A structure for four-high rolling mill to avoid uneven stress of roll channeling is introduced. The working rolls are assembled on the mill stand. The two ends of each working roll are supported by bearings installed in the bearing box. The two sides of the bearing box on the operating side of each working roll are respectively connected with the moving blocks on the operating side, and the moving blocks on the operating side are connected with the oil cylinder of the roll channeling by a pin sleeve. The structure of the piston rod also includes a thin diameter damping oil pipe, one of which connects the rod cavity of the roll channeling oil cylinder located on both sides of the same work roll, and the other one connects the rod cavity of the roll channeling oil cylinder located on both sides of the same work roll. Using the utility model, the control valve is closed during roll channeling and opened during rolling, so that when the work roll produces an axial force, the pulling (pushing) force of the two roll channeling cylinders on the operating side of the work roll is equal, thus the pin sleeve clearance of the two cylinders connecting the moving blocks is basically equal, and the offset of the bearing box of the work roll is avoided. The bearing is not concentric with the work roll, which causes the bearing damage accident.
【技术实现步骤摘要】
一种用于四辊轧机避免轧机窜辊受力不均的结构
本技术涉及一种轧钢设备,特别是用于四辊轧机避免轧机窜辊受力不均的结构。
技术介绍
冶金热轧钢行业中,精轧机组中使用较为普遍的当属四辊轧机,轧机中有上下两个支撑辊和上下两个工作辊,如图2所示。为了使工作辊的使用寿命更长,在每轧制一块钢后,需要将上下工作辊相互窜动,变化轴向相对位置,以此降低带钢在同一位置对工作辊的磨损。带动工作辊作轴向移动的部件为窜辊油缸,即:每个工作辊由位于其两侧的两个窜辊油缸推、拉动工作辊做轴向移动,每架轧机共有四个窜辊油缸。在轧钢间歇的时候,窜辊油缸通过一组销套带动移动块并带动工作辊作轴向移动,轧钢时窜辊油缸又通过销套来约束工作辊不能轴向移动。工作辊主动窜辊时的方向是:上辊向前,下辊向后,当窜辊至极限位置后,再反方向窜动,如此一来,油缸的连接销套受到交变力的作用,销套磨损,并出现间隙。若同一工作辊两侧的油缸销套受力相等则间隙量也相等的话,对工作辊无太大影响,但多数情况下很难保证同一工作辊两侧窜辊油缸受力相等,因此会使两侧的油缸销套的间隙不相等,这样会造成轴承箱发生偏移,如图3所示,图中双点划线位置是正 ...
【技术保护点】
1.一种用于四辊轧机避免轧机窜辊受力不均的结构,包括上下对应装配在轧机机架(1)上的工作辊(8),各工作辊的两端由安装在轴承箱内的轴承支撑,各工作辊操作侧轴承箱(3)的两侧分别连接操作侧移动块(2),各操作侧移动块分别经销套(7)连接窜辊油缸(4)的活塞杆,其特征在于:还包括细径阻尼油管(5),一根细径阻尼油管将位于同一工作辊两侧的窜辊油缸的有杆腔连通,另一根细径阻尼油管将位于同一工作辊两侧的窜辊油缸的无杆腔连通。
【技术特征摘要】
1.一种用于四辊轧机避免轧机窜辊受力不均的结构,包括上下对应装配在轧机机架(1)上的工作辊(8),各工作辊的两端由安装在轴承箱内的轴承支撑,各工作辊操作侧轴承箱(3)的两侧分别连接操作侧移动块(2),各操作侧移动块分别经销套(7)连接窜辊油缸(4)的活塞杆,其特征在于:还包括细径阻尼油管(5),一根细径阻尼油管将位于同一工作辊两侧的窜辊油缸的有杆腔连通...
【专利技术属性】
技术研发人员:杨振海,田书亚,马强,牛跃威,
申请(专利权)人:德龙钢铁有限公司,
类型:新型
国别省市:河北,13
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