China Mechanical Engineering

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Study on Sawing Characteristics of Band Saw for Metal under Ultrasonic Water Mist

NI Jing;CHEN Yebo;MENG Zhen;FENG Guodong;XU Jing   

  1. Department of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou ,310018
  • Online:2018-09-10 Published:2018-09-04
  • Supported by:
    National Natural Science Foundation of China (No. 51775153,51505112,51375129)

金属带锯床超声水雾作用下锯切特性研究

倪敬;陈烨波;蒙臻;冯国栋;许静   

  1. 杭州电子科技大学机械工程学院,杭州,310018
  • 基金资助:
    国家自然科学基金资助项目(51775153,51505112,51375129)
    National Natural Science Foundation of China (No. 51775153,51505112,51375129)

Abstract: Aiming at the applications of minimal quantity metal lubrication technology in the sawing processes of  blades of band saw for, an ultrasonic jet spray lubrication system for saw tooth was built, and the cutting tests were carried out under dry cutting, flowing and ultrasonic water mist. The results show that the mean value of the main cutting force Fx is the smallest under the action of ultrasonic water mist, which is 53% Fx under the dry cutting and 31% Fx under the flowing effect. Moreover, the cutting fluid consumption of ultrasonic water mist is smaller, which is only 10% of the consumption of flowing action. As analysis and observation with high speed micro-camera, micron-level droplets are produced on the surfaces of the saw teeth under the ultrasonic water mist. Micro-wetting effects are achieved on the surfaces of the saw teeth. This phenomenon may lead to a smaller wetting angle and better wetting effect. Compared with the dry cutting and flowing action, the chips formed under the action of ultrasonic water mist have a smaller radius of curvature, only 300 μm, which also confirms the conclusion that ultrasonic water mist has the best wetting effect iveness on the saw tooth surfaces.

Key words: ultrasonic water mist, sawing, micro-wetting, green cutting fluid

摘要: 针对微量润滑技术在金属带锯锯切加工过程中的应用开展相关研究,搭建了带锯条锯齿的超声水雾直喷式润滑系统,进行了干切削、冲刷和超声水雾作用下锯切对比实验。实验结果表明:超声水雾作用下锯切主切削力Fx的均值最小,为干切削时Fx均值的53%、冲刷作用时Fx均值的31%,且切削液消耗量更小,仅为冲刷作用时消耗量的10%。利用显微高速摄像机进行研究与分析,超声水雾作用下微米级切削液液滴在锯齿材料表面会形成微观润湿效应,使得液滴与锯齿材料表面具有更小的润湿角和润湿效果;此外,相比干切削和冲刷作用,超声水雾作用下形成的锯切切屑具有更小的曲率半径,仅为300 μm,这也从另一方面说明了超声水雾液滴对锯齿表面润滑效果较好。

关键词: 超声水雾, 锯切, 微观润湿, 绿色切削液

CLC Number: