Abstract: Based on the cettol6σ tolerance simulation technology, the simulation analysis of the appearance difference between the two ends of the air deflector of a new household wall-mounted air conditioner is carried out. Based on the air-conditioning solid model, the assembly constraints are based on the actual structural design scheme, and the dimensional tolerance definition is based on the part processing principle. The cettol6σ software is based on the principle of random sampling assembly for analysis and calculation. Through the contribution and sensitivity ranking table, the key influencing factors are refined, and the rectification and optimization scheme is formulated and verified based on this, and finally the problem of the matching surface aberration at both ends of the air deflector of the new product is solved.

Key words: Tolerance simulation analysis, Statistical method, Extreme value method, Contribution degree, Sensitivity, Surface difference, Random sampling