【作者】 吴兰艳；

【导师】 周哲波；

【作者基本信息】 安徽理工大学 ， 机械制造及其自动化， 2010， 硕士

【摘要】 本文以纵轴式掘进机镐型截齿的截割机理为研究对象,建立了截割头和掘进机坐标系的数学模型,在此基础上对截齿的轨迹、单齿截割量以及动静态参数进行了分析和模拟,结合计算机辅助分析和设计软件对掘进机截割头的截齿分布以截割量相等为目标进行了优化设计。在已建的掘进机整机数学模型的基础上,通过Matlab软件对其运动轨迹进行求解,给出了掘进机在横摆截割时,位置坐标求解的简化算法,并通过对比验证了简化算法具有较高的精度,可以满足矿井破岩作业的要求。建立截割头破岩的数学模型,利用积分方法并借助计算机进行辅助计算,定量地计算出截割头上每一截齿在切割过程中的破岩体积,同时以所有截齿等寿命为设计目标确定截齿的布置。在此前提下,作者认为每齿在工作过程中必须遵从每齿在单位工作循环周期内的截割煤岩体积即截割量相等,且其受到破岩的工作反力最小。截齿的安装位置决定了截齿工作的应力分布,利用SolidWorks/COSMOS软件对单齿工作时的受力状况进行分析和模拟,以截齿所受应力最小为目标来优化截齿的安装姿态参数。动态工作角度也影响着截齿的截割量,其中截割角与截割后角对截割量的影响较大,截割角与截割后角成线性关系,两者的变化趋势相同。本文对截齿的动态工作角度的表达式进行了推导,并利用LabVIEW和Matlab联合编程对镐型截齿动态截割角的变化进行了仿真。图60表5参58更多还原

【Abstract】 In this paper, coordinate systems of cantilever-type roadheader and the cutting head were established based on cutting mechanism of the cantilever-type roadheader conicial bits. the trajectory, volume cutting by one bit, dynamic and static parameters of bits were analyzed and fitted based on the coordinate systems, cutting head bits distribution were optimized for equal cutting volume of all bits by computer-aided analysis and design software.The trajectory of roadheader bits were calculated based on the built roadheader mathematical model by matlab software. The simplified algorithm of bits swing trajectory were given, and proved to be able to meet the requirements of the mine rock-breaking with high accuracy by comparing the error between the original algorithm and the simplified algorithm. The mathematical rocks cutting model of cutting head were established, solved by computer using calculus. Rock volume cutting by one bit in the work process were quantitatively calculated, and bits distribution was designed to make rocks volume cutting by all bits equaled. On this premise, the author believes that every bit should make the rock volume cutting by all bits in a work period equal, and its work force minimal. The installation angle of bit determines its stress distribution when working, the SolidWorks/COSMOS software was used for analying and simulating bit’s work force to adjust the installation angle to minimize the stress on bit. Dynamic working angles also affect the cutting rock volume, in which cutting angle and clearance angle have a greater impact. They have the same trend as linear relationship between them. The expression of cutting angle was derived in this paper, and the simulation curve was plotted by joint programming with Lab VIEW and Matlab.Figure 60 Table 5 Reference 58更多还原