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Parmar, R. S.
- Factorial Technique-An Approach for Prediction of Bead Geometry and Shape Relationships of Hyperbaric Welding
Abstract Views :227 |
PDF Views:4
Authors
Affiliations
1 Deptt. of Science and Technology, Govt, of India, New Delhi, IN
2 Indian Statistical Institute, New Delhi, IN
3 lndian Institute of Technology, New Delhi, IN
1 Deptt. of Science and Technology, Govt, of India, New Delhi, IN
2 Indian Statistical Institute, New Delhi, IN
3 lndian Institute of Technology, New Delhi, IN
Source
Indian Welding Journal, Vol 25, No 3 (1992), Pagination: 170-173Abstract
Factorial technique is a statistical method used for designing of experiments. This paper contains various techniques generally used in designing the experiments, their merits and limiations. It has included the system of designing of five level Factorial technique with four welding variables to be used for PULSE MIG HYPERBARIC welding. Finally, the application of Factorial design to study the weld bead geometry and shape relationship has been explained.
- Effect of Process Variables on Angular Distortion of Pulse MIG Welded HSLA Plates
Abstract Views :207 |
PDF Views:5
Authors
A. Mandal
1,
R. S. Parmar
2
Affiliations
1 Prod. Engg. Dept., NIFFT, Hatia, Ranchi, Bihar, IN
2 Mech. Engg. Dept., l.l.T. Delhi, New Delhi, IN
1 Prod. Engg. Dept., NIFFT, Hatia, Ranchi, Bihar, IN
2 Mech. Engg. Dept., l.l.T. Delhi, New Delhi, IN
Source
Indian Welding Journal, Vol 30, No 3 (1997), Pagination: 26-34Abstract
Angular distortion is a major problem and most pronounced amongst different types of distortion in the butt welded plates. It is difficult to obtain a completely analytical solution to the problem of anguiar distortion which may be reliable over a wide range of processes, materials and procedural variables. In this study, the statistical method of 2 level full factorial technique has been used to aevelop models which correlate angular distortion with Pulse MIG process variables and joint parameters.- Welding-Its Past Present and Future
Abstract Views :245 |
PDF Views:5
Authors
Affiliations
1 IIT, Delhi, IN
1 IIT, Delhi, IN
Source
Indian Welding Journal, Vol 30, No 4 (1997), Pagination: 9-30Abstract
Welding is a major technology in present-day industry, and its state of art has a decisive effect on advances in mechanical, construction and many other industries. Today, the science and art of welding encompasses a wide range of processes and procedures applicable to materials of any thickness and shape - from tiny electronics components to huge-sized machines and structures.- Investigation of Heat Flow during MIG Welding of Stainless Steel 409M Plates and Prediction of Bead Parameters
Abstract Views :223 |
PDF Views:4
Authors
Affiliations
1 Department of Mechanical Engineering, NSUT, New Delhi, IN
2 Department of Mechanical Engineering, IIT Delhi, IN
1 Department of Mechanical Engineering, NSUT, New Delhi, IN
2 Department of Mechanical Engineering, IIT Delhi, IN
Source
Indian Welding Journal, Vol 53, No 4 (2020), Pagination: 42-50Abstract
Nearly 90% of welding in the world is carried out by one or the other arc welding process, therefore it is imperative to discuss the aspect of heat flow and temperature distribution in arc welding.The knowledge of temperature distribution in plates during and after welding is necessary for predicting microstructure, calculating bead parameters, distortions and residual stresses. Thus, to achieve a weld of desired quality to perform in service satisfactorily, it is essential to know the temperature distribution during welding. In the present case, an arrangement of thermocouples was developed with microprocessor based electronic control which was successfully used to plot real time temperature graphs (thermal histories) during welding of plates at different input parameters. From these temperature plots, isotherms for different weldments were generated which were found helpful in determining the cooling rates. These weld isotherms were then used to estimate temperature at different points. These results were then compared with their estimated values calculated from empirical relations and were found to be in coherence with the experimental values within reasonable limits. The peak temperature values obtained from the thermal histories were used to approximately estimate the critical weld bead dimensions like penetration and weld width with the help of empirical relations and when compared with actual values, were found to be in good conformance.Keywords
Arc Welding, Temperature Distribution, Thermocouples, Temperature Graphs, Bead Parameters.References
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