A Uniform Pressure Actuator With High Forming Efficiency Based on the Pulsed Magnet Manufacturing Technique

Abstract

The uniform pressure actuator (UPA) is a specially designed coil for use in electromagnetic forming (EMF) process, which offers a uniform pressure distribution in flat sheet forming. The traditional coil has high strength but low forming efficiency. In this paper, in order to improve the forming efficiency, a novel coil is designed and analyzed based upon the manufacturing technique of pulsed magnets. The theoretical analysis for the forming efficiency is carried out. Both the numerical and experimental techniques are used to calculate and compare the forming efficiency of coils. After that, destructive experiment is conducted to test the coil strength. It has been found that the more turns per unit length and the smaller the skin depth of the coil can improve the forming efficiency of the coil obviously. The results show that the designed coil by the manufacturing technique of pulsed magnets has considerable strength with higher forming efficiency compared to the traditional ones.