×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Sheetmetal question: pressed sheetmetal parts ?

Sheetmetal question: pressed sheetmetal parts ?

Sheetmetal question: pressed sheetmetal parts ?

(OP)
Hi Guys,

i have a sheetmetal part that is pressed into shape and as such is not a 'pure' sheetmetal part, that can be produced solely by bending(metal is streched in my case).

I tried modeling this in the sheetmetal environment, but inventor creates multiple single bends with gaps in between them. Basically i can only create the shape with pure (natural) bending and cannot simulate/model the (unnatural)pressed bending of the real part.

I ended up doing the multiple bends method and closing the gaps afterwards in model space with multiple loft features.

The downside is that inventor cannot create a flattened shape anymore, probably due to the loft features i guess.

Does this make sense?
Is there a more dignified/less sloppy way of doing something like this? neutral


 

RE: Sheetmetal question: pressed sheetmetal parts ?

Can you attach the part file here?
Probably a "dignified" technique of creating - but not getting the flat pattern without a 3rd party add-in.

RE: Sheetmetal question: pressed sheetmetal parts ?

(OP)
The flat pattern isn't that importand for this part, so that would be acceptable.

But i found it strange to have to switch between model and sheetmetal environments constantly. I don't understand the reasoning behind such different 'environments'.

What's the reasoning behind such different 'environments' really? One could then just as well create the whole thing as a part and don't bother with the sheetmetal, right(in this particular case)?



 

RE: Sheetmetal question: pressed sheetmetal parts ?

You forgot to attach the file here.
There is absolutely, positively no need to switch between environments.  This should be rather obvious.  Sheet metal environment simply offers some constrained tools that help get simple stuff quicker (uniform thickness and automitered corners - bend allowance calculation is the only real difference) and help make it a little less likely for beginners to make parts that won't unfold or with edges not perpendicular to flat face.
Attach your file here.

RE: Sheetmetal question: pressed sheetmetal parts ?

Another method for creating this part is to  create it all in surfacing. Then if the surface is complete, (No holes) you can thicken the surface. Remember I stated "another method" not "easier" as surfacing can be tricky until you master it.

Jim  

RE: Sheetmetal question: pressed sheetmetal parts ?

Would it be simpler to do the deformed section as a regular part, the sheetmetal section as a sheetmetal part, and do a boolean union of the two?  It would be somewhat less than convenient to make updates later, but at least you get the sections modelled efficiently in their "native" environments.  (This is assuming you need/want to take advantage of the sheetmetal functionality.)

Graeme

RE: Sheetmetal question: pressed sheetmetal parts ?

The OP hasn't responded in over a month - I think we can assume the problem is no longer of interest.
 

RE: Sheetmetal question: pressed sheetmetal parts ?

(OP)
OP is back in tha house.

Sorry for the late response chaps. I attached a sketch per illustration.

The basic shape is a simple "U" bend, but then tapered to the top, from half the height.

Since this part can only be forced fabricated (not by pure bending alone), I'm concerned it cannot be done purely in sheetmetal mode

 

RE: Sheetmetal question: pressed sheetmetal parts ?

Just model it in the part environment and move on.. No point in modeling that in the sheetmetal mode.  

RE: Sheetmetal question: pressed sheetmetal parts ?

Looks like a trivial simple part to model - if you have trouble figuring it out, attach your file here.

RE: Sheetmetal question: pressed sheetmetal parts ?

(OP)
Back them I modelled it switching between the two environments.

Afterwards, I was informed that it was usually done as a solid and then converted to a shell with a certain thickness.

p.s. the shape is much more complex than my sketch by te way, it was the tapering i was worried about.

Is it also correct that a flat pattern cannot be made from a hybrid part like mine? Only works for pure sheetmetal parts?

RE: Sheetmetal question: pressed sheetmetal parts ?

Flat patterns can be made from ANY valid part using any Inventor tools.

Constant thickness
Cylindrical or conic bends
Planar faces
Cylindrical or conic faces
and some special geometries created with Inventor Sheet Metal tools (like Lofted Flange....).

RE: Sheetmetal question: pressed sheetmetal parts ?

You can flatten certain parts made solely in the part environment..

But this part (as shown in the above image) doesn't fit into those limitations and cannot be flattened as the material is required to deform in multiple directions.

RE: Sheetmetal question: pressed sheetmetal parts ?

(OP)
@rollupswx, your're tone is very unpleasant and very commanding, why?

Regardless, thank you all kindly!

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close