TOOL FOR MAKING JOINTS OF CLINCH TYPE

摘要

A tool making joints of clinch type between two or several sheet formed members, which tool comprises two separate tool parts, a first tool-part with a punch and a second tool-part provided with a die which co-operate for producing said joint. The punch is arranged to be driven in a linear movement in the direction of the co-axial die provided with a die cavity at the bottom of which an anvil (3) is arranged. A spring element (5) having the general form of a cylindrical cage has a surface which has been provided with a number of slots to form a corresponding number of long elastic arms (11) partitioned around the circumference of the cage with their free ends at the upper edge of the cage. Said free end of each arm (11) is provided with a bent flange (12) arranged to bear laterally against a corresponding movable element (4) to transfer the spring force to said element, and said bent flange (12) is additionally arranged to grip around a heel portion (13) of the corresponding movable element (4) in order to block the die element for axial movement relative to the cage being fixed to the die body.