Modeling and Simulation of Grinding Surface Microtopography Considering Grinding Thermal Deformation
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摘要: 针对磨削热引起的工件热胀冷缩效应对磨削后的工件表面微观形貌的影响，提出一种考虑磨削热变形影响的磨削表面微观形貌建模方法。假设磨粒为正四面体建立砂轮形貌；根据磨削运动学原理，建立考虑磨削热变形效应的单颗磨粒三维切削轨迹，并结合砂轮形貌与单颗磨粒轨迹，建立磨削表面微观形貌预测模型，通过磨削实验对仿真结果进行验证，结果为该模型最小误差仅0.135%，最大误差为13.31%，验证了在磨削热变形效应影响下的仿真结果的准确性。Abstract: A modeling method of grinding surface micro-topography considering the influence of the grinding thermal deformation is proposed to solve the influence of the grinding heat on the surface grinding morphology of workpieces.Assuming that the abrasive grains are regular tetrahedrons; establish a three-dimensional cutting trajectory of a single abrasive grain by considering the effect of the grinding thermal deformation; establish a prediction model for the grinding surface micro-morphology. The results of grinding experiments show that the minimum error of the model is only 0.135%, and the maximum error is 13.31%, which verifies the accuracy of the simulation results under the influence of the grinding thermal deformation effects.
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Key words:
- grinding morphology /
- grinding thermal deformation /
- surface morphology /
- modeling
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表 1 干研磨磨削加工参数
参数 数值 砂轮粒度M 120 砂轮直径ds/mm 100 砂轮宽度b/mm 10 工件尺寸 L16-W9-T9 磨削主轴转速 vs /
( r·min−1)400，800，1200，
1600，2000，2400切削深度/mm 0.005，0.01，0.015，
0.02，0.025，0.03进给速率/(mm·min−1) 300 
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表 2 关于实验与仿真结果之间的粗糙度对比表
砂轮转速/
（r·min−1）切削深度/
mm实验测得形貌
粗糙度Sa/μm考虑磨削相变的仿真模型
粗糙度Sa/μm仿真与实验对比
误差/%400 0.01 1.322 1.1457 13.31 800 0.888 0.8868 0.135 1200 0.879 0.8738 0.592 1600 0.737 0.7810 5.967 2000 0.670 0.6768 1.015 2400 0.613 0.5990 2.282 1200 0.005 0.841 0.8583 2.057 0.01 0.879 0.8738 0.592 0.015 0.924 0.9000 2.597 0.02 0.932 0.9175 1.556 0.025 0.944 0.9219 2.344 0.03 0.968 0.9262 4.314
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