Research And Application Of Power Supply System Of Flash Butt Welding Machine In The Cold Rolled Sheet Line

The growing scientific and technological progress and world-wide people's material needs of rapid growth, led to the rapid development of industrial property, in particular, the rapid growth in steel consumption. Thus, for steel production of a variety of advanced technology and equipment, much national attention, the world's major steel producers competing to help improve the introduction and development of advanced steel production technology and equipment. For example, in cold-rolled pickling plant, in order to ensure continuous production in order to achieve higher product quality and production efficiency in the production of flash butt welding machine will be extensively used in cold rolling process of continuous pickling line (CPL) and full continuous cold rolling mill (TCM) of the entrance. Flash butt welding machine welding fittings not only meet the quality requirements, but also to meet the welding process, the reliability, stability, and fully automatic operation requirements. The current domestic steel manufacturers are spending heavily in the introduction of foreign flash butt welding machine, which not only significant loss of foreign exchange, but also restricting the development of independent innovation of domestic enterprises. Therefore, the digestion and absorption of flash butt welding machine working principle and control system, developed with independent intellectual property rights of the new type of flash butt welding machine, innovation and development of enterprises of great significance.This paper started by study the NMW flash welder, analyzed the choice of Flash welding parameters, and the chapter 3 analyzed the main circuit control unit and the hydraulic control system. The chapter 4 is the important. Beginning from the power supply control system of flash butt welding machine in the cold rolled sheet and pickling line, the hardware structure and control method are analyzed. It's focusing on the research of the butt welding transformer secondary voltage and the thyristor flow angle changing in the flash former stage, in the flash latter stage and in the upset stage. Load the power supply control system into the flash butt wielding machine, whose production practice shows that the application is well content the requirement of butt welding technology of the cold rolled sheet.