Method and apparatus for measuring displacement of terminal cont

Details Method and apparatus for measuring displacement of terminal cont Method and apparatus for measuring displacement of terminal cont

1998-10-13

2000-07-04

Noori, Max

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

324500, 439109, G01N 320

Patent

active

060822015

ABSTRACT:
An apparatus for measuring a permanent displacement of an elastic contact segment of a terminal having a displacing load imposing unit, wherein a terminal to be measured is clamped on a surface of a terminal mounting plate, a load imposing head is operated to impose load onto the elastic contact segment of the terminal with its load imposer, a displacement of the load imposing head is measured by a measuring instrument and the contact between the load imposer an the elastic contact segment of the terminal is detected by a circuit tester. An initial contact position of the load imposer with the elastic contact segment is measured at first and continuing to load the elastic contact segment until it reaches a predetermined deformed position. This deformed elastic contact segment is inprocess heat treated and then unloaded by reversing the movement of the load imposer after completing the heat treatment. A leaving position of the load imposer from the elastic contact segment is measured, and then a permanent deformation of the elastic contact segment is measured by a difference between the displacement from the predetermined deformed position to the leaving position and the displacement from the initial contact position to the predetermined deformed position.

REFERENCES:
patent: 4056773 (1977-11-01), Sullivan
patent: 4118091 (1978-10-01), Frisby
patent: 4924709 (1990-05-01), Plyter
patent: 5370543 (1994-12-01), Hamada et al.
patent: 5775936 (1998-07-01), Tsuji
patent: 5841291 (1998-11-01), Liu et al.
Ch. Rohrbach, Handbuch fur experimentelle Spannungsanalyse, VDI-Verlag, Dusseldorf, 1989, pp. 486-489.

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