错齿BTA深孔钻削切屑变形断裂影响因素研究
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摘要
利用错齿BTA深孔钻削切屑弯曲变形规律,对导致错齿BTA内排屑深孔钻切屑断裂的影响因素进行了分析,通过试验研究了错齿BTA深孔钻削切屑的变形断裂随刀齿钻削半径、钻削工艺参数、断屑台尺寸的变化规律。研究结果表明,刀齿钻削半径对切屑厚度影响很大,随钻削半径的增大,各刀齿切屑厚度增大,切屑厚度最大值点均位于刀齿切屑大径边缘且中心齿、中间齿、外齿的切屑厚度最大值依次减小;与转速相比,进给量对切屑厚度和切屑应变增量的影响更大,随进给量增大,切屑厚度增大,切屑应变增量增大;随断屑台宽度减小、高度增大,切屑应变增量增大,断屑条件改善。
The influence factors on chip breaking were analyzed by using the chip bending deformation rules of staggered teeth BTA deep hole drilling. The varation rules of deformations and breaking along with drilling radius,drilling process parameters and chip breaker dimension parameters were studied. The results show that the drilling radius has a great influence on the chip thickness. With the drilling radius increasing,the chip thickness increases.The maximum chip thickness is located on the teeth periphery,and the external tooth chip thickness is the smallest. Compared with drilling speed,drilling feed has a greater impact on the chip deformation and breaking. With the increases of the feed,chip thickness increases,chip strain increases. As the chip-breaker width decreases and the height increases,the chip strain increases and the chip breaking conditions improve.
The influence factors on chip breaking were analyzed by using the chip bending deformation rules of staggered teeth BTA deep hole drilling. The varation rules of deformations and breaking along with drilling radius,drilling process parameters and chip breaker dimension parameters were studied. The results show that the drilling radius has a great influence on the chip thickness. With the drilling radius increasing,the chip thickness increases.The maximum chip thickness is located on the teeth periphery,and the external tooth chip thickness is the smallest. Compared with drilling speed,drilling feed has a greater impact on the chip deformation and breaking. With the increases of the feed,chip thickness increases,chip strain increases. As the chip-breaker width decreases and the height increases,the chip strain increases and the chip breaking conditions improve.
引文
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[2]孔令飞,牛晗,侯晓丽,等.错齿内排屑刀具深孔加工中的刀具振动特性对孔圆度形貌的作用机制[J].兵工学报,2016,37(6):1066-1074.KONG Lingfei,NIU Han,HOU Xiaoli,et al.Influence of Tool Vibration Characteristics on the Hole Roundness Morphology in BTA Deep-hole Drilling[J].Acta Armamentarii,2016,37(6):1066-1074.
[3]ZHANG H,SHEN X Q,BO A,et al.A Multiscale Evaluation of the Surface Integrity in Boring Trepanning Association Deep Hole Drilling[J].International Journal of Machine Tools and Manufacture,2017,123:48-56.
[4]THIL J,HADDAG B,NNOUARI M,et al.Experimental and Analytical Analyses of the Cutting Process in the Deep Hole Drilling with BTA(Boring Trepanning Association)System[J].Mechanics&Industry,2014,14(6):413-429.
[5]王培河.AP1000蒸汽发生器制造难点分析[J].中国核电,2011,4(1):52-59.WANG Peihe.Manufacturing Difficulties Analysis of AP1000 Steam Generator[J].China Nuclear Power,2011,4(1):52-59.
[6]庞俊忠,潘杰,常豆豆,等.旋转DF系统的多结构参数建模及结构设计[J].中国机械工程,2016,27(13):1721-1725.PENG Junzhong,PAN Jie,CHANG Doudou,et al.Multi-structural Parameter Modeling and Structure Design of a Rotating DF System[J].China Mechanical Engineering,2016,27(13):1721-1725.
[7]BIERMANN D,KIRSCHNER M.Experimental Investigations on Single-lip Deep Hole Drilling of Superalloy Inconel 718 with Small Diameters[J].Journal of Manufacturing Processes,2015,20(1):332-339.
[8]GAO C H,CHENG K.The Investigationon the Machining Process of BTA Deep-hole Drilling[J].Journal of Materials Processing Technology,2001,1905107(1):222-227.
[9]SAHU S K,DEVOR R E,KAPOOR S G.Modeling of Forces for Drills with Chip-Breaking Grooves[J].Journal of Manufacturing Science and Engineering,2004,126:555-564.
[10]吴明阳,赵旭,陈勇,等.高压冷却下PCBN刀具切削高温合金切屑卷曲折断机理及试验研究[J].机械工程学报,2017,53(9):187-192.WU Mingyang,ZHAO Xu,CHEN Yong,et al.Reaserch on Mechanism and Experimental of Chip Breaking during High Pressure Cooling Turning of Superalloys with PCBN Tool[J].Journal of Mechanical Engineering,2017,53(9):187-192.
[11]TNAY G L,WAN S,WOON K S,et al.The Effects of Dub-off Angle on Chip Evacuation in Single-lip Deep Hole Gun Drilling[J].International Journal of Machine Tools&Manufacture,2016,108:66-73.
[12]杨翔,郑建明,李旭波,等.错齿BTA钻头刀体扭转强度模拟分析与试验研究[J].机械科学与技术,2017,36(3):391-396.YANG Xiang,ZHENG Jianming,LI Xubo,et al.Simulation and Experimental Study on Torsion Strength of Staggered BTA Drill Body[J].Mechanical Science and Technology for Aerospace Engineering,2017,36(3):391-396.
[13]ZHANG Y Z.Chip Curl,Chip Breaking and Chip Control of the Difficult-to-Cut Materials[J].Annals of the CIRP,1980,29(1):79-83.
[14]TOROPOV A,KO S L.Prediction of Tool-chip Contact Length Using a New Slip-line Solution for Orthogonal Cutting[J].International Journal of Machine Tools&Manufacture,2003,43:1209-1215.
[15]KE F,NI J,STEPHENSON D A.Chip Thickening in Deep-hole Drilling[J].International Journal of Machine Tools and Manufacture,2006(46):1500-1507.
[16]BUCHKREMER S,KLOCKE F,LUNG D.Analytical Study on the Relationship between Chip Geometry and Equivalent Strain Distribution on the Free Surface of Chips in Metal Cutting[J].International Journal of Mechanical Sciences,2014(85):88-103.
[17]孔金星,邓飞,夏志辉,等.纯铁切屑形成特征及影响因素研究[J].华南理工大学学报(自然科学版),2016,44(12):7-13.KONG Jinxing,DENG Fei,XIA Zhihui,et al.Investigation into Formation Characteristics and Influence Factors of Pure Iron Chip[J].Journal of South China University of Technology(Natural Science Edition),2016,44(12):7-13.