中国机械工程

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磨料水射流二次逆向切割对断面质量的提升研究

宋磊1,2;武美萍1,2;缪小进1,2;任仲贺1   

  1. 1.江南大学机械工程学院,无锡,214122
    2.江苏省食品先进制造装备技术重点实验室,无锡,214122
  • 出版日期:2019-05-25 发布日期:2019-05-28
  • 基金资助:
    国家自然科学基金资助项目(51575237)

Study on Surface Quality Improvement by Abrasive Water Jet Secondary-reverse Cutting

SONG Lei1,2;WU Meiping1,2;MIAO Xiaojin1,2;REN Zhonghe1   

  1. 1.Mechanical Engineering Department of Jiangnan University, Wuxi, Jiangsu,214122
    2.Jiangsu Province Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Wuxi, Jiangsu,214122
  • Online:2019-05-25 Published:2019-05-28

摘要: 针对磨料水射流切割过程中存在的拖尾余纹、切缝锥度和切割留尾问题,基于磨料水射流切割理论,设计了3组不同因素组合下的单次正向切割、单次1/2速度正向切割和二次逆向切割试验,探讨了3种不同切割方式下的断面形貌产生机理,并对试验结果进行对比分析。结果表明,二次逆向切割可降低表面粗糙度约52%~85%,可降低切缝锥度约66%~72%,同时可消除切割留尾。因此,高压磨料水射流采用二次逆向切割的方式可以显著提高磨料水射流切割工件的断面质量。

关键词: 磨料水射流, 二次切割, 拖尾余纹, 切缝锥度, 切割留尾

Abstract: According to the quality problems like trailing stripe, kerf taper and cutting tail in the abrasive water jet cutting(AWJC) processes, three experimental groups were designed under different combinations of cutting process parameters, including single-positive cutting, single half-speed-positive cutting and secondary-reverse cutting experiments based on the theory of AWJC. The mechanism of the section morphology under three different cutting modes was fully discussed, and the experimental results were deeply compared and analyzed. The results show that secondary-reverse cutting may reduce the surface roughness about 52%~85% and the kerf taper about 66%~72%, with efficient elimination of the cutting tail. Therefore, the operation, adopting the method of secondary reverse cutting may significantly improve the section surface quality of the target workpiece in AWJC.

Key words: abrasive water jet, secondary cutting, trailing stripe, kerf taper, cutting tail

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