杨易彬,吕冰海,宋志龙,邵琦,柯明峰,袁巨龙,Duc-nam Nguyen.铝合金锥镜化学增强力流变抛光优化实验研究[J].表面技术,2020,49(10):329-337.
YANG Yi-bin,LYU Bing-hai,SONG Zhi-long,SHAO Qi,KE Ming-feng,YUAN Ju-long,Duc-nam Nguyen.Optimization Experiment for Chemistry Enhanced Shear Thickening Polishing of Aluminum Alloy Conical Mirror[J].Surface Technology,2020,49(10):329-337 |
| 铝合金锥镜化学增强力流变抛光优化实验研究 |
| Optimization Experiment for Chemistry Enhanced Shear Thickening Polishing of Aluminum Alloy Conical Mirror |
| 投稿时间：2020-02-22 修订日期：2020-10-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.10.039 |
| 中文关键词: 6061铝合金锥镜 力流变抛光 表面形貌 光路集中度 参数优化 正交实验 |
| 英文关键词:6061 aluminum alloy shear thickening polishing surface topography concentration of the reflected light path parameter optimization orthogonal experiment |
| 基金项目:浙江省自然科学基金（LR17E050002） |
| 作者 | 单位 |
| 杨易彬 | 1.浙江工业大学 超精密加工研究中心，杭州 310014 |
| 吕冰海 | 1.浙江工业大学 超精密加工研究中心，杭州 310014 |
| 宋志龙 | 1.浙江工业大学 超精密加工研究中心，杭州 310014 |
| 邵琦 | 1.浙江工业大学 超精密加工研究中心，杭州 310014 |
| 柯明峰 | 1.浙江工业大学 超精密加工研究中心，杭州 310014 |
| 袁巨龙 | 1.浙江工业大学 超精密加工研究中心，杭州 310014 |
| Duc-nam Nguyen | 2.胡志明工业大学 机械工程学院，越南 胡志明市 727010 |
|
| Author | Institution |
| YANG Yi-bin | 1.Ultra-precision Machining Center, Zhejiang University of Technology, Hangzhou 310014, China |
| LYU Bing-hai | 1.Ultra-precision Machining Center, Zhejiang University of Technology, Hangzhou 310014, China |
| SONG Zhi-long | 1.Ultra-precision Machining Center, Zhejiang University of Technology, Hangzhou 310014, China |
| SHAO Qi | 1.Ultra-precision Machining Center, Zhejiang University of Technology, Hangzhou 310014, China |
| KE Ming-feng | 1.Ultra-precision Machining Center, Zhejiang University of Technology, Hangzhou 310014, China |
| YUAN Ju-long | 1.Ultra-precision Machining Center, Zhejiang University of Technology, Hangzhou 310014, China |
| Duc-nam Nguyen | 2.School of Mechanical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh 727010, Vietnam |
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| 中文摘要: |
| 目的 为获得光滑表面并提高铝合金（Al 6061）锥镜全景反射光路集中度，采用力流变抛光方法去除工件在金刚石刀具切削后划痕、凹坑和凸起等表面缺陷，并消除这些表面缺陷导致的锥镜发射光路散射。方法 通过田口法分析力流变抛光过程中四个关键工艺参数——抛光速度、CeO2磨粒的组分（平均粒径为1.6 μm的大颗粒）/（平均粒径为200 nm的小颗粒）、磨粒浓度和抛光液pH值对抛光后工件表面粗糙度的影响。同时，对铝合金锥镜反射光路集中度进行了观测实验，讨论了表面形貌对反射光集中度的影响。结果 用信噪比分析发现，实验条件下抛光液pH值对抛光后的表面粗糙度影响最大，抛光速度和磨粒浓度次之，CeO2磨粒组分影响最小。优化得到的最佳抛光参数组合为：大/小磨粒组分比7∶3，磨粒质量分数4.5%，抛光速度1.38 m/s，抛光液pH=5。在该条件下抛光20 min后，表面粗糙度（Ra）从64.9 nm降低至8.1 nm，基本消除了切削的表面缺陷。结论 利用力流变抛光方法可以有效去除铝合金锥镜表面金刚石切削后的表面缺陷。铝合金材料硬质点Mg2Si对抛光后的表面形貌有重要影响，在优化的力流变抛光条件下，通过化学反应与磨粒机械去除的平衡，可以同时去除工件基体材料和硬质相，获得没有凹坑和凸起的光滑表面。 |
| 英文摘要: |
| The work aims to obtain smooth surface and improve the concentration of the reflected light path of aluminum alloy (Al 6061) cone mirror, adopt shear thickening polishing (STP) to remove the surface defects including cutting marks, pits, and humps after diamond cutting and eliminate the light path scattering caused by these defects. The influence of four key parameters in the STP process including polishing speed, composition of CeO2 abrasive (large particles with average size of 1.6 μm)/(small particles with average size of 200 nm), abrasive concentration and pH of shear thickening polishing slurry (STP slurry) on the surface roughness (Ra/Rz) was analyzed by Taguchi method. At the same time, the experiment to observe the concentration of reflected light was carried out and the effect of surface morphology on the concentration of reflected light was discussed. According to the analysis of S/N ratio, under the experimental conditions, the pH value of STP slurry had the greatest influence on the surface roughness after polishing, followed by polishing speed and CeO2 abrasive concentration. While, CeO2 abrasive composition had the least influence. The optimized polishing parameters with 7∶3 of large/small abrasives, 4.5wt% abrasive concentration, 1.38 m/s polishing speed and pH 5 of STP slurry were determined. After polishing for 20 min, the surface roughness (Ra) was reduced from 64.9 nm to 8.1 nm, and the surface defects were removed. The defects on the surface of aluminum alloy cone mirror after diamond cutting can be effectively removed after STP process. The hard prase (Mg2Si) of aluminum alloy material has an important influence on the surface morphology after polishing. Under the optimized conditions of STP, through the balance of chemical reaction and mechanical removal of abrasive, matrix material and hard phase of the workpiece can be removed at the same time, and a smooth surface without pits and humps can be obtained. |
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