Patent ID: 8146251
Filing Date: 2012-04-03
Classification: B23P,F01N,Y10T

Abstract:
1. A method of manufacturing a catalytic converter a catalyst whose outer peripheral surface is wrapped with a mat, and an outer cylindrical housing which includes at least a reduced-diameter portion to support therein the catalyst and the mat, the method comprising the steps of: providing a pressing device, and thereby press-fitting the catalyst and the mat into the outer cylindrical housing along a longitudinal direction of the outer cylindrical housing; a detecting step of detecting a longitudinal pressing force at a time when at least a portion of the catalyst is within an enlarged-diameter portion of the outer cylindrical housing while the pressing device is pressing the catalyst and the mat in the longitudinal direction into the outer cylindrical housing; a determining step of determining a diameter reduction of the outer cylindrical housing, by which a clearance value between the outer cylindrical housing and the catalyst is set to a desired target value, as a function of the longitudinal pressing force detected by the detecting step; and a swaging step of reducing a diameter of the outer cylindrical housing based on the diameter reduction calculated by the determining step.