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1.吉林省工具锻造厂王君莲问:内径百分表测杆的稳定性如何检定?要求如何? 答:按规程规定,内径百分表测杆的稳定性不单独进行检定,而是用环规进行综合性检定其示值变动性(即示值变化)的大小。百分表示值变动性的检定,应在台架上进行。当百分表的示值分别处于工作行程的始、中、终点三个位置上时,以较慢和较快的速度各移动测杆五次,每五次中的最大与最小值的差值,即为示值变动性,该值应不超过规程规定的要求。 2.镇江脱粒机厂计量室问:(1)游标卡尺上量爪刃口不平行时,对平行性应如何要求?(2)检定外径千分尺测量面的表面粗糙度
1. Jilin Province Tool forging plant Wangjun Lin Q: How to test the stability of the inner diameter dial indicator rod? What is the requirement? A: According to regulations, the stability of the inner diameter dial indicator rod test is not alone, but with ring gauge Conduct a comprehensive verification of the value of its variability (ie changes in indication) size. The percent change in the value of the verification, should be carried out on the bench. When the indication of the dial indicator is respectively at the beginning, end and end of the working stroke, the difference between the maximum value and the minimum value of five times each moving the measuring rod at a slower and faster speed and every five times , That is, the value of the variability, the value should not exceed the requirements of the rules. 2. Zhenjiang threshing machine factory measurement room Q: (1) caliper caliper cutting edge is not parallel, the parallelism should be how to request? (2) test the outer diameter of the micrometer surface roughness measurement