| Bearing Cages, as the product assembled, is required high exactness, whose size in the inner diameter is up to IT11.These product should be produced by ironing. The rule of process is analyzed roundly by simple ironing of bearing cages in this thesis, and the parameter which influences the process is studied.The strains and stress of every part is analyzed on product. In terms of mechanical characteristic of ironing process and forming field built, the ultimate forming is found out. The angle of mould is analyzed by upper limit method and is validated practically. The characteristic and advantage is expatiated. The diversified study method is compared and the excellent is applied to this study. The FEM and software are adopted to simulate material process and optimize them, so that producing can be carry out on crank press, which lead productivity advanced. The anisotropy appearing in production is studied and analyzed the harm. The reason leading to this is found out theoretically and method solving this is discovered in material. Because the product need high precision, so the difference between size designed and practical that render mould wearing out early because of springback. The FE simulation is carried out to testify the reason leading to springback by basal theory. The universal formula of compensation for springback are presented and provided bases for the working part of mould size design, which means that the precision of product in size gets more accurate and the life of die gets longer. The lubricative process is analyzed in theory and practice, and the rational lubricative process is discovered.
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