It involves slowly pushing a round blunt tool against the surface of a piece of sheet metal suspended in a jig to trace out a 3 dimensional form. Machines 3d sf incremental sheet forming is a sheet forming technology that allows metal parts in complex shapes to be manufactured quickly and simply. Isf incremental sheet forming unlike conventional processes the main advantage of isf is that it does not require investment into costly tools such as dies. 
				
			
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