截线间距与截齿截深的比值对截齿截割力的影响  

Effect of Ratio of Intersecting Distance to Cutting Depth of Pick on Cutting Force of Pick

作　　者：逯振国 李长江 王洪斌 王志文 LU Zhenguo;LI Changjiang;WANG Hongbin;WANG Zhiwen(College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590

出　　处：《煤炭技术》2022年第2期203-205,共3页Coal Technology

摘　　要：为了研究截齿在破岩过程中的截割力,进一步提升截齿截割效率,用SolidWorks建立了截齿截割岩石的三维模型,使用HYPERMESH对模型进行网格划分,利用ANSYS/LS-DYNA动态仿真软件,建立了截齿破岩三维有限元模型,采用Holmquist-Johnson-cook(HJC)模型对岩石材料进行了数值模拟,研究了切削厚度分别为2.5、5、7.5 mm时,不同截齿中线间距所对应的截线间距与截齿截深的比值对截齿截割力的影响,结果表明:改变截线间距来改变截线间距与截齿截深的比值时,截齿所受的截割力会产生波动,不同的截齿截深所造成的截齿最小作用力对应的比值不同;同时,截齿截深所影响的截齿作用力在实验中占较大一部分,因此,在合适的截齿截深的条件下,合理改变截线间距与截齿截深的比值可以有效减少截齿所受的截割作用力,提高截齿的寿命。In order to study the cutting force of the pick in the process of rock breaking and further improve the cutting efficiency of the pick,a three-dimensional rock cutting model of the pick was established by SolidWorks in this paper,and the mesh of the model was divided by HYPERMESH.A three-dimensional finite element model of rock breaking of the pick was established by ANSYS/LS-DYNA dynamic simulation software.The Holmquist-Johnson-Cook(HJC)model was used to simulate the rock material,and when the cutting thickness was 2.5,5 and 7.5 mm,The influence of the ratio of the middle line spacing to the cutting depth of the pick on the cutting force of the pick when the middle line spacing of the pick is different,respectively is shown as follows:When changing the ratio between the cutting line spacing and the cutting depth of the pick,the cutting force received by the pick will fluctuate,and the ratio of the minimum force caused by different cutting depth of the pick is different.At the same time,the picking force influenced by the cutting depth of the picking teeth accounts for a large part in the experiment.Therefore,under the condition of appropriate cutting depth of the picking teeth,reasonable change of the ratio between the cutting line spacing and the cutting depth of the picking teeth can effectively reduce the cutting force suffered by the picking teeth and improve the service life of the picking teeth.

关 键 词：截齿 截线间距 截深 截割力 

分 类 号：TD42[矿业工程—矿山机电]