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为实现复合材料层合板在一定钻削缺陷容差值内的工艺参数优化,首先利用SEM对复合材料的组织结构进行测试分析,获得了复合材料层合板的截面形貌和特征尺寸。然后进行钻削加工正交实验,测试了不同加工参数下的钻削轴向力和扭矩,对钻孔过程中产生的分层、撕裂和孔壁圆度误差等缺陷进行测量,分析了缺陷产生的机制,并对测量结果进行非线性拟合得到缺陷的变化规律。通过建立钻削缺陷与轴向力及扭矩偏差的关系,获得了轴向力和扭矩偏差的临界范围。最后以钻头的主轴转速、每转进给量及钻头结构参数中的横刃偏心系数为决策变量,以获得最大材料去除率为优化目标,以钻削缺陷容差值为约束条件,建立了复合材料钻削加工的参数优化模型。使用MATLAB软件进行工艺参数优化,在保证复合材料钻削质量的前提下,得到了能够实现最大生产效率的钻削参数。
In order to optimize the process parameters of the composite laminates under the allowable drilling tolerance, the microstructures of the composites were first analyzed by SEM, and the cross-sectional morphology and feature size of the composite laminates were obtained. Then the orthogonal experiment of drilling was carried out, the axial force and torque of drilling under different processing parameters were tested, the defects such as delamination, tearing and roundness error of hole wall during drilling were measured, Mechanism, and the results of the non-linear fitting to get the law of defects. By establishing the relationship between drilling defects and axial force and torque deviation, the critical range of axial force and torque deviation is obtained. Finally, taking the eccentricity of the chisel edge of the drill as the main shaft speed, the feed per revolution and the chisel edge parameter as the decision variables to obtain the maximum material removal rate as the optimization objective, the drilling defect tolerance value is used as the constraint condition, Parameter Optimization Model of Material Drilling. The use of MATLAB software for process parameters optimization, to ensure the quality of the composite drilling under the premise of being able to achieve the maximum productivity of the drilling parameters.