材料期刊网

在线调宽技术是热连轧生产过程中实现连铸与连轧之间板坯宽度上衔接的关键技术。目前,该技术在我国仍需技术引进,且使用中存在一定的盲目性。文中对2250 mm 热轧线SMS定宽机侧压模块进行了机构分析,采用矢量法建立了侧压机构运动的数学模型并应用 MATLAB软件进行了运动学分析。侧压模块为双驱动二自由度九杆Ⅲ级机构,根据结构特点,可简化为曲柄滑块机构进行运动分析；锤头侧压方向的位移、速度、加速度随时间t按近似正弦曲线变化,均为非线性曲线；锤头侧压方向单侧最大行程达到160.228 mm,侧压正方向最大速度为351.8584 mm/s,侧压方向最大加速度为1632.2 mm/s2。结果表明：锤头侧压模块能实现单侧175 mm的最大侧压量要求；曲柄在247°~357°范围内运行时锤头对板坯进行侧压效果好；利用 MATLAB对侧压过程进行运动模拟分析,避开各构件具体结构而得到了机构运动的解析解,为进一步分析相关参数的影响及进行优化设计提供方法。

On-line slab width reducing technology is the key technology to realize the continuous production process of continuous casting and rolling.At present,the technique in China still needs to be introduced,and there is some blindness in its use.The side press mechanism of SMS slab sizing press (SSP)of 2 250 mm strip production line was studied,the motion mathematical model of side press mechanism was established with vector method,and motion analysis was done with MATLAB software.The side press mechanism is a two-drive two-freedom nine-bar grade Ⅲ mechanism and can be simplified as slider-crank mechanism to analyze the motion state of the die accord-ing to the structural characteristics.The displacement,velocity and acceleration change approximately by sine curve with time (t),and they are nonlinear curves.The maximum round trip of each side can reach 160.228 mm along side press direction,the maximum velocity of stroke is 351.858 4 mm/s,and the maximum acceleration is 1 632.2 mm/s2 .The results show that the width reducing quantity of each side can reach 175 mm;the effect of side press is good during the crank running from 247°to 357°;motion simulation analysis of side pressing process with MATLAB avoids concrete structure and obtains the analytical solution of the mechanism motion,which pro-vides a good method to analyze the effects of related parameters and optimize design.