METALLIC BELLOWS FORMING METHOD FOR WORKING BULGE AND METALLIC BELLOWS FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To efficiently obtain plural numbers of bellows tubes. ;SOLUTION: Plural half split holes 11b, 12b to be a series of split holes 13 for forming a bellows part at the time of mutual joining are opened at a prescribed interval on respective joining edge sides 11a, 12a of a die main body 10 consisting of a pair of split dies 11, 12 wherein half split holes 11b, 12b holding the outer periphery of a tube stock are opened so as to form the bellows part on the outer periphery of the tube stock. When the bellows part is formed with the die main body 10, plural numbers of tube stocks are formed as the tube body having the bellows part at a time.;COPYRIGHT: (C)1999,JPO