论文部分内容阅读
Due to the high production efficiency and automation applications,short cycle arc stud welding is widely used in automotive industry. A system composed of signal acquisition unit and analysis software was developed in this paper. The signal acquisition unit consisted of PIC18F4580 and circuits of power supply,signal conditioning,external storage and RS485 communication,and the signals of welding current and voltage were gathered,stored,and transferred by software of the AD sampling,data storage and communication respectively based on the judgment of welding state. The interface of the system was programmed by Microsoft Visual Studio C#,which included the main window,welding process analysis window,penetration threshold settings window and alarm window. DP600 galvanized sheet trial showed that the short cycle arc stud welding analysis system could extract the characteristic values of the welding process,judge the stability of the arc.Penetration calculated by the system coincided well with actual values. Online monitor conclusion agreed well with the results of visual inspection,macro examination and torque test. The data collected by the system could be used to identify the causes of poor quality.
Due to the high production efficiency and automation applications, short cycle arc stud welding is widely used in automotive industry. A system composed of signal acquisition unit and analysis software was developed in this paper. The signal acquisition unit consisted of PIC18F4580 and circuits of power supply , signal conditioning, external storage and RS485 communication, and signals of welding current and voltage were gathered, stored, and transferred by software of the AD sampling, data storage and communication respectively based on the judgment of welding state. The interface of the system was programmed by Microsoft Visual Studio C #, which includes the main window, welding process analysis window, penetration threshold settings window and alarm window. DP600 galvanized sheet trial showed that the short cycle arc stud welding analysis system could extract the characteristic values of the welding process , judge the stability of the arc. Penetration calculated by the system coincided well w Online monitor conclusion agreed well with the results of visual inspection, macro examination and torque test. The data collected by the system could be used to identify the causes of poor quality.