From the point of view of process design, the maximum thinning rate of aluminum plate should not exceed 17%, and attention should be paid to the design of fillet and draft angle to avoid boss as much as possible.

For steel plate, because its formability is better than that of aluminum plate, the maximum thinning rate is generally controlled within 20%. From the production point of view, because there are many scrap problems of aluminum parts, the repair rate generally reaches 65,438+00%, and the repair needs to be put into a special grinding room, so the repair cost is high. Comparatively speaking, the repair of steel plate does not need harsh environment, and the repair cost is much lower than that of aluminum plate.

The rebound of aluminum parts is large;

It is difficult to control and adjust the size of aluminum stamping parts. At present, the size coincidence rate of aluminum parts in the dies designed in Germany is not high, with an average of less than 70%, while the size coincidence rate of steel plate dies can generally reach more than 98%.

From the die point of view, because the elastic modulus of aluminum is only 1/3 of that of steel, the elastic recovery of aluminum plate after stamping fracture is more intense than that of steel. After the aluminum plate is broken, the compressive stress of the section contacting with the side wall of the punch is higher, the friction is more intense, and more heat is generated. Due to the viscosity of the aluminum plate itself, some substances on the cross section of the aluminum plate will adhere to the side wall of the punch, forming chip accumulation tumors, resulting in smaller stamping gaps and burrs.