MEASURING METHOD OF WORKPIECE SURFACE HARDENED LAYER DEPTH

摘要

PROBLEM TO BE SOLVED: To provide a technology capable of measuring continuously or intermittently in the noncontact state, a surface hardened depth on a local part of a workpiece subjected to surface hardening processing, and reducing man-hours.;SOLUTION: A detection coil 28 is supported by a detection coil support 24 through a resin body 36 such as nylon having a triangular cross section and having excellent insulating property. Since the resin body 36 has the triangular cross section, the detection coil 28 can be brought close to the surface of a workpiece 15. Namely, a local part of the workpiece 15 can be measured. The local part of the workpiece is excited by an excitation coil, and an eddy current generated in the workpiece is detected by a signal detection part. Since the signal detection part is brought close to the local part of the workpiece, the surface hardened depth on the local part of the workpiece can be measured even if the shape of the workpiece is complicated. In addition, since the workpiece is measured continuously or intermittently by using the eddy current, the man-hours can be reduced.;COPYRIGHT: (C)2010,JPO&INPIT