Theoretical Model of Drilling Force Considering Geometrical Parameters of Chamfered Edge of Spade Drill

被引：0
|
作者：
Wang G. [1 ]
Yu A. [1 ]
Zou P. [1 ]
Li Y. [1 ]
Li K. [1 ]
Wu S. [1 ]
机构：
[1] Faculty of Mechanical Engineering and Mechanics, Ningbo University, Zhejiang, Ningbo
来源：
Binggong Xuebao/Acta Armamentarii | 2023年 / 44卷 / 06期
关键词：
chamfered edges; drilling force; spade drilling tools; theoretical model;
D O I：
10.12382/bgxb.2022.0753
中图分类号：
学科分类号：
摘要：
To provide reference for the design, development and application of the chamfered edge of the spade drill, the drilling force model of the spade drill considering the geometric parameters of the chamfered edge was established. Based on the orthogonal cutting theory, the geometric coefficient of the workpiece material deformation due to extrusion of the chamfered edge was introduced. The tangential force and normal force models of the chamfered spade drill relative to the direction of the main cutting edge were established. The axial force and torque of the spade drill were calculated according to the actual machining of its cutting edge. Considering the influence of the chip-split grooves on the drilling force of the spade drill, the deformation coefficient was used instead of shear angle and friction coefficient. The finite elements were employed to simulate the spade drilling process. The drilling force of the spade drill was tested experimentally. The axial force and torque of the spade drill were obtained. The drilling force of the spade drill with chamfered edge was compared with the drilling force of the ool with sharp cutting-edge. The results show that: the theoretical formula of drilling force established is suitable for calculating the axial force and torque of spade drills with chamfered edges; the influence law of the geometric parameters of the chamfer edge to the drilling force of the spade drill was obtained; when designing the chamfered edge of spade drills, the chamfer width of the spade drill should be 0. 1 mm, and the chamfer angle should be 10° or 30° to obtain a low drilling force. © 2023 China Ordnance Society. All rights reserved.
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页码：1733 / 1743
页数：10
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