Betätigungseinrichtung zum Bilden eines Bordrandes an einem Radkasten

摘要

An actuator for forming a flange on a wheelhousing 10 includes wall surfaces 160, 166 defining at least first and second separate, elongated, coaxial fluid chambers 136, 138. The first and second chambers have coaxial apertures extending therethrough. An elongated rod 174 extends through the coaxial apertures and has first and second pistons 146, 148 connected thereto for reciprocating respectively in the first and second chambers in response to fluid delivered and thereto. As shown, piston rods 144 and 174 respectively operate a clamping member 24 for the wheelhouse and a bending tool 16. Each piston rod is drawn by four pistons in tandem, each piston reciprocating in a chamber formed by a sleeve 160, 162 inserted in a housing bore. Adjacent sleeves are separated by wall members 168, 185.