Wireworking – Joining wire – Electric welding
Patent
1995-02-14
1997-07-15
Larson, Lowell A.
Wireworking
Joining wire
Electric welding
2989731, B21F 2700
Patent
active
056474067
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a process for manufacturing a grid, in particular a pressed grid, as well as to a device for the manufacturing of such grid.
One aim of the invention is to provide a clean and quick manufacturing of a grid in which the process steps are well coordinated.
It is also an aim of the invention to provide a device for the manufacturing of a grid, in particular a pressed grid, by means of which such a grid can be manufactured in a simple and uncomplicated manner using a few manufacturing steps.
A further aim of the invention is to manufacture a grid free of distortions.
The present invention accomplishes this aim in that the grid consists of a plurality of carrying bars and of filling bars which can be inserted into the carrying bars, in that both the carrying bars and the filling bars are supplied by supply devices to a pressing station, the pressing station having a holding device for the carrying bars and an actuating device for receiving and pressing the filling bars to be inserted, in that, after the bars have been pressed, the holding device is moved forward by a freely selectable distance and the actuating device is moved in such a manner that another filling bar is moved from a supply position to a working position, and in that the grid is subjected to a finishing process after all bars which form the grid are pressed together.
After pressing together of the carrying bars and the filling bars it may also be provided that the removal of the grid from the pressing station is effected by means of a removal conveyor, and that the grid is subsequently provided with a rim profile.
According to the invention there is provided a device for manufacturing a grid, which is characterised in that the pressing station comprises a holding beam for receiving the carrying bars and an actuating device for receiving and pressing in of the filling bars, which actuation device can be rotated against the holding beam, and in that there are provided transport devices for transporting the filling bars as well as for transporting the carrying bars to the corresponding sections in the pressing station.
In further development of the present invention, this device can be arranged in such a manner that the holding beam is provided with grooves for receiving the carrying bars and with a fixing device for fixing the carrying bars, the holding beam preferably having a plurality of parallel grooves.
According to a further embodiment of the invention, the fixing device can be provided by an eccentric clamping device which comprises a press on shaft which fixes the carrying bar in the groove and an actuating element which works together with the press-on shaft.
Advantageously, it is provided that the press-on shaft extends through each groove; in a further embodiment, each press-on shaft extends through the groove in an eccentric fashion with respect to it's cross section.
Advantageously, the press-on shaft comprises on the section which extends through the groove a fixing piece arranged in extension of the shaft body, which fixing piece is preferably a cylindrical segment, the cross section axis of the cylindrical segment extending parallel to the insertion direction of the press-on shaft in the holding beam and extending outside of the groove in the non-fixed position.
According to a further embodiment of the invention, it can be provided that the press-on shaft is provided on the section which works together with the actuating element with a meshing part which is surrounded by a recess in the actuating element, the meshing part being advantageously arranged within the cross section of the shaft.
In accordance with yet another embodiment of the invention, the actuating element is driven hydraulically. Ideally, the actuating element meshes, with the press-on shaft in such a manner that the press-on shaft rotates upon longitudinal movement of the actuating element, therewith fixing the carrying bar in the groove.
The rotation angle can be selected freely and is dependent of the stroke length of the meshing
REFERENCES:
patent: 2401319 (1946-06-01), Roemer
patent: 3427701 (1969-02-01), McDonnell
patent: 4328409 (1982-05-01), Senn
Feiereisen Henry M.
Larson Lowell A.
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