In the precision parts processing, the product will be affected by the quality for various reasons, resulting in product processing failure. And there are several reasons that cause this consequence, and now we shall talk about the reasons for the failure of parts processing. The reasons for product failure can be summarized as four aspects: materials, installation and use, processing and design.
1, material reasons for improper selection of materials is the main reason for the failure of the material side. Commonly, the designer only based on the conventional performance indicators of the material to make decisions, the material itself defects are also among the reasons.
2, installation and use and has failed when the installation of parts, with too loose, too tight, fixed not prohibited, poor alignment and improper operation may cause the use of failure.
3, processing due to poor control of the processing process can cause a variety of defects and cause failure. Such as improper control of heat treatment process leads to overheating, insufficient tempering, decarburization, etc. Overheating or overburning and other phenomena. Poor cold machining process will cause the finish is too low, tool marks are too deep, grinding cracks, etc. can lead to the failure of the parts.
4, design reasons one is due to the design of the structure and shape is not reasonable to cause parts failure, such as parts of the high stress area there is an obvious source of stress concentration. Second, the working conditions of the parts are incorrectly estimated, such as the possible overload in the work is not estimated enough, so that the designed parts of the load-bearing capacity is not enough.
