Metal fusion bonding – Process – With shaping
Patent
1988-08-04
1989-08-22
Godici, Nicholas P.
Metal fusion bonding
Process
With shaping
228155, 228179, 228187, 22826311, 22826315, 7386236, 73DIG2, G01L 310, B23K 112, B23K 120, B23K 3102
Patent
active
048588180
ABSTRACT:
A method is provided for use with non-contacting torque sensors. Many torque sensors use a sheet of magnetostrictive material wrapped about the shaft whose torque is to be measured. The methods used to wrap and affix the sheet of magnetostrictive material induce a prestress into the sheet, which leads to early saturation of the magnetostrictive material. The prestress diminishes the useful range of the torque sensor. As a solution, a method is provided for bonding a magnetostrictive material sheet to a shaft while minimizing stress of the magnetostrictive sheet. By bending a magnetostrictive material sheet and a carrier sheet about the mandrel and bonding the sheets together at a first preselected temperature, cooling them to form a cylinder having a magnetostrictive material outer layer and a carrier inner layer, and bonding the cylinder to a shaft at a second predetermined temperature, the stresses induced in the magnetostrictive sheet are minimized.
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Knox Lawrence D.
Tsals Izrail
Caterpillar Inc.
Fletcher Michael G.
Godici Nicholas P.
Heinrich Samuel M.
Jeang Wei Wei
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