Development of Monitor for Grinding Phenomena using Wavelet Transform of Grinding Sound

利用磨削声音小波变换监测磨削现象的研制

• 批准号: 10555045
• 负责人: YAGISHITA Fukuzo
• 金额: $ 4.16万
• 依托单位: Numazu College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10555045/
• 关键词: Grinding sound; AE(Acoustic emission) signal; Wavelet tranform; Redress life of grinding wheel; Monitor for grinding phenomena

The apparatus, which was newly developed in order to process the signal of grinding sound, detects the elastic wave, which propagates through the workpiece and electromagnetic chuck, by an AE (Acoustic emission) sensor. After applying Wavelet transform to the elastic wave signal, the result is output as a three-dimensional color diagram formed by frequency, time and spectral intensity.By applying the monitor for grinding phenomena to a series of surface plunge grinding by vitrified boded WA wheel, GC wheel and also a cylindrical plunge grinding by vitrified bonded CBN wheel in a production shop, the following conclusions are conducted.(1)By excuting Wavelet transform as data processing of the AE signal, which occurs in the grinding region between the wheel and workpiece material, the frequency component caused by the fracture or wear of abrasive grain and bond material is separated from that caused by the workpiece material.(2)In the surface grinding by WA wheel the components at near … More 3 kHz and 9 kHz are caused by the fracture of WA (white alundum) grain and workpiece material S45C repectivery. On the other hand, in the surface grinding by GC wheel the components at near 2 kHz and 10 kHz are caused by the fracture of GC (green carborundum) grain and workpiece material FC25 respectively.(3)By monitoring the intensity of the frequency component caused by the fracture of abrasive grain in the progress of grinding operation, the monitor developed enables us to decide the redress life of grinding wheel scientifically and reasonably instead of the excellent sense and experiment by a skilled machinest.(4)The trouble, that is, the initial grinding power after truing-dressing operation becomes large extremely besides the intial surface ground roughness is inferior to the expected value, occurs often during grinding operation by CBN wheel in many production shops. The cause of trouble have been revealed by applying the monitor.(5)By monitoring the intensity of the frequency component caused by the fracture of workpiece material during grinding brittle materials such as Silicon wafer, ferrite, ceramic, glass and so on, the monitor enables us to detect the occurrence of workpiece having substandard accuracy in the grinding operation. Less

该设备是为了处理磨削声音信号而新开发的，通过 AE（声发射）传感器检测通过工件和电磁吸盘传播的弹性波，然后对弹性波信号进行小波变换。结果以由频率、时间和光谱强度形成的三维彩色图的形式输出。通过将磨削现象监控器应用于陶瓷体WA砂轮、GC砂轮以及陶瓷砂轮的一系列表面切入磨削，通过在生产车间使用陶瓷结合剂CBN砂轮进行外圆切入磨削，得到以下结论。(1)通过对砂轮与工件材料之间磨削区域中发生的AE信号执行小波变换作为数据处理，得到频率分量由磨粒和结合剂材料的断裂或磨损引起的与工件材料引起的分离。(2)在WA砂轮表面磨削中，引起3 kHz和9 kHz附近的分量另一方面，在GC砂轮表面磨削中，2kHz和10kHz附近的成分是由GC（绿金刚砂）晶粒和工件材料的断裂引起的。 (3)通过监测磨削过程中磨粒断裂引起的频率分量的强度，开发的监视器使我们能够确定矫正寿命科学合理地磨削砂轮，而不是熟练机械人员的卓越感觉和实验。（4）除了初始表面磨削粗糙度低于预期外，还存在修整操作后初始磨削功率变得极大的问题。值，在许多生产车间的CBN砂轮磨削操作中经常出现，通过应用监测器揭示了故障原因。（5）通过监测脆性材料磨削过程中工件材料断裂引起的频率分量的强度。作为硅晶圆、铁氧体、陶瓷、玻璃等，该监控器使我们能够在磨削操作中检测到​​精度不合格工件的出现。

项目成果

柳下福蔵: "研削音のデータ処理による研削状態モニタ装置の開発(第3報)-CBNホイールによるプランジカットの場合-"1998年度精密工学会春季大会学術講演会講演論文集. P15. 688 (1998)

Fukuzo Yanagishita：“利用磨削声音数据处理的磨削状态监测装置的开发（第3次报告）-以CBN砂轮进行切入切削的情况-”1998年日本精密工程学会春季会议学术会议记录P15。 (1998)

H.Yagishita: "Development of Monitor for Grinding Phenomena using Data Processing of Grinding Sound (3nd Report)-A Case of Plunge Grinding by CBN Wheel-"Proceedings of 1998 Spring Annual Meeting of JSPE. P15. 688 (1998)

H.Yagishita：“使用磨削声音数据处理的磨削现象监视器的开发（第3次报告）-CBN砂轮插进磨削的案例-”JSPE 1998年春季年会论文集。

H.Yagishita: "Development of Monitor for Grinding Phenomena using Data Processing of Grinding Sound"Advances in Abrasive Technology III published by SGE(Proceedings of ISAAT2000 in Hawaii). 313-320 (2000)

H.Yagishita：“Development of Monitor for Grinding Phenomena using Data Handling of Grinding Sound”SGE出版的Advances in Abrasive Technology III（夏威夷ISAAT2000论文集）。

柳下福蔵、江副正人: "研削音のデータ処理による研削状態モニタ装置の開発(第3報)-CBNホイールによるプランジカットの場合-" 1998年度精密工学会春季大会学術講演会講演論文集. P15. 688 (1998)

Fukuzo Yanagishita、Masato Ezoe：“利用磨削声音数据处理的磨削状态监测装置的开发（第3次报告）-以CBN砂轮进行切入切削的情况-”1998年精密工程学会春季会议学术会议论文集P15。 .688（1998）

柳下福蔵: "研削音のデータ処理による研削状態モニタ装置の開発(第2報)-ウェーブレット変換を適用した場合-"1997年度精密工学会秋季大会学術講演会講演論文集. I37. 401 (1997)

柳下福三：“利用磨削声音数据处理的磨削状态监测装置的开发（第2次报告）-应用小波变换时-”1997年日本精密工程学会秋季会议学术会议论文集I37（1997）。