H型钢表面热轧标识的生产工艺分析与改进

Analysis and improvement of production process of hot rolled identification on H-beam surface

针对H型钢表面热轧标识在生产实践过程中常出现标识轧制不出、不清晰及重叠变形等问题,借助有限元模拟软件Simufact,开展了不同工艺方案仿真分析,研究了轧辊凹槽宽度、轧制压下量、轧制温度对H型钢表面热轧标识凸出高度的影响,并提出了增加轧制压下量的改进方案。结果表明:随着轧辊凹槽宽度增加,热轧标识的凸出高度和凸出率增加,但当凹槽宽度在8 mm以上时,增加幅度很小;随着轧制压下量增加,热轧标识的凸出高度及凸出率基本呈线性增加;轧制温度对热轧标识凸出高度和凸出率的影响较小。生产实践中基于不同轧机布置形式,开发了相应工艺方案:往复穿梭式精轧机布置,在万能粗轧辊上车削凹槽,精轧机在终轧道次前2~3道次空过最后道次再参与轧制;全连续和半连续轧机布置,调整刻标识机架位置,在成品前孔上刻印标识,可以轧制出符合要求的标识,提高了产品形象。

In view of the common problems of hot rolled identification on H-beam surface in production practice,such as rolling failure,unclear and overlapping deformation,the simulation analysis of different process schemes was carried out by the finite element simulation software Simufact,and the influence of roll groove width,rolling reduction and rolling temperature on the protrusion height of hot rolled identification on H-beam surface was studied.The improvement scheme of increasing rolling reduction was put forward.The results show that the protrusion height and protrusion rate of hot rolled identification increase with the increase of groove width,but the increase amplitude is small when groove width is more than 8 mm.The protrusion height and protrusion rate of hot rolled identification increase linearly with the increase of rolling reduction.The influence of rolling temperature on the protrusion height and protrusion rate of hot rolled identification is small.In the production practice,based on different mill layout forms,the process method has been developed.The reciprocating shuttle mill layout is arranged on the universal roughing rolling roll to turn grooves,the finshing mill passes through 2-3 passes before the final rolling pass,and then participates in the rolling.The full continuous and semi-continuous mill layout are arranged to adjust the position of the stand for rolling identification,and the identification is engraved on the front hole of the finished product.The identifications that meet the requirements can be successfully rolled out,improving the product image.