What method to roll bend these two lines?

Rhino Rhino for Windows
1

Hi,
two tapering lines represent the unrolled innermost edge of an aluminium arm. The upper portion of this shape however is in reality bent over on a radius of 70mm.

I need to take the two upper lines which I have split from their remainder and roll bend them through 90 degrees, as if in a vice being bashed around the cylinder.
Projecting them downwards (after leaning them forward so their ends were at cylinder top ) onto the cylinder didnt work., they dont depart the uprights as tangent !
roll bend through 90deg.3dm (53.2 KB)

Steve

2

Hi Steve - make a line and an arc. (Cyan and White) Flow from one to the other.

image
image.png789×894 10.4 KB

-Pascal

3

Fantastic, and there was I considering cage bend, flowOntoSurface.
Never used flow before.
secret is to remember every command and what it does in the grey cells, not easy !

Steve