How to make the surface color of the products processed by cold heading consistent with the cold rolling process is a cold extrusion process, which works like multiple punches doing the same product, but only one of its punches. Process. In the production process of stamping parts, we all found that as long as the deformation occurs, there will be new prints, such as edges, corners, and appearance.
First of all, we can see how this thing is produced. In the process of stamping and cold heading, it has caused more or less damage to the surface of the material. We learned about the activities between molecules during the middle school and put the two substances for a long time. Together, there will be substances in the item A that have the item B. Moreover, the raw material of our cold-processed products is also a cold drawing process. After the cold drawing process, a phosphating process is generally used to make the material more smooth. However, an oxidation process occurs during material storage. It causes the scale to be produced, so after the cold heading process, there will be new marks in the place where the extrusion occurs. For example, the steps of the T-nut, the shrinkage of the shrink rod screw, and the end face of the round nut will all be similar. How can we solve it? Some people say electroplating. This method is ok if it is the same substance, but we have destroyed the material and oxidized the surface, so this can't solve the problem; then the grinder, if you see the engine pressure nut, these multiple rules You won't think so when you are a product. What should I do? There are certainly some ways to do this. We can carburize the cold-processed or stamped products and then phosphating the surface. The purpose of carburizing is to make the entire product surface under the same substance. The purpose of phosphating is to achieve color uniformity.
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