KR101786643B1 - Car cross beam having conjunction structure made by different materials - Google Patents
Car cross beam having conjunction structure made by different materials Download PDFInfo
- Publication number
- KR101786643B1 KR101786643B1 KR1020160030761A KR20160030761A KR101786643B1 KR 101786643 B1 KR101786643 B1 KR 101786643B1 KR 1020160030761 A KR1020160030761 A KR 1020160030761A KR 20160030761 A KR20160030761 A KR 20160030761A KR 101786643 B1 KR101786643 B1 KR 101786643B1
- Authority
- KR
- South Korea
- Prior art keywords
- fixing bracket
- steering unit
- bracket
- unit fixing
- clinching
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
- B62D25/081—Cowls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
- B21D39/031—Joining superposed plates by locally deforming without slitting or piercing
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
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- B23K2203/20—
Abstract
The present invention relates to a crosstalk beam having a bonding structure of dissimilar materials, and more particularly to a crosstalk beam having a connecting beam for horizontally connecting side frames disposed on both sides of a vehicle body. A side bracket coupled to both ends of the connection beam; And a steering unit fixing bracket coupled to a surface of the connection beam, wherein at least one of the connection beam, the side bracket and the steering unit fixing bracket is made of a different material, and the side bracket and the steering unit fixing bracket At least one of which is firstly bonded to an adhesive layer formed at a connection portion with the connection beam, and then is secondarily bonded through a clinching method.
According to the present invention, it is possible to firmly and precisely join at least one of the connection beam, the side bracket, and the steering unit fixing bracket, which are made of different materials, to each other through a clinching method which is a mechanical bonding method with an adhesive, It is possible to solve the problem that the welding is not possible because the melting point is different.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a crosstalk beam having a bonding structure of dissimilar materials, and more particularly, to a crosstalk beam that is installed inside a vehicle body to protect a passenger while absorbing external impact while protecting parts inside the vehicle.
Generally, the crossbeam disposed inside the vehicle body is disposed in front of the interior of the vehicle, and is disposed in parallel to the driver's seat and the auxiliary seat so as to be fixed to the vehicle body, such as a steering wheel and a steering column.
Such a cross beam is formed in a bar shape having sufficient strength and rigidity to be able to absorb and withstand vibration transmitted from the engine and the steering wheel, while being fixedly mounted on both front pillars inside the vehicle body.
In other words, the crossbeam is composed of parts of electric and electronic systems necessary for power transmission related to start the engine, components of electronic control systems related to the braking system and the steering system, and visibility of the headlights and turn signals. Various kinds of electronic parts such as parts of apparatuses can be firmly fixed to the inside of the vehicle body.
A technique related to such a crossbeam has been proposed in Patent Publication No. 1506864. [
Hereinafter, a crosstalk beam disclosed in Japanese Laid-Open Patent Publication No. 1506864 as a prior art will be briefly described.
FIG. 1 is a view showing a crosstalk beam in the registration patent publication No. 1506864 (hereinafter referred to as "prior art").
As shown in FIG. 1, the conventional crosstalk beam is arranged in the form of a rod facing the driver's seat 20 and the assistant seat 30 in front of the interior of the vehicle body 10, and when an external impact is applied to the vehicle body 10, A main beam (100, 100 ') which mitigates the impact but can be separated into two or more along the longitudinal direction; A connecting
However, according to the prior art crosstalk beam, the
SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above-mentioned problems, and it is an object of the present invention to provide a clinching method, which is a mechanical joining method using at least one of a connecting beam, a side bracket and a steering unit fixing bracket, And it is an object of the present invention to provide a cross beam having a junction structure of dissimilar materials which can be firmly and precisely bonded and can solve the problem that welding is difficult due to the melting point of the dissimilar materials.
According to an aspect of the present invention, there is provided a vehicle including: a connecting beam for horizontally connecting side frames arranged on both sides of a vehicle body; A side bracket coupled to both ends of the connection beam; And a steering unit fixing bracket coupled to a surface of the connection beam, wherein at least one of the connection beam, the side bracket and the steering unit fixing bracket is made of a different material, and the side bracket and the steering unit fixing bracket At least one of which is first bonded to an adhesive layer formed at a bonding site with the connection beam, and then is secondarily bonded through a clinching method.
In addition, the connecting beam may be formed of a steel sheet, and the side bracket and the steering unit fixing bracket may be formed of an Al sheet.
Here, the connecting beam may have a circular or polygonal cross-sectional shape.
In particular, a protrusion may be formed on the coupling surface of the connection beam and at least one of the side bracket and the steering unit fixing bracket.
According to the present invention, it is possible to firmly and precisely join at least one of the connection beam, the side bracket, and the steering unit fixing bracket, which are made of different materials, to each other through a clinching method which is a mechanical bonding method with an adhesive, It is possible to solve the problem that the welding is not possible because the melting point is different.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a conventional cross beam. FIG.
FIG. 2 is a perspective view illustrating a state in which a steering unit fixing bracket is separated from a cross beam having a joint structure of different materials according to an embodiment of the present invention. FIG.
FIG. 3 is a side view showing a state before and after a clinching joint for fixing a steering unit fixing bracket to a connecting beam in a cross beam having a bonding structure of dissimilar materials according to an embodiment of the present invention.
FIG. 4 is a side view showing a state in which a coupling beam and a coupling portion of a steering unit fixing bracket are coupled to each other in a sawtooth shape in a cross beam having a joint structure of dissimilar materials according to an embodiment of the present invention.
5 is a side view showing a state in which a steering unit fixing bracket is coupled to a connecting beam through a hook member in a cross beam having a bonding structure of different materials according to an embodiment of the present invention.
FIG. 6 is a sample photograph for demonstrating a clinching effect according to a clinching process factor in a cross beam having a junction structure of dissimilar materials according to an embodiment of the present invention.
FIG. 7 is a graph showing a type of a clinching process failure in order to explain a clinching effect according to a clinching process factor in a cross beam having a junction structure of dissimilar materials according to an embodiment of the present invention.
FIG. 8 is a perspective view illustrating a state in which a steering unit fixing bracket is detached from a cross beam having a joint structure of dissimilar materials according to another embodiment of the present invention. FIG.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like parts are designated with like reference numerals throughout the specification.
2 is a perspective view illustrating a state in which a steering unit fixing bracket is detached from a cros- beam beam having a joint structure of dissimilar materials according to an embodiment of the present invention. And FIG. 3 is a side view showing a state before and after the clinching bonding for fixing the steering unit fixing bracket to the connecting beam in the cross beam having the bonding structure of dissimilar materials according to the embodiment of the present invention. FIG. 5 is a side view showing a state where coupling surfaces of a connecting beam and a steering unit fixing bracket are coupled to each other by a saw tooth shape in a cross beam having a bonding structure of dissimilar materials according to an embodiment of the present invention. FIG. 6 is a side view showing a state in which a steering section fixing bracket is coupled to a connecting beam through a hook member in a cross beam having a joint structure of different materials according to an example, FIG. 7 is a photograph of a sample for verifying a clinching effect according to a clinching process factor in a cross beam having a junction structure of different materials according to an embodiment of the present invention. FIG. 7 is a cross- In order to explain the clinching effects of the clinching process factors.
The
The
At this time, the
The
The
Here, the
When the
The steering
As a result, the steering
In this case, since the clinching method is not a welding method for generating carbon dioxide, it can be produced easily and stably, and it is possible to prevent air pollution in the process of producing the
Here, the steering
Since the steering
4, the steering
That is, the steering
At this time, the
5, the steering
4, the steering
The
For example, the clinching effect according to the clinching process factors will be described as follows.
First, steel specimens and aluminum specimens are fabricated for the clinching test, and the clamping holes are formed through the steel specimens.
(See FIG. 6 (a)) in which the aluminum specimen is not subjected to undercut forming and is not clinch bonded to the steel specimen (refer to FIG. 6 (a)) and the abrupt deformation of the aluminum specimen Crack cracking occurs in the aluminum specimen (see FIG. 6 (b)).
That is, the clinching effect is affected by the clinching punch corner radii "R ", the die depth, the punch pressure holding time and the press forming force, and the clinching punch corner radii" R " Cracks are generated, and it can be seen that the undercut non-forming occurs when the clinching punch corner radius "R" is larger. As shown in Fig. 7 (b), when the die depth is low, cracks are generated, and when the die depth is deep, undercut not forming occurs. As shown in Fig. 7 (c), when the punch pressure holding time is short, cracks are generated. When the punch pressure holding time is long, And when the press forming force is small, undercut unformed is generated.
As shown in Table 1, the hydraulic tonnage and the pressing time were changed. The conditions for the clinching operation after the test fabrication were checked, and the conditions for selecting the optimum process conditions after the evaluation of the clinching bonding strength were as follows: corner "R" 2.0 mm, die depth 0.5 mm, 2.5 tons of hydraulic pressure, and 3 seconds of pressing time, the clinching bonding tensile strength is optimal.
Therefore, the
FIG. 8 is a perspective view illustrating a state in which a steering unit fixing bracket is detached from a cross beam having a joint structure of dissimilar materials according to another embodiment of the present invention. FIG.
According to another aspect of the present invention, a
Meanwhile, in the present embodiment, at least one of the
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.
Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the equivalents of the appended claims, as well as the appended claims.
100: car cross beam 110: connecting beam
112: clinching hole 120: side bracket
130: Steering portion fixing bracket 140: Extra bracket
Claims (4)
A side bracket coupled to both ends of the connection beam; And
And a steering portion fixing bracket coupled to a surface of the connecting beam,
At least one of the connection beam, the side bracket, and the steering unit fixing bracket is made of different material so that at least one of the side bracket and the steering unit fixing bracket is bonded to the bonding layer formed at the connection portion with the connection beam, And then joined by a clinching method,
Wherein the connecting beam has a protrusion formed on an opposing mating surface of at least one of the side bracket and the steering unit fixing bracket.
The connecting beam is formed into a steel sheet,
Wherein the side bracket and the steering unit fixing bracket are formed of an aluminum sheet.
Wherein the connecting beam has a circular cross-sectional shape or a polygonal cross-sectional shape.
Priority Applications (1)
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KR1020160030761A KR101786643B1 (en) | 2016-03-15 | 2016-03-15 | Car cross beam having conjunction structure made by different materials |
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KR1020160030761A KR101786643B1 (en) | 2016-03-15 | 2016-03-15 | Car cross beam having conjunction structure made by different materials |
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KR20170107174A KR20170107174A (en) | 2017-09-25 |
KR101786643B1 true KR101786643B1 (en) | 2017-10-18 |
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KR102225490B1 (en) * | 2019-06-17 | 2021-03-10 | 주식회사 새한산업 | Multi material patchwork and manufacturing method thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2004338479A (en) * | 2003-05-14 | 2004-12-02 | Denso Corp | Intensity member structure for automobile |
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Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2004338479A (en) * | 2003-05-14 | 2004-12-02 | Denso Corp | Intensity member structure for automobile |
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