| 摘要: |
| 为解决陶瓷管内表面质量问题,提高磨料利用率,寻求低频交变磁场下磁力研磨加工的最佳工艺参数,利用 Maxwell 软件对加工区域进行磁场仿真,采用 Box-Behnken 进行响应面试验设计并优化工艺参数,用 ANOVA 验证表面粗糙度预测模型的合理性。 结果表明:低频交变磁场加工区域中磁场强度可达 650. 04 kA/ m,磁感应强度可达 0. 82 T,表面粗糙度预测模型调整后的拟合优度 R2adj 为 91. 65%,经过响应面优化后得到的最佳工艺参数为工件转速 977. 78 r/ min,铁磁粒子粒径 210. 61 μm,金刚石粒子粒径 3. 35 μm,电流频率 3. 01 Hz,使用调整后的工艺参数加工氧化铝陶瓷管件内表面 120 min 后,表面粗糙度 Ra 由 2. 25 μm 降至 0. 34 μm,使用低频交变磁场进行磁力研磨可以有效提高陶瓷管内表面质量。 |
| 关键词: 磁力研磨 交变磁场 工艺参数 Al2O3 陶瓷 表面粗糙度 响应面分析 |
| DOI：10.11933/j.issn.1007-9289.20210425004 |
| 分类号:TG356 |
| 基金项目:国家自然科学基金(51775258)、辽宁省自然科学基金重点 (20170540458)、精密与特种加工教育部重点试验室基金(B201703)资助项目 |
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| Magnetic Abrasive Finishing of Ceramic Tube Inner Surface Based on Low Frequency Alternating Magnetic Field |
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LIU Wenhao, CHEN Yan, ZHANG Dongyang
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School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan 114051 , China
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| Abstract: |
| In order to solve the problem of inner surface quality of ceramic tube, improve the utilization rate of abrasive, and seek the best process parameters of magnetic abrasive finishing under low frequency alternating magnetic field, Maxwell software was used to simulate the magnetic field in the processing area. Box Behnken was used to design the response surface test and optimize the process parameters. The rationality of the surface roughness prediction model was verified by ANOVA. The results show that the magnetic field intensity can reach 650. 04 kA/ m and the magnetic induction intensity can reach 0. 82 T in the low frequency alternating magnetic field processing area. The fitting goodness of surface roughness prediction model adjusted R2adj is 91. 65%. The optimum process parameters after response surface optimization are as follows: workpiece speed 977. 78 r/ min, ferromagnetic particle size 210. 61 μm, diamond particle size 3. 35 μm, current frequency 3. 01 Hz. The surface roughness of the inner surface of alumina ceramic pipe is decreased from Ra 2. 25 μm to Ra 0. 34 μm after 120 min processing with the adjusted process parameters. The inner surface quality of ceramic tube can be effectively improved by using low frequency alternating magnetic field for magnetic abrasive finishing. |
| Key words: magnetic abrasive finishing alternating magnetic field process parameters alumina ceramics surface roughness response surface methodology |
