Design modification in hydraulic puller for increased efficiency for dismounting TTC coupling

Abstract

Central machine shop (CMS) is an integral part of engineering shops &foundry (ES&F) department where the entire repair works of the components is carried out and spare parts are produced. One such repair work is removal of damaged shafts and replacing with new ones. The project is concerned with designing integrated mechanism to remove the mountings on the twin table car (TTC) driver axle shaft. Twin table car is used to transport blooms from continuous casting department to bloom storage yard. If any damage caused to twin table car the entire production in the department gets hampered. The mountings on TTC drive axle shaft include gear box, coupling and bearing housing. It is very difficult to remove gear box from the complete assembly, so they cut the shaft into two portions, one portion contains only gear box from which it can be easily removed and the other portion of the shaft has coupling and bearing housing. From this remaining portion coupling and bearing housing are separated to replace a new shaft. The general practice carried out for their removal in central machine shop (CMS) is this assembly is carried to the hydraulic press with the help of a crane where the shaft is removed. It is a time-consuming process and involves more man power. The design of a portable mechanism is carried out i.e. hydraulic puller so that it can be carried to the place where there is drive axle assembly. This is a quicker process and involves less man power.