公开(公告)号：US09719404B2

公开(公告)日：2017-08-01

申请号：US14782852

申请日：2014-04-09

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Akiyoshi Yamamoto ,  Kenji Shikata ,  Ken Miwa ,  Koichi Hiramatsu ,  Isao Nojiri ,  Tomoyuki Fujita ,  Kazuki Sugi

IPC: F01N13/08 ,  B23P11/00 ,  B21D39/00 ,  B23P17/00 ,  B21D51/16 ,  F01N13/18 ,  F01N1/00 ,  B21D51/28

CPC classification number: F01N13/1872 ,  F01N1/00 ,  F01N13/18 ,  F01N2450/20 ,  F01N2470/06 ,  F01N2470/10 ,  F01N2490/16

Abstract: A manufacturing method for a muffler includes: a trimming step, of cutting out a dogleg shaped muffler body member; a bending processing step of processing the muffler body member into a tube by advancing the muffler body member between an upper roller and a lower roller of a bending machine while adjusting an advancing direction with a guide and by changing a relative position of the upper roller and the lower roller; a first joining step of joining two ends of the tubularly-processed muffler body member in a long side direction; an insertion step of inserting an inner structural member into the inside of the tubularly-processed muffler body member; a second joining step of joining caps to opening portions of the tubularly-processed muffler body member; and a third joining step of joining an air intake joint and an exhaust pipe to the sealed muffler body member.