Power transmission device of a press machine
AssigneeKabushiki Kaisha Komatsu Seisakusho
InventorKazuo Kubo
Life of this patent
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Abstract
In a press machine provided with a power transmission device (1) for transmitting the driving force of the press body to a transfer feeder device, on the occasion of the recoupling of the power transmission device (1) at the exchange of a mold or the like, a motor (8) for rotating the shaft of the power transmission device (1) is driven in the forward or reverse direction so that the feeder angle (F) coincides with the crank angle (P) of the press. At the moment when the difference (P-F) between said angles enters within a predetermined range (A), the power transmission device (1) is coupled. Thus, it is possible to automatically couple the power transmission device simply and with high accuracy.
Claims16
A power transmission device of a press machine comprising:
- a power transmission mechanism for coupling a press-side output shaft connected to a press body-side driving source and a power-delivering shaft connected to a feeder device, and transmitting the power of the press body-side driving source to the feeder device via said press-side output shaft and power-delivering shaft;
- a motor for transmitting power to said power-delivering shaft through a course which is different from said power transmission mechanism, and driving the feeder device independently of the press body-side driving source;
- interrupting means for interrupting the power transmission by said power transmission mechanism;
- first detection means for detecting the rotating position of said press-side output shaft;
- second detection means for detecting the rotating position of said power-delivering shaft;
- and
- control means for receiving detected values of said first and second detection means when an instruction for coupling said power transmission mechanism is received from a switch, and rotating said power-delivering shaft in the forward or reverse direction by driving said motor so that a difference between said detected values enters within a predetermined range, and coupling said power-delivering shaft to the press-side output shaft by driving said interrupting means when said difference enters within said range.
A power transmission device of a press machine comprising:
- a power transmission mechanism for coupling a press-side output shaft connected to a press body-side driving source and a power-delivering shaft connected to a feeder device, and transmitting the power of the press body-side driving source to the feeder device via said press-side output shaft and power-delivering shaft;
- a motor for transmitting the power to said power-delivering shaft through a course which is different from said power transmission mechanism, and driving the feeder device independently of the press body-side driving source;
- interrupting means for interrupting the power transmission by said power transmission mechanism;
- first detection means for detecting the rotating position of said press-side output shaft;
- second detection means for detecting the rotating position of said power-delivering shaft;
- and
- control means for receiving under the situation that three set values having a relationship relative a difference between the detected values of said first and second detection means, a first set value <
- a second set value >
- a third set value, having previously been set, the detected values of said first and second detection means when an instruction for coupling said power transmission mechanism is received from a switch rotating said power-delivering shaft in the forward or reverse direction by driving said motor until a difference between said detected values is out of the range of said third set value, subsequently rotating said power-delivering shaft in the forward or reverse direction by driving said motor until said difference is within the range of said second set value, halting said motor at the moment when said difference comes within the range of said second set value, and, when said difference comes within the range of said first set value, coupling said power-delivering shaft to the press-side output shaft by driving said interrupting means.
Dependencies are inferred from the claim text.