Influence of Surface Quality on Performance of Machined Parts
Surface quality is an important indicator to evaluate the performance of machined parts. It has a direct impact on the usability and service life of the parts. The surface quality includes such indicators as surface roughness, waviness, shape accuracy, sharp edges and burrs, etc. Therefore, the improvement of surface quality is an important task for machining process.
Surface finish is of great importance for machining parts. In addition to ensuring the tightness between the components of the parts, it also affects the performance of the parts in terms of wear resistance, fatigue strength, temperature resistance and pressure resistance. The surface integrity of a machined part seriously affects its overall performance, and the performance of each indicator also directly affects the performance of the parts.
In machining process, due to the wear of the cutting tools, irregular movement of the cutting parts, resulting in a certain difference between the theoretical precision and the actual precision of the processed parts. Therefore, it is necessary to reduce the cutting force reasonably, reduce the cutting temperature and slow the tool wear, so as to obtain better surface quality. Furthermore, the improvement of the surface finish of the parts by smoothing can also make the parts have a certain fatigue strength and corrosion resistance.
The improved surface quality will benefit the performance of the parts in other aspects. However, for parts with deep features or complex features, it is not easy to achieve good surface integrity. In this case, the cutting tools used need to be further improved. It is necessary to select the appropriate cutting tools and cutting parameters according to the specific conditions of the machined part, so as to reduce the cutting force, improve the surface roughness of the part and reduce the cutting temperature to prevent the tool wear.
At the same time, it can also be based on the requirements of the machined part, to carry out suitable post-processing, such as polishing, honing and grinding and so on, to reduce the defects of the workpiece surface and improve the surface integrity of the workpiece. Therefore, improving the surface quality of machined parts can improve the overall performance of the parts, and promote its long-term use.
In conclusion, the surface quality of machined parts is an important indicator for product performance, and its improvement is an essential part for parts processing. In the process of parts machining, reasonable selection and rational use of cutting parameters are the key to obtain metallographically qualified surface quality. The post-processing should be used to further improve the surface quality and make the performance of the parts better.
