Journal
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
Volume 116, Issue 5-6, Pages 1437-1450Publisher
SPRINGER LONDON LTD
DOI: 10.1007/s00170-021-07031-4
Keywords
Burr formation model; Tool wear; Ploughing force; Drilling thrust force; Burr height; thickness
Funding
- Natural Sciences and Engineering Research Council of Canada
- Zhejiang Provincial Natural Science Foundation of China [LGG18E050018]
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This paper introduces a new burr formation model to predict drilling burr sizes while taking tool wear into account. Experimental validation shows that burr height and thickness increase with tool wear.
This paper presents a new burr formation model for predicting drilling burr sizes in consideration of tool wear. A new force model is established by combining the drilling thrust force with the ploughing force caused by tool wear. The traditional drilling burr formation model is modified by using the new force model to determine burr heights and thicknesses in terms of tool wear percentage. A series of drilling experiments are carried out on two commonly used aerospace aluminiums to validate and calibrate the model. A close agreement between simulation and experiment is achieved showing that burr height and thickness increase with the increase in tool wear, and at 50% of tool wear, the maximum burr height could triple and the maximum burr thickness could double.
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