GH4169深孔结构的BTA扩孔钻钻削试验与仿真研究  

Drilling experimental and simulation study on BTA reamer for CH4169 deep hole structure

作　　者：易林峰 常国政 万坤 梁志强[2] 郭琳 叶慰 张瑞 YI Linfeng;CHANG Guozheng;WAN Kun;LIANG Zhiqiang;GUO Lin;YE Wei;ZHANG Rui(Aecc South Industry Company Limited,Zhuzhou 412002,China;School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]中国航发南方工业有限公司,湖南株洲412002 [2]北京理工大学机械与车辆学院,北京100081

出　　处：《兵器材料科学与工程》2023年第5期119-125,共7页Ordnance Material Science and Engineering

摘　　要：为解决镍基高温合金GH4169深孔结构扩孔加工时刀具磨损严重、切削负载大、钻削温度等问题,开展深孔钻削试验和钻削仿真研究,研究扩孔钻刀片的磨损机理及刀片前角、后角和刀尖圆弧半径对钻削力和钻削温度的影响规律。结果表明:深孔钻削GH4169时BTA单齿扩孔钻刀具表现为前刀面磨粒磨损和涂层脱落,后刀面磨损量小且沟痕较轻微,主切削刃存在明显边界磨损,圆弧刃发生刃口破损失效。在所研究范围内,轴向力和扭矩改变对趋势影响不大,但稳定钻削时波动幅度会随前角的减小或后角的增加而减小,刀尖圆弧半径接近进给量时波动幅度最小。刀尖处最高温度均随前角、后角和刀尖圆弧半径的增加而升高,后角对温度的影响最明显;刀尖圆弧半径对温度场分布的影响最大,随其增加会使刀尖温度较高温度区域扩大,加快热量传递速率。前角在0°~2°、后角在10°~12°内增加,刀尖圆弧半径为0.5 mm时,刀具稳定钻削时波动幅度较小,有利于降低钻削力和钻削温度,提高刃口强度。In order to solve the problems of severe tool wear,high cutting load,and drilling temperature during reaming the deep hole structure of nickel base superalloy GH4169,deep hole drilling experiments and drilling simulation studies were conducted to obtain the wear mechanism of the reamer blade and the influences of the rake angle,flake angle and the radius of tool tip arc radius on the drilling force and drilling temperature.The results show that during drilling GH4169 deep holes,the BTA single tooth reamer drill tool exhibits abrasive wear and coating detachment on the rake face,while the tool wear on the flake face and the groove marks are slight.There is obvious boundary wear on the main cutting edge and breakage of arc edge.Within the scope of study,changes in axial force and torque have little effect on the trend of variation,but during stable drilling,the fluctuation amplitude decreases with decrease of rake angle or increase of flake angle.The fluctuation amplitude is the smallest when the tool tip arc radius is close to the feed rate.The highest temperature at the tool tip increases with the increase of rake angle and flake angle,as well as the radius of the tool tip arc.The influence of flake angle is the most significant.The radius of the tool tip arc has the greatest impact on the temperature field distribution,and as it increases,it expands the high⁃temperature area of the tool tip and accelerates the heat transfer rate.When the rake angle increases within 0°⁃2°and the flake angle increases within 10°⁃12°,and the radius of the tool tip arc is 0.5 mm,the fluctuation amplitude of the axial force and torque during stable drilling is relatively small,which is beneficial for reducing drilling force and drilling temperature,and improving the edge strength.

关 键 词：BTA扩孔钻 刀具磨损 钻削仿真 刀片结构 钻削力 钻削温度 

分 类 号：TG713.2[金属学及工艺—刀具与模具]