cutting drum

[davide75]

Hello boys, I ask you for help in the modeling of the attached piece.
work in the field of the bakery and many times we have to make drums of cutting of complex shapes like that attached or of simple forms like tondi for pizza. As long as it is simple shapes like tondi I can project the circumferences through the command projects sketches on superifices (I guess to understand us) in the sketch 3d then after use the command "correcise" and then "inspessisco" so when the inventor drum
The annex was sent to me by my supplier using toptron. Do you have any ideas? ?

 

[davide75]

I add a simple and shaped drum in inventor

 

[MBT]

Um, can it make sense to use a sheet metal, explain it, do the casework and fill it up?

 

[davide75]

already tried but when calandro enlarges me the mold.to tell us if I make a circle like in the third photo and then calandro I no longer have the real circumference but elongated

 

[Tarkus]

I did something like that, too.
I ask you some delucidation:
-The "simple" drum is made with blades or is it dug by full piece?
-The drum with hexagonal cuts seems to be made from full piece, in fact you see the fittings on the bottom of the hexagonal cells.
iho, if so, compatibly with the size of the piece, perhaps it should be obtained from full piece. .

 

[davide75]

hi tarkus, the simple drum is a unique part in the sense that with the process I use usually and that I mentioned at first I can make a unique part (if you want tomorrow I attach an example so you can understand from the various processes ). the drum is not dug to understand that hexagonal cells have sent it to me so the supplier and I believe that they have obtained it from full radius.
Your attachment is fine if the blades are single, but if I have to make shapes for example rounds where I need circumference and diameter to maintain when the shapes are wrapped on the drum arise problems, especially when I have complex shapes.
Anyway I'd like to know how you shaped your drum so much to make comparisons about modeling and maybe understand better.

 

[Tarkus]

for now I have done this using the bouncing command, which can do the exact envelopes.
only that this object so sketched, "weight" already 39 mega.
And I can't even tie him up.
tomorrow I try to do it with subtraction of solid to see if it is leaner.. .

 

[davide75]

Hello tarkus, I'll coach you a simple drum.
as you see from the processing in this way I can project the circumferences well so that the measure remains the same once enveloped on the cylindrical surface, so when the drum rotates and affects the dough makes me a perfect round shape.
As for your file I know that the weight is in line with ours when we make drums with small silhouettes where I make circular series along the chinconference and then serialize along the drum axis.Repeto however that the problem arises for complex forms where to show the thickness of the sheet I have intersections when serialization and therefore everything becomes a mess because I can not make precise silhouettes

 

[Tarkus]

Yes, it is logical, more serialized complex forms, the more weighted.
but since you talk about sheet metal, even for hexagonal cell mold, would you really want to make blades with sheet metal?
What size are+/- hexagons?

 

[davide75]

the most interesting thing is to be able to shape the drum, so much then our supplier thinks about it.
for round base drums usually the supplier uses a pipe or perforated bar and weld over the shaped sheet for the shape we want to get.
for complex forms such as the hexagonal one the drum was made in delrin digging from full, making it in sheet metal would be interesting but sincerely I do not know how to do. some complex shape drums were made with the sheet but the modeling was very messed up so that sometimes we gave only the development of forms and thought the supplier to do well the drum so that the development was equal to what we had provided. the problem arises precisely when I have the intersections of the plates that define the forms.
I don't have the measurements for the hexagon. I'll look at you tomorrow.

 

[davide75]

hexagon has size 50x40 mm where 40 is the key socket to understand us

 

[davide75]

tarkus can I ask if please you can send me the cut drum file to see how you managed it? ?

 

[Tarkus]

Hello, David,
The file is too big to be attached.
send me an mp with your email that I attach it to you.
What release do you have?, I did it with 2014..