Nondestructive inspection method for spot-welded joints

Details Nondestructive inspection method for spot-welded joints Nondestructive inspection method for spot-welded joints

1976-11-10

1978-04-11

Goldstein, Herbert

Measuring and testing

Gas content of a liquid or a solid

By vibration

G01N 2572

Patent

active

040832236

ABSTRACT:
The quality of joints formed by spot welding, particularly the diameters of the individual nuggets, can accurately and nondestructively be inspected by heating or cooling one of the welded members and measuring the distribution of the surface temperature of the other member because of a maximal heat conduction at each nugget. The surface temperature distribution may be measured merely linearly since the width of a peak on the temperature-distance curve depends on the diameter of a nugget.

REFERENCES:
patent: 3206603 (1965-09-01), Mauro
patent: 3406272 (1968-10-01), Ehrlich
patent: 3427861 (1969-02-01), Maley
patent: 3434332 (1969-03-01), Maley
patent: 3566669 (1971-03-01), Lawrence et al.
patent: 3599474 (1977-08-01), Brown et al.
Katzoff, "The Surface-Tension Method of Visually Inspecting Honeycomb-Core Sandwich Plate" in Non Destructive 4/60 pp. 114-118.
Malim, "Infrared Scans for Inner Defects" in Iron Age Reprint, 5/65.

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