spaceflightmeow
Active Member
I'm confused about how the shop head is formed when a rivet is driven with the rivet gun on the manufactured head side. Does the process rely on the surrounding sheet deflecting in order to transfer impact momentum to the bucking bar? Say the rivet is dropped into a countersunk hole and sits flush. Since it can't be displaced any further, the rivet gun blows to the head cannot transfer momentum to the bucking bar unless the surrounding sheet deflects as well. Isn't that risky since you are bending the sheet and potentially making smilies?
This video by Disney on riveting raised the question:
http://youtu.be/dyXEjn7f330?t=9m30s
You see the rivet gun stationary on the manufactured head, holding the rivet in the countersunk hole, and the bucking bar striking the rivet from the bottom to form the shop head. Seems like it would be the opposite way around.
Back-riveting makes more sense to me. The rivet sits flush in the skin and a steel plate backs up both the skin and the rivet. The rivet gun then bangs on the shop head side and strikes ONLY the rivet, transferring momentum directly into the rivet rather than relying on skin deflection.
This video by Disney on riveting raised the question:
http://youtu.be/dyXEjn7f330?t=9m30s
You see the rivet gun stationary on the manufactured head, holding the rivet in the countersunk hole, and the bucking bar striking the rivet from the bottom to form the shop head. Seems like it would be the opposite way around.
Back-riveting makes more sense to me. The rivet sits flush in the skin and a steel plate backs up both the skin and the rivet. The rivet gun then bangs on the shop head side and strikes ONLY the rivet, transferring momentum directly into the rivet rather than relying on skin deflection.