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Precision machinery parts processing surface quality how much effect on its performance

by:Xavier      2020-05-11
Precision machinery parts processing surface quality on how to use the performance impact after completion of precision machinery parts processing, are all involved in the assembly work, all its processing quality influences the quality of mechanical equipments. So its surface quality have an effect on what aspects? Performance basic mechanical parts are done by the geometric shape and surface quality, so the precision machinery parts processing surface has great influence on the performance of its use, including the following contents: effect on fatigue strength: artifacts by changes of load, if the surface defects such as crack, gap, sharp corners, it is easy to cause stress concentration and the defect parts to produce fatigue crack, the expansion of the fatigue crack causes the inside part of the fatigue damage of parts. Usually, precision metal processing parts of the influence of surface roughness on the fatigue strength is larger, the smaller the value of surface roughness, surface defects such as cracks is less, its fatigue resistance will increase, so the grinding precision parts processing, significantly better than the fatigue strength of machine parts. Cold work hardening is have obvious effect on the fatigue strength of parts, the surface of cold work hardening can be formed on the surface of precision machinery parts processing a hardening layer and the hardening layer of material than base material after the shape of plastic processing closely, it can effectively prevent the appearance of the surface fatigue crack and extended, so as to improve the fatigue strength of precision metal processing parts. Parts of fatigue is also under the influence of residual stress, surface residual compressive stress can prevent the surface fatigue crack growth, improve the fatigue strength of parts surface residual tensile stress will accelerate the surface fatigue crack extension. Fatigue strength of lower parts. Influence on wear resistance, surface strain hardening has important effect on precision metal processing parts wear resistance, under normal circumstances, the surface layer can work hardening increases the wear resistance of precision parts 0. 5 - 1 times. Other degree of cold work hardening on the surface of grinding machining method is small, and the grinding surface is more likely to burn. Grinding burn at the surface of the material form compared with normal condition changed a lot, can obviously reduce the wear resistance of precision metal processing parts. The above information is derived from the hardware machinery processing factory Xavier company in shenzhen. More products please click on the link to see http://www for details. 瓦乌。 cn/products- 155088 - 0 - 0. HTML product purchase link https://cfsshilihe. 1688. com/
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