SIMULTANEOUS MANUFACTURING METHOD FOR EXPANDING AND CONTRACTING COUPLING PIPE OF AUTOMOBILE SILENCER

摘要

The present invention relates to a simultaneous manufacturing method for expanding and contracting a coupling pipe of an automobile silencer and, more specifically, relates to a simultaneous manufacturing method for expanding and contracting a coupling pipe of an automobile silencer, wherein when manufacturing a coupling pipe used for an automobile silencer, without additional pipe expanding and contracting processes, one manufacturing process step is performed at a time. Moreover, the process is performed with multiple stage processes to perform work with higher elongation and increase manufacturing accuracy at the same time.;COPYRIGHT KIPO 2019