Scroll machining method and machining unit

摘要

A scroll machining method for forming a wall part (21) configured in a scroll shape on a surface of a workpiece (W), which includes a first scroll machining step of machining one of the wall surfaces (22, 23), in which a tool (14) is moved relative to the workpiece from an outside of the workpiece (W) toward a center part (25) along a predetermined path (L1) while turning the rotary table (17) in a first direction (R1); and a second scroll machining step of machining the other of the wall surfaces (22, 23), in which the tool (14) is moved relative to the workpiece from the center part (25) of the workpiece (W) toward the outside by returning along the predetermined path (L1) while turning the rotary table (17) in a second direction (R2) opposite to the first direction (R1).

主权项

1. A scroll machining method for forming a wall part configured on a scroll shape on a surface of a workpiece, in which a tool attached to a spindle is moved relative to the workpiece attached to a rotary table, comprising:
a first scroll machining step of machining one of an outside wall surface and an inside wall surface of the wall part, in which the tool is moved relative to the workpiece from an outside of the workpiece toward a center part along a predetermined path while turning the rotary table in a first direction; a second scroll machining step of machining the other of the outside wall surface and the inside wall surface of the wall part, in which the tool is moved relative to the workpiece from the center part of the workpiece toward the outside by returning along the predetermined path while turning the rotary table in a second direction opposite to the first direction; a measurement step of measuring a thickness of the wall part after the first scroll machining step and the second scroll machining step are finished; and a correction step of correcting a tool radius by an amount of a deviation between a measured value measured in the measurement step and a design value of the thickness of the wall part, for a subsequent first scroll machining step and a subsequent second scroll machining step.