摘要
在深孔钻削过程中,因空心车轴材料硬度高、钻杆长而刚性差、深孔排屑困难导致钻头在钻孔过程中钻杆自身的抗剪切力不足以克服钻头切削阻力而发生钻头空转和钻杆疲劳断裂,整个钻削过程不仅耗时长、钻孔表面质量差。因此开展空心车轴深孔钻削研究,目的是要实现枪钻平稳切削、提高深孔排屑效果、获得良好的钻孔表面质量、提高钻孔效率以及降低钻杆断裂概率。结合深孔加工枪钻的特点,采用2~3根不同长度的枪钻进行阶梯钻孔和变参数切削循环钻削相结合的方法进行空心车轴工艺试验。试验表明:采用阶梯钻孔和变参数切削循环钻孔加工方法能让切削过程更加平稳、改善铁屑排出效果,提高空心车轴加工效率和车轴内孔表面质量,降低钻头断裂概率。
In the process of hollow axle drilling,due to the high hardness of the axle material,poor rigidity of the long drill pipe,and the difficulty of chip evacuation in deep holes,the shear resistance of the drill pipe is not enough to overcome the drill cutting resistance,which induces drill bit idling and drill pipe fatigue fracture,the drilling process not only is time-consuming,but also has poor surface quality.Therefore the research purpose of the hollow axles deep hole drilling achieves gun drill smooth cutting,improves chip evacuation effect in deep holes,obtains good drilled hole surface quality,improves the drilling efficiency and reduced the drill breakage probability.Combined with gun drill drilling char‐acteristics in deep hole processing,the hollow axle process test adopts step drilling with 2~3 different lengths gun drills and the variable parameter cutting cycle drilling method.The test results show that the method of the step drilling and the variable parameter cutting cycle drilling,can make the cutting process more stable,improve chip evacuation effect,improve the hollow axle drilling efficiency and the surface quality of the the axle inner hole,reduce the drill breakage probability。
作者
汤志钧
谢莹莹
刘宜成
Tang Zhijun;Xie Yingying;Liu Yicheng(CRRC Nan⁃jing Puzhen Co.,Ltd.,Nanjing 210031,China;不详)
出处
《工具技术》
北大核心
2025年第7期103-107,共5页
Tool Engineering
关键词
空心车轴钻削
深孔钻削
枪钻钻削
变参数循环钻孔
阶梯钻削
hollow axle drilling
deep hole drilling
gun drill drilling
variable parameter cyclic drilling
step drilling
作者简介
第一作者:汤志钧,高级工程师,中车南京浦镇车辆有限公司,210031南京市。
