不同楔入角的镐齿破岩截割力模型与仿真  

Development and simulation of cutting force model on conical pick cutting rock at different wedge angles

作　　者：刘春生[1] 宋杨[1] 

机构地区：[1]黑龙江科技学院机械工程学院,哈尔滨150027

出　　处：《黑龙江科技学院学报》2012年第3期277-281,205,共5页Journal of Heilongjiang Institute of Science and Technology

基　　金：国家自然科学基金项目(51074068);黑龙江省国际科技合作重点项目(WB01104)

摘　　要：为探求镐型截齿不同角度楔入岩石时,与岩石相互作用和截割力定量的关系,以达到截齿高效率、低能耗截割岩石的目的,在镐齿截割岩石力学模型的基础上,结合截齿不同楔入角截割岩石的实际工作状态,对镐型截齿的受力状态进行分析。确定截齿不同楔角截割岩石时的应力分布,建立镐型截齿的截割力数学模型。给出了楔入角、截齿半锥角的变化对截齿截割力的影响规律,并进行了仿真实验。结果表明:楔入角、半锥角之和小于90°的范围内,截割力呈非线性的变化特征。该研究建立的截割力学模型可靠,数学描述简便,可以为截割理论研究与采煤机设计提供理论依据。Aimed at investigating the quantitative relationship between different angles at which conical picks wedge rock and rock interaction, the cutting force in order to allow conical picks to work on rocks with a greater efficiency and lower energy consumption, this paper presents an analysis of the stress state of conical pick, based on the mechanics model of conical pick cutting rock and combined with actu- al working conditions in which conical picks work on rocks at different wedge angles. The paper introduces the determination of the stress distribution of conical pick cutting rock at different wedge angles, development of the cutting force mathematical model, the description of the law governing wedge angle and half cone angle on the effect of cutting force and changing trend and regularity, and the simulation. The results indicate that, where sum of the wedge angle and half cone angle is less than ninety degrees, cutting force assumes nonlinear variation characteristics. The cutting mechanics model marked by a greater reliability and the more simple mathematical description promises as a theoretical basis for cutting the- oretical research and shearer design.

关 键 词：镐型截齿 楔入角 应力分布 截割力模型 

分 类 号：TD421.61[矿业工程—矿山机电]