钢深孔枪钻切削试验与切屑形态分析
2020-03-11
作者：张小粉1，张宪坤2，白瑀2
单位：1咸阳职业技术学院机电(技师)学院；2西安工业大学
摘要：切屑形态对枪钻深孔加工中孔成型精度影响极大，钻尖切屑易堵塞在V型排屑槽中或缠绕在钻头上，合理的断屑和排屑是保证加工顺利进行的前提。选用硬质合金枪钻对45钢进行深孔加工试验，采用单因素试验法研究切削速度和进给量对切屑形态的影响规律。试验表明：切削速度较低时，主要为带状切屑；切削速度较高时，主要为单元切屑；当切削速度保持不变时，随着进给量的增大，切屑的主要形状从长带状向单元切屑逐渐转变；当进给量保持不变时，随着切削速度的增大，切屑尺寸从大变小再变大。
关键词：深孔加工；枪钻；切屑形态；单因素
中图分类号：TG713；TH161.3文献标志码：ADOI：10.3969/j.issn.1000-7008.2020.02.010
Cutting Experiment and Chip Morphology Analysis of 45 Steel Gun Drill
with Deep Hole
Zhang Xiaofen，Zhang Xiankun，Bai Yu
Abstract:The chip shape has a great influence on the forming accuracy of the deep hole during the gun drilling.The chip generated by the drill tip is easy to block in the Vshaped chip discharge groove or wound on the drill bit.Reasonable chip breaking and chip removal are the premise to ensure the smooth processing.This article of the 45 steel by carbide gun drill deep hole processing experiment，using the single factor experimental method to study the effect of cutting speed and feed on chip morphology，observation found that cutting speed is low，mainly for the continuous chip，cutting speed is high，mainly for the unit chip，when the cutting speed remains the same，with the increase of feed，the main chip shape from a long strip chip gradually shift to the unit.When the feed rate remains the same，with the increase of the cutting speed，the chip size is from large to small and then back to large.
Keywords:deep hole processing；gun drill；chip morphology；single factor