EP4401912A1 - SCHWEIßVORRICHTUNG FÜR DRAHTGITTER - Google Patents
SCHWEIßVORRICHTUNG FÜR DRAHTGITTERInfo
- Publication number
- EP4401912A1 EP4401912A1 EP22792885.0A EP22792885A EP4401912A1 EP 4401912 A1 EP4401912 A1 EP 4401912A1 EP 22792885 A EP22792885 A EP 22792885A EP 4401912 A1 EP4401912 A1 EP 4401912A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- welding device
- electrodes
- wire mesh
- plane
- busbars
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
- B23K11/008—Manufacturing of metallic grids or mats by spot welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
- B23K11/115—Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/31—Electrode holders and actuating devices therefor
- B23K11/312—Electrode holders and actuating devices therefor for several electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
- B23K11/362—Contact means for supplying welding current to the electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/22—Nets, wire fabrics or the like
Definitions
- the invention relates to a welding device for wire mesh, which extends in a plane with a predetermined width and has meshes, wherein it has a large number of electrodes which are connected to transformers via current paths.
- the state of the art is the introduction of electrical energy into welding machines for the production of industrial mesh and fence mesh mats by means of medium-frequency welding via continuous busbars for the plus and minus pole (the circuit is closed via the welding transformer on the one hand and via the welding electrodes on the other the crossing longitudinal and transverse bars to be welded together ) .
- a wide variety of designs are known, with essential elements of the welding apparatus being arranged both above the grid production level and below the grid production level.
- the invention should reduce the energy consumption of welding, be inexpensive, easy to maintain and reduce the adjustment times of a welding machine. Furthermore, the quality of the welds should be increased and adjusted.
- the welding device achieves this in that two busbars are connected between all current paths and transformers, which extend on one side of the plane essentially over the width of a wire mesh mat, the busbars being firmly connected to an intermediate isolator to form a sandwich. and wherein from a first group of current paths, a plurality of lines are located on the same side of the plane Lead electrodes and lead a plurality of leads from a second set of current paths to electrodes located on the opposite side of the plane.
- busbars have bridges which are arranged alternately along their length and which are connected between the transformers and the busbars to supply energy.
- the lines to the electrodes are designed as elongated plates, the plane of which extends in the interstices of parallel longitudinal wires that can be welded in the welding device.
- the transformers are medium-frequency transformers.
- busbars are connected to the plates via elastic path pieces and that the plates can be driven in a movable manner from and to the grid plane.
- the electrodes are combined in a large number of assemblies made up of at least two electrodes located opposite one another, with each assembly being electrically connected to a line.
- FIG. 1 is a side view of the welding device according to the invention
- FIG. 2 is a perspective view thereof
- FIG. 3 to 5 and Figs. 3A to 5A further perspective views of other embodiments.
- Wire mesh mats which are produced in an automated process, extend in a plane E in the X and Y directions, with a group of longitudinal wires LD being fed in the X direction and the welded wire mesh mat being pulled out in the same X direction behind a welding portal.
- the required welding device extends in the Y-direction along the width of a wire mesh mat and intermittently guides electrodes 7 in the Z-direction perpendicular to the X- and Y-direction to the longitudinal wires LD in order to weld transverse wires QD that are kept ready to them.
- Fig. 1 almost all of the mechanical and current-carrying elements of the welding device are now on just one side of plane E. Whether the desired side is above or below level E is not relevant to the invention. In the context of the example shown, the welding device is situated substantially graphically above the plane E.
- Opposite electrodes 7 are connected to transformers 3 via current paths 4 . Since there must be a large number of pairs of electrodes 7 across the width of the mat, the current paths 4 are connected to the transformers 3 via two busbars 1 of both polarities. Each busbar 1 is for a group of overhead or underlying electrodes 7 provided. The busbars 1 are firmly connected to one another to form a sandwich, together with an insulator 5 lying between them. This creates spatial compactness, which is an advantage in wire mesh welding plants with many bulky mechanical elements (not shown).
- bridges 2 protrude alternately on both busbars 1 in order to close the required contacts to produce the transformers 3.
- the bridges 2 of the two busbars 1 are dimensioned sufficiently large in view of the electrical requirements and spaced sufficiently far apart. In this way, the outer surfaces of the busbars 1 remain free in order to be able to offer space for the numerous current paths 4 of the electrodes 7 that are required.
- a current path 4 comprises copper as usual; it is also designed in such a way that it meets the electrotechnical specifications, i.e. has sufficiently large line cross-sections, is at least partially movable in order to move the electrodes 7 to the weld metal in cycles, and makes use of the few spaces available in the production process for wire mesh mats.
- an elastic path piece 4.1 leads away from the busbars 1 and is then connected to a plate 4.2 for upper electrodes 7 or to a plate 4.3 for opposite electrodes 7.
- the plates 4.3 for the electrodes 7 lying opposite or lying below the plane E lead through interspaces which are formed by the supplied parallel longitudinal wires LD.
- this part of the current path 4 is designed as a flat plate 4.3 lying parallel to the longitudinal wires LD.
- plates 4.2 which are aligned in parallel, are provided according to the invention.
- the current path 4 merges into assemblies 4.4, each of which has one or more, preferably three, electrodes 7 on each side.
- the assemblies 4.4 also form pairs on both sides of the lattice plane.
- the bundling achieves an even current distribution and a mechanically constantly controllable contact pressure during welding. resulting in a high quality and balance between the welds.
- the dimensions of the plates 4 .2 and 4 . 3 are designed according to specifications and considerations with regard to the current and voltage magnitudes, the uniformity among each other with regard to the welding result and the grid of the line wires LD (distance of the line wires LD to one another) .
- the dimensions may be different from each other or different between the groups of the upper and lower electrodes 7 . In any case, it is advantageous to design this part of the copper path in the geometry of plates, the plate plane of which is aligned along the axes of the longitudinal wires LD, and which, in the case of a group of electrodes 7, extend in the interstices of longitudinal wires LD.
- the electrodes 7 are not centered on a plate 4 . 2, 4. 3 , but essentially via the assemblies 4 . 4 arranged at a corner. This allows the plates 4 . 2, 4. 3 extend where unwelded longitudinal wires LD are supplied and the required gaps are still available. These gaps are then filled by the shot-in transverse wires QD and can no longer be used.
- the fig . 3 to fig. 5 and figs. 3A to 5A illustrate what has been described in perspective from different angles and with exemplary line wires LD and transverse wires QD lying in the plane E.
- the invention consists in the combination of medium-frequency welding technology with the newly designed arrangement of the two continuous busbars 1 in sandwich construction and the overlapping electrical energy input via the transformers 3 everything above or below the grid production level E.
- the further current path 4 to the welding nodes takes place in this way via the extremely compact copper path with few contact points, which leads to a minimization of the voltage drops along the current path 4, whereby a low-loss (both inductive and ohmic) and energy-efficient welding is guaranteed becomes .
- the space requirement of the secondary busbar system is small compared to other welding machines, which also means that less material is used (especially copper).
- the system according to the invention also results in the following advantages with regard to the changeover times of a welding system for wire mesh mats with different pitches and/or different wire diameters. Due to the construction according to the invention, the changeover times when changing products can be kept to a minimum, since the electrodes 7 (or the assemblies with the welding rams) can simply be moved and repositioned in the required area. This also reduces the number of changeover steps, which again saves time. Thirdly, various assemblies 4 . 4 designed for the welding electrodes (or electrode holders) in order to simplify and shorten a change of properties of successively produced wire mesh mats. About the Assembly 4 . 4, one or more spot welds can be welded with just one welding ram. This is made possible by the special design and energy input, in which the secondary welding voltage is kept the same over the entire welding width. This ensures an even distribution of current to all welding points, which in turn increases product quality.
- a positive side effect, together with the medium-frequency welding technology, is that, according to the invention, the number of transformers 3 can be varied within a certain number range, as a result of which the welding machine can be perfectly adapted to customer specifications. Due to the selected design, the positions of the transformers 3 can be shifted within a certain spatial range, which also means that the welding machine can be perfectly adapted to the customer and product requirements.
- a disadvantage of the medium-frequency welding technology is e.g. T. a magnetization of the parts.
- T. a magnetization of the parts.
- the magnetization of the potentially magnetizable components is advantageously kept low.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Resistance Welding (AREA)
- Wire Processing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA50725/2021A AT525390B1 (de) | 2021-09-15 | 2021-09-15 | Schweißvorrichtung für Drahtgitter |
| PCT/IB2022/058721 WO2023042121A1 (de) | 2021-09-15 | 2022-09-15 | SCHWEIßVORRICHTUNG FÜR DRAHTGITTER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4401912A1 true EP4401912A1 (de) | 2024-07-24 |
Family
ID=83899847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22792885.0A Pending EP4401912A1 (de) | 2021-09-15 | 2022-09-15 | SCHWEIßVORRICHTUNG FÜR DRAHTGITTER |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240375205A1 (de) |
| EP (1) | EP4401912A1 (de) |
| AT (1) | AT525390B1 (de) |
| WO (1) | WO2023042121A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT264992B (de) * | 1966-02-04 | 1968-09-25 | Evg Enwicklungs U Verwertungsg | Einrichtung zur Änderung der Längsdrahtteilung bei einer nach der Doppelpunktschweißmethode arbeitenden Gitterschweißmaschine |
| AT390578B (de) * | 1988-03-31 | 1990-05-25 | Evg Entwicklung Verwert Ges | Vielpunkt-schweissmaschine |
| EP1426132A1 (de) * | 2002-12-06 | 2004-06-09 | H.A. Schlatter Ag | Gitterschweissmaschine |
| DE10333363B4 (de) * | 2003-07-23 | 2005-06-09 | Ideal - Werk C. + E. Jungeblodt Gmbh + Co | Gitterschweißmaschine, insbesondere zum Schweißen von Industriedrahtgittern |
| AT413956B (de) * | 2004-03-25 | 2006-07-15 | Evg Entwicklung Verwert Ges | Schweissmaschine zum herstellen von drahtgittermatten |
-
2021
- 2021-09-15 AT ATA50725/2021A patent/AT525390B1/de active
-
2022
- 2022-09-15 EP EP22792885.0A patent/EP4401912A1/de active Pending
- 2022-09-15 US US18/692,085 patent/US20240375205A1/en active Pending
- 2022-09-15 WO PCT/IB2022/058721 patent/WO2023042121A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023042121A1 (de) | 2023-03-23 |
| AT525390A1 (de) | 2023-03-15 |
| US20240375205A1 (en) | 2024-11-14 |
| AT525390B1 (de) | 2025-03-15 |
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| AK | Designated contracting states |
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| DAX | Request for extension of the european patent (deleted) | ||
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