Pressed studs and nuts offer useful replacement for welding
09 September 2010
With Rivtex from Arnold Umformtechnik and Arnold and Shinjo, clinch studs and self piercing nuts are pressed into sheet metal parts to achieve high twisting moments and press-out forces. Rivtex fasteners are extremely resistant to press-out forces and torque, and so develop their own safeguard against failure.
This fastening system is a useful replacement for welding, thus avoiding all the associated environmental hazards. The surface structure around the fastening is protected and there is no welding spatter - so no requirement for additional reworking after application. The risk of corrosion (due to the 90% level of zinc coating in sheet steel welding) is eliminated.
Unlike welding screws and welded nuts, these fasteners can be applied at the same time as the sheet steel is stamped and pressed. Arnold and Shinjo can supply standardised tool and feed technology, which enables several fasteners to be placed in a single stroke. Rivtex fasteners can be processed on the fast-running tool in exactly the same way as in the transfer press or pressing line.
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