The paper introduces a transformation by PLC and frequency-changer in the light of current lashing problem of drawing-oil tube cleaning machine in oil field enterprises.
本文针对油田企业中抽油管清污机中存在的冲击问题，用PLC、变频器等对其控制进行了改造。
2
The length of the papertube can be adjusted freely. The most remakable feature of this machine is automatic finish cutting after reel pipe.
纸管长度控制随意调整。本机最大的特点是：卷管后自动精切。
3
This paper introduces the characteristics and PLC control system of rim-crimping machine for automobile silencer tube, which includes machinery, hydraulic and programmable controller technique.