Key information

Title
Method for combining a stack of thick plates into an integral whole by laser welding
Application number
20190850
Case type
National
Status
12.05.2023 Opphevet etter innsigelse
Filed
05.07.2019
Effective date
05.07.2019
Publicly available
06.01.2021
Applicant
CRACON AS (NO)
Owner
CRACON AS (NO)
Inventor
Karl Bernhard Opstad (NO)
Agent
ACAPO AS (NO)
Granted
15.02.2021
Patent number
345462

Abstract and drawing

Disclaimer: This text has been machine-scanned and may contain errors – please refer to "Publications" for legally binding content.
A method for welding a thick plate (110, 120) into a welded assembly (110), is provided, comprising the steps: a) on a first plate placing a second plate having a periphery, in direct contact with the first plate, and b) through welding the second plate to the first plate.

Publications

B1A1
Checking availability of the latest published version...

Documents

 Expand Download files (81)
Date
 Date Doc. No. Process Case number In/Out Journal description To/from
09.04.2024 08-01 Klage til Klagenemda (KFIR) 2023/00289 INN E-post fra KFIR
09.04.2024 07-01 Klage til Klagenemda (KFIR) 2023/00289 INN Avgjørelse 23-00106
05.12.2023 13-01 Saksbehandling 20190850(345462) UT PT Påminnelse om ikke betalt årsavgift (3329) (PT20190850) ACAPO AS
08.09.2023 06-02 Klage til Klagenemda (KFIR) 2023/00289 UT Korrespondanse (Hovedbrev inn)
08.09.2023 06-01 Klage til Klagenemda (KFIR) 2023/00289 UT OP05: Oversendelse Klagenemnda for industrielle rettigheter
05.09.2023 05-01 Klage til Klagenemda (KFIR) 2023/00289 INN Korrespondanse (Hovedbrev inn) BRYN AARFLOT AS
22.08.2023 04-06 Klage til Klagenemda (KFIR) 2023/00289 UT OP05: Oversendelse
22.08.2023 04-05 Klage til Klagenemda (KFIR) 2023/00289 UT O1294NO00 - Klage til Patentstyret
22.08.2023 04-04 Klage til Klagenemda (KFIR) 2023/00289 UT O1294NO00 - Brev til Patentstyret
22.08.2023 04-03 Klage til Klagenemda (KFIR) 2023/00289 UT Korrespondanse (Hovedbrev inn)
22.08.2023 04-02 Klage til Klagenemda (KFIR) 2023/00289 UT Nytt overprøvningskrav (OP)
22.08.2023 04-01 Klage til Klagenemda (KFIR) 2023/00289 UT OP05: Oversendelse Klagenemnda for industrielle rettigheter
17.07.2023 03-02 Klage til Klagenemda (KFIR) 2023/00289 INN O1294NO00 - Brev til Patentstyret ACAPO AS
17.07.2023 03-01 Klage til Klagenemda (KFIR) 2023/00289 INN Korrespondanse (Hovedbrev inn) ACAPO AS
17.07.2023 02-01 Klage til Klagenemda (KFIR) 2023/00289 UT OP05: Oversendelse ACAPO AS
12.07.2023 01-02 Klage til Klagenemda (KFIR) 2023/00289 INN O1294NO00 - Klage til Patentstyret ACAPO AS
12.07.2023 01-01 Klage til Klagenemda (KFIR) 2023/00289 INN Nytt overprøvningskrav (OP) ACAPO AS
 16.05.2023 17-02 Innsigelse 2021/00460 UT IAIN07P- Avgjørelse - innsigelse_1708959
16.05.2023 17-01 Innsigelse 2021/00460 UT OP09: Oversendelse med avgjørelse BRYN AARFLOT AS
 16.05.2023 16-02 Innsigelse 2021/00460 UT IAIN07P- Avgjørelse - innsigelse_1708959
16.05.2023 16-01 Innsigelse 2021/00460 UT OP09: Oversendelse med avgjørelse ACAPO AS
 12.05.2023 15-01 Innsigelse 2021/00460 UT Opp til avgjørelse BRYN AARFLOT AS
 06.10.2022 14-01 Innsigelse 2021/00460 INN Korrespondanse (Hovedbrev inn) BRYN AARFLOT AS
 06.10.2022 11-01 Innsigelse 2021/00065 INN Korrespondanse (Hovedbrev inn) BRYN AARFLOT AS
26.09.2022 13-02 Innsigelse 2021/00460 UT P19622NO00 - Besvarelse
26.09.2022 13-01 Innsigelse 2021/00460 UT Oversendelse BRYN AARFLOT AS
 16.09.2022 12-02 Innsigelse 2021/00460 INN P19622NO00 - Besvarelse ACAPO AS
 16.09.2022 12-01 Innsigelse 2021/00460 INN Korrespondanse (Hovedbrev inn) ACAPO AS
 16.06.2022 11-02 Innsigelse 2021/00460 UT 138972 Tilsvar fra innsiger revidert 120522_clean
16.06.2022 11-01 Innsigelse 2021/00460 UT Oversendelse ACAPO AS
 08.06.2022 12-02 Saksbehandling 20190850(345462) INN P19622NO00 - Styrebrev ACAPO AS
 08.06.2022 12-01 Saksbehandling 20190850(345462) INN Korrespondanse (Hovedbrev inn) ACAPO AS
 13.05.2022 09-02 Innsigelse 2021/00460 INN 138972 Tilsvar fra innsiger revidert 120522_clean BRYN AARFLOT AS
 13.05.2022 09-01 Innsigelse 2021/00460 INN Korrespondanse (Hovedbrev inn) BRYN AARFLOT AS
 25.04.2022 07-02 Innsigelse 2021/00460 UT P19622NO00 - Vedr. innsigelse mot norsk patent
25.04.2022 07-01 Innsigelse 2021/00460 UT Oversendelse BRYN AARFLOT AS
 08.04.2022 10-01 Innsigelse 2021/00065 INN Korrespondanse (Hovedbrev inn) BRYN AARFLOT AS
 08.04.2022 10-01 Innsigelse 2021/00460 INN Korrespondanse (Hovedbrev inn) BRYN AARFLOT AS
 28.02.2022 08-02 Innsigelse 2021/00460 INN P19622NO00 - Vedr. innsigelse mot norsk patent ACAPO AS
 28.02.2022 08-01 Innsigelse 2021/00460 INN Korrespondanse (Hovedbrev inn) ACAPO AS
 23.11.2021 09-02 Innsigelse 2021/00065 UT 202100460_Generelt brev
23.11.2021 09-01 Innsigelse 2021/00065 UT Oversendelse ADVOKATFIRMAET HAAVIND AS
 23.11.2021 08-01 Innsigelse 2021/00065 INN 202100460_Generelt brev
23.11.2021 06-01 Innsigelse 2021/00460 UT Generelt brev BRYN AARFLOT AS
 29.10.2021 05-02 Innsigelse 2021/00460 UT Bilag 9
29.10.2021 05-01 Innsigelse 2021/00460 UT Oversendelse av innsigelse IN01P ACAPO AS
 29.10.2021 04-04 Innsigelse 2021/00460 UT Bilag 8
29.10.2021 04-03 Innsigelse 2021/00460 UT Bilag 7
29.10.2021 04-02 Innsigelse 2021/00460 UT Bilag 6
29.10.2021 04-01 Innsigelse 2021/00460 UT Oversendelse av innsigelse IN01P ACAPO AS
 28.10.2021 03-01 Innsigelse 2021/00460 UT Bekreftelse BRYN AARFLOT AS
 28.10.2021 02-11 Innsigelse 2021/00460 UT Innsigelse mot patent NO345462
28.10.2021 02-10 Innsigelse 2021/00460 UT Bilag 5
28.10.2021 02-09 Innsigelse 2021/00460 UT Bilag 4
28.10.2021 02-08 Innsigelse 2021/00460 UT Bilag 3
28.10.2021 02-07 Innsigelse 2021/00460 UT Bilag 2
28.10.2021 02-06 Innsigelse 2021/00460 UT Bilag 1
28.10.2021 02-05 Innsigelse 2021/00460 UT A4 Peter Nilsson Chalmers
28.10.2021 02-04 Innsigelse 2021/00460 UT A3 US2018043472
28.10.2021 02-03 Innsigelse 2021/00460 UT A2 JP2005305461
28.10.2021 02-02 Innsigelse 2021/00460 UT A1 JPH05131284
28.10.2021 02-01 Innsigelse 2021/00460 UT Oversendelse av innsigelse IN01P ACAPO AS
 27.10.2021 01-16 Innsigelse 2021/00460 INN Innsigelse mot patent NO345462 BRYN AARFLOT AS
 27.10.2021 01-15 Innsigelse 2021/00460 INN Bilag 10 - signert fullmakt BRYN AARFLOT AS
 27.10.2021 01-14 Innsigelse 2021/00460 INN Bilag 9 BRYN AARFLOT AS
 27.10.2021 01-13 Innsigelse 2021/00460 INN Bilag 8 BRYN AARFLOT AS
27.10.2021 01-12 Innsigelse 2021/00460 INN Bilag 7 BRYN AARFLOT AS
 27.10.2021 01-11 Innsigelse 2021/00460 INN Bilag 6 BRYN AARFLOT AS
 27.10.2021 01-10 Innsigelse 2021/00460 INN Bilag 5 BRYN AARFLOT AS
 27.10.2021 01-09 Innsigelse 2021/00460 INN Bilag 4 BRYN AARFLOT AS
27.10.2021 01-08 Innsigelse 2021/00460 INN Bilag 3 BRYN AARFLOT AS
 27.10.2021 01-07 Innsigelse 2021/00460 INN Bilag 2 BRYN AARFLOT AS
27.10.2021 01-06 Innsigelse 2021/00460 INN Bilag 1 BRYN AARFLOT AS
27.10.2021 01-05 Innsigelse 2021/00460 INN A4 Peter Nilsson Chalmers BRYN AARFLOT AS
 27.10.2021 01-04 Innsigelse 2021/00460 INN A3 US2018043472 BRYN AARFLOT AS
 27.10.2021 01-03 Innsigelse 2021/00460 INN A2 JP2005305461 BRYN AARFLOT AS
 27.10.2021 01-02 Innsigelse 2021/00460 INN A1 JPH05131284 BRYN AARFLOT AS
 27.10.2021 01-01 Innsigelse 2021/00460 INN Nytt overprøvningskrav (OP) BRYN AARFLOT AS
 07.09.2021 07-01 Innsigelse 2021/00065 UT Generelt brev ADVOKATFIRMAET HAAVIND AS
 02.03.2021 06-02 Innsigelse 2021/00065 INN 2021-03-02 Fullmakt i innsigelsessak OP2021_00065 ADVOKATFIRMAET HAAVIND AS
 02.03.2021 06-01 Innsigelse 2021/00065 INN Korrespondanse (Hovedbrev inn) ADVOKATFIRMAET HAAVIND AS
 19.02.2021 11-01 Saksbehandling 20190850(345462) UT PT Registreringsbrev Nasjonal Patent (15) (PT20190850)
18.02.2021 05-01 Innsigelse 2021/00065 UT Oversendelse av innsigelse IN01P ACAPO AS
 18.02.2021 04-01 Innsigelse 2021/00065 UT Bekreftelse ADVOKATFIRMAET HAAVIND AS
 18.02.2021 03-01 Innsigelse 2021/00065 UT Bekreftelse ADVOKATFIRMAET HAAVIND AS
18.02.2021 02-03 Innsigelse 2021/00065 UT Innsigelse Patentstyret.pdf
18.02.2021 02-02 Innsigelse 2021/00065 UT Avtale - Helgeland VM og Cracon 11.07.2018 signert
18.02.2021 02-01 Innsigelse 2021/00065 UT Oversendelse av innsigelse IN01P ACAPO AS
12.02.2021 01-03 Innsigelse 2021/00065 INN Innsigelse Patentstyret.pdf ADVOKATFIRMAET HAAVIND AS
12.02.2021 01-02 Innsigelse 2021/00065 INN Avtale - Helgeland VM og Cracon 11.07.2018 signert ADVOKATFIRMAET HAAVIND AS
12.02.2021 01-01 Innsigelse 2021/00065 INN Nytt overprøvningskrav (OP) ADVOKATFIRMAET HAAVIND AS
 04.02.2021 10-02 Saksbehandling 20190850 INN Betalingskvittering ACAPO AS
 04.02.2021 10-01 Saksbehandling 20190850 INN Korrespondanse (Hovedbrev inn) ACAPO AS
 01.02.2021 09-01 Saksbehandling 20190850 UT PT Meddelelse om patent ACAPO AS
 30.10.2020 08-04 Saksbehandling 20190850 INN P19622NO00 - Krav oversatt til norsk ACAPO AS
 30.10.2020 08-03 Saksbehandling 20190850 INN P19622NO00 - Besvarelse av uttalelse ACAPO AS
 30.10.2020 08-02 Saksbehandling 20190850 INN P19622NO00 - Beskrivelse og krav ACAPO AS
 30.10.2020 08-01 Saksbehandling 20190850 INN Korrespondanse (Hovedbrev inn) ACAPO AS
 30.07.2020 07-01 Saksbehandling 20190850 UT Realitet patent ACAPO AS
 08.04.2020 06-02 Saksbehandling 20190850 INN Hovedbrev ACAPO AS
 08.04.2020 06-01 Saksbehandling 20190850 INN Korrespondanse (Hovedbrev inn) ACAPO AS
 28.01.2020 05-02 Saksbehandling 20190850 UT PT_report 01:28:03
28.01.2020 05-01 Saksbehandling 20190850 UT Realitet patent ACAPO AS
 17.09.2019 04-03 Saksbehandling 20190850 INN Overdragelsesdokument ACAPO AS
 17.09.2019 04-02 Saksbehandling 20190850 INN Fullmakt ACAPO AS
 17.09.2019 04-01 Saksbehandling 20190850 INN Korrespondanse (Hovedbrev inn) ACAPO AS
 11.07.2019 03-01 Saksbehandling 20190850 UT Formalia 1 ACAPO AS
 11.07.2019 02-01 Saksbehandling 20190850 UT Infobrev til oppfinner ACAPO AS
 05.07.2019 01-03 Saksbehandling 20190850 INN Patenttegninger ACAPO AS
 05.07.2019 01-02 Saksbehandling 20190850 INN Beskrivelse ACAPO AS
 05.07.2019 01-01 Saksbehandling 20190850 INN Søknadsskjema Patent ACAPO AS

Description, claims and drawings

Disclaimer: This text has been machine-scanned and may contain errors – please refer to "Publications" for legally binding content. Description
TITLE: Method for Combining a Stack of Thick Plates into an Integral Whole by Laser WeldingField of the InventionThe invention relates to plate welding in general and more specifically a method for laser welding of thick metal plates.Background ArtState of the art is reflected in welding wherein a material in a first plate is locally heated above the melting point and attached to a second plate. Heating can be performed in many ways such as laser welding.Laser welding as a method for joining metal sheets by welding through one plate and into an underlying plate is nothing new and is used, for example, extensively in the automotive industry. Typical plate thickness in the automotive industry is in the order of 1 mm.Reinforcement of structures by conventional welding methods is only possible by welding along the edges of the reinforcing elements, and a large number of reinforcement plates may be required to reinforce a given area. This can, for example, require positioning and welding of ten smaller plates compared to one larger plate being required when laser technology is applied.From prior art one should refer to JP 2001162388 which describes laser welding of two plates having a thickness of 0.8 – 2 mm, wherein the laser is moved in a pattern such as a band or stitching.However, there has to be a gap between the plates during welding.One should also refer to WO2018145222 which describes a method for laser welding of light metal bodies wherein one body is positioned to overlap the second body before welding the overlapping area using laser welding. The laser melts the first and the second body in a welding path in order to form a weld wherein the bodies can be thin plates having a thickness of 0.4 – 0.6 mm.However, the welding has to be repeated in order to achieve sufficient strength.Also one should refer to US 2015352672 which describes a method for laser welding of galvanised steel plates arranged to overlap, wherein the first plate has a thickness of 1.4 mm and the second has a thickness of 0.65 mm.However also this requires a gap between the plates prior to welding.Furthermore, one should refer to JP H07155974 which describes a method for welding of thin metal sheets in a manner similar to WO2018145222.However, one of the plates is provided with protrusions forming a gap when the plates are brought into contact with each other.One should also refer to EP 1919652 which describes a method for joining at least two thin plates using laser through-welding, wherein the weld extends along protrusions provided in one plate, having a line form.However, at least one of the plates have to be provided with protrusions and moreover a protective layer is applied to at least one of the plates.Finally, one should refer to EP 3112077 which describes laser welding of plates having a thickness of 0.8 mm, wherein the plates are arranged to overlap and laser through-welding is used.However, this solution requires welding from both sides, forming a weld penetrating both plates. It is also specified that the laser is moved in a circle.Furthermore one should refer to US 2018/043472 which relates to a method of laser welding a workpiece stack-up. The disclosed method includes directing a laser beam at a top surface of the workpiece stack-up to create a molten metal weld pool and, optionally, a keyhole, and further gyrating the laser beam to move a focal point of the laser beam along a helical path having a central helix axis oriented transverse to the top and bottom surfaces of the workpiece stack-up.WO 2017/124216 relates to method of laser spot welding a workpiece stack-up(10) that includes at least two overlapping steel workpieces(12,14), at least one of which includes a surface coating(40), is disclosed. There is therefore a need for a method and a system to overcome the abovementioned problems.Problems to be Solved by the InventionTherefore, a main objective of the present invention is to provide a method for combination of two or more preferably thick stacked metal plates by welding.Means for Solving the ProblemsThe objective is achieved according to the invention by a method for welding of thick plates as defined in the preamble of claim 1, having the features of the characterising portion of claim 1, and a use of the method as defined in the preamble of claim 11, having the features of the characterising portion of claim 11.A number of non-exhaustive embodiments, variants or alternatives of the invention are defined by the dependent claims.The present invention attains the above-described objective by a method for welding one or more thick plates into a welded assembly.In a first aspect of the invention a method for welding a thick plate into a welded assembly is provided, comprising the steps:a) on a first plate placing a second plate having a periphery, in direct contact with the first plate, wherein the first and second plates are of materials that do not form unacceptable bubbling in the metal when heated, and wherein the second plate is a thick plate having a thickness greater than 3 mm, andb) through welding the second plate to the first plate.In a preferred embodiment the method further comprises the step of positioning a third plate as an interposer between the first and second plate before step b), and step b) also involves welding through the third plate.In another preferred embodiment the plates comprise metals that are selected from the group comprising ferrous materials, nickel alloys and copper alloys, and the group comprising titanium and zirconium. In a further preferred embodiment the through welding is performed using laser welding.In a more preferred embodiment the through welding is performed using laser welding with a power of 4 – 30 kW.In one embodiment the first and second plates are welded within the periphery of the second plate.In a preferred embodiment the first and second plates are welded within the periphery of the second plate using a pattern from the group comprising closed geometric patterns enclosing a volume such as rectangular pattern, hexagon pattern, and circles, and open geometric patterns such as spots, spirals, and meanders.In one embodiment the first and second plates are welded along the periphery of the second plate.In one further embodiment the second plate comprises a plurality of adjoining plates, wherein the adjoining plates are bonded together and welded to the first plate in one operation.In yet another embodiment subsequent plates are welded according to any of the above methods, on plates having been welded according to any of the above methods.In a further embodiment subsequent plates are welded on an opposite side of the welded assembly.In a second aspect of the invention a use of any of the above methods for strengthening an existing plate by welding in a strengthening plate, is provided.In a third aspect of the invention a welded assembly made using any of the above methods, is provided.Effects of the InventionThe present invention comprises a technological advantage over known systems and methods by use of thick plates, that is plates thicker than 3 mm.The present invention provides several further advantageous effects:it makes it possible to weld in strengthening members,it makes it possible to weld corrosion resistant metal plates over metals susceptible to corrosion such as carbon steel,it makes it possible to repair by welding in plates over a defect, it makes it possible to apply a small number of large plates rather than many edge-welded smaller plates,it makes it possible to make weld seams in one pass, andit makes it possible to complete a welding task much faster.The above and further features of the invention are set forth with particularity in the appended claims and together with advantages thereof will become clearer from consideration of the following detailed description of an [exemplary] embodiment of the invention given with reference to the accompanying drawings.The invention will be further described below in connection with exemplary embodiments which are schematically shown in the drawings, wherein:Fig. 1 shows a strengthening plate overlaid a bulkhead plate, with intersecting welding lines,Fig. 2 shows a cross section of Fig.1, andFig. 3 shows variant of a cross section of Fig.1 with an interposer.Description of the Reference SignsThe following reference numbers and signs refer to the drawings:Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein one skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented, or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.The invention will be further described in connection with exemplary embodiments which are schematically shown in the drawings, wherein Fig. 1 shows a strengthening plate overlaid a bulkhead plate, with intersecting welding lines.Thin plate welding is well known, wherein plates are up to 3 mm thick. Many metals oxidise easily and the oxides release oxygen gas when the metal is heated and liquefied. This causes bubbles and welding defects that should be avoided.In the context of this disclosure a thin plate is less than 3 mm thick, whereas a thick plate is at least 3 mm thick, typically 6 – 15 mm thick.Principles forming the basis of the inventionWelding is performed by heating metal until it is locally liquefied and bonds two or more bodies, typically plates. The inventor has realised that thick plates can be laser welded without formation of significant welding defects. Typically steel is suitable for this method of welding, but light metals with an insulating, protective oxide layer with a high melting point, such as aluminium and magnesium, are less suitable.The embodiment of the method for forming a welded assembly 100 according to the invention shown in Fig.1 and 2 comprises placing a first plate 110 in overlapping contact with a second plate 120, wherein the plates are of materials that do not form unacceptable bubbling in the metal when heated. The second plate 120 is of a thickness greater than 3 mm. The first plate can be thicker or thinner. Normally if the first plate is thinner one would want to weld from the opposite site. In some cases that can be impossible, for instance due to other obstructions on the inside.Next the plates are through welded using laser welding. The welding seams 130 can be a peripheral welding seam and interior welding seams 132, 134 applied.If deemed necessary, the operations described above, can be repeated with an additional plate welded to plate 110 from the other side.More than one plate can also be welded from one side with additional plate(s) welded onto plate 120.Best Modes of Carrying Out the InventionIn a typical application of an embodiment of the method for forming a welded assembly 100 according to the invention the first plate 110 is a bulkhead plate of a ship or a tank. A second plate 120 for strengthening, repair and/or corrosion protection is brought in overlapping contact with the bulkhead plate. Next a laser is used to perform through welding between the plates, typically starting with an inner pattern. Typically a laser source with a power of 4 – 30 kW is used, which gives an effective welding speed of 3 - 10 m / min. The laser beam is transferred from the source to the workpiece through an optical fibre.Fig. 1 shows how horizontal 132 and vertical 134 welding seams are applied to the second plate 120 placed over the bulkhead plate 110. It has been found that a pattern of perpendicular lines provides good strengthening when the plates are subjected to forces straining the plates. It is also preferred to weld along the periphery 136. These lines form a rectangular pattern.Where necessary several plates will be required to cover the complete area, where strengthening is required. In such cases, the interface between adjoining plates will be butt welded and connected to the underlying plate in one laser welding operation. Fig. 2 shows a cross section of Fig. 1 and shows how the welding seams penetrate the strengthening plate and into the bulkhead plate. It has been found that welding of ferrous materials works well, including partially corroded steel. Also nickel, copper, and titanium have been found to work well. Alternative EmbodimentsA number of variations on the above can be envisaged. For instance the horizontal and vertical pattern of welding seams can be replaced by a closed geometric pattern enclosing a volume such as hexagon pattern, and circles, or open geometric pattern letting gas escape by not enclosing a volume such as spots, spirals, and meanders, and other patterns that substantially fill the contact area inside the periphery.Fig. 3 shows an embodiment where a third plate 140 is applied as an interposer between the first and the second plate. During welding the second and third plate are both welded through and into the first plate.It is also possible to weld further plates (not shown) on top of existing plates 120, 140 in subsequent welding. This is advantageous in cases where the single plates are too heavy to position comfortably. Instead a plurality of thinner plates are sequentially welded into a composite.It is also within the scope of this invention to perform the above described processes on both sides of a plate such as a bulkhead plate, including sequential welding of a plurality of plates.In a further variation the plate 120 can be subdivided into smaller plates that are still thick, wherein the plates are butt welded together. This is another useful way to overcome the problems involving heavy plates in an environment with many obstructions.The invention according to the application finds use in strengthening of existing structures as well as repair such as covering holes and damages.
Claims
Claims1. A method for welding a thick plate (110, 120) into a welded assembly (100), comprising the steps:a) on a first plate (110) placing a second plate (120) having a periphery, in direct contact with the first plate (110),wherein the first and second plates (110, 120) are of materials that do not form unacceptable bubbling in the metal when heated, andwherein the second plate is a thick plate having a thickness greater than 3 mm, andb) through welding the second plate to the first plate,wherein the through welding is performed using laser welding.2. The method according to claim 1, further comprising the step of positioning a third plate (140) as an interposer between the first and second plate before step b), and step b) also involves welding through the third plate (140).3. The method according to claim 1 or 2, wherein the plates comprise metals that are selected from the group comprising ferrous materials, nickel alloys and copper alloys, and the group comprising titanium and zirconium.4. The method according to claim 1, wherein the through welding is performed using laser welding with a power of 4 – 30 kW.5. The method according to claim 1 – 4, wherein the first and second plates are welded within the periphery of the second plate.6. The method according to claim 5, wherein the first and second plates are welded within the periphery of the second plate using a pattern from the group comprising closed geometric patterns enclosing a volume such as rectangular pattern, hexagon pattern, and circles, and open geometric patterns such as spots, spirals, and meanders.7. The method according to claim 1 – 6, wherein the first and second plates are welded along the periphery of the second plate.8. The method according to claim 1 – 7, wherein the second plate (120) comprises a plurality of adjoining plates, wherein the adjoining plates are bonded together and welded to the first plate in one operation.9. The method according to claim 1 – 8, wherein subsequent plates are welded according to the method according claim 1 – 8, on plates having been welded according to the method according claim 1 – 8.10. The method according to claim 1 – 9, wherein subsequent plates are welded on an opposite side of the welded assembly (100).11. A use of a method according to claims 1 – 10 for strengthening an existing plate (110) by welding in a strengthening plate (120).PATENTKRAV1. En framgangsmåte for sveising av en tykk plate (110, 120) til en sveiset sammenstilling (100), omfattende trinnene:a) på en første plate (110) anbringe en andre plate (120) med en omkrets, i direkte kontakt med den første platen (119),idet den første og den andre platen (110, 120) er av materialer som ikke danner uakseptabel bobling i metallet ved oppvarming, ogidet den andre platen er en tykk plate med tykkelse større en 3 mm, og b) gjennomsveise den andre platen til den første platen,idet gjennomsveisingen er utført med lasersveising.2. Fremgangsmåten ifølge krav 1, videre omfattende trinnet med posisjonering av en tredje plate (140) som et mellomstykke mellom den første og den andre platen før trinn b), og trinn b) også omfatter sveising gjennom den tredje platen (140).3. Fremgangsmåten ifølge krav 1 eller 2, idet platene omfatter metaller valgt fra gruppen jernholdige materialer, nikkellegeringer og kobberlegeringer, og gruppen omfattende titan og zirkonium.4. Fremgangsmåten ifølge krav 1, idet gjennomsveisingen er utført med en effekt på 4 – 30 kW.5. Fremgangsmåten ifølge krav 1 – 4, idet den første og andre platen er sveiset innenfor periferien av den andre platen.6. Fremgangsmåten ifølge krav 5, idet den første og andre platen er sveiset innenfor periferien av den andre platen ved bruk av et mønster fra gruppen omfattende lukkede geometriske mønstre så som rektangulære mønstre, heksagonale mønstre, og åpne geometriske mønstre slik som punkter, spiraler og meandre.7. Fremgangsmåten ifølge krav 1 – 6, idet den første og andre platen er sveiset langs periferien av den andre platen.8. Fremgangsmåten ifølge krav 1 – 7, idet den andre platen (120) omfatter et flertall tilliggende plater, idet de tilliggende platene er festet sammen og er sveiset til den første platen i én operasjon.9. Fremgangsmåten ifølge krav 1 – 8, idet påfølgende plater er sveiset i henhold til fremgangsmåten ifølge krav 1 – 8, på plater som er sveiset i henhold til fremgangsmåten ifølge krav 1 – 8.10. Fremgangsmåten ifølge krav 1 – 8, idet påfølgende plater er sveiset på en motsatt side av den sveisede sammenstillingen (100).11. Bruk av en fremgangsmåte ifølge krav 1 – 10 for styrking av en eksisterende plate (110) ved å sveise inn en forsterkende plate (120).
Drawings

Priority

No priority

Patent classes

IPC classesB23K 26/20B23K 26/22B23K 26/244B23K 26/322CPC classesB23K 26/206B23K 26/22B23K 26/244B23K 26/322

Citations

US 2018/043472 A1 (A1)WO 2017/124216 A1 (A1)US 2017/106470 A1 (A1)EP 1118420 A (A)WO 2010/084665 A1 (A1)

Applicants, owners and inventors

Owners
CRACON AS
Skolevegen 3 8642 FINNEIDFJORD NO (HEMNES Municipality, Nordland county)Org. number: 999054242Inventors
Karl Bernhard Opstad
Skolevegen 3 8642 FINNEIDFJORD NO (HEMNES Municipality, Nordland county)

Agent

ACAPO AS
ACAPO AS

Org. number: 915113737

Name and address are automatically synchronized with the Brønnøysund Register Centre.

Open in The Brønnøysund Register Centre
Edvard Griegs vei 1 5059 BERGEN NO (BERGEN Municipality, Vestland county)
Org. number: 915113737
Reference: P19622NO00

Status history

Payment history

Oppositions and appeals

Appeal to Board of AppealsReceived: 12.07.2023 NIPO's case No.: 2023/00289Board of appeal casenumber: 23/00106Current status: Avgjort. Fastholdt Patentstyrets avgjørelse
RequestorACAPO AS
ACAPO AS

Org. number: 915113737

Name and address are automatically synchronized with the Brønnøysund Register Centre.

Open in The Brønnøysund Register Centre
 Edvard Griegs vei 1 5059 BERGEN NO
InnsigelseReceived: 27.10.2021 NIPO's case No.: 2021/00460Current status: Avgjort. Høyere instans har opphevet patentet/registreringen
OpponentHelgeland V&M AS Postboks 413 8800 SANDNESSJØEN NO
Opponent's agentBRYN AARFLOT AS Stortingsgata 8 0161 OSLO NO (OSLO Municipality, Oslo county)
Org. number: 979993269Reference: 138972/FMA/HBH
InnsigelseReceived: 12.02.2021 NIPO's case No.: 2021/00065Current status: Under behandling. Brevveksling/utgående brev i saken
OpponentHelgeland V&M AS Postboks 413 8800 SANDNESSJØEN NO
Opponent's agentADVOKATFIRMAET HAAVIND AS Postboks 359 Sentrum 0101 OSLO NO (OSLO Municipality, Oslo county)
Org. number: 986420177Reference: Vebjørn Krag Iversen

Administrative limitation

No administrative limitation

Liens and licences

No liens or licenses registered

Gazette entries

No Gazette entries foundOnly events from 2024.03.04 and onwards are shown.