Several rolling process introduction asynchronous rolling

Asynchronous rolling is a speed inequality rolling, the upper and lower work roll surface linear speed is not equal to reduce the rolling force; therefore, also known as differential rolling, also known as rolling. Asynchronous rolling is used for rolling bimetallic plates, will cause bending changes in the rolled parts, asynchronous rolling can be adjusted to the bending curvature of the bimetallic plate, and in the same asynchronous ratio of the conditions of the two metal group elements of the thicker than in a certain degree of deformation under the conditions of the rolled parts can be obtained flat. Asynchronous rolling is a new rolling process with many advantages. The use of asynchronous rolling can greatly reduce the rolling force, so the equipment weight is light, low energy consumption, mill deformation is small, high product accuracy; reduce the wear and tear of the rolls and intermediate annealing, reducing the production costs; rolling passes less, high productivity; mill can be rolled thickness. Asynchronous rolling is not only applicable to cold rolled sheet and strip, and can be used for hot rolled sheet, etc., is a very promising development of the production process. Asynchronous rolling shortcomings are mainly prone to cause mill tremor.


Accumulated stacked welding
Accumulative roll bonding (accumulative roll bonding, ARB) is the surface degreasing, work hardening and other treatments after the size of two pieces of sheet material at a certain temperature stacked roll and make it automatically welded together, and then repeat the same process repeatedly stacked, rolled and welded, so as to make the organization of the material to be refined, the inclusions are evenly distributed, greatly improving the material’s Mechanical properties.
Double-drive rolling
Double-drive rolling is commonly used in ring processing, its basic working principle and conventional ring rolling is basically similar, the difference is that the double-drive rolling process on the core roll loaded with a driving torque, so that the core roll of the rotation by the follower rotation into an autonomous drive control rotation. Ring dual-drive rolling equipment is based on the conventional ring rolling equipment will be the core roll components into a core roll with hydraulic drive rotation, to achieve the core roll independent movement. Under the rotating action of the drive roll and the core roll, the ring piece continuously enters the rolled hole pattern composed of the drive roll and the core roll. As the core roll autonomous operation and not with the ring operation, in the roll and ring surface friction under the action of the surface of the ring, the ring inside and outside the surface of the material rotational speed does not match, as if the ring inside and outside the surface of the material rubbing, increasing the amount of plastic deformation of the ring organization makes the ring to produce a continuous local plastic deformation. Wall thickness reduction, diameter expansion, cross-section profile forming at the same time, the ring internal organization due to larger plastic deformation and improve the organizational properties of the parts. Ring by repeated multi-rotation rolling so that the diameter reaches a predetermined value, the outer surface of the ring and the signal roll contact, the drive roller to stop the feed movement, the ring dual-drive rolling process ends. During the rolling process, the guiding movement of the guide roll ensures the smooth rotation of the ring.

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