截楔刀齿振动切削破岩载荷特性的数值模拟

详细信息    查看全文 | 推荐本文 |

英文篇名：Numerical Simulation of Rock Breaking Load Characteristics of Wedge Cutter Teeth in Vibration Cutting 作者：那洪亮 ; 张艳军 ; 李德根 英文作者：Na Hongliang;Zhang Yanjun;Li Degen;School of Mechanical Engineering,Heilongjiang University of Science and Technology;Heilongjiang University of Science and Technology; 关键词：截楔刀齿 ; 等效半径 ; 应力分布 ; 载荷特性 英文关键词：wedge cutter tooth;;equivalent radius;;stress distribution;;load characteristic 中文刊名：煤矿机械 英文刊名：Coal Mine Machinery 机构：黑龙江科技大学机械工程学院;黑龙江科技大学; 出版日期：2019-06-15 出版单位：煤矿机械 年：2019 期：06 基金：国家自然科学基金项目(51674106;51274091);; 黑龙江科技大学研究生创新科研资金项目(YJSCX2018-101HKD) 语种：中文; 页：21-23 页数：3 CN：23-1280/TD ISSN：1003-0794 分类号：TD421.5

摘要

为研究碟盘刀具在轴向振动和径向切削复合破岩过程中应力的分布情况及载荷特性,以单个截楔刀齿作为等效分析对象,采用ABAQUS软件建立截楔刀齿等效模型,模拟刀齿破岩过程,分析不同结构下刀齿的应力云图和载荷曲线。结果表明:齿尖部分所受应力远大于齿体部分,且齿体与齿尖所受应力最大值均与刀齿楔面角度正相关;楔入深度增加,应力分布区域由齿体向齿尖处集中。径向载荷的峰值和均值均与齿尖等效半径正相关,且大于轴向载荷的峰值和均值;轴向向下载荷峰值与等效半径正相关,向上载荷峰值和径向载荷均值则负相关;轴向载荷均值受等效半径影响较小。该研究为新型破岩刀具的设计提供了理论依据。
        In order to study the stress distribution and load characteristics of the disc cutter in the process of coal and rock crushing by axial vibration and radial cutting. Taking a single wedge cutter tooth as the equivalent analysis object, the equivalent model of the disc wedge cutter tooth was established by ABAQUS software to simulate the process of breaking coal and rock with the cutter tooth, and the stress cloud picture and load curve of the cutter tooth under different structures were analyzed. The results show that the stress on the tip part is much greater than that on the tooth body,and the maximum stress on the tooth body and the tip is positively correlated with the wedge angle of the cutter tooth; with the increase of wedge depth, the stress distribution area concentrates from the tooth body to the tip.The peak value and average value of radial load are positively correlated with the equivalent radius of tooth tip,and are larger than the peak value and average value of axial load. The axial downward load peak value is positively correlated with the equivalent radius,while the upward load peak value is negatively correlated with the radial load average value. The average axial load is less affected by the equivalent radius. This study provides a theoretical basis for the design of new rock cutting tools. This study provides a theoretical basis for the design of new rock cutting tools.

引文

[1]刘春生,袁昊,张艳军,等.不同楔面角度碟盘刀具切削煤岩的载荷与小波能量熵[J].黑龙江科技大学学报,2018,28(5):543-551.
    [2]刘春生,徐玉芸,袁昊,等.碟盘刀具振动与切削破碎煤岩力学特性的数值模拟[J].黑龙江科技大学学报,2018,28(1),36-42.
    [3]刘春生,徐玉芸,李德根,等.碟盘刀齿冲击与切削复合破碎煤岩的载荷特性[J].黑龙江科技大学学报, 2017,27(2):97-103.
    [4]刘春生,徐玉芸,李德根,等.边缘牙齿形碟盘破碎煤岩的力学机理及其模型[J].煤炭学报,2018,43(1):272-279.
    [5]宋胜伟,高修林.刀头几何角度对刀型截齿力学特性的影响[J].黑龙江科技大学学报,2015,25(3):304-310.
    [6]李晓豁,李婷,焦丽,等.滚筒式采煤机截齿受力的模拟研究[J].广西大学学报(自然科学版),2018,43(2):437-443.