• CN:11-2187/TH
  • ISSN:0577-6686

›› 2011, Vol. 47 ›› Issue (7): 178-184.

• 论文 • 上一篇    下一篇

纤维状聚晶金刚石复合片刀具的切削性能及刀具磨损机理

邓朝晖;伍俏平;张高峰;张璧;汪哲能   

  1. 湖南大学国家高效磨削工程技术研究中心;湖南大学机械与运载工程学院;湘潭大学机械工程学院
  • 发布日期:2011-04-05

The Cutting Performance and Wear Mechanisms of a New Polycrystalline Diamond Compacts Cutter Tool

DENG Zhaohui;WU Qiaoping;ZHANG Gaofeng;ZHANG Bi;WANG Zheneng   

  1. National Engineering Research Center For High Efficiency Grinding, Hunan University College of Mechanical & Vehicle Engineering, Hunan University College of Mechanical & Engineering, Xiangtan University
  • Published:2011-04-05

摘要: 设计并制备一种纤维状聚晶金刚石复合片(Polycrystalline diamond compacts, PDC)刀具,制备的PDC刀具具有同时参与切削的刀刃多、刀刃间隔距离和切削角度可人为控制、刃口锋利平直等特点。开展了新型PDC刀具与金刚石砂轮在相同条件下加工WC/12Co涂层的对比试验。结果表明,制备的PDC刀具能获得与金刚石砂轮磨削相媲美的加工质量,实现WC/12Co涂层硬脆材料的精密加工;同时其具有良好的容屑空间,断续切削的结构特点使其更容易散热,因此,切削加工过程中又可以适当地提高切削参数实现材料的高效加工。PDC刀具在长时间的加工过程中,由于受到频繁的冲击作用,在PDC刀具的后刀面出现了小凹坑和轻微的磨粒磨损,随着切削的进行,在切刃处出现局部崩刃现象,须对其刃磨。

关键词: WC/12Co涂层, 表面粗糙度, 表面质量, 聚晶金刚石复合片刀具, 磨损机理, 切削力

Abstract: A new polycrystalline diamond compacts cutter which replaces the abrasives in a grinding wheel or the inserts in a cutting tool with PDC fibers is prepared. The new PDC cutter has fibers that are artificially ordered so as to have the desired geometric angles and edge space among themselves, and it has a larger number of the cutting edges than the conventional cutting tools. And further compares the machining performance of the PDC cutter with the diamond grinding wheel in machining the WC/12Co coating. The experimental results indicate that the quality of the machined work-piece surface is equal to that machined by diamond grinding wheel, and the high machining efficiency can been achieved by increasing cutting parameters. The wear test indicate that the PDC cutter exhibits pits and slight abrasive wear due to the concussion with the work-pieces in the process of cutting, the cutting edge of the PDC cutter appears tipping, and it need to be sharpened again.

Key words: Cutting force, Polycrystalline diamond compacts cutter, Roughness, Surface-quality, WC/12Co coating, Wear mechanism

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