Parts transfer system having three orthogonal movement axes wher

Details Parts transfer system having three orthogonal movement axes wher Parts transfer system having three orthogonal movement axes wher

1988-09-08

1989-10-24

Crane, Daniel C.

Metal deforming

By plural tool-couples

With means to feed work between plural tool stations

72421, 198621, 414750, B21J 1308

Patent

active

048759317

DESCRIPTION:

BRIEF SUMMARY
This invention relates to a part transfer mechanism which uses grippers and the gripper closing and opening motion or first axis movement to actuate the grippers lifting and lowering motion or third axis movement. Several transfer mechanism are known. They are particularly but not exclusively employed with the transfer of parts between several die stations, of a stamping production system, that utilize a two or three axis motion. For the transfer two axis motion, the first axis is the movement of the transfer bars with the grippers thereon towards and away from the parts in process, to hold and release them. The second axis corresponds to the transfer motion or the direct and linear transfer of the part between the several stations. These stations must be aligned with the same distance between them. The parts grippers are mounted on two parallel bars and properly spaced. The adequate control of these movements, results in the proper two axis transfer motion FIG. 1 shows this motion.
The efficiency of this two axis transfer system, is compromised by the need of adequate part configuration and stability to remain on top of die stations, and also without incurring any die interference between the stations.
To solve these restrictions there has been developed the three axis transfer system, this third axis corresponding to a lift motion of the parts in process before the transfer to the subsequent station, and the part lowering inside any cavity after the transfer forward travel. This lift and lowering motion avoids interferences with the dies and also permits a better parts holding condition.
However the mechanism or other systems that produce this third axis movement, are normally complex and expensive. With the the purpose to have a low cost and reliable mechanism there was developed the present "improvement in a parts transfer system, having three orthogonal movement axes wherein the part lifting and lowering mechanism moving along the third axis is actuated by the motion of the grippers in closing and opening along the first axis" movement, in which the moving action of this third axis movement or lifting axis, is obtained with a simple mechanism of levers actuated by the motion of the second movement or grippers closing and opening action. Despite the simplicity of the mechanisms, it assures a precise orthogonal motion (parts lifting and lowering). This condition is very important and many times is fundamental for the three axis movement production system.
The application shown here, see FIG. 4, is of stamping process system with five stations. However the system permits the application to a different number of stations, or applied to other processes, that have a characteristic of several aligned stations, such as, some milling and assembly operations.
In order to provide a better understanding, there follows a brief description of the drawings. Because the present mechanism is activated by the gripper closing motion of a two axis transfer, a description of this type of transfer mechanism is made by reference to the disclosure in a Brazilian patent No. PI 8701725 which had initially a protocol number SP 004.355, by the same holder of this application.
FIG. 1 shows the basic motions of a two axis transfer system.
FIG. 2 shows the basic motions of a three axis transfer system.
FIG. 3 is an end view of one side of the mechanism embodying this invention and partially the opposite side because this is similar and simetric in relation to the transfer center line.
FIG. 4 is a top view of transfer mechanism, showing only one side, the other side being symmetric to the center line.
FIG. 5 is an enlarged fragmentary view of a portion of FIG. 4 that shows the lifting mechanism.
FIG. 6 is a fragmentary side view corresponding to a portion of FIG. 4 showing the mechanism for the forward transfer motion of the parts between stations.
FIG. 7 is a view of the two cams, one for each side of the gripper transfer mechanism, that activates the gripper motion on one side, showing the detail of the cam grooves that effect the

REFERENCES:
patent: 3138128 (1964-06-01), Suofy
patent: 3754667 (1973-08-01), Storch
patent: 3760957 (1973-09-01), Berger
Soviet Inventions Illustrated, sections P, Q, week 8621, 20 Jul. 1986, (20.07,86), Derwent Publication Ltd., London, p. 71, Su-1 186 532 (Tokarev).

Affiliated with

Also associated with

Rating

Parts transfer system having three orthogonal movement axes wher does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Parts transfer system having three orthogonal movement axes wher, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Parts transfer system having three orthogonal movement axes wher will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1586799