• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2017, Vol. 53 ›› Issue (19): 187-194.doi: 10.3901/JME.2017.19.187

• 数字化设计与制造 • 上一篇    下一篇

加压内冷却砂轮的研制及磨削性能研究

彭锐涛1, 张珊1, 唐新姿1, 陈睿1, 周专2   

  1. 1. 湘潭大学机械工程学院复杂轨迹加工工艺及装备教育部工程研究中心 湘潭 411105;
    2. 中国航发湖南南方宇航工业有限公司 株洲 412002
  • 收稿日期:2017-01-07 修回日期:2017-09-01 出版日期:2017-10-05 发布日期:2017-10-05
  • 通讯作者: 彭锐涛(通信作者),男,1982年出生,副教授,博士研究生导师。主要研究方向为难加工材料的高效加工,E-mail:pengruitao@xtu.edu.cn
  • 作者简介:周专,男,1963年出生,高级工程师,研究生导师,中国航发湖南南方宇航工业有限公司党委副书记,
  • 基金资助:
    国家自然科学基金(51475404,51305377)、湖南省自然科学基金委员会-株洲市人民政府自然科学联合基金重点项目(13JJ8007)和湖南省普通高校青年骨干教师培养经费(20151053008gg)资助项目。

Development and Grinding Performance of a Pressurized Internal Cooling Slotted Grinding Wheel

PENG Ruitao1, ZHANG Shan1, TANG Xinzi1, CHEN Rui1, ZHOU Zhuan2   

  1. 1. Engineering Research Center of Ministry of Education for Complex Track Processing Technology & Equipment, School of Mechanical Engineering, Xiangtan University, Xiangtan 411105;
    2. AECC Hunan South Astronautics Industry Co., LTD, Zhuzhou 411105
  • Received:2017-01-07 Revised:2017-09-01 Online:2017-10-05 Published:2017-10-05

摘要: 针对高温合金材料在磨削加工过程中存在磨削烧伤问题,为避免气障效应并强化冷却液在磨削弧区的换热效果,提出采用加压式内冷却断续磨削方法。利用数值模拟方法和3D打印技术对砂轮基体、加压内冷却系统和密封结构等进行设计和验证,制备了用于平面磨削的加压内冷却开槽CBN砂轮。在相同的磨削加工参数条件下,使用加压内冷却方法与外部喷射冷却方法进行镍基高温合金磨削对比试验,分析了砂轮速度、磨削深度和工件进给速度等加工参数对磨削温度、加工表面粗糙度和表面形貌的影响规律,验证了加压内冷却断续磨削方法对磨削弧区的强化换热效果。结果表明:在相同试验参数条件下磨削镍基高温合金,加压内冷却法比外部喷射冷却法的换热效率更高,得到的磨削温度更低,表面粗糙度更小,加工表面更为光滑细腻。

关键词: 断续磨削, 高温合金, 加压内冷却, 磨削表面质量, 磨削温度

Abstract: In view of workpiece burnout in grinding of superalloy material,the intermittent grinding technology and pressurized internal-cooling method are combined and proposed to avoid the air barrier effect and then strengthen the heat transfer effect of coolant in grinding contact zone. The grinding wheel body,internal cooling system and the sealing structure are designed and verified based on numerical simulation method and 3D printing technology,subsequently a slotted CBN grinding wheel with pressurized internal-cooling system in surface grinding is prepared. Grinding experiments for nickel-based superalloy with different cooling methods,i.e. pressurized internal-cooling method and external spraying method,are carried out under the same grinding parameters. The influence of wheel method,grinding depth and workpiece feed rate on grinding temperature,surface roughness and surface topography are studied,the heat transfer enhancement of pressurized internal-cooling method in grinding contact zone is validated. The results indicate that using slotted grinding wheel with pressurized internal-cooling system can effectively enhance the heat transfer efficiency,reduce the grinding temperature and surface roughness,furthermore leads to better surface topography.

Key words: grinding surface quality, grinding temperature, intermittent grinding, pressurized internal-cooling, superalloy

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