| 刘雪勇， 王明红.阶梯钻钻削AISI4340的轴向力和刀具温度研究[J].轻工机械,2021,39(4):44-50 |
| 阶梯钻钻削AISI4340的轴向力和刀具温度研究 |
| Study on Axial Force and Tool Temperature of AISI4340 in Step Drilling |
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| DOI：10.3969/j.issn.1005 2895.2021.04.009 |
| 中文关键词: 阶梯钻 高强度钢；主轴转速；进给量；顶角；轴向力 |
| 英文关键词:step drill high strength steel AISI4340 spindle speed feed rate vertex angle axial force |
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| 中文摘要: |
| 针对高强度钢AISI4340钻削过程中存在轴向力大、钻削温度高、刀具磨损严重等问题，课题组在普通麻花钻的基础上设计了一种阶梯钻，利用DEFORM 3D有限元软件对阶梯钻钻削AISI4340的过程进行仿真研究，对阶梯钻的轴向力形成理论进行分析，研究主轴转速、进给量和顶角等3个因素对轴向力和钻头最高温度的影响规律，并与普通麻花钻进行对比。结果表明：主轴转速对轴向力的影响最小，顶角对钻头最高温度的影响最小，[JP2]阶梯钻在降低轴向力和减小刀具磨损方面比麻花钻更有优势；同时发现，当阶梯钻主轴转速取2 500 r·min-1，进给量取0.1 mm·r-1，第1顶角取118°时，得到的轴向力最小，钻头温度分布较为理想。研究的结果对实际钻削AISI4340参数的选择提供了一定的参考。 |
| 英文摘要: |
| Aiming at the problems of large axial force, high drilling temperature and severe tool wear in the drilling process of high strength steel AISI4340, a step drill based on ordinary twist drills was designed. The drilling process of AISI4340 with step drill was simulated, and the theory of axial force formation of step drill was analyzed. The influence of spindle speed, feed rate and vertex angle on the axial force and the maximum temperature of the drill bit was studied and compared with that of ordinary twist drills. The results show that the spindle speed has the least influence on the axial force, and the vertex angle has the least influence on the maximum temperature of the drill bit. The step drill is more advantageous than the twist drill in reducing the axial force and reducing tool wear. At the same time, it is found that when the spindle speed of the step drill is 2 500 r·min-1, the feed rate is 0.1 mm·r-1, and the first point angle is 118°, the obtained axial force is the smallest and the bit temperature distribution is ideal. The research results provide a certain reference for the selection of actual drilling AISI4340 parameters. |
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