MUFFLER AND ITS CORRESPONDING MANUFACTURING METHOD

摘要

A manufacturing method for a muffler includes: a trimming step (S1), of cutting out a dogleg shaped muffler body member; a bending processing step (S2) 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 (S3) of joining two ends of the tubularly-processed muffler body member in a long side direction; an insertion step (S4) of inserting an inner structural member into the inside of the tubularly-processed muffler body member; a second joining step (S5) of joining caps to opening portions of the tubularly-processed muffler body member; and a third joining step (S6) of joining an air intake joint and an exhaust pipe to the sealed muffler body member.