摘要
大量研究已深入分析了切削刃几何参数对麻花钻钻孔性能的影响,但针对螺旋排屑槽几何结构的研究仍存在不足。本文建立了成型砂轮圆弧半径与麻花钻螺旋槽截面轮廓半径的定量关系模型,通过改变砂轮三段圆弧半径R_(1)、R_(2)、R_(3)来确定螺旋槽几何形状。为探究R_(1)和R_(2)的影响规律,设计了UD、SU、GD三种典型螺旋槽结构,并选取切削温度、切削力、切屑形态和刀具磨损作为关键评价指标,通过切削实验对C45钢的钻削性能进行系统评估。研究结果表明:在相同钻孔条件下,GD型麻花钻表现出最小轴向力、最稳定的切削温度波动、最优异的切屑形态以及最佳的耐磨性,而UD型麻花钻和SU型麻花钻的钻削性能差异不大。因此,适当减少R_(2)能够显著提升切削性能,而改变R_(1)对切削性能的影响较小。
Extensive research has thoroughly analyzed the impact of cutting edge geometry parameters on the drilling performance of twist drills,yet studies focusing on the geometric structure of spiral chip flutes remain insufficient.This paper established a quantitative relationship model between the arc radius of the forming grinding wheel and the crosssectional profile radius of the spiral flute of a twist drill.The geometric shape of the spiral flute was determined by changing the three arc radii of the grinding wheel,namely R_(1),R_(2),and R_(3).To investigate the influence of R_(1) and R_(2),three typical spiral flute structures,namely UD,SU,and GD,were designed,with cutting temperature,cutting force,chip morphology,and tool wear chosen as key evaluation indicators.The drilling performance on C45 steel was systematically assessed through experiments.The results indicate that under identical drilling conditions,the GD-type twist drill exhibits the lowest axial force,the most stable fluctuation in cutting temperature,the optimal chip morphology,and the best wear resistance.In contrast,the drilling performance of the UD-type and SU-type twist drills shows little difference.Therefore,appropriately reducing R_(2) can significantly enhance cutting performance,while changes to R_(1) have a minor impact on cutting performance.
作者
黄梓霖
刘战强
赵金富
王兵
汪澎洋
江爱胜
王吉波
李玉成
Huang Zilin;Liu Zhanqiang;Zhao Jinfu;Wang Bing;Wang Pengyang;Jiang Aisheng;Wang Jibo;Li Yucheng(School of Mechanical Engineering,Shandong University,Jinan Shandong 250061,China;Key Laboratory of High-Efficiency and Clean Mechanical Manufacture(Shandong University),Ministry of Education,Jinan Shandong 250061,China;State Key Laboratory of Internet of Things for Smart City,University of Macao,Macao 999078,China;State Key Laboratory of Cemented Carbide,Zhuzhou Hunan 412000,China;Zhuzhou Cemented Carbide Cutting Tools Co.,Ltd.,Zhuzhou Hunan 412000,China;Suzhou Gold Cutting Precision Technology Co.,Ltd.,Suzhou Jiangsu 215300,China)
出处
《硬质合金》
2025年第5期25-34,共10页
Cemented Carbides
基金
国家自然科学基金(52205482)
山东省自然科学基金(ZR202QE011)
国家自然科学基金重大研究计划(92360311)
吉林大学数控装备可靠性教育部重点实验室开放基金(JLU-cncr-202409)。
关键词
麻花钻
砂轮
螺旋槽
圆弧半径
twist drill
grinding wheel
spiral flute
arc radius
