可加工微晶玻璃陶瓷磨削表面成形机制

发布时间：2018-04-06 00:24

本文选题：复合磨削因子　切入点：临界磨削深度　出处：《机械工程学报》2017年15期

【摘要】：通过在MK9025A型曲线磨床上开展微晶玻璃陶瓷磨削试验,研究可加工陶瓷表面成形机制和表面粗糙度。结果表明,可加工陶瓷材料磨削时其材料去除具有延性去除、延脆性去除、脆性去除三种模式,以硬脆材料相关系数Mr改进可加工陶瓷未变形切屑厚度模型,提出延性域系数η0、延脆性域系数η1,用以构建延性-延脆性和延脆性-脆性两个临界磨削深度模型。根据可加工微晶玻璃陶瓷单因素磨削试验,提出了复合磨削因子Q,基于以上未变形切屑厚度模型和两个临界磨削深度模型建立表面粗糙度模型,得到了表面粗糙度与复合磨削因子之间的关系,利用标准差检验模型精度。正交试验验证结果表明,可加工微晶玻璃陶瓷表面粗糙度试验值与所建立的表面粗糙度模型理论值吻合度较高。
[Abstract]:The surface forming mechanism and surface roughness of machinable ceramics were studied by grinding experiment of glass-ceramics on MK9025A curve grinder.The results show that the material removal has three modes: ductility removal, ductility removal and brittleness removal. The model of undeformed chip thickness of machinable ceramics is improved with the correlation coefficient of hard and brittle materials.The ductility domain coefficient 畏 0 and the ductility domain coefficient 畏 1 are proposed to construct two critical grinding depth models: ductile ductility brittleness and ductile brittleness.Based on the single factor grinding test of machinable glass-ceramics, a composite grinding factor Q is proposed. The surface roughness model is established based on the above undeformed chip thickness model and two critical grinding depth models.The relationship between the surface roughness and the grinding factor is obtained, and the accuracy of the model is tested by standard deviation.The results of orthogonal test show that the surface roughness of machinable glass-ceramics is in good agreement with the theoretical value of the established surface roughness model.
【作者单位】：东北大学秦皇岛分校控制工程学院;东北大学机械工程与自动化学院;
【基金】：国家自然科学基金资助项目(51275083)
【分类号】：TQ171.733

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