DK143321B - PROCEDURE AND APPARATUS FOR PREVENTING DEFORMATION AND REDUCTION BY THE END PARTIES OF WELDING - Google Patents
PROCEDURE AND APPARATUS FOR PREVENTING DEFORMATION AND REDUCTION BY THE END PARTIES OF WELDING Download PDFInfo
- Publication number
- DK143321B DK143321B DK446472A DK446472A DK143321B DK 143321 B DK143321 B DK 143321B DK 446472 A DK446472 A DK 446472A DK 446472 A DK446472 A DK 446472A DK 143321 B DK143321 B DK 143321B
- Authority
- DK
- Denmark
- Prior art keywords
- welding
- plates
- cracking
- procedure
- reduction
- Prior art date
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0408—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work for planar work
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Joining Of Building Structures In Genera (AREA)
- Body Structure For Vehicles (AREA)
Description
|j| (12) FREMLÆGGELSESSKRIFT mi 143321 B| J | (12) PUBLICATION MANUAL mi 143321 B
(19) DANMARK(19) DENMARK
DIREKTORATET FOR PATENT- OG VAREMÆRKEVÆSENETDIRECTORATE OF THE PATENT AND TRADEMARKET SYSTEM
(21) Ansøgning nr. 4464/72 (51) IntCI.3 B 23 K 9/02 (22) Indieveringsdag 8. sep. 1972 // B 23 K 37/04 (24) Løbedag 8. sep. 1972 (41) Aim. tilgængelig 11 . mar. 1973 (44) Fremlagt 10. aug. 1981 (86) International ansøgning nr. -(86) International indleveringsdag -(85) Videreførelsesdag -(62) Stamansøgning nr. -(21) Application No. 4464/72 (51) IntCI.3 B 23 K 9/02 (22) Filing Day Sep 8 1972 // B 23 K 37/04 (24) Race day Sep 8 1972 (41) Aim. available 11. March 1973 (44) Presented 10 Aug. 1981 (86) International Application No. - (86) International Filing Day - (85) Continuation Day - (62) Master Application No. -
(30) Prioritet 1O. sep. 1971 i 70574/71, JP(30) Priority 1O. September 1971 in 70574/71, JP
(71) Ansøger KAWASAKI JUKOGYD KABUSHIKI KAIS HA, Kobe-Shi, JP.(71) Applicant KAWASAKI JUKOGYD KABUSHIKI KAIS HA, Kobe-Shi, JP.
(72) Opfinder Kiyoshi Terai, JP: YUzuru Fujita, JP.(72) Inventor Kiyoshi Terai, JP: YUzuru Fujita, JP.
(74) Fuldmægtig internationalt Patent-Bureau.(74) International Patent Bureau.
(54) Fremgangsmåde og anordning til at forhindre deformation og revnedan= nelse ved endepartierne af en svejsning.(54) Method and apparatus for preventing deformation and cracking at the end portions of a weld.
Opfindelsen angår en fremgangsmåde til at forhindre deformation og revnedannelse ved endepartierne af en svejsning under énsidig automatisk svejsning af en fuge mellem to plader, der ligger an mod hinanden i samme plan.The invention relates to a method for preventing deformation and cracking at the end portions of a weld during unilateral automatic welding of a joint between two plates abutting one another in the same plane.
I den senere tid er det blevet mere og mere almindeligt at anvende en automatisk, énsidig svejseproces til samling af plader ved konstruktion af skibsskrog og ΐη dette har givet et stærkt bidrag til automatisering af svejsningen. Bn sådan svejse- t— proces har imidlertid den ulempe, at der kan opstå revnedannelser ved enderne af ^ svejsesømmen og udbedringen af sådanne revnedannelser er forbundet med store omkosten ninger og yderst vanskelig, og det er stærkt påtrængt at finde en løsning på dette problem.In recent times, it has become more and more common to use an automatic, one-sided welding process to assemble plates by ship hull construction and detteη this has made a strong contribution to the automation of welding. However, such a welding process has the disadvantage that cracking can occur at the ends of the welding seam and the repair of such cracking is associated with high costs and extremely difficult, and a solution to this problem is urgently needed.
Der kendes i hovedsagen to metoder til at forhindre sådanne revnedannelser ved ^ enderne af svejsesømme i at forekomme. Den ene metode går ud på over en strækning på 500-1000 mm fra enden af svejsesømmen at foretage en forudgående svejsning, 2 143321 jfr. fig. 4.There are generally two methods known to prevent such cracking at the ends of weld seams from occurring. One method involves making a prior welding, 2 143321, over a distance of 500-1000 mm from the end of the weld seam. FIG. 4th
Den anden metode går ud på at standse svejsningen ved midten af svejselinien, hvorefter svejsningen genoptages og færdiggøres fra den modsatte ende af svejselinien, jfr. fig. 5.The second method is to stop the welding at the center of the welding line, after which the welding is resumed and completed from the opposite end of the welding line, cf. FIG. 5th
Disse metoder kræver imidlertid, at udbedringen af en lokaliseret fejl foretages på et sted, hvor en gennemgående svejsesøm ikke kan tilvejebringes på bagsiden af pladen, eller at svejsningen i en retning afbrydes og efterfølges af en svejsning i modsat retning. Det vil ses, at en automatisk, ensidig svejseproces ville være fordelagtig, såfremt det ikke var nødvendigt at foretage vending af pladerne, og hvis der kunne anvendes en kontinuerlig svejseproces. Behov for yderligere svejsearbejde til udbedring af svejsesømmen eller standsningen af svejseprocessen medfører en væsentlig forringelse af fordelene ved den automatiske, ensidige svejsemetode.However, these methods require that the repair of a localized defect be made at a location where a continuous weld seam cannot be provided on the back of the sheet or that the welding in one direction is interrupted and followed by a weld in the opposite direction. It will be seen that an automatic, one-sided welding process would be advantageous if it was not necessary to turn the plates and if a continuous welding process could be used. The need for additional welding work to improve the welding seam or stopping of the welding process results in a significant deterioration of the advantages of the automatic, one-sided welding method.
Til den kendte teknik hører også det princip, at de plader som skal svejses sammen, fastspændes til hinanden ved at de trykkes mod et underlag, jfr. beskrivelsen til østtysk patent nr. 38583, eller holdes i rigtig udgangsstilling i forhold til hinanden ved at der påsvejses et øre med hul på hver plade, hvorefter en holdebro fæstnes til ørerne ved hjælp af kiler, som drives ind i hullerne, jfr. beskrivelsen til US-patentskrift 3.182.988.The prior art also includes the principle that the plates to be welded together are clamped to each other by being pressed against a substrate, cf. the description of East German Patent No. 38583, or held in proper starting position relative to each other by welding an ear with a hole on each plate, after which a holding bridge is attached to the ears by wedges driven into the holes, cf. U.S. Patent No. 3,182,988.
Fra beskrivelsen til britisk patentskrift nr. 1237085 er det desuden kendt at fastholde plader for svejsning ved hjælp af magneter.Further, from the specification to British Patent Specification No. 1237085, it is known to retain plates for welding by means of magnets.
En fastholdelse, som opnås ved statisk fastspanding før svejsningen begynder, har vist sig at være utilstrækkelig til at undgå deformation og revnedannelse. Deformation og revnedannelse skyldes et samspil mellem kræfter, som opstår på grund af den høje temperatur, smeltning og størkning, og disse kræfter modvirkes ikke i tilstrækkelig grad ved statisk fastholdelse.Retaining achieved by static clamping before welding begins has been found to be insufficient to avoid deformation and cracking. Deformation and cracking are due to an interaction between forces that occur due to the high temperature, melting and solidification, and these forces are not sufficiently counteracted by static retention.
Undersøgelser har vist, at revner af den ovenfor nævnte art dannes ved eks-tremthøj temperatur, hvilket kan udledes fra tidspunktet for revnedannelsens begyndelse og tilstanden i brudfladerne. På grundlag af en sådan undersøgelse af revnedannelsen er fremgangsmåden i henhold til opfindelsen blevet udviklet for at muliggøre en ensidig, automatisk svejseproces, hvorved deformation og revnedannelse forhindres, og der opnås et frardigt produkt af høj kvalitet, uden at der behøves nogen afsluttende reparation efter svejsning. Den foreliggende opfindelse er baseret på detforhold, at svejsezonen har meget lille evne til elastisk deformation umiddelbart før størkning. Opfindelsens fremgangsmåde beror således på disse betragtninger og forhindrer deformation og revnedannelse i endeområderne af svejsesømmen, og denne fremgangsmåde ifølge opfindelsen er ejendommelig ved, at pladerne udsættes for en ydre kraft i deres plan ved deres endepartier for under udførelse af endepartierne af nævnte svejsning at holde pladerne trykket mod hinanden, hvilken kraft udøves enten mod fremspring, som er fæstnet til og rager ud fra 143321 3 endekanten af hver plade eller direkte mod pladerne i deres sidekanter, der vender bort fra svejsningen.Studies have shown that cracks of the kind mentioned above are formed at extremely high temperatures, which can be deduced from the time of the crack formation and the state of the fracture surfaces. On the basis of such a cracking study, the process of the invention has been developed to enable a unilateral, automatic welding process, thereby preventing deformation and cracking, and obtaining a high quality finished product without the need for any final repair after welding. . The present invention is based on the fact that the welding zone has very little ability for elastic deformation immediately prior to solidification. Thus, the method of the invention is based on these considerations and prevents deformation and cracking in the end regions of the weld seam, and this method according to the invention is characterized in that the plates are subjected to an external force in their plane at their end portions to hold the plates during the execution of the end portions of said weld. the pressure against each other, which force is exerted either on projections attached to and protruding from the end edge of each plate or directly against the plates at their side edges facing away from the weld.
En anordning til udførelse af fremgangsmåden ifølge opfindelsen, og hvor pladerne har fremspring ved endekanterne, er ejendommelig ved, at den omfatter et U-formet organ med trykorganer indrettede til ved enderne af U'ets grene at udøve tryk mod fremspringene.A device for carrying out the method according to the invention, in which the plates have projections at the end edges, is characterized in that it comprises a U-shaped means with pressure means arranged to exert pressure on the projections at the ends of the U's branches.
Opfindelsen forklares nærmere i det følgende under henvisning til den skematiske tegning, hvor fig. 1 viser set ovenfra et apparat til udøvelse af fremgangsmåden ifølge opfindelsen, fig. 2 en anden udførelsesform for apparatet ifølge opfindelsen, fig. 3 endnu en udførelsesform for apparatet ifølge opfindelsen, fig. 4a og 4b set henholdsvis ovenfra og fra ende, illustrerer en kendt metode til forhindring af revnedannelser, og fig. 5 illustrerer en anden kendt metode til forhindring af revnedannelser ved en automatisk, énsidig svejsemetode.The invention is explained in more detail below with reference to the schematic drawing, in which fig. 1 is a plan view of an apparatus for carrying out the method according to the invention; FIG. 2 shows another embodiment of the apparatus according to the invention; FIG. 3 shows yet another embodiment of the apparatus according to the invention; FIG. 4a and 4b, respectively, seen from above and from the end illustrate a known method for preventing cracking, and fig. 5 illustrates another known method for preventing cracking by an automatic one-sided welding method.
Fig. 1 viser et U-formet organ 2, hvis ben er lagt an mod sidefladerne af stålplader 1, der skal svejses sammen kant mod kant. Et par holdere 3 er fastgjort til pladernes sideflader på hver sin side af svejselinien og et par mekaniske organer eller hydrauliske cylindre 4 er indsat mellem det U-formede organ 2's ben og fortrinsvis båret af holderne 3, hvilke cylindre tjener, når de aktiveres, til at frembringe en kraft, der presser pladernes endekanter mod hinanden med henblik på at undertrykke deformationerne og forhindre revnedannelser under sammensvejsningen af pladerne, specielt ved enderne af svejselinien.FIG. 1 shows a U-shaped member 2, the legs of which are laid against the side surfaces of steel plates 1, which are to be welded together edge to edge. A pair of holders 3 are attached to the side surfaces of the plates on either side of the welding line and a pair of mechanical means or hydraulic cylinders 4 are inserted between the legs of the U-shaped member 2 and preferably supported by the holders 3, which cylinders serve when activated. generating a force pressing the end edges of the plates together to suppress the deformations and prevent cracking during the welding of the plates, especially at the ends of the welding line.
Fig. 2 viser et par trykudøvende organer 5 beliggende langs yderkanterne af plader 1, der er i anlæg mod hinanden kant mod kant. Et par mekaniske organer eller hydrauliske cylindre 4' er fastgjort til en ramme 6 og presser pladerne l’s kanter mod hinanden med henblik på at forhindre deformationerne og revnedannelserne i nærheden af svejseliniens ender i at opstå.FIG. 2 shows a pair of pressure exerting means 5 located along the outer edges of plates 1 abutting against each other edge to edge. A pair of mechanical means or hydraulic cylinders 4 'are attached to a frame 6 and press the edges of the plates 1 to prevent the deformations and cracking near the ends of the welding line from occurring.
Fig. 3 viser en opstilling, hvor et par symmetriske, L-formede trykudøvende organer 7 anbringes med et ben beliggende oven over et par plader 1 af samme art som omtalt under henvisning til fig. 1 og 2. Et par trykudøvende mekaniske organer eller hydrauliske cylindre 4” er fastgjort til de nævnte L-formede organer og udøver tryk på pladernes endeområder med henblik på at undertrykke deformationer og forhindre revnedannelser i at opstå under pladernes sammensvejsning.FIG. 3 shows an arrangement in which a pair of symmetrical L-shaped pressurizing members 7 are arranged with a leg located above a pair of plates 1 of the same kind as discussed with reference to FIG. 1 and 2. A pair of pressure-acting mechanical members or hydraulic cylinders 4 ”are attached to the L-shaped members and exert pressure on the end regions of the plates to suppress deformations and prevent cracking from occurring during plate welding.
Ved at tvinge de stålplader, der skal svejses sammen, til at have en bestemt, fast position under udøvelse af udefra kommende tryk, undertrykkes den mindste deformation, der kunne forårsage revnedannelser, hvorved man undgår at skulle anvende de ved den kendte teknik sædvanlige, automatiske anlæg til ’’ensidig" svejsning og afhjælper ulemperne ved disse anlæg. Derfor forøges produktiviteten ved svejsemetoden 1-By forcing the steel sheets to be welded together to have a certain fixed position while externally exerted pressure suppresses the slightest deformation that could cause cracking, avoiding the use of the conventional, automatic systems for "one-sided" welding and alleviate the disadvantages of these systems. Therefore, the productivity of the welding method 1-
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7057471 | 1971-09-10 | ||
JP7057471A JPS531215B2 (en) | 1971-09-10 | 1971-09-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
DK143321B true DK143321B (en) | 1981-08-10 |
DK143321C DK143321C (en) | 1981-12-14 |
Family
ID=13435443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK446472A DK143321C (en) | 1971-09-10 | 1972-09-08 | PROCEDURE AND APPARATUS FOR PREVENTING DEFORMATION AND REVENUE AT THE END PARTIES OF WELDING |
Country Status (19)
Country | Link |
---|---|
JP (1) | JPS531215B2 (en) |
AR (1) | AR206677A1 (en) |
AU (1) | AU476212B2 (en) |
BE (1) | BE788176A (en) |
BR (1) | BR7206206D0 (en) |
CA (1) | CA989212A (en) |
DD (1) | DD97372A5 (en) |
DE (1) | DE2241579A1 (en) |
DK (1) | DK143321C (en) |
ES (1) | ES406803A1 (en) |
FR (1) | FR2152812B1 (en) |
GB (1) | GB1404200A (en) |
IT (1) | IT965272B (en) |
NL (1) | NL7212281A (en) |
NO (1) | NO138195C (en) |
PL (1) | PL83505B1 (en) |
RO (1) | RO60665A (en) |
SE (1) | SE379299B (en) |
SU (1) | SU655291A3 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5354512Y2 (en) * | 1974-05-20 | 1978-12-27 | ||
JPS5915974U (en) * | 1982-07-21 | 1984-01-31 | 美和電気株式会社 | Current or voltage waveform analyzer |
DE3814186A1 (en) * | 1988-04-27 | 1989-11-09 | Winkelmann & Pannhoff Gmbh | Method for the production of delivery and/or guiding devices for hydrodynamic machines and a radial rotor, especially a coolant pump impeller for internal combustion engines, produced by this method |
-
1971
- 1971-09-09 RO RO7218071A patent/RO60665A/ro unknown
- 1971-09-10 JP JP7057471A patent/JPS531215B2/ja not_active Expired
-
1972
- 1972-01-01 AR AR24396472A patent/AR206677A1/en active
- 1972-08-22 AU AU45842/72A patent/AU476212B2/en not_active Expired
- 1972-08-22 CA CA150,278A patent/CA989212A/en not_active Expired
- 1972-08-24 DE DE19722241579 patent/DE2241579A1/en active Pending
- 1972-08-24 GB GB3958572A patent/GB1404200A/en not_active Expired
- 1972-08-30 BE BE788176A patent/BE788176A/en unknown
- 1972-09-06 BR BR620672A patent/BR7206206D0/en unknown
- 1972-09-07 NO NO317672A patent/NO138195C/en unknown
- 1972-09-07 PL PL15763372A patent/PL83505B1/xx unknown
- 1972-09-08 DK DK446472A patent/DK143321C/en active
- 1972-09-08 IT IT5262972A patent/IT965272B/en active
- 1972-09-08 NL NL7212281A patent/NL7212281A/xx not_active Application Discontinuation
- 1972-09-08 DD DD16555172A patent/DD97372A5/xx unknown
- 1972-09-08 SU SU721825897A patent/SU655291A3/en active
- 1972-09-08 FR FR7232001A patent/FR2152812B1/fr not_active Expired
- 1972-09-08 SE SE1162972A patent/SE379299B/xx unknown
- 1972-09-09 ES ES406803A patent/ES406803A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA989212A (en) | 1976-05-18 |
SU655291A3 (en) | 1979-03-30 |
GB1404200A (en) | 1975-08-28 |
PL83505B1 (en) | 1975-12-31 |
BE788176A (en) | 1972-12-18 |
DK143321C (en) | 1981-12-14 |
BR7206206D0 (en) | 1973-08-21 |
DE2241579A1 (en) | 1973-03-29 |
FR2152812B1 (en) | 1975-01-03 |
DD97372A5 (en) | 1973-05-05 |
JPS4836042A (en) | 1973-05-28 |
NO138195C (en) | 1978-07-26 |
AU476212B2 (en) | 1976-09-16 |
AU4584272A (en) | 1974-02-28 |
NO138195B (en) | 1978-04-17 |
NL7212281A (en) | 1973-03-13 |
AR206677A1 (en) | 1976-08-13 |
ES406803A1 (en) | 1976-02-16 |
JPS531215B2 (en) | 1978-01-17 |
RO60665A (en) | 1976-11-15 |
SE379299B (en) | 1975-10-06 |
FR2152812A1 (en) | 1973-04-27 |
IT965272B (en) | 1974-01-31 |
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