Journal of Mechanical Robotics

Welding is a basic manufacturing process for making components or assemblies. Research on welding of materials like steel is still critical and ongoing. Welding input parameters play a very significant role in determining the quality of a weld joint. The gas metal arc welding parameters are the most important factors affecting the quality, productivity and cost of welding in many industrial operations. The aim of this study is to investigate the optimization process parameters for metal inert gas welding for 6mm mild steel plate work piece using Taguchi method to formulate the statistical experimental design using semi-automatic welding machine. Experimental study was conducted at Bishoftu Automotive Engineering Industry, Bishoftu, Ethiopia. This paper presents the influence of three welding parameters (control factors) like welding current (Amp.), wire speed/feed rate (mm/min.), and shielding carbon dioxide gas pressure flow rate (lit./min.) with two different levels for variability in the welding strength. The objective function have been chosen in relation to parameters of metal inert gas welding i.e. final welding quality (better, medium and bad) and minimum number of defects in final products. Eight experimental runs based on an L8 orthogonal array Taguchi method were performed. An orthogonal array, signal-to-noise ratio and analysis of variance are employed to investigate the welding characteristics of mild steel plate and used in order to obtain optimum levels for every input parameter at 95% confidence level. The optimal parameters setting was found is arc strength (A2), wire speed (B1), and gas pressure flow rate (CO2) within the constraints of the production process. Finally the twelve conformations welding tests have been carried out to compare the predicated values with the experimental values confirm its effectiveness in the analysis of weld quality in final products. It is found that welding wire speed has major influence on quality of welded joints. Experimental result for optimum setting gave better quality welding condition than preliminary setting. This study is valuable for different material and thickness variation of welding plate for Ethiopian industries.

2013

In this paper, robotic gas metal arc welding (GMAW) of welded low carbon steel plate using butt-joint was studied. The distribution of the residual stresses in weld joint of optimization and non-optimum welding parameter such as welding current and speed was investigated by finite element method using ANSYS software. This analysis includes a finite element model for the thermal and mechanical welding simulation. The welding simulation was considered as a sequential coupled thermo-mechanical analysis and the element birth and death technique was employed for the simulation of filler metal deposition. The residual stress distribution and magnitude in the axial direction was obtained. The results shown that the optimum welding parameter able to lower the temperature and residual stress of the weld center area compare to non-optimum parameters around 8 percent for temperature and 1.5 percent for residual stress.

2021

TIG welding is an arc welding process that uses a non-consumable tungsten electrode for the weld and is adopted in some industries as a replacement of gas and manual metal arc welding. This is attributed to the fact that it uses inert gas shield to protect the weld pool. They are specifically preferred for joining magnesium and aluminum. TIG welding technique is of high demand for its robustness and ability to deliver quality welding of thin sheet materials or for controlled penetration for pipe welds in the industrial sectors. This chapter on TIG welding starts with the introduction to the concepts and covers the appropriate materials, applications, TIG weld machine description, and inferences from significant research reports. The last section of the chapter covers the design aspects involved in this process with the help of process parametric behaviors, sample design data, and calculations following various approaches for selection of parametric ranges.

International Journal of Scientific Research in Science, Engineering and Technology, 2020

Welding is widely used by manufacturing engineers and production personnel to quickly and effectively set up manufacturing processes for new products. The MIG welding parameters are the most important factors affecting the quality, productivity and cost of welding. This paper presents the influence of welding parameters like welding current, welding voltage, Gas flow rate, wire feed rate, etc. on weld strength, ultimate tensile strength, and hardness of weld joint, weld pool geometry of various metal material during welding. By using DOE method, the parameters can be optimize and having the best parameters combination for target quality. The analysis from DOE method can give the significance of the parameters as it give effect to change of the quality and strength of product.

THE 4TH BIOMEDICAL ENGINEERING’S RECENT PROGRESS IN BIOMATERIALS, DRUGS DEVELOPMENT, HEALTH, AND MEDICAL DEVICES: Proceedings of the International Symposium of Biomedical Engineering (ISBE) 2019

Using advantages properties of metals to gate an advantages product as objective in manufacturing industries. Dissimilar welding is a height light research issues. Thermal properties of every metal were difference. It is still as problem in the welding process. This study discussed dissimilar welding join between SS 304 and ST37 steel with wire steel as filler welded by Metal Inert Gas (MIG). Dissimilar welding joint could be produce with MIG weld technology however some weld parameters fail because of growing holes in weld pool. Failure weld joints used some welding parameters combination such as welding current 1.5 ampere with 27.5 m/mint, welding current 2 ampere with 25 m/mint, and 2.5 ampere with 27.5 m/mint. The highest peaks load of tensile tested could be achieved around 2.9 kN with welding parameter combination 2.5 ampere with 22.5 m/mint of wire speed. The lowest peaks load could be joined with welding current 2 Ampere and 22.5 m/mint. Fractures on dissimilar weld joint was on ST37 steel side, and 1 specimen a weld joint fracture on weld pool when welded used 1.5 Ampere and 22.5 m/mint as specimen 7 a.

International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2023

Austenitic stainless steel is widely used materials in the current industrial area including higher and lower temperature applications such as storage tanks, pressure cups, furnace equipment etc. Using ratio of those materials are increasing constantly due to having superior corrosion resistance and mechanical properties, GTAW process are widely used for stainless steel welding, especially for full penetration welds in thin gage materials. Selection of shielding gas and filler material is crucial parameter for the quality, the micro structure and properties of weldments. The weldment properties strongly depended on the shielding gas, since it dominates the mode of metal transfer. Shielding gas not only affects the properties of weld but also determines weldability, the appearance, the shape and penetration of bead as well. Pure argon is mainly used for GTAW as shielding gas at present. The most common shielding gases are argon riches mixtures, such as argon with a few percent helium, carbon dioxide, hydrogen, oxygen, nitrogen for GTAW process. In this project we will be made many attempts for made test pieces(SS410) to predict the process parameter of MIG for getting maximum weldment, best mechanical properties and min HAZ. The planned experiments are conducted in the MIG are welding machine; the test piece examination is carried out by following process I.

Materials Today: Proceedings, 2018

This research article exhibits experimental and numerical results of TIG welding of AA6061. TIG welding process parameters like gas flow rate, welding current and welding speed was optimized using the Taguchi technique for joining AA6061 plates. The combinations of parameters were carefully selected with the objective of producing weld joint with maximum impact strength. Experimental tests were performed with four levels of parameters according to L 16 orthogonal array. Signal-to-noise (SN) ratio and ANOVA were used to evaluate the experimental results. The results indicate that the gas flow rate is the significant parameter on impact strength of weld joints, followed by welding speed and welding current.

Journal of Mechanical Engineering Research, 2013

Cladding is a surface modification process in which a specially designed alloy is surface welded in order to enhance corrosion resistant properties. Common cladding techniques include Gas Tungsten Arc Welding (GTAW), submerged arc welding (SAW) and gas metal arc welding (GMAW). Because of high reliability, easiness in operation, high penetration good surface finish and high productivity gas metal arc welding became a natural choice for fabrication industries. This paper presents central composite rotatable design with full replication techniques to predict four critical dimensions of bead geometry. The second order regression method was developed to study the correlations. The developed models have been checked for adequacy and significance. The main and interaction effects of process variables and bead geometry were presented in graphical form. Using fmincon function the process parameters were optimized.

Proceedings, 2018

The present article describes an experimental analysis of a robotized Gas Metal-arc Welding (GMAW) in aluminum alloy, using Metal Inert Gas (MIG) in its transfer method variation Standard and pulsed Cold Metal Transfer (CMT+P), developed in order to optimize the penetration depth, width and reinforcement of the weld bead. The base metal was the aluminum alloy 6082-T6 and the filler metal was aluminum alloy 5754.

2018

In the present work an attempt has been made to optimize the process parameters of metal inert gas welding for aluminum pipes 6061 to evaluate the output quality characteristics using factorial design. An interaction effect of input parameters is also studied to predict their influence on the output response. The performance of MIG for aluminum pipe is evaluated in terms of joint’s tensile strength and corrosion rate , factorial design technique has been employed using orthogonal array, ANOVA (analysis of variance) to study contribution of each parameter and interaction of them on output and confirmation tests at 95 % confidence level to compare with experimental results. Optimal combination of parameters is presented with a good agreement found between the estimated and experimental results within the preferred significant level after verifying experimentally. It was confirmed that factorial design with ANOVA and confirmation tests successfully improved the quality characteristics ...