55MN双动正向铝挤压机中固定穿孔针挤压控制

Control of fixed mandrel extrusion in 55MN double-action forward aluminum extrusion machine

双动铝挤压机生产无缝管材对设备固定穿孔针的控制精度要求极高,具有响应快、精度高及自动化程度高等特点。本文介绍了55MN双动铝挤压机中定针部分的液压系统的设计,并进行了较全面的定针控制PLC控制方案设计,通过STEP7软件配置硬件组态和编程。该系统已应用于实际生产,定针控制精度≤1mm,完全满足工艺要求,表明PLC定针控制方案可以达到液压系统要求。

Based on the 55MN double-action aluminum extrusion machine, the hydraulic system of fixed mandrel has been introduced in the text. More comprehensive PLC control program for fixed mandrel has been designed, and the hardware constitution ＆ programming have been allocated through the STEP7 software. This system had been used in the practical production. The mandrel control accuracy is not more than lmm, which can fully satisfy the process requirement. It is shown that the PLC fixed mandrel control scheme can achieve the requirements of the hydraulic system.