From your room; make a 3D sketch of the inside of the spiral and then close it, then do the same for the outer spiral of the same part (high or low for both sketches) and then use the delete body function. Once the body is deleted, select in the creation tree the two 3D sketches by doing CTRL and also select transition fold and there you will only have to choose the sheet metal parameters and it should have been good vis-angrais-d200-d48-l110_bis_0.sldprt (413.3 Kb)