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SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Copper and Brass Tube Drawn from Strip
Jewellers make tube from flat strip: the strip is curled into a gutter, then pulled through the shrinking holes of a drawplate, which closes it into a round tube with a seam along it. Drawn over a steel rod, the bore comes out the rod's size. The seam can be silver-soldered for a sealed tube. Copper and brass are both drawn this way, annealed between draws.
Kati
Half a day
Maagizo
1
1
Strip width
Strip width
Inapakia daftari la Jupyter…
2
2
Cut the strip
Cut the strip
Mark and cut a straight strip of annealed copper or brass sheet to the width, and taper one end to a point over 2 cm. File the long edges square.
Vifaa kwa hatua hii:
Bamba la Shaba0.01 sqm
Bamba la Shaba ya Njano0.01 sqmZana zinazohitajika:
Kichora Mistari
Mkasi wa bati
Seti ya tupa
Kipima-unene cha dijitali cha inchi 63
3
Curl it
Curl it
Lay the strip over a groove in the swage block and hammer a steel rod down on it so it curls into a U along its whole length; close the tapered end round the rod by hand.
Zana zinazohitajika:
Kibao cha kutengeneza chenye matundu
Fimbo ya kuundia ya chuma
Nyundo yenye kichwa cha duara4
4
Draw it closed
Draw it closed
Wax it and pull it through the drawplate with the seam facing up, starting in a hole that just takes it. Go down the holes until the edges meet; draw over the steel rod to size the bore.
Vifaa kwa hatua hii:
Nta ya Nyuki5 gZana zinazohitajika:
Bamba la chuma la kuvuta waya
Koleo la kuvuta
Kibano cha meza ya kaziFimbo ya kuundia ya chuma5
5
Anneal between draws
Anneal between draws
Anneal at a dull red and quench whenever it stiffens.
Vifaa kwa hatua hii:
Maji5 litaZana zinazohitajika:
Tochi ya Propani
Tofali la moto
Koleo za mhunzi
Ndoo ya kupoza chuma6
6
Solder the seam
Solder the seam
For a sealed tube, flux the seam and run silver solder along it with the torch. Pickle and rinse.
Vifaa kwa hatua hii:
Lehemu ya Fedha2 g
Fluksi5 gZana zinazohitajika:
Tochi ya PropaniTofali la moto
Miwani ya usalama7
7
Trim and measure
Trim and measure
Cut off the tapered end, file the ends square and measure the outside diameter.
Zana zinazohitajika:
Seti ya tupaKipima-unene cha dijitali cha inchi 68
8
Troubleshooting
Troubleshooting
Tube drawing troubleshooting.
Flow
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Vifaa
6- 0.01 sqmKishikilia Nafasi
- 0.01 sqmKishikilia Nafasi
- 5 gKishikilia Nafasi
- 5 litaKishikilia Nafasi
- Kishikilia Nafasi
- 5 gKishikilia Nafasi
Zana Zinazohitajika
15- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
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