摘要
目的研究聚晶金刚石(PDC)钻头切削齿破岩过程中的温升及变形情况,确定在不同切削参数下PDC钻头单齿破岩时温升和变形的变化规律.方法利用非线性有限元仿真软件,建立了二维PDC钻头切削齿-岩石动态仿真模型,通过改变钻头切削齿破岩时的切削参数,得到了不同参数条件下切削齿温度和变形的变化规律,对切削齿破岩过程中的温升及热变形进行分析.结果切削温度在初始阶段上升较快,0. 02 s左右趋于平稳,同时切削深度对温度的影响最大;温度的升高以及切削力的变大,会使切削齿的变形增大.结论在PDC钻头单齿破岩的过程中,PDC切削齿的温度变化与其切削深度、切削速度以及齿前角密切相关.切削深度对其温度的影响较为明显.与所受的切削力相比温度对切削齿的变形影响较为明显.
The purpose is to study the temperature rise and deformation during the rock cutting of the polycrystalline diamond Compact bit(PDC),and to determine the variation of temperature rise and deformation of the PDC bit with single tooth breaking under different cutting parameters.A two-dimensional PDC bit cutting teeth-rock dynamic simulation model was established based on nonlinear finite element simulation software.The variation of temperature and deformation of the cutting teeth under different parameters was obtained by changing the cutting parameters of the bit cutting teeth,and the temperature rise and thermal deformation were analyzed during cutting rock cutting process.As a result,the cutting temperature rises quickly at the initial stage and tends to be stable at about 0.02 s.At the same time,the depth of cut has the greatest effect on the temperature.The deformation of cutting teeth is increased with the increase of temperature and the cutting force.The temperature change of PDC cutting teeth is closely related to its cutting depth,cutting speed and rake angle in the process of single tooth rock breaking with PDC bits.The depth of cut has a significant effect on its temperature.And the temperature has more significant effect on the deformation of the cutting teeth than that of the cutting force.
作者
张丽秀
申强
张珂
魏春雨
ZHANG Lixiu;SHEN Qiang;ZHANG Ke;WEI Chunyu(School of Mechanical Engineering,Shenyang Jianzhu University,Shenyang,China,110168)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2018年第5期912-920,共9页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51375317)
辽宁省科技创新重大项目专项计划(201506003)
住房和城乡建设部科学技术项目(2015-K3-009)
关键词
PDC切削齿
破岩
温升
变形
有限元
PDC cutting tooth
rock-breaking
temperature rise
deformation
finite element
