Argun S. Development of a magnetic-pulse installation for external noncontact car body straightening

This thesis is devoted to the development of a magnetic-pulse installation for external nonconduct car body straightening. The method of magnetic-pulse straightening is first applied. It is based on the use of a controlled and graduated force that puts noncontact pressure on the damaged section of a car body. The methods of the development of force impact sources for external magnetic-pulse straightening that enable to regulate the force of impact on the deformed section of a car body, and the methods of the calculation of the electromagnetic processes taking place in the source of force impact that enable to take into account the induction links in the installation discharge circuit are further developed. The analysis of the modern methods to straighten a car body and the energy sources in the technologies with the pulse-magnetic field energy is made. It clearly indicates that the magnetic-pulse installation is the most expensive element of system and the quality of straightening depends on the technical implementation of installation. The theoretical and experimental researches of electromagnetic processes in the magnetic-pulse installation in the mode of reiteration of discharge pulses are conducted. It enables to straighten a car body by means of the train of force impacts. The magnetic-pulse installation for the multiple generation of discharge pulses is proposed and substantiated. The dominating influence of current-limiting resistance on the operation of the installation is discovered. The experimental test of the magnetic-pulse installation in the scheme of a repair complex for external noncontact car body straightening is made. According to research data, the scheme implementation of the installation charging circuit has a significant impact on the processes in the discharging circuit. The scheme that uses a thyristor as a trigger, which disconnects the charging and discharging circuits, is optimal.