Precision machining requirements for material

More precision parts processing to the material what are the requirements? Precision machining, not what materials can be precision machining, and some material hardness is too big, more than the hardness of the machining parts, can put the parts collapse, so the material is not suitable for precision machining, unless it is made of special material parts, or laser cutting. Materials are divided into two categories for precision parts processing, metal materials and nonmetal material. For metal materials, the hardness of stainless steel is the largest, followed by iron, followed by copper, the last is aluminum. And ceramic, plastic and other processing belongs to non-metallic materials processing. 1. First is on the material hardness requirements, for some occasion, material hardness is higher, the better, is only limited to machining parts hardness requirements, processing of materials can't be too hard, if than parts force will not be able to process. 2. Secondly, material is qualitative soft hard moderate, at least a grade lower than the hardness of the parts, but also to see what is the role of the device used for processing, rational selection of parts. In short, precision machining requirement for material or some, not what the material is suitable for processing such as too soft or too hard material, the former is necessary without processing, while the latter cannot be processed. So, the most basic one is, must pay attention to the density of the material before processing, if the density is too large, if is equal to the hardness is very big also, and hardness more than parts ( Lathe turning tool) Hardness, is unable to process, it will not only damage parts, also can cause dangerous, such as fly lathe tool slides out to hurt. So, in general, for machinery processing, material is lower than the hardness of machine tool, in this way can be processed. At present, the precision processing refers to processing precision is 1 ~ 0. (including 1 m, the surface roughness of Ra0. 1 to 0. 01 (including m's processing technology, but this line is along with the progress of the processing technology of changing, today's precision machining may be tomorrow's general. Precision processing to solve the problem, one is the machining accuracy, including the shape tolerance, dimensional accuracy and surface condition, sometimes presence of surface defects is also the core of the problem; Second, machining efficiency, good machining accuracy can be achieved with some processing, but difficult to obtain high machining efficiency. Precision machining should include micro machining and ultra micro machining and finishing processing technology.
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