What are the polishing methods for copper? What are the precautions?

There are three common polishing methods for copper, all of which can achieve ideal results: 1. Hand grinding (commonly known as polishing), namely: sanding, grinding wheel, cloth wheel. 2. Vibration polishing (vibration polishing), that is, rough grinding, semi-fine grinding and fine grinding. 3. Vibration chemical polishing, that is, fine grinding and adding chemical polishing solution. Because the traditional first and second methods are not only time-consuming and laborious, now we will introduce the third polishing method and process in detail: 1. Select vibration grinder (preferably with frequency conversion controller) 2. Choose abrasive: (high frequency porcelain or high alumina porcelain) 3. Selection of auxiliary chemicals: (copper weak corrosive agent, copper polishing agent) The operation steps are as follows: 1: Add polishing on the vibration grinder. The addition of polishing stone is 60% of the capacity of vibration mill, and the ratio of product input to polishing stone is 1: 2 or 1: 3. Rinse with water for 3-5 minutes, drain until there is only a small amount of water on the machine, and add grinding liquid, the ratio of grinding liquid to product is 3KG: 100KG. When grinding, copper. Because the liquid medicine oxidizes the product (its function is: after the liquid medicine corrodes the surface, the surface of the product will become softer, and then the soft layer will be gently wiped off with a delicate grindstone, so that the surface of the product will change from rough to smooth and finally become very smooth), so the liquid medicine will have a lasting drug effect for a certain period of time, which is about 1-2 hours. After the drug effect passes, the surface of the product will gradually change from gray to copper. At this time, you can check according to your company's quality requirements to see if it meets your company's requirements. If not, you can continue to repeat the above operation after cleaning, that is, grinding again. If it meets the requirements of the company, you can continue the next operation, and you need to rinse the residual liquid medicine in the machine.