Modeling And Optimization The Effects Of Process Variables On Mechanical Properties Of AL-6061 T6 Robotic CO2 Weldments

Sean , John Mathew (2013) Modeling And Optimization The Effects Of Process Variables On Mechanical Properties Of AL-6061 T6 Robotic CO2 Weldments. Project Report. UTeM, Melaka. (Submitted)

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Abstract

Welding of Aluminium structures that uses T6-6061 is a complex and challenging process due to the difficulties in finding the optimum weld process control parameters for achieving the desirable mechanical properties such as hardness and strength of the weldment. The optimum parameters selection which generally is based on the skill and knowledge of the technicians involved and the time and cost consuming number of trial and error runs. An attempt was hence made to systematically investigate the influence of process control parameters on the hardness of the bead of Aluminum 6061-T6 by applying Response Surface Methodology (RSM) technique with five level four-factor central composite design to represent the correlation between the weld process factors and their response. Mathematical models were developed to show the relationship between process variables and their responses that will help the plant engineers to select and control process variables effectively, to achieve the desired results. It has been found that Voltage and Current have the highest effect on the hardness of the weldment.

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