火炮身管大缠角混合膛线计算机数字控制电解加工技术研究

分析了火炮身管大缠角混合膛线的成型过程，提出圆锥体单边切进楔形工作齿的阴极结构，经试验确定了阴极体锥度、长度与楔形工作齿角度的匹配关系。编制了电解加工专家系统，对阳线进出口和中间段分别采用电压控制和电流控制，实现了在控制阴极进给和旋转的同时在线检测并控制加工参数。生产证明该阴极结构合理，控制系统精确。

CNC-ECM of the Mixed Rifle with a Large Spiral Angle in Cannon

This article focuses on the process of shaping the mixed rifle with a large spiral angle in the cannon, and proposes a cone-like cathode structure with asymmetric cuneiform working tooth. The degree of cone, length and the angle of the cuneiform working tooth were determined experimentally and those parameters were matched well. An expert system of ECM is then implemented. As a result, control of voltage and electric current can be respectively applied to the convex line of the rifle at exit and middle part of the tube. The on-line measurement and control of machining parameters can be performed simultaneously with the control of rotation and precession of the cathode as well. The manufacturing practice demonstrates that the cathode structure is ap- propriate and the control system is accurate.