| 基于流体自激的磨料水射流加工仿真与实验 |
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| 引用本文： | 邓乾发,汪杨笑,袁巨龙,吕冰海,赵天晨,王旭. 基于流体自激的磨料水射流加工仿真与实验[J]. 中国机械工程, 2022, 33(3): 279-289. DOI: 10.3969/j.issn.1004-132X.2022.03.004 |
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| 作者姓名： | 邓乾发 汪杨笑 袁巨龙 吕冰海 赵天晨 王旭 |
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| 作者单位： | 1.浙江工业大学超精密加工研究中心，杭州，3100232.浙江工业大学特种装备制造与先进加工技术教育部重点实验室，杭州，3100233.衢州学院机械工程学院，衢州，324000 |
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| 基金项目： | 国家自然科学基金（51775511,U1809221,51805485,U1604254）；浙江省自然科学基金(LY17E050022，LR17E050002，LGG19E050006，LY21E050010) |
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| 摘 要： | 针对先进陶瓷材料的高效、精密加工,提出了一种基于流体自激的新型磨料水射流加工方法——自激振荡磨料水射流加工(SEO-AWJM).采用ANSYS Fluent大涡模拟模型进行了流体仿真,仿真结果表明:当入口流速为135 m/s,腔长为4 mm时,下游喷嘴出口脉冲率最大达到28.47％.射流束的脉冲特性使得工件表面停滞层周...
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| 关 键 词： | 自激振荡 磨料射流 加工 陶瓷 |
Simulations and Experiments on Abrasive Water Jet Machining Based on Fluid Self-excitation |
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| DENG Qianfa,WANG Yangxiao,YUAN Julong,LYU Binghai,ZHAO Tianchen,WANG Xu. Simulations and Experiments on Abrasive Water Jet Machining Based on Fluid Self-excitation[J]. China Mechanical Engineering, 2022, 33(3): 279-289. DOI: 10.3969/j.issn.1004-132X.2022.03.004 |
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| Authors: | DENG Qianfa WANG Yangxiao YUAN Julong LYU Binghai ZHAO Tianchen WANG Xu |
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| Affiliation: | 1.Ultra-Precision Machining Center,Zhejiang University of Technology,Hangzhou,3100232.Key Laboratory of Special Purpose Equipment and Advanced Processing Technology of Ministry of Education,Zhejiang University of Technology,Hangzhou,3100233.College of Mechanical Engineering,Quzhou University,Quzhou,Zhejiang,324000 |
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| Abstract: | To precisely machine advanced ceramics with enhanced machining efficiency, a new type of water jet machining method was proposed based on fluid self-excitation, termed self-excited oscillating abrasive water jet machining(SEO-AWJM). ANSYS Fluents large eddy simulation model was used for fluid simulation. Simulation results show that with the inlet velocity of 135 m/s and the cavity length of 4 mm, the downstream nozzle outlet pulse rate reaches a maximum of 28.47%. The pulse characteristics of the jet beam cause periodically changes of stagnant layer of workpiece surfaces. Thereby a higher peak wall shear force was obtained and the force reciprocated on workpiece surfaces. SEO-AWJM experiments were conducted, the length of the chamber was adjusted to obtain the best fluid self-excited effectiveness, and silicon nitride substrate was processed. Experimental results show that after 10min fixed-point machining, the maximum removed depth is as 7.5 μm with abrasive water jet machining(AWJM)，while it is as 9.4 μm with SEO-AWJM. The initial surface roughness value Ra was 108.9 nm. After 6 times of AWJM, Ra reaches a stable value of 47.9 nm, after 4 times of SEO-AWJM, Ra reaches a stable value of 51.3 nm. |
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| Keywords: | self-excited oscillating abrasive jet machining ceramics |
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