瓜瓣模上定位销孔的改进加工工艺  

Improved Processing Technology of Positioning Pin Hole on Melon Mold

作　　者：张大勇 赵文利 尉晓霞 刘继军 孙勇跃 ZHANG Dayong;ZHAO Wenli;WEI Xiaoxia;LIU Jijun;SUN Yongyue(Capital Aerospace Machinery Co.,Ltd,Beijing 100076)

机构地区：[1]首都航天机械有限公司,北京100076

出　　处：《宇航材料工艺》2021年第1期94-98,共5页Aerospace Materials & Technology

摘　　要：针对瓜瓣阳模上定位销孔加工的找正误差大、实物与数模不一致、加工成本高的难题,通过改进找正方法,粗、精找正结合,并利用3D寻边器进行程序验证的思路,实现了理论数模和实物的精确对齐、找正。在此基础上通过椭球参数方程的坐标转换,实现了在3轴机床上对椭球面上法向和轴向定位销孔的加工。结果表明,采用改进后的加工方法,孔的位置精度达到φ0.1mm,加工成本降低75%,可在工程应用中加以推广。To solve the problems such as big alignment deviation,inconsistency between the entity and the digital model and high processing cost in the processing of the positioning pin hole on the melon petal male mold,the alignment method was improved.By combining coarse alignment and fine alignment,as well as using the 3D edge finder to perform the program verification,the goal of accurate alignment between the theoretical digital model and the entity was achieved.On this basis,through the coordinate transformation of the ellipsoid parameter equation,the processing of the normal and axial positioning pin holes on the ellipsoid surface on the 3-axis machine tool is accomplished.Consequently,with the help of the improved processing method,the hole position accuracy reachesφ0.1 mm and the processing cost is reduced by 75%.This improved method should be promoted and utilized in engineering applications.

关 键 词：定位销孔 找正误差 对齐 坐标转换 

分 类 号：V461[航空宇航科学与技术—航空宇航制造工程]