Not all materials can be precisely processed. For example, if the material exceeds the hardness of the processing tool, the machine part will collapse, so these materials are not suitable for precision machining.
The materials processed by precision parts are divided into two categories, metallic materials and non-metallic materials. Among the metal materials, the hardness of stainless steel is relatively large, followed by cast iron, followed by copper, and finally aluminum. The processing of ceramics, plastics, etc. belongs to the processing of non-metallic materials.
1. The first is the requirement for the hardness of the material. For some occasions, the higher the hardness of the material, the better, but it is limited to the hardness requirement of the machined part. The machined material should not be too hard. If it is harder than the machine part, it will be unable to be processed. of.
2. Secondly, the material is moderately soft and hard, at least one grade lower than the hardness of the machine part. At the same time, it also depends on the purpose of the processed device and the rational selection of the machine part.
3. Precision machining still has some requirements for materials. Not all materials are suitable for processing, such as materials that are too soft or too hard. The former is not necessary for processing, while the latter cannot be processed.
Therefore, you must pay attention to the density of the material before processing. If the density is too large, the hardness is also large. If the hardness exceeds the hardness of the machine part (lathe tool), it will not be machined, not only will damage the part, but also It will cause danger, such as the turning knife flying out and hurting people. Therefore, generally speaking, for mechanical processing, the material must be lower than the hardness of the machine knife, so that it can be processed.