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Pop Rivets: Hollow Rivet on a Break-Off Former Shank (Cherry 1939)
A rivet you set from one side. Cherry threaded a hollow rivet onto a shank with a bevelled head, the former, at the far end. Pull the shank while pushing on the rivet head and the former spreads the rivet's tail against the back of the work. A groove in the shank makes it break at a set pull, so every rivet is set to the same tightness.
Source: Carl W. Cherry, US 2,183,543 (1939). Unknown: the metal and the dimensions. Cherry gives neither, so both are linked to unknown heads. Turning the parts on a lathe and setting them with a pop rivet gun are ours. Picture: the patent's drawing.
Hejuru
1 day
Amabwiriza
1
1
Turn the hollow rivet
Turn the hollow rivet
Turn a tubular rivet with a head formed at one end and a passage right through it. Unknown: the metal and the sizes.
Ibikoresho by'iyi ntambwe:
Icyuma kitazwi1 as requiredIbikoresho bikenewe:
Imashini yo guhinguza icyuma
Icyegeranyo cy'ibikoresho by'imashini izunguruka (HSS)
Kalipe ya Vernier
Ingano zitazwi2
2
Turn the former shank
Turn the former shank
Turn a shank that slides through the rivet's passage, with a former head at one end: no wider than the rivet, and bevelled on its inner edge where it meets the rivet's tail. The bevel sets the angle the tail spreads to. Cut a groove around the shank where it should break.
Ibikoresho by'iyi ntambwe:
Icyuma kitazwi1 as requiredIbikoresho bikenewe:
Imashini yo guhinguza icyumaIcyegeranyo cy'ibikoresho by'imashini izunguruka (HSS)Kalipe ya VernierIngano zitazwi3
3
Assemble and set
Assemble and set
Push the shank through the rivet so the former sits against the tail. Put the rivet into matching holes in the work. Press on the rivet head and pull the shank at the same time (Cherry's tool: a casing with a dolly on the head, and a shank holder pulled by cammed handles; ours: a pop rivet gun). The former spreads the tail against the far plate. Then the shank breaks at its groove, and the broken pieces fall out of the passage.
Ibikoresho bikenewe:
Icyuma Cyivumbura Gihagaze
Agatsiko k'imbunda y'utuma
Amadarubindi y'umutekanoIbikoresho
1- 1 as requiredUmwanya
Ibikoresho bikenewe
7- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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