In its initial stage, the inductor manufacturing process was mainly to make shaped inductors from copper profiles. During the period from 1950 to 1960, the development of this process reached a new level. Accordingly, the sensors are manufactured in user factories and in small businesses. At that time, the major manufacturers of induction equipment concentrated their efforts on new power supplies and constructions with integrated control system devices to achieve higher throughput and efficiency. However, the lack of targeted programs and the lack of test equipment to evaluate the induction equipment scrap and explain the reasons hindered the development of induction equipment in terms of improved structure and extended service life. The analysis of the specific use of these equipment and the structural optimization of working conditions, because there is not enough scientific basis and is limited by the calculation means, mainly using trial and error method.
After such a start-up phase, considerable progress has been made in the manufacturing technology of equipment in the industrial zone, and the evolution of this development process is roughly similar to that of processing equipment. Major machine tools, such as lathes, milling machines, machining centers, etc., are manufactured by equipment manufacturers, while tools are supplied by other companies. However, different types of induction equipment have their own unique features, requiring corresponding analysis from a variety of factors, including mechanical devices (to achieve the reliability of the automation device) and the audit of the electromagnetic process, in order to ensure that the process requirements and Sufficient life. The development of induction equipment requires an in-depth understanding of induction heating methods, heating processes, and metallurgical knowledge related to heat treatment. Under today's competitive conditions, these companies must also have a good understanding of the technical and economic issues in high-automated production. These requirements are particularly important for achieving integration of induction heating and flexible production units. Under the premise of ensuring quality, the most important task is to achieve the highest productivity, because this is essential for the high return on investment capital.
1. Require a new attitude
Modern industries are placing new demands on induction heating, and some have gone beyond the capabilities of existing equipment manufacturers, many of whom are still working in stereotypes based on empirical test methods. If a complete service cycle is to be provided, equipment manufacturers should have both production and technical resources for design and manufacturing equipment. For equipment manufacturers, modern certification centers with commercial heat treatment are an essential advantage. Manufacturers of inductive equipment should also understand that the resolution of technical issues needs to be based on a sufficient scientific basis, including an in-depth understanding of mechanical, physical, electromagnetic and metallurgical processes, and computer resources for analysis and, in turn, the best solution. . This is a complex task, first and foremost because of the diversity of these topics. You can't expect a versatile model to meet all the requirements in the "plug and play" state. Each task requires specialized treatment methods, including quality, tolerance, productivity, and economical indicators to ensure minimum parts production costs, as well as maintenance services and service life of induction equipment.
2. Simulation
Existing computer programs are based on various methods such as finite element method (FEM), finite difference method (FDM), and boundary element method (BEM), but the development of these methods is not perfect enough to solve the induction heating. All of the complex tasks, taking into account the interrelationships between certain processes, in general, these tasks need to solve the 3D problem. In addition, there is no database of material properties that can meet the needs, and such databases are indispensable for analog induction heating systems. Without a well-developed database, it is impossible to get accurate simulation results. Recognizing the need for a suitable database for simulation, representatives from the US metallurgy, processing and sensing industry have established partnerships with the National Center for Manufacturing Sciences (NCMS, located in Annapur, Michigan) to develop A method for quantitative evaluation of tissue transformation during induction heating of steel. The result of this work was the development of ASTM International Standard A1033-04 "Quantitative Measurement of Standard Operating Procedures and Reports of Eutectic Carbon Steel and Low Alloy Phase Transitions" (see ).
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