基于过程参数的点焊质量监测研究  

Quality Monitoring of Resistance Spot Welding based on Process Parameters

作　　者：李如雄[1] 方平[2] 

机构地区：[1]景德镇陶瓷学院机电学院,江西景德镇333403 [2]南昌航空工业学院材料科学与工程学院,江西南昌330034

出　　处：《科技通报》2011年第5期740-745,共6页Bulletin of Science and Technology

基　　金：江西省青年基金项目(GJJ10228);江西省科技厅青年基金项目;江西省材料科学与研究中心基金资助项目(ZX20031001);江西省教育厅基金资助项目(DB200301069);江西省景德镇市科技计划项目

摘　　要：以电阻点焊质量在线监控为目的,设计一套高速采集和处理点焊信号系统,系统硬件主要由PCL-1800高速数据采集卡、电流电压传感器、信号调理电路、工业控制微机组成,主要负责完成瞬时数据的A/D转换和采集;软件主要包括数据采集存储模块,数字信号的小波滤波,点焊电信号的U-I图分析和能量分析等模块,实现了对焊接电流、电极间电压、焊接周波数进行高精度数据采集与处理。实验结果显示不同材料点焊时,其点焊U-I图的形状具有明显的不同,根据U-I图可了解焊接过程电流电压是否正常,以及每个半周波输入的能量,从而判断焊点的质量,因此,不同材料点焊质量监测可采用点焊U-I图监测法。For on-line monitoring and controlling the quality of resistance spot welding, we design a high speed data acquisition and spot welding signal processing system. System hardware, which are made up of PLC 1800 high speed data acquisition card,current sensor.voltage sensor.signal adjust circuit and IPC,is mainly responsible for A/D conversion and data acquisition; software system are mostly made up of data acquisition and memory module.wavelet filtering of digit signal module,U-I image and energy analyze module in electric signal of spot welding,which realize the data acquisition and processing base on welding current.electrode voltage.welding cycle. The experimental result showed that U-I image shape of different material are markedly dissimilar in spot welding, according to U-I image we can check if welding current and electrode voltage are normal in welding process or not, and through U-I image we can read the input energy of every U-I curve half-cycle and judge spot welding quality. Therefore,we can take U-I image monitoring method in spot welding quality monitoring of different material.

关 键 词：点焊 U—I图 喷溅 

分 类 号：TP274.5[自动化与计算机技术—检测技术与自动化装置]