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Brass Fittings: Sand-Cast on a Core, Then Tapped
Couplings, elbows, tees and nipples for pipes are cast in brass around a sand core that forms the bore, then threaded. Turn a wooden pattern with core prints at the ends, bake oil-bonded sand cores, cast in green sand, and tap or die-cut the threads.
The picture: a wooden core box with its sand cores (left), and the pattern with the finished casting (right).
Abantado
Two days
Mga Tagubilin
1
1
Turn the patterns
Turn the patterns
Turn a wooden pattern of each fitting a little oversize for shrinkage and machining, with a stub, the core print, at each open end. Make a split wooden core box for the bore.
Mga materyales para sa hakbang na ito:
Tabla ng Matigas na Kahoy1 pirasoMga kailangang kasangkapan:
Torno sa kahoy
Digital na Kalibrador 6 Pulgada2
2
Make and bake the cores
Make and bake the cores
Mix sand with a little linseed oil and flour, pack it into the core box, scrape it level and bake the cores in an oven at 200–250 °C until hard.
Mga materyales para sa hakbang na ito:
Buhangin sa paghuhulma2 kg
Langis ng Linsid0.1 litro
Harina0.1 kgMga kailangang kasangkapan:
Hurno3
3
Mould and pour
Mould and pour
Ram the pattern in green sand in the flask as in the sand casting blueprint. Lift the pattern, set the cores in the prints left by the core prints, close the flask and pour the brass, melted outdoors in a crucible in the charcoal forge.
4
4
Knock out and fettle
Knock out and fettle
When cool, break out the sand and the cores, saw off runner and riser and file the castings clean.
Mga materyales para sa hakbang na ito:
Bareta ng tansong dilaw1 kg
Uling1 as requiredMga kailangang kasangkapan:
Kahong panghulma (itaas at ibaba)
Pandayan ng panday
Krisol na Luwad na Matibay sa Apoy
Sipit ng Krisol
Lagaring Pang-metal
Kikil na Pang-metal
Delantal na Katad
Mga guwantes sa paghihinang
Salaming pangkaligtasan5
5
Thread them
Thread them
Hold each fitting in the vise and cut inside threads with the tap, outside threads with the die, using a little oil. Check them on a pipe.
Mga kailangang kasangkapan:
Bais sa Mesang Panggawa
Set sa paggawa ng sinulid ng turnilyoDigital na Kalibrador 6 Pulgada6
6
Metal for a fitting
Metal for a fitting
Naglo-load ng Jupyter notebook…
7
7
Limits
Limits
Cores and core prints as Wikipedia describes them; the oil-and-flour binder and the sizes are ours. Melt brass outdoors: it gives off white zinc-oxide smoke.
Mga Materyales
6- 1 pirasoPlaceholder
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- 0.1 litroPlaceholder
- 0.1 kgPlaceholder
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- 1 as requiredPlaceholder
Mga Kinakailangang Kasangkapan
14- Placeholder
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Ang blueprint na ito ay gumagawa ng
Kaugnay na Blueprint
Ang mga blueprint na ito ay nagbabahagi ng kaalaman — mga teknik, materyales, o prinsipyo
CC0 Pampublikong Domain
Ang blueprint na ito ay inilabas sa ilalim ng CC0. Malaya kang kumopya, magbago, mamahagi, at gumamit nang walang pahintulot.
Suportahan ang Maker sa pamamagitan ng pagbili ng mga produkto sa kanilang Blueprint Komisyon ng Maker itinakda ng mga Vendor, o lumikha ng bagong bersyon ng Blueprint na ito at isama bilang koneksyon sa iyong Blueprint upang ibahagi ang kita.