| 摘要 |
<p>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.</p> |
