东北大学学报(自然科学版) ›› 2024, Vol. 45 ›› Issue (7): 1011-1019.DOI: 10.12068/j.issn.1005-3026.2024.07.013

• 机械工程 • 上一篇    下一篇

单颗CBN磨粒超声振动辅助磨削AISI 304材料去除机理

杨震宇, 邹平(), 周亮, 王安琪   

  1. 东北大学 机械工程与自动化学院,辽宁 沈阳 110819
  • 收稿日期:2023-03-17 出版日期:2024-07-15 发布日期:2024-10-29
  • 通讯作者: 邹平
  • 作者简介:杨震宇(1994-),男,江苏宜兴人,东北大学博士研究生
  • 基金资助:
    国家自然科学基金资助项目(51875097);中央高校基本科研业务费专项资金资助项目(N2203001)

Material Removal Mechanism During Ultrasonic Vibration Assisted Grinding AISI 304 with Single CBN Grain

Zhen-yu YANG, Ping ZOU(), Liang ZHOU, An-qi WANG   

  1. School of Mechanical Engineering & Automation,Northeastern University,Shenyang 110819,China.
  • Received:2023-03-17 Online:2024-07-15 Published:2024-10-29
  • Contact: Ping ZOU
  • About author:ZOU PingE-mail:pzou@mail.neu.edu.cn

摘要:

为了解释超声作用下磨粒切削材料的去除机理,对单粒磨削过程进行了分析,建立了未变形切削厚度和磨粒与试件的固定速度比(vs/vw)的数学模型.在AISI 304 试件上进行了固定速度比的普通磨削(conventional grinding,CG)、切向超声振动辅助磨削(tangential ultrasonic vibration assisted grinding,TUVAG)以及径向超声振动辅助磨削(radial ultrasonic vibration assisted grinding,RUVAG)的单颗粒试验.结果表明,在固定速度比条件下,试件在CG与TUVAG作用下都是以塑性变形的形式去除,但超声辅助显著提高了材料去除率.试件在RUVAG作用下材料的去除方式与未变形切削最大厚度agmax的值息息相关. agmax小于0.8 μm时,试件表现为脆性断裂的形式去除;之后随着agmax逐渐增大,试件转变为塑性变形的形式去除.

关键词: 单颗CBN(立方氮化硼)磨粒, 未变形切削厚度, 超声振动辅助磨削, 表面形貌, 材料去除机理

Abstract:

In order to explain the removal mechanism of abrasive cutting materials under ultrasonic action, the single grain grinding process was analyzed, and the mathematical model of undeformed cutting thickness and the fixed velocity ratio (vs/vw) of abrasive and workpiece was established. The single grain tests of conventional grinding (CG), tangential ultrasonic vibration assisted grinding (TUVAG) and radial ultrasonic vibration assisted grinding (RUVAG) with a fixed speed ratio were carried out on AISI 304 specimens. The results showed that the specimens are removed by plastic deformation under the action of CG and TUVAG at the fixed speed ratio, but the ultrasound significantly improves the material removal rate. The material removal method of the specimen under RUVAG was closely related to the value of the maximum undeformed cutting thickness agmax. When agmax is less than 0.8 μm, the specimen was removed in the form of brittle fracture. After that, with the increase of agmax, the specimen was removed in the form of plastic deformation.

Key words: single CBN(cubic boron nitride) grain, undeformed cutting thickness, ultrasonic vibration assisted grinding, surface topography, material removal mechanism

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