The challenge was the forming of unusual geometries in the area of fine mechanics riveting the rivet head material plane.
A brass gear wheel is to be axially connected to a shaft. The protruding material to be formed is to be shaped into the program on the gear wheel and protrude only minimally from the plane surface, thus fixing the gear wheel on the shaft. The shaft was prepared with an axial undercut. The material to be formed should be formed flat to the outside.
Using a hollow form tool, the material in the undercut is pressed down flat into the transmission on the gear wheel and formed flat. This fixes the gear wheel to the shaft. The remaining material has a minimum protrusion of <0.05mm. Due to the precise component pick-up and rivet start detection, the material can be formed exactly to the desired height.
Facts & Figures
|Riveting Process||Radial riveting|
|Geometrie||Ø: OD4 mm / rivet protrusion 0.4 mm|
|Rivet head geometry||Folded plane outward|
|Performance Data||Cycle time: approx.1.5 sec,|
|Devices||Force reduced riveting machine RN181R|
|Process Control||Process control HPP-25|
|Area of Application||Fine mechanics|
|User Benefits: Process||Reduced effort and time for setup/changeover, reliable process, reduction of NOK rate|
|User Benefits: Economic||Simplified joining process, alternative to cumbersome joining solutions of different materials|