{"title":"A feasibility study of on-line drill wear monitoring by DDS methodology","authors":"Pulak Bandyopadhyay , Evers Molina Gonzalez , Ren Huang , S.M. Wu","doi":"10.1016/0020-7357(86)90003-X","DOIUrl":null,"url":null,"abstract":"<div><p>A new approach to achieve on-line drill life monitoring is introduced using the Dynamic Data System (DDS) methodology. Changes in the thrust and torque of the drilling process were investigated. A static analysis provided poor correlation and low sensitivity between average thrust/torque and drill flank wear. The dynamic parameters (natural frequencies and damping ratios) of the drilling process were strongly related with the average drill flank wear. Hence, a new parameter “Normalized Damping Ratio” (NDR) was formed from the DDS analysis using the dynamic part of the signal which correlates with drill wear. The possibility of developing an on-line drill flank wear monitoring scheme using the NDR index is pointed out.</p></div>","PeriodicalId":100704,"journal":{"name":"International Journal of Machine Tool Design and Research","volume":"26 3","pages":"Pages 245-257"},"PeriodicalIF":0.0000,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0020-7357(86)90003-X","citationCount":"19","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Machine Tool Design and Research","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/002073578690003X","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 19
Abstract
A new approach to achieve on-line drill life monitoring is introduced using the Dynamic Data System (DDS) methodology. Changes in the thrust and torque of the drilling process were investigated. A static analysis provided poor correlation and low sensitivity between average thrust/torque and drill flank wear. The dynamic parameters (natural frequencies and damping ratios) of the drilling process were strongly related with the average drill flank wear. Hence, a new parameter “Normalized Damping Ratio” (NDR) was formed from the DDS analysis using the dynamic part of the signal which correlates with drill wear. The possibility of developing an on-line drill flank wear monitoring scheme using the NDR index is pointed out.
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