Controlled-pressure diffusion bonding and fixture therefor

Details Controlled-pressure diffusion bonding and fixture therefor Controlled-pressure diffusion bonding and fixture therefor

1977-06-28

1978-05-16

Kelly, Donald G.

Metal fusion bonding

Process

Diffusion type

291568H, 228 441R, 228212, 228243, B23K 1900

Patent

active

040894568

ABSTRACT:
An improved diffusion bonding fixture for holding workpiece surfaces in opposed contacting relation and exerting controlled pressure across the surfaces is disclosed. The fixture includes components having different thermal expansion characteristics which hold the workpiece surfaces together and generate pressure on the surfaces upon heating to the bonding temperature. The fixture also includes one or more pressure-controlling shim members disposed between the components of the fixture, the shim members being selectively and controllably deformed by the expanding components to control said bonding pressure at the desired value and to prevent unwanted distortion of the workpiece surfaces and fixture components. The fixture is especially useful in bonding workpiece surfaces of highly complex configurations, such as those associated with gas turbine blades, vanes and the like.

REFERENCES:
patent: 2464574 (1949-03-01), Hengstler
patent: 2979808 (1961-04-01), Booth
patent: 3762032 (1973-10-01), Bowling et al.
patent: 4042162 (1977-08-01), Meginnis et al.

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