Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1988-06-24
1989-06-06
Hall, Carl E.
Metal working
Method of mechanical manufacture
Assembling or joining
29445, 29467, 295221, 74567, B21D 3914
Patent
active
048358320
ABSTRACT:
Camshaft assemblies, methods and apparatus are provided for making camshafts by the expansion of tubular shafts into prelocated cams, journals and other elements, if desired. Features of the camshafts include trilobe or polylobe element openings, preferably splined or serrated for low energy filling and high torque capacity and High Strength Low Alloy mild steel tubular shaft material. The method emphasizes trapping, or loading, the shaft of prevent axial lengthening during expansion such as by mechanical ballizing. The apparatus includes adjustable thrust blocks and locating plungers with incorporated flush pin gages together with hydraulic or other loading means all for use in carrying out the assembly method with various benefits from the incorporated features.
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Arnold Philip D.
Kaywood Roy G.
General Motors Corporation
Hall Carl E.
Outland Robert J.
Rawlins Andrew E.
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