Collar pulling
Collar pulling is a forming process in which collars are placed on sheet metal or pipes through tensile pressure. According to DIN 8580 , collar drawing is part of the tensile compression forming process.
When pulling collars, the part geometry that can be produced is limited by the process-dependent formability of the material. An extension of the process limits can be achieved by a complex, multi-stage forming process.
Collars are used for many different purposes. They serve, for example, as a thread passage for screw connections , the passage of cables , for fixation or as step protection (perforated sheet), as bearings for shafts in the sheet, to increase the bending stiffness of the sheet.
Web links
- Sheet metal pulling - collar pulling . VDI
- Alternatively, collar pulling guideline . VDI
- Collar pulling: application examples (PDF file) Pforzheim University