SPINNING DEVICE, METHOD OD MANUFACTURING TANK MIRROR PORTION, METHOD OF MANUFACTURING TANK BODY PORTION, METHOD OF MANUFACTURING TANK, AND TANK

摘要

PROBLEM TO BE SOLVED: To provide a spinning device capable of preventing a problem in a product shape due to the thermal expansion and the like of rollers, and manufacturing a product with high precision at a low cost.SOLUTION: While rotating a work 301, an inner surface and an outer surface of the work 301 are sandwiched by a molding roller 205 and a mold receiving roller 206 to be molded. A shape of a machined portion of the work 301 is measured by an optical profile measuring apparatus 100. On the basis of a relationship between dimensions of the machined portion of the work 301 and dimensions of a clearance between both rollers 205 and 206, tracks of both rollers 205 and 206 are corrected so as to make the clearance between both rollers 205 and 206 become a value corresponding to a target shape of the machined portion, thereby driving both rollers 205 and 206.