Punching method for forming press cut in hollow profile wall of slotted pipe, involves arranging punching position of secondary punching step in peripheral direction against punching position of primary punching step on hollow profile wall

摘要

The punching method (10) involves forming a punch opening (16) in the wall of a hollow profile (14) for a punching position in the punching area (30) in the primary punching step (1a), which is followed by a secondary punching step (1b,1c), in which another punch opening (16',16'') is formed in another punching position. The punching position of the secondary punching step is arranged offset in the peripheral direction against the punching position of the primary punching step on the wall of the hollow profile.