The chipless forming spinning technology uses the metal round blank, tube blank or preprocessed material to spin. The forming rollers
extrude the metal material then causing the flow age of the metal material. This technology helps to obtain ducted objects of the complex
curvilinear generatrix, minor deviation tolerance range and superior surface quality. The spinning technology well determines the thickness
and outline of work pieces to the maximum extent, and could also repeat the thickness and outline accurately.