Mandrel stem length measurement system for use with blind rivet

Details Mandrel stem length measurement system for use with blind rivet Mandrel stem length measurement system for use with blind rivet

1995-04-20

1997-02-11

Jones, David

Metal working

Means to assemble or disassemble

Overedge assembling means

B21J 1528

Patent

active

056008783

ABSTRACT:
A blind rivet set verification system for setting a blind rivet and assessing the acceptability of the rivet set by measuring and comparing the length of the spent mandrel stem. The system includes a rivet setting apparatus and a programmed system control circuit. The apparatus includes a rivet setting tool, a mandrel stem collection box, and a collection tube connecting the tool and the box. The spent mandrel stems pass from the rivet tool to the collection box through the tube. Along the collection tube are provided a pair of sensors. The sensors are positioned in relatively close proximity to each other and to the box and provide the control circuit with information required to identify and compare mandrel stem length.

REFERENCES:
patent: 4836003 (1989-06-01), Blake
patent: 5035129 (1991-07-01), Denham et al.
patent: 5035353 (1991-07-01), Smart et al.

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