• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2020, Vol. 56 ›› Issue (11): 229-239.doi: 10.3901/JME.2020.11.229

• 制造工艺与装备 • 上一篇    下一篇

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球头刀速度效应敏感区域的最低切削速度分析

张安山, 刘献礼, 岳彩旭, 杨树财, 夏伟   

  1. 哈尔滨理工大学先进制造智能化技术教育部重点实验室 哈尔滨 150080
  • 收稿日期:2019-08-26 修回日期:2019-12-17 出版日期:2020-06-05 发布日期:2020-06-12
  • 通讯作者: 刘献礼(通信作者),男,1961年出生,博士,教授,博士研究生导师。主要研究方向为金属切削理论及刀具技术、数字化加工技术。E-mail:xianli.liu@hrbust.edu.cn
  • 作者简介:张安山,男,1987年出生,博士研究生。主要研究方向为金属切削理论及刀具技术。E-mail:aszhang@hrbust.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(5171001055)。

Analysis of Minimum Cutting Speed in Velocity Effect Sensitive Area of Ball End Mill

ZHANG Anshan, LIU Xianli, YUE Caixu, YANG Shucai, XIA Wei   

  1. Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science & Technology, Harbin 150080
  • Received:2019-08-26 Revised:2019-12-17 Online:2020-06-05 Published:2020-06-12

摘要: 为有效评价铣刀的铣削性能,对铣削运动过程中刀具主运动与进给运动关系进行分析,建立了速度比例函数模型。模型分析表明:球头刀端部约25°范围内为速度效应敏感区域,切削性能不佳,而环形刀无速度效应敏感区域,铣削性能优于球头刀。基于单次铣削路径上切触几何关系,分析了球头刀进给方向对切触区域内最低切削速度影响,并建立了球头刀最低切削速度点法矢角与刀具、曲面坡度、切深、进给方向等参数间的数学模型,依据该模型可判定最低切削速度点是否处于球头刀速度效应敏感区域内。试验结果表明:球头刀速度效应敏感区域参与铣削时,切削路径上会产生与进给方向垂直的振纹,垂直向上方向附近存在一个最佳进给方向区间;环形刀铣削性能明显优于球头刀,进给方向对铣削效果的影响不大。

关键词: 速度比例函数, 速度效应敏感区域, 进给方向, 最低切削速度, 切触几何关系

Abstract: To effectively evaluate the performance of the milling cutters, the relationship between the main movement and the feed movement is analyzed, and the speed proportional function model is established. The analysis shows that the cutting performance of the ball end mill is poor within the range of less than 25°, which is the sensitive area of velocity effect. while the milling performance of the torus cutter without the velocity effect sensitive area is better than the ball end mill. Based on the geometry contact relations, the impact of feed direction on the minimum cutting speed in the contact area is respectively analyzed for the ball end mill, and the mathematical model for the ball end mill is presented between the minimum cutting speed point and some machining parameters, such as cutters, the surface slope, the cutting depth, the feed direction. Based on the math model, it can be determined whether the minimum cutting speed point is within the velocity effect sensitive area of the ball end mill. The experimental results show that when the velocity effect sensitive area of the ball end mill is involved in the milling area, a vibration perpendicular to the feed direction is generated on the cutting path, and an optimal feed direction interval exists in the vertical upward direction. The torus cutter milling performance is significantly better than the ball end mill, and the feed direction has little influence on the milling effect.

Key words: speed proportion function, velocity effect sensitive area, feed direction, the minimum cutting speed, geometry contact relations

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