At present, precision parts processing has been done better and better in the processing industry. It is because of its excellence that it has brought us a lot of convenience, and the scope of its use has become wider and wider.
Precision parts processing refers to the whole process of making raw materials (or semi-waste) into products. For precision parts processing, including transportation and storage of raw materials, production preparation, blank manufacturing, parts processing, heat treatment, product assembly, and debugging, painting and packaging, etc. The content of precision parts processing is very common. Modern enterprises use the principles and methods of system engineering to organize and guide consumption, and regard precision parts processing as a consumption system with input and output.
When processing precision parts, the process of modifying the shape, size, position, and nature of the processed object to make it waste or semi-waste is called the process. This is a major part of the machining process. It is divided into casting, forging, stamping, welding, machining, assembly and other processes. The mechanical manufacturing process generally refers to the sum of the mechanical processing process and the machine assembly process. Other processes are called auxiliary processes, such as transportation, storage, and power. supplies, equipment maintenance, etc. The process is composed of one or several procedures arranged in sequence, and one procedure is composed of multiple steps.
When processing precision parts, various reasons will be encountered, the product will also be affected, and the quality will decline. So what are the reasons for the failure of precision parts processing?
The reasons for the machining failure of precision parts are analyzed from four aspects: material, installation and use, processing and design.
1. In terms of materials, improper selection of materials is the main reason for the failure of materials. In most cases, designers only make decisions based on the conventional performance indicators of materials, and the defects of materials themselves are also one of the reasons.
2. Installation and use When installing and using components that have failed, if the fit is too loose, too tight, the fixation is not firm, the centering is bad, and the operation is improper, all of them will lead to failure in use.
3. In terms of processing, due to poor processing technology control, various defects will be formed and cause failure. For example, improper process control can cause overheating, insufficient tempering, decarburization, etc. Phenomena such as high temperature or overheating. Poor cooling process will result in low brightness, deep knife marks, grinding cracks, etc., which may cause the failure of parts.
4. The reason for the design is that the unreasonable structure and shape of the design lead to the failure of the part, such as the obvious stress concentration in the high stress area of the part. The second is the erroneous estimation of the working state of the components, such as insufficient estimation of the possible overload in the work, so that the designed components cannot bear enough load.