Electric heating – Metal heating – Wire – rod – or bar bonding
Patent
1993-10-06
1995-08-29
Evans, Geoffrey S.
Electric heating
Metal heating
Wire, rod, or bar bonding
140112, B21F 2714, B21F 2710, B23K 1110
Patent
active
054462541
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a process and an installation for producing reinforced wire mesh from a number of longitudinal and transverse wires welded to each other at the crossing points of the mesh and having transverse wire end-pieces extending beyond longitudinal edge elements, wherein at least one of the projecting transverse wire end pieces is bent back in the mesh plane in the shape of a loop in respect to the longitudinal edge element and is welded to it, using a continuously operating wire mesh welding machine.
BACKGROUND
A process for producing reinforced wire mesh of the type recited hereinabove is known from Austrian Patent 373 513, wherein prefabricated transverse wires with end pieces bent back in the shape of loops are supplied to wire mesh welding machine, which requires additional manufacturing efforts because of the bent transverse wire ends, the transverse wires are difficult to handle or to store in a storage warehouse.
THE INVENTION
It is an object of the invention to provide a process and an apparatus which make it possible to produce reinforced wire mesh of the type recited hereinabove in a continuous production method. In accordance with a feature of the invention straight transverse wires are conveyed, then at least one of the transverse wire end pieces projecting beyond the longitudinal edge elements is bent back in the form of a loop in respect to longitudinal edge element ahead of the weld line of the wire mesh welding machine. The looped end is subsequently welded to the longitudinal edge element simultaneously with the welding of the longitudinal and transverse wires.
The invention makes it possible in a simple manner to produce so-called loop mesh in a continuously operating production process. All mentioned disadvantages of the known process are avoided by means of the process in accordance with the invention. The production capacity is increased at the same time.
In accordance with a feature of the invention, the straight transverse wires are separated from a stock and conveyed to the wire mesh welding machine. In accordance with another characteristic of the invention which can be employed alternatively or additionally, the wire is drawn off a supply card, straightened and conveyed crosswise to the longitudinal wire feed path, after which the wire is cut to length to form respectively one transverse wire.
The apparatus to carry out the process has a device for conveying longitudinal wires and longitudinal edge elements along a longitudinal wire feed path, a device for conveying transverse wires, previously cut to length, from stock in the direction of the longitudinal wire feed path and/or a device for conveying transverse wire from a supply crosswise to the longitudinal wire feed path and for cutting individual transverse wires to length. A resistance welding device welds the transverse wires to the longitudinal wires; In accordance with another feature of the invention. The apparatus has a device for bending at least one of transverse wire end pieces projecting beyond the longitudinal edge pieces into a loop, which is placed downstream in the longitudinal wire feed direction of the transverse wire conveying device; a device for conveying the transverse wires, provided with a loop, to the resistance welding device is associated with this loop-bending device, and the resistance welding device has a welding head in the area of at least one of the longitudinal edge elements for welding the associated bent-back loop end to the longitudinal edge element.
Preferably, one loop-bending device per wire mesh edge is provided wherein in accordance with another characteristic of the invention the loop-bending device is displaceable in the longitudinal wire feed direction for the purpose of changing the direction of the bend.
In accordance with the invention, the loop-bending device has a rotatable bending plate with an eccentric bending mandrel and, located opposite the bending plate, a central bending template which can be preferably retracted from its ope
REFERENCES:
patent: 1390293 (1921-09-01), Johnson
patent: 1961991 (1934-06-01), Southwell
patent: 2278104 (1942-03-01), Harter
patent: 3286072 (1966-11-01), Ritter et al.
patent: 3578934 (1971-05-01), Beauvais
patent: 3602269 (1971-08-01), Gott et al.
patent: 4526025 (1985-07-01), Ritter et al.
Ritter Gerhard
Ritter Klaus
Evans Geoffrey S.
EVG Entwicklungs -u. Verwertungs-Gesellschaft m.b.H.
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