| 摘要 |
A rack ( 20 ) for a rack and pinion steering system ( 10 ) includes a fully dense powder metal rack tooth section ( 50 ) joined, by sintering, to a hollow rack tube ( 30 ). The rack tooth section ( 50 ) is formed by pressing powder metal ( 70 ) into a die assembly ( 60 ) having internal rack tooth forms ( 68 ). The rack tube ( 30 ) and the pressed powder metal ( 70 ) are sintered to complete formation of the rack ( 20 ). |
