Hydraulic radial deformation of a tubular member.

摘要

A method and apparatus for hydraulic deformation of a tubular camshaft 13 to lock cam bodies 133, bearing collars 131 and 132, etc. thereon comprises a die cavity receiving the camshaft components and wherein hydraulic fluid is introduced into each end of the die cavity. A pressure transfer block 14 communicates hydraulic fluid from a cylinder 17 to cylinders 16 driving piston nozzles 15 to urge said nozzles into sealing engagement with the ends of the tubular camshaft; each piston nozzle 15 having a through passage therein for transmission of hydraulic fluid therethrough to the interior of the tubular camshaft. Conveniently the pressure transfer block 14 is mounted on a toolset in a press for providing pressure to the hydraulic cylinder 17 although any convenient source of hydraulic fluid under pressure can be utilised.