杨海吉,张晓君,陈燕,韩冰.磁力研磨精密抛光φ4×150 mm TC4管内表面的实验研究[J].表面技术,2017,46(12):259-264.
YANG Hai-ji,ZHANG Xiao-jun,CHEN Yan,HAN Bing.Polishing of Inner Surface ofφ4×150 mm TC4 Tube by Magnetic Abrasive Finishing[J].Surface Technology,2017,46(12):259-264 |
| 磁力研磨精密抛光φ4×150 mm TC4管内表面的实验研究 |
| Polishing of Inner Surface ofφ4×150 mm TC4 Tube by Magnetic Abrasive Finishing |
| 投稿时间：2017-06-14 修订日期：2017-12-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.12.040 |
| 中文关键词: 磁力研磨 柔性磁极链 小直径TC4管 响应面法 表面粗糙度值 研磨效率 |
| 英文关键词:magnetic abrasive finishing flexible magnetic chain, small-diameter tube response surface methodology surface roughness value grinding efficiency |
| 基金项目:国家自然科学基金（51105187） |
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| 中文摘要: |
| 目的 提高磁力研磨法光整小直径TC4管内表面时的研磨效率。方法 将多个径向充磁的磁极组成柔性磁极链放置在工件的内部，致使整个加工区域的磁感应强度得到大幅度增强，再配合多种运动，完成对小直径细长管内表面的高效精密抛光。利用响应面法分析了工件转速、磨粒粒径和研磨液用量的交互作用对研磨效率的影响规律。结果 在磨粒的平均粒径保持不变时，转速在18 000~20 000 r/min范围内时，表面粗糙度值趋于稳定，研磨液用量为8 mL时，表面粗糙度值达到最低。研磨液用量保持不变、转速在18 000~20 000 r/min范围内时，表面粗糙度趋于稳定。磨粒的平均粒径为250 μm时，表面粗糙度值达到最低。工件转速不变、研磨液用量为8 mL、磨粒的平均粒径为250 μm时，工件表面粗糙度值达到最低。经过40 min的研磨，工件各位置的表面粗糙度值Ra稳定至0.35~0.2 μm。结论 优化后的工艺参数组合为：工件转速20 000 r/min、研磨液用量8 mL、磁性磨粒的平均粒径250 μm。加工后工件内表面加工均匀性显著提升，原始缺陷被完全去除，达到最佳效果。 |
| 英文摘要: |
| The work aims to improve of magnetic abrasive finishing efficiency of small-diameter TC4 tubes. A flexible magnetic chain consisting of several radial magnetized poles was placed inside the workpiece, so as greatly improve magnetic induction intensity in the whole machining area. Assisted by a plurality of motions, efficient precision polishing on internal surface of small-diameter elongated tubes was completed. Law of influence of workpiece revolving speed, particle size and volume of grinding fluid on the finishing efficiency was studied in response surface methodology. When the average particle size of abrasive particles remained unchanged and the revolving speed ranged from 18 000 to 20 000 r/min, the surface roughness value tended to be stable; when the volume of grinding fluid was 8 mL, the surface roughness value reached the minimum; when the volume of grinding fluid remained unchanged and the revolving speed ranged from 18 000 to 20 000 r/min, the surface roughness value tended to be stable; when the average particle size was 250 μm, the surface roughness value reached the minimum; when the workpiece revolving speed remained unchanged, volume of grinding fluid was 8 mL and the average particle size was 250 μm, the surface roughness reached the minimum. After the 40 min grinding, the surface roughness value Ra in all positions on the workpiece fell within 0.35~0.2 μm stably. Optimized combination of process parameters is as follows: revolving speed of 20 000 r/min, volume of grinding fluid of 8 mL, and average particle size of 250 μm. The machining uniformity of inner surface is improved obviously after the workpiece is machined, original defects are completely removed and best effects are achieved. |
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