I am having a little trouble making this part. I need to roll it into a spiral. I can't figure it out can anyone give me a hint. thanks
Is this what you want?
I manually determined the angle of the spiral with a bisection method.
hope this one works
Do you have a picture of the finished piece? Your sketch seems to be contradicting as you call out rolled ends of 23" and 9.5" and you are indicating another roll direction along the 85.5" side. To me you are indicating a roll to a funnel shaped part.
The model previously attached was made with 2009. Roll through the feature tree to get all of the details.
. . .but, to summaryze the process,
first make the spiral, using sketch2, which contains circles defining the ir and or of the scroll. (inner radius, outer radius)
in this case, the pitch of the spiral is calculated as (or-ir)/revs. The revs of the spiral was manually adjusted to get a spiral length of 85.5.
(measure, adjust, rebuild, repeat)
After the spiral is as you like it, make a lofted sheet metal bend:
start a sketch on the same plane as the spiral and convert the spiral to a sketch.
offset a plane, at least the distance of the longer end of the scroll, and put a sketch on it. convert the previous sketch
make a lofted bend between the 2 sketches.
unfold the bend
cut extrude the taper
re-fold the bend
I'm not sure I'm understanding your goal, but maybe lofted bends would be an answer.
As I was modeling this Carly Simon was singing a song in the backyard of my mind - you're so vane - or something like that.
The attached sample only has 5 line segments per sketch. If you want a smoother "spiral", then increase the number of line segments in each sketch. I used arcs as construction geometery in order to define what I interpreted as your design intent.
If you need a flat pattern with bend lines shown for the brake operators, keep the number of line segements identical in both sketches of the loft.
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