铝热轧机板坯的厚度反馈式液压自动控制  

Auto-hydraulic control system with thickness feedback on hot rolling mill for aluminum strip rolling

作　　者：孙培明[1] 魏协奔[1] 陈树钦 

机构地区：[1]揭阳职业技术学院机电系,广东揭阳522000 [2]揭阳市大立模具厂有限公司,广东揭阳522000

出　　处：《轻合金加工技术》2013年第8期33-36,40,共5页Light Alloy Fabrication Technology

基　　金：广东省2010年科技计划项目(粤科规划字[2010]170号文);项目编号(2010121)

摘　　要：介绍Φ550 mm二辊式铝热轧机压下系统的厚度反馈式液压自动控制方法。设计厚度反馈式液压AGC系统,采用测厚仪直接检测板厚变化并反馈,在厚差运算器计算出板厚偏差所需的辊缝调整量,应用于最后轧制阶段的压下道次,实现板厚实时控制,显著提高板厚尺寸精度;系统采用压力闭环和位置闭环控制,实现热轧压下的"恒压力"和"恒辊缝"控制;系统的液压控制采用设置带压差继电器的高精度过滤器、油压蓄能器和压力继电器等设备,具备油污染报警、抑制压力零漂移、最低和最高供油压力控制等功能。该系统具有控制精度高、响应速度快、稳定性好等特点,能显著提高板坯质量,降低废品率和能耗。The auto-hydraulic control with thickness feedback system on ~550 mm duo hot rolling mill for aluminum strip rolling has been introduced. An auto-hydraulic gauge control （AGC） system with thickness feedback has been designed. The thickness can be detected di- rectly by AGC and feedback unit. The thickness variation being computed by arithmetic unit can be used for roll gap adjustment and laying down the rolling passes for the next hot roll- ing. This system can achieve real-time thickness control and increase thickness accuracy sig- nificantly. The screw up unit of the duo hot rolling mill reaches to ＂constant pressure＂ and ＂constant roll gap＂ control by using of pressure loop and position loop. The hydraulic control system possesses the capability of oil pollution alarm, zero drift of pressure control, lowest and highest oil pressure control, because it is constructed from high accuracy pressure filter with pressure variation relay, hydraulic pressure accumulator and pressure relay. The charec- toristics of this system are high control precision, fast response and excellent stability. The application of the system can improve the strip quality significantly, decrease rejection rate and saving energy.

关 键 词：液压自动控制 液压AGC系统 铝热轧机 液压控制系统 厚度反馈式 

分 类 号：TG339[金属学及工艺—金属压力加工]