导向套对孔直线度影响的试验研究

在枪钻加工深孔过程中,技术人员往往把提高钻削质量的焦点集中在改变钻头几何参数和调整切削用量等问题上而忽略了导向套的作用。导向套在外排屑加工中顶紧工件既起导向作用又有防止高压冷却液泄漏的功能。尤其在钻削长径比较大的深孔时,导向套的制造材料和内径公差对孔的直线度影响极大。国内某工厂正在使用的枪钻钻削冷却孔,加工过程中主要存在着直线度不能达到要求的问题,严重影响了生产进度。本文通过对现场加工状况的详细分析对导向套的部分参数进行改进,使钻孔直线度偏差大幅下降。

Guide Sleeve to Hole of Straightness Influence

In daily,drill deep hole with gun drill,production technical personnel tend to focus on changing in drill geometry and adjusting processing parameters to improve machining quality and so on.But they often ignore the function of guide sleeve.It either guide role or prevent high pressure cooling fluid leakage role with top tight workpiece in the discharge of chipless progress.Especially,the guide sleeve of manufacturing materials and inner tolerance have great influence in straightness of hole when drill hole diameter of smaller,.A domestic factory is using whole alloy gun to drill cooling hole,the major problem is processed hole cannot meet the requirements of the straightness and have impacted on the production seriously.In this article,we analyze the process and then improve the tool parameters.Making the drilling straightness error drop significantly.