In recent years, as the needs for parts manufacturing from various fields have diversified, machine parts have become more complex in shape, and their manufacturing has shifted to variable-type variable-volume production. As a result, various jigs are required for the machining of three-dimensional parts. However, manufacturing dedicated jigs for small-volume production is a challenge that increases costs. On the other hand, when using universal jigs, it is difficult to have reference surfaces due to the complex shapes, leading to unavoidable clamping errors. This study aims to develop a method to reduce processing errors without re-clamping the workpiece by measuring mounting errors on the machine and modifying the tool path of the processing machine to compensate for these errors, thereby enabling the processing of various parts without customized jigs. Specifically, the study identifies mounting errors using a 3D scanner on the machine tool while the workpiece is in a state with mounting errors, and then modifies the NC program accordingly.
Narita et al. (Wed,) studied this question.