CN109366035B - Resistance spot welding connection structure for steel-aluminum dissimilar materials - Google Patents
Resistance spot welding connection structure for steel-aluminum dissimilar materials Download PDFInfo
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- CN109366035B CN109366035B CN201811549663.3A CN201811549663A CN109366035B CN 109366035 B CN109366035 B CN 109366035B CN 201811549663 A CN201811549663 A CN 201811549663A CN 109366035 B CN109366035 B CN 109366035B
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- 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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
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- 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
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- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention discloses a steel-aluminum dissimilar material resistance spot welding connecting structure which comprises a steel module and an aluminum alloy connecting piece, wherein the steel module is provided with a sinking platform and is fixedly arranged on the aluminum alloy connecting piece; the aluminum alloy connecting piece is provided with a through hole, and the sinking platform is arranged in the through hole in a penetrating mode. The resistance spot welding connection structure for the steel-aluminum dissimilar materials provided by the invention realizes the manufacture of steel-aluminum mixed parts on the traditional steel vehicle body production line, and the additional investment of SPR (surface plasma resonance) and FDS (fully drawn Standard) riveting equipment and the transformation of corresponding production lines is not needed, so that the production cost is saved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a resistance spot welding connecting structure for steel-aluminum dissimilar materials.
Background
With the increasing severity of energy crisis and environmental protection problems in the world, the requirements of energy conservation and emission reduction of automobiles in various countries are becoming more stringent, and aluminum alloy is increasingly favored as one of the key lightweight materials in the automobile industry. The density of the aluminum alloy is only 1/3 of steel, and the weight reduction of the aluminum alloy replacing steel materials can be realized by more than 35% on the premise of realizing the same performance. Therefore, automobile enterprises have increased the research on the application technology of aluminum alloy on automobiles, and also have parts and automobile bodies/products using aluminum alloy materials on the market.
At the present stage, because the cost of the aluminum alloy material is much higher than that of steel and the performance of the aluminum alloy material is inferior to that of the steel, the application of a large amount of aluminum alloy material can bring about larger cost pressure. In view of this, in the automobile industry, many design studies on parts or bodies of steel-aluminum hybrid schemes are turned to, for example, the parts or bodies of automobiles are made of different materials of steel and aluminum. The steel-aluminum alloy is formed by combining steel and aluminum alloy materials, and the steel and the aluminum alloy are connected by adopting Self-Piercing riveting (SPR for short) and spin-tapping riveting (FDS for short) processes. However, for automobile enterprises, the existing connection process system is still a resistance spot welding process at the steel body stage, and if a steel-aluminum hybrid scheme is adopted, SPR riveting equipment and FDS riveting equipment are required to replace the existing spot welding equipment, which means a large number of production line upgrades, even a proprietary steel-aluminum hybrid production line needs to be established, which brings great challenges and huge investment to the automobile enterprises at the present stage.
Disclosure of Invention
The invention aims to provide a resistance spot welding connection structure for steel-aluminum dissimilar materials, which solves the problems in the prior art, realizes the manufacture of steel-aluminum mixed parts on the traditional steel vehicle body production line, does not need to additionally input the transformation of SPR and FDS riveting equipment and corresponding production lines, and saves the production cost.
The invention provides a resistance spot welding connection structure for steel-aluminum dissimilar materials, which comprises the following components:
the steel module is provided with a sinking platform;
the steel module is fixedly arranged on the aluminum alloy connecting piece;
the aluminum alloy connecting piece is provided with a through hole, and the sinking platform is arranged in the through hole in a penetrating mode.
The resistance spot welding connection structure for the steel-aluminum dissimilar material is characterized in that the aluminum alloy connecting piece comprises a first connecting part and a second connecting part, and a set angle is formed between the first connecting part and the second connecting part;
the through hole is formed in the first connecting part;
the steel module is fixedly connected with the first connecting part.
The resistance spot welding connection structure for the steel-aluminum dissimilar material preferably further comprises a first structural adhesive layer, and the first structural adhesive layer is fixedly arranged between the steel module and the aluminum alloy connecting piece.
In the resistance spot welding connection structure of the steel-aluminum dissimilar material, preferably, the depth of the sinking platform is the sum of the thickness of the first connection part and the thickness of the first structure glue layer.
The resistance spot welding connection structure for the steel-aluminum dissimilar materials preferably further comprises a second structure adhesive layer, one surface of the second structure adhesive layer is fixedly arranged at the bottom of the first connection part, and the other surface of the second structure adhesive layer is fixedly connected with a vehicle body part.
The steel-aluminum dissimilar material resistance spot welding connection structure is characterized in that the thickness of the first structure glue layer is preferably 0.2 mm-1.0 mm;
the thickness of the second structure glue layer is 0.2 mm-0.5 mm.
In the resistance spot welding connection structure of the steel-aluminum dissimilar material, preferably, the number of the sinking platforms is two or more, and the minimum distance between the edges of two adjacent sinking platforms is 20mm to 100 mm.
In the resistance spot welding connection structure of the steel-aluminum dissimilar material, preferably, a gap is maintained between the sinking platform and the through hole, and the gap value is 0.2mm to 2.0 mm.
In the resistance spot welding connection structure of the steel-aluminum dissimilar material, preferably, the inner diameter of the sinking platform is 15mm to 25 mm.
In the resistance spot welding connection structure of the steel-aluminum dissimilar material, the thickness of the steel module is preferably 0.5 to 3.0 mm.
The resistance spot welding connection structure for the steel-aluminum dissimilar materials provided by the invention realizes the manufacture of steel-aluminum mixed parts on the traditional steel vehicle body production line, and the additional investment of SPR (surface plasma resonance) and FDS (fully drawn Standard) riveting equipment and the transformation of corresponding production lines is not needed, so that the production cost is saved.
Drawings
FIG. 1 is an exploded view of a steel-aluminum dissimilar material resistance spot welding connection structure provided by an embodiment of the invention;
FIG. 2 is a diagram of a resistance spot welding connection structure made of dissimilar materials of steel and aluminum according to an embodiment of the present invention in practical application;
FIG. 3 is an exploded view of FIG. 2;
FIG. 4 is a schematic structural view of an aluminum alloy connector;
FIG. 5 is a schematic structural view of a steel module;
FIG. 6 is a cross-sectional view at A-A of FIG. 2;
fig. 7 is an enlarged view at B in fig. 6.
The drawings illustrate in detail:
100-Steel Module 110-counter sink 200-aluminum alloy connector
210-first connection 211-through hole 220-second connection
300-first structural adhesive layer 400-vehicle body part 500-second structural adhesive layer
d 1-gap value d 2-minimum distance
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
Referring to fig. 1 to 7, an embodiment of the present invention provides a resistance spot welding connection structure (hereinafter referred to as a connection structure) made of steel and aluminum dissimilar materials, which includes a steel module 100 and an aluminum alloy connection member 200, wherein the steel module 100 is provided with a sinking platform 110, and the steel module 100 is fixedly disposed on the aluminum alloy connection member 200; the aluminum alloy connector 200 is provided with a through hole 211, and the sinking platform 110 is arranged in the through hole 211 in a penetrating way.
In the using process, the steel sinking platform 110 and the vehicle body part 400 can be fixed through a resistance spot welding process, so that the vehicle body adopting the connecting structure can be produced and manufactured through the resistance spot welding process of the traditional steel vehicle body production line, the additional increase of SPR and FDS riveting equipment and the transformation of the production line are not needed, and the huge investment is saved.
As shown in fig. 1, the aluminum alloy connector 200 may include a first connecting portion 210 and a second connecting portion 220, wherein a set angle is formed between the first connecting portion 210 and the second connecting portion 220; the through hole 211 is opened on the first connection portion 210; the steel module 100 is fixedly coupled to the first coupling portion 210. After the steel module 100 and the first connection portion 210 are connected to the vehicle body member 400, the connection to other members may be accomplished through the second connection portion 220.
Further, as shown in fig. 1, the connection structure further includes a first structural adhesive layer 300, and the first structural adhesive layer 300 is fixedly disposed between the steel module 100 and the aluminum alloy connector 200. Through setting up first structure glue film 300, can guarantee the joint strength between aluminum alloy connecting piece 200 and the steel module 100, electrochemical corrosion problem when having solved a material spare part of steel aluminium and connecting simultaneously.
In order to ensure the connection strength after the resistance welding, the depth of the sinking platform 110 may be the sum of the thickness of the first connection portion 210 and the thickness of the first structural adhesive layer 300.
Further, the connecting structure may further include a second structural adhesive layer 500, one surface of the second structural adhesive layer 500 is fixedly disposed at the bottom of the first connecting portion 210, and the other surface of the second structural adhesive layer 500 is used for being fixedly connected with the vehicle body part 400. Thereby, the connection strength between the steel module 100, the first connection portion 210, and the body member 400 can be ensured while avoiding the problem of galvanic corrosion when connecting steel-aluminum dissimilar materials.
Specifically, the thickness of the first structural adhesive layer 300 may be 0.2mm to 1.0 mm; the thickness of the second structural adhesive layer 500 may be 0.2mm to 0.5 mm. In the present embodiment, the thickness of the first structural adhesive layer 300 is preferably 1.0mm, and the thickness of the second structural adhesive layer 500 may be 0.3 mm.
Further, in order to improve the reliability of the connection structure with the vehicle body member 400, the number of the sinking platforms 110 may be two or more, and the minimum distance d2 between the edges of two adjacent sinking platforms 110 is 20mm to 100 mm. Preferably, in the present embodiment, as shown in fig. 5, the number of the sinkers 110 is three, and the minimum distance d2 between the edges of two adjacent sinkers 110 is 40 mm.
In order to avoid the aluminum alloy connecting member 200 being extruded or melted at high temperature during the spot welding process, the bottom of the sinking platform 110 is melted and expanded by the high temperature of the process when the resistance spot welding process is performed, and in this embodiment, as shown in fig. 6, a gap is maintained between the sinking platform 110 and the through hole 211, and the gap value d1 may be 0.2mm to 2.0mm, and preferably, the gap value d1 is 0.8 mm.
In order to facilitate the implementation of the resistance spot welding process, the inner diameter of the sinking platform 110 may be specifically 15mm to 25mm, and preferably, in the present embodiment, the inner diameter of the sinking platform 110 is 20 mm.
Specifically, the thickness value of the steel module 100 may be 0.5mm to 3.0mm, so as to ensure the overall structural strength of the connection structure; in this embodiment, it is preferable that the thickness value of the steel module 100 is 2.0 mm. The ratio of the thickness of the steel module 100 to the thickness of the vehicle body part 400 is required to satisfy 1/3-3.0, and preferably, the ratio of the thickness of the steel module 100 to the thickness of the vehicle body part 400 is 1.0-3.0.
The resistance spot welding connection structure for the steel-aluminum dissimilar materials provided by the embodiment of the invention realizes the manufacture of steel-aluminum mixed parts on the traditional steel vehicle body production line without additionally investing SPR and FDS riveting equipment and the transformation of corresponding production lines, and saves the production cost.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.
Claims (7)
1. The utility model provides a steel aluminium dissimilar material resistance spot welding connection structure which characterized in that includes:
the steel module is provided with a sinking platform;
the steel module is fixedly arranged on the aluminum alloy connecting piece;
the aluminum alloy connecting piece is provided with a through hole, and the sinking platform is arranged in the through hole in a penetrating manner;
the aluminum alloy connecting piece comprises a first connecting part and a second connecting part, and a set angle is formed between the first connecting part and the second connecting part;
the through hole is formed in the first connecting part;
the steel module is fixedly connected with the first connecting part;
the first structural adhesive layer is fixedly arranged between the steel module and the aluminum alloy connecting piece;
still include second structure glue film, the fixed setting of one side of second structure glue film is in the bottom of first connecting portion, the another side of second structure glue film is used for with automobile body part fixed connection.
2. The steel-aluminum dissimilar material resistance spot welding connection structure according to claim 1, wherein a depth of the sinking platform is a sum of a thickness of the first connection portion and a thickness of the first structure glue layer.
3. The steel-aluminum dissimilar material resistance spot welding connection structure according to claim 1, wherein the thickness of the first structural adhesive layer is 0.2mm to 1.0 mm;
the thickness of the second structure glue layer is 0.2 mm-0.5 mm.
4. The steel-aluminum dissimilar material resistance spot welding connection structure according to claim 1, wherein the number of the sinking tables is two or more, and a minimum distance between edges of adjacent two sinking tables is 20mm to 100 mm.
5. The steel-aluminum dissimilar material resistance spot welding connection structure according to claim 1, wherein a gap is maintained between the sinking platform and the through hole, and the gap value is 0.2mm to 2.0 mm.
6. The steel-aluminum dissimilar material resistance spot welding connection structure according to claim 1, wherein an inner diameter of the sinking platform is 15mm to 25 mm.
7. The steel-aluminum dissimilar material resistance spot welding connection structure according to claim 1, wherein the thickness value of the steel module is 0.5mm to 3.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811549663.3A CN109366035B (en) | 2018-12-18 | 2018-12-18 | Resistance spot welding connection structure for steel-aluminum dissimilar materials |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811549663.3A CN109366035B (en) | 2018-12-18 | 2018-12-18 | Resistance spot welding connection structure for steel-aluminum dissimilar materials |
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| CN109366035A CN109366035A (en) | 2019-02-22 |
| CN109366035B true CN109366035B (en) | 2020-04-14 |
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| CN111250849B (en) * | 2020-01-19 | 2021-08-13 | 宁波吉利汽车研究开发有限公司 | Manufacturing method of steel-aluminum material connecting piece and steel-aluminum material connecting piece |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2014104502A (en) * | 2012-11-29 | 2014-06-09 | Kobe Steel Ltd | Manufacturing method of structure of dissimilar joint body and manufacturing method of dissimilar joint body |
| US10010966B2 (en) * | 2014-02-14 | 2018-07-03 | GM Global Technology Operations LLC | Electrode for resistance spot welding of dissimilar metals |
| EP3153315B1 (en) * | 2015-10-05 | 2020-07-22 | Outokumpu Oyj | Method for manufacturing a welded component and use of the component |
| CN205244070U (en) * | 2015-11-18 | 2016-05-18 | 上汽通用汽车有限公司 | Connection structure between car body aluminium system part and steel part |
| CN108237320A (en) * | 2016-12-23 | 2018-07-03 | 上汽通用汽车有限公司 | Connection system for dissimilar metal part and attaching method thereof |
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Address after: 230601 No. 99 Ziyun Road, Hefei Economic and Technological Development Zone, Anhui Province Applicant after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 No. 669 Shixin Road, Taohua Industrial Park, Hefei City, Anhui Province Applicant before: Anhui Jianghuai Automobile Group Limited by Share Ltd |
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