摘要
在枪管、飞机叶片、弹体壳腔等的微细裂纹无损检测试验研究中,需要先在这些场合预制微细人工伤。为解决这类微细人工伤的单件或者小批量加工问题,需要研究一种加工环境质量要求相对较低、热效应及残余应力相对较小的新型加工方法。本文提出一种应对加工需求的新方法,即以普通的电火花加工原理为基本雏形,利用微细脉冲产生的电弧放电热,逐步将金属微量熔蚀,在加工间隙中,使油液及时将切屑冲走,以实现顺利加工。通过样机开发与实际加工效果分析可知,工件切口面满足要求,样机工作可靠,实现了小型化与便携功能,能够解决微细有槽孔结构的单件或者小批量快速加工问题,为金属材料的微裂纹蚀刻设备的微型化与无损检测技术奠定了基础。
In the study of micro crack nondestructive testing on barrel, plane blades, projectile shell and so on, micro artificial cracks should be machined at these places. To machine some micro holes and slots on high hardness material such as barrel inner wall, aircraft engine blade and projectile shell, a new technique with less influence of thermal and low residual stress was proposed. Took the ordinary EDM principle as the basic rudiment, the material was melted little by little because of the heat generated by electric spark, and was washed away by the oil in the machining gap. Through the prototype development and actual machining experiment, micro hole and slot with good incisions were machined. The prototype worked reliably, miniaturization and portability, single or small batch micro blind slot can be machined rapidly, which also provides foundation for miniaturization of micro hole and slot etching equipment and NDT technology.
出处
《新技术新工艺》
2013年第6期8-11,共4页
New Technology & New Process
