基于多層基準(zhǔn)體系的公差設(shè)計(jì)與虛實(shí)驗(yàn)證方法研究

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中圖分類號(hào)：U466 文獻(xiàn)標(biāo)志碼：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

乘用車在產(chǎn)品設(shè)計(jì)、制造、裝配以及檢測(cè)過(guò)程中，涉及設(shè)計(jì)偏差、零件制造偏差、裝配過(guò)程偏差和質(zhì)量檢測(cè)偏差等偏差源[1，會(huì)體現(xiàn)在整車外觀縫隙上，直接影響用戶的主觀感知品質(zhì)。（剩余7118字）