Precautions for turning copper screws
When turning copper screws, it is necessary to know that the copper content of pure copper under normal conditions is 99.5%, and the hardness of pure copper under annealing is generally 35-45HB. In order to ensure the processing quality of copper screws, the following items should be noted when processing copper screws.
When turning copper screws, it is necessary to know that the copper content of pure copper under normal conditions is 99.5%, and the hardness of pure copper under annealing is generally 35-45HB. In order to ensure the processing quality of copper screws, the following items should be noted when processing copper screws.
1. In the process of machining, chips may stick to the cutting edge, affecting the quality of copper screw machining and the service life of the tool.
2. The copper screw surface is easy to produce water like waveform and noise.
3. The expansion coefficient of pure copper is large. When cutting, deformation will occur due to high temperature, so it is difficult to master the size and accuracy of copper screw processing.
4. If the copper parts contain free cutting elements such as sulfur, the machinability of the copper parts will be affected. The toughness and plasticity of copper parts are relatively large, and the deformation generated during cutting is also large. Therefore, the cutter should be sharp, so that the cutting will be smoother, the temperature generated during cutting will be smaller, and the deformation of the copper sheet will be smaller.
If lead is added to copper parts, machinability and cutting speed will be greatly improved. There are many kinds of bronze with poor anisotropy, but the machinability of lead bronze is greatly improved.
In the processing of copper parts, the faster the cutting speed is, the smaller the cutting force is, so the deformation of copper parts in the processing process will be relatively small. The surface quality of copper alloy is very good, so there is no need for further finishing in the later stage. The faster the cutting speed is, the better the surface quality of the copper screw is.
