METHOD OF DETECTING MARKING AND REMOVING SURFACE CRACKS FROM THE SURFACE OF A METAL WORKPIECE

摘要

Method and apparatus for marking surface cracks in steel workpieces prior to grinding for eliminating the cracks, in which the cracks are completely filled with ink supplied by a spray gun, excess ink being removed with a scraper. The ink, which may be fluorescent, makes it relatively easy for a grinding machine operator to observe a crack, as compared to present methods.