KR20200082913A - Seat back frame for car and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a seatback frame for a hybrid SUV two-row vehicle and a manufacturing method thereof, wherein a frame body unit is made of a composite material, a reinforcing unit installed on a load unit where a load increases in the frame body unit or a cutting unit is made of a metal material to achieve lighter weight than a seatback frame made of only the existing metal material and to increase stiffness quality and strength quality more than the seatback frame made of only the composite material, an energy absorption rate is improved through plastic deformation of the load unit or the cutting unit to prevent adverse effects on surrounding parts, and accordingly, durability and reliability are maximized, and finally fuel economy, stability and reliability of the vehicle are improved.

Description

Seat back frame for car and its manufacturing method{Seat back frame for car and method for manufacturing the same}

The present invention relates to a seatback frame for automobiles and a method for manufacturing the same, and more specifically, the frame body part is formed of a composite material, and a reinforcement part installed in a load part or a cutting part in which a load load increases in the frame body part is made of a metal material. It relates to a hybrid SUV two-row car seatback frame that can compensate for the shortcomings of the car seatback frame formed by forming only a composite material or only a metal material, and a method for manufacturing the same.

A typical car seatback frame has a function of protecting passenger safety when the cargo located behind the rear seat suddenly moves forward due to the sudden stop of the vehicle.

That is, in general, a seat provided in a vehicle includes a cushion frame supporting a lower body when a passenger is seated, and a seat back frame coupled to a cushion frame to have a structure that rotates in the front-rear direction to support the upper body of a passenger. (seatback frame).

As shown in Fig. 2, this conventional automobile seatback frame 3 is formed of metal, in particular, steel (STEEL). As described above, when forming a seatback frame for automobiles with metal, sufficient rigidity can be secured, but there is a problem in that the weight is heavy.

In other words, the seatback frame 3 for automobiles formed of a conventional metal material is heavy, so that it is not possible to reduce the weight and miniaturization of the automobile, and finally, the fuel efficiency of the automobile cannot be improved.

In addition, the seatback frame 3 for automobiles formed of a conventional metal material has a problem in that the number of parts increases, so that the process increases and the manufacturing cost and manufacturing time increase, resulting in operator inconvenience.

In order to solve this problem, if considering the weight reduction and improvement of fuel efficiency of the vehicle, it is necessary to replace it with a lightweight material. A lightweight material that can replace steel (STEEL) should be considered while protecting the safety of passengers when cargo located in the trunk moves forward due to an emergency stop, while also considering weight savings.

In general, composites reinforced with glass fibers have been studied. However, in order to have the strength of steel (STEEL), since a large amount of glass fibers must be used as a reinforcing material, additional weight reduction is required. Carbon fiber is a material that can satisfy these needs. Since carbon fiber can exhibit high-strength properties even in a small amount, many studies have been conducted as reinforcements for composite materials in various fields.

The conventionally known reinforcing technology is a case in which reinforcing materials such as glass fiber and carbon fiber are applied alone, and in the case of carbon fiber alone, the lightening effect and the effect of increasing strength are excellent, but commercial application is difficult due to economic problems due to the high price of carbon fiber. There was.

As shown in Fig. 1, the seatback frame 2 for automobiles formed of a conventional composite material can achieve light weight while securing strength. However, as shown in FIGS. 3 to 4, the seatback frame 2 for automobiles formed of a composite material has a problem of adversely affecting peripheral correlation parts due to a decrease in its own energy absorption rate due to excessive rigidity. Automotive seatback frame (2) formed of a composite material is helpful in maintaining the proper level of strength (strength), but there is a limit to sufficiently increase the stiffness (stiffness) of the product.

As described above, in a concept different from the stiffness and stiffness of a car seatback frame, strength refers to the strength of an object, that is, the deformation resistance until the material is destroyed when a material is loaded, whereas stiffness ) Means the degree of stiffness or stiffness of the material. In the case of a car seatback frame, it is a concept that includes emotional quality.

For example, when the occupant is seated, when the seat is folded down, or when the armrest is pressed, the stiffness of the seatback frame is insufficient, for example. It is difficult to quantify, but it needs to be minimized.

Therefore, despite securing the product strength that satisfies the international performance regulations through strength reinforcement as described above, such a stiffness deficiency phenomenon is still occurring.

As a result, as shown in FIG. 4, deformation occurs in a portion that is heavily loaded, but energy absorption is reduced, and thus plastic deformation does not occur or occurs, and due to such deformation, wear occurs in the teeth to which the recliner is coupled, resulting in recliner. There was a problem in that the locking function was lost and the international performance regulations were dissatisfied, and noise was generated even during operation, causing unpleasant sensations to the occupants, and cost and time were spent to maintain or replace it.

However, as shown in FIG. 5, the seatback frame 3 for a vehicle formed of a metal material is plastically deformed in a portion where a load is heavily applied, and as the load is distributed, damage to the recliner mounting portion is minimal, thereby causing damage to surrounding parts. Although it does not give damage or breakage, it can satisfy international performance regulations and reduce maintenance costs. However, there is a problem in that the number of parts cannot be increased to achieve lighter weight and smaller size, and finally it is not possible to improve the fuel efficiency of automobiles.

Therefore, it is desperate to develop a hybrid two-row car seatback frame made of a composite material and a metal material in order to minimize the damage or damage to surrounding components while improving the fuel efficiency and performance of the vehicle by reducing weight and miniaturization through analysis of the part where the load is concentrated. Is required.

Republic of Korea Patent Publication No. 10-2016-0121622

The present invention is to solve the above problems, the object of the present invention is the frame body portion is formed of a composite material, the reinforcement portion installed in the load portion or the cutting portion of the load increase in the frame body portion is formed of a metal material By reducing the weight compared to the seatback frame formed of only existing metal materials, increasing the quality of stiffness and strength compared to the seatback frame formed only of composite materials, and improving the energy absorption rate through plastic deformation of the load or cutting parts, surrounding parts It is to provide a hybrid SUV two-row car seatback frame and a method of manufacturing the same to prevent adverse effects on the product, thereby maximizing durability and reliability, and finally improving the fuel efficiency, stability, and reliability of the vehicle.

In order to achieve the object of the present invention, an automobile seatback frame according to an embodiment of the present invention includes a frame body part in an automobile seatback frame; A load portion in which a load load increases on a part of the frame body portion; And a reinforcing portion fastened to the load portion to increase energy absorption through plastic deformation of the load portion.

In addition, in a preferred embodiment of the seatback frame for a vehicle according to the present invention, the frame body portion and the reinforcement portion of the seatback frame for automobiles may be formed of different materials.

In addition, in a preferred embodiment of a seatback frame for a vehicle according to the present invention, the frame body portion of the seatback frame for a vehicle may be formed of a composite material, and the reinforcement portion may be formed of a metal material.

In addition, in a preferred embodiment of a seatback frame for a vehicle according to the present invention, the frame body portion of the seatback frame for automobiles includes a plurality of rib portions formed in the horizontal or vertical direction or radially in the frame body portion to reinforce strength; It may include.

In addition, in a preferred embodiment of the seatback frame for a vehicle according to the present invention, the frame body portion of the seatback frame for automobiles includes a plurality of channel portions formed in the horizontal or vertical direction of the frame body portion to reinforce strength. It can contain.

In addition, in a preferred embodiment of the seatback frame for a vehicle according to the present invention, the reinforcing part of the seatback frame for automobiles is bolt-nut fastened, rivet fastened, boss-screw fastened, and welded after forming a steel bracket insert in the fastened part It can be fastened in one of two ways.

In order to achieve the object of the present invention, a seatback frame for an automobile according to another embodiment of the present invention includes a frame main body in a two-row seatback frame for an SUV vehicle; A cutting portion formed through cutting to reduce elastic deformation of a portion where a load load is concentrated on a part of the frame body portion; And a reinforcing portion coupled to the cutting portion to increase energy absorption through plastic deformation of the cutting portion.

In addition, in another preferred embodiment of the seatback frame for a vehicle according to the present invention, the frame body portion of the seatback frame for automobiles includes a plurality of ribs formed in the horizontal or vertical direction or radially in the frame body portion to reinforce strength; It may include.

In addition, in another preferred embodiment of the seatback frame for a vehicle according to the present invention, the frame body part of the seatback frame for a vehicle is formed in a U-shape in a horizontal or vertical direction in the frame body part to reinforce strength. It may further include a channel portion.

In addition, in another preferred embodiment of the automobile seatback frame according to the present invention, the frame body portion and the reinforcement portion of the automobile seatback frame may be formed of different materials.

In addition, in another preferred embodiment of the automobile seatback frame according to the present invention, the frame body portion of the automobile seatback frame may be formed of a composite material, and the reinforcement portion may be formed of a metal material.

In addition, in another preferred embodiment of the automobile seatback frame according to the present invention, the frame body portion of the automobile seatback frame is formed of any one of LWRT, SMC GMT, LFT, CFRTPC or a composite of two or more thereof, and the reinforcement The part may be formed of either steel, aluminum, or a composite thereof.

In addition, in another preferred embodiment of the seatback frame for a vehicle according to the present invention, the reinforcing part of the seatback frame for automobiles is bolt-nut coupled to the cutting part, boss-screw coupled to the cutting part, and welded after forming the steel bracket insert into the load part. It can be combined in one of two ways.

In order to achieve another object of the present invention, a method for manufacturing a seatback frame for a vehicle according to an embodiment of the present invention includes forming a frame body part with a composite material in a method for manufacturing a seatback frame for a vehicle; Analyzing a load portion in which the load is concentrated in the frame body portion; Determining the shape, size, and thickness of the reinforcement portion coupled to the load portion according to the load portion analysis; Forming the reinforcing part having a determined shape with a metal material; And coupling the reinforcing part to the load part.

In addition, in another preferred embodiment of the method of manufacturing a seatback frame for a vehicle according to the present invention, the method for manufacturing a seatback frame for a vehicle trims the seatback frame to conform to the final seatback frame for a vehicle after the step of joining the reinforcing parts. Step; may further include.

In order to achieve another object of the present invention, a method for manufacturing a seatback frame for a vehicle according to another embodiment of the present invention comprises: analyzing a load load of a frame body part in a method for manufacturing a two-row seatback frame for an SUV car; Forming a frame body part with a composite material; Forming a cutting part by cutting a portion where the load load is concentrated in the frame body part; Forming a reinforcement part coupled to the cutting part with a metal material; And coupling the reinforcing part to the cutting part.

In addition, in another preferred embodiment of the method for manufacturing a seatback frame for a vehicle according to the present invention, the method for manufacturing a seatback frame for a vehicle is provided to the final SUV car two-row seatback frame after the step of joining the reinforcing parts. Trimming to match; may further include.

The seatback frame for automobiles according to the present invention and the manufacturing method thereof are formed of a composite material, and a reinforcement part installed in a load portion or a cutting portion in which a load load increases in the frame body portion is formed of a metal material, so that only the existing metal material is used. It is designed to be lighter than the seatback frame to be formed, to increase the stiffness and strength quality than the seatback frame to be formed of only composite materials, and to improve the energy absorption rate through plastic deformation of the load or cutting section, thereby preventing adverse effects on peripheral parts. There is an effect that can be done.

In addition, the seatback frame for a vehicle according to the present invention and its manufacturing method reinforce the rigidity and strength while preventing a decrease in energy absorption rate to prevent damage or breakage of surrounding parts, thereby saving time or cost for replacing it. It has the effect of reducing the maintenance cost and time of the vehicle, thereby preventing waste of cost and resources.

Moreover, the seatback frame for automobiles according to the present invention and a manufacturing method thereof have the effect of maximizing the durability and reliability of each component and the vehicle and improving the reliability of the vehicle.

In addition, the vehicle seatback frame according to the present invention and a method for manufacturing the vehicle promote light weight and miniaturization of the vehicle, improve the strength and rigidity quality of the seatback frame, and prevent the adverse effects of surrounding parts as the energy absorption rate increases, thereby improving the fuel efficiency of the vehicle. It has the effect of improving stability and performance.

1 shows a conceptual diagram of a seatback frame for a vehicle formed of only a conventional composite material.
Figure 2 shows a conceptual diagram of a seatback frame for a vehicle formed of only a conventional metal material.
Figure 3 shows a photograph of the Australian ADR 34/02 legislative evaluation test of a car seatback frame formed of only a conventional composite material.
4 shows a reaper in a state in which peripheral parts are damaged through the test of FIG. 3.
Figure 5 shows a photograph of the Australian ADR 34/02 legislative evaluation test of a seatback frame for a vehicle formed of only a conventional metal material.
6 shows a conceptual diagram of an automobile seatback frame according to the present invention.
7 shows a conceptual diagram of a reinforcing part installed in an automobile seatback frame according to the present invention.
8 is a conceptual view showing a state in which the reinforcing part is installed with a bolt-nut, rivet, or boss-screw on a load portion or a cutting portion of a vehicle seatback frame according to the present invention.
9 is a conceptual view showing a state in which a reinforcement part is installed by insert molding in a load part or a cutting part of an automobile seat back frame according to the present invention.
Figure 10 shows a picture of performing the Australian ADR 34/02 legal evaluation test of the automotive seatback frame according to the present invention.
FIG. 11 is a graph for data analysis of the evaluation test of FIG. 10.
12 is a flowchart of a method of manufacturing a seatback frame for a vehicle according to an embodiment of the present invention.
13 is a flowchart of a method of manufacturing a seatback frame for a vehicle according to another embodiment of the present invention.

Hereinafter, with reference to the drawings of a vehicle seat back frame according to an embodiment of the present invention and a method of manufacturing the same will be described in detail. The embodiments introduced below are provided as examples in order to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. In addition, in the drawings, the size and thickness of the device may be exaggerated for convenience. Throughout the specification, the same reference numbers indicate the same components.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains. It is provided to fully inform the holder of the scope of the invention, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification. In the drawings, the size and relative size of layers and regions may be exaggerated for clarity of explanation.

The terminology used herein is for describing the embodiments, and thus is not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, "comprise" and/or "comprising" refers to the components, steps, operations and/or elements mentioned above, the presence of one or more other components, steps, operations and/or elements. Or do not exclude additions.

6 shows a conceptual view of a seatback frame for a vehicle according to the present invention, and FIG. 7 shows a conceptual view of a reinforcement part installed in a seatback frame for a vehicle according to the present invention. 8 is a conceptual view showing a state in which the reinforcement part is installed with a bolt-nut, a rivet, or a boss-screw on a load portion or a cutting portion of a vehicle seatback frame according to the present invention, and FIG. 9 is a view of the vehicle seatback frame according to the present invention It shows the conceptual diagram of the state where the reinforcement part is installed by insert molding in the load part or the cutting part. FIG. 10 shows a photograph of an Australian ADR 34/02 legal evaluation test for an automobile seatback frame according to the present invention, and FIG. 11 is a graph for data analysis of the evaluation test of FIG. 10. 12 is a flowchart of a method of manufacturing a seatback frame for a vehicle according to an embodiment of the present invention. 13 is a flowchart of a method of manufacturing a seatback frame for a vehicle according to another embodiment of the present invention.

Definitions of terms used below are as follows. "Horizontal direction" means the transverse direction in the longitudinal direction in the same member, that is, the transverse direction in FIGS. 6 to 10, and "vertical direction" is perpendicular to the longitudinal direction in the same member, that is, in FIGS. 6 to 10 In the vertical direction. In addition, the upper part (upper part) means the upward direction in the "vertical direction", that is, the direction toward upward in Figs. 6 to 10, and the lower part (lower part) in the downward direction in the "vertical direction", that is, in Figs. 6 to 10 It means the downward direction.

An automobile seatback frame 1 according to the present invention will be described with reference to FIGS. 6 to 11. 6 to 10, the seatback frame 1 for a vehicle according to the present invention includes a frame body part 10, a load part 20 or a cutting part 20, and a reinforcement part 30.

The seatback frame 1 for a vehicle according to the present invention shown in FIGS. 6 to 11 may be applied to a SUV vehicle as well as a general vehicle, and may be applied to a front seat that is a row of automobiles as well as a rear seat that is a row of automobiles.

In particular, the seatback frame 1 for a vehicle according to the present invention is more suitable for the seatback frame 1 for an SUV two-row car due to the characteristic that the two-row seat should be folded in the SUV model, but is not necessarily limited thereto, and the seatback for all vehicle types Can be applied to the frame.

The frame body portion 10 forms an outer shape of a seatback frame for automobiles. In addition, the frame body portion 10 is formed in a plate shape of a rectangular shape as a whole.

In addition, the frame body portion 10 is formed of a composite material. In particular, but not necessarily limited to, the frame body 10 is LWRT (low weight reinforced thermoplastics), SMC (sheet molding compound), GMT (glass fiber reinforced thermoplastics), LFT (Long Fiber Thermoplastics), CFRTPC (Continuous Fiber) Reinforced ThermoPlastic Composite) or any two or more of them.

In addition, as shown in FIGS. 6, 7 and 9, the frame body portion 10 according to the present invention may further include a plurality of rib portions 11 and/or a plurality of channel portions 12.

A plurality of ribs 11 are formed horizontally or vertically or radially on the front or rear of the frame body portion to reinforce the strength of the frame body portion 10.

A plurality of channel portions 12 are formed in the horizontal or vertical direction on the front or rear of the frame body portion to reinforce the strength of the frame body portion 10.

Although not necessarily limited to this, the plurality of channel portions 12 are formed in a U shape in cross section. Accordingly, strength reinforcement or manufacturing may be facilitated through the channel portion.

The load portion 20 is a portion of the frame body portion 10 where the load load increases, and the frame body portion 10 is changed according to the overall shape or the portion of the recliner or the number of positions of the rib portion and the channel portion. Can be.

The cutting portion 20 corresponding to the load portion 20 is formed through flesh cutting to reduce elastic deformation of a portion where the load load is concentrated on a part of the frame body portion 10.

The reinforcing portion 30 is fastened to the load portion to increase the energy absorption rate through plastic deformation of the load portion 20.

In addition, the reinforcing portion 30 is coupled to the cutting portion to increase the energy absorption rate through plastic deformation of the cutting portion 20.

That is, the reinforcing portion 30 is formed in a shape corresponding to the load portion or the cutting portion, but is not limited thereto, and is formed in a panel shape having a rectangular shape as a whole.

In addition, the reinforcing portion 30, the frame body portion 10 forms the outer shape of the seatback frame for automobiles. In addition, the frame body portion 10 is formed in a plate shape of a rectangular shape as a whole.

The reinforcing portion 30 is formed of a metal material. In particular, although not necessarily limited thereto, the reinforcing portion 30 is formed of one of steel, aluminum, or a composite thereof. In addition, the reinforcing portion 30 may be formed of various alloys or one metal material, if necessary.

As described above, the frame body portion 10 is a composite material, and the reinforcing portion 30 is formed of a metal material, and the frame body portion 10 and the reinforcing portion 30 are formed in a hybrid form of dissimilar materials.

That is, as shown in FIGS. 10 and 11, the frame body portion is formed of a composite material and a reinforcing portion is made of a metal material, and when the reinforcing portion is fastened to the load portion or the cutting portion, plastic deformation occurs in the load portion or the cutting portion and such plasticity It can be seen from FIGS. 10 and 11 that there is no damage or damage to the surrounding parts by increasing the energy absorption rate through deformation.

Therefore, the seatback frame for automobiles according to the present invention is formed of a metal material, a reinforcement part installed in a load part or a cutting part in which a load load increases in the frame body part, and is made lighter than a seatback frame formed of only a conventional metal material, and is complex It is possible to increase the stiffness quality and the stiffness quality than the seatback frame formed of only the material, and to improve the energy absorption rate through plastic deformation of the load portion or the cutting portion, thereby preventing adverse effects on peripheral parts.

In addition, the seatback frame for a vehicle according to the present invention prevents deterioration of energy absorption while reinforcing stiffness and strength, thereby preventing damage or damage to surrounding parts, thereby reducing the time or cost for replacing the vehicle, thereby finally maintaining the maintenance cost of the vehicle. By reducing overtime, you can avoid wasting money and money.

Moreover, the seatback frame for automobiles according to the present invention maximizes the durability and reliability of each part and the vehicle, improves the reliability of the vehicle, promotes weight reduction and miniaturization of the vehicle, improves the strength and rigidity quality of the seatback frame, As the energy absorption rate increases, it is possible to improve the fuel efficiency, stability, and performance of the vehicle by preventing adverse effects on peripheral parts.

In addition, as shown in Figures 8 to 9, the reinforcement portion 30 of the seatback frame 1 for a vehicle according to the present invention is a bolt-nut, rivet, boss-sk, load portion steel on the load portion or cutting portion After the bracket insert is molded, it is fastened or combined by one of welding methods.

Accordingly, the assembly or installation time of the reinforcing part is reduced while minimizing the additional work process, and the quality of the reinforcing part is prevented from being detached while the reinforcing part is installed in the load part or the cutting part, the quality of the worker is maintained, and the seatback frame is provided. It can maintain durability and reliability while reducing manufacturing cost and manufacturing time.

The method for manufacturing a seatback frame for a vehicle according to the present invention shown in FIGS. 12 to 13 may be applied to a SUV vehicle as well as a general vehicle, and may be applied to a front seat as a row of automobiles as well as a rear seat as a row of automobiles.

In particular, the method of manufacturing a seatback frame for a vehicle according to the present invention is more bonded to the production of a seatback frame for an SUV two-row car due to the characteristic that the two-row seat should be folded in the SUV model, but is not necessarily limited thereto, and the seatback frame for all vehicle models Can be applied to.

A method of manufacturing a seatback frame for a vehicle according to an embodiment of the present invention will be described with reference to FIG. 12. As illustrated in FIG. 12, a method for manufacturing a seatback frame for a vehicle according to an embodiment of the present invention includes a frame body part forming step (S1), a load part analyzing step (S2), and a reinforcement part shape determining step (S3), reinforcement It includes a sub-formation step (S4), a reinforcement part coupling step (S5), and a trimming step (S6).

The frame body is formed of a composite material. The frame body is not limited thereto, but any of low weight reinforced thermoplastics (LWRT), sheet molding compound (SMC), glass fiber reinforced thermoplastics (GMT), long fiber thermoplastics (LFT), and continuous fiber reinforced thermoplastic composite (CFRTPC) It may be formed of one or two or more composites thereof.

After the step of forming the frame body part (S1), the load part in which the load is concentrated in the frame body part is analyzed. As described above, the position and the size of the load portion may be different depending on the shape of the frame body portion or the type and number of ribs and channel portions formed on the frame body portion or the vehicle model. Through the load part analysis step, the position and size of the load part applied to the current frame body part are accurately analyzed.

After the load analysis step (S2), the shape, size, and thickness of the reinforcing portion coupled to the load are determined according to the load analysis. This is to reduce the material cost and manufacturing time by minimizing thickness and size while being able to sufficiently increase the energy absorption rate by being coupled to the load portion.

After the step of determining the shape of the reinforcing part (S3), the reinforcing part having the determined shape is formed of a metal material. Without being limited thereto, the reinforcing portion is formed of one of steel, aluminum, or a composite thereof.

After the step of forming the reinforcement (S4), the reinforcement is coupled to the load. At this time, the reinforcement part is fastened to one of bolt-nut, rivet, boss-sk, and steel bracket inserts in the load part and then fixed by welding.

After the reinforcement joining step (S5), the seatback frame is trimmed to match the final automotive seatback frame.

As described above, the method of manufacturing a seatback frame for an automobile according to the present invention prevents deterioration of energy absorption rate while reinforcing rigidity and strength, thereby preventing damage or damage to surrounding parts, thereby reducing the time or cost for replacing the vehicle. Reduces maintenance cost and time, prevents waste of cost and resources, maximizes durability and reliability of each part and vehicle, improves vehicle reliability, promotes lighter and smaller cars, and strengthens the quality and rigidity of the seatback frame. It is possible to improve the fuel efficiency, stability and performance of the vehicle by improving the quality and preventing adverse effects on peripheral parts as the energy absorption rate increases.

A method of manufacturing a seatback frame for a vehicle according to another embodiment of the present invention will be described with reference to FIG. 13. As shown in FIG. 13, a method for manufacturing a seatback frame for a vehicle according to another embodiment of the present invention includes a load load analysis step (P1), a frame body part forming step (P2), and a cutting part forming step (P3), reinforcement It includes a sub-forming step (P4), the reinforcement coupling step (P5), and trimming step (P6).

Through various tests and result predictions, loads concentrated in the frame body are analyzed in advance. As described above, depending on the shape and number of ribs and channel portions formed in the shape of the frame body portion or the frame body portion, or the type of vehicle, the location or location where the load is concentrated may be different. Load Through the load analysis step, the location and size of the place where the load applied to the frame body of the final form manufactured for each vehicle is concentrated is accurately analyzed.

Load After the load analysis step (P1), the frame body is formed of a composite material. The frame body is not limited thereto, but any of low weight reinforced thermoplastics (LWRT), sheet molding compound (SMC), glass fiber reinforced thermoplastics (GMT), long fiber thermoplastics (LFT), and continuous fiber reinforced thermoplastic composite (CFRTPC) It may be formed of one or two or more composites thereof.

After the frame body part forming step (P2), the cutting part is formed through the flesh cutting in the frame body part according to the load analysis. The cutting portion may be formed through various types of cutting. Through this, plastic deformation of the portion where the load is concentrated can be realized to induce an increase in its own energy absorption rate, thereby eliminating the adverse effect on the surrounding correlated components.

After the cutting part forming step (P3), the reinforcement part is formed of a metal material. Without being limited thereto, the reinforcing portion is formed of one of steel, aluminum, or a composite thereof.

After the step of forming the reinforcing portion (P4), the reinforcing portion is joined to the cutting portion. At this time, the reinforcing part is joined to one of the bolt-nut, rivet, boss-sk, and steel bracket inserts in the cutting part and then welded.

After the reinforcement joining step (P5), the seatback frame is trimmed to match the final seatback frame for the vehicle.

As described above, in the method of manufacturing a seatback frame for a vehicle according to the present invention, the frame main body is formed of a composite material, and the reinforcement part installed in the cutting portion in which the load load is increased among the frame body parts is formed of a metal material to form only the existing metal material. It can be made lighter than the seatback frame, increase the stiffness quality and strength quality than the seatback frame formed only of composite materials, and improve the energy absorption rate through plastic deformation of the load or cutting part, so as to prevent adverse effects on peripheral parts. have.

In the detailed description of the present invention described above, the present invention has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those skilled in the art will appreciate the invention described in the claims below. It will be understood that various modifications and changes may be made to the present invention without departing from the spirit and technical scope. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

1: seatback frame, 10: frame body part,
11: rib portion, 12: channel portion,
20: load portion or cutting portion, 30: reinforcement portion.

Claims (17)

In the car seatback frame,
Frame body part;
A load portion in which a load load increases on a part of the frame body portion; And
And a reinforcing part fastened to the load part to increase the energy absorption rate through plastic deformation of the load part.
According to claim 1,
The frame body portion and the reinforcing portion car seat back frame, characterized in that formed of a different material.
According to claim 2,
The frame body portion is formed of a composite material,
The reinforcing portion is a seatback frame for a vehicle, characterized in that formed of a metal material.
According to claim 3,
The frame body portion is a plurality of ribs formed in the horizontal or vertical direction or radially in the frame body portion to reinforce the strength; seat back frame for a vehicle comprising a.
According to claim 4,
The frame body portion is a plurality of channel portions formed in the horizontal or vertical direction to the frame body portion to reinforce the strength; further comprising a seatback frame for a vehicle.
The method of claim 5,
The reinforcing part is a bolt-nut fastening, rivet fastening, boss-screw fastening on the load part, and a steel bracket insert molded into the load part, and then fastened by one of welding fixing methods.
In the two-row seatback frame for SUV cars,
Frame body part;
A cutting portion formed through cutting to reduce elastic deformation of a portion where a load load is concentrated on a part of the frame body portion; And
And a reinforcing part coupled to the cutting part to increase energy absorption through plastic deformation of the cutting part.
The method of claim 7,
The frame body portion is a plurality of ribs formed in the horizontal or vertical direction or radially in the frame body portion to reinforce the strength; seat back frame for a vehicle comprising a.
The method of claim 8,
The frame body portion is a plurality of channel portions formed in a U-shape in the horizontal or vertical direction to the frame body portion to reinforce the strength; further comprising a seatback frame for a vehicle.
The method of claim 9,
The frame body portion and the reinforcing portion car seat back frame, characterized in that formed of a different material.
The method of claim 10,
The frame body portion is formed of a composite material,
The reinforcing portion is a seatback frame for a vehicle, characterized in that formed of a metal material.
The method of claim 11,
The frame body portion is formed of any one of LWRT, SMC, GMT, LFT, CFRTPC or a composite of two or more thereof,
The reinforcing portion is a seatback frame for automobiles, characterized in that it is formed of any one of steel, aluminum, or a composite thereof.
The method of claim 12,
The reinforcing part is a seat-back frame for a vehicle, characterized in that the bolt-nut coupling, rivet coupling boss-screw coupling, and steel bracket insert molding are applied to the cutting portion and then welded. In the method of manufacturing a seatback frame for automobiles,
Forming a frame body part with a composite material;
Analyzing a load portion in which the load is concentrated in the frame body portion;
Determining the shape, size, and thickness of the reinforcement portion coupled to the load portion according to the load portion analysis;
Forming the reinforcing part having a determined shape with a metal material; And
Method of manufacturing a seat back frame for a vehicle comprising a; step of coupling the reinforcement to the load portion.
The method of claim 14,
After the step of joining the reinforcement,
Trimming the seatback frame to match the final seatback frame for a vehicle; a method for manufacturing a seatback frame for a vehicle, further comprising.
In the method of manufacturing a two-row seatback frame for SUV cars,
Analyzing the load load of the frame body portion;
Forming a frame body part with a composite material;
Forming a cutting part by cutting a portion where the load load is concentrated in the frame body part;
Forming a reinforcement part coupled to the cutting part with a metal material; And
Method of manufacturing a seat back frame for a vehicle comprising a; step of coupling the reinforcement to the cutting portion.
The method of claim 16,
After the step of joining the reinforcement,
Trimming the seatback frame to match the final two-row seatback frame for an SUV car; further comprising a method for manufacturing a seatback frame for a vehicle.

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