scholarly journals A Novel Method of Defect Detection Based on Experimental Investigation of Galvanized Steel Welded Plates Using Wobble Laser Process

2021 ◽  
Author(s):  
Sasan Sattarpanah Karganroudi ◽  
Ahmad Aminzadeh ◽  
Vincent Blériot Feujofack Kemda ◽  
Noureddine Barka
Keyword(s):  
Process Parameters ◽  
Predictive Models ◽  
Welding Process ◽  
Galvanized Steel ◽  
Welding Parameters ◽  
Indentation Hardness ◽  
Hardness Profile ◽  
Weld Width ◽  
Welding Defects ◽  
Geometrical Defects

Abstract This paper aims at investigating the effect of laser welding parameters on the hardness profile, using hardness mapping analyses, and welding geometry of galvanized steel plates. Hardness distribution and geometry deflection of galvanized welded thin plates are commonly applied in fields where the weld quality is of utmost importance. Due to the welding process and material condition, welding galvanized steel is one of the problematic matters in welding technology. Here, the design of experiment (DOE) approach is used to study the effect of process parameters. Using a pattern matrix of micro-indentation hardness experiment, the welding defects are visualized on hardness profile of the weld cross-section. The effect of process parameters on welding defect formation is then qualitatively analyzed. The geometrical defects of welding such as weld width and voids are then quantitatively studied based on analysis of variance (ANOVA), and predictive models of welding voids and weld seam width are developed based on the regression method. Response surface method (RSM) is then applied to define the trend of process factors interaction on the welding defects. The experimental results confirm the reliability of developed predictive models of welding defects geometry, weld width, and voids area of laser-welded galvanized plates.

Comparison between Modelled Influence of GMAW Parameters and Corresponding Mechanical Properties of Group 1 and 2 According to ISO/TR 15608 Steel T Joints

2021 ◽  
Vol 890 ◽  
pp. 17-24
Author(s):  
Aurel Valentin Bîrdeanu ◽  
Alin Constantin Murariu ◽  
Horia Florin Daşcău ◽  
Iuliana Duma
Keyword(s):  
Process Parameters ◽  
High Performance ◽  
Hsla Steel ◽  
Welding Process ◽  
High Strength ◽  
Industrial Applications ◽  
Steel Plates ◽  
Experimental Program ◽  
Welding Parameters ◽  
T Joints

Reproducibility in respect to welded structures realization is one of the main requirements for a wide variety of industrial applications. One of the international tendencies regarding the use of the steel is the replacing, in critical areas, of structural steels with high performance steel, e.g. with HSLA steels. The paper presents the results of a factorial designed experimental program focused on determining mathematical correlations between the GMAW process parameters for T joints of 4mm thick steel plates of structural (S235JR+AR according to SR EN 10025-2) and hot-rolled, high-strength low-alloy (HSLA) steel plates (S420MC according to EN 10025-4), respectively. A comparison between the obtained mathematical correlations that connect the welding parameters and the main mechanical characteristics is presented. The correlations can be used for applying the optimal combination of welding process parameters for realizing the T-joints of welded products.

Experimental Investigation on Laser Transmission Welding of Polycarbonate and Acrylic

2021 ◽  
pp. 160-180
Author(s):  
Dhiraj Kumar ◽  
Sudipta Paitandi ◽  
Arunanshu Shekhar Kuar ◽  
Dipankar Bose
Keyword(s):  
Mathematical Model ◽  
Process Parameters ◽  
Welding Speed ◽  
Laser Power ◽  
Optimum Parameter ◽  
Optimization Technique ◽  
Welding Process ◽  
Parameter Setting ◽  
Laser Transmission Welding ◽  
Weld Width

This chapter presents the effect of various process parameters, namely laser power, pulse frequency, and welding speed, on the weld shear strength and weld width using a diode laser system. Here, laser transmission welding of transparent polycarbonate and black carbon filled acrylic each of 2.8 mm thickness have been performed to create lap joint by using low power laser. Response surface methodology is applied to develop the mathematical model between the laser welding process parameters and the responses of weld joint. The developed mathematical model is tested for its adequacy using analysis of variance and other adequacy measures. It has been observed that laser power and welding speed are the dominant factor followed by frequency. A confirmation test has also been conducted to validate the experimental results at optimum parameter setting. Results show that weld strength of 34.3173 N/mm and weld width of 2.61547 mm have been achieved at optimum parameter setting using desirability function-based optimization technique.

Optimization for Laser Welding Fillet Joint Based on Response Surface Method

2011 ◽  
Vol 211-212 ◽  
pp. 1110-1114
Author(s):  
Xiao Yun Zhang ◽  
Yan Song Zhang
Keyword(s):  
Laser Welding ◽  
Response Surface ◽  
Weld Seam ◽  
Welding Process ◽  
Galvanized Steel ◽  
Plant Production ◽  
Welding Parameters ◽  
Technical Instructions ◽  
Fillet Joint ◽  
Laser Welding Process

The wide use of galvanized steel in automobile manufacturing brings much challenge to the roof to body-side laser welding process. Fillet joint is an effective way to solve this problem such as pore in laser welding process. However, there is little research on this type of complicated joint process. Focused on this problem, take metallographic size of weld seam as the weld quality criteria, response surface methodology (RSM) is used to study the influence of laser welding parameters on weld seam quality. Finally, the optimum welding parameters are concluded to give technical instructions for the plant production.

Laser Transmission Welding of Thermoplastics—Part II: Experimental Model Validation

2007 ◽  
Vol 129 (5) ◽  
pp. 859-867 ◽  
Author(s):  
James D. Van de Ven ◽  
Arthur G. Erdman
Keyword(s):  
Polyvinyl Chloride ◽  
Welding Process ◽  
Weld Strength ◽  
Average Error ◽  
Welding Parameters ◽  
Laser Transmission Welding ◽  
Weld Width ◽  
Additional Information ◽  
Primary Model ◽  
Clamping Pressure

Two laser transmission welding experiments involving polyvinyl chloride are presented that aim to validate a previously presented welding model while helping to further understand the relationship between welding parameters and weld quality. While numerous previous research papers have presented the results of laser welding experiments, there exists minimal work validating models of the welding process. The first experiment explores the interaction of laser power and welding velocity while the second experiment explores the influence of clamping pressure. Using the weld width as the primary model output, the agreement between the welding experiments and the model have an average error of 5.6%. This finding strongly supports the validity of the model presented in Part I of this two paper set (Van de Ven and Erdman, 2007, ASME J. Manuf. Sci. Eng., 129, pp. 849–858). Additional information was gained regarding the operating window for laser transmission welding and the thermal decomposition of polyvinyl chloride. Clamping pressure was found to provide a small, but not statistically significant, influence on the visual appearance, weld width, and weld strength.

Study on Quality Control of the Laser Welding Joint

2013 ◽  
Vol 442 ◽  
pp. 276-281
Author(s):  
Qiang Wu ◽  
Lan Ying Xu
Keyword(s):  
Laser Welding ◽  
Salt Water ◽  
Harmful Effect ◽  
Welding Process ◽  
High Strength ◽  
Galvanized Steel ◽  
Welding Parameters ◽  
Test Results ◽  
Welding Joint ◽  
Corrosion Rates

During laser welding process of high-strength galvanized steel, adopting guiding arc plate and the connecting arc plate can avoid harmful effect resulted in unstable melting width. The galvanized layer protecting joint is inevitably lost by having been burned, which affects stain resistance of welding joint. So salt water with the concentration of 3% is used in the corrosion test for the samples welded under different laser parameters, mass variation and metallographic microscopes are gained after joint being corroded. The test results indicate that the corrosion rates of the joint are different under different welding parameters during laser welding of high-strength galvanized steel; their average corrosion rates are coincident with that of base metal and laser welding technology hardly effect corrosion resistance of the joint.

A Simulation of Spot Welding Process

2014 ◽  
Vol 657 ◽  
pp. 226-230 ◽  
Author(s):  
Viorel Cohal
Keyword(s):  
Process Parameters ◽  
Growth Curve ◽  
Spot Welding ◽  
Welding Process ◽  
Process Parameter ◽  
Welding Parameters ◽  
Welding Machine

The paper presents the optimization of spot welding parameters using offline simulation. The procedure of making simulation with SORPAS® is similar to the procedure of doing practical welding process, which can be divided into the following three steps:Data preparation - the materials and geometries of the workpieces and electrodes are defined, the type of welding machine is selected and the process parameters are specified.Running simulation of welding - the parts are welded in the selected welding machine with the specified process parameter settings. The simulations can be carried out in four ways: single simulations, batch simulations, automated optimizations and weld planning.Evaluation of results - the results of welding and quality of weld are evaluated thus the design and parameter settings are verified. With the optimization procedures the weld growth curve can be obtained.

Investigation of the effects of welding variables on the welding defects of the friction stir welded high density polyethylene sheets

2021 ◽  
pp. 009524432110588
Author(s):  
Mustafa Kemal Bilici
Keyword(s):  
Friction Stir Welding ◽  
High Density Polyethylene ◽  
Welding Process ◽  
High Strength ◽  
High Density ◽  
Welding Parameters ◽  
Friction Stir ◽  
Wide Range ◽  
Welding Defects ◽  
Welding Processes

Modern thermoplastic materials are used in an expanding range of engineering applications, such as in the automotive industry, due to their enhanced stress-to-weight ratios, toughness, a very short time of solidification, and a low thermal conductivity. Recently, friction stir welding has started to be used in joining processes in these areas. There are many factors that affect weld performance and weld quality in friction stir welding (FSW). These factors must be compatible with each other. Due to the large number of welding variables in friction stir welding processes, it is very difficult to achieve high strength FSW joints, high welding performance, and control the welding process. Welding variables that form the basis of friction stir welding; machine parameters, tool variables, and material properties are divided into three main groups. Each welding variable has different effects on the weld joint. In this study, friction stir welds were made on high density polyethylene (HDPE) sheets with factors selected from machine parameters and welding tool variables. Although the welding performance, quality, and strength gave good results in some conditions, successful joints could not be realized in some conditions. In particular, welding defects occurring in the combination of HDPE material with FSW were investigated. Welding quality, defects, and performances were examined with macrostructure. In addition, the tensile strength values of some the joints were determined. The main purpose of this study is to determine the welding defects that occur at the joints. The causes of welding defects, prevention methods, and which weld variables caused were investigated. Welding parameters and welding defects caused by welding tools were examined in detail. In addition, the factors causing welding defects were changed in a wide range and the changes in the defects were observed.

Optimization of Welding Process Parameters by Taguchi Method (Experimentation and Application)

2014 ◽  
Vol 592-594 ◽  
pp. 663-667
Author(s):  
B. Ramreddy ◽  
D. Choudhary ◽  
Sujeet Kumar
Keyword(s):  
Process Parameters ◽  
Signal To Noise Ratio ◽  
Continuous Process ◽  
Welding Process ◽  
Welding Parameters ◽  
Manufacturing Companies ◽  
Continuous Process Improvement ◽  
Performance Quality ◽  
Input Parameters

Recent evidences shows that the more and more manufacturing companies are recognizing the importance and necessity of quality improvement if they are to survive domestic and world-wide competition..Day by day technology is changing, accordingly the approach and the techniques to manage overall processes are also renewed. A systematic and efficient way to meet this challenge is the continuous process improvement. The continuous process improvement can be achieved by practicing TQM concepts. The important concepts are optimization of performance, quality and cost.. In this paper an attempt is made in an industry to optimize the process parameters of the welding process so that the overall performance of the process and the quality of product is improved. The Taguchi technique uses a tool called Orthogonal Array and a measure of quality called Signal-to-Noise ratio. .ANOVA is used to optimize the welding parameters (input parameters) to find the responses { output parameters) . The optimized input parameters are used to compare the output responses for both theoretical and actual , those obtained from the profile projector. The actual values are found to be comparable to the calculated values.

An Approach of Weighted Principal Component Analysis Based Taguchi Method for Parametric Optimization of Submerged Arc Welding

2012 ◽  
Vol 488-489 ◽  
pp. 866-870
Author(s):  
J. Deb Barma ◽  
Mitul B. Shil ◽  
P.K. Dan ◽  
A. Bandyopadhyay
Keyword(s):  
Taguchi Method ◽  
Process Parameters ◽  
Welding Process ◽  
Principal Component ◽  
Welding Parameters ◽  
Quality Level ◽  
System Specification ◽  
Weighted Principal Component ◽  
Joint Quality

Quality is the collection of features and characteristics of a product that contribute to its ability to meet given requirements. The quality of a weld joint is directly influenced by the welding parameters during the welding process. Often, a common problem that has been faced by the manufacturer is the control of the process parameters to obtain a good welded joint. Quality level is denoted as the probability of conformance and is a function of system variables and system specification. The present work is aimed to improve the quality of the weldment in SAW using Weighted Principal Component based Taguchi method. Three process parameters such as voltage, carriage speed and stand of distance are identified to carry out the study. Mechanical properties such as tensile strength and hardness are considered to be the response parameters in the present study.

scholarly journals Optimization of hot air welding process parameters for manufacturing textile transmission lines for e-textiles applications: Part I: Electro-conductive properties

2016 ◽  
Vol 87 (2) ◽  
pp. 232-243 ◽  
Author(s):  
Senem Kursun Bahadir ◽  
Simona Jevšnik
Keyword(s):  
Process Parameters ◽  
Transmission Lines ◽  
Signal Transmission ◽  
Welding Process ◽  
Welding Parameters ◽  
Hot Air ◽  
Conductive Yarns ◽  
Layered Fabric ◽  
Set Up ◽  
Conductive Properties

This paper presents optimization of the hot air welding process parameters for the formation of textile transmission lines and the electro-conductive properties of these manufactured transmission lines. A dedicated manufacturing set-up has been developed to allow a reliable and flexible textile signal transmission line at adequate conductivity. In order to manufacture textile transmission lines, different welding parameters with different conductive yarns and welding tapes were considered. Layered fabric structures consisting of textile transmission lines and fabrication tolerances were determined, as well as electro-conductive properties for welded samples. It was found that the choice of welding parameters, depending on the materials used for the formation of textile transmission lines, is extremely important for obtaining good electro-conductive properties. In addition, welding tapes and thermoplastic materials play an important role during the set-up of welding process parameters. Results statistically confirmed that welding tapes with conductive yarns can significantly cause a variety of changes in the signal qualities of welded textile transmission lines. The obtained results based on conductivity and signal-to-noise ratios are really promising for the manufacturing of e-textile transmission lines via hot air welding technology.

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