Effect of Welding Speed and Groove Angle of Butt Weldjoint using Tig Welding

 

N. Praveen.¹, J. Manoj Kumar.²

¹M-Tech Student, Department of Mechanical Engineering, S R Engineering College, Warangal, Telangana. India.

²Assistant Professor, Department of Mechanical Engineering, S R Engineering College, Warangal, Telangana. India.

 

ABSTRACT:

Welding is the metal bonding process in which two or more metals with the same or different materials can be joined by heating to a plastic state. It is mainly used for metals in the process industry, in the manufacture, maintenance, repair of parts and constructions. The metal plates and pipes used in the process industry and have the welding power as their important parameter. In this paper, the welding speed and geometry will be performed to detect tensile strength and impact resistance at main joints. For the V-track geometry, various platform models with different angles from 350, 450, 500 can be manufactured from steel construction (A633 Grade E). At present, the various welding speeds are used in precision welding applications, such as nuclear reactor pressure vessels, boilers, etc., where the precision and quality of welding is an important parameter. Therefore, the experiment will be carried out at different welding speeds such as 0.4 cm / s, 0.8 cm / sec and 1.20 cm / sec to prepare a V-bar welding. Generally, the V-groove geometry with included angle is up to 600 in use.

 

 

 

1. INTRODUCTION:

The welding is in its center simply the way to tie metal objects. Considering that there are approaches to applying metallization (riveting, brazing and bonding, for example), attachment has proven to be a selection strategy for electricity, power and flexibility.

 

There are many very special attack methods, and a number of are unrealistic all the time. Some methods use heat to melt generally long metal objects, usually including a "fill steel" in the joint to act as a binder. Possibility methods believe that pressure is linked to metal, and others still use a mixture of all heat and stress. No longer how to bind and fail, no matter which metal device is joined remains unchanged, the attached approach continuously changes the work objects.

 

It may seem like a trivial reason, but it is really important to know how the attachment produces such solid bonds. In welding and brazing procedures, steel portions are joined by inserting a third material (with a reduction melting factor) into the mixture. The fusion of this 0.33 material between the surfaces of the unique parts bonds the parts together. However, the bond is stronger and more practical than becoming a member of the material. Welding again eliminates the intermediary and goes directly with the original parts. The result is a strong and coherent band that is regularly as strong as the fabric itself. The tungsten electrode as well as the welding area are shielded from the including air with the help of method of an inert gas. The electrically powered arc can generate temperature levels of approximately 20,000⁰C and also this heat might be concentrated to thaw as well as become part of various a component of the fabric. The power supply needed to maintain the TIG arc has a sagging or routine modern-day feature which provides a basically gift-day result at the very same time as the arc size is numerous over many millimetres. Therefore, the all-natural variants inside the arc period which stand in overview welding have little influence on welding cutting-edge. The ability to limitation the contemporary to the established rate is additional important also as the electrode is brief-circuited to the job item, in any type of various other situation, exceedingly too much modern will certainly go with the circulation, destructive the electrode. Open up circuit voltage of stamina supply phases from 60 to 80 V.

 

Fig.1.1. Schematic Diagram of TIG Welding System.

 

2. LITERATURE REVIEW:

1. The effect of the welding geometry parameter on the hardness of the sheet metal.:

Welding is a sector where the technical trends are consistent with the trends in the technical base that are generally controlled by the extraordinary industrial demand for the welded structure. Reliability, reproducibility, and vitality needs force technicians to take a look at welding defects that include distortion, hot cracking, systematic, and logical technology instead of experimental ground. Distortion is an unwanted body action from specifications in a fabricated structure due to uneven growth and contraction of the weld metal at some stage of the welding heating and cooling cycle, which means that many factors namely fabric, system welding and the strategies followed make it difficult to accurately anticipate distortion. Grooving, root opening and root surface perspective are used to analyze the hardness of shot-weld joints.

 

2. A summary document on the impact of the welding surface and the track angle of the resistance on the head is welded using TIG welding.:

Welding is the most critical business in any company. It is important to optimize the various parameters of the welding process in order to achieve reliability, productivity and excellence of the products. So industries force engineers to take a look at the parameters of the welding mode, including electrodes, inert fuel, and current voltage and so on. The sector's goal is to produce low-cost quality goods and increased production taxes. The TIG welding system is a versatile system and is normally used to connect materials with heat and / or deformation software or connection material to increase production with much less time and price. The current test is performed to analyze the effect of welding speed, track angle and upper phase on the strength of mechanical housing with tensile control, effect take a look. Also, the current purpose of the study is to investigate the welding speed impact on the HAZ (Heat Affected Zone) hardness and the longitudinal and transverse distortion of the shock welding line. Mechanical controls are performed to detect the mechanical housings in the shock welding line.

 

3. Examine the effects of welding parameters on the mechanical properties of low-piston welded steel.:

In this document, the effect of heat input in metal-chemical houses with low carbon dioxide was studied using welding methods: Oxy-Acetylene Welding (OAW) and Shielded Metal Arc Welding (SMAW). Two special preparations for edges of a certain size, 10 mm thick with low metal carbon content, with the following welding parameters: double welding voltage of 100 V and 220 V, different welding currents at 100, one hundred and twenty and 150 amps and unique light metal electrode meters of 10 and 12 have studied. The tensile force, the hardness and the effect of the welded joint had been made and it was discovered that the tensile force and the hardness decrease with the increase in heat introduced into the weld. However, the effect of the welding effect increases with the increase in incoming heat. Furthermore, it has also been found that the training of the appearance with V-tracks has superior mechanical properties compared to the direct training of the parts in equal situations. The micro structure investigations performed have shown that the cooling charge in specific media has a significant impact on the welding micro structure. Perlite and ferrite have been located within the micro structure, but the proportion of ferrite in perlite varies under different circumstances.

 

4. Optimization of Tig welding parameters using the Taguchi approach: an audit:

The goal of any company is to produce excessive goods at low cost and increase production costs. Welding is the most important operation in all industries. It is important to optimize the various parameters. Modern welding, welding speed, voltage, gasoline goes with the flow rate and so on. From the welding process to achieve reliability, productivity and good goods. The TIG welding technique is a flexible operation and is normally used for the assembly of two substances by means of heat and / or deformation or filling material to increase production with less time and price. The reason for this observation is to describe unique strategies to determine near the most advantageous settings 

 

3. DESIGN AND METHODOLOGY:

TIG (Tungsten inert fuel) welding is the maximum well-known gasoline arc welding approach applied in numerous industries. Other arc welding techniques have terrible fine whilst they may be in comparison to TIG (Tungsten inert gasoline) welding techniques. TIG welding additionally wishes extra accuracy in spatter discount and welding best of the bead. Shielding gasoline in TIG welding is appropriate for the safety of atmospheric conditions. The weld location is blanketed from the atmosphere with the aid of an inert defensive gas (argon or helium), and a filler metallic is normally used. The energy is supplied from the strength deliver (rectifier), via a hand-piece or welding torch and is delivered to a tungsten electrode that is equipped into the hand piece. Materials V-groove geometry high-quality models of the plate with numerous covered angles from 35⁰, 45⁰, 50⁰ will be made from structural metallic (A633 Grade E). Currently, unique welding speeds are such as 0.Four cm/sec, 0. Eight cm/sec and 1.20cm/sec to prepare a V-groove butt weld joint. Effect of approach contemporary on the tensile strength of weld joint can be analysed.

 

Fig.3.1. Welding models.

 

INTRODUCTION TO TAGUCHI TECHNIQUE:

Taguchi defines the quality level of a product because the total loss incurred by the company because a product failed to function as desired when it deviates from the degree of overall objective performance.

·       These are charges associated with negative overall performance, operating prices (such as adjustments for the age of the product) and any additional costs due to the dangerous consequences of the product being used.

·       Taguchi methods

·       Help companies perform quality correction!

·       Quality problems depend on sound in the product or mode

·       Noise is an undesirable effect that increases variability

·       Perform major problem analysis

·       Hire interdisciplinary teams

·       Performs designated experimental analyses

·       Evaluate the experiments with the ANOVA and Signal-to-noise strategies

 

4. EXPERMENTAL RESULTS:

Taguchi defines Quality Level of a product as the Total Loss incurred by means of the society that is because of the failure of the product that to carry out as a preferred one. When it deviates from the brought purpose overall performance levels. This consists of costs related to terrible performance; working fees which adjustments as a Taguchi Methods. It incorporates the small community deviations of the floor from perfectly flat quality (a real plane). The floor texture is one of the vital factors that manipulate friction and switch layer formation throughout sliding.

 

Fig. 4.1. Finished welding components.

 

The tensile take a look at is performed on welded metal joints to find out the very last tensile energy. The values obtained from the tensile test are optimized via the usage of Minitab software program which incorporates designing of Taguchi orthogonal array.

 

 

Fig. 4.1. the experiments and their corresponding S/N ratio values.

 

 

Fig.4.2. Taguchi Orthogonal Array

5. CONCLUSION:

The experiment designed by the Taguchi method meets the desired goal. The fuzzy interference system is used to detect the tensile strength. All possible values were calculated using the program MINITAB 17.0. The analysis of variance (ANOVA) helps to detect the parameter's significance for each parameter. The optimal value was expected using the MINITAB-17 software.

 

The welding parameters are the welding speed and the track angle for the TIG welding of the steel piece. In this work, the optimum welding speed parameters are 0.4 cm / s, 0.8 cm / s and 1.2 cm / s, track angle 35.45 and 50 degrees. Experimental work is performed in view of the above parameters. Final tensile strength validated experimentally.

 

The experimental results confirmed the validity of the Taguchi method used to improve the welding surface and optimize the welding parameters in TIG welding at a welding speed of 1.2 cm / s and track angle 35

 

REFERENCES:

1.        N.S. Rajkumar, Srihari, “A observe of effect of groove attitude on angular distortion& effect electricity in butt weld”, International convention on mechanical engineering, December,2001.

2.        N. Ren, M. Zan, “Constructing impact of weld & heat affected place on deformation behavior of welded tubes in numerical control bending method”, Journal on material processing technology (2012)

3.        Rossi, E. Boniface, “Welding engineering”, Mc GrowHill Book organization New York,2012.

4.        I. Sattari-Far, M.R Farahani, “Effect on weld groove form& pass huge variety on residual stresses in butt weld pipes”, International Journal of pressure vessel & piping (2009)

5.        D.Akbari, I. Sattari-Far, “Effect of welding warmness enter on residual stresses in butt weld of numerous pipe joints”, International mag of stress vessel & piping (2009)

6.        T. H. Hyde, J. A. Williams, A. A. Becker, W. Sun, “An evaluation of the finite detail assessment of repaired welds underneath creep situations”, Review of FE analysis of repaired welds OMMI (Vol. 2, Issue 2) Aug. 20.

7.        Shanping Lu, Hidetoshi Fujii, Kiyoshi Nogia Arc ignitability, bead safety and weld form versions for He–Ar–O2 shielded GTA welding on SUS304 stainless-steel. Journal of substances processing technology 209 (2009), P 1231–1239.

 

 

Received on 10.06.2019            Accepted on 21.06.2019      ©A&V Publications all right reserved Research J. Engineering and Tech. 2019;10(3):151-155. DOI: 10.5958/2321-581X.2019.00026.6