1.Processing error:
the actual size of the parts and theoretically the absolute accuracy of the difference between the known as the processing error.
The machining errors are classified as follows:
1. Dimension error 2. Shape error 3. Position error 4. Surface roughness error 5. Corrugation error
2.Tolerance:
Tolerance refers to the range of dimensions, geometries, geometric positional relationships, and surface roughness values of parts. Tolerances are used to limit the error.
Tolerances are mainly divided into the following:
1. Dimensional Tolerance 2. Shape Tolerance 3. Position Tolerance 4. Surface Roughness Tolerance
3. Standardization:
standardization refers to the development of standards and the implementation of technical standards as the main content of the entire process of activities.