Experimental Investigation of Three-Roller Bending Operation for Multi-Pass Cylindrical Forming of Plates

Abstract

Roller bending is a sequential process where bending operation is done in single or multiple passes. Producing cylinders in single pass is most economical and efficient method, but accuracy in final dimensions depends upon experience and expertise of operator. In small scale industries, bending operation has been performed in a very non-symmetrical manner and hence keeping accuracy in final dimensions is utmost concern. For getting accuracy in final desired shape of the component, utilization of multiple pass bending is generally recommended in many industries. Predicting accurate number of passes required to complete cylindrical bending needs to be evaluated. Considering this objective, the author proposed a methodology, in this paper, for accurate prediction of number of passes for forming cylindrical bending on three roller bending machine. An emerging combination of dimensional analysis and modern design of experimentation techniques is presented. The model consists of geometrical, operational, and material parameters. Effect of each parameter on dependent variable is also discussed. Obtained model results are compared with experimental results to validate the model. Average RMSE is found to be less than 10 %, showing correctness of applied methodology.