What is the difference between spinning and punching?

Through processing, metal can be transformed into various shapes, such as lampshades, shrink tubes, barrels, basins, etc., which bring convenience to people's life and production. Generally speaking, metal processing and forming methods are spinning, stamping, forging, casting and other methods. From the perspective of raw material cost savings, spinning and punching are more commonly used metal processing methods. What is the difference between these two processing methods?
1. Different processing principles
During the spinning process, the flow and deformation of the blank are controlled by the walking path of the spinning wheel. Punching controls the flow of the material by the cooperation of the upper and lower convex and concave dies.
2. Different processing technology
For some hardware products with simple shapes, the punching process generally includes cutting materials, forming, cutting edges and other basic processes. The forming process of some products also needs to go through multiple stretches and various processes. However, the processing speed of punching is fast, and multiple products can be processed at one time; the other is convenient, rotary processing, forming and cutting can be completed on the CNC rotary machine tool at the same time, but only one product can be processed at a time, and the processing speed is slow; for some long-drawn Punching forming is easy to cause product cracking, and spinning processing is easier to complete product forming.
3. Different molds for processing
For hardware forming products of the same shape, spinning only needs to manufacture one core mold, while punching needs to manufacture two convex and concave molds, and the manufacturing cost of the mold is usually 3-6 times that of the spinning pressure. In the production cycle, the manufacturing time of the rotary die is shorter than that of the punching die, and the adjustment of the die size is more convenient.
4. The cost of processing materials is different
The material thinning rate of spinning processing can generally reach 30%, the thinning rate of punching is about 10%, and the spinning thinning rate is relatively large. The thickness of metal materials that can be processed by our CNC spinning machines can reach up to 0.5mm. Punching generally requires 5-10mm blank blanks, and the cost of materials required is high.
5. The surface and performance of the processed product are different
The surface of the product processed by spinning has circularly distributed rotating pressure lines, while the surface of the product processed by punching has stretch marks distributed vertically. In terms of product strength, spinning can make the arrangement of metal particles tighter and increase the metal density, so the strength of spinning processed products will be far better than that of punching products.