The meaning of the gauge block and the use level
阅读量：913 Release time: 2018-07-27 Reading volume: 913
Gage block (block gauge) ⑴ Shape: rectangular, round ⑵ Material: steel, quartz, agate ⑶ Measuring surface: 1 pair of smooth planes parallel to each other ⑷ Parameters: ① Center length L: The center point of a measuring surface of the measuring block a to The vertical distance between the auxiliary plane and the other measuring surface of the gauge block ② Length variation: the difference between the maximum and minimum lengths of any point length L i of the gauge block ③ Nominal size: the dimension marked on the gauge block ⑸ The grade of the gauge block: grade: 00, 0, 1, 2, 3 in order; decrease according to the length limit deviation and length variation; take the nominal length as the working size. Etc .: 1, 2, 3, 4, 5, and 6 decrease in sequence; the limit deviation and plane parallelism points measured according to the center length; the actual size of the center length after verification is used as the working size. ① Use according to the grade: the manufacturing error of the gauge block is eliminated, and only the measurement error is used. ② Use according to the level: it includes the manufacturing error and the measurement error of the gauge block.