可转位浅孔钻螺旋容屑槽结构优化及实验研究  

Optimization and experimental research of the chip flute structure for indexable insert drill

作　　者：连云崧 张敏[1,2] 陈小辉 彭庶文[3] 林亮亮 刘超 褚旭阳 周伟 LIAN Yunsong;ZHANG Min;CHEN Xiaohui;PENG Shuwen;LIN Liangliang;LIU Chao;CHU Xuyang;ZHOU Wei(Pen-Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University,Xiamen 361105,China;Department of Mechanical and Electrical Engineering,Xiamen University,Xiamen 361102,China;Xiamen Golden Egret Special Alloy Co.,Ltd.,Xiamen 361021,China;Xiamen Tungsten Co.,Ltd.,Xiamen 361126,China)

机构地区：[1]厦门大学萨本栋微米纳米科学技术研究院,厦门361105 [2]厦门大学机电工程系,厦门361102 [3]厦门金鹭特种合金有限公司,厦门361021 [4]厦门钨业股份有限公司,厦门361126

出　　处：《现代制造工程》2024年第11期10-17,共8页Modern Manufacturing Engineering

基　　金：厦门市自然科学基金项目(3502Z202373010);厦门市重大科技计划项目(3502Z20231009);国家自然科学基金项目(51975496);中央高校基本科研基金项目(20720200068);湖南创新型省份建设专项项目(2020GK2083);国家重点研发计划项目(2019YFB1704800);江苏省精密与微制造技术重点实验室项目。

摘　　要：钻头排屑性能直接影响切削性能,为了解决可转位浅孔钻在切削过程中出现的缠屑和振动问题,进而避免由此引发的加工异常和孔壁质量差的情况,采用了理论分析和仿真模拟相结合的方法,深入研究了螺旋容屑槽横截面形状结构和螺旋角结构对钻体刚性的影响,并通过实验验证了所设计钻体具有良好的刚性和排屑性能。仿真模拟结果分析表明,在芯径一致时钻体受到的最大应力为761 MPa、应变为0.003367,钻体头部横向位移量为0.3971 mm、转动变化量为0.006500 rad;变螺旋角在20°-16°时,钻体受到的最大应力为695 MPa、应变为0.002688,钻体头部横向位移量为0.3641 mm、转动变化量为0.006140 rad,此时钻体刚性和排屑性能达到良好的平衡;分析表明,螺旋角越大、叶宽差值越大,则芯径越小,钻体刚性越差;所设计的钻体在实验工况下未发生缠屑情况,表现出更好的排屑性能,并有较高的孔径一致性和良好的孔壁质量。The chip evacuation performance of the drill directly affects the cutting performance.In order to address the issues of chip entanglement and vibrations encountered during the cutting process of indexable insert drills,and to prevent resulting processing abnormalities and poor hole wall quality,a combination of theoretical analysis and simulation was utilized to conduct an in-depth study on the impact of the cross-sectional shape and helix angle structure of the chips flute on the drill body rigidity.Experimental validation was conducted to demonstrate the excellent rigidity and chip evacuation performance of the designed drill.Simulation experimental results analysis showed that when the core diameter is consistent,the maximum stress on the drill body is 761 MPa,the strain is 0.003367,the drill body head lateral displacement is 0.3971 mm,and the rotation change is 0.006500 rad;when the variable helix angle is between 20°-16°,the maximum stress on the drill body is 695 MPa,the strain is 0.002688,the drill body head lateral displacement is 0.3641 mm,and the rotation change is 0.006140 rad,achieving a good balance between drill body rigidity and chip evacuation performance.The analysis indicates that as the helix angle increases,the difference in leaf width increases,and the core diameter decreases,the drill body rigidity becomes poorer.The designed drill demonstrated better chip evacuation performance without chip entanglement under experimental conditions,and exhibited high hole diameter consistency and good hole wall quality.

关 键 词：可转位浅孔钻 螺旋容屑槽 刚性 截面形状 螺旋角 

分 类 号：TG52[金属学及工艺—金属切削加工及机床]