Machining jig and machining method

Abstract

A machining jig holds a workpiece with respect to a tool that partially removes an outer peripheral surface of the workpiece. The machining jig includes a first jig including an inner peripheral surface having a shape similar to a contour of the workpiece and an outer peripheral surface including a first inclined section inclined with respect to an axial direction of the workpiece; a second jig including an inner peripheral surface including a second inclined section configured to be fitted to the first inclined section; a base to which the second jig is coaxially fixed; and a sliding mechanism that enables a large-diameter portion of the first inclined section and a small-diameter portion of the second inclined section to move toward and away from each other. The sliding mechanism of the machining jig causes the small-diameter portion of the second inclined section to press the large-diameter portion of the first inclined section so that compressive stress is applied to the outer peripheral surface of the workpiece at a position near a portion to be removed by the tool.