1988 Volume 74 Issue 10 Pages 1978-1985
The purpose of this study is to obtain a better understanding of the possibility of using the newly developed simulation testing machine by the author in order to evaluate the lubricity and the anti-seizure property of lubricant in cold sheet rolling. The friction coefficient used for evaluating the lubricity of lubricant is given by,
where T is the back tension, P the rolling load and α the contact angle. It is possible to evaluate the friction coefficient in operation mill by the simulation testing machine, based on the evaluation of the friction coefficients obtained by the different tesing machines.
The surface of the upper roll and the rolled workpiece were inspected after rolling with emulsion oil of tallow. In the simulation tesing machine, the friction pick up could be reproduced. It was confirmed that the friction pick up was the same as that occured in actual mill. The anti-seizure property of lubricant could be simulated from the limitation lines of friction pick up obtained by the simulation testig machine.