PT  - JOURNAL ARTICLE
AU  - Miao, Hong
AU  - Shan, Xiang
AU  - Zhang, Shanwen
AU  - Jin, Yifu
AU  - Zuo, Dunwen
TI  - Process Online Monitoring on Cold Extrusion of Internal Thread in High-strength Steel
DP  - 2018 Dec 1
TA  - Manufacturing Technology Journal
PG  - 954--961
VI  - 18
IP  - 6
AID - 10.21062/ujep/207.2018/a/1213-2489/MT/18/6/954
IS  - 12132489
AB  - In order to solve the problems of data collection, data storage, artificial neural networks, real-time display of images, real-time monitoring of current status and recurrence of historical data, online monitoring system of cold extrusion of internal thread process is designed by LabVIEW8.5. The time-domain analysis and time-frequency-domain analysis are carried out for the torque signal, temperature signal, vibration signal, acoustic emission signal and transmitted signal. The research shows that: this online monitoring system can forecast processing status accurately, raise real-time alarm to replace or re-install the thread forming tap, accordingly avoids effectively the wreckage of thread forming tap and the scrap of work pieces; the fault recognition rate reaches 97%. And the practical model of online monitoring system for cold extrusion of internal thread process can be used to monitor working process.