中国机械工程 ›› 2022, Vol. 33 ›› Issue (15): 1780-1786.DOI: 10.3969/j.issn.1004-132X.2022.15.003

• 磨粒技术专栏 • 上一篇    下一篇

激光与电火花复合修整粗粒度弧形金刚石砂轮试验研究

陈根余;戴隆州;李明全;袁尚勇   

  1. 湖南大学机械与运载工程学院,长沙,410082
  • 出版日期:2022-08-10 发布日期:2022-08-25
  • 通讯作者: 戴隆州(通信作者),男,1989年生,博士研究生。研究方向为超硬磨料砂轮修整技术、激光复合加工。E-mail:dlz200890@163.com。
  • 作者简介:陈根余,男,1965年生,教授、博士研究生导师。研究方向为超硬磨料砂轮修整技术、激光微纳加工、激光加工在线检测等。E-mail:hdgychen@163.com。
  • 基金资助:
    广东省重点领域研发计划(2020B090924005)

Experimental Research of Coarse-grained Arc Diamond Grinding Wheel Dressed by Laser and Electrical Discharge Compound Dressing

CHEN Genyu;DAI Longzhou;LI Mingquan;YUAN Shangyong   

  1. College of Mechanical and Vehicle Engineering,Hunan University,Changsha,410082
  • Online:2022-08-10 Published:2022-08-25

摘要: 因受到激光高斯光束特性的影响,辐照在砂轮表面上的光斑大小和激光能量都跟随修整路径变化,难以实现高精度的弧形金刚石砂轮的修整,为此,提出采用激光粗修整和电火花精修整的复合修整方法。先用激光修整高效去除多余磨料层来得到弧形轮廓,再用一高精度弧形电极匹配该轮廓进行电火花修整,得到较高精度的弧形砂轮。在粒度为120的金刚石砂轮上试验修整半径为13 mm的弧形轮廓,最终修整出的弧形轮廓半径为13.006 mm,轮廓误差PV值为10.90 μm。最后,通过磨削氧化铝陶瓷验证了砂轮修整效果。检测磨削工件的弧形轮廓拟合半径为13.012 mm,轮廓误差PV值为11.33 μm。

关键词: 激光修整, 电火花修整, 金刚石砂轮, 弧形砂轮, 复合修整

Abstract:  Affected by the characteristics of laser Gaussian beam, the differences of the spot size and laser energy irradiated on the surface of grinding wheels follound the dressing path, which was difficult to realize high-precision dressing of arc diamond grinding wheels. A compound dressing method was proposed using laser rough dressing and electrical discharge finished dressing. First, the laser dressing method was used to efficiently remove the excess abrasive layers to obtain an arc profile. Then, a high-precision arc electrode was used to match the profile for electrical discharge dressing. In this way,  a higher precision arc grinding wheel might be dressed. An arc profile with a radius of 13 mm was tested on a diamond grinding wheel with a grain size of 120. The radius of the final dressed arc profile is as 13.006 mm, and the PV value of the profile errors is as 10.90 μm. Finally, the grinding wheel dressing effectiveness was verified by grinding alumina ceramics. The fitting radius of the arc profile of workpiece is as 13.012 mm, and the profile error PV value is as 11.33 μm. 

Key words: laser dressing, electrical discharge dressing, diamond grinding wheel, arc-shaped grinding wheel, compound dressing

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