IX |
产品形状和成材率改进 |
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编号 |
项目名称 |
项目介绍 |
客户 |
91 |
在后部道次调整弯辊和轧制力沿道次分布,降低钩形和镰刀弯,改善板型控制 |
Several C++ subroutine [子程序] that calculated the work roll [工作辊] bending [弯辊]
[工作辊弯曲] for each pass [道次] were used to achieve slightly long centers. The
bending [弯曲] subroutine [子程序] also calculated the adjustments [调整] of bending
[弯曲] during the dynamic [动态] changes in the force [轧制力]. The level 1 approach to
dynamic [动态] adjustments [调整] of bending [弯曲] during the pass [道次] was reviewed
and corrected for problems of gain or response. Code to ramp the roll [轧辊]
bending [弯辊] in level 1 on the head and tail to avoid reaching the upper [高端]
limit of the roll [轧辊] bending [弯辊] and maintain [维护] good shape [形状] was also
provided. The ramping of the roll [轧辊] bending [弯辊] for thermal changes in the
crown [凸度] during the first 15 seconds of reversing pass [道次] was recommended
[建议]. The centerline [中心线] gage [厚度] was often used to track the progress of the
effect on the hook and camber [镰刀弯]. The operator [操作工] were trained to learn to
setup and adjust the steering [手工调控] better. |
Bethlehem, OSM, Ipsco, Nanjing, SMC |
92 |
调整轧制力分布和弯辊以减少边侧波和中心波 |
This work used the same tools and adjustments [调整] described above in item
91. There were edge [边侧] and center wave [中心波浪] measuring tool [测量工具] that could
be used to provide feedback [反馈] to operator [操作工] and the level 1 and 2. |
Bethlehem, OSM, Ipsco, Nanjing |
93 |
在后部道次降低向下勾头而导致的错过插槽,扭结,蛇头弯或其他缺陷。 |
Literature [文献]
reference [文献参考] on the effects of the differential speed [速度] between the top
and bottom rolls [辊] were used to provide guidance on head end delta speed [速度].
The percentage differences in speed [速度] and the length of the sustained
differences to avoid turn down [向下勾头] were recommended [建议]. Both positive and
negative differences, depending on the thickness and the reduction [压下率] of the
pass [道次], were recommended [建议]. The tools to measure [测量] the turn down [向下勾头]
and ways to store and use the measurement [测量] to minimize the problem on
specific products were recommended [建议]. |
OSM, Nanjing, Allegheny Ludlum |
94 |
通过冷热矫直机设置以减少波浪和弓形 |
Models [模型] for retained
strain [残余应变] after roll [轧辊]er leveling [辊式矫直] were used to set up the
leveling. Gap setting [设定] to maximize flatness [平整度] without exceeding the
limits of leveler were recommended [建议]. The level 1 and Level 2 [二级系统] software
[软件] to perform the correct setting [设定] was tuned and adjusted. |
Bethlehem, Nanjing |
115 |
南钢中厚板轧机头和尾部的质量改进 |
This project is to reduce NISCO [南钢] plate [中板] mill head-end [头部] and
tail-end [尾部] camber [镰刀弯]. When there is high error [误差] in the head-end [头部]
or tail-end [尾部] force [轧制力] prediction [轧制力预报], the calculated initial [初始]
roll [轧辊] gap [辊缝] will be inaccurate. AGC has to move in a big scope to adjust
the roll [轧辊] gap [辊缝]. In this process, any weakness in the mill control and
operation may trigger significant head-end [头部] and/or tail-end [尾部] defects
[缺陷]. Therefore, the first attempt would be the force [轧制力] model [轧制力模型]
Improvement [改进] in this aspect. In addition, based on the Parameter [参数]
variation in the head-end [头部] and tail-end [尾部], thickness gradient [厚度梯度] will
be created in the two ends, in order to achieve the equal thickness throughout
the length. NISCO [南钢]^s Level 1 system [系统] from Siemens doesn^t have
sufficient features for head-end [头部] and tail-end [尾部] to coordinate [坐标] with
the Level 2 [二级系统], so both Level 1 and Level 2 [二级系统] should be improved. |
N anjing |