Metal working – Method of mechanical manufacture – With testing or indicating
Patent
1979-12-10
1982-08-17
Combs, Ervin M.
Metal working
Method of mechanical manufacture
With testing or indicating
29240, 73761, 173 12, B23P 1906
Patent
active
043442161
ABSTRACT:
Apparatus and method for tightening assemblies held together by threaded fasteners. The desired tightened condition is achieved by turning the threaded fastener through a precise tightening angle required to induce a predetermined preload in the threaded fastener and calculated from input parameters characteristic of the assembly being tightened and the predetermined preload. The tightening angle is measured from the onset of linearity of the preload-rotation curve for the assembly by sensing the onset of the substantially linear tightening portion of the torque-rotation curve through which the assembly is taken as it is being tightened.
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patent: 3982419 (1976-09-01), Boys
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patent: 4104779 (1978-08-01), Sigmund
patent: 4104780 (1978-08-01), Sigmund
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patent: 4161221 (1979-07-01), Carlin et al.
patent: 4163310 (1979-08-01), Sigmund
patent: 4179786 (1979-12-01), Eshghy
Combs Ervin M.
Nerenberg Aaron
SPS Technologies, Inc.
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