Magnetic-Pulse Car Body Panels Flattening. Theoretical Aspects and Practical Results

Abstract

The aim of the article is to provide theoretical and experimental studying of the «induction system with an attractive screen» practical effectiveness with the excited magnetic pulse attractive forces numerical estimation. Originality. For the first time, the theoretical analysis of the electrodynamics process for the «inductor system with attractive screen» at the low frequent assumption were conducted. Methodology of the analysis applied is based on the classic electrodynamics circuits theory. All of the resulted carried out, were obtained as the Maxwell's differential equation solutions and its behavior was analyzed analytically. Results. The electrodynamics process was analyzed and the principle efficiency of the «induction system with an attractive screen» as an effective tool for magnetic pulse forming of the thin sheet metals was substantiated. The axis distributions of the attractive forces based on the relations been obtained were illuminated graphically. The results of experimental testing of the system in the engineering operation of the external non-contact dents removing on the car body panels samples were presented. Practical value. According to the results of the calculation analyses the fundamental workability of the «inductor system with attractive shield» as an effective magnetic pulse sheet metal part attraction tool was proved. It was shown that the not deep metal surface damages could be worked up by magnetic pulses technologies with a high performance in a short time. References 12, figures 4. Keywords: magnetic-pulse forming, inductor system, field tension, inducted current density, electromagnetic processes.Проведен анализ электродинамических процессов и обоснована принципиальная работоспособность «индукторной системы с притягивающим экраном», как эффективного инструмента магнитно-импульсной рихтовки тонкостен-ных листовых металлов. Представлены результаты экспериментальной апробации системы в производственной операции по внешнему бесконтактному удалению вмятин в образцах кузовных панелей автомобилей. Библ. 12, рис. 4. Ключевые слова: магнитно-импульсная рихтовка, индукторная система, напряженность поля, плотность индуциро-ванных токов, электромагнитные процессы.Introduction and publications analysis. The applying of magnetic fields for metals engineering is widely used [1]. Now, the contemporary technologies allow to make production available and technically simple of the complexes for electromagnetic-pulse metals forming (EMF). Currently EMF technology got widespread throughout the world [2]. Therefore, firms like «Boeing», «Electroimpact» and «Flextronic» use this technology for repair namely to remove dents on the fuselage of the aircraft [3,4]. We should note so company like «Betag Innovation» (last «Beule Technik AG») that has the practice-approved experience at the area of the development of various systems for the car body panels dents removing [5].In the laboratory of the electromagnetic technologies at the Kharkiv National Automobile and Highway University (KhNAHU) the developme...