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为分析液压支架受加工尺寸精度的影响,在建立ZFS4800型液压支架三维模型的基础上,对液压支架四连杆运动规律进行求解,并提取液压支架结构参数的变量矩阵,采用全微分的方法建立了液压支架掩护梁与顶梁铰接点水平位移的误差模型。针对不同的输入角度,在MATLAB软件平台下进行仿真,实现了水平位移误差分布受各结构参数分布的影响。结果表明,该型液压支架顶梁的水平位移为24.4mm,且位移误差值受前连杆长度、后连杆长度和特征角度误差的影响最大。
In order to analyze the influence of the hydraulic support on machining dimensional accuracy, a three-dimensional model of the ZFS4800 hydraulic support was established and the movement rule of the four-link hydraulic support was solved. The variable matrix of hydraulic support structure parameters was extracted and established by the method of total differential Error Model of Horizontal Displacement of Hinged Joints Between Shield Beam and Roof Beam of Hydraulic Support. According to different input angles, the simulation is carried out under MATLAB software platform to realize the horizontal displacement error distribution affected by the distribution of each structural parameter. The results show that the horizontal displacement of the top beam of this type of hydraulic support is 24.4mm, and the displacement error value is greatly affected by the front link length, the rear link length and the characteristic angle error.