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FSSW of Polycarbonate Sheets using Conventional Drilling Machine

Author(s):

Mithun George , COLLEGE OF ENGINEERING TRIVANDRUM; Dr. Baiju Sasidharan, COLLEGE OF ENGINEERING TRIVANDRUM

Keywords:

FSSW, Conventional Drilling Machine, UTM

Abstract

Friction stir spot welds are made by applying pressure using a rotating tool onto the top surface of two sheets that overlap each other to create a lap joint. Due to the frictional heat and the high pressure created by the rotating tool, it plasticize the workpiece material. This paper discuss on the friction stir spot welding of polycarbonate sheets of 3mm thickness, using a conventional drilling machine with process parameters as dwell time, waiting time and tool rotational speed. A stainless steel tool of shoulder diameter 20mm, pin diameter 5mm and pin length 4mm is used to make these FSSW joints. By varying these parameters using a 3x3 full factorial design, a total of 27 lap joints by FSSW of polycarbonate sheets have been made. Studies have been conducted to evaluate the influence of process parameters on the shear strength of FSSW lap joints. Optimal process parameters for maximum shear strength are found out from shear strength test. Optimization of process parameters using Taguchi method and grey relational analysis are also done. It is seen that the shear strength of the FSSW joint obtained with the optimal process parameters are found to near the tensile strength of the polycarbonate sheet.

Other Details

Paper ID: IJSRDV7I31164
Published in: Volume : 7, Issue : 3
Publication Date: 01/06/2019
Page(s): 1718-1722

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