Manufacture of long small diameter steel frame

Abstract

Abstract PURPOSE:To prevent bending to be generated in a frame easily by cutting a steel plate to a specified length, making it into cylindrical form and after joining facing parts in axial direction by welding, heating the symmetric part of welded part at a specified temperature. CONSTITUTION:A steel plate of specified thickness is cut to a specified length and length and formed at cylindrical form to obtain a frame 1. Facing part 2 in axial direction of the steel plate formed to a cylinder is welded extending an entire length to form a weld zone 3. Then, symmetric part 4 of the weld zone 3 is heated at a specified temperature to correct bending caused by contraction strain deriving from the welding. By this way, bending of the frame 1 can be prevented by simple work and long with a small diameter steel frame 1 can be manufactured at low cost.

Inventors

• 👤 Tetsuhiro Mitsuzawa
• 👤 光沢　哲弘
• 👤 Hiroshi Inao
• 👤 稲尾　博

Bibliographic Details