advice from an expert funnel.

[silvius]

Good morning.
I have to get a cone trunk.
Lower diameter 40mm
upper diameter 131mm
height 52mm
thickness: fine between 0.1 -1.5 mm

I attach a sketch

Allego punzone realized.....roaring punzone 2.2 mm

matrice allego realized.....Matrine radius 1.1mm....game 0.1mm over thickness material

allego results obtained with aluminium sheet from 0.5mm and 1 mm

I would like to make "say the plate " from 0.2 mm bronze sheet......

How do I solve my problem?... basically after not even 10mm rush of the punch breaks the sheet.... .
I'm currently making a single pass.

the finished product is for personal use....so not necessary of important precision


Thank you.

 

[silvius]

allego that I had problems with files:

 

[Mike1967]

Is the aluminum you used to fold?
I had done such a thing, less cone, but I had done
the radius of the matrix much wider, perhaps depends on that.

 

[silvius]

Yes, photos report the aluminum used for testing.
I try to increase the array.... do you have a value?


Thank you.

p.s. since you are a moderator, you could delete the attachment of the first place I had problems with tapatalk.

 

[Mike1967]

Look, I made a radius of 4-5 mm, I didn't need to be precise, but I repeat that my cone was less high ( proportionately) and the funnel was made on a 1.5 mm thick lam.

about the image, I am not moderator of this area.
try from your user panel, you should find the list of files you have published and from you can proceed to the deletion.
At the most, one of my colleagues in this area will be working.
:smile:

 

[gio14]

look, from what I know in matter to put on a conical object is one of the most rognose things, honestly I have never realized objects of this type, however I do not think you can realize it with a single passage, I think it takes at least 3 almost cylindrical blooms starting almost from the maximum diameter and going down for about 1/3 with a very rounded punch and then via the other 2, then the last shot you do it with

 

[SHIREN]

Hi.
It's not my job.
I have an ostic moment:
but your particular form at the lathe
you have to put your punch in the spindle
cut off an appropriate diameter aluminum disc
fixing it to the punch by means of the cylindrical part of the counterpoint
and with the help of a stick in hard wood essence
leaning on a support try to bend the disk on the punch
if you do not have the specific experience and quite dangerous
Thank you very much
p.s.
find on the web
how to produce aluminum pots

 

[Counterblow Hammer]

Good morning.
I have to get a cone trunk.
Lower diameter 40mm
upper diameter 131mm
height 52mm
thickness: fine between 0.1 -1.5 mm

I attach a sketch

Allego punzone realized.....roaring punzone 2.2 mm

matrice allego realized.....Matrine radius 1.1mm....game 0.1mm over thickness material

allego results obtained with aluminium sheet from 0.5mm and 1 mm

I would like to make "say the plate " from 0.2 mm bronze sheet......

How do I solve my problem?... basically after not even 10mm rush of the punch breaks the sheet.... .
I'm currently making a single pass.

the finished product is for personal use....so not necessary of important precision


Thank you.

Bye!

Having a quick look I would say that there are problems regarding the thicknesses (too much esigui to perform a unique pass!!!) and with the rays: In fact, the clique snows in all cases on the bottom radius (where the material at the end of the fair is more stressed...). I would never wish that the low connection radius on the matrix favors an impunity of the material resulting in a breakage for excessive stretching. . .
is to be understood if you also use a sheet metal premium: the tension of traction that this generates could, in conjunction with the "frenant" effect of the matrix beam, be more harmful than beneficial.

I recommend to take a look at the matter as written on "handbook of metal forming" of k. lange (you also find it on google I think) to understand whether the productive parameters are correct or not.

However personally I would recommend to realize the piece (I see the small number of pieces!) by funneling the lathe.
or if you have a test mode (the thing is a little too much, but maybe on the 1.5 mm sheet it could work) perform the molding on heated sheet.