The effects of pilot hole geometry on tool-work engagement efficacy in deep hole drilling

被引：18
|
作者：
Chaudhari, Akshay [1 ]
Malarvizhi, S. [1 ]
Woon, Keng Soon [2 ]
Kumar, A. Senthil [1 ]
Rahman, Mustafizur [1 ]
机构：
[1] Natl Univ Singapore, Singapore 119260, Singapore
[2] Singapore Inst Mfg Technol, Singapore 638075, Singapore
来源：
JOURNAL OF MANUFACTURING PROCESSES | 2015年 / 19卷
关键词：
Deep hole drilling; Inconel; 718; Drill engagement; Single-lip drill; INCONEL-718; MECHANISMS;
D O I：
10.1016/j.jmapro.2015.06.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Deep hole drilling using single-lip drill (SLD) without a starting bush induces a severe cutting edge chipping if the pilot hole profile is not selected properly. In this paper, a new parameter 'Engagement Ratio' (ER) is introduced to determine appropriate pilot hole profile. ER depends on pilot hole and tool geometry combination. Application of ER is illustrated with geometrical model for four different engagement conditions. The range of values of ER for Inconel 718 was defined based on experimental results to ensure smooth engagement. Moreover, this approach can be extended to select the pilot hole geometry for other materials. (C) 2015 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：135 / 141
页数：7
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