Development of a Laser-Guided Deep-Hole Measuring System: Measurements of Roundness, Cylindricity and Straightness

Abstract

A measuring system is developed based on the autocollimation principle for evaluating the accuracy of a deep hole. The accuracy of a hole is measured by scanning its wall in a circumferential direction at depth intervals of 10mm using a laser-guided probe. In this study, the accuracy and repeatability of this measuring system are evaluated by measuring the roundness, cylindricity and straightness of holes. As a result, it is clarified that the accuracy of the roundness, straightness, cylindricity measured by the measuring system corresponds well to that of the tester in terms of both shape and value and that the standard deviation of 10 measuring measurements of roundness is 0.19μm.