KR102044073B1 - Reinforcement member for car pillar and manufacturing method for the same - Google Patents

Abstract

According to one embodiment of the invention, the front portion located in front of the filler, the rear portion located behind the filler, and the intermediate portion which is bent and folded between the front portion and the rear portion, the front portion and the intermediate portion carbon The first reinforcement and the second reinforcement including a fiber-reinforced composite material is laminated, the carbon fibers contained in the first reinforcement located in the front portion is arranged in the same direction as the direction in which the front portion extends, the middle The carbon fiber contained in the first reinforcing material positioned in the portion provides a vehicle filler reinforcement arranged in a direction of ± 40 to 50 degrees relative to the direction in which the carbon fiber positioned in the front portion extends.

Description

Filler reinforcement for vehicle and manufacturing method thereof {REINFORCEMENT MEMBER FOR CAR PILLAR AND MANUFACTURING METHOD FOR THE SAME}

The present invention relates to a vehicle filler reinforcement and its manufacturing method.

The pillar of the vehicle is generally composed of A, B, and C pillars, and is mainly made of metal to protect the occupant in the event of a collision of the vehicle.

In the case of vehicle fillers, the proportion of the reinforcement is increasing to protect the occupants, and when the reinforcement is used a lot, the weight of the vehicle increases, and in the case of the A-pillar located at the front of the vehicle, the smaller the filler is, the better it is. The smaller the value, the weaker the strength of the A-pillar.

Accordingly, attempts have been made to apply fiber-reinforced composite materials as reinforcement materials that can be made lightweight and secured to increase strength while making vehicle fillers smaller.

Reinforcing materials formed from fiber-reinforced composite materials include press molding, RTM (resin transfer molding) molding, FW (filament winding) molding, autoclave molding, injection molding, drawing molding, braiding molding, and the like. There are many methods. In the automobile filler production, press molding using prepreg or RTM molding using woven fabric is used, and in the case of cylindrical molded products, braiding and RTM molding are used.

However, in the case of braiding molding, since the material property of the zero-direction material corresponding to the direction in which the filler extends is lower than that of the prepreg, the weight reduction ratio may be lowered to obtain a certain level or more strength, and in the case of press molding using prepreg, the strength is increased. It may be, but there is a problem in that mass production is inferior.

In particular, in the case of the A-pillar reinforcement having a narrow cross section and a bent structure of the filler, the manufacturing process is complicated and difficult, so that the development of the filler reinforcement that can realize high weight and high weight and have a certain level of strength is possible. It is required.

The technical problem to be solved by the present invention is to provide a vehicle filler reinforcement and a method of manufacturing the same, which can implement a lightweight while excellent in mass productivity.

In order to solve this problem, according to an embodiment of the present invention, the front portion located in front of the pillar, the rear portion located in the back of the pillar, and the intermediate portion that is bent and bent between the front portion and the rear portion, the front The first and second reinforcing members including the carbon fiber reinforced composite material and the second reinforcing material are laminated, and the carbon fiber included in the first reinforcing material positioned in the front part is in the same direction as the front part in which the front part extends. The carbon fiber contained in the first reinforcing material positioned in the middle portion provides a vehicle filler reinforcement arranged in a direction of ± 40 to 50 degrees relative to the direction in which the carbon fiber located in the front portion extends.

The second reinforcing member may be stacked in the rear portion.

The rear part may have the first reinforcement and the second reinforcement stacked.

The first reinforcement of the front portion is 1 to 5.5mm, the second reinforcement is 1 to 17mm, the first reinforcement of the rear portion is 1 to 4.2mm, the second reinforcement is 1 to 7.8mm, the first portion of the intermediate portion The first reinforcing material is 1 to 8.8mm, the second reinforcing material may be laminated to a thickness of 1 to 20mm.

In addition, according to another embodiment of the present invention, the first reinforcing material is formed by laminating and molding a carbon fiber prepreg on a mold or mandrel including a front part, a rear part and a middle part connected to the front part and the rear part and being bent. Forming a second reinforcement by laminating carbon fibers on the first reinforcement by a braiding method, injecting and curing a matrix resin, and removing the mold or the mandrel; The carbon fiber included in the first reinforcing material is located in the same direction as the direction in which the front portion extends, and the carbon fiber contained in the first reinforcing material located in the middle portion is located in the front Provided is a method of manufacturing a filler reinforcement for a vehicle arranged in a direction ± 40 ~ 50 degrees relative to the direction in which the carbon fiber extends.

As described above, according to the vehicle filler reinforcing material and the manufacturing method thereof according to the embodiment of the present invention, it is possible to implement a light weight while excellent in mass production, and may have excellent strength.

1 is a side view showing a vehicle filler according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.
3 is a photograph of a vehicle filler manufactured according to an embodiment of the present invention.

DETAILED DESCRIPTION Embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Like parts are designated by like reference numerals throughout the specification. When a part of a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the other part being "right over" but also another part in the middle. On the contrary, when a part is "just above" another part, there is no other part in the middle.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control. Also, although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, suitable methods and materials are described herein.

Hereinafter, a vehicle filler reinforcement and a method of manufacturing the same according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.

1 is a side view showing a vehicle filler according to an embodiment of the present invention, Figure 2 is a cross-sectional view taken along the line II-II of FIG.

First, a vehicle filler reinforcement according to an embodiment of the present invention will be described.

The filler reinforcing material for a vehicle according to an embodiment of the present invention extends between the front part 10 located at the front of the filler, the rear part 20 located at the rear of the filler, and the front part 10 and the rear part 20 and a predetermined angle. It includes the intermediate portion 30 that is bent by.

The filler reinforcement may be formed of a carbon fiber reinforced composite, and the carbon fiber reinforced composite may include carbon fibers and a matrix resin impregnated with carbon fibers.

The matrix resin may include an epoxy resin, a polyester resin, a vinyl ester resin, and the like, but is not limited thereto and may include various resins.

The filler reinforcement according to the embodiment of the present invention may have a form in which the first reinforcement 50 and the second reinforcement 55 are stacked.

The first reinforcement 50 of the front portion 10 may be laminated to a thickness of 1 ~ 5.5mm, the second reinforcement 55 may be laminated to a thickness of 1 ~ 17mm, the first reinforcement 50 of the rear portion 20 ) Is a thickness of 1 ~ 4.2mm, the second reinforcement 55 may be laminated to a thickness of 1 ~ 7.8mm, the first reinforcement 50 of the middle portion 30 is a thickness of 1 ~ 8.8mm, The second reinforcing material 55 may be laminated to a thickness of 1 ~ 20mm.

This is because it is possible to secure weight in such a thickness range and at the same time ensure sufficient strength.

The carbon fibers included in the first reinforcement 50 positioned in the front portion 10 of the filler reinforcement may be arranged in the same direction (hereinafter, referred to as 0 degree direction) in which the front portion 10 extends. .

Carbon fibers included in the first reinforcement 50 positioned in the rear portion 20 of the filler reinforcement may also be arranged in a 0 degree direction with respect to the direction in which the rear portion 20 extends.

In addition, the carbon fiber included in the first reinforcing material 50 positioned in the middle portion 30 of the filler reinforcing material is ± 40 ~ compared to the direction in which the carbon fiber of the first reinforcing material 50 located in the front portion 10 is extended. It may be arranged in the 50 degree direction, preferably in the ± 45 degree direction.

The vehicle filler reinforcement according to the embodiment of the present invention has been described as a structure in which the first reinforcement 50 and the second reinforcement 55 are all stacked on the front portion 10, the intermediate portion 30, and the rear portion 20. As a modification thereof, the front portion 10 and the intermediate portion 30 are laminated with both the first reinforcement 50 and the second reinforcement 55, and the rear portion 20 includes only the second reinforcement 55. It may be a structure.

Next, the manufacturing method of the vehicle filler reinforcement material which concerns on the Example of this invention is demonstrated.

In the manufacture of a vehicle filler reinforcement according to an embodiment of the present invention, forming a first reinforcement 50 by laminating and molding carbon fiber prepreg in a mold or mandrel, and braiding on the first reinforcement 50 ( laminating carbon fibers, injecting and curing a matrix resin to form a second reinforcement 55, and removing a mold or a mandrel.

Each step is described below in order.

First, the first reinforcement 50 is formed through lamination and molding of carbon fiber prepreg on a mold or mandrel.

The carbon fiber prepreg may use a unidirectional (UD) prepreg, and after laminating the carbon fiber prepreg on a mold or mandrel, may be heated to form the first reinforcement 50.

At this time, the first reinforcement 50 of the front portion 10 is 1 ~ 5.5mm thickness, the first reinforcement 50 of the rear portion 20 is 1 ~ 4.2mm thickness, the intermediate portion 30 The first reinforcement of can be laminated to a thickness of 1 ~ 8.8mm.

This is because it is possible to secure weight in such a thickness range and at the same time ensure sufficient strength.

The front portion 10 of the filler reinforcement may be formed such that the carbon fibers are arranged in the 0 degree direction with respect to the direction in which the front portion 10 extends.

The rear portion 20 of the filler reinforcement may be formed such that the carbon fibers are arranged in the 0 degree direction with respect to the direction in which the rear portion 20 extends.

In addition, the intermediate portion 30 of the filler reinforcement may be formed such that the carbon fibers are arranged in a direction of ± 40 to 50 degrees relative to the direction in which the carbon fibers located in the front portion 10 extend, preferably ± 45 degrees direction It can be formed so as to be arranged.

Next, the carbon fiber is laminated on the formed first reinforcement 50 by a braiding method, and the second resin 55 is formed by injecting and curing the matrix resin.

At this time, the second reinforcing material 55 of the front portion 10 is 1 ~ 17mm thickness, the second reinforcing material 55 of the rear portion 20 is 1 ~ 7.8mm thickness, of the intermediate portion 30 The second reinforcing material 55 may be laminated to a thickness of 1 to 20mm.

The second reinforcing material 55 may be formed by injecting and curing the matrix resin after the carbon fiber is formed in three axes or two axes by the braiding method.

Thereafter, the mold or mandrel may be removed to complete the vehicle filler reinforcement according to the embodiment of the present invention.

Actually manufactured vehicle filler reinforcement is shown in FIG.

Hereinafter, the configuration and effects of the present invention will be described in more detail with reference to Examples and Comparative Examples. However, this embodiment is intended to illustrate the present invention in more detail, and the scope of the present invention is not limited to these examples.

Example 1

Urethane foam was compression molded in a mold to prepare a mandrel, and carbon fiber prepreg (CU150NS, Carbon Korea Co., Ltd.) was laminated on the mandrel. At this time, the front portion is laminated so that the carbon fibers are arranged in a 0 degree direction with respect to the direction in which the front portion extends, the middle portion is laminated so that the carbon fibers are arranged in a direction ± 45 degrees relative to the direction in which the carbon fibers arranged in the front portion is extended, The rear portion was laminated so that the carbon fibers were arranged in the 0 degree direction with respect to the direction in which the rear portion extended. Carbon fiber prepregs stacked in the front, middle and rear portions were all laminated to a thickness of 3.5 mm.

The hot press was preheated at 120 ° C., and the mandrel with the carbon fiber prepreg laminated therein was put into a mold, and then molded at 1 MPa pressure at 120 ° C. for 1 hour to prepare a first reinforcing material.

The carbon fiber (T700SC-12K-50C, Toray Advanced Materials) is braided on the first reinforcement with a thickness of 3.5 mm in three axes of 0 degrees / +45 degrees / -45 degrees using a braiding device (FAW360gsm). It was.

A mandrel braided with carbon fibers was put in a mold, and a matrix resin (SIC-500R / L, Shina T & C) was injected for 5 minutes at 120 MPa at 3 MPa pressure, and then cured for 30 minutes to prepare a second reinforcing material.

Thereafter, the mandrel was removed to prepare a hollow A-pillar reinforcement.

Example 2

Urethane foam was compression molded in a mold to prepare a mandrel, and carbon fiber prepreg (CU150NS, Carbon Korea Co., Ltd.) was laminated on the mandrel. At this time, the front part was laminated so that the carbon fibers were arranged in a 0 degree direction with respect to the direction in which the front part extended, and the middle part was laminated so that the carbon fibers were arranged in a direction of ± 45 degrees relative to the direction in which the carbon fibers arranged in the front part were extended. The carbon fiber prepregs laminated at the front part and the middle part were all laminated to a thickness of 3.5 mm.

The hot press was preheated at 120 ° C., and the mandrel with the carbon fiber prepreg laminated therein was put into a mold, and then molded at 1 MPa pressure at 120 ° C. for 1 hour to prepare a first reinforcing material.

Thereafter, the rear mandrel was connected, and carbon fiber (T700SC-12K-50C, Toray Advanced Materials) was placed on the front, middle first reinforcement and rear mandrel using a braiding device (FAW360gsm) at 0 degrees / + 45 degrees. Braiding was performed with a thickness of 3.5 mm in three axes in the direction of -45 degrees.

A mandrel braided with carbon fibers was put in a mold, and a matrix resin (SIC-500R / L, Shina T & C) was injected for 5 minutes at 120 MPa at 3 MPa pressure, and then cured for 30 minutes to prepare a second reinforcing material.

Thereafter, the mandrel was removed to prepare a hollow A-pillar reinforcement.

Comparative Example 1

Urethane foam was compression molded in a mold to prepare a mandrel, and carbon fiber prepreg (CU150NS, Carbon Korea Co., Ltd.) was laminated on the mandrel. At this time, the front portion is laminated so that the carbon fibers are arranged in a 0 degree direction with respect to the direction in which the front portion extends, the middle portion is laminated so that the carbon fibers are arranged in a direction ± 45 degrees relative to the direction in which the carbon fibers arranged in the front portion is extended, The rear portion was laminated so that the carbon fibers were arranged in the 0 degree direction with respect to the direction in which the rear portion extended. The carbon fiber prepreg laminated to the front part was laminated to 5.5 mm thick, the carbon fiber prepreg laminated to the middle part 8.8 mm thick, and the carbon fiber prepreg laminated to the rear part 4.2 m thick.

The hot press was preheated at 120 ° C., and the mandrel with the carbon fiber prepreg laminated therein was put into a mold, and then molded at 1 MPa pressure at 120 ° C. for 1 hour to prepare a first reinforcing material.

Thereafter, the mandrel was removed to prepare a hollow A-pillar reinforcement.

Comparative Example 2

Mandrel is manufactured by compression molding urethane foam in a mold, and carbon fiber (T700SC-12K-50C, Toray Advanced Materials) is placed on the mandrel using a braiding device (FAW360gsm) in the direction of 0 ° / + 45 ° / -45 °. Braiding was performed in three axes.

At this time, the front part was laminated with a thickness of 17 mm, the middle part with a thickness of 20 mm, and the rear part with a thickness of 7.8 mm.

A mandrel braided with carbon fibers was put in a mold, and a matrix resin (SIC-500R / L, Shina T & C) was injected for 5 minutes at 120 MPa at 3 MPa pressure, and then cured for 30 minutes to prepare a second reinforcing material.

Thereafter, the mandrel was removed to prepare a hollow A-pillar reinforcement.

Comparative Example 3

As the first reinforcing material, the carbon fiber arrangement of the carbon fiber prepreg is arranged so that the front, middle, and rear portions are all 0 degrees, and the front portion is 3.5 mm thick, the middle portion is 0.4 mm thick, and the rear portion is 1.1 mm thick. As a second reinforcing material, a hollow A-pillar reinforcing material was manufactured in the same manner as in the embodiment except that the front part was laminated in a thickness of 5.3 mm, the middle part was 14 mm, and the rear part was 4.5 mm.

Comparative Example 4

The hollow A-pillar reinforcement was manufactured in the same manner as in the example except that the carbon fiber arrangement direction of the carbon fiber prepreg positioned in the middle of the first reinforcement was arranged to be in a direction of ± 30 degrees.

Comparative Example 5

A hollow A-pillar reinforcement was manufactured in the same manner as in the example except that the carbon fiber arrangement direction of the carbon fiber prepreg positioned in the middle of the first reinforcement was arranged to be in a direction of ± 60 degrees.

Experimental Example

(1) weighing

The weight of the hollow A-pillar reinforcement prepared according to Examples 1 and 2 and Comparative Examples 1 to 5 was measured.

(2) A-pillar front deformation measurement

The A-pillar anterior deformation was measured by the FEM analysis, and the solver was calculated by linear static analysis using Nastran program and optimization using Genesis program.

The results are shown in Table 1 below.

Weight (kg) A-pillar deformation amount (mm) Example 1 1.50 1.60 Example 2 1.47 1.60 Comparative Example 1 1.69 2.30 Comparative Example 2 3.59 3.30 Comparative Example 3 2.33 2.60 Comparative Example 4 1.47 3.40 Comparative Example 5 1.47 2.30

As shown in Table 1, Examples 1 and 2, in which the first reinforcing material and the second reinforcing material were laminated together, had a light weighting effect and had the least amount of deformation in the front of the A-pillar, and in the case of Comparative Examples 1 to 5, It confirmed that it was large compared with Examples 1-2.

As described above, according to the vehicle filler reinforcing material and the manufacturing method thereof according to the embodiment of the present invention, it is possible to implement a light weight while excellent in mass production, it may have an excellent strength.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

10: front 20: rear
30: middle part

Claims (7)

Front part located in front of the filler,
A rear portion located behind the pillar, and
An intermediate portion that is bent and connected between the front portion and the rear portion,
The front portion, the rear portion and the intermediate portion is laminated with a first reinforcement and a second reinforcement, including a carbon fiber reinforced composite material,
Carbon fibers contained in the first reinforcing material positioned in the front and rear portions are arranged in the same direction as the direction in which the front portion extends,
The carbon fibers included in the first reinforcing material positioned in the middle portion are arranged in a direction of ± 40 to 50 degrees relative to the direction in which the carbon fibers positioned in the front portion extend.
The first reinforcement of the front portion is 1 ~ 5.5mm, the second reinforcement is 1 ~ 17mm, the first reinforcement of the rear portion is 1 ~ 4.2mm, the second reinforcement is 1 ~ 7.8mm, the first 1, the reinforcing material is 1 ~ 8.8mm, the second reinforcing material is a vehicle filler reinforcement is laminated in a thickness of 1 ~ 20mm. delete delete delete Stacking and molding a carbon fiber prepreg on a mold or mandrel comprising a front portion, a rear portion, and a middle portion connected to the front portion and the rear portion to form a first reinforcement material,
Stacking carbon fibers on the first reinforcement by a braiding method and injecting and curing a matrix resin to form a second reinforcement; and
Removing the mold or the mandrel,
The carbon fibers contained in the first reinforcing material positioned in the front and rear portions are arranged in the same direction as the direction in which the front portion extends,
The carbon fiber included in the first reinforcing material located in the middle portion is arranged in a direction of ± 40 ~ 50 degrees compared to the direction in which the carbon fiber located in the front portion is extended,
The first reinforcement of the front portion is 1 ~ 5.5mm, the second reinforcement is 1 ~ 17mm, the first reinforcement of the rear portion is 1 ~ 4.2mm, the second reinforcement is 1 ~ 7.8mm, the first 1 reinforcement is 1 ~ 8.8mm, the second reinforcement is a method of manufacturing a filler reinforcement for vehicles to be laminated in a thickness of 1 ~ 20mm. delete delete

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