Metal working – Means to assemble or disassemble – Overedge assembling means
Patent
1996-06-17
1998-07-07
Vo, Peter
Metal working
Means to assemble or disassemble
Overedge assembling means
2952506, 72430, B23P 1100, B23P 1904
Patent
active
057749680
ABSTRACT:
A pneumatic system for absorbing and storing the recoil force of an electromagnetic riveter, and for positioning the elements of the machine where desired for optimal operation, includes a set of recoil cylinders connected between a base plate and a support plate on which the riveter is mounted. When the electromagnetic actuator of the riveter is energized and the recoil mass of the riveter is repelled away from the driver, the recoil cylinders absorb and damp the energy of recoil, and then the stored energy in the recoil cylinders acts to restore the recoil mass to its starting position. A set of damping cylinders prevents the recoil mass from slamming against the mechanism at the end of its return stroke. A set of pop-back cylinders holds the electromagnetic riveter at an elevated position wherein the end of the driver is clear of the top end of a shuttle having several stations, one of which holds a rivet die. When the machine has finished drilling a rivet hole and installing a rivet in the hole, the shuttle positions the rivet die under the driver and the pop-back cylinders are depressurized to allow the recoil cylinders to move the driver down against the die, which is moved down against the rivet, establishing hard contact between the electromagnetic actuator, the driver, the rivet die and the rivet. The actuator is energized, driving the die against the rivet and upsetting the rivet.
REFERENCES:
patent: 4122988 (1978-10-01), Casutt
patent: 4128000 (1978-12-01), Hogenhout et al.
patent: 4515302 (1985-05-01), Davern et al.
patent: 4862043 (1989-08-01), Zieve
patent: 4908928 (1990-03-01), Mazurik et al.
Neary Michael J.
Nelson Lawrence W.
The Boeing Company
Vo Peter
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