Experimental study on parameters of technology and forming in three rollers cross-rolling

Three rollers cross-rolling technology has been applied to the production of automobile half-axle casing, because that the workpiece quality is influenced by the forming parameters which are selected reasonably to improve the workpiece quality.The forming angle of forming roller is the key parameter to influence the technology in three rollers cross-rolling,which is close connected to deformation resistance、pushing force and wall thickness increment.Corresponding relationship between roller forming angle and the parameters has been acquired by examination and Pn-β 、P-β 、ΔH-β curve relationship is confirmed in order to give the instruction on reasonably choosing the parameters in controlling the workpiece quality.In addition,the reason that the workpiece of three rollers cross-rolling having instability in the course of shrinking has been analyzed in this paper.Avoiding these reasons will improve the workpiece quality effectively.