| 摘要 |
PURPOSE:To improve the accuracy in feeding a working material and to maintain the high utilizing efficiency of the material by providing a main driving roll and a driven roll for grasping the working material in a pair, and driving the main driving roll associatedly with the rotating angle of a crank shaft for press working. CONSTITUTION:A driving shaft 27 ratates upon rotation of a crank shaft and on the other hand, a driven shaft 29 is so arranged by the linkage of the shaft 27 and the driven shaft that the driven shaft rotates in the period when the crank shaft is at a rotating angle of 270-360 deg.. Therefor a detecting circuit 36 for the start of rotation detects the rotation of the shaft 29 at the point of the time when the crank shaft attains the turning angle of 270 deg., then said circuit applies a signal output to a servocontrol motor 18. The motor 18, which is kept to withhold the execution of the command from a numerical control circuit 26, is realsed of said condition and starts running. The driving power of said motor is transmitted via gears 21, 17, 15 and gear 12 of a reduction gear mechanism to a main driving roll 2. The roll 2 is then rotated by as much as the rotating amt. required for feeding a working material M, by which the material M is fed. |
