摘 要:推钢机是轧钢车间上料区主要设备之一，其作用是将加热炉前辊道上的钢坯或炉前上料台架上的钢坯推入加热炉进行加热过程。推钢机的种类分为齿条式推钢机，液压式推钢机，螺旋式推钢机，曲柄连杆式推钢机。根据中小型轧钢车间使用的经验，一般推力在0.2MN以上时，一般采用齿条式推钢机较适宜。因为齿条式推钢机传动效率高，使用可靠等优点。本文选用了机械式推钢机，在推钢机结构设计上主要采用了齿轮齿条的结构形式，即采用齿条式推钢机。主要对推钢机进行了方案选型、结构设计、强度计算三个方面进行了详细说明。还介绍了在设计、制造、安装和使用过程中应注意的问题。

关键词： 推钢机 齿条式 推杆 齿轮齿条

ABSTRACT:Pushing steel-rolling workshop is based on one of the main equipments─Pusher-machine, and its role is to push the billet material which lies on the Roller or the bench before the furnace into the furnace for reheating process. Push the kinds of steel machine into rack type pushed steel machine, hydraulic type pushed steel machine, spiral pushed steel machine, crank connecting type pushed steel machine. According to the experience of steel rolling workshop use small, general thrust in more than 0.2 MN, use commonly rack type pushed steel machine is suitable. Because rack type pushed steel machine of high transmission efficiency, reliable operation, etc.The design chooses a mechanical pusher- machine,while the structure designed primarily for the use of ngth calculation．The rack type pusher designed by Chongqing Steel is in goodcondition．As well as the issues which should be paid attention to during the design ，manufthe gear and rack structure. The main content of the pusher of  Steel medium plate plant has been detailedly described in three aspects oftype selection plan，configuration design and streacture，installation and applicationhave been described．As well as the issues which should be paid attention to during the design ，manufacture，installation and application have been described．

Keywords: pusher；rack type；push rod；gear rack