一种电火花沉积接触力自动控制装置和沉积试验  

An automatic control device of contact force for electrospark deposition and deposition test

作　　者：王顺 童金钟 韩红彪[1] WANG Shun;TONG Jinzhong;HAN Hongbiao(Henan University of Science and Technology,Luoyang 471003,China;Sinopec Huabei Oilfield Service Corporation,Zhengzhou 450006,China)

机构地区：[1]河南科技大学,洛阳471003 [2]中石化华北石油工程有限公司,郑州450006

出　　处：《焊接学报》2021年第3期42-47,I0004,I0005,共8页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51375146);国家智能制造综合标准化项目(2018ZNZX01-02);河南省高等学校重点科研项目(17A460012).

摘　　要：为了研究接触力对电火花沉积过程的影响,设计了一种电火花沉积接触力自动控制装置,进行了不同接触力下的自动沉积试验,分析了不同接触力下的沉积效率、质量转移效率、沉积层表面形貌和各种放电波形的数量等.结果表明,接触力为1.0 N时,取得了较大的沉积效率和质量转移效率,沉积层的表面质量也较好.设计的电火花沉积接触力自动控制装置能够恒定保持电极与工件之间的接触力,实现电极的自动进给.接触力的变化改变了电极与工件的接触状态,随着接触力的增大,自动沉积过程产生的火花和飞溅减少,短路放电数量增加而接触放电数量减少,从而影响自动沉积效率和沉积层的质量.在一定试验条件下,选择合适的接触力,可提高沉积效率和质量转移效率,获得较好的沉积层质量.An automatic control device of contact force for electro-spark deposition was designed to study the influence of contact force on electro-spark deposition.Automatic deposition with different contact forces was tested.The deposition efficiency,mass transfer efficiency,surface morphology of deposited layer and the number of various discharge waveforms under different test conditions were analyzed.The results show that when the contact force is 1.0 N,the maximum deposition efficiency and mass transfer efficiency are achieved,and the surface quality of the deposited layer is also good.The automatic control device for the contact force of electro-spark deposition can maintain the contact force between the electrode and the workpiece,so as to keep automatic electrode feeding.The change of contact force will change the contact status between the electrode and workpiece.With the increase of the contact force,sparks and splashes produced in automatic deposition decrease,and the shortcircuit discharges increase while the contact discharges decrease,thus affecting the automatic deposition efficiency and the quality of deposited layer.Under certain test conditions,selecting the appropriate contact force can improve the deposition efficiency and mass transfer efficiency,and obtain a better quality of the deposited layer.

关 键 词：电火花沉积 接触力 自动控制 旋转电极 

分 类 号：TG456.9[金属学及工艺—焊接]