Flow Forming

	Flowforming is a chip-less, high technology metal-forming technique for the production of seamless tubular components.
	It is a technique of streching material from a blank or preforms where the material rotated, and is stressed in a particular zone, above the yield point so that it can flow in an axial direction. This pressure is applied by three steel flowforming rollers, where the material flows over a sized mandrel to the final required dimensions, in one or more passes. In general all metals can be flowformed, provided that they are homogenous and fine-grained.
	Advantages of Flowforming: Short lead times Design freedom Low tooling costs Improved Part Quality High Diameter to length ratio
Fig. 4 Forward flow forming with cylindrical pre-form a mandrel (spinning former), b finished component shape, c starting shape (cylindrical pre-form). d rollers, e clamping disc, f ejector disc, x_f direction of flow, x_v direction of roller feed	Good surface finish and high dimensional accuracy Consistant and increased mechnaical properties Optimum grain flow resulting in refined grain size Econimical unit prices - even on medium and small batches Wide choice of usable materials including hardened materials