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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).
Lanjutan
Two days
Instruksi
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.
Material untuk langkah ini:
Papan Kayu Keras1 buahAlat yang dibutuhkan:
Mesin bubut kayu
Jangka Sorong Digital 6 Inci2
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.
Material untuk langkah ini:
Pasir cetak2 kg
Minyak Biji Rami0.1 liter
Tepung0.1 kgAlat yang dibutuhkan:
Oven3
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.
Material untuk langkah ini:
Gumpalan kuningan1 kg
Arang1 as requiredAlat yang dibutuhkan:
Rangka cetak pasir (atas dan bawah)
Perapian pandai besi
Kowi Tanah Liat Tahan Api
Penjepit Kowi
Gergaji Besi
Kikir Logam
Celemek Kulit
Sarung tangan las
Kacamata pengaman5
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.
Alat yang dibutuhkan:
Ragum Meja
Set pembuat ulir
Jangka Sorong Digital 6 Inci6
6
Metal for a fitting
Metal for a fitting
Memuat notebook Jupyter…
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.
Bahan
6- 1 buahPlaceholder
- 2 kgPlaceholder
- 0.1 literPlaceholder
- 0.1 kgPlaceholder
- Placeholder
- 1 as requiredPlaceholder
Alat yang Diperlukan
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Cetak biru ini membuat
Blueprint terkait
Blueprint ini berbagi pengetahuan — teknik, bahan, atau prinsip
CC0 Domain Publik
Cetak biru ini dirilis di bawah CC0. Anda bebas untuk menyalin, memodifikasi, mendistribusikan, dan menggunakan karya ini untuk tujuan apa pun, termasuk komersial, tanpa meminta izin.
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