The solution to the rebound of waste material in stainless steel mesh punching

The Dongguan precision punching processing plant has written in the previous article the reasons for the rebound of waste in the stamping of stainless steel mesh, pores, small holes, and micro holes. Today the author will talk about the solution to the rebound of stamping waste. . The methods to solve the scrap rebound in punching and stamping are as follows: Increase the push of the punch. For molds with large gaps, we can increase the length of the punch, so that it will go deeper into the die hole and push the waste into the die hole. In the deeper position, if the punch is large, the ejector pin can be installed, and the ejector pin is used to push the waste into the deeper position of the cavity. Choose the smallest lower limit value for the gap between the concave and convex molds, so that the mesh section has two bright bands, and the scrap of the mesh remains in the hole of the concave mold. The tension will be greater, so that the scrap is not easy to rebound. . The form of the punch with the inclined knife edge can also prevent the scrap from jumping back. The scrap is separated by bending and stamping at the angle of the inclined knife. There is a bending elastic rebound deformation, which just forms a rebound and tightening effect in the female mold, which can support the waste. Tightly fit in the die hole. This method uses a metal material with a high coefficient of elasticity. The spring ejector pin device is used to install in the punch with a diameter of 6mm or more. After the stamping and separation is completed, the ejector pin pushes the mesh waste into a deeper position in the cavity. Play the role of preventing the scrap from rebounding. The silicone rubber block is used when the spring ejector pin cannot be installed. The diameter of the punch is generally less than 6mm, which is suitable for thin stamping materials. The design of the die edge, the straight edge of the die is used to enhance the coefficient of friction between the edge and the scrap to prevent the scrap from rebounding; the edge wall can be set with rough surface processing to make the roughness formed on the edge wall produce frictional resistance and prevent the scrap from rebounding; A certain size of the die port is processed into a retrograde cutting edge, and the certain size of the edge of the die edge is processed into an inverted flared edge form, so that the mesh is broken and separated according to the larger size of the die horn. The shape size of the die is larger than the size of the cutting edge of the die that is pushed down. The waste is pushed into the die by the punch with a certain amount of interference, forming a transitional tight fit with the die hole, effectively preventing the scrap from jumping back. This method is used There are more than the above methods for mesh processing of a certain thickness of material to prevent the waste from jumping back in the punching and stamping process. There are other methods such as reducing the use of lubricating oil and compressed air stripping devices.