METHOD FOR MANUFACTURING A SEMI-SEAMLESS TUBE WITH THE SAME MECHANICAL PROPERTIES AS A NORMAL SEAMLESS TUBE

摘要

PURPOSE: A method for manufacturing a semi-seamless tube is provided to simplify the manufacturing processes by welding the butted edges of a tube-shaped metal strip to produce a seamed tube first and inserting a plug into the seamed tube to be drawn into a semi-seamless tube.;CONSTITUTION: A method for manufacturing a semi-seamless tube comprises the steps of: transferring metal strip to be shaped into a tube(S101), forming the metal strip into a tube shape using a pair of forming rollers(S102), welding the butted edges of the tube to obtain a seamed tube(S103), inserting a plug in the seamed tube and drawing the seamed tube into a semi-seamless tube through dies(S104), removing grease from the semi-seamless tube(S105), and heat-treating the semi-seamless tube(S106).;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Start; (BB) End; (S101) Transferring metal strip; (S102) Molding into tube shape; (S103) Welding joint; (S104) Inserting plug and drawing with dies; (S105) Removing grease; (S106) Heat treatment; (S107) Performance test