Differences between cold stamping and stretching in aluminum product processing technology

Punching of aluminum products
1. Cold punching
Use material aluminum particles. Using an extrusion machine and a mold for one-time molding, suitable for cylindrical products or product shapes that are difficult to achieve in stretching processes, such as elliptical, square, and rectangular products. (As shown in Figure 1 Machine, Figure 2 Aluminum Particle, and Figure 3 Product)
The tonnage of the machine used is related to the cross-sectional area of the product. The gap between the upper die punch and the lower die tungsten steel is the wall thickness of the product, and the vertical gap to the bottom dead center when the upper die punch and the lower die tungsten steel are pressed is the top thickness of the product. (As shown in Figure 4)
Advantages: Short mold opening cycle and lower development cost compared to stretching molds.
Disadvantages: The production process is long, the product size fluctuates greatly during the manufacturing process, and the labor cost is high.
2. Stretch
Use material aluminum sheet. Utilizing continuous die machines and molds for multiple deformations to meet the shape requirements, suitable for non cylindrical bodies (aluminum products with bending). (As shown in Figure 5 Machine, Figure 6 Mold, and Figure 7 Product)
Advantages: Complex and repeatedly deformed products have stable dimensional control during the production process, and the product surface is relatively smooth.
Disadvantages: High mold cost, relatively long development cycle, and high requirements for machine selection and accuracy.