what process do i use to produce this piece?

[87527]

Hello everyone, I am a student at the iii year of mechanical engineering and this is my first message on this forum
I would like to ask you to give me a hand with the exercise that I uploaded as an attachment to this message: I must indicate the most suitable melting process for the specified piece.
I propose my solution here later but I am aware that it will probably be wrong being only at the beginning in the study of mechanical technology. I thank those who will have the patience to help me with this exercise :3513:

possibility 1 : fusion in green ground. Although it would be the cheapest solution I think it is to be discarded as it would not guarantee a good roughness on the passing hole that, due to its geometry, is not easily finished (on this motivation I am a little uncertain)
possibility 2: coldbox process; the problem should be the same as the previous point.
possibility 3: shell moulding (coated in shell). seems to me the most suitable process because it allows to obtain good tolerances and roughness on the inner hole sufficiently low. you get components that as in this case can have thin sections. the cost of the mold for the models is high but if the production is quite wide and durable the costs are amortised thanks to the low energy costs and especially to the fact that this process will not need successive processes of finishing particularly important (reduction times=reduction costs).
possibility 4: use a model to lose in polystyrene or a lost wax process; I think it is preferable to have a polystyrene model as it costs less.
possibility 5: process with permanent form; it is not applicable because the bronze is not basphoning (it is not copper; bronze = solid solution copper+wood) and then would have high costs.
possibility 6: die-cast. It seems to me a discreet solution but of costs greater than 3.

I would therefore choose the possibility number 3: fusion in shell or shell moulding.

 

[SHIREN]

Hi.
Welcome to the Italian prog community
It is a liquid curve at 90° from the thickness that is detected by your sketch 11.25 +-1.25 I deduce that it is a dn 200
production 100 pieces per month is relatively low
where
the solutions you described
1) internal wrinkle depends on the operator or animist and his experience in shaping and manipulating lands
2)idem
3) eighth idea only that you have to build two cast iron cores for shell sands one for the outside and another for the inner part very high costs
4) polystyrene or communememte polystyrene 1 model for each merge little established dimensional the surfaces that are obtained depend on the operator's manual
5) excellent solution permanent model
construction of an aluminum model with cad/cam technology with its aluminium core case if we want to use co2 cores http://www.ispesl.it/buonepratiche/metallurgia/fonderie/3_4.pdfcast iron core case if we want souls in shell
6) is not a piece whose importance and production numbers require a die-cast where you should still insert a soul

for external wrinkle you can use a red sand cap from foundry
and then fill the rest of the bracket with green ground
in this type of manufacture the flanges are to be worked
in your shizzo there is an indication of wrinkle
it would be better to put on a working symbol
Thank you very much

 

[87527]

thanks you were very precise:finger:
If you want to learn more about the subject in a practical way than in university courses there are documentation sites you know?

 

[meccanicamg]

thanks you were very precise:finger:
If you want to learn more about the subject in a practical way than in university courses there are documentation sites you know?

the builders of betonpompe fittings where they have your own particular draw it from shell (shell). prepare the mold and melt. It's a good result and you can do all the special leagues you want.