Quality control method

Details Quality control method Quality control method

1982-07-14

1984-12-25

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to torque

7386253, G01L 526

Patent

active

044896174

ABSTRACT:
A method of testing an assembly which is adapted to move in a predetermined motion through a cycle including the steps of applying a controlled force to the assembly, dividing each cycle of the assembly into a plurality of increments, sensing the force applied to the assembly during each increment, sensing the difference between the highest force and the lowest force sensed during a particular increment, setting a differential force limit for a particular increment and comparing the sensed difference between the highest and lowest force sensed during a particular increment with the set differential force limit and generating a first signal representative of an unacceptable assembly if the sensed differential force is not within the differential force limit.

REFERENCES:
patent: 3765233 (1973-10-01), Germann
patent: 3952506 (1976-04-01), Hanson et al.
patent: 4144746 (1979-03-01), Maringer et al.
patent: 4274438 (1981-06-01), LaCoste
patent: 4400981 (1983-08-01), Aoyagi et al.

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