Expansion of Cylindrical Tubular Workpieces on High-Voltage Magnetic-Pulse Installation with Controlled Vacuum Discharger

Materials Engineering eJournal Pub Date : 2021-06-25 DOI:10.20998/2074-272x.2021.3.07

L. A. Ljutenko, V. M. Mikhailov

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引用次数: 1

Abstract

Purpose. An experimental verification of the existence of a range of values for the parameters of the capacitive energy storage of the magnetic-pulse installations with controlled vacuum discharger, in which, with a high probability, there is a «cut» of the discharge current pulses and the expansion of cylindrical thin-walled tubular workpieces using an external coil. Methodology. High voltage magnetic-pulse installation of NTU «KhPI» with controlled vacuum discharger, multiturn coil with inside dielectrical die and inside aluminum alloy workpiece are used. The capacitance and charge voltage of capacitive energy storage are changed. Discharge current pulses are measured by Rogowski coil and the oscillograph. Results. Parts of complicated shape are made by expansion of cylindrical tubular workpieces with help of external coil. Pressed metallic tubular part is removable from inner dielectric rod. Originality. The frequency of «cut» pulse is defined by negative magnetic field pressure amplitude. It is shown that we must coordinate this frequency and charge voltage with capacitive storage parameters by high probability of pulse «cut». Practical value. It is shown how to use installations with controlled vacuum dischargers in magnetic forming technology based on «cut» pulses.

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高压磁脉冲控制真空放料装置上圆柱管状工件的膨胀

目的。实验验证了可控真空放电装置的容性储能参数范围的存在性，其中很可能存在放电电流脉冲的“切割”和圆柱形薄壁管状工件使用外部线圈的膨胀。方法。采用NTU«KhPI»高压磁脉冲装置，控制真空放电，多匝线圈内介电模具和内铝合金工件。改变电容储能的电容和充电电压。用罗氏线圈和示波器测量放电电流脉冲。结果。利用外部线圈对圆柱形管状工件进行膨胀，制成形状复杂的零件。压紧的金属管状部件可从内介电杆上拆卸。创意。“切断”脉冲的频率由负磁场压力幅值定义。结果表明，我们必须通过高概率的脉冲“切断”来协调该频率和充电电压与电容存储参数。实用价值。演示了如何在基于“切割”脉冲的磁成形技术中使用控制真空放电装置。

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Materials Engineering eJournal

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