流体机械

2009, v.37;No.441(03) 11-15+23

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基于淹没环境的超高压后混合磨料水射流切割试验研究
Cutting Experimental Research of Ultrahigh Pressure Rear-mixed Abrasive Waterjet in Submerged Environment

王宗龙;胡寿根;姚文龙;杨升;
WANG Zong-long,HU Shou-gen,YAO Wen-long,YANG Sheng(University of Shanghai for Science and Technology,Shanghai 200093,China)

摘要(Abstract):

利用超高压水射流切割试验系统,在80~280MPa压力范围内进行淹没磨料水射流切割试验研究,通过试验及数据分析,验证了后混合淹没磨料射流切割的可行性,得出了磨料粒径和质量流量、射流压力、靶距、切割横移速度等参数对射流切割性能的影响规律,对于脆性和塑性材料,试验中各参数对切割深度的影响基本一致。结果表明:在试验给出的工况条件下,磨料流量存在最佳值,在一定范围内切割深度随磨料流量增加而增加,当磨料流量达到一定值后,切割深度随流量增加反而下降;切割深度与射流压力基本呈线性增长关系;随着靶距的增大,切割深度逐渐减小;切割深度随切割速度的增加呈指数衰减趋势,并且相同试验工况下淹没射流切割深度要大于非淹没状态。试验结果为超高压淹没磨料水射流的实际应用和研究提供了参考。
With the equipment of the waterjet cutting system,in the range from 80 to 240MPa,the experiments of submerged abrasive waterjet cutting have been done.Based on experiments,meaningful results have been derived that the rear-mixed abrasive waterjet cutting in the whole submerged environment is feasible,and reveal the relationships between the cutting depth and cutting parameters in the experiments for both friable material and plastic material.The study shows that,in the condition of the experiment,the flux of abrasive has an optimal value,the cutting depth grows with the flux of abrasive in certain range,then decreases when the flux over the optimal value;the cutting depth increases with the waterjet pressure linearly basically;falls with the standoff distance rising,and decays exponentially with the cutting speed increase.In the same conditions,the cutting depth in submerged environment is better than not.The study could apply in practice and further studies of the ultrahigh pressure submerged abrasive waterjet.

关键词(KeyWords): 淹没状态;切割性能;磨料射流,切割参数
submerged environment;cutting performance;abrasive waterjet;cutting parameters

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基金项目(Foundation): 国家自然科学基金项目(50275097);; 上海市科委基金项目(022912182)

作者(Author): 王宗龙;胡寿根;姚文龙;杨升;
WANG Zong-long,HU Shou-gen,YAO Wen-long,YANG Sheng(University of Shanghai for Science and Technology,Shanghai 200093,China)

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