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Continuous Wire Drawing from Rod
Commercial wire starts as a coil of hot-rolled rod about 9 mm thick. After the scale is removed, the rod is pulled through a row of ever smaller dies, each wrapped round a driven drum, or block, that pulls it on to the next; one machine may hold 3 to 12 dies. Each die takes away 15–25 % of the area on fine wire and 20–45 % on heavier wire, and the wire gets longer as it gets thinner. Cold drawing makes it stronger; if the total reduction passes about 50 % it is annealed before drawing on. High-carbon steel rod gives music wire, stainless rod stainless wire, and copper rod copper wire, which may get a final anneal for ductility and conductivity.
Abantado
Continuous (industrial)
Mga Tagubilin
1
1
Clean the rod
Clean the rod
The hot-rolled rod, about 9 mm, is uncoiled and its scale is removed.
Mga materyales para sa hakbang na ito:
Wire rod na high-carbon na asero1000 kg
Wire rod na stainless steel1000 kg
Wire rod na tanso1000 kg2
2
Point and string up
Point and string up
The end is pointed, pushed through each die and wound round each block in turn: this is called stringing-up.
Mga kailangang kasangkapan:
Tuloy-tuloy na makinang panghila ng kawad
Die na tungsten carbide para sa paghila ng kawad3
3
Draw
Draw
Lubricant floods the dies while each block pulls the wire through the next, smaller die; each block turns faster than the one before.
Mga materyales para sa hakbang na ito:
Pampadulas sa paghila ng kawad1 litroMga kailangang kasangkapan:
Tuloy-tuloy na makinang panghila ng kawadDie na tungsten carbide para sa paghila ng kawad4
4
Anneal when needed
Anneal when needed
Past about 50 % total reduction the wire is annealed before further drawing. A final anneal may follow to make the wire more ductile and, for copper, more conductive.
Mga kailangang kasangkapan:
Pugon ng pagpapalambot5
5
Gauge and coil
Gauge and coil
The finished diameter is measured and the wire is wound onto reels or coils.
Mga kailangang kasangkapan:
Digital na Kalibrador 6 PulgadaMga Materyales
4- Placeholder
- 1000 kgPlaceholder
- 1000 kgPlaceholder
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Mga Kinakailangang Kasangkapan
4- Placeholder
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