KR20240036752A - Manufacturing method and wheels of automobile wheels molded from fiber reinforced composites - Google Patents

Abstract

The present invention discloses a method of manufacturing an automobile wheel molded from a fiber-reinforced composite.
The present invention relates to a rim forming preparation process in which the rim forming surface and hub forming surface of an automobile wheel are formed by assembling an upper mandrel and a lower mandrel; A rim part process in which the first composite material is supplied in a braided state to the rim forming surfaces of the assembled upper and lower mandrels, and then the first composite material is supplied by combining a crosswinder jig to form a rim of a predetermined thickness. ; A hub part in which the upper mandrel is separated after the rim part process and several layers of a knitted second composite material are stacked on the hub forming surface located in the center of the separated lower mandrel, and simultaneously with the hub part forming. A spoke part forming process of forming spokes by stacking several layers of the second composite material in a knitted state on a spoke forming surface between the circumferential surface of the hub and the outer periphery of the rim; After the spoke molding process, a spoke jig is molded at the spoke molding site, the crosswinder jig is separated from the rim molding surface of the wheel, silicone rubber is molded, and an external mold is used to form a gap between the lower mold mandrel and the spoke jig. The forming process is performed sequentially by sealing the rim parts and spoke parts by pressing them upwards and downwards using a predetermined amount of heat and vacuum suction force.

Description

Manufacturing method and wheels of automobile wheels molded from fiber reinforced composites}

The present invention relates to a method of manufacturing an automobile wheel in which a composite material made by infiltrating a liquid synthetic resin such as an epoxy resin into a fiber reinforced material is supplied to a mold and molded using heat and pressure, and an automobile wheel manufactured by the method.

An automobile wheel is a chassis part composed of a disk and a rim. It consists of a rim to which a tire is connected, and a hub disk or hub (hereinafter referred to as a hub) mounted on the axle. It is an important part of the driving system that is essential for the driving of a car. It is one.

These automobile wheels are designed with durability, safety, and design in mind because they are components that receive the primary impact load from the road surface while rotating at high speeds. Generally, after the hub and rim are processed separately, the spokes (spread out radially from the hub) are made. It is manufactured by joining the ribs) to the inner periphery of the rim using arc welding, etc., or by casting, or by stamping using steel.

Meanwhile, rims are manufactured through tubing, trimming, flange expansion, floor forming, and shape correction. Among these processes, the flow forming manufacturing process of the rim involves creating a shape other than a circle in the circumferential direction of the rim. The downside was that it was difficult for designers to design freely.

In addition, conventional automobile wheels were designed by changing their shape and thickness to satisfy structure/durability (stress relief).

However, if the stress imposed on the automobile wheel is alleviated by considering only the thickness, the weight increases, which is disadvantageous for lightweighting. In recent years, when fuel efficiency has become important, there has been a problem of many difficulties in designing considering only the thickness.

Therefore, research on inventions to improve the durability of automobile wheels is required while reducing the weight of automobiles is not a problem. Therefore, automobile wheels (hereinafter referred to as the selected name) were registered with the Korean Intellectual Property Office under Patent Registration No. 10-1949029. there is.

The starting name is a wheel disk connected to the car body and having a plurality of spoke parts; and a wheel rim on which a tire is mounted and coupled on at least three sides with at least one of the spoke portions, wherein the wheel rim includes a rim body portion on which a tire is mounted and an outermost end of the spoke portion coupled to an edge portion. and a bridge portion formed to extend from an edge portion of the rim body portion to the inside of the rim body portion and to which a side end of the spoke portion is coupled. The bridge portion is elastic when the seated side end of the spoke portion is pressed. An elastic clip that is moved outward is provided on the side.

The above preliminary name refers to the wheel for an automobile, which is connected to the automobile body, is equipped with a wheel disk and a tire having a plurality of spoke portions, and is composed of a wheel rim that engages at least one of the spoke portions on at least three sides, thereby forming a wheel disk and a wheel rim. There is an advantage of increasing the bonding force of the wheel disk and the wheel rim even when the wheel disk is coupled to the edge of the wheel rim, but the bonding process is not strong and there are various problems with the manufacturing equipment.

KR Registered Patent No. 10-1949029 (registered on February 11, 2019)

The present invention is a process in which a car wheel is formed using heat and pressure while braiding, crosswinding, and stacking a single material of a fiber-reinforced composite made by infiltrating a liquid synthetic resin such as an epoxy resin into a fiber reinforcement material at the wheel forming site of a mold. The purpose is to simplify the manufacturing of and to maintain performance and reliability against external pressure of automobile wheels formed only from a single material of fiber-reinforced composite.

The present invention relates to a rim forming preparation process in which the rim forming surface and hub forming surface of an automobile wheel are formed by assembling an upper mandrel and a lower mandrel; A rim part in which the first composite material is supplied in a braided state to the rim forming surface of the assembled upper and lower mandrels, and then the first composite material is supplied by combining a crosswinder jig to form a rim of a predetermined thickness. process; A hub part in which the upper mandrel is separated after the rim part process and several layers of a knitted second composite material are stacked on the hub forming surface located in the center of the separated lower mandrel, and simultaneously with the hub part forming. A spoke part forming process of forming spokes by stacking several layers of the second composite material in a knitted state on a spoke forming surface between the circumferential surface of the hub and the outer periphery of the rim; After the spoke forming process, a spoke jig is molded at the spoke molding site, the crosswinder jig is separated from the rim forming surface of the wheel, silicone rubber is molded, and an external mold is used to form a gap between the lower mold mandrel and the spoke jig. The purpose of the present invention is fully achieved by providing a method in which the forming process is performed sequentially by sealing the rim part and spoke parts by pressing them upward and downward using a predetermined amount of heat and vacuum suction force.

In the method of achieving the object of the present invention, the rim part process involves inserting the first composite material into the gap of the crosswinder jig while the crosswinder jig is coupled to the rim forming surface of the rim that is formed to a predetermined thickness. It is desirable to further perform a rim forming process in which the material is supplied through crosswinding to form support ribs with a predetermined thickness on the rim forming surface.

In the configuration in which the object of the present invention is achieved, the rim forming process is such that the crosswinder jig coupled to the rim forming surface is coupled and separated at left and right positions on the rim forming surface, and the crosswinder jig is divided into 2 or 3 pieces. It is formed and separated in two or three directions of the rim forming surface, and the crosswinder jig performs cross winding through a guide groove where a TFP (Table Fiber Placement) material is inserted into the setting position of the rim forming surface. This is desirable.

In the configuration in which the purpose of the present invention is achieved, the spoke forming process is performed when the second composite material is laminated in a knitted state in several layers on the hub part forming surface of the lower mandrel, and the second composite material is stacked in several layers. It is desirable to perform stitching in .

In the configuration in which the object of the present invention is achieved, the spoke forming process includes forming the hub part and the spoke part into several fan-shaped shapes when laminating the hub part and the spoke part with the second composite material in a knitted state. It is desirable to carry out post-combination molding.

In a configuration that achieves the object of the present invention, it is preferable that the first composite material to be braided is converted to carbon fiber in which reinforcing fibers are pre-impregnated with a matrix resin.

In a configuration in which the object of the present invention is achieved, the spoke member is continuously woven in a spoke shape in the circumferential direction of the rim in the hub forming layer in which the second composite material is embroidered at the hub position, and is formed on the circumferential surface of the rim. It is preferable that the outer part in contact with is folded into the rim portion and is fused with the spoke molding layer.

The automobile wheel manufactured according to the manufacturing method of the present invention includes a rim in which a composite material is wound to a predetermined thickness on the rim forming surface of a mandrel mold and then formed into a cylindrical shape by high temperature curing, and a tire is mounted on the rim of the rim. A rim member whose outer periphery is formed; Composite materials with different structures are laminated in a knitted state on the surfaces of the spoke molding surface and the hub molding surface of the mandrel mold and then hardened at high temperature to form a hub member that receives the output of an automobile engine and a rim on the hub circumferential surface of the hub member. A spoke member in which the outer portion of the spoke, which extends radially in length with respect to the inner diameter side and is in contact with the circumferential surface of the rim, is folded and fused with the outer peripheral surface of the rim member, so that the hub and the rim are integrally formed; The purpose of the present invention is achieved by providing a configuration that includes.

In a configuration in which the object of the present invention is achieved, the rim member is formed by winding the first composite material to a predetermined thickness, and the first composite material is further wound on several places on the cylindrical surface of the rim member to form a cylindrical shape of the rim. It is desirable to form ribs that reinforce the external force against.

In a configuration in which the object of the present invention is achieved, the spoke member is formed by laminating the second composite material in a knitted state and dividing the hub and spokes into several fan-shaped blocks on the circular plate of the hub. A configuration that allows each block to be combined and molded is desirable.

According to the present invention, a single material of a fiber-reinforced composite made by infiltrating a liquid synthetic resin such as an epoxy resin into a fiber-reinforced material is braided, cross-winded, and laminated at the wheel forming site of a mold, and an automobile wheel is formed using heat and pressure. It has the advantage of simplifying the manufacturing of automobile wheels.

There is an advantage in maintaining performance and reliability against the external pressure of the car wheel by forming a single material made of fiber-reinforced composite material and forming the overlap structure differently.

Figure 1 is a manufacturing process flow chart of an automobile wheel molded from a fiber-reinforced composite to which the present invention is applied.
Figure 2 is a state diagram of a mold for rim forming during the manufacturing process of the present invention.
Figure 3 is a longitudinal cross-sectional view showing the internal structure of a mold joined for rim forming of Figure 2.
Figure 4 is a molding state diagram of a cross wind jig for forming support ribs after rim forming during the manufacturing process of the present invention.
Figure 5 is a longitudinal cross-sectional view showing a crosswinder jig joined for forming support ribs after forming the rim of Figure 4.
Figure 6 is a perspective and side view of the crosswinder jig during the manufacturing process of the present invention.
Figure 7 is an enlarged cross-sectional view showing a support rib formed on the rim forming surface by the crosswinder jig of the present invention.
Figure 8 is a bottom perspective view of the spoke jig for the spoke wave forming process of the present invention.
Figure 9 (a) (b) is a state diagram showing an embodiment of the spoke part forming process in the present invention.
Figure 10 is a cross-section and stacking example of the fusion state of the rim circumference and spoke ends during the spoke part molding process of the present invention.
11 is a mold state diagram for the forming process of the present invention;
Figure 12 is a mold state diagram inside the mold by the forming process of the present invention;
Figure 13 (a) is a state diagram before mold operation by the forming process, and (b) is a state diagram of the mold operation by the forming process.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention may add, change, or delete other components within the scope of the same spirit, or create other degenerative inventions or this invention. Other embodiments that are included within the scope of the invention can be easily proposed, but this will also be said to be included within the scope of the invention of the present application.

In addition, components having the same function within the scope of the same idea shown in the drawings of each embodiment will be described using the same reference numerals.

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

Figure 1 shows the manufacturing process of an automobile wheel molded from a fiber-reinforced composite to which the present invention is applied.

When explaining the automobile wheel manufacturing process formed with the fiber-reinforced composite material of the present invention, first, a rim forming preparation process (S100) is performed.

The rim forming preparation process (S100) is a process in which the lower mandrel 110 and the upper mandrel 120 for forming the automobile wheel 600 are mutually assembled with a fiber-reinforced composite material, and rim forming is performed on the outer surface of the mandrel mold 100. The face 112 and the rim circumference part face 123 are provided, and the assembled mandrel mold 400 is moved to the braiding equipment side where the composite material is produced.

When the mandrel mold 100 is moved to the braiding equipment and installed, the rim part forming process (S200) is performed.

In the rim part forming process (S200), the first composite material (600A), which is a fiber-reinforced composite produced in a braiding equipment, is formed on the rim forming surface 112 and the rim circumference of the upper and hamen type drums 120 and 110 in the assembled state. Supply is carried out to some side (123).

At this time, the supplied first composite material (600A) is woven by braiding to surround the surface of the rim forming surface 112 and the rim circumferential surface 123, forming the rim part 700. Molding is carried out.

When the rim part 700 is formed to a predetermined thickness by braiding the first composite material 600A, the supply of the first composite material 600A is stopped, and the mandrel mold 100 is braided. As it is separated from the equipment and moved to the crosswinding equipment side and installed, the crosswinder jig (200, 200A, 200B) is formed on the outer surface of the rim part (700) formed in the mandrel mold (100).

Afterwards, in the crosswinder equipment, the first composite material (600A) is supplied through the guide groove 220 of the crosswinder jig (200, 200A, 200B) and wound locally on the surface of the rim part 700 through crosswinding. Molding of the support rib 720, which protrudes thicker than the rim part 700, is performed.

When the rim part forming process (S200) is completed, the assembled upper mandrel 120 and lower mandrel 110 are separated to expose the upper space of the lower mandrel 110.

When the upper space of the lower mandrel 110 is exposed, the spoke forming process (S300) is performed.

The implementation of the spoke forming process (S300) is performed by forming the hub forming surface 114 located in the center of the space when the upper space of the lower mandrel 110 is exposed, and the rim of the rim part 700 from the hub forming surface 114. This results from the supply of the second composite material (600B) in a knitted state to the spoke forming surface (116) connected to the circumferential partial surface (123).

The supply of the second composite material (600B) is done in a knitted state using TFP (Table Fiber Placement) equipment, and the second composite material (600B) in a knitted state is placed on the hub forming surface (114). And, the spoke part 800 is formed by supplying it to the spoke forming surface 116 and stacking the second composite material 600B in a knitted state in several layers until the designed height is formed. A stitch process is performed to bond the layers of each layer of the second composite material 600B.

By stitch transition, the second composite material material (600B) is laminated in a horizontal state and is laminated at the designed height on the hub forming surface 114 and the spoke forming surface 116. The second composite material material is sewn in a vertical state with respect to the laminated surface. Through the structure, interlayer bonding between each layer and reinforcement of the structure with reduced physical properties are achieved, and the narrow, thin and long spokes (830) and the spoke parts (800) that form the hub (810) in a shape where the spokes spread out like a sunflower are formed according to molding. Improvements in structural stability and strength can be expected.

After the spoke forming process (S300), the forming process (S400) is performed.

In the forming process (S400), the spoke jig 300 is placed on the upper part of the lower mandrel 110 and molded to the rim forming surface 112, so that the surface of the second composite material 600B in a laminated knitted state is formed. Pressurized by the spoke jig 300, the circumferential surface 123 and the spoke 830 are connected to form the spoke part 800.

And, in the lower mandrel 110, the crosswinder jig (200, 200A, 200B) molded to the rim forming surface 112 is removed, and then the surface of the rim part 700 formed with the first composite material 600A is removed. After molding the silicone rubber (400) and molding the outer mold (500) to the outside of the lower mandrel (110) and the spoke jig (300), a certain amount of heat energy and vacuum suction force are applied to the inside of the sealed outer mold (500). ensure supply.

Therefore, the molded surface of the rim part 700 and the spoke part 800, which are subjected to heat and vacuum pressure between the lower mandrel 110, the spoke jig 300, and the silicone rubber 400, are compressed at high temperature to form the car wheel 600. This is manufactured.

Afterwards, the release process 500 is performed and the external mold 500 and spoke jig 300 are separated from the lower mold mandrel 110, and when the silicone rubber 400 is separated, a rim made of the first composite material (600A) is formed. The automobile wheel 600, in which the part 700 and the spoke part 800 made of the second composite material 600B are hot-pressed, is separated from the lower mandrel 110 and removed.

After the above-mentioned manufacturing process is carried out sequentially, the automobile wheel molded from fiber-reinforced composite material manufactured by performing a release process in which the manufacturing molds of each molded process are sequentially separated in reverse order is made of only composite material and is integrated into the hub. The strength of the structure where the spokes are fused with the circumferential surface of the rim is intertwined between layers, which reinforces the deterioration of the physical properties of each spoke and improves structural stability.

Figure 2 shows the molded state of the mold for rim forming during the manufacturing process of the present invention, and Figure 3 is a longitudinal cross-sectional view showing the internal structure of the mold molded for rim forming in Figure 2.

The composite yarn (Tow prepreg) selected to manufacture the automobile wheel 600 of the present invention has the characteristic of being used throughout the rim part 700 and spoke part 800 that constitute the automobile wheel 600.

This fiber-reinforced composite material yarn is produced through a braiding device in the rim part forming process (S200) and supplied to the rim forming surface 112, the first composite material (600A), and the spoke part forming process (S300). The second composite material (600B) applied is composed of a structure impregnated with resin during the production process, so it has the characteristic of not requiring a separate impregnation process.

The composite material yarn (Tow prepreg) used is a material whose performance and reliability have been sufficiently proven and is used in the manufacture of rocket motor cases and pressure vessels. Therefore, when applied to the rim and spoke of a car wheel, it may change depending on the flatness of the road when driving the car. It can sufficiently withstand various impacts that occur.

The first composite material (600A) is produced by combining the upper and lower mandrels (120, 110) and impregnating the resin by mounting the mandrel mold (100) with the rim forming surface (112) on the braiding device. When supplied to the rim forming surface 112, the rim part 700 is formed by supplying it through a weaving process.

In this way, the first composite material 600A, which is the composite material yarn, is supplied through the process of being woven on the rim forming surface 112, so that when the rim part 700 is formed, the entire preform layer stacking, shape stability, In consideration of distortion reinforcement, it is desirable to manufacture the rim part 700 so that its thickness is 10 to 17 mm.

Through the rim part forming process (S200), the rim forming surface 112 of the upper and lower mandrels 120 and 110 is formed on the edge of the cylindrical rim part 700 made of the first composite material (600A) with a diameter of the rim part. The rim circumferential surface 123 is integrally formed with a larger diameter.

Figure 4 shows the molding state of the crosswinder jig for forming the support rib after rim forming during the manufacturing process of the present invention, and Figure 5 shows the inside of the mold where the crosswinder jig is molded for forming the support rib after rim forming in Figure 4. Shows a longitudinal cross section showing the structure.

In addition, Figure 6 is a perspective view of the crosswinder jig during the manufacturing process of the present invention, and Figure 7 shows an enlarged cross-section of a support rib formed on the rim forming surface by the crosswinder jig of the present invention.

TFP (Table Fiber Placement) material is supplied by separating the mandrel mold 100 from the braiding device in which the composite material yarn (Tow prepreg) is wound to a predetermined thickness on the rim forming surface 112 through the braiding device. Move it to the cross winding machine.

With the mandrel mold 100 mounted on the cross winding machine, the TFP (Table Fiber Placement) material is locally wound at the set position of the rim forming surface 112, so that the set position is thicker than the thickness of the rim 710, which is cylindrical. It is desirable to form accurate dimensions as it affects the structural stress, rim thickness, rim structural shape stacking, and external force (rotation) reinforcement.

Therefore, in a state where the crosswinder jigs (200, 200A, 200B) are molded to surround the outer surface of the rim part 700 woven on the rim forming surface 112, the crosswinder jig (200, 200A, 200B) 1 When the composite material (600A) is supplied and wrapped around the local tooth, it is desirable to form the support rib (720) by wrapping it so that it protrudes further from the surface of the rim (710) to a height of 5 to 9 mm.

The crosswinder jigs (200, 200A, 200B) are divided into 2 or 3 pieces and are coupled and separated in 2 or 3 directions of the rim forming surface 112 of the lower mandrel 110, and the crosswinder jigs 200, 200 A, 200B) is provided with a guide groove 220 that guides it to be supplied to the setting position of the rim forming surface 112, so that the TFP (Table Fiber Placement) material 600A, which is the first composite material, is guided to the guide groove 220. It is supplied in a cross-winding state to the rim forming surface 112, and a support rib 720 with a thickness greater than the thickness of the rim part is formed to protrude.

In this way, the first composite material, TFP (Table Fiber Placement) material 600A, is placed on the surface of the rim part 700 through the guidance grooves 220 formed in the crosswinder jig (200, 200A, 200B) at a local location. By forming the support ribs 720 wound to a height, the rim 710 is structurally strengthened by external forces (rotation) and has accurate design dimensions.

It is preferable that the first composite material to be braided is carbon fiber in which reinforcing fibers are pre-impregnated with a matrix resin.

Figure 8 shows the bottom state of the spoke jig for the spoke part forming process in the present invention, and Figure 9 (a) (b) shows an example state of the spoke part forming process in the present invention.

In the spoke forming process (S300) performed after the rim part forming process (S200), the structure of the first composite material (600A) is different on the hub forming surface (114) provided in the upper space of the lower mandrel (110). The formed second composite material (600B) is laminated in a knitted state.

When working to stack the second composite material (600B) in a knitted state, the second composite material (600B) is stacked in several layers until a predetermined thickness is formed, and then the laminated material (600B) is stacked in several layers. 2. Stitch the composite material (600B) to make the laminated state integrated and fixed at the same time.

The hub 810 of the automobile wheel 100 has a disk shape, and the spokes 830 are radial from the hub 810, that is, in a sunflower shape, and are knitted on the hub forming surface 114 of the lower mandrel 110. The hub 810 is formed by covering the second composite material (600B), and the spoke molding surface (114) connected to the hub molding surface (114) in a sunflower shape is also covered with the second composite material (600B) in a knitted state to form spokes. While the part 800 is formed, the second composite material 600B in a knitted state is stacked one by one overlapping each other and joined until the designed dimensions are reached.

Figure 10 shows a cross-sectional and laminated example of the fusion state of the rim circumference and the spoke end during the spoke part forming process of the present invention.

In this spoke part forming process (S300), the second composite material (600B) is laminated one by one in a knitting state on the spoke forming surface (116) in the shape of a sunflower and formed into embroidery. The end of the spoke part (800) is formed. Since the second composite material (600B) of the part overlaps the rim circumference part surface 123, the overlapping part is folded to the rim 710 so that the spoke part 800 is on the circumferential surface of the rim 710. Let it be fused to (730).

In performing this spoke part forming process (S300), the spokes 830 in the hub 810 are integrated into a sunflower shape, that is, in a radial shape, so that the second composite material 600B in a knitted form is placed at the designed height. The method of forming the spoke part 800 by stacking can be applied as an embodiment for convenience of work and efficient forming in the process of forming the hub 810 and the spoke 830.

[Example]

Since the hub 810 and spoke 830 connected to the rim 710 are cylindrical, the cylindrical rim 710, disk-shaped hub 810, and radial spoke-shaped spoke 830 are shown in Figure 9(a) ( As shown in b), the second composite material (600B) is laminated to the designed dimensions on each fan-shaped block (800n) in a state where it is separated into several blocks, and each fan-shaped block is made into several pieces. The automobile wheel 600 can be manufactured through the spoke part forming process (S300) that combines (800n).

Figure 11 shows the mold state for the forming process of the present invention, Figure 12 shows the mold state inside the mold by the forming process of the present invention, Figure 13(a) is the state before the mold operation by the forming process, ( b) indicates the mold operation state due to the forming process.

After the spoke part forming process (S300), the crosswinder jigs (200, 200A, 200B) in close contact with the rim part 700 formed on the rim forming surface 112 of the lower mandrel 110 are separated and the silicone rubber ( 400), and the spoke jig 300 is coupled to the spoke molding surface 116, and then the outer mold 500 is covered to secure the spoke jig 300 and the silicone rubber 400 so that they are mounted on the press mold.

In the structure where the external mold 500 is combined, heat is provided only to the spoke jig 300 during molding, and the inner surface of the rim part 700 is sealed by silicone rubber 400 to form the rim part 700. Since it is desirable for the space to be in a vacuum state, the silicone rubber 400 is compressed with the vacuum created by removing the air inside the lower mandrel 110 by a compressor, and the surface of the rim part 700 to be molded is compressed with vacuum pressure. The hub forming surface 114 and the spoke forming surface 116, which are hardened under pressure and formed by heat applied to the mold, are fused.

The automobile wheel manufactured by the above method is formed by forming the first composite material (600A), which is a composite material, on the rim forming surface 112 of the mandrel mold 100 to a predetermined thickness and then forming it into a cylindrical shape by high temperature curing. A rim 710 formed of a rim 710, and a rim part 700 formed of a rim circumferential surface 123 on which a tire is mounted on the rim of the rim 710; Composite materials with different structures are laminated in a knitted state on the surfaces of the hub molding surface 114 and the spoke molding surface 116 of the mandrel mold 100 and then hardened at a high temperature to form a hub 810 that receives the output of the automobile engine. ) and the outer portion of the spoke 830, which extends radially from the hub circumferential surface to the inner diameter side of the rim 710 and is in contact with the circumferential surface 730 of the rim 710, is of the rim part 700. A spoke part 800 that is folded and fused to the circumferential surface 730 so that the hub 810 and the rim 710 are integrally formed; An automobile wheel molded from a fiber-reinforced composite comprising a is provided.

The rim part 700 is formed by further wrapping the first composite material 600A on several places on the cylindrical surface of the rim part 700, which is formed by winding the first composite material 600A to a predetermined thickness. It is desirable to provide external force reinforcement to the cylindrical shape of the rim 710 by the support rib 720.

The spoke part 800 is formed by stacking the second composite material 600B in a knitted state on the hub forming surface 114 and the spoke forming surface 116 and integrally formed by stitching. ) is preferably divided into several fan-shaped blocks 800n and molded to form the spoke part 800 by combining each block.

In addition, when the second composite material 600B is formed by laminating it on the hub forming surface 114 and the spoke forming surface 116 in a knitted state, the ends of the spokes 830 are aligned with the circumferential surface 730 of the rim 710. ) It is desirable to bond the layers together in a state of mutual entanglement.

Although the embodiments have been described as above, the present invention is not limited to the above embodiments and can be manufactured in various different forms, and those of ordinary skill in the art to which the present invention pertains will not understand the technical idea or essential elements of the present invention. It will be understood that the present invention may be implemented in other specific forms without changing its features.

Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive.

S100: Rim forming preparation process S200: Rim part forming process
S300: Spoke part forming process S400: Forming process
S500: Mold release process
100: Mandrel mold 110: Lower type mandrel
112: Rim forming surface 115: Spoke forming surface
120: Upper type mandrel 123: Limwonju part-myeon
200, 200A, 200B: Cross winding jig 220: Guide groove
300: Spoke jig 400: Silicone rubber
500: External mold 600: Car wheel
600A: First composite material 600B: Second composite material
700: Rim part 710: Rim
720: Support rib 730: Circumferential surface
800: spoke part 810: hub
830: spoke

Claims (10)

A rim forming preparation process in which the rim forming surface and hub forming surface of an automobile wheel are formed by assembling the upper and lower mandrels;
Rim part forming in which the first composite material is supplied in a braided state to the rim forming surfaces of the assembled upper and lower mandrels, and the first composite material is supplied by attaching a crosswinder jig to the outer surface of the formed rim part. A rim part forming process in which support ribs of a predetermined thickness are formed;
A hub part in which the upper mandrel is separated after the rim part forming process and a second composite material in a knitted state is stacked in several layers on the hub forming surface located in the center of the separated lower mandrel, and the hub part forming process At the same time, a spoke part forming process of forming spokes by stacking several layers of the second composite material in a knitted state on a spoke forming surface between the circumferential surface of the hub and the outer periphery of the rim;
After the spoke part forming process, a spoke jig is molded into the spoke molding position, the crosswinder jig is separated from the rim molding surface of the wheel, silicone rubber is molded, and a gap is formed between the lower mold mandrel and the spoke jig using an external mold. A method of manufacturing an automobile wheel made of fiber-reinforced composite material in which a forming process is sequentially performed in which the rim parts and spoke parts are pressed and molded upward and downward using a predetermined amount of heat and vacuum suction force. According to paragraph 1,
The rim part process is,
In a state where a crosswinder jig is coupled to the rim forming surface of the rim that is formed to a predetermined thickness, the first composite material is supplied through crosswinding through the gap of the crosswinder jig to form a predetermined thickness on the rim forming surface. A method of manufacturing an automobile wheel molded from a fiber-reinforced composite material, characterized in that a support rib process is further performed to form the support rib. According to clause 2,
The rim forming process is,
The crosswinder jig coupled to the rim forming surface is coupled and separated at the left and right positions of the rim forming surface.
The crosswinder jig is divided into 2 or 3 pieces and joined in 2 or 3 directions on the rim forming surface,
Molded from a fiber-reinforced composite material, characterized in that the first composite material, TFP (Table Fiber Placement) material, is cross-winded at a predetermined height at a set position on the rim part surface through a gap provided in the crosswinder jig. Manufacturing method of automobile wheels. According to paragraph 1,
The spoke part forming process is,
When the second composite material is laminated in several layers in a knitted state on the hub part molding surface of the lower mandrel,
A method of manufacturing an automobile wheel molded from a fiber-reinforced composite material, characterized by stitching a second composite material material that is laminated in multiple layers. According to paragraph 1,
The spoke part forming process is,
When laminating the hub part and the spoke part with the second composite material in a knitted state,
A method of manufacturing an automobile wheel molded from a fiber-reinforced composite material, characterized in that the hub part and the spoke part are split and molded into several fan-shaped shapes and then combined molded. According to paragraph 1,
A method of manufacturing an automobile wheel molded from a fiber-reinforced composite, wherein the first composite material to be braided is carbon fiber in which the reinforcing fiber is pre-impregnated with a matrix resin. According to paragraph 1,
The spoke member is,
The second composite material is continuously woven in a spoke shape in the circumferential direction of the rim in the hub forming layer in which the second composite material is embroidered at the hub position, and the outer portion in contact with the circumferential surface of the rim is laminated in a state of interweaving with each other. A method of manufacturing an automobile wheel molded from a fiber-reinforced composite material, characterized in that it is folded and fused with a spoke molding layer. The automobile wheel manufactured according to the manufacturing method of any one of claims 1 to 6,
A rim in which a composite material is wound to a predetermined thickness on the rim forming surface of a mandrel mold and then molded into a cylindrical shape by high-temperature curing, and a rim part in which an outer periphery of the tire is mounted on the rim of the rim is formed;
A hub part that receives the output of an automobile engine after composite materials with different structures are laminated to a predetermined thickness in a knitted state on the surfaces of the spoke molding surface and the hub molding surface of the mandrel mold and then hardened at a high temperature.
The outer portion of the spoke, which extends radially from the hub circumferential surface of the hub part and is in contact with the circumferential surface of the rim, is folded and fused to the outer circumferential surface of the rim part, so that the hub and the rim are formed as one piece. spoke parts; An automobile wheel molded from a fiber-reinforced composite material including. According to clause 8,
The rim part is
The first composite material is wound so as to protrude locally on several surfaces of the rim part formed by woven with the first composite material to a predetermined thickness, thereby providing external force reinforcement to the cylindrical shape by having a thickness thicker than the thickness of the rim. An automobile wheel molded from fiber-reinforced composite material, characterized in that support ribs are formed. According to clause 8,
The spoke part is,
The second composite material is laminated in a knitted state and the spoke part, which is formed as a hub and spoke, is divided into several fan-shaped blocks, and each block is formed by combining the fiber-reinforced composite material. Car wheel.