双动铝挤压机液压固定针技术的实现  

Application of hydraulic fixed-mandrel technology on double action extrusion press

作　　者：丁建文[1] 杨涛[1] 郑守东 DING Jian-wen;YANG Tao;ZHENG Shou-dong(China National Heavy Machinery Research Institute Co.,Ltd,Xi'an 710032,China;Liaoning Zhongwang Machinery Equipment Manufacturing Co.,Ltd.,Liaoyang 115000,China)

机构地区：[1]中国重型机械研究院股份公司,陕西西安710032 [2]营口忠旺机械设备制造有限公司,辽宁辽阳115000

出　　处：《重型机械》2019年第1期22-24,共3页Heavy Machinery

摘　　要：文章介绍了液压固定针挤压的机械结构、液压固定针挤压工艺及液压固定针的液压原理,提出了一种在实际应用中更易实现的采用PID闭环反馈控制的液压定针控制方式;根据测量的穿孔针偏移量,应用PID算法对定针偏差和挤压速度进行拟合,通过将拟合结果转化为高频响应阀的控制信号以实现对穿孔缸进液量的精确调整,进而控制穿孔针的位置在误差范围内。The mechanic structure,hydraulic fixed-mandrel process and hydraulic principle of the hydraulic fixed-mandrel extrusion process were introduced in this paper.A PID closed loop feedback control method is adopted to control hydraulic fixed-mandrel.According to measuring the offset of the mandrel,the fixed needle deviation and the extrusion speed were fitted based on PID algorithm.the fitting result was translated into control signal of the high-frequency response valve to realize precise adjustment infusion volume of perforated hydraulic cylinder,which the mandrel position is kept within the error range.

关 键 词：液压定针 铝挤压机 电液控制 

分 类 号：TG375[金属学及工艺—金属压力加工]