Metal working – Method of mechanical manufacture – Work holding
Patent
1990-11-28
1992-09-01
Echols, P. W.
Metal working
Method of mechanical manufacture
Work holding
295252, 29897, 298972, 292811, 269 32, B23P 1102
Patent
active
051427648
ABSTRACT:
A spar assembly jig for tack-free positioning of aircraft spar components for subsequent fastening at a second location is provided. Pneumatically operated clamps are mounted on the frame of such jig. The spar components are laid up in such jig and the clamps closed thereon to hold the members together as opposed to the prior art method of securing such components together by temporary fasteners or tacking. The assembly jig and so-assembled and clamped spar components are than transported by overhead crane to an automatic riveting machine. The jig and spar components are lowered into place before such riveting machine, which has a jaw defined by a spindle and anvil which fits above and below the jig assembly. The clamps have a swing-away feature such that as the spindle and anvil approach eg. an area where a clamp holds an endcap to a web of a spar, the clamp swings away therefrom and out of the way of the spindle above and anvil below so that such machine can drive a rivet through endcap and web at or near the spot vacated by the swing-away clamp. The machine then moves on and the clamp re-closes on the spar components. After riveting of the spar components is completed, the jig assembly and so-fastened spar therein can be lifted off the riveting machine and transported away by overhead crane to storage or to the next work station, which promptly frees up the riveting machine for another operation. Accordingly method and apparatus for positioning, clamping and riveting components of a structure together, in a no-tack operation is provided.
REFERENCES:
patent: 2342025 (1944-02-01), Watter
patent: 2378043 (1945-06-01), Sorensen et al.
patent: 2430438 (1947-11-01), Watter et al.
patent: 2451454 (1948-10-01), Watter
patent: 2567124 (1951-09-01), Roberts
patent: 3643900 (1972-02-01), Maloney
patent: 3827661 (1974-08-01), Ryan et al.
patent: 4295262 (1981-10-01), Grote et al.
patent: 4682765 (1987-07-01), Mainville
patent: 4894903 (1990-01-01), Woods
Bryant David P.
Echols P. W.
Singer Donald J.
Stover Thomas C.
The United States of America as represented by The Secretary of
LandOfFree
Method for tack-free positioning of aircraft components for subs does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for tack-free positioning of aircraft components for subs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for tack-free positioning of aircraft components for subs will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-759384