DESIGN OF THE RELIABILITY OF SCREWDOWN DEVICES OF PILGER MILLS

The pilger mills in our plant were introduced from abroad in 1950s. Some critical problems occurred to the screwdown devices and drives of the mills during more than 20 years' operation with the outputs, steel grades and specifications gradually increased and expanded. Reliable strength and steadiness of the screwdown devices are calculated with the probabilistic-statistic theory to provide references for the application, modification of the mills and also for designs of the same units.