KR101786643B1 - Car cross beam having conjunction structure made by different materials - Google Patents

Car cross beam having conjunction structure made by different materials Download PDF

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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
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South Korea
Prior art keywords
fixing bracket
steering unit
bracket
unit fixing
clinching
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KR1020160030761A
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Korean (ko)
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KR20170107174A (en
Inventor
공문규
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(주)지엔에스케이텍
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Publication of KR20170107174A publication Critical patent/KR20170107174A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D25/00Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08Front or rear portions
    • B62D25/081Cowls
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/03Application 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
    • B21D39/031Joining superposed plates by locally deforming without slitting or piercing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/02Non-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
    • 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 car cross beam,

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 beam 200 connecting and disconnecting the main beams 100 and 100 'separated so that the separated portions of the main beams 100 and 100' are interconnected; Beam fixing brackets 300 and 300 'formed at both ends of the main beams 100 and 100' and fixed to both front pillars 40 of the vehicle body 10; An airbag fixing bracket (not shown) for supporting an airbag 50 disposed inside the vehicle body 10 in front of the auxiliary seat 30, the airbag 50 being connected to a lower portion of the beam fixing bracket 300 ' 400); The main beam 100 is connected to the main beam 100 arranged in front of the driver's seat 20 to support a steering wheel 60 disposed in front of the driver's seat 20, And a supporting plate 520 extending from the fixing pipe 510 and supporting the steering wheel 60. The supporting plate 520 is fixed to the supporting plate 520 by welding, A wheel fixing bracket (500) further comprising a wheel protecting frame (530) for protecting a part of the steering wheel (60), which is provided inside the vehicle body (10) And an air conditioner (80) positioned at a lower center of the connecting beam (200) and exposed to the outside from the inside of the vehicle body (10) And a support arm 620 for supporting the connection beam 200 while being vertically connected to both sides of the support body 610. The support body 610 supports the connection beam 610, And an audio fixing bracket 600 further including a component protecting frame 630 for protecting the audio 70 and the components provided inside the vehicle body 10 among the ancillary components of the air conditioner 80 .

However, according to the prior art crosstalk beam, the fixing pipe 510 of the wheel fixing bracket 500 is fitted to the outer surface of the main beams 100 and 100 'and then fixed by welding. In welding the main beams 100 and 100' ') And the fixing pipe 510 are melted and bonded to each other, thereby lowering the bonding accuracy.

Korean Patent Publication No. 1506864

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 cross beam 100 having a bonded structure of different materials according to an embodiment of the present invention includes a connecting beam 110, a side bracket 120, a steering portion fixing bracket 130, and an extra bracket 140).

The connection beams 110 are cylindrically-formed hollow cylinders, which are disposed on both sides of the vehicle body to connect the side frames laterally to impart rigidity to the front of the vehicle body. The connecting beams 110 are used for clinching connection with the steering unit fixing bracket 130 A plurality of clinching holes 112 are formed through the surface.

At this time, the connection beam 110 is formed of a steel sheet to contribute to improvement of durability. The connection beam 110 is provided with various brackets for installing an instrument panel, an air conditioning duct, a fuse box, an air bag, and the like.

The connection beam 110 supports a steering column via a steering unit fixing bracket 130 to be described later and is designed to have a rigidity enough to absorb engine vibrations transmitted from the steering column do.

The side brackets 120 are respectively coupled to both ends of the connection beams 110 to fix the connection beams 110 to the side frames.

Here, the side bracket 120 is fixed to both ends of the connection beam 110 by applying an aluminum sheet pressurizing method. When the side bracket 120 is fixed, an adhesive is applied to the connection portion with the connection beam 110, A) may be formed and then joined in a first order by a clinching method.

When the side bracket 120 is joined to the connection beam 110 by the clinching method, a plurality of clinching holes 112 for the clinching connection are formed on the upper surface of the connection beam 110 .

The steering part fixing bracket 130 is bonded to the surface of the connection beam 110 and is first bonded to the adhesive layer A by first forming an adhesive layer A at a bonding site with the connection beam 110, So that they are bonded to each other through a second method.

As a result, the steering part fixing bracket 130 can be fixed to the clinching hole 112 of the connecting beam 110 by a clinching method or the like, and can be fixed without any processing. Due to such a clinching method, The steering unit fixing bracket 130 can be fixed in any form because the space for mounting the steering unit fixing bracket 130 is formed on the mounting portion 110.

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 crosstalk beam 100, The bonding precision is improved, the bonding can be firmly performed, and the bonding structure is simplified, thereby improving the workability.

Here, the steering unit fixing bracket 130 is an aluminum sheet to which a high strength, high elongation die casting aluminum alloy is applied.

Since the steering beam fixing bracket 130 is made of an Al sheet and the connecting beam 110 to which the steering beam fixing bracket 130 is fixed is made of a steel sheet, 100), it is possible to firmly and precisely bond different kinds of materials having different melting points.

4, the steering unit fixing bracket 130 is coated with the adhesive layer A on the fixing surface of the connecting beam 110, but the seating angle may change before the adhesive layer A hardens, It can be prevented through the projection.

That is, the steering unit fixing bracket 130 is formed with fine teeth 132 on the curved seating surface, so that when the steering bracket 130 is engaged with the fine teeth 114 formed on the upper end of the outer peripheral surface of the coupling beam 110 in the same direction as the axial direction, Can be maintained or the seating angle can be fine-tuned.

At this time, the teeth 132 and 114 formed on the coupling surface of the steering part fixing bracket 130 and the coupling beam 110 are of the mountain type, but they may be formed in a rectangular shape, a trapezoid shape or an arcuate shape.

5, the steering unit fixing bracket 130 is mounted on the front and rear sides of the bottom surface of the connecting beam 110 so as to fix the connecting beam 110, respectively. Here, the hook member 134 is circularly formed so that the opposing inner wall surfaces thereof are in contact with the outer circumferential surfaces at both ends of the connecting beam 110, and the hook member 134 is inserted into the insertion hole 130a formed in the front and rear of the steering unit fixing bracket 130 A locking projection is formed at the lower end of the slant projection 134a spaced apart by the thickness of the steering portion fixing bracket 130 so as to be hooked on the bottom surface of the steering portion fixing bracket 130 do.

4, the steering unit fixing bracket 130 is mounted on the connection beam 110 by fine teeth, and can be fixed to the connection beam 110 through the hook member 134 as shown in FIG. 5 have.

The extra bracket 140 is installed at the center of the connection beam 110 to fix the acoustic device and the air conditioner etc. and is manufactured by a selective method such as casting, extrusion, press, etc., ).

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.

Figure 112016024675645-pat00001

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 cross beam 100 having the bonding structure of the different materials according to the present invention is made of an aluminum sheet (Al sheet) to which a high strength, high elongation die casting aluminum alloy is applied to the connecting beam 110 made of a steel sheet In order to bond at least one of the manufactured side brackets 120 and the steering part fixing brackets 130, an adhesive is applied to the bonding surfaces to form an adhesive layer A, and then bonded together in a primary bonding process. Can be joined by car.

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 cross beam 200 having a bonded structure of different materials according to another embodiment of the present invention includes a connecting beam 210, a side bracket 220, a steering portion fixing bracket 230, Wherein the connection beam 210 has a rectangular cross-sectional shape, and the groove shape of the side bracket 220, which is fixed to the square bracket 220, is rectangular and the seating portion of the steering unit fixing bracket 230 is'

Figure 112016024675645-pat00002
Quot; shape, and the remaining structure is the same in structure and function as those in the previous embodiment, and thus a detailed description thereof will be omitted.

Meanwhile, in the present embodiment, at least one of the side bracket 220 and the steering unit fixing bracket 230, which is made of an aluminum sheet and to which a high strength, high elongation die casting aluminum alloy is applied to the connecting beam 210 made of a steel sheet, An adhesive layer is formed on the joint surface to form a connecting beam 210, which is formed in a rectangular cross-sectional shape in a process of secondarily joining through the clinching process in a state where the adhesive layer is first bonded, The steering portion fixing bracket 230 is fixed, and in particular, the steering portion fixing bracket 230 can be prevented from being rotated.

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 connecting beam for horizontally connecting the side frames arranged on both sides of the vehicle body;
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 method according to claim 1,
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.
The method according to claim 1,
Wherein the connecting beam has a circular cross-sectional shape or a polygonal cross-sectional shape.
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KR1020160030761A 2016-03-15 2016-03-15 Car cross beam having conjunction structure made by different materials KR101786643B1 (en)

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KR102225490B1 (en) * 2019-06-17 2021-03-10 주식회사 새한산업 Multi material patchwork and manufacturing method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004338479A (en) * 2003-05-14 2004-12-02 Denso Corp Intensity member structure for automobile

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004338479A (en) * 2003-05-14 2004-12-02 Denso Corp Intensity member structure for automobile

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