Machining parts size inspection standards as bellow:

1, the basic principle: This method of acceptance only accepts the work in accordance with the provisions of the size of acceptance, with the requirements of the workpiece, dimensional inspection needs to comply with Taylor’s principle, the role of the hole or shaft size does not allow more than the actual size.

2, the minimum deformation principle: In order to ensure the reliability and accuracy of the measurement results, we should try to avoid the impact of various factors, so that deformation programming minimum.

3, the principle of the shortest size chain: In order to ensure a certain degree of measurement accuracy, the measurement chain should be as short as possible.

4, the principle of closure: When the measurement, if you can meet the closure conditions, which the sum of the deviation of the interval is zero, this is the so-called closed principle.

5, basically agree with the principle: the vehicle benchmark should be consistent with the design basis, process baseline.

By Nicole.