Energy Consumption at Underwater Exploding-Wire Gap in Electric Discharge Metal Forming

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概要

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• Current and voltage across underwater gap where fine copper wires are exploded electrically are measured and the energy consumed there is calculated. Discharge efficiency, which is the ratio of energy consumed at the gap to the initial energy stored at capacitor bank, is evaluated under various charging voltages up to 63 kV, charging energies up to 2.6 kJ and natural frequencies of discharge circuit ranging from 10 kHz to 50 kHz. The maximum discharge efficiency reaches more than 80%, which is attained under the optimum wire dimensions given as S_w^*=1.9×10^<-3> (C_oV_o)^<1.3>f_o^<0.65>, l_w^*=4.3V_of_o^<-2/3> where S_w^*(mm^2), l_w^*(mm) are optimum cross sectional area and length of copper wire respectively, V_o(V), C_o(F) are charging voltage and capacitance of capacitor bank and f_o(Hz) is natural frequency of the circuit.

• 一般社団法人日本機械学会の論文

著者

• OBARA Haruki

  FANUC Ltd.

• OBARA Haruki

  Fujitsu FANUC Ltd.

• TOBE Toshimi

  Professor, Faculty of Engineering, Tohoku University

• KATO Masana

  Associate Professor, Faculty of Engineering, Tohoku University

関連論文

• Metal Forming by Underwater Wire Explosions : 2. Experiments on Bulging of Circular Aluminum Sheets by Copper Wire Explosions
• Pressure Pulses Produced by Underwater Wire Explosions in Electric Discharge Metal Forming
• Metal Forming by Underwater Wire Explosion : 1. An Analysis of Plastic Deformation of Circular Membranes Under Impulsive Loading
• Energy Consumption at Underwater Exploding-Wire Gap in Electric Discharge Metal Forming

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