The article addresses the mathematical model of manual arc welding with coated electrodes, based on complete material balance, the model is a three equation system. The first equation describes the interaction between average and partial transition coefficients; the second equation shows the transition of an element from the metal phase; the third one characterizes the reduction of an element from the slag phase. The results of modeling for base and rutile electrode are given. The convergence of experimental data and calculations is shown. The regressionequations to calculate the parameters required for forecasting the composition of overlaying metal and weld metal in manual arc welding are listed.
The paper addresses mathematical models of element transition into overlaying metal and weld metal in different methods of arc welding: stir welding, welding taking account the transition coefficients, empirical, kinetic, and thermodynamic welding. Their comparative analysis is made, their advantages, disadvantages, as well as various applications, are demonstrated. The approach to creation of mathematical models of manual arc welding with coated electrodes and flux cored wire, based on the method of complete material balance, is grounded.
The tutorial provides basic information about the purpose, content, basic principles and organization of technological preparation of welding production. The types of technical documents, their purpose and content; fundamentals of design of technological process of manufacture of welded structures. Special attention is paid to the optimisation of the design for manufacturability.
A careful study of the textbook material will prepare the student for designing welded structures with the required accuracy and reliability at a given performance and economic efficiency, as well as development of technological processes of welding, providing the weld joints with the desired properties of reliability and safe operation of welded products.
Designed for students training areas 15.03.01 mechanical engineering, 12.03.05 "Laser engineering and laser technologies" may be useful to students of lyceums, colleges, vocational schools and technical schools.
The textbook provides information about the origin and about the main stages of development of one of the first, and today one of the most common technological processes of welding materials. A brief information about the main types of welding energy sources used for obtaining permanent connections about the physical nature of the welding processes. Examples of equipment required to implement various technological operations. Modern problems of welding science and technology.
Designed for students directions 15.03.01 mechanical engineering, 12.03.05 "Laser engineering and laser technologies and specialty", 15.05.01 "Design of technological machines and complexes", may be useful to students of lyceums, colleges, vocational schools and technical schools, as well as a wide range of readers to discover the fundamentals of welding technology.
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