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宁波大学 机械工程与力学学院, 浙江 宁波 315211
Received:29 August 2022,
Published Online:19 July 2023,
Published:30 June 2023
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Guilin WANG, Aibing YU, Pian ZOU, et al. Theoretical Model of Drilling Force Considering Geometrical Parameters of Chamfered Edge of Spade Drill[J]. Acta Armamentarii, 2023, 44(6): 1733-1743.
Guilin WANG, Aibing YU, Pian ZOU, et al. Theoretical Model of Drilling Force Considering Geometrical Parameters of Chamfered Edge of Spade Drill[J]. Acta Armamentarii, 2023, 44(6): 1733-1743. DOI: 10.12382/bgxb.2022.0753.
为铲钻倒棱刃口的设计、开发和应用提供参考
建立考虑倒棱刃口几何参数的铲钻钻削力模型。基于正交切削理论
引入材料因刃口挤压产生形变的几何系数
建立倒棱刃口铲钻相对于主切削刃方向的切向力和法向力模型
根据铲钻切削刃的实际加工计算出铲钻的轴向力和扭矩。考虑分屑槽对铲钻钻削力的影响
使用变形系数代替剪切角和摩擦系数。采用有限元模拟铲钻钻削过程
进行铲钻的钻削力测试实验
得到铲钻的轴向力、扭矩
并将倒棱刃口铲钻的钻削力与锋利刃口的钻削力进行对比。研究结果表明:建立的钻削力理论公式适用于计算倒棱刃口铲钻轴向力和扭矩的计算
得到了倒棱刃口宽度和角度对铲钻钻削力的影响规律;设计铲钻刀具倒棱刃口时
铲钻刃口的倒棱宽度选择0.1mm
倒棱角度选择10°或30°可以获得较低的钻削力。
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 0.1mm
and the chamfer angle should be 10° or 30° to obtain a low drilling force.
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