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针对某轧钢厂650轧机3架横列式,在轧制Φ80~Φ160 mm圆钢时,需要向第2架、第3架轧机提供120,140,150,160和170方等坯料,因此,第1架轧机需要频繁更换轧辊用以改变孔型。当生产合同量小时,换辊频繁会严重影响生产效率。采用的优化设计方案为:由第1架650轧机提供大方坯料160方经过第2架轧机的Φ125~Φ130 mm圆万能孔型中的扁箱孔、立压孔后,进入Φ115~Φ120 mm圆料万能孔型中的扁孔型、立压孔型和椭圆孔型,最后再进入第3架轧机轧制成材。通过轧机孔型优化设计的理论验证与生产试验,证明了新孔型系统可行,可以提高生产效率并降低工人的劳动强度。
In the rolling mill of Φ80 ~ Φ160 mm round bars, there are 3 rows of 650 rolling mills for a rolling mill, and the billets 120,140,150, 160 and 170 need to be supplied to the second and third rolling mills. Therefore, the first rolling mill needs frequent replacement of the rolls To change the hole type. When the production contract is small, changing the roller frequently will seriously affect the production efficiency. The optimal design adopted by the first 650 rolling mill is as follows: the square billet in the Φ125 ~ Φ130 mm circular hole of the second rolling mill after the square billet of 160 square mill is pressed into the Φ115 ~ Φ120 mm round hole Flat hole in the universal hole type, vertical pressure hole and oval hole type, and finally into the third mill rolling timber. Through the theoretical verification and production test of optimal design of pass hole of mill, the new pass system is proved to be feasible, which can improve the production efficiency and reduce the labor intensity of workers.