A large-scale profile measuring instrument is developed for measuring smface profile and roughness of precision parts with inner diameter of more than 300 mm.The measuring principle and structural design are analyzed in detail,which effectively solves precision measurement problems of relevant dimension of large-scale bearing products during processing and final inspection of bearing ring raceway.%开发了一种针对内径300 mm以上精密零件表面轮廓和粗糙度测量的大型轮廓测量仪,分析其测量原理和结构设计,有效地解决了大型轴承产品在轴承套圈滚道加工及终检过程中相关尺寸精密测量的问题.
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