KR20140057022A - Door hinge for vehicle and manufacturing method of the same - Google Patents

Abstract

Disclosed is a vehicle door hinge. The disclosed vehicle door hinge includes a hinge bracket which is mounted on a vehicle pillar and a door bracket which is hinge-coupled to the hinge bracket through a hinge pin and is coupled to a door. The hinge bracket and the door bracket can be made of a carbon fiber reinforced plastic material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a door hinge for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a door hinge for a vehicle and a method of manufacturing the door hinge, and more particularly, to a door hinge for a vehicle and a method of manufacturing the same.

2. Description of the Related Art Generally, a door for a vehicle is mounted on a door frame of a vehicle body, that is, inside and below a pillar, respectively, through door hinge assemblies, and hinge assemblies are provided to hinge the pillar.

The door hinge assembly includes a hinge bracket mounted on a pillar of a vehicle body and a lower portion thereof, and a door bracket hinged to the hinge bracket through a hinge pin and engaged with the door.

That is, the door hinge assembly rotates the door bracket with respect to the hinge bracket with the hinge pin as a center axis, so that the door is opened and closed.

The hinge bracket and the door bracket of the door hinge assembly are generally manufactured by forging and pressing a steel material.

On the other hand, as the environmental awareness has increased recently, fuel efficiency standards have been strengthened according to exhaust gas regulations. As a result, the need for lighter weight of automobiles has been strengthened, and automakers have tried to implement lightweight automobiles in various ways have.

In response to this, the automobile maker has been focusing on the development of a door hinge assembly capable of realizing a light weight of a vehicle body or a door, and achieving a lightweight automobile while satisfying the performance of a door hinge assembly made of a conventional steel material.

Embodiments of the present invention provide a door hinge for a vehicle and a method of manufacturing the same, which are excellent in strength and elasticity, have excellent durability against repetitive fatigue, and are capable of reducing the weight of an automobile.

The vehicle door hinge according to an embodiment of the present invention includes a hinge bracket mounted on a pillar of a vehicle body, a door bracket hinged to the hinge bracket through a hinge pin and fastened to the door, and the hinge bracket and the door bracket And may be made of a carbon fiber reinforced plastic (CFRP) material.

Further, in the door hinge for a vehicle according to an embodiment of the present invention, the carbon fiber reinforced plastic may include carbon fiber layers impregnated with epoxy resin in carbon fiber.

In addition, in the door hinge for a vehicle according to an embodiment of the present invention, the hinge bracket and the door bracket are stacked with a plurality of carbon fiber layers corresponding to their shapes and can be cured by epoxy resin.

The plurality of carbon fiber layers constitute upper and lower surface portions of the hinge bracket and the door bracket. The plurality of carbon fiber layers constitute upper and lower surface portions of the hinge bracket and the door bracket, And a plurality of second layers having first direction and a first direction and a first direction and a first direction and a second direction.

Further, in the vehicle door hinge according to the embodiment of the present invention, the second layers may be laminated in different fiber directions.

The vehicle door hinge according to an embodiment of the present invention includes a hinge bracket mounted on a pillar of a vehicle body, a door bracket hinged to the hinge bracket through a hinge pin and fastened to the door, The door bracket is made of a carbon fiber reinforced plastic (CFRP) material including carbon fiber layers impregnated with an epoxy resin in a carbon fiber, the carbon fiber layers having different fiber directions, and the hinge bracket They can be stacked in a shape corresponding to the door bracket and can be hardened by heat.

Further, in the vehicle door hinge according to the embodiment of the present invention, carbon fiber layers having a fiber direction in the form of a fabric are laminated on upper and lower surface portions of the hinge bracket and the door bracket, and between the upper and lower surface portions, The carbon fiber layers having the fiber direction in the direction of the fiber direction are stacked and the fiber directions in one direction can be arranged differently.

A method for manufacturing a door hinge for a vehicle according to an embodiment of the present invention includes a hinge bracket mounted on a pillar of a vehicle body and a door bracket hinged to the hinge bracket through a hinge pin and fastened to the door, (A) providing respective molds having the shape of the hinge bracket and the door bracket, (b) flattening the carbon fiber layers in a pattern corresponding to the shape of the hinge bracket and the door bracket, (C) heating the carbon fiber layers to a predetermined temperature under a predetermined pressure to cure the carbon fiber layers, (e) applying a vacuum to the hinge brackets and the door brackets, The molded articles respectively molded in corresponding shapes can be machined and assembled.

In addition, in the method for manufacturing the door hinge for a vehicle according to the embodiment of the present invention, it is possible to provide a mold which can be separated and combined with each other in the step (a).

Further, in the method for manufacturing the vehicle door hinge according to the embodiment of the present invention, after the step (d), the mold may be separated and the molded product may be separated from the mold.

Further, in the method for manufacturing the door hinge for a vehicle according to an embodiment of the present invention, the plurality of carbon fiber layers may include a plurality of first layers having a fiber direction in the form of a fabric, Direction and a plurality of second layers having a plurality of directions.

Also, in the method for manufacturing the door hinge for a vehicle according to the embodiment of the present invention, in the step (c), the first layers are laminated on the mold, the second layers are laminated on the first layers, The first layers may be stacked over the two layers.

In addition, in the method for manufacturing the door hinge for a vehicle according to the embodiment of the present invention, in the step (c), the second layers may be stacked so that the fiber directions in one direction are different from each other.

(D-1) heating the carbon fiber layers in a temperature atmosphere of 80 DEG C at a pressure of 4 atm for 30 minutes, in the step (d) (D-2) the carbon fiber layers can be cured by heating them at a pressure of 4 atm in a temperature atmosphere of 135 캜 for 90 minutes.

In addition, in the method for manufacturing the door hinge for a vehicle according to an embodiment of the present invention, the epoxy resin impregnated in the carbon fiber layers is melted and the inner pores of the carbon fiber layers are removed in the step (d-1) .

Further, in the method for manufacturing the door hinge for a vehicle according to an embodiment of the present invention, in the step (e), the holes are machined to the respective molded products, the surfaces are polished, and the hinge pins are hinged to the molded products .

Embodiments of the present invention can realize weight reduction of automobile by making door hinge with carbon fiber reinforced plastic material excellent in strength and elasticity ratio compared with existing steel materials and excellent in durability against repeated fatigue.

In addition, in the embodiment of the present invention, the durability and rigidity of the door hinge can be increased by fabricating and arranging the fiber directions of the carbon fiber layers differently, and an emotional Door hinges can be made.

These drawings are for the purpose of describing an exemplary embodiment of the present invention, and therefore the technical idea of the present invention should not be construed as being limited to the accompanying drawings.
1 is a perspective view illustrating a door hinge for a vehicle according to an embodiment of the present invention.
2 is a cross-sectional view of a vehicle door hinge according to an embodiment of the present invention.
3 to 8 are views for explaining a method of manufacturing a door hinge for a vehicle according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

In the following detailed description, the names of components are categorized into the first, second, and so on in order to distinguish them from each other in the same relationship, and are not necessarily limited to the order in the following description.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

It should be noted that terms such as " ... unit ", "unit of means "," part of item ", "absence of member ", and the like denote a unit of a comprehensive constitution having at least one function or operation it means.

1 is a perspective view illustrating a door hinge for a vehicle according to an embodiment of the present invention.

Referring to FIG. 1, a vehicle door hinge 100 according to an embodiment of the present invention is configured as a door hinge assembly for hinging a door to a pillar of a vehicle body.

For example, the door hinge 100 basically includes a hinge bracket 11 mounted on a pillar of a vehicle body, a door bracket 15 hinged to the hinge bracket 11 through a hinge pin 13 and fastened to the door ).

The hinge bracket 11 of the door hinge 100 is mounted on the inside and the lower side of the pillar of the vehicle body and the door bracket 15 can be mounted on the upper and lower portions of the door corresponding to the hinge bracket 11, have.

Since the hinge bracket 11 and the door bracket 15 of the door hinge 100 are respectively provided on the upper and lower portions of the pillar and the door of the vehicle body, the shapes of the hinge bracket 11 and the door bracket 15 may be different from each other.

In the embodiment of the present invention, a door hinge (also referred to as "upper hinge") including a hinge bracket 11 mounted on the upper inside of a pillar of a vehicle body and a door bracket 15 mounted on the upper portion of the door I will explain.

However, the embodiment of the present invention is not necessarily limited thereto, but may be applied to a door hinge (also referred to as a "lower hinge") including a hinge bracket mounted on an inner lower portion of a pillar of a vehicle body and a door bracket mounted on a lower portion of the door It is possible to identify the possibility.

The hinge bracket 11 and the door bracket 15 of the door hinge 100 are provided with a plurality of holes 17 for mounting the hinge pin 13 on the vehicle body and the door.

The door hinge 100 for a vehicle according to an embodiment of the present invention configured as described above has excellent strength and elasticity as compared with conventional steel materials and has excellent durability against repetitive fatigue and is made of a material capable of reducing the weight of automobiles .

For this purpose, the hinge bracket 11 and the door bracket 15 constituting the door hinge 100 according to the embodiment of the present invention may be made of a carbon fiber reinforced plastic (CFRP) material.

The above-mentioned carbon fiber reinforced plastic (CFRP) is an advanced composite material attracting attention as a high-strength / high-elasticity lightweight structural material made of carbon (carbon) fiber as a reinforcement material and has excellent characteristics as a lightweight structural material.

These carbon fiber reinforced plastics have excellent strength and elastic modulus compared to steel materials, excellent in repetitive fatigue, excellent in dimensional stability due to low thermal expansion coefficient, and excellent in electrical conductivity, corrosion resistance and vibration damping property.

Here, as shown in FIG. 2, the carbon fiber-reinforced plastic material includes a plurality of carbon fiber layers 21 and 22 impregnated with a resin such as an epoxy resin.

The hinge bracket 11 and the door bracket 15 of the door hinge 100 according to the embodiment of the present invention are formed by stacking a plurality of carbon fiber layers 21 and 22 corresponding to these shapes, It is made of material.

The carbon fiber layers 21 and 22 of the carbon fiber reinforced plastic constituting the hinge bracket 11 and the door bracket 15 can have durability and high rigidity according to the fiber arrangement of the composite material.

The carbon fiber layers 21 and 22 are configured to have different fiber arrangements of the layers constituting the upper and lower surface portions of the hinge bracket 11 and the door bracket 15 and the upper and lower surface portions thereof .

That is, the plurality of carbon fiber layers 21 and 22 have different fiber directions and may be stacked in a shape corresponding to the hinge bracket 11 and the door bracket 15.

Specifically, the carbon fiber layers 21 and 22 include a plurality of first layers 21 constituting upper and lower surface portions of the hinge bracket 11 and the door bracket 15, a hinge bracket 11, And a plurality of second layers 22 constituting between upper and lower surface portions of the door bracket 15.

Here, the first layers 21 may be laminated with a fiber direction of a fabric type, and the second layers 22 may be laminated with a fiber direction of one direction. The second layers 22 may be arranged so that their fiber directions in one direction are different from each other.

Hereinafter, a method of manufacturing the door hinge 100 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 to 8 are views for explaining a method of manufacturing a door hinge for a vehicle according to an embodiment of the present invention.

Referring to FIG. 3, each of the molds 51 and 52 having the shapes of the above-described hinge bracket 11 and door bracket 15 is provided in the embodiment of the present invention (S1).

The molding dies 53 and 54 corresponding to the shapes of the hinge bracket 11 and the door bracket 15 are formed in the dies 51 and 52, respectively.

The respective molds 51 and 52 may be separated from each other by two bodies, and the two bodies may be fastened to each other through separate fastening means (not shown).

Then, in the embodiment of the present invention, the carbon fiber layers 21 and 22 are formed into a flat surface in a pattern corresponding to the shapes of the hinge bracket 11 and the door bracket 15 as shown in FIG. 4 (S2).

5 and 6, the carbon fiber layers 21 and 22 may include a plurality of first layers 21 (see FIG. 5) and a plurality of first layers 21 And a plurality of second layers 22 constituting between the upper and lower surface portions of the door bracket 15 and the hinge bracket 11, respectively.

The first layers 21 may be fabricated to have a fiber direction (multi-directional) in the form of a fabric as shown in FIG. 5, and the second layers 22 may be fabricated And can be processed to have fiber directions in other one direction.

In the embodiment of the present invention, when the carbon fiber layers 21 and 22 are provided, the molding layers 53 and 54 of the molds 51 and 52 are provided with a plurality of first layers 21 A plurality of second layers 22 are stacked on the first layers 21 and a plurality of first layers 21 are stacked on the second layers 22 ).

At this time, the first and second layers 21 and 22 are laminated by a vacuum compression method, and the second layers 22 are laminated such that fiber directions in one direction are different from each other.

The lamination thickness of the first layers 21 corresponding to the upper and lower surface portions of the hinge bracket 11 and the door bracket 15 is preferably maintained at 0.4 mm. It is preferable that the lamination thickness of the second layers 22 between the upper and lower surface portions of the bracket 15 is 4.4 mm.

Next, in the embodiment of the present invention, the carbon fiber layers 21 and 22 laminated on the molds 51 and 52 are heated to a predetermined temperature under a certain pressure and cured (S4).

In the above process, the carbon fiber layers 21 and 22 are heated at a pressure of 4 atm in a temperature atmosphere of 80 캜 for 30 minutes. In this process, the epoxy resin impregnated in the carbon fiber layers 21 and 22 is melted The inner pores of the carbon fiber layers 21 and 22 can be removed by the flow of the epoxy resin.

Then, in the embodiment of the present invention, the carbon fiber layers 21 and 22 are cured by heating them at a pressure of 4 atm in a temperature atmosphere of 135 캜 for 90 minutes. These conditions are applied to the characteristics of the epoxy resin whose strength increases as the curing time becomes longer.

Next, in the embodiment of the present invention, as shown in Fig. 8, the molded products 71 and 72 molded in shapes corresponding to the hinge bracket 11 and the door bracket 15 are separated from the molds 51 and 52, respectively.

At this time, if the respective molds 51 and 52 are separated into two bodies, the molded products 71 and 72 can be easily separated from the respective molds 51 and 52.

1), the hinge bracket 11 and the door (not shown) are coupled to each other, as shown in FIG. 1, The manufacture of the door hinge 100 according to the embodiment of the present invention in which the bracket 15 is hinged through the hinge pin 13 is completed.

As described above, according to the door hinge for a vehicle and the method of manufacturing the same according to the embodiment of the present invention, the hinge bracket 11 and the door bracket 15 are manufactured from carbon fiber reinforced plastic (CFRP) .

Therefore, in the embodiment of the present invention, since the door hinge 100 is made of a carbon fiber reinforced plastic material having excellent strength and elasticity as compared with conventional steel materials and excellent in durability against repeated fatigue, weight saving of the automobile can be realized.

Further, in the embodiment of the present invention, the durability and rigidity of the door hinge 100 can be increased by processing and arranging the fiber directions of the carbon fiber layers 21 and 22 differently, It is possible to fabricate the door hinge 100 with the material characteristics of the emotional door hinge.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Other embodiments may easily be suggested by adding, changing, deleting, adding, or the like of elements, but this also falls within the scope of the present invention.

11 ... hinge bracket 13 ... hinge pin
15 ... door bracket 17 ... hole
21 ... first layer 22 ... second layer
51, 52 ... mold 53, 54 ... molding
71, 72 ... molded article

Claims (16)

A door hinge for a vehicle, comprising: a hinge bracket mounted on a pillar of a vehicle body; and a door bracket hinged to the hinge bracket through a hinge pin and fastened to the door,
Wherein the hinge bracket and the door bracket are made of a carbon fiber reinforced plastic (CFRP) material. The method according to claim 1,
Wherein the carbon fiber reinforced plastic comprises carbon fiber layers in which carbon fibers are impregnated with an epoxy resin. 3. The method of claim 2,
Wherein the hinge bracket and the door bracket are laminated with a plurality of carbon fiber layers corresponding to their shapes and cured by an epoxy resin. The method of claim 3,
The plurality of carbon fiber layers,
A plurality of first layers constituting upper and lower surface portions of the hinge bracket and the door bracket and having a fiber direction in the form of a fabric,
And a plurality of second layers having a fiber direction in one direction constituting between the upper and lower surface portions of the door bracket and the hinge bracket,
Wherein the door hinge comprises: 5. The method of claim 4,
And the second layers are laminated in different fiber directions. A door hinge for a vehicle, comprising: a hinge bracket mounted on a pillar of a vehicle body; and a door bracket hinged to the hinge bracket through a hinge pin and fastened to the door,
The hinge bracket and the door bracket are made of a carbon fiber reinforced plastic (CFRP) material including carbon fiber layers impregnated with an epoxy resin in a carbon fiber,
Wherein the carbon fiber layers have different fiber directions and are laminated in a shape corresponding to the hinge bracket and the door bracket, and are hardened by heat. The method according to claim 6,
On the upper and lower surface portions of the hinge bracket and the door bracket, carbon fiber layers having a fiber direction in the form of a fabric are laminated,
Wherein carbon fiber layers having fiber directions in one direction are laminated between the upper and lower surface portions, and fiber directions in one direction are arranged differently. 1. A method for manufacturing a door hinge for a vehicle, comprising a hinge bracket mounted on a pillar of a vehicle body, and a door bracket hinged to the hinge bracket through a hinge pin and fastened to the door,
(a) providing a respective mold having a shape of the hinge bracket and the door bracket;
(b) flattening the carbon fiber layers into a pattern corresponding to the shape of the hinge bracket and the door bracket;
(c) vacuum-pressing carbon fiber layers on the respective molds to a predetermined thickness;
(d) curing the carbon fiber layers by heating to a constant temperature under a certain pressure;
(e) machining and assembling the molded product respectively corresponding to the hinge bracket and the door bracket. 9. The method of claim 8,
The method of manufacturing a door hinge for a vehicle according to claim 1, 10. The method of claim 9,
And after the step (d), separating the mold and separating the molded article from the mold. 9. The method of claim 8,
Wherein the plurality of carbon fiber layers are composed of a plurality of first layers having a fiber direction in the form of a fabric and a plurality of second layers having a fiber direction in one direction. 12. The method of claim 11,
In the step (c)
Stacking the first layers on the mold, stacking second layers on the first layers, and stacking the first layers on the second layers. 13. The method of claim 12,
And (c) stacking the second layers so that the fiber directions of the first and second layers are different from each other. 9. The method of claim 8,
In the step (d)
(d-1) heating the carbon fiber layers at a pressure of 4 atm in a temperature atmosphere of 80 캜 for 30 minutes,
(d-2) The carbon fiber layers are cured by heating at 135 ° C for 90 minutes under a pressure of 4 atm. 15. The method of claim 14,
Wherein the epoxy resin impregnated in the carbon fiber layers is melted and the pores of the carbon fiber layers are removed in the step (d-1). 9. The method of claim 8,
In the step (e)
A hole is machined in each of the molded products, the surface is polished, and the hinge pin is hinged to the molded product.

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