| 摘要 |
PURPOSE:To form a highly accurate and low cost ferrule for a high performance photoconnector by drawing a ferrule having a core wire inserted in the hole. CONSTITUTION:A rigid core wire 10 having diameter nearly equal to that of an optical fiber is inserted in the small hole 21 of a ferrule 20, and the cylindrical part 26 is held by the chuck of a lathe etc. A pair of drawing tools 30a, 30b are fixed with semi-circular inner diameter of the drawing holes 31a, 31b brought into close contact with outer periphery of finished diameter 24 of the ferrule 20. After giving lubricating oil to the outer diameter part 23 of the ferrule 20, the ferrule is rotated around its center axis. At the same time, drawing tools 30a, 30b are moved in the direction of B until drawing holes 31a, 31b come out from an end of the ferrule 20, and the outer diameter part 23 of the ferrule 20 is drawn to cylindrical shape which has equal diameter with finished diameter part of drawing and coaxial with the small hole 21. At this time, inner diameter of the small hole 21 is reduced until its inner peripheral face comes into close contact with outer peripheral face of the core wire 10. When the core wire 10 is pulled out, a ferrule having a small hole 27 that fits accurately to the optical fiber is formed. |
