Recognition of removal performance of BK7 glass by taking advantages of status signal features

BI Guo; GUO Xin-qian; SUN Zhi-ji; XU Tao-lin

doi:10.3788/OPE.20162413.0394

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Recognition of removal performance of BK7 glass by taking advantages of status signal features

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- Recognition of removal performance of BK7 glass by taking advantages of status signal features
- Optics and Precision Engineering Vol. 24, Issue 10s, Pages: 394-399(2016)
- 作者机构：
  
  厦门大学航空航天学院,福建厦门,361005
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20162413.0394
  CLC： TH162+.1
- Received：07 May 2016，
  
  Revised：10 June 2016，
  
  Published：14 November 2016
- 稿件说明：
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毕果, 郭昕乾, 孙郅佶等. 利用状态信号特征识别BK7玻璃的去除性能[J]. 光学精密工程, 2016,24(10s): 394-399

BI Guo, GUO Xin-qian, SUN Zhi-ji etc. Recognition of removal performance of BK7 glass by taking advantages of status signal features[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 394-399
毕果, 郭昕乾, 孙郅佶等. 利用状态信号特征识别BK7玻璃的去除性能[J]. 光学精密工程, 2016,24(10s): 394-399 DOI： 10.3788/OPE.20162413.0394.

BI Guo, GUO Xin-qian, SUN Zhi-ji etc. Recognition of removal performance of BK7 glass by taking advantages of status signal features[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 394-399 DOI： 10.3788/OPE.20162413.0394.

摘要

搭建了金刚石磨粒划擦实验台，对BK7玻璃进行斜坡划刻和等切深划刻，采集过程中的声发射信号和力信号，得到其典型特征，实验结果表明过程信号特征能够实时准确表征脆性材料的去除过程，大的刀具角度对裂纹的产生和扩展起抑制作用，其划刻过程中的力和声发射信号幅值波动较为平缓，小的刀具角度以及切削刃的增加则会引起更显著的脆性断裂，其表现为力和声发射信号幅值波动的加剧，三类金刚石压头划刻BK7光学玻璃实验表明，脆性去除阶段，BK7光学玻璃存在明显的切深转折点，超过该切深时，材料会产生更大的脆性破坏，相应的声发射能量增长率也显著提高，具体数值与压头类型有关。研究结果有利于在实际加工中可以利用过程信号优化加工参数，平衡脆性材料加工中加工效率和加工质量的矛盾。

Abstract

The experiment table for scratching of grinding material of diamond has been established

and the BK7 glass is scratched aslope and cut in deeply for scratching. Collect acoustic emission signal and force signal in the process

and then obtain its typical features. Experimental results show that the process signal features may represent the removal process of hard brittle material with real time and accuracy. Great cutting-tool angle has inhibiting effect on production and extension of crack

and the amplitude fluctuation of force and acoustic emission signals in the scratching process is relatively slow; while small cutting-tool angle and the increase of cutting edge may give rise to more obvious brittle fracture

and it represents that the amplitude fluctuation of force and acoustic emission signals is heightened. Experiments of BK7 optical glass for scratching of three diamond indenters have show that:in the phase of brittle removal

the obvious cutting-in turning point exists for BK7 optical glass; when exceeding such cutting-in point

materials will generate greater brittle failure

and corresponding growth rate of acoustic emission energy may also be increased. Specific value has connection with type of indenter. Research results are beneficial to balance of contradiction between processing efficiency and processing quality of hard brittle materials in the process by taking advantages of optimization processing parameters of process signals in the actual processing.

关键词

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references

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