Double central rack stringer for 1 2/4 winding staircase

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1

Hello

Attached is a SW 2020 file to show you 1 of the 2 stringers for the staircase mentioned in the question.

I imported in SW 1 DXF a solid representing the entire sheet of this stringer with the removal of material from each step, then I sketched in 3D quickly the rack stringer

that I would like to have unfolded, am I clear?

What functions would sw 2020 be able to do this with?

Thank you in advance

Sincerely, Pierre


tole_limon_cremaillere_2.sldprt
2

Attached is a not very precise 3D sketch of this stringer

if it helps!!


limon_cremaillere.sldprt
3

Hello @pierre32.debate,

It seems to me that the easiest way is to reconstruct the part using the sheet metal functions that allow you to bend, unfold, remove material from the unfolded sheet metal...

- First step: create a sketch of the middle section of the sheet metal constituting the stringer, in the lower plane of the staircase, based on the geometry from the dxf (which is not very rigorous from a geometric point of view).
- Second step: duplicate this sketch in the upper plane of the staircase, then use the Transition Fold sheet metal function to generate the envelope volume of the stringer.
- Third step: unfold the sheet and create a 2D sketch of the developed shape of the stringer in the plane of this flat sheet. It takes about twenty dimensions and a few sketch relationships to best respect the 3D sketch provided in the initial model.
- Fourth step: use the sheet metal function Extruded material removal, through the entire sheet, to delimit the stringer.
- Step five: fold the sheet metal for a 3D visualization of the stringer.

The only use of the extruded surface at the beginning of the construction shaft is to visualize the silt envelope.

The geometric model is attached (SW 2020).

Kind regards.


tole_limon_cremaillere_2020.sldprt
3 Likes
4

Many thanks to m.blt

I'm going to explore your file... the tree of creation!!

Sincerely, Pierre

5

As much for me, I clicked on the heart, which I now see is a mistake on my part since it is the opposite I wanted, in short!! mea culpa!!!

6

Yes I recognize that the geometry of the attached files is not rigorous, following the Boolean operations undergone the number of segments in the arcs change.... ARC+2005 and its imprecision!! but very intuitive as a software.

SW to the rescue, fortunately!!

I agree

7

a rendering

Thank you again!!


limon_cremaillere_double.jpg