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A
amitshah1-Visitor
1-Visitor
January 23, 2013
Solved

Can anyone help me to create this part in Sheetmetal.

  • January 23, 2013
  • 2 replies
  • 4728 views

Hi,

I have a cretical part and need to create in sheetmetal.

Is there any way to create such part.

regards

Amit


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Best answer by TomD.inPDX

Sorry for the previously deleted post. I have attached a 3D PDF for how the model is made in accordance with my previous posts (which admittedly has some errors now that I went through the modeling process).

There is some critical data missing from the input drawing. I made some guesses as to what the values should be.

One thing that I ran across, and have run across this before in machine parts, is the filleting of the transitions. These are not mere fillets, but need to be "drawn" from the center. Variable Fillets are not the answer for a true cam following if the contact is linear. You will see what I mean when you build the part.

You can view the attached file with Acrobat Reader. Just click the screen and the 3D will activate.

one thing I learned by doing this exersize is that Helical Sweet -really- needs an Angle option. The value 12.666666667 is always rounded and with the calculation in Creo 2.0 dialogs rounds to the current number of decimals (really poor form, PTC!).

2 replies

C
Constantin15-Moonstone
15-Moonstone
January 23, 2013

Hi Amit,
this would have to be a welding assembly.
The basic container part can be created using a "Form" feature. The bottom needs to be created separately.

Dale_Rosema
23-Emerald III
Dale_Rosema23-Emerald III
23-Emerald III
January 23, 2013

Is it a deep drawn part? Would the holes need to be done in a secondary operation?

T
TomD.inPDX17-Peridot
17-Peridot
January 23, 2013

You could make this part easily in sheetmetal using a form or die tool. You will need to model the form/die as a normal part. Please explain why it must be a sheetmetal part? I suspect you cannot flatten it once created as it is a deep drawn part.

This part can be created in several ways. I recommend making it as a part and using the shell command.

To get the cam profile, use the helical sweep function to accurately control the critical surface.

Since you have to make either the male or female side of the die anyway, the sheetmetal creation is secondary process in creating the desired result. To make the die you can begin with solids, or define the surface of the die. See the help files for form tools.

A
amitshah1-VisitorAuthor
1-Visitor
January 24, 2013

Hi Guys,

I am more concern about the profile shown(i.e developed view).

I may go for the deep draw operation, but how I can achieve the profile mentioned.

Or is there any other way apart for deep drawing where I can create the mentioned profile.

T
TomD.inPDX17-Peridot
17-Peridot
January 24, 2013

I see, you are asking the engineering question rather than the software tool. No matter what, this is a deep drawn part and will require stamping. Tool makers will make sure you get the part you need in the end. All you have to do is define it correctly. On the drawing you should define minimum material thickness' in highly drawn areas. That critical surface is easy to create by the tool makers.

There is one point of concern on the developed view profile. from 0-90 it is 3.2(Z) then another 3.2(Z) from 90-180, but only 3.1(Z) from 180-270. Did someone get careless or is this the true intent? Does it reach 9.5 just -before- 270? Is there a sharp step at 180 or is it radiused at the step? Technically, this may not be completely defined. Its the little things that can trip you up but as you claim they are critical, these questions should be asked.

You just need to send the complete drawing and probably the 3D model out for quotation and respond to inquiries from suppliers.

If you want a prototype of this part, you may have other options to consider like rapid prototyping or machining.

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