摘要
为了解决金属-复合材料双层结构的小孔高精度加工问题,针对某航天型号防热部段传感器孔,提出一种基于三轴机床的复合材料空间法向小孔数控加工方法。此类法向小孔的精密加工通过“两步法”实现:首先使用芯轴将该法向内层金属上已钻孔到位的小孔从壳体内层精确引出至外层无干涉区域,然后利用三轴机床+二轴手动转台精确找正加工基准后加工复合材料小孔。结果表明,该方法提高了传感器孔的加工精度,改善了加工效率,降低了生产成本,其加工原理已成功应用于其他法向特征孔的加工工艺中,对空间法向小孔的三轴加工工艺具有指导性意义。
In order to solve the problem of high precision machining of small hole with metal-composite bilayer structure,a NC machining method of composite material spatial normal hole based on three axis machine tool was proposed in respect of the sensor hole machining of a certain type of aerospace thermal protection section.The precise processing of such a small hole was realized by two steps:firstly,the small datum hole which had been drilled on the inner metal was leaded to the outer layer on the non-interference region from the inner layer of the shell by using a mandrel,and then the machining benchmark was accurately located through the three axis machine+two axis manual turntable for machining composite hole.It releases that the machining accuracy of the sensor hole was improved,the machining efficiency was increased and the production cost was reduced by this method.The machining principle has been successfully applied to other normal characteristic holes processing,which has a guiding role in the three-axis machining process of normal characteristic holes.
作者
方春平
赵建设
凌丽
Fang Chunping;Zhao Jianshe;Ling Li(Aerospace Research Institute of Material&Processing Technology,Beijing 100076)
出处
《航天制造技术》
2023年第1期7-10,共4页
Aerospace Manufacturing Technology
关键词
三轴机床
复合材料
法向小孔
数控加工
three axis machine tool
composite material
spatial normal hole
NC machining
