文章摘要
袁巧玲,王玥,文东辉,孔凡志,郭旭.K9光学元件的锥形约束射流抛光流场与加工实验研究[J].高技术通讯(中文),2024,34(3):320~330
K9光学元件的锥形约束射流抛光流场与加工实验研究
Experimental study of polished flow field and processing of tapered confined jets for K9 optical elements
  
DOI:10. 3772 / j. issn. 1002-0470. 2024. 03. 011
中文关键词: 锥形约束; 冲击损伤; 表面粗糙度; K9玻璃; 去除函数
英文关键词: conical restraint, impact damage, surface roughness, K9 glass, removal function
基金项目:
作者单位
袁巧玲 (特种装备制造与先进加工技术教育部/浙江省重点实验室杭州 310023) (浙江工业大学机械工程学院杭州 310023) 
王玥  
文东辉  
孔凡志  
郭旭  
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中文摘要:
      提出了锥形约束射流抛光的加工方法,将原本垂直的细小射流约束成几乎平行于工件表面的环形射流。使用Fluent软件对抛光流场进行数值分析,根据Preston方程建立了材料去除函数模型;并以K9玻璃为加工对象,利用自主设计的锥形约束射流抛光平台进行加工实验。结果表明,锥形约束射流抛光方法法向最大速度比切向最大速度小63.9%,从而减少射流在垂直于工件表面方向的冲击损伤;锥形约束射流抛光后,K9玻璃表面粗糙度在加工区域内呈“V”型分布,其算数平均粗糙度(Ra)值从95.40nm降至14.52nm,表面质量得到明显提高。锥形约束射流抛光主要依靠射流沿工件表面的剪切力,不仅有效减小了射流法向冲击力,对射流的约束还减小了射流束的发散;确定的表面去除函数表明该方法有望实现确定性抛光;另外,环形的射流出口提高了射流抛光的效率。
英文摘要:
      This paper proposes a processing method of conical constrained jet polishing, which constrains the originally perpendicular fine jet into an annular jet almost parallel to the surface of the workpiece. Numerical analysis of the polishing flow field is carried out using Fluent software, and the material removal function model is established according to Preston’s equation. Taking K9 glass as the processing object, the processing experiment is carried out using the independently designed conical constrained jet polishing platform. The results show that the normal maximum velocity of the conical constrained jet polishing method is 63.9% smaller than the tangential maximum velocity, which reduces the impact damage of the jet in the direction perpendicular to the surface of the workpiece; after the conical constrained jet polishing, the surface roughness of the K9 glass shows a “V” distribution in the processing area with its arithmetic average roughness decreasing from 95.40nm to 14.52nm, and the surface quality has been significantly improved. The conical constrained jet polishing mainly relies on the shear force of the jet along the surface of the workpiece, which not only effectively reduces the normal impact force of the jet, but also reduces the dispersion of the jet beam by the constraint of the jet. The determined surface removal function indicates that deterministic polishing is expected to be realized; in addition, the annular jet outlet improves the efficiency of the jet polishing.
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