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本文采用有限元法模拟硬质合金轧辊轧制螺纹钢的过程,研究了轧辊孔型参数对轧制过程的影响,并通过现场轧制实验验证数值模拟的结果。结果表明:轧制规格Φ12 mm螺纹钢过程中,成品前孔采用单椭孔型时,轧件X轴、Y轴、Z轴的最大轧制应力分别为672 MPa、730 MPa、661 MPa,而成品前孔采用平椭孔型时,其X轴、Y轴、Z轴的最大轧制应力分别为731 MPa、855 MPa、815 MPa;X轴、Y轴、Z轴的最大轧制应力分别提高为8.7%、17.1%、23.2%。而在两种轧制条件下,硬质合金轧辊螺纹轧槽内的温升基本相同,最高温度约300℃,而轧制平椭轧件时轧槽的高温区域较多,这是由于在两种轧制条件下塑性变形程度的不同造成。通过现场轧制实验,采用牌号为YGR55的硬质合金轧辊轧制规格Φ12 mm螺纹钢,成品前孔为平椭孔型时,硬质合金螺纹轧辊的单槽过钢量约700吨,而成品前孔为单椭孔型时,其单槽过钢量超过1 200吨。同时表明,有限元数字分析模型能为硬质合金轧辊设计、使用起到重要的参考作用。
In this paper, the finite element method was used to simulate the rolling process of cemented carbide rolls. The effect of roll pass parameters on the rolling process was studied. The numerical simulation results were verified by field rolling experiments. The results show that the maximum rolling stress in the X, Y and Z axes of the rolled products with Φ12 mm rebar is 672 MPa, 730 MPa and 661 MPa, respectively. The maximum rolling stress in the X, Y and Z axes is 731 MPa, 855 MPa and 815 MPa, respectively. The maximum rolling stress of the X, Y and Z axes is increased 8.7%, 17.1%, 23.2%. However, under the two rolling conditions, the temperature rise in the groove of the cemented carbide roll groove is basically the same with a maximum temperature of about 300 DEG C, while the high temperature region of the groove during the rolling flat oval rolling is more, Different types of rolling conditions caused by the degree of plastic deformation. Through on-site rolling experiments, the specifications of Φ12 mm rebar were rolled with cemented carbide rolls of grade YGR55. When the front hole of the finished product was a flat oval hole type, the single-pass over-flow of the cemented carbide thread roll was about 700 tons, For a single-hole type, the single-tank over steel volume of more than 1,200 tons. At the same time, it shows that the finite element numerical analysis model can be an important reference for the design and application of carbide rollers.