The impact of the surface quality on the parts

The impact of the surface quality on the parts

The processing surface quality of precision mechanical parts includes the geometric shape characteristics of the processing surface and the change of the processing surface material, When precision parts processing, we need to understand the five stages of precision machinery parts processing and how to improve the efficiency of precision machinery parts processing, We should also know that in fact, precision mechanical parts processing surface actually has different degrees of cold hard, crack and other mechanical processing error, Make the surface of mechanical parts difficult to achieve the ideal smooth surface, These will have a great impact on the coordination precision, wear resistance, abrasion resistance and fatigue strength of precision mechanical components, To some extent, it will affect the service life of mechanical equipment.

1. Affect the coordination accuracy of mechanical parts The large surface roughness of precision mechanical parts will reduce the coordination precision between parts to a certain extent. If there is a large residual stress on the machining surface, the stability of the coordination accuracy between parts will be seriously affected.

2. Affect the wear resistance of mechanical parts The surface roughness of precision mechanical parts is large, resulting in the contact surface pressure increases, the convex peaks between the surface bite, squeeze, cut, make the wear of the parts surface intensified. The processing surface of precision mechanical parts is too smooth, the lubricating oil can not be hidden, can not cover the contact surface between the parts, easy to occur molecular bonding, but also easy to aggravate the wear of the surface of the parts.

3. Affect the abrasion resistance of mechanical parts The greater the surface roughness of precision mechanical parts processing, the easier it is to accumulate abrasive substances, and the deeper the valley, the more intense the penetration and corrosion will be.

4. To affect the fatigue strength of the mechanical parts

The greater the surface roughness of precision mechanical parts, the worse the anti-fatigue damage ability. Under the action of alternating load of mechanical parts, the concave part of surface roughness is easy to cause stress concentration and produce fatigue cracks. The smaller the surface roughness of the processing is, the less the defects, the better the fatigue resistance of the mechanical parts, the greater the roughness, the deeper the grain marks on the surface of the mechanical parts, the smaller the radius of the grain bottom, the worse the fatigue resistance.

Precision mechanical parts processing surface quality of precision mechanical parts with precision, wear resistance, abrasion resistance and fatigue strength can cause certain influence, so in precision mechanical parts processing should be as far as possible for mechanical parts surface roughness to the right degree, this can better extend the service life of mechanical equipment and reduce the fault maintenance rate of mechanical equipment.

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