The neck it was attached to the cylindrical hollow body, the neck it was attached to the destal of one side of the boiler barrel which consists of the cylindrical hollow body which

摘要

Propose a kind of cylindrical hollow body (1) for forming neck and flange end, such as tank body, these both ends opens, described device have external forming tool (4) that is longitudinally fixed there are two the radially fixed interior tool (2,3) of longitudinally moveable prefabricated house and a longitudinally fixed and radially fixed interior tool (2,3) and one and moving radially. When neck and flange, outer tool (4) executes radial feed movement towards interior tool (2,3), curve section promotes interior tool (2,3) between the two simultaneously, these shapes are in neck and flange, so two in-house tools (2,3) has been pushed to separate. The interior tool of balancing point (2A, 3A) two (2,3) is overlapped. Two in-house tools (2,3) have the same diameter, which is only slightly less than the hollow cylindrical body (1) of the bore.