Weld bead cutting device and weld bead cutting method

A weld bead cutting device configured to cut a weld bead generated on an outer circumference of a welding portion when annular end edges of two resin members on open sides of the two resin members are butted and welded to each other, the weld bead cutting device configured to cut the weld bead by rotating a workpiece, formed by at least the two resin members welded to each other, about a central axis extending in a direction along a butting direction of the two resin members, and by moving a cutting tool at a predetermined feed pitch along a bead width direction being the direction along the butting direction per rotation of the workpiece, the weld bead cutting device comprising:

• a bead end edge position measuring device configured to measure a position of at least one of both end edges of the weld bead in the bead width direction over an entire circumference of the workpiece in a circumferential direction of the workpiece;
• a bead profile information creation part configured to, based on information on the position of the end edge of the weld bead in the bead width direction over the entire circumference of the workpiece in the circumferential direction measured by the bead end edge position measuring device, create bead profile information being information on a shape of the end edge of the weld bead over the entire circumference of the workpiece in the circumferential direction;
• a machining information creation part configured to, based on the bead profile information created by the bead profile information creation part, create machining information of the workpiece per rotation of the workpiece being position information of the cutting tool in the bead width direction per phase in the circumferential direction of the workpiece so that a moving locus of the cutting tool relative to the workpiece along the circumferential direction of the workpiece approximates the shape of the end edge of the weld bead over the entire circumference of the workpiece in the circumferential direction per rotation of the workpiece rotating about the central axis;
• and
• a cutting tool feed control part configured to, according to the machining information created by the machining information creation part, control a position of the cutting tool in the bead width direction per rotation of the workpiece rotating about the central axis.