Metal deforming – By plural tool-couples – With means to feed work between plural tool stations
Patent
1995-08-24
1997-07-22
Crane, Daniel C.
Metal deforming
By plural tool-couples
With means to feed work between plural tool stations
7240511, 1986211, B21D 4305
Patent
active
056494432
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/JP94/00412 filed Mar. 15, 1994.
TECHNICAL FIELD
The present invention relates to a transfer feeder that employs a suction-type conveying system.
BACKGROUND ART
In the traditional art, it is known that a transfer press has been provided with a transfer feeder for carrying a workpiece into and out of a press system, or for sequentially conveying workpieces into successive working stations.
Conventionally, the transfer feeder for conveying the workpieces has been provided with a pair of transfer bars which are operable to move in two-dimensional or three-dimensional directions, the transfer feeder having been so constructed as to be driven by a cam rotated by the power that is taken out from the press system.
In the conventional transfer feeder employing the cam-drive system, however, the movement of the transfer bars is eventually determined by a profile of the cam. Accordingly, a problem has then arisen such that the movement pattern is not readily variable in accordance with the workpieces which are being conveyed. On the other hand, if the movement patterns of the transfer bars are made variable, a plurality of cams have been required in accordance with the movement patterns which are to be altered from one to another. This requirement has made the drive mechanism unduly complex and the entire system prohibitively expensive, and has involved various inconveniences including, among others, the restriction imposed on the number or the movement patterns that can variably be chosen by selecting the number of cams.
SUMMARY OF THE INVENTION
With the foregoing points taken into account and in order to eliminate such conventional disadvantages, a first object of the present invention is to provide a transfer feeder by which a desired movement pattern is made readily obtainable in accordance with a workpiece that is being conveyed, and which is yet of a simplified construction.
Accordingly, in order to achieve the above-mentioned first object, there is provided, in accordance with a first embodiment of the present invention, a transfer feeder which comprises: other and extending in a workpiece conveying direction; upward and downward directions; said pair of the lifting beams as to be displaceable in the said workpiece conveying direction; bar carriers as afore-said which are opposite to each other, and that has a workpiece attracting means attached thereto; and direction, the said transfer feeder being characterized in that: is constituted by a servo-motor.
According to this construction with the drive source of at least the lifting mechanism being constituted by a servo-motor, such cross bars as mentioned above can be displaced to provide a desired movement pattern thereof. Accordingly, a variety of movement patterns of the cross bars are made readily obtainable as desired. Furthermore, since an individual cam is not required for each individual movement pattern to be established, it follows that a drastic simplification of the drive mechanism is hereby achieved.
The feed mechanism may have its drive source which is constituted by the power that is taken out from the press system. In this instance, because the feed in the feed direction is mechanically interlocked with the press system, it is apparent that there is no fear that due to an instantaneous stop, a forming operation may be performed with any cross bar closed up in a die. Consequently, the cross bars and the dies should be prevented, without fail, from being damaged.
Also, the feed mechanism may have its drive source which is constituted by a servo-motor. In this instance, since the vibrations of the cross bars that may be generated in the conveyance of a workpiece is reduced as compared with the conventional cam-drive system, it is noted that any feed failure and noise can be prevented.
It should also be noted that a transfer feeder according to the present invention may be provide for a modular type transfer press in which each of multiple press units is independently provided for each of multiple, successive
REFERENCES:
patent: 4540087 (1985-09-01), Mizumoto
patent: 4807456 (1989-02-01), Shiraishi
patent: 4995505 (1991-02-01), Takahashi
patent: 5148697 (1992-09-01), Shiraishi
patent: 5269168 (1993-12-01), Ogawa
patent: 5385040 (1995-01-01), Michael
Baba Kiyokazu
Nishida Kenji
Shiroza Kazuhiko
Crane Daniel C.
Kabushiki Kaisha Komatsu Seisakusho
LandOfFree
Transfer feeder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transfer feeder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transfer feeder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1554057