Tolerance Parallel Optimization Designs Based on the Simulation Annealing Method;

Analysis of Similarities and Differences between American Standard and Chinese Standard of Shape and Position Tolerance;

Fuzzy robust optimization design of discrete tolerance based on improved genetic algorithm;

It is discussed that the determination of radial internal size and axial internal size as well as their tolerances of sample axis in light of practical examples.

Then its performance and application are further described by combining an expert system for tolerances and fits of antifriction bearing.

An emphasis of the discussion is put on various errors of the system and the method of evaluation and reduction.

The paper discussed the technical questions about the center-line positioning surveying of dragging spool, resolved the difficulties how to control the parallelism error within 2 mm and the Height error under 1 mm.

Based on Huygens-Fresnel integral caculation and Lommal function, the paper centeres on how to caculate the approximate value of the common difference between focuses, through analysing the distribution of three-dimensional light near focus.