Patent ID: 7807943
Filing Date: 2010-10-05
Classification: B23K,B23P,B26F,B28B

Abstract:
1. A method of producing a molding die using a workpiece, for use in producing honeycomb structure bodies, in each of which a plurality of slit grooves and a plurality of feed holes communicating with the feed holes are formed in a lattice arrangement and a raw material of the honeycomb structure body is fed through the feed holes and molded in order to produce the honeycomb structure body having a honeycomb structure shape, the method comprising steps of: determining a reference position as a relative position between a pillar of a high-pressure water jet to be supplied to the workpiece and a reference hole, which is penetratingly formed in the workpiece, through which the outer periphery of the pillar of a high-pressure water jet passes without contacting the inner wall of the reference hole, aligning a slit groove formation position with a pillar formation position on a slit groove formation surface of the workpiece by relatively shifting the pillar of a high-pressure water jet to the workpiece based on data of a coordinates using the reference position as the origin of the coordinates; and forming the slit grooves in the workpiece by supplying the pillar of a high-pressure water jet onto the slit groove formation position on a slit groove formation surface of the workpiece while irradiating and scanning a laser beam into the pillar of a high-pressure water jet many times along the slit groove formation position, wherein the reference hole is formed in a reference hole formation member other than the workpiece, and the reference hole formation member is assembled into the workpiece.