DE4408518A1 - Sealed spot welded sheet joint prodn. - Google Patents
Sealed spot welded sheet joint prodn.Info
- Publication number
- DE4408518A1 DE4408518A1 DE19944408518 DE4408518A DE4408518A1 DE 4408518 A1 DE4408518 A1 DE 4408518A1 DE 19944408518 DE19944408518 DE 19944408518 DE 4408518 A DE4408518 A DE 4408518A DE 4408518 A1 DE4408518 A1 DE 4408518A1
- Authority
- DE
- Germany
- Prior art keywords
- prodn
- dispersion
- spot welded
- welding
- welded sheet
- 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.)
- Granted
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
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0615—Macromolecular organic compounds, e.g. prepolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09K2200/0625—Polyacrylic esters or derivatives thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Herstellen einer gas- und flüssigkeitsdichten punktgeschweißten Blechver bindung, wobei auf zumindest eines der miteinander zu ver bindenden Blechteile im Überlappungsbereich ein Dichtmate rial aufgetragen wird und dann die Punktschweißung durch geführt wird. Bei der Herstellung gas- und flüssigkeits dichter Verbindungen von Stahlblechteilen, wie elektri sches Widerstandsschweißen, zum Beispiel nach dem Buckel verfahren entsprechend DIN 1910, Teil 5, werden bestimmte Anforderungen an die Dichtheit im Verbindungsbereich ge genüber gasförmigen und/oder flüssigen Medien gestellt. In der Praxis werden pastöse oder dauerelastische Dichtstoffe im Überlappungsbereich auf eines der Bleche raupenförmig aufgetragen. Das Auftragen muß mit großer Sorgfalt erfol gen, damit der Schweißbereich metallisch blank bleibt. Bei der dann folgenden Handhabung der mit der Raupe versehenen Blechteile muß darauf geachtet werden, daß die aufgetrage ne Raupe nicht verwischt und das Dichtmaterial insbesonde re nicht auf den Schweißbereich gelangt, weil dann der Schweißvorgang entweder vollständig verhindert wird oder die Verbindung mangelhaft und unzuverlässig wird. Hinzu kommt, daß die Raupe in Abhängigkeit von den Eigenschaften des pastösen bzw. dauerelastischen Dichtmaterials sehr ex akt dimensioniert werden muß.The invention relates to a method for producing a gas and liquid-tight spot welded sheet metal bond, with at least one of the ver binding sheet metal parts in the overlap area a sealing mat rial is applied and then spot welding to be led. In the production of gas and liquid tight connections of sheet steel parts, such as electri resistance welding, for example after the hump procedures in accordance with DIN 1910, Part 5, are determined Tightness requirements in the connection area compared to gaseous and / or liquid media. In In practice, pasty or permanently elastic sealants are used caterpillar-shaped in the overlap area on one of the sheets applied. The application must be done with great care enough to keep the welding area shiny metallic. At the subsequent handling of the caterpillar Sheet metal parts must be ensured that the applied ne caterpillar not blurred and the sealing material in particular re not reaching the welding area because then the Welding process is either completely prevented or the connection becomes poor and unreliable. In addition comes that the caterpillar depends on the properties the pasty or permanently elastic sealing material very ex must be dimensioned.
Aufgabe der Erfindung ist, ein Verfahren der eingangs be schriebenen Gattung so zu verbessern, daß auf einfache Weise eine zuverlässige abgedichtete Blechverbindung er reicht wird. Diese Aufgabe wird dadurch gelöst, daß auf den Überlappungsbereich eine wäßrige Dispersion eines un ter der Wärmeeinwirkung beim Punktschweißen aufschäumenden Kunststoffes aufgetragen wird. Vorzugsweise soll eine wäßrige Dispersion einer Acrylschaum-Farbe aufgetragen werden. Bedingt durch die relativ niedrige Reaktionswärme, die zum Aufschäumen der Acrylschaum-Farbe notwendig ist, reicht die beim Schweißen entstehende Prozeßwärme aus, um die Reaktion, d. h. das Aufschäumen auszulösen. Beim Auf schäumen füllt die Acrylschaum-Farbe durch die dabei auf tretende Volumenvergrößerung auch Spalten aus. Nach dem Abkühlen erhält man eine elastische und dichte Struktur, die allen Anforderungen genügt.The object of the invention is to be a method of the beginning to improve the genre so that it is simple Way he a reliable sealed sheet metal connection is enough. This object is achieved in that the overlap area an aqueous dispersion of an un ter of the heat effect during spot welding foaming Plastic is applied. Preferably one aqueous dispersion of an acrylic foam paint applied become. Due to the relatively low heat of reaction, which is necessary for foaming the acrylic foam color, the process heat generated during welding is sufficient to the reaction, d. H. trigger the foaming. When opening foaming fills up the acrylic foam color with it occurring volume increase also columns. After this Cooling, you get an elastic and dense structure, that meets all requirements.
Die Dispersion kann auch in Form einer flachen Raupe auf getragen werden, wobei wegen der beim Schweißen auftreten den Volumenvergrößerung nur eine geringe Raupenhöhe erfor derlich ist, die den Schweißvorgang selbst nicht behin dert. Im allgemeinen trocknet die im Überlappungsbereich aufgetragene Dispersion sehr schnell aus, so daß bei wei terer Handhabung der Blechteile ein Verschmieren nicht be fürchtet zu werden braucht. Im Einzelfall kann die aufge tragene Dispersion vor dem Punktschweißen aber auch zu sätzlich getrocknet werden.The dispersion can also take the form of a flat bead to be worn, due to occur during welding the volume increase requires only a small caterpillar height is that does not hamper the welding process itself different. Generally it dries in the overlap area applied dispersion very quickly, so that with white Do not smear after handling the sheet metal parts needs to be feared. In individual cases, the can added dispersion before spot welding are also dried.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19944408518 DE4408518B4 (en) | 1994-03-14 | 1994-03-14 | Process for producing a gas and liquid-tight spot-welded sheet metal connection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19944408518 DE4408518B4 (en) | 1994-03-14 | 1994-03-14 | Process for producing a gas and liquid-tight spot-welded sheet metal connection |
Publications (2)
Publication Number | Publication Date |
---|---|
DE4408518A1 true DE4408518A1 (en) | 1995-09-21 |
DE4408518B4 DE4408518B4 (en) | 2004-11-18 |
Family
ID=6512691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19944408518 Expired - Fee Related DE4408518B4 (en) | 1994-03-14 | 1994-03-14 | Process for producing a gas and liquid-tight spot-welded sheet metal connection |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4408518B4 (en) |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU260761A1 (en) * | М. Г. Хризман | CONTACT WELDING | ||
DE1186649B (en) * | 1963-05-17 | 1965-02-04 | Revertex Ltd | Sound dampening pad that can be melted onto metallic objects, in particular sheet metal |
US4122325A (en) * | 1977-01-21 | 1978-10-24 | Orrville Products, Inc. | Method of joining two sheet metal parts |
SU1073275A1 (en) * | 1982-05-26 | 1984-02-15 | Харьковский Ордена Ленина Авиационный Институт Им.Н.Е.Жуковского | Method of sealing-away welded joints |
DE3426770A1 (en) * | 1983-07-18 | 1985-01-31 | W.R. Grace & Co., New York, N.Y. | WELDABLE SEALING MEASURES FOR METALS AND METHOD FOR THEIR APPLICATION |
DE3130473C2 (en) * | 1981-07-23 | 1988-06-23 | Mayser-Gmbh & Co, 7900 Ulm, De | |
EP0345855A1 (en) * | 1988-05-26 | 1989-12-13 | Schreiner Luchtvaart Groep B.V. | Process for adhering materials together |
DE3832470C2 (en) * | 1987-09-25 | 1990-03-15 | Kansai Paint Co., Ltd., Amagasaki, Hyogo, Jp | |
DE3836012A1 (en) * | 1988-10-21 | 1990-04-26 | Roehr & Stolberg Gmbh | PLATE- AND TAPE-SHAPED LEAD SHEETS COATED WITH A CORROSION PROTECTIVE LAYER |
DE3932546A1 (en) * | 1988-11-14 | 1990-05-17 | Fortschritt Veb K | ADHESIVE FILM WITH STORED METAL GRID FOR COMBINED WELD-ADHESIVE CONNECTIONS |
GB2226566A (en) * | 1988-12-12 | 1990-07-04 | Croda Applic Chemicals Limited | Coating composition for use in automotive sealing process |
DE4034725A1 (en) * | 1990-10-31 | 1992-05-07 | Teroson Gmbh | Non-PVC plastisol compsn. as e.g. automobile sealant - contains emulsion copolymer of styrene] cpd. and (meth)acrylic] and-or itaconic acid, with plasticiser and inorganic fillers |
DE4124560A1 (en) * | 1991-07-24 | 1993-01-28 | Wacker Chemie Gmbh | COATING AGENTS FOR THE PRODUCTION OF WATERPROOF, VAPOR-PERMEABLE AND FLAME-RETARDANT COATINGS |
DE3815069C2 (en) * | 1988-05-04 | 1994-01-05 | Dornier Gmbh | Process for producing a corrosion-resistant connection of metallic components, in particular of aluminum, for the cell of aircraft or space vehicles by spot welding |
-
1994
- 1994-03-14 DE DE19944408518 patent/DE4408518B4/en not_active Expired - Fee Related
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU260761A1 (en) * | М. Г. Хризман | CONTACT WELDING | ||
SU241566A1 (en) * | И. Т. Козлов | |||
DE1186649B (en) * | 1963-05-17 | 1965-02-04 | Revertex Ltd | Sound dampening pad that can be melted onto metallic objects, in particular sheet metal |
US4122325A (en) * | 1977-01-21 | 1978-10-24 | Orrville Products, Inc. | Method of joining two sheet metal parts |
DE3130473C2 (en) * | 1981-07-23 | 1988-06-23 | Mayser-Gmbh & Co, 7900 Ulm, De | |
SU1073275A1 (en) * | 1982-05-26 | 1984-02-15 | Харьковский Ордена Ленина Авиационный Институт Им.Н.Е.Жуковского | Method of sealing-away welded joints |
DE3426770A1 (en) * | 1983-07-18 | 1985-01-31 | W.R. Grace & Co., New York, N.Y. | WELDABLE SEALING MEASURES FOR METALS AND METHOD FOR THEIR APPLICATION |
DE3832470C2 (en) * | 1987-09-25 | 1990-03-15 | Kansai Paint Co., Ltd., Amagasaki, Hyogo, Jp | |
DE3815069C2 (en) * | 1988-05-04 | 1994-01-05 | Dornier Gmbh | Process for producing a corrosion-resistant connection of metallic components, in particular of aluminum, for the cell of aircraft or space vehicles by spot welding |
EP0345855A1 (en) * | 1988-05-26 | 1989-12-13 | Schreiner Luchtvaart Groep B.V. | Process for adhering materials together |
DE3836012A1 (en) * | 1988-10-21 | 1990-04-26 | Roehr & Stolberg Gmbh | PLATE- AND TAPE-SHAPED LEAD SHEETS COATED WITH A CORROSION PROTECTIVE LAYER |
DE3932546A1 (en) * | 1988-11-14 | 1990-05-17 | Fortschritt Veb K | ADHESIVE FILM WITH STORED METAL GRID FOR COMBINED WELD-ADHESIVE CONNECTIONS |
GB2226566A (en) * | 1988-12-12 | 1990-07-04 | Croda Applic Chemicals Limited | Coating composition for use in automotive sealing process |
DE4034725A1 (en) * | 1990-10-31 | 1992-05-07 | Teroson Gmbh | Non-PVC plastisol compsn. as e.g. automobile sealant - contains emulsion copolymer of styrene] cpd. and (meth)acrylic] and-or itaconic acid, with plasticiser and inorganic fillers |
DE4124560A1 (en) * | 1991-07-24 | 1993-01-28 | Wacker Chemie Gmbh | COATING AGENTS FOR THE PRODUCTION OF WATERPROOF, VAPOR-PERMEABLE AND FLAME-RETARDANT COATINGS |
Non-Patent Citations (1)
Title |
---|
JP 2-227474 A., In: Patents Abstracts of Japan, C-782, Nov. 28, 1990, Vol. 14, No. 539 * |
Also Published As
Publication number | Publication date |
---|---|
DE4408518B4 (en) | 2004-11-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8110 | Request for examination paragraph 44 | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |