Although there are other discussions but couldn't apply the resolution on my model (attached). How do I turn this helical profile into a flattened sheetmetal.
Look here for the correct answer
How do I change this helix sweep into sheetmetal?
how should this work?
You'll be able to flatten just one winding - because the other will overlap.
Find a sample sheet metal part from 2011 attached...
Thanks for your solution but in this case I need to flatten the full length of the helix
What do you think - how could this be fabricated?
The same way you fabricate any helical spring.
I'm no swx sheetmetal pro but I'm pretty sure you can't flatten / unroll a helix shape. You can however measure the arc length, and then make a model of your strip based on that, but that won't of course take into account the bending axis i.e. the arc length might not be the actual length you need.
Ashistaru Dey wrote: Thanks for your solution but in this case I need to flatten the full length of the helix
Ashistaru Dey wrote:
If you only need to find out the length, then there is a macro for this task
No need to flat it out just to measure the length
In my opinion this is NOT the correct answer. The big difference is the orientation of the sheet metal surface. In the linked thread it's no problem to get the flat pattern using the same technique if have used in my example from the year 2011. But the part we discuss here has a 90 deg different orientation. And with this said it's hopefully clear, that we can't use the same approach and must/will get an completely different result.
Have a look at the sample i have posted - and it's flat pattern. How could we ever get a flat pattern with more than 1 winding? In the real world these parts are weldment structures where every winding is a separate sm part, welded on a shaft.
If you don't believe me, take a piece of paper and try out for yourself… One of the spiral parts is easy, the other impossible?!
There are tons of companies that take a flat bar and make Helicoil Flighting, I made and designed a lot of Screw Conveyors for the Dry Bulk Material Handling Industry, this is possible.
How accurate is the SW Development, that's up to the Fabricator to check...
This sounds like a school assignment to make people think of different possibilities to do what is physically not reasonable with the material in "normal" fabrication methods.
There is / are other posts recently asking how to cut a spiral in a sheet metal part - seems like that would be step 1 in making an actual part. Step 2 would be stretching the spiral sheet vertically.- however, this would produce a cone shaped spiral. The only way to create an actual sheet metal spiral (as shown) where the sheet metal does not seem to have a twist in the material would be to compress the insides of the material and stretch the outsides, which would be very difficult in the real world unless heated to make it stretch and compress without buckling or breaking or using very soft material.
That being said - to model it, you could create a Helix like you would for a spring (that used round material) and simply use flat stock. It would then be a very long thin piece of sheet metal - similar to what Maha Nadarasa showed in the other post, but with the material on the thin side instead of the wide side of the strip of metal.
Is this a school project / assignment or are you being asked to actually design this to be made in a company you work at?
This actually is a part of a screw conveyor used in material handling and I agree with you @heiko_Sohnholz and @john_Stoltzfus both. Based on requirement there could be different approaches to manufacture these.
Thanks to all you gentlemen for your valuable comments
Technische Federn und Druckfedern Hersteller - Dr. Werner Röhrs GmbH & Co. KG
These springs are "flat wire" springs. They have nothing to do with sheet metal parts. And the flat pattern of a flat wire is a straight wire. A completely different way to fabricate/manufacture these parts...
Is this for a screw conveyor? I think Heiko Sohnholz is right. Each flight will be its own sheet metal part.
Retrieving data ...