What are the factors that affect the performance of auto parts?

Due to the tool marks produced during the cutting process, the chips may be plastically deformed during the separation process due to friction between the tool and the workpiece surface and high-frequency vibrations of the machining system.
The machined surface roughness will directly affect the performance and service life of the part.
① Influence on wear resistance of parts
The rougher the surface of a machined part, the greater the coefficient of friction, and therefore the faster the relative moving surfaces wear. However, this does not mean that the surface is too smooth to reduce surface wear. Surfaces are too smooth to increase frictional resistance and accelerate wear due to the extrusion of lubricants or the adsorption of molecules.
② Influence on the stability of matching performance
The surface roughness of the part will have a certain effect on various fits. for clearance fit. Two parts with rough surfaces wear quickly during relative motion, which increases clearance and affects the nature of the fit. To create an interference fit, attention should be paid to microscopic peaks on the surface during assembly. It is easily extruded and plastically deformed, which reduces the actual effective interference after assembly and reduces the strength of the connection; for transition fits, surface roughness can also loosen the fit due to repeated use of pressure and hammer assembly.
③ Effect on fatigue strength
The failure of parts subjected to alternating loads is mainly caused by surface fatigue cracks. The main cause of CALIPER REPAIR KITS MERITOR PARTS fatigue cracks is stress concentration caused by surface microscopic peaks and valleys. Therefore, the rougher the surface of the part and the deeper the groove, the more severe the stress concentration will be. Therefore, the surface roughness has a great influence on the fatigue strength of the part.
④ Affects corrosion resistance
The microscopic valleys of the rough surface are prone to accumulation of corrosive substances. For a long time, these corrosive substances will penetrate into the inner layer of the metal, and the metal surface will corrode, thus seriously affecting the corrosion resistance of the workpiece.
Surface roughness is one of the important criteria to measure the accuracy and quality of workpieces and products. Surface roughness refers to the microscopic geometrical errors created by small spacings and peaks and valleys on the machined surface. Surface roughness is very different from shape error. Moreover, the machining roughness will also have a certain influence on the performance of automobile parts.