PURPOSE: To enable a result of work to be decided for whether it is good or bad with no necessity of skill, by irradiating light from a gloss sensor to a surface, immediately after it is processed by peening work, and comparing a quantity of reflected light with the quantity of reflected light from a standard workpiece so as to decide whether the result of work is good or bad.
CONSTITUTION: If short peening work is finished for a workpiece 22, it is carried outside a blast chamber 8 by a grip 23 of a workpiece attitude control device 7 and positioned to a gloss sensor 6 immediately after a time for which gloss of the workpiece is not changed. This gloss sensor 6, placing the workpiece 22 approaching to an optical fiber 27 in a distance l about 3cm, measures the gloss of a processed surface by a light emitting and a light receiving element 29, 30. And a quantity of reflecting light from a standard workpiece, set by previously studying a condition of compressed air pressure, machining time, etc. obtaining a predetermined peening effect, serves as a reference deciding a result of peening work for whether it is good or bed.
FUJISHIMA SUSUMU
TAKAHASHI TOSHIYUKI
KAWADA YOICHI
