Welding Operation Technique of Welding Electrode Arc Welding Overhead Welding Test Board

2020 ◽  
Vol 861 ◽  
pp. 122-126
Author(s):  
Xing Hui Li
Keyword(s):  
Arc Welding ◽  
Theoretical Basis ◽  
Welding Process ◽  
Technical Level ◽  
Operation Technique ◽  
Welding Operation ◽  
Single Side ◽  
Test Board ◽  
Manual Arc Welding ◽  
Welding Electrode

Welding electrode arc welding, upside welding, single side welding, double side forming welding operation technology is the most difficult welding process in manual arc welding operation. It is an operation technology that senior welding operators must master, and it reflects the technical level of the welding welder. . In this paper, the welding operation essentials and operation skills of backing welding, filling welding and cover welding are studied for the welding operation of the back welding test board, which creates a theoretical basis for the improvement of the welding operator's operation skills.

The Determination of Noxes Emissions in Case of Manual Arc Welding Process with Coated Electrode

2018 ◽  
Vol 69 (7) ◽  
pp. 1826-1829
Author(s):  
Claudiu Babis ◽  
Augustin Semenescu ◽  
Oana Roxana Chivu ◽  
Maria Alina Gligor ◽  
Gabriel Iacobescu ◽  
...  
Keyword(s):  
Production System ◽  
Arc Welding ◽  
Welding Process ◽  
Practical Method ◽  
Machine Building ◽  
Short Exposure ◽  
Metal Bath ◽  
Coated Electrode ◽  
Manual Arc Welding ◽  
Arc Welding Process

The occupational risk assessment of a machine building company must cover each activity and workstation, taking into account each component of the production system (work system), each workload, work equipment and the work environment. This assessment is an extremely complicated and complex issue since the production system of such an enterprise is particularly complex and complicated. Welding assembly is a highly polluting technology process, especially of the atmosphere and soil. The formation of gases in the welding process is the result of burning of the electrodes, powders, forming the molten metal bath and making the weld seam. Welding operators are exposed to smoke and toxic gases resulting from the welding process, which can in many cases be hazardous to health. Many acute intoxications that may be caused by excessive exposure to or short exposure to smoke and gas resulting from the welding process have been studied over time. In the paper are presented the elements of risk related to the welding process and the most widespread occupational diseases that can occur in the ranges of the welding operators. The following are presented the noxious emissions from welding and are determined by a practical method the emission of noxious at welding deposition of a welding sample, using the manual arc welding process with coated electrode.

Development of Technology for Welding Repair of Steel Housings Using a Combination of Ultrasonic Vibrations and Forced Cooling

2020 ◽  
Vol 989 ◽  
pp. 747-752
Author(s):  
Marat R. Fatkullin ◽  
Ayrat M. Fayrushin ◽  
Rif G. Rizvanov
Keyword(s):  
Heat Treatment ◽  
Residual Stresses ◽  
Weld Pool ◽  
Welded Joints ◽  
Arc Welding ◽  
Oil And Gas ◽  
Welding Process ◽  
Subsequent Heat Treatment ◽  
Manual Arc Welding ◽  
Forced Cooling

Now, one of the most pressing issues in the development of petroleum engineering is increasing the efficiency of apparatus and machines, as well as reducing material, energy and labor resources. During operation, oil-refining equipment over time destroyed by welded joints due to the impact of power and temperature loads, corrosion, and other factors. The cause of damage in welded joints of oil and gas equipment can be justified by the occurrence in them of structural heterogeneity and residual stresses during and after welding. Today manual arc welding is almost the only applicable in the repair of equipment for oil and gas processing, which require welding operations. The high temperature source of energy and the difference in deformation properties of parts are the cause of the occurrence of substantial residual stresses, which cause a change in shape, a significant decrease in strength, a decrease in the corrosion resistance of the metal, which adversely affects the durability and reliability of the structure. At present, the technology of repair with due to manual arc welding with the concomitant heating of the defective area and subsequent heat treatment is used. A complex of simultaneously proceeding processes accompanies the welding process: thermal effects on the metal in the heat-affected zone, metallurgical processes in the weld pool and crystallization of the metal in the weld pool. The repair technology presented by us, which consists in a combination of ultrasonic shock vibrations and forced cooling during the welding process, allows to improve the mechanical properties of the welded joint, as well as to refuse to carry out heating during welding and subsequent heat treatment.

Optimization of Welding Electrode Coating Composition Based on Simulation of Interaction Processes in Metal-Slag-Gas System

2016 ◽  
Vol 870 ◽  
pp. 593-597
Author(s):  
M.P. Shalimov ◽  
E.B. Votinova
Keyword(s):  
Theoretical Investigation ◽  
Arc Welding ◽  
Electrode Coating ◽  
Interaction Processes ◽  
Manual Arc Welding ◽  
Gas System ◽  
Coating Composition ◽  
Welding Electrode ◽  
The Way

The way of calculation of welding electrode coating composition using the results of experimental and theoretical investigation into the processes of interaction in a metal-slag-gas system under the conditions of manual arc welding is described.

scholarly journals Mechanical Behavior of ARC Welding using Different Flux Materials

2019 ◽  
Vol 9 (2) ◽  
pp. 4344-4349
Keyword(s):  
Stainless Steel ◽  
Arc Welding ◽  
Large Scale ◽  
Welding Process ◽  
Hardness Test ◽  
Welding Parameters ◽  
Small Scale ◽  
Work Piece ◽  
Welding Operation ◽  
Small Scale Industries

To perform welding process on the material under varying conditions with different flux materials, different welding parameters and further subjecting the material to various suitable tests such as tensile test, hardness test, optical tests and study the characteristics of the material under testing. The tests conducted on the welded work piece it is proposed the suitable parameters under which welding of greater precision can be performed. it is also analyzed the working conditions under which the selected work piece material of stainless steel grade 304 would deviate from its desired characteristics. From the results of the tests it is able to determine the conditions that would reduce the characteristics of the welded work piece. Thus it can be further used for reference when the welding process is done on the same material of stainless steel of grade 304. The electrodes that were chosen for this project were selected by the criteria of widely used and chief material in the welding of various grades of stainless steel. The composition of the chemicals that constitute the electrodes were tribiologically analyzed and studied. The need for high precision welding in large scale as well as small scale industries is relatively high as the threshold for errors in such areas are greatly undesirable. The results of this study would greatly contribute to the reduction of errors and defects in the welding operation.

Welding Problems in Shipbuilding

1969 ◽  
Vol 6 (01) ◽  
pp. 66-75
Author(s):  
Koichi Masubuch
Keyword(s):  
Arc Welding ◽  
State Of The Art ◽  
Welding Process ◽  
Shipbuilding Industry ◽  
Technical Problems ◽  
Metal Structures ◽  
The Past ◽  
Manual Arc Welding ◽  
Arc Welding Process ◽  
Welding Processes

During the past 30 years, many new welding processes have been applied to the fabrication of various metal structures. However, these processes have largely been ignored by the shipbuilding industry, and modern ships continue to be fabricated primarily by a manual arc-welding process that is more than fifty years old. This paper discusses some of the problems related to welding ship structures, focusing mainly upon two important subject areas:new welding processes, andnotch toughness of weld metal. The author reviews briefly developments in the technology and, emphasizing the technical problems, indicates how research can improve the state of the art.

Investigating the Influence of the Power Supply Type upon the Weld Joints Properties and Health Characteristics of the Manual Arc Welding

2011 ◽  
Vol 704-705 ◽  
pp. 608-611 ◽  
Author(s):  
D.P. Ilyaschenko ◽  
D.A. Chinakhov
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Power Supply ◽  
Arc Welding ◽  
Welding Process ◽  
Weld Joints ◽  
Manual Arc Welding ◽  
Arc Welding Process ◽  
New Generation ◽  
The Given

The given work considers the influence of the power supply type (diode rectifier ВД-306 and upon new generation inverter Nebula-315) upon the chemical composition, microstructure, mechanical properties of the weld joints and health characteristics of the manual arc welding process.

Investigating the Influence of the Power Supply Type upon the Properties of the Weld Joints under Manual Arc Welding

2014 ◽  
Vol 1040 ◽  
pp. 837-844 ◽  
Author(s):  
D.P. Il’yaschenko ◽  
Dmitry A. Chinakhov ◽  
Y.M. Gotovschik
Keyword(s):  
Power Supply ◽  
Arc Welding ◽  
Impact Resistance ◽  
Welding Process ◽  
Negative Temperature ◽  
Weld Joints ◽  
Manual Arc Welding ◽  
Arc Welding Process ◽  
New Generation ◽  
The Given

The given work considers the influence of the power supply type (diode rectifier DR-306 and inverter Nebula-315) upon the chemical composition, microstructure, mechanical properties of weld joints and upon health characteristics of the manual arc welding process.It has been ascertained that the power supply type has a significant influence upon the weld joints properties and health characteristics of the manual arc welding process. Using a new generation inverter power supply allows less heat input into the weld bead, thus, decreasing silicium and manganese burning, improving impact resistance of weld joints under low (negative) temperature and reduces the risk of respiratory diseases for the workers.

scholarly journals STUDY OF THE EFFECT OF MODIFIERS WITH ULTRADISPERSED PARTICLES IN THE COATING OF THE ELECTRODE FOR MANUAL ARC WELDING ON THE TECHNOLOGICAL PARAMETERS IN MANUFACTURE OF THE ELECTRODE

2018 ◽  
pp. 108-112 ◽  
Author(s):  
N. I. Urbanovich ◽  
V. V. Melnichenko ◽  
K. E. Baranovsky ◽  
E. V. Rozenberg ◽  
A. A. Radchenko ◽  
...  
Keyword(s):  
Arc Welding ◽  
Ultrafine Particles ◽  
Technological Parameters ◽  
Electrode Coating ◽  
Manual Arc Welding ◽  
The Stability ◽  
Welding Electrode ◽  
Different Thickness ◽  
Modifying Additive

It is established that inclusion of the modifier into the electrode coating allowed to change the grains of the weld metal from 20–60 to 10–30 mm, to change its morphology and to improve the welding-technological properties of the coated electrode. It is shown that the modifying additive introduced into the coating of a welding electrode containing ultrafine particles in an amount of 1% of the weight of the dry charge had not deteriorated the technological parameters during manufacture, and the integral index of the different thickness (Desp) of electrodes with standard and experimental coatings did not add to the accepted value of 0.05. This indicates that the quality of the lubricating mass, its properties, the stability of the mass flow from the spinneret are satisfactory for both batches.

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