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运用DEFORM-3D软件,模拟了液压滚切剪上剪刃的剪切速度分别为50mm·s~(-1)、75mm·s~(-1)、100mm·s~(-1)、125mm·s~(-1)、150mm·s~(-1)、175mm·s~(-1)情况下的剪切过程,分析了剪切速度对剪切后的钢板断面质量、剪切力及剪切后钢板应力分布的影响,并通过现场实验设定不同的剪切速度对钢板进行剪切,模拟和实验的结果一致,表明当剪切速度在50mm·s~(-1)~100mm·s~(-1)时剪切后的钢板断面质量随剪切速度的增加而越来越好,等效应力的分布情况从比较不规则分散的状态变为均匀集中的状态,当剪切速度在125mm·s~(-1)~175mm·s~(-1)时剪切质量随剪切速度的增加而越来越差,等效应力的分布开始变得不均匀,此外,随着剪切速度的增加剪切钢板所需的剪切力随之增加,其主要原因是剪切速度与钢板的变形抗力成正比,但其增加的幅度不是很大。若仅从剪切速度角度考虑,在其他条件不变的前提下最佳剪切速度为100mm·s~(-1)。
Using DEFORM-3D software, the shear velocities of 50mm · s ~ (-1), 75mm · s ~ (-1), 100mm · s ~ (-1), 125mm · s -1, 150 mm · s -1 and 175 mm · s -1, the effects of shear rate on the quality of the cut steel plate, the shear force and the shear strength were analyzed. After cutting, the influence of stress distribution on the steel sheet is analyzed. The shear rate of the steel sheet is set by field experiments. The results of simulation and experiment are consistent. It shows that when the shear rate is between 50mm · s -1 -100mm · s ~ (-1), the section quality of the cut steel plate becomes better and better with the increase of the shear rate. The distribution of the equivalent stress changes from an irregularly dispersed state to a uniformly concentrated state. When the shear rate is in the range of When the shear rate increases from 125mm · s -1 to 175mm · s -1, the distribution of the equivalent stress becomes uneven. In addition, with the increase of the shear rate, The increase of the speed The shearing force required to shear the steel plate increases. The main reason is that the shearing speed is proportional to the deformation resistance of the steel plate, but the increase is not large. If only considering the shear rate, the best shear rate is 100mm · s ~ (-1) under the condition that the other conditions are not changed.