Composite Cemented Carbide Roll Regrinding & Maintenance

1.Composite cemented carbide roll regrinding

To achieve the rated life (roll tonnage), the correct grinding of cemented carbide roll is very important. In order to reduce, avoid the phenomenon of the cracks caused by the roll grooves of the broken roller, all crack completely worn away before the roll center is very important. Need to pay special attention to the problem of the micro hot cracking on the surface of the rolling groove must be completely worn away. Otherwise, when the rolls to re-start a new round roll with a residual crack, the danger of the broken roller will greatly increase.

Composite Cemented Carbide Roll Regrinding and Maintenance

2.Composite cemented carbide roll care and maintenance

It should establish more stringent, more comprehensive management system about composite cemented carbide roll than the cast iron rolls. On this basis, should note the following:
(1) Composite cemented carbide roll operation should be gently, to prevent the roll ring caused by the collision and impact.
(2)Should be taken annular cooling water pipes, a sufficient amount of cooling water required to provide effective cooling. Non-anhydrous rolling and non-rolling midway without water, without water rolling roll ring temperature higher water supply, will result in a broken roll.
(3) Among the roll, it should be noted that the roll groove anomalies observed in the mill intermittent time, the measured temperature is too high, and observe whether there are other anomalies.
(4)Slot roll tonnage can not be over than under the tonnage, or the surface micro-cracks will cause the roll crack, even if it does not crack will cause the roller ring grinding capacity increase, not economic.
(5) Should be of good quality material roll barrel, in order to ensure the strength of the roll. Often roll neck bearings and other key parts to be checked to avoid roll ring failure caused the accident.
(6) Departments and personnel related to the application of the composite cemented carbide roll respective system should be developed and enforced to help improve the overall management level, generate more economic and social benefits.

3.Composite Cemented carbide roll lifting maintenance requirements
(1) Metalworking shop lathes and lathe under composite cemented carbide roll, lifting slower placed to light.
(2) Rolling workshop in the process of assembly, disassembly, and non-hard object impact roll.
(3) Roll and from the lifting of the metalworking and hot rolling plant, only one of a crane, shall not be a hanging two, in order to avoid collision damage.
(4) Such as the specification roll temporarily rolling, roll placed not be stacked, should be stored in a dedicated roller shelves. Inspection and maintenance of bearings block.
(5) Roll in the metalworking shop to be processed and rolling shop to be assembled, shall not be placed on the ground but placed in a special wooden mat.

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