SHAPE MEASURING METHOD AND APPARATUS FOR HOLE

摘要

PROBLEM TO BE SOLVED: To provide a shape measuring method and apparatus for a hole capable of measuring the shapes of various holes. SOLUTION: In the measuring apparatus 10 of the invention, an arm 36 is lowered to insert a measuring ball 30 in a hole 22A of a work 22, and the measuring ball 30 is lowered along the direction of depth of the hole 22A. Back pressure of compressed air is detected in plural portions by an A/E converter 18. The detected values are compared with a reference value of a master by control part 20 and converted to the inside diameter of the hole 22A.