内窥镜中透镜的准球心加工工艺改进
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摘要
为了改进内窥镜中透镜的生产工艺,采用三片不胶盘夹具代替传统的刚性盘和弹性盘对透镜的大面进行精磨和抛光,缩短了工艺流程;运用直压治具解决了因零件边缘过薄、夹具夹持难度大的问题;通过对传统工艺流程的调整,避免了因机械定心磨边产生的压痕及划痕对抛光表面质量的影响;采用电木代替聚氨酯抛光皮对小面进行抛光,提高了光圈的稳定性。测试结果表明,三片不胶盘加工的成品率为94%,相对较低,如何进一步提高三片加工的成品率成为提高总体成品率的关键。
In order to improve the manufacture technology of lens with small aperture in endoscope,the technological processes were shortened by designing the nonblocking fixture for three lens instead of rigid disk and elastic disk. The problem that the thin lens were difficult to clamp was solved by using new fixture. The impact of mechanical centering and edging on the surface of lens was avoided by adjusting the traditional technological process. The stability of interferometric fringe in polishing process was advanced by adopting phenolic resin instead of polyurethane. Test results show that the ratio of qualified products can only reach to 94% by using the nonblocking fixture,it is the key point to increase the the qualified rate of fine grinding and polishing process using the nonblocking fixture for three lens.
In order to improve the manufacture technology of lens with small aperture in endoscope,the technological processes were shortened by designing the nonblocking fixture for three lens instead of rigid disk and elastic disk. The problem that the thin lens were difficult to clamp was solved by using new fixture. The impact of mechanical centering and edging on the surface of lens was avoided by adjusting the traditional technological process. The stability of interferometric fringe in polishing process was advanced by adopting phenolic resin instead of polyurethane. Test results show that the ratio of qualified products can only reach to 94% by using the nonblocking fixture,it is the key point to increase the the qualified rate of fine grinding and polishing process using the nonblocking fixture for three lens.
引文
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5李萍,石磊,李晓燕,等,酚醛摩擦材料研究进展.工程塑料应用,2016;44(9):145-147Li Ping,Shi Lei,Li Xiaoyan,et al.Research progress of phenolic friction materials.Engineering Plastics Application,2016;44(9):145-147
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2贾晓航,颜青来,文燕.医用硬性内窥镜畸变的评定基础和方法.光学学报,2006;26(8):1227-1229Jia Xiaohang,Yan Qinglai,Wen Yan.Evaluation base and method o medical rigid endoscope distortion.Acta Optical Sinica,2006;26(8):1227-1229
3曹天宁.我国光学加工的几个热点:小,大,硬,精.激光与光电子学进展,2009;32(7):58-59Cao Tianning.A few hot spots of optical processing in our country:small,large,hardness and precision.Laser and Optoelectronics Progress,2009;32(7):58-59
4于建,王书武,黄国锋,等.丁腈橡胶对聚甲醛树脂的增韧机理研究.高分子学报,2000;1(1):90-91Yu Jian,Wang Shuwu,Hang Guofeng,et al.Studyon the toughening mechanism of POM/NBR blends.Acta Polymerica Sinica,2000;1(1):90-91
5李萍,石磊,李晓燕,等,酚醛摩擦材料研究进展.工程塑料应用,2016;44(9):145-147Li Ping,Shi Lei,Li Xiaoyan,et al.Research progress of phenolic friction materials.Engineering Plastics Application,2016;44(9):145-147
6蔡立,耿素杰,付秀华.光学零件加工技术.北京:兵器工业出版社,2006Cai Li,Geng Sujie,Fu Xiuhua.The manufacturing technology of optica elements.Beijing:The Publishing House of Ordnance Industry.2006