Comparative Analysis of Mechanical Properties of Mild Steel Plates Welded with the Developed Welding Robot and Manual Electric Arc Welding

  Oladebeye D. H.,  Adejuyigbe S. B.,  Ayodeji S. P.

Mild 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm and 1.0 mm thick steel plates were prepared into 66 test samples. After welding with the Developed Welding Robot and Electric Arc Welding Machine these test samples were subjected to Tensile Strength and Hardness tests. All data obtained including hardness, tensile stress, tensile strain, break point and elasticity modulus were analyzed and the data produced from Electric Arc welding operations were also compared with those obtained from the Robot welding operations created. The findings showed the difference in hardness values of welded and unwelded mild steel plates (specimens) of different sizes where the highest hardness of the produced robot welding samples is located. The 1.0 mm soft, non-welding steel plate (CONTROL Sample) had the highest effect on load. 0.8 mm Sample gave the highest amount for developed robot welding. Sample 1.0 mm gave the highest for the electric arc welding. The results revealed that the 1.0 mm sample without welding had the highest overall impact on load. The robot welding sample produced gave the lowest tensile stress while the unwelded samples (CONTROL) gave the highest. The unwelded (CONTROL) samples gave the highest tensile strain values while the lowest was provided by developed robot welding samples. The robot welding samples developed gave a trend of comparatively lower elasticity modulus values than both the unwelded and the electric arc welding samples. This pattern was anticipated given the higher hardness values, lower extension values, tensile stress and tensile strain of the robot welding samples formed over those of the electric arc welding and unwelded (CONTROL) samples.

Keywords- Mechanical properties, mild steel, welding mini-robot, manual electric arc welding

Unique Identification Number - IJEDR2002050
Page Number(s) - 289-302
Pubished in - Volume 8 | Issue 2 | April 2020
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Oladebeye D. H.,  Adejuyigbe S. B.,  Ayodeji S. P.,   "Comparative Analysis of Mechanical Properties of Mild Steel Plates Welded with the Developed Welding Robot and Manual Electric Arc Welding", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.8, Issue 2, pp.289-302, April 2020, Available at :http://www.ijedr.org/papers/IJEDR2002050.pdf