Precision machining, not what materials can be precision machining, some materials are too hard, more than the hardness of the processing machine parts, it may crash the machine parts, so these materials are not suitable for precision machining, unless the machine parts made of special materials, or laser cutting. So what are the material requirements for precision parts processing? Here we come together to understand it.
For precision machining materials are divided into two categories, metal materials and non-metallic materials.
For metal materials, the hardness of stainless steel is the largest, followed by cast iron, followed by copper, and finally aluminum.
And the processing of ceramics, plastics, etc. belongs to the processing of non-metallic materials.
1, first of all, the requirements of the material hardness, for some occasions, the higher the hardness of the material is the better, just limited to the hardness requirements of the processing machine parts, processing materials can not be too hard, if harder than the machine parts can not be processed.
2, secondly, the material soft and hard moderate, at least one grade lower than the hardness of the machine, but also to see what the role of the processed device is to do with a reasonable selection of materials for machine parts.
In short, precision machining of the material requirements or some, not what material is suitable for processing, such as too soft or too hard material, the former is not necessary for processing, and the latter is not processed.
Therefore, before processing must pay attention to the density of the material, if the density is too large, equivalent to the hardness is also very large, and if the hardness exceeds the hardness of the machine parts (lathe turning tool), it is impossible to process, not only will damage the parts, but also cause danger, such as turning tool flying out of the crash injury. Therefore, in general, for mechanical processing, the material material should be lower than the hardness of the machine tool, so that it can be processed.