CNC precision machining requirements for materials

CNC precision machining, not all materials can be processed by CNC precision machining. Some materials are too hard, exceeding the hardness of the machined parts, and the parts may collapse, so these materials are not suitable for precision machining. Machined, unless parts made of special materials, or laser cut.

Materials for precision machining are divided into two categories, metallic materials and non-metallic materials.

For metal materials, the hardness is the highest in stainless steel, followed by cast iron, followed by copper, followed by 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 requirements of the machined parts and the material to be processed. Not too hard, if it is harder than the machine, it cannot be processed.

2. Secondly, the material should be moderately soft and hard, at least one grade lower than the hardness of the machine parts. At the same time, it also depends on the function of the machined parts and the reasonable selection of materials for the parts.

In short, 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 is impossible. processing.

Therefore, the basic one of Z is that you must pay attention to the density of the material before processing. If the density is too high, it is equivalent to a large hardness, and if the hardness exceeds the hardness of the machine parts (lathe turning tools) , it cannot be processed, it will not only damage the parts, but also cause danger, such as the turning tool flying out and hurting people. Therefore, in general, for mechanical processing, the material quality should be lower than the hardness of the machine tool, so that it can be processed.

What are the processing requirements of Changzhou mechanical parts?

For precision parts, the processing is very strict, and the processing procedures include feeding and feeding. There are specific requirements for the size and accuracy, such as 1mm plus or minus how many microns, etc. If the size is too wrong, it will become a waste product. At this time, it is equivalent to reprocessing, which is time-consuming and laborious, and sometimes even makes the entire processing material scrap. This results in an increase in cost, and at the same time, the parts are definitely not usable.

For the processing of precision parts, the main requirements are the size, such as the diameter of the cylinder, there are strict requirements, the positive and negative errors are within the specified requirements to be qualified parts, otherwise they are unqualified parts ; There are also specific and strict requirements for length, width and height, and positive and negative errors are also specified. For example, a built-in cylinder (take Z simple basic components as an example), if the diameter is too large and exceeds the allowable error range, it will cause plugging. In the case of not going in, if the actual diameter is too small and exceeds the lower limit of the allowable negative value of the error, it will cause the insertion to be too loose and the problem of not firmness will occur. These are all unqualified products, or the length of the cylinder is too long or too short, beyond the allowable range of error, all of which are unqualified products, and they must be scrapped or reprocessed, which will inevitably increase the cost.

The above are the requirements for the processing of precision parts, which is the main size problem. It must be processed in strict accordance with the additional drawings. The actual size of the processed will definitely not be the same as the theoretical size of the drawings. However, as long as the machining dimensions are within the allowable tolerance range, they are all qualified parts. Therefore, the requirement for precision parts machining is to process them in strict accordance with the theoretical dimensions.

The second is advanced precision parts processing equipment and testing equipment. Advanced processing equipment makes it easier to process precision parts, with higher precision and better results. The testing equipment can detect the parts that do not meet the requirements, so that all products sent to customers truly meet the requirements.

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