JPS55130389A - Size control method in diffusion welding - Google Patents

Abstract

PURPOSE: To evenly size-control the entire part of the welding works by electrically detecting the contact of the plural limit plates which prevent more than specified deformations of the welding works and intermediate members and releasing the pressing after the welding works contact the entire limit plates.

CONSTITUTION: A clearance A which becomes the size reduction amount of the welding works 4 owing to diffusion welding is provided between an upper intermediate member 3 composed of the conductor having high-temperature high- strength and limit plates 5-1 and 5-2 composed of conductor material, respectively. When in this state the deformations of the welding works 4 progress unevenly during diffusion welding and, e.g., the plate 5-1 makes close contact with the member 3, then the welding work deformation amount detecting circuit between the both becomes closed circuit and a resistance meter 9-1 becomes 0Ω. Next, when the diffusion welding is further progressed from this state, the deformation on the plate 5-1 side of the welding works 4 is perfectly blocked by the plate 5-1 and the welding works 4 deform only on the plate 5-2 side. And finally, the plate 5-2 makes close contact with the member 3 as well and a resistance meter 9-2 indicates 0Ω, too, thus the welding works 4 may be evenly size-controlled.

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