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超细晶硬质合金刀具车削不锈钢的切削温度研究
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河北省教育厅资助项目(QN2016162);河北省科技厅项目(16211027)


Study on Cutting Temperature in Stainless Steel Turning with Ultrafinegrain Cemented Carbide Tools
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    摘要:

    超细晶硬质合金刀具由于具有更高的硬度和抗弯强度,可以满足现代制造业的更高要求,在难加工材料高速切削领域显示出明显优势。在不锈钢材料的加工过程中,切削温度对刀具的磨损有极大的影响,而多数实验方法很难测得刀具表面具体的温度分布。借助DEFORM仿真分析软件,模拟超细晶硬质合金刀具对304不锈钢的车削过程;依据正交试验方法,分析切削用量三要素切削速度、进给量和背吃刀量对刀具温度的影响规律;通过实际车削实验与仿真结果进行比较,并与普通晶粒硬质合金刀具进行对比。结果表明:与普通晶粒硬质合金刀具加工相似,切削速度对超细晶粒硬质合金刀具温度的影响程度最大,其次是进给量,最后是背吃刀量;超细晶粒硬质合金比普通晶粒硬质合金刀具具有更好的散热性,尤其在较高速度条件下切削,优势更加明显。

    Abstract:

    Due to higher hardness and bending strength, ultrafinegrain cemented carbide tools can satisfy the higher requests of modern manufacturing, and it has shown obvious advantages in the field of high speed cutting of difficulttomachine material. In the machining of stainless steel, the cutting temperature has a great influence on the tool wear, and using most experimental methods are difficult to measure the specific temperature distribution on cutting tool. The processes of 304 stainless steel turning by ultrafinegrain cemented carbide cutting tools were simulated based on DEFORM software. The influences of cutting parameters, such as cutting speed, feed and cutting depth on tool temperature were analyzed by orthogonal experiment. Simulation results and cutting experiment results were compared, and the contrast cutting experiments with ultrafinegrain cemented carbide tools and conventional cemented carbide tools were carried out. The results show that the influences of cutting parameters on the temperature of ultrafinegrain cemented carbide tools are similar to conventional cemented carbide tools, cutting speed has the main influence on temperature followed by feed rate and cutting depth. Ultrafinegrain cemented carbide tools have better heat dissipation than conventional cemented carbide tools, the advantages are more obvious at higher speed conditions especially.

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张好强,王莉娜,侯锁霞,张舵,王鑫阁.超细晶硬质合金刀具车削不锈钢的切削温度研究[J].机床与液压,2019,47(5):30-34.
. Study on Cutting Temperature in Stainless Steel Turning with Ultrafinegrain Cemented Carbide Tools[J]. Machine Tool & Hydraulics,2019,47(5):30-34

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  • 在线发布日期: 2019-07-16
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