固液两相磨粒流研抛工艺优化及质量影响

发布时间：2018-01-22 02:16

本文关键词： 共轨管 SiC体积分数粘温特性湍流粘度数学模型　出处：《光学精密工程》2017年06期 　论文类型：期刊论文

【摘要】：为研究磨粒流对异形腔孔内壁表面以及微小孔的研抛去毛刺等的作用效果,探讨了研抛过程中磨粒流各工艺参数与加工质量间的作用关系。以共轨管这种非直线管为研究对象,对磨粒流抛光共轨管过程进行数值模拟研究,探索各工艺参数对磨粒流研抛的影响。数值模拟结果表明:控制碳化硅体积分数可以改变磨粒流研抛过程中的粘温特性,从而可以控制磨粒流的研抛质量。然后采用正交方法设计实验方案,实验过程中,采集抛光过程中温度和粘度的变化数据,分析磨粒流研抛中粘温特性对磨粒流研抛质量的影响。试验与数值模拟结果表明,在磨粒流研抛共轨管过程中SiC的体积分数比出口压力的极差秩大,磨粒流研抛确实可有效改善工件表面质量。而且本文还进一步得出在本试验条件下,磨粒流研抛共轨管的最佳工艺参数:出口压力为5 MPa,SiC体积分数为0.25%,SiC目数为80,同时获得了表面粗糙度与体积分数的回归方程,可用于指导磨粒流实际研抛生产工作。
[Abstract]:In order to study the effect of abrasive particle flow on the surface of the inner wall of the shaped cavity hole and the polishing and throwing of the tiny hole to remove burr and so on. The relationship between the process parameters of abrasive flow and the machining quality was discussed. The process of polishing common rail tube by abrasive flow was studied by numerical simulation with common rail tube as the research object. The numerical simulation results show that controlling the volume fraction of silicon carbide can change the viscosity and temperature characteristics of abrasive flow polishing process. In order to control the polishing quality of abrasive flow, the orthogonal method is used to design the experimental scheme. During the experiment, the temperature and viscosity data are collected during the polishing process. The effect of viscosity and temperature on the quality of abrasive grain polishing is analyzed. The results of experiment and numerical simulation show that the volume fraction of SiC in the process of abrasive flow polishing common rail tube is larger than the rank of extreme difference of exit pressure. Abrasive flow polishing can effectively improve the surface quality of workpiece. Furthermore, under the test conditions, the optimum technological parameters of abrasive flow polishing common rail tube are obtained: the outlet pressure is 5 MPa. The volume fraction of SiC is 0.25% and the number of sic mesh is 80. At the same time, the regression equation of surface roughness and volume fraction is obtained, which can be used to guide the production of abrasive flow.
【作者单位】：长春理工大学机电工程学院;
【基金】：国家自然科学基金资助项目(No.51206011) 吉林省科技发展计划资助项目(No.20160101270JC,20170204064GX) 吉林省教育厅项目(吉教科合字[2016]第386号)
【分类号】：TG664
【正文快照】： 1引言磨粒流抛光技术是近年来新兴的一种抛光方法,磨粒流一般是由具有粘弹性的液体载体与具有一定刚度和强度的固体颗粒混合形成的。在外界压力作用下,悬浮在液体介质中的固体颗粒对复杂结构零件的内表面进行反复的冲击碰撞,以实现对工件内表面的平整、抛光及材料的微量去除等

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