The quality of the machined surface of precision mechanical parts includes the geometrical characteristics of the machined surface and the change of the material of the machined surface. When machining precision parts, we need to understand the 5 stages of machining of precision machined parts and how to improve the efficiency of machining of precision machined parts. , we should also know that the machining surface of precision mechanical parts actually has different degrees of chilling, cracks and other machining errors, which make it difficult for the surface of mechanical parts to achieve an ideal smooth surface, which will affect the matching accuracy and resistance of precision mechanical parts. Abrasion, abrasion resistance and fatigue strength have a great impact, which will affect the service life of mechanical equipment to a certain extent.

1. Affect the matching accuracy of mechanical parts

The large surface roughness of precision mechanical parts will reduce the matching accuracy between parts to a certain extent. If there is a large residual stress on the machined surface, it will seriously affect the stability of the matching accuracy between parts.

2. Affect the wear resistance of mechanical parts

The surface roughness of precision mechanical parts is large, which causes the contact surface pressure to increase, and the convex peaks between the surfaces bite, crack, and cut off each other, which aggravates the wear of the surface of the parts. The machining surface of precision mechanical parts is too smooth, the lubricating oil cannot be hidden, and it cannot cover the contact surface between the parts, which is prone to molecular bonding and aggravates the wear of the surface of the parts.

3. Affect the wear resistance of mechanical parts

The greater the surface roughness of precision mechanical parts, the easier it is to accumulate abrasive substances, and the deeper the valleys, the more intense the penetration and corrosion.

4. Affect the fatigue strength of mechanical parts

The greater the surface roughness of precision mechanical parts, the worse the resistance to fatigue damage. Under the action of alternating loads, the valleys of the surface roughness of the mechanical parts are likely to cause stress concentration and fatigue cracks. The smaller the roughness of the machined surface, the fewer the defects, and the better the fatigue resistance of the mechanical parts. Difference.

The surface quality of precision mechanical parts will have a certain impact on the matching accuracy, wear resistance, wear resistance and fatigue strength of mechanical parts. Therefore, when processing precision mechanical parts, the surface of mechanical parts should be as good as possible. The roughness reaches an appropriate level, which can better extend the service life of mechanical equipment and reduce the failure maintenance rate of mechanical equipment.