Formation mechanism of exit chipping in drilling hard-brittle material

Dong-xi LÜ; Gang CHEN; De-gang ZHAO; Cong GAO; Hai-bing XU; Qi-tao GUO; Ying-dan ZHU

doi:10.37188/OPE.20212901.0110

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Formation mechanism of exit chipping in drilling hard-brittle material

Micro/Nano Technology and Fine Mechanics | 更新时间：2021-02-04

- Formation mechanism of exit chipping in drilling hard-brittle material
- Optics and Precision Engineering Vol. 29, Issue 1, Pages: 110-116(2021)
- 作者机构：
  
  1.中国科学院宁波材料技术与工程研究所浙江省机器人与智能制造装备技术;重点实验室，浙江宁波 315201
  2.宁波远景汽车零部件有限公司，浙江宁波 315327
  3.重庆长安汽车股份有限公司，重庆 400023
- 作者简介：
- 基金信息：
- DOI：10.37188/OPE.20212901.0110
  CLC： TG663
- Received：29 June 2020，
  
  Revised：21 August 2020，
  
  Published：15 January 2021
- 稿件说明：
移动端阅览
吕东喜,陈刚,赵德刚等.硬脆材料孔加工出口破损形成机理[J].光学精密工程,2021,29(01):110-116.

LÜ Dong-xi,CHEN Gang,ZHAO De-gang,et al.Formation mechanism of exit chipping in drilling hard-brittle material[J].Optics and Precision Engineering,2021,29(01):110-116.
吕东喜,陈刚,赵德刚等.硬脆材料孔加工出口破损形成机理[J].光学精密工程,2021,29(01):110-116. DOI： 10.37188/OPE.20212901.0110.

LÜ Dong-xi,CHEN Gang,ZHAO De-gang,et al.Formation mechanism of exit chipping in drilling hard-brittle material[J].Optics and Precision Engineering,2021,29(01):110-116. DOI： 10.37188/OPE.20212901.0110.

摘要

为研究BK7玻璃孔加工过程中出口破损的形成机理，本文在对破损形貌进行显微观测的基础上，基于断裂力学理论，分析了工件加工面所受载荷随裂纹扩展过程的演变规律及其对出口破损形成过程的影响；采用光滑质点流体动力学法对出口破损的形成过程进行了数值模拟，研究了出口破损的形成机理。结果表明：出口破损可分为初始裂纹区及扩展裂纹区，挤压载荷和弯矩的耦合作用驱使初始裂纹沿圆周方向扩展，显著增加了裂纹的倾斜角度和破损宽度，导致破损表面产生大量散射状条纹；借助光滑质点流体动力学法实现了对出口破损形成及脱落过程的数值模拟，发现初始裂纹贯穿整个未穿透厚度，刀具的瞬时切削力减小了78%；并且随着裂纹间歇性地沿圆周方向扩展，刀具切削力呈现出剧烈的周期性波动特征。

Abstract

This study aims to investigate the formation mechanisms of hole exit chipping in diamond drilling of BK7 glass. Based on the microscopic observations of the chipping morphology and fracture mechanics theory， the evolution of extrusion load exerted on the machining surface with crack propagation was explored and its effects on the chipping formation was analyzed. The smooth particle hydrodynamic method （SPH） was applied to numerically simulate the formation process of exit chipping to investigate its formation mechanisms. Results suggest that the exit-chipping morphology could be divided into the incipient crack area and extended crack area. The coupling effects of the extrusion load and bending moment promoted the incipient crack extended in the circumferential direction， which significantly increased the inclination angle of the crack and width of exit chipping， thereby resulting in the occurrence of scattered stripes on the chipping surface. With the SPH method， the simulation of the chipping formation and shedding processes was realized， revealing that the penetration of incipient crack through the entire unpenetrated thickness could reduce the instantaneous cutting force of the tool by 78%. In addition， the cutting force of tool presented periodic fluctuation characteristics with the circumferential progradation of the incipient crack.

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references

赵培轶 . BK7光学玻璃超声振动磨削脆塑性转变及加工质量研究［D］. 哈尔滨：哈尔滨工业大学， 2017 .

ZHAO P T . Research on Brittle-Ductile Transition and Machining Quality in Ultrasonic Vibration Assisted Grinding of BK7 Optical Glass ［D］. Harbin ： Harbin Institute of Technology ， 2017 . （in Chinese）

朱永伟，李信路，王占奎，等 . 光学硬脆材料固结磨料研磨中的亚表面损伤预测［J］. 光学精密工程， 2017 ， 25 （ 2 ）： 367 - 374 .

ZHU Y W ， LI X L ， WANG ZH K ， et al . . Subsurface damage prediction for optical hard-brittle material in fixed abrasive lapping ［J］. Optics and Precision Engineering ， 2017 ， 25 （ 2 ）： 367 - 374 . （in Chinese）

马利杰，刘红文，屈海涛，等 . 光学玻璃钻削时孔口损伤的形成机理及抑制工艺［J］. 光学精密工程， 2020 ， 28 （ 7 ）： 1528 - 1538 .

MA L J ， LIU H W ， QU H T ， et al . . Formation mechanism and suppression method of hole edge damage in drilling optical glass ［J］. Optics and Precision Engineering ， 2020 ， 28 （ 7 ）： 1528 - 1538 . （in Chinese）

WANG J J ， ZHA H T ， FENG P F ， et al . . On the mechanism of edge chipping reduction in rotary ultrasonic drilling： a novel experimental method ［J］. Precision Engineering ， 2016 ， 44 ： 231 - 235 .

NING F D ， CONG W L ， PEI Z J ， et al . . Rotary ultrasonic machining of CFRP： a comparison with grinding ［J］. Ultrasonics ， 2016 ， 66 ： 125 - 132 .

刘泽祥，康敏，李曙生 . 旋转超声电解复合加工微小深孔的稳定性研究［J］. 机械设计与研究， 2015 ， 31 （ 6 ）： 109 - 112， 118 .

LIU Z X ， KANG M ， LI SH SH . The stability research of micro deep hole machined by rotary combined ultrasonic and electrochemical machining ［J］. Machine Design & Research ， 2015 ， 31 （ 6 ）： 109 - 112， 118 . （in Chinese）

LIU J W ， BAEK D K ， KO T J . Chipping minimization in drilling ceramic materials with rotary ultrasonic machining ［J］. The International Journal of Advanced Manufacturing Technology ， 2014 ， 72 （ 9 / 10 / 11 / 12 ）： 1527 - 1535 .

LV D ， HUANG Y H ， TANG Y J ， et al . . Relationship between subsurface damage and surface roughness of glass BK 7 in rotary ultrasonic machining and conventional grinding processes ［J］. The International Journal of Advanced Manufacturing Technology ， 2013 ， 67 （ 1 / 2 / 3 / 4 ）： 613 - 622 .

BUIJS M ， HOUTEN K K V . Three-body abrasion of brittle materials as studied by lapping ［J］. Wear ， 1993 ， 166 （ 2 ）： 237 - 245 .

WANG J S ， FU J G ， WANG J L ， et al . . Processing capabilities of micro ultrasonic machining for hard and brittle materials： SPH analysis and experimental verification ［J］. Precision Engineering ， 2020 ， 63 ： 159 - 169 .

吕东喜，王洪祥，唐永健，等 . 旋转超声加工中磨粒冲击作用的仿真分析［J］. 哈尔滨工业大学学报， 2013 ， 45 （ 3 ）： 50 - 55 .

LÜ D X ， WANG H X ， TANG Y J ， et al . . Simulation analysis on the impact effects of the abrasive in rotary ultrasonic machining process ［J］. Journal of Harbin Institute of Technology ， 2013 ， 45 （ 3 ）： 50 - 55 . （in Chinese）

JOHNSON G R ， HOLMQUIST T J . A computational constitutive model for brittle materials subjected to large strains， high rates， and high pressure ［C］. Shock Wave and High Strain Rates and High Pressures ， New York ， USA ， 1992 ： 1075 - 1081 .

吕东喜，黄燕华，唐永健，等 . 基于SPH算法的磨粒冲击工件表面过程数值模拟［J］. 振动与冲击， 2013 ， 32 （ 7 ）： 169 - 174 .

LÜ D X ， HUANG Y H ， TANG Y J ， et al . . Simulating process of abrasive impacting a workpiece surface based on SPH method ［J］. Journal of Vibration and Shock ， 2013 ， 32 （ 7 ）： 169 - 174 . （in Chinese）

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