adverse phenomena are avoided during stamping process. For example, when aluminum stamping parts are bent or processed and then anodized, cracking may occur. Let us understand the precautions for aluminum stamping parts processing together.

Precautions for aluminum stamping parts processing


In terms of thickness, if possible, choose materials with smaller thickness.

Choose aluminum sheet with suitable hardness

If the hardness of the chosen aluminum sheet is too high, cracking is prone to occur. Suitable hardness of aluminum sheet should be chosen for aluminum hardware stamping processing. The hardness of series 1, 3, and 5 aluminum plates is relatively low and is commonly used. The hardness of series 6 and 7 aluminum plates is relatively high, so they need to be annealed to the 0 state before stamping. Also, be sure to choose aluminum plates produced by more regular manufacturers to ensure quality.

Texture direction

When processing aluminum metal stamping parts, the aluminum stamping direction should be perpendicular to the rolling direction of the aluminum plate.

Selection of R angle for stamping

When stamping and bending, the selection of the R angle is also very important. Cracking is prone to occur if the R angle is too small.

Surface treatment

For aluminum stamping parts that require wire drawing or other surface treatment, surface treatment should be carried out after forming.

What are the requirements for molds in aluminum stamping parts processing?

Before any stamping processing, the stamping die must be designed. Today we will take a look at the molds used for processing aluminum stamping parts, their requirements and differences.

The aluminum stamping processing plant should pay special attention to the following aspects when manufacturing molds:

  • Try to arrange the punching as much as possible at the back without affecting the number of processes. For products with a large number of punching holes, it is possible to consider adding one more process even if the punching holes are arranged at the back;

  • When bending and forming, since aluminum material is prone to produce aluminum shavings during bending, which will cause point damage and indentation, the raw aluminum material should be covered with a PE film. For roller and electroplating, polished hard chrome plating is the best choice for the forming block;

  • For aluminum stamping parts that require anodizing, if there are flattening and pushing processes of 180°, the product cannot be completely compressed. Complete compression will cause acid vomiting. A gap of 0.2-0.3mm must be left to allow the acid to flow smoothly and timely. Therefore, a limit block must be made in this process and the mold height should be marked higher than the mold;

  • Aluminum material is relatively soft and the mold is easy to clog. Therefore, when designing the mold clearance, a clearance of 10% of the double-sided material thickness should be placed. The straight depth of the cutting edge should be 2mm, and the taper should be 0.8-1°.

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