Patent ID: 6266858
Filing Date: 2001-07-31
Classification: B21C,B21D,F28F,Y10T

Abstract:
An apparatus for manufacturing a header pipe, the apparatus working a pair of semidivided cylindrical portions respectively arranged on both sides of a connecting portion and opposed to each other at a given angle interval to thereby manufacture a cylindrically-shaped header pipe, said apparatus comprising:a lifter for supporting said connecting portion;energizing means for energizing said lifter toward said connecting portion;a pair of punches respectively disposed rotatably on both sides of said lifter and respectively including semicircular-shaped butting recessed portions for fitting with outer peripheries of said pair of semidivided cylindrical portions; andpressing means for (1) moving said pair of punches toward each other and toward said pair of semidivided cylindrical portions and (2) rotating said pair of punches so as to reduce the given angle interval thereby butting said pair of semidivided cylindrical portions with each other.