Research on the Precision of 2A12 Aluminum Alloy Plate Incremental Forming Assisted by Electric Pulse

This paper introduces the electroplastic effect into the sheet metal incremental forming process, using 2A12 aluminum alloy as the research material. An orthogonal experiment was designed, and the results were analyzed using range analysis and matrix analysis methods. The influence of electric current, frequency, and traditional incremental forming parameters on the forming accuracy of 2A12 aluminum alloy sheets was investigated. The results show that the introduction of pulse current can improve the forming accuracy of 2A12 aluminum alloy sheet. And within a certain range, as the electric current increases, the geometry accuracy of the part is significantly improved. Based on two accuracy indicators—average springback amount and springback angle, a comprehensive analysis determined that the optimal forming parameters are electric current 375 A, feed rate 600 mm/min, step size 0.6 mm, tool diameter 12 mm, and current frequency 400 Hz.