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Stress measurement in the steel rolling mill

By P Rajanna, Bhaskara P Rao, VSV Mani, Chinmayee Madhavan, IP Venkataramanappa, C Jayachandran and KN Chandrashekhar


Imported Straight Bevel Gear originally fitted in the13; Merchant-Mill was replaced by indigenously made straight bevel gear in Steel Rolling Mill at TISCO, Jamshedpur. The replaced gears were developing crack originating at the fillet region extending towards the centre with in a short period of two to three months operation,causing large production loss. It was suspected that certain unpredicted peak loads exceeding designed limits might be present during Mill operation. To make a quantitative assesment of the peak load, the measurement of tooth load and torque in the driving axle was undertaken. For this purpose, a six channel FM-FM telemetry system was developed at N A L for measuring gear stresses using foil strain gauges.In the Strip Rolling Mill, the thickness of the sheet was depending on the roller load. A load monitoring system consisting of two load cells of 100 tonnes range each and a digital load indicator was developed at N A L for monitoring the roller bearing load for better thickness control

Topics: Electronics and Electrical Engineering, Mechanical Engineering
Publisher: National Aeronautical Laboratory
Year: 1987
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