1. In the case of no impact on the project number, although the punching is arranged at the back of the project, even for the products with a large number of punching, it can be studied to do more than one project, and the punching should also be arranged at the back of the project
2. The aluminum material is soft and the die is easy to plug. Therefore, when designing the die clearance, it is appropriate to place a clearance of 10% of the bilateral material thickness. The straight depth of the blade is 2mm, and the taper is 0.8-1 °
3. During bending forming, because aluminum chips are easy to occur during bending of aluminum material, it will form spot damage and indentation. Aluminum raw material needs to be pasted with PE film. Under the condition of roller and electroplating, polishing and hard chromium plating are preferred for forming block
4. For the metal stamping parts to be processed after anode, if there is a pressing and pushing process of 180 °, the product can not be fully pressed, and acid spitting will occur when the product is fully pressed. A 0.2-0.3mm seam shall be reserved so that the acid can flow out quickly. Therefore, the limit block shall be made in this process and the calibration die shall be higher than the die
5. Because the aluminum material is brittle and easy to crack, it is unique in the condition of reverse flanging. Therefore, although it is not necessary to make crimping, it is also necessary to make the crimping wider and shallower
6. All the cutting edges of aluminum parts are required to be cut with slow wire to prevent burr and rough blanking. The aluminum parts are easy to generate high temperature, so the hardness of the punch is required to be more than 60 °, at least SKD11 material is used, and D2 equal quality punch is not allowed
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