| 摘要 |
PURPOSE:To prevent the formation of corrugated clearances among coil inner- circumferential side winding layers, and to improve insulating properties by winding a conductor under the state in which the diameter of a spool is reduced on winding- start, expanding the diameter of the spool so as to be made the same as the inner diameter of a finally required coil and winding the coil. CONSTITUTION:The diameter of a spool 18 is reduced previously, estimating the quantity of floating from the outer circumference of the spool 18 of a conductor 21 at the time of winding-start. The tip of the conductor 21 is connected into a connecting groove 22 in the spool 18, and the spool 18 is turned through a drive shaft 13 by a motor 12, applying tension T to the conductor 21, thus lap-winding the conductor 21. When the number of turns of the conductor 21 reaches a fixed number during winding, the diameter of the spool 18 is increased. The positions of both frame bodies 19 are detected by a position transducer 36 at that time, and the motor 12 is stopped when the diameter of the spool 18 is expanded up to the same size W1 as the finally required inner diameter of a coil 40. Accordingly, clearances S among the inner circumference of the coil 40 and the rectilinear sections of the outer circumferences of each frame body 19 are removed, thus fast sticking the coil 40 and the frame bodies. The spool 18 is rotated again, and the conductor 21 is wound up to the aimed number of winding. |
