Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Patent
1997-06-06
1999-05-18
Cuda, Irene
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
29888011, B23P15/00
Patent
active
059039752
ABSTRACT:
Provided in accordance with the present invention, is a preferred embodiment of a method for straightening a warped cylinder head (10). The method initially includes placing the cylinder head in a press (12). Thereafter, the press is operated to apply a first pressure, substantially along the longitudinal axis of the cylinder head. Next, the method includes heating the cylinder head to increase the applied pressure to a second pressure, greater than the first pressure. The method then includes cooling the cylinder head until the applied pressure decreases to a third pressure less than the second pressure. The method thereafter includes operating the press to reduce pressure applied to the cylinder head to a fourth pressure, less than the first pressure. Preferably, the method includes maintaining the cylinder head at approximately the fourth pressure, while allowing the cylinder head to cool to ambient temperature. Once the cylinder head has cooled to ambient temperature, the method includes removing the cylinder head from the press.
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patent: 4545101 (1985-10-01), Hilts
patent: 4838069 (1989-06-01), Walker et al.
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