Joining jig and joining member coupling method using the joining

Details Joining jig and joining member coupling method using the joining Joining jig and joining member coupling method using the joining

1997-06-05

1999-09-07

Watson, Robert C.

Metal working

Means to assemble or disassemble

By deforming

29517, 29520, B23Q 100

Patent

active

059467860

ABSTRACT:
In a workpiece joining method using a joining jig, a distal end portion of a bolt shaft is inserted into each hole of at least one workpiece, and a sleeve is disposed onto a distal end portion of each bolt shaft. Then, an upper die of the joining jig is lowered toward the workpiece supported on a lower die so that while the workpiece is being pressed toward base end portions of the bolt shafts, a tightening portion of each nose provided on the upper die draws the outer wall of the corresponding sleeve, thus tightening the sleeves. As the tightening process progresses, the tightened portion of each sleeve progressively enters a relief portion formed immediately above the tightening portion. The thrust of the noses does not directly acts on the bolt shafts in the direction of their axes, so that the joining jig can apply a sufficient tightening force without being restricted by the strength of the bolt shafts.

REFERENCES:
patent: 2488566 (1949-11-01), Sperry
patent: 2542376 (1951-02-01), Torresen
patent: 3803793 (1974-04-01), Dahl
patent: 3989081 (1976-11-01), Sigmund
patent: 4012828 (1977-03-01), Dahl
patent: 4867625 (1989-09-01), Dixon
patent: 5722647 (1998-03-01), Rattaro et al.
T. Sakai et al., "A Study of Mechanism How Sleeve-Caulking-Fastening Method Produces Clamping Force", report filed in The 74th JSME Fall Annual Meeting in Japan, Sep. 21, 1996, vol. IV, No. 96-15, pp. 51-52.
K. Hoffer, "Konstruktionskataloge fur Blindnietverbindungen im Leichtbau", VDI-Berichte Nr. 493, (1983), pp. 49-59.

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