关键词: 白车身；尺寸精度；检具设计制造；检具制造工艺；测量数据采集

Abstract: In the quality control of the automobile manufacturing industry, body in white (BIW) checking fixture plays an important role in the control of automobile dimensional accuracy. This paper discusses the current status of BIW checking fixture manufacturing technology, puts forward some thoughts and suggestions on the design and manufacture of BIW checking fixture, to improve, detection efficiency and accuracy. BIW checking fixture design and manufacturing strategy is proposed, according to the sub assembly route and assembly requirements of sub-assemblies, to simplify checking fixture structure, reduce checking fixture manufacturing cost, and improve detection efficiency and effectiveness. The manufacturer of checking fixture should understand the actual application of checking fixture/gage in the factory, and consider the humanmachine engineering to improve the inspection efficiency. The manufacturing process of the checking fixture is considered for practical application, so as to improve the understanding of material characteristics, reasonably design the structure of the the checking fixture, and avoid the accuracy bias of the checking fixture due to the influence of material, structure, environment and other factors. Through the optimization of the design scheme of the checking fixture, the convenience and accuracy of the measurement data collection are improved, and the measurement reading error is reduced.

Key words: BIW; Dimensional accuracy; Checking fixture design and manufacture; Checking fixture manufacturing process; Measured data collection