American Journal of Mechanical and Materials Engineering
Volume 4, Issue 2, June 2020, Pages: 26-36
Received: May 10, 2020;
Accepted: May 25, 2020;
Published: Jun. 15, 2020
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Oladebeye Dayo Hephzibah, Department of Mechanical Engineering Technology, Federal Polytechnic, Ado-Ekiti, Nigeria
Adejuyigbe Samuel Babatope, Mechatronics Engineering Department, Federal University, Oye-Ekiti, Nigeria
Kareem Biliyaminu, Industrial and Production Engineering Department, Federal University of Technology, Akure, Nigeria
This research work addressed the mechanical and microstructural properties of welded joints. The results show the minimum average hardness values as 133.83, 102.13, 103.42, 95.15, 96.78 and 117.50 for various mini-robot welded mild steel plates of thickness 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm and 1.0 mm, while the maximum average hardness values were as 145.67, 119.08, 113.28, 106.58, 113.42 and 137.75 respectively. Results of the research have shown that the robot welding samples produced are high in hardness. This is responsible for low tensile stress values that may also mean low mini-robot welded sample extension. The robot welding samples developed gave low tensile strain values and this was expected because the robot welding samples developed had high hardness, low extension and low tensile stress. The microstructural study shows that the welded mini-robot samples had more fine structure than coarse (which is more pearlite than ferrite). The built welding robot has also provided a wide range of welding speeds from experimentation, significantly less welding time, wide weld length. The built welding robot has a range of welding time (4.7-32.94s), welding speed starting at 4.41mm / s over the same range of 0.5-1.0 mm thicknesses for the mild steel plate and weld length. The thicker the mild steel plate, the lower the welding time and the higher the welding speed. This is valid when the built welding robot was used. The built welding robot worked very well and the results of Microstructural Analyses presented quality welds.
Oladebeye Dayo Hephzibah,
Adejuyigbe Samuel Babatope,
Metallurgical Analyses of Welding Using a Developed Mini-Robot, American Journal of Mechanical and Materials Engineering.
Vol. 4, No. 2,
2020, pp. 26-36.
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