IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
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.
Àárín
Half a day
Ìlànà
1
1
Strip width
Strip width
Ń ṣí ìwé 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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Pẹlẹbẹ Bàbà0.01 sqm
Pẹlẹbẹ Bronse0.01 sqmÀwọn irinṣẹ́ tí a nílò:
Abẹ́rẹ́ Ìkọ Ìlà
Ìlàǹkàn irin
Àkójọ Ìfá
Òṣùwọ̀n Kálípà Díjítà Ìnṣì 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.
Àwọn irinṣẹ́ tí a nílò:
Bulọ́ọ̀kì ìṣẹ̀dá oníhò
Ọ̀pá ìyípo irin
Òòlù olórí bọ́ọ̀lù4
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ìdí Oyin5 gÀwọn irinṣẹ́ tí a nílò:
Àwo ìfàokùn irin
Ẹmú ìfàgùn
Ìdìmú TábìlìỌ̀pá ìyípo irin5
5
Anneal between draws
Anneal between draws
Anneal at a dull red and quench whenever it stiffens.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Omi5 lítàÀwọn irinṣẹ́ tí a nílò:
Ọ̀pá Iná Pùróféènì
Bíríkì aládùúró-iná
Ẹmú alágbẹ̀dẹ
Àpótí ìtutù6
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Sọ́ldà Fàdákà2 g
Fúlọ́ksì5 gÀwọn irinṣẹ́ tí a nílò:
Ọ̀pá Iná PùróféènìBíríkì aládùúró-iná
Gíláàsì ààbò7
7
Trim and measure
Trim and measure
Cut off the tapered end, file the ends square and measure the outside diameter.
Àwọn irinṣẹ́ tí a nílò:
Àkójọ ÌfáÒṣùwọ̀n Kálípà Díjítà Ìnṣì 68
8
Troubleshooting
Troubleshooting
Tube drawing troubleshooting.
Flow
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Àwọn ohun-èlò
6- 0.01 sqmÀyè
- 0.01 sqmÀyè
- 5 gÀyè
- 5 lítàÀyè
- Àyè
- 5 gÀyè
Àwọn irinṣẹ́ tó nílò
15- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
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