摘要
本文提出一种基于热—力耦合理论的刀具结构设计方法,基于DEFROM 2D/3D软件设计通过硬质合金平头倒角立铣刀,并进行高速铣削7075 合金钢的仿真实验,在主轴转速为4000r/min、进给速度为2000mm/min、切削深度为0.1mm的参数下,对影响切削力和切削热的主要刀具结构参数(前角、后角、螺旋角及刀具刃数)进行了仿真研究.研究表明,在此工艺环境下,当结构参数为前角15°、后角10°、螺旋角35°及四刃的刀具齿数时,设计刀具相较于普通刀具的最大切削力下降4.1%,平均切削力下降5%,切削热下降7.4%.
Abstract
This paper proposes a tool structure design method based on the thermal-mechanical coupling theory.Based on the simulation experiment of high-speed milling 7075 alloy steel with a carbide flat head chamfered end mill and the DE-FROM 2D/3D software,the main tool structural parameters affecting cutting force and heat,such as rake angle,rake angle,spiral angle,and number of cutting edges,are simulated and studied under the parameters of spindle rotation speed of 4000r/min,feed speed of 2000mm/min,and cutting depth of 0.1mm.The research shows that under this technological envi-ronment,when the front angle is 15°,the back angle is 10°,the spiral angle is 35°,and the number of teeth of the four edge cutting tool,the cutting force and cutting heat of the cutting tool will be better improved compared to other structural param-eters,thereby improving the tool structure design method.
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