molding - bava top

[Oslo12]

Hi guys, I've been in writing for a while but I've never posted anything, I have to say I always find valuable tips you give.
I introduce myself, I am paris and study ing.mecc, I am to the third year and I am facing the classic work of mechanical technology. .
I got stuck just in the end.
I have to sketch out the stamping cycle of this component (child) and I have not quite understood how to choose the bava plan (the treatment that I found in this regard is quite summary). I tried a few things, but they won't convince me at all. .
How caspita do I have to place it according to you to sketch a process that is likely?

Thank you very much

 

[TECNOMODEL]

Is that the plan of the bava?
I've been working for a while now but I've never heard of this definition. . . .

 

[Meteor02]

in fact a plan of a bava?? What do you mean to sketch out the molding cycle (and what molding) and what do you need this fantomatic bava plan? to sketch the stamping cycle you need to draw the mold? I mean, help us help you. maybe by plan of bava you mean the closing lines mold?

 

[Oslo12]

Yeah, sorry I didn't specify things.
We're talking about hot stamping and I have to do a mold sketch. .
the plan of bava is the plan that divides the two semi-stamps. .

 

[Meteor02]

hot stamping, for what little I know about metal stamping the only problem you can have is the inner thread that will be done of resumption, for the rest a little deformed and follow the closing lines that suggests the cad. I would say that your division line could be the horizontal half-work of the figure of dx (the one with the white rectangles above and below.

 

[TECNOMODEL]

if you want to make the hole (I don't know if it's feasible with that technology) you have only one possible division line, and it's the one created by the theoretical plane perpendicular to the axis of the hole itself and passing through the center of the piece.

 

[Oslo12]

Thanks for the answers, guys. I had also thought of this division, bearing in mind that making both holes with the same half-works is impossible, or is it not? Professor's handouts are a bit confusing, but at lesson he said that we must try to limit the cost of the mold with a few tricks. .
I leave the slide on it. .

 

[TECNOMODEL]

If it were a plastic piece or die casting you could make both holes, one with a fixed/mobile soul and one with a soul on a removable cart.
for hot stamping I don't think it's feasible, I don't know the matter well though.

 

[Oslo12]

in this case we talk about steel c45, sorry if I did not specify before

 

[meccanicamg]

the threaded hole don't make it molding, if you ever do a pre-forum and then you need a male to roll to do well a sturdy thread.
the plan bava they call it only in university but actually is the plan of the two semi-stamps where then you leave the channel expansion/recovery bava.
the plan of division can only be that one since the hole of the eyelet has to plough vertical, that is from the top or from the bottom will enter the shape plug and the bay compartment can work well to compensate for the difference of material that is carried radially outside.

 

[meccanicamg]

Thanks for the answers, guys. I had also thought of this division, bearing in mind that making both holes with the same half-works is impossible, or is it not? Professor's handouts are a bit confusing, but at lesson he said that we must try to limit the cost of the mold with a few tricks. .
I leave the slide on it. .

this slide says a little bit, and as always leaves common sense and practice over the years.
However, it is necessary to think about making caves in the mould easy to realize, to think that by gravity I must be helped to print and that pressing the material spreads in a theoretically spherical way regarding the center of its volume.
However it is a nice mess to make the hole of the thread in one pass if not impossible. it takes two phases of molding and one threading or one molding and two drilling and threading.

who has to make large batches does not use normal machine tools but special machines with automatic loading, automatic piece placement through anthropomorphic robot, swivel table with a drilling station and one threading in addition to the loading, unloading stations and faulty pieces.

 

[meccanicamg]

your prof has taken notes from the right/santocchi of mechanical technology, book widespread in university but quite lacunous. At least I attach you the explanation of your slide and a biella as it would be printed (which should be done as your piece).

 

[meccanicamg]

I attach a number of examples of multiple prints, the definition of the division plan and the classification of printable figures.

 

[Oslo12]

@meccanicamg Thank you! is all very useful material. .
Obviously I didn't expect to do the thread by molding, I was aiming at a pre-light. .
but since that part I still have to work on machine tools so much it is worth doing everything later, considering that I am facing the topic with a didactic approach that aims to simplify processes. .
indeed the just-santochi (which I have) I did not find it satisfactory at all on most topics, I am amazed that it is so widely recommended

 

[meccanicamg]

There will obviously be an economic report and commissions.
we used a technology book that I can't find anymore and I don't remember the title...written by writing machine and with china drawings and that was used a lot in the years behind... a bible of explanations. sometimes some images are used in the dispensers.