陈俊潮,韩红彪,王中豪,王顺.不同电极运动形式下电火花堆焊的放电机理分析[J].表面技术,2021,50(6):281-287, 316.
CHEN Jun-chao,HAN Hong-biao,WANG Zhong-hao,WANG Shun.Analysis of Discharge Mechanism of Electric Spark Overlaying in Different Modes of Electrode Movement[J].Surface Technology,2021,50(6):281-287, 316 |
| 不同电极运动形式下电火花堆焊的放电机理分析 |
| Analysis of Discharge Mechanism of Electric Spark Overlaying in Different Modes of Electrode Movement |
| 投稿时间：2019-12-10 修订日期：2020-06-09 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.06.032 |
| 中文关键词: 电火花堆焊 旋转电极 超声振动电极 短路放电 间隙放电 电流波形 |
| 英文关键词:electric spark overlaying rotating electrode ultrasonic vibration electrode short circuit discharge gap discharge current waveform |
| 基金项目:国家自然科学基金(51375146);河南省高等学校重点科研项目(17A460012) |
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| Author | Institution |
| CHEN Jun-chao | School of Mechatronics Engineering,Luoyang 471003, China |
| HAN Hong-biao | School of Mechatronics Engineering,Luoyang 471003, China ;Henan Key Laboratory of Machinery Design and Transmission System, Henan University of Science and Technology, Luoyang 471003, China |
| WANG Zhong-hao | School of Mechatronics Engineering,Luoyang 471003, China |
| WANG Shun | School of Mechatronics Engineering,Luoyang 471003, China |
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| 中文摘要: |
| 目的 分析不同电极运动形式下，电极与基体之间接触状态的变化，研究其对电火花堆焊放电机理的影响。方法 通过旋转电极连续放电试验、超声振动电极连续放电试验、旋转电极与超声振动电极的沉积效率试验，对旋转电极和超声振动电极的连续放电电压和电流波形、电极与基体的接触状态和相对运动进行了分析。结果 旋转电极的放电类型有短路放电、间隙放电和1种混合放电，超声振动电极的放电类型有短路放电、间隙放电和6种混合放电。在放电参数相同的条件下，旋转电极的短路放电平均电流为11.29 kA，间隙放电平均电流为6.9 kA，转移系数为79%;超声振动电极的短路放电平均电流为6.0 kA，间隙放电平均电流为3.66 kA，转移系数为92%。结论 电极的运动形式直接影响电极与基体接触点之间接触状态(即接触间隙、接触面积和接触电阻等)的变化，从而影响其放电类型、放电电流和沉积效率等。旋转电极和基体之间为切向旋转运动，接触点处的电阻小且间隙变化小，放电电流较大而放电类型较少。超声振动电极与基体之间为上下超声振动，接触点处的电阻大，间隙变化范围大且变化速度快，放电电流较小而放电类型较多。 |
| 英文摘要: |
| The work aims to analyze the change of contact state between electrode and substrate in different modes of electrode movement and study its influence on the discharge mechanism of electric spark overlaying. The continuous discharge tests of rotating electrode and ultrasonic vibrating electrode, and the deposition efficiency tests of rotating electrode and ultrasonic vibrating electrode were carried out. The continuous discharge voltage and current waveforms of rotating electrode and ultrasonic vibrating electrode, the contact state and relative motion between electrode and substrate were analyzed. The discharge types of rotating electrode include short-circuit discharge, gap discharge, and a type of mixed discharge. The discharge types of ultrasonic vibrating electrode are short circuit discharge, gap discharge, and six types of mixed discharge. Under the same discharge parameters, the average current of short circuit discharge of rotating electrode is 11.29 kA and the average current of gap discharge is 6.9 kA. And the transfer coefficient is 79%. the average current of short circuit discharge of ultrasonic vibrating electrode is 6.0 kA and the average current of gap discharge is 3.66 kA and the transfer coefficient is 92%. The movement of electrode affects the state of contact point between electrode and substrate, such as the contact gap, contact area, and contact resistance, etc., thus affecting the discharge type, discharge current, and deposition efficiency. There is a rotational movement in a tangential direction between rotating electrode and substrate, the contact resistance and the change of gap at contact point are small, which results in large circuit discharge and fewer discharge types. There is a up and down ultrasonic vibration between ultrasonic vibrating electrode and substrate, the contact resistance is large and the change of gap at contact point has a wide range and is rapid, which results in more discharge types. |
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