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目的:以硬质合金材料的精密磨削加工为对象,探索机床-工艺之间的交互作用,构建多颗磨粒磨削模型和机床模型,通过两个模型之间参数传递与交互耦合仿真,实现对机床-工艺交互作用的预测。方法:1.根据金刚石砂轮形貌构建磨粒位姿随机分布的虚拟砂轮,建立多颗磨粒磨削模型,对新模型的磨削力预测进行实验验证;2.建立机床模型,特别是主轴-砂轮模型,并通过刚度试验;3.将磨削模型的磨削力与机床模型的砂轮变形作为交互参数实现机床-工艺之间的交互作用仿真。结论:1.构建的多颗磨粒模型可以实现磨削力预测;2.构建的机床模型可以模拟机床结构刚度;3.机床产生的变形与磨削力之间存在显著的交互作用,文中提出的有限元耦合仿真法可以实现预测机床-工艺的交互作用。
OBJECTIVE: To study the precision grinding process of cemented carbide materials, to explore the interaction between machine tool and process, to build multiple abrasive grinding models and machine tool models. Through parameter transfer and interaction coupling simulation between two models, Realize the prediction of machine tool-process interaction. According to the morphology of the diamond wheel, a virtual grinding wheel with random distribution of the grain positions is constructed to build multiple abrasive grain grinding models and to verify the grinding force prediction of the new model. (2) The machine tool model, especially the spindle - Grinding wheel model, and through the stiffness test; 3. The grinding force of the grinding model and the wheel deformation of the machine tool model as an interactive parameter to achieve the machine-tool interaction simulation. The conclusions are as follows: 1. The multi-abrasive model can realize the prediction of grinding force.2. The constructed machine model can simulate the stiffness of the machine tool structure.3. There is a significant interaction between the deformation and grinding force produced by the machine tool. The finite element coupled simulation method can predict the machine tool-process interaction.