基于多层基准体系的公差设计与虚实验证方法研究

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中图分类号：U466 文献标志码：B DOI：10.19710/J.cnki.1003-8817.20240420

Researchon ToleranceDesignandVirtual& Real Verification Method Based on Multi-Level Local Datum System

WangYanwei，WangHaoyang，CuiCui，Shi Chengjie，Chen Yu（FAWBestuneAuto Co.，Ltd.，Changchun，130022）

Abstract： In order to improve thequality of automotiveDTS，a multi-level local datum system tolerance design is establishedon the vehicle body assembly according to therequirements of the whole vehicle DTS goals.By introducing local datumvirtual fixtures in the3Dtolerance analysissoftware3DCS，partsareassembled into differentdatum systems，andthe tolerance correlationrelationship between each leveldatumisestablished，achieving therationality verificationof thedatum tolerance designateachlevelof thevehicle body.Andtheanalysisresultsare incorporated into the design of thevehicle’s Cordinate Measuring Machining（CMM）andchimeric check fixture，aswell as the requirementsfortesting tolerances，toensure therationalizationoftheevaluationof the manufacturing deviationof the vehicle assembly. The vehicle's DTS goals have been achieved through virtual and real verification.

Keywords：DTS，Multi-level localdatum，Tolerancedesign，Virtual&realverification

1前言

乘用车在产品设计、制造、装配以及检测过程中，涉及设计偏差、零件制造偏差、装配过程偏差和质量检测偏差等偏差源[1，会体现在整车外观缝隙上，直接影响用户的主观感知品质。（剩余7118字）