外径尺寸大于100毫米的内螺纹制件,在单个或小批加工过程中,对中径的测量常用单项测量的办法,但要多次拆卸,大大降低劳动生产率,对制造精度也会带来一定影响。我厂计量室与生产工人相结合,根据大内螺纹制件中径公差偏大的特点,用下述方法测量,成效显著。 1.在大内螺纹制件坯子的一端,磨出φA尺寸为整数的加工及测量基准,并保持与端面垂直 External diameter greater than 100 mm in the workpiece, in a single or small batch processing, the measurement of diameter commonly used single measurement approach, but to be removed many times, greatly reducing labor productivity, manufacturing precision will bring Certainly affected. I plant measurement room and the combination of production workers, according to large internal thread diameter tolerance is too large features, the following method of measurement, the effect is remarkable. 1. At one end of a large internal thread blank, grind the φA dimension to an integer for machining and measurement and hold perpendicular to the end face