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Analysis of metal flow behavior and residual stress formation of complex functional profiles in high speed cold rolling

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Document pages: 10 pages

Abstract: In order to obtain good surface properties of complex functional profiles in high-speed cold rolling, the formation mechanism of metal plastic flow and residual stress was analyzed by using the theoretical model of metal flow and residual stress. The cold rolling process of spline shaft is simulated and analyzed by using simulation software. The flow of metal and the formation of residual stress during movement are studied. In the actual test, the change of particles in the spline profile section and the distribution of residual stress on the profile are studied. The micro corresponding relationship between metal plastic flow and residual stress is established. The conclusion shows thatate at which the metal flow decreases changes gradually at different metal layers. The residual stress value is directly related to the plastic flow difference. As the roll-beating speed increases, the uneven degree of plastic deformation at the workpiece surface increases, and the residual stress in the tooth profile is generally greater. At the same roll-beating speed, the rate change trend of the metal flow decreases gradually from the surface to the inner layer and from the dedendum to the addendum. The residual stress distribution on the surface of the tooth profile decreases from the dedendum to the addendum. These findings provide a basis and guidance for the controlled use of residual stress, obtaining better surface layer quality in the high-speed cold roll-beating process of the complex functional profile.

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