ABSTRACT: In the Dual roller bending machine, the both rollers rotate. Bending can be done in sheet metal For designing a two stage roller bending machine, it is required to calculate the exact force for bending. Based on this force, the machine parameters and motor power are decided. Various factors that should be considered while calculating this force are material properties, width, and thickness, number of passes, bending radius, force developing mechanism and link. To analyses the force and power for motor the designer takes the help of analysis software. The cost of software for analysis is high. So there is requirement to find simple formula. In this paper the various theories regarding bending are reviewed, formulae for force and power calculation are collected and finally a case study is taken where we have put together all the results of these formulae.This machine works on simple kinematic system instead of complicated design. This machine can bend up-to 8 mm thick sheet and up-to 2cm diameter of pipe. Bending machine is a common machine in machine shop that is used to bend a metal. Thereare 3 roller used in bending machine. The common product of metal bending machine are pipe (square and circular) bending if separate attachment of die is provided, sheet bending. During the roll bending process the sheet or plate or pipe is passed through consecutive rollers that gradually apply pressure on pipe. Because of this pressure the change in radius of pipe or sheet occur.

| DOI: 10.17148/IJIREEICE.2022.10509