Abstract: The automobile components are numerous, the processes are lengthy, and controlling the dimensions during the production process is difficult. There is no direct means to obtain vehicle dimension data for vehicles coming off the assembly line. Based on the characteristics of double-arm three-coordinate measurement, with the goal of minimum cost and universal applicability, and without affecting or damaging the vehicles or the premises, a lifting system is introduced. The existing measurement platform is upgraded and modified to cover the measurement of existing massproduced vehicle models in the company. In order to ensure the consistency and accuracy of the vehicle measurement data, the coordinate system is established by selecting the same positioning reference for the vehicle body fixtures and gauges, in coordination with the vehicle assembly process and standards, to directly obtain the dimensions of vehicle parts. After experimental verification, this method has low investment costs, high universality, accurate data, and is suitable for application in the measurement of complete vehicle products by automotive companies to determine the status of vehicle body product dimensions.

Key words: three-coordinate measurement; lifting system; coordinate system; overall vehicle dimensions

摘要： 汽车组件多、工序长，在生产过程中尺寸难以控制，针对总装下线的车辆没有直接获 取车辆尺寸数据的手段，根据双悬臂三坐标测量特点，以最小成本，普适性测量为目标，在 不影响不破坏车辆及场地的情况下，加入举升系统，升级改造现有测量平台，覆盖到公司现 有量产车型测量，为保证整车测量数据的一致性与准确性，坐标系建立选取车身夹具与检具 统一用的定位基准，配合整车装配工艺及标准，直接获取车辆零件尺寸。经实验验证，该方 法投资成本较低，普适性较高，数据准确，适合应用于车企整车产品测量，判断车身产品尺 寸状态。

关键词: 三坐标测量；举升系统；坐标系；整车尺寸