KR20110069234A - Longitudinal support for rolling stock frame and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a longitudinal support for a railroad vehicle bogie frame and a manufacturing method thereof; A plurality of ribs made of fiber-reinforced composite material and a filling material made of a lightweight, easily deformed foam material filling the space between the ribs, and a preform made of reinforcing fibers to secure structural rigidity on the outer surface of the filling material. And longitudinal support for the railroad vehicle bogie frame, characterized in that consisting of a skin formed; Provided is a method of manufacturing a longitudinal support for such a railway vehicle bogie frame.

The filling material constituting the longitudinal support according to the present invention includes a plurality of ribs made of fiber-reinforced composite material for resisting bending load, and further provided with a skin made of a composite material on the outside thereof to ensure safety in terms of structural strength. .

Rolling stock, bogie frames, longitudinal support

Description

Longitudinal support for rolling stock frame and manufacturing method thereof {side beam and the Fabrication method for the railway bogie frame}

The present invention relates to a longitudinal support for a railway vehicle bogie frame and a manufacturing method thereof, and more specifically, to a flexible structure longitudinal support for a railway vehicle bogie frame, such as carbon fiber, glass fiber, aramid fiber, and mixtures thereof. The present invention relates to a longitudinal support for a railroad vehicle bogie frame, and a manufacturing method of such a longitudinal support, which are manufactured using a known material such as fiber, epoxy, polyester, and phenol.

In general, the bogie frame of a railroad car is a part that supports the load of all vehicles except the unloaded weight of the railroad car and is the most closely related to the safe operation of the vehicle.

Such a bogie frame is generally manufactured in the form of a welded structure using a rigid steel material according to the size of the supporting load and the load generated during operation. However, when the metal balance frame is manufactured, the weight is about 1.3 to 2 tons, which is heavy and strong.

Of course, there have been attempts to apply fiber-reinforced composite materials to the balance frame to reduce the weight of the existing balance frame. In this case, the weight can be reduced by 25-50% compared to the existing metal balance frame.

The bogie frame made of such a fiber-reinforced composite material is composed of two side frames and one or more cross beams connecting the longitudinal supports. In particular, the longitudinal support shall bear the bending caused by the vehicle body load in the vertical direction, the torsional load caused by the orbital torsion, and the eccentric load caused by other devices such as dampers.

When the longitudinal support is manufactured in a flexible structure rather than a rigid structure such as the existing metal, the longitudinal support plays the role of a spring at the same time. Therefore, in order to satisfy the durability while allowing various load conditions and deformations, the longitudinal support should be made of a material capable of satisfying both high rigidity and high strength conditions and the manufacturing cost should be low.

In this regard, US Patent US6305297, US6338300 and the like have been presented. In the US patent US6305297, as shown in Figures 1 and 2, the flexible longitudinal longitudinal support is made of a composite material, which hangs the reinforcing fiber on two nails 101 and 102 and rotates at least one circumference around it to make one loop. And polymerize the resin matrix along the fibers.

At this time, the distance (E) between the nail and the nail depends on the load to be applied to the base or longitudinal support of the wheel. The number of turns around the two nails, or thickness (e), depends on the predetermined strength required for the longitudinal support.

Another US Pat. No. 6,383,300 is shown in Figure 3, wherein the longitudinal support 6 is made in the form of at least one interchangeable elastic leaf, which is made of a fiber reinforced composite material impregnated with a resin. It consists of fibers of glass, carbon, other aramids, etc., sandwiched in a matrix based on at least one epoxy or other resin, and consists of a single elastic leaf, with a curved shape being preferred.

By the way, in the case of the prior art by winding the nail and nail between the reinforcing fibers to make a desired thickness and to polymerize the resin therein to produce a longitudinal support, it is made of a composite plate-like flat plate structure. Such a simple plate-like structure is inadequate to support the load of a structure that is subjected to high loads such as a bogie frame.

In addition, it is impossible to modify the direction of the reinforcing fibers in the direction other than the longitudinal direction between the nail and nails, and even if the reinforcing fibers are wound to meet the desired thickness, the impregnated resin may be used to precisely set the desired thickness due to the shrinkage of the resin. It is impossible to match. For this reason, there is a problem that it is difficult to guarantee the reproducibility of the product during mass production.

Therefore, the present invention is to solve this problem, the object is to satisfy the high rigidity and high-strength conditions while allowing various load conditions and deformation, the longitudinal support for the railway vehicle bogie frame capable of mass production with excellent economical and reproducible To provide a method of manufacturing a longitudinal support for the bogie frame such as.

The present invention to solve this technical problem;

Filler made of a plurality of ribs made of a fiber-reinforced composite material and a lightweight, easy-to-deform foam material filling the space between the ribs; It provides a longitudinal support for a railway vehicle bogie frame, characterized in that consisting of; skin formed integrally using a preform made of reinforcing fibers to ensure structural rigidity on the outer surface of the filler.

At this time, it is characterized in that the resin and the cured resin mixed with the curing material on the outer surface of the skin.

In addition, an edge of the rib is further provided with a core, and the space between the rib and the core is filled with the foam material.

In particular, the rib and the core is characterized in that formed integrally.

The ribs and cores are cured by laminating a prepreg, which is semi-cured by impregnating known materials such as epoxy, polyester, and phenol into reinforcing fibers such as carbon fibers, glass fibers, aramid fibers, and mixtures thereof. Or it is characterized in that the composite material cured by injecting a resin into the reinforced fiber preform.

The present invention also provides

A first step of manufacturing a filling material comprising a plurality of ribs made of a fiber-reinforced composite material and a lightweight and easily deformable foam material filling the space between the ribs; A second step of forming a skin by laminating a reinforcing fiber preform on an outer surface of the filler; A third step of installing the skin on the outer surface of the filling material in the mold; A fourth step of mixing a hardening material for promoting hardening with pure resins such as epoxy, polyester, and phenol through an inlet formed at one side of the mold, injecting and flowing into the mold, and then discharging it through the outlet; It also provides a method for manufacturing a longitudinal support for a railway vehicle bogie frame, characterized in that it comprises a; a fifth step of curing the resin impregnated in the skin.

At this time, the fourth step is characterized in that the pure resin and the hardening material is forced suction transported by a pump and mixed to send to the mixer, and then introduced into the inlet of the mold.

In addition, the inlet is provided with a plurality in the mold, the resin mixed in the mixer is characterized in that it is introduced into the plurality of inlet through the distributor.

And, the resin injection pressure in the state that the curing agent of the fourth step is mixed is characterized in that more than 1 atm.

In addition, the fifth step may be cured at room temperature or by heating the mold through a heater.

The filling material constituting the longitudinal support according to the present invention includes a plurality of ribs made of fiber-reinforced composite material for resisting bending load, and further has a skin made of a composite material on the outside thereof, thereby securing safety compared to the conventional one in terms of structural strength. can do.

In addition, since the longitudinal support according to the present invention is manufactured by using a mold manufactured to precise dimensions through CNC machining, the longitudinal longitudinal support of the composite material molded in the mold can accurately satisfy the desired dimensions.

Therefore, since the same mold is used also in terms of reproducibility of the product, it is possible to always produce longitudinal supports of the same quality. In particular, when the filler is prepared, there is also an advantage that can be mass-produced through the resin injection and withdrawal quickly.

Hereinafter, with reference to the accompanying drawings, the longitudinal support for the railroad vehicle bogie frame according to the present invention and its manufacturing method will be understood by the embodiments described in detail.

At this time, Figure 4 is a perspective view showing a composite frame for the vehicle frame to which the longitudinal support is applied according to the invention, Figure 5 is a perspective view showing a filler constituting the longitudinal support according to the present invention, Figure 6 5 is an exploded perspective view illustrating a filler of FIG. 5, and FIG. 7 is a cross-sectional view illustrating various modified examples of the filler constituting the longitudinal support according to the present invention, and FIG. 8 illustrates a process of forming a skin on the longitudinal support of the present invention. 9 is a view illustrating a mold for manufacturing a longitudinal support of the present invention, and FIG. 10 is a view illustrating a state in which a longitudinal machining support of a semi-processed state in which a skin is formed is installed in the mold. 11 is a view showing a process of molding the longitudinal support in accordance with the present invention by the resin transfer method.

According to Figure 4, the railway vehicle composite frame bogie frame (1) to which the longitudinal support for railway vehicle frame 100 according to the present invention is applied is a component supporting the load of the vehicle, carbon fiber, glass fiber, aramid fiber and these It is manufactured by applying a prepreg, which is semi-cured by impregnating a base material such as epoxy, polyester and phenol to the reinforcing fibers such as a mixture of the two, two side frame support (side frame 100) arranged in parallel at a predetermined interval And at least one cross beam 2 connecting the longitudinal support 100 with each other.

The longitudinal support 100 and the transverse support 2 constituting such a railway vehicle bogie frame are made of a fiber reinforced composite material.

5 and 6, the longitudinal support 100 is a plurality of loads made of a composite material cured by injecting a resin into the reinforcing fiber preform (hard) or by injecting a resin into the reinforcing fiber preform (hard) Filler 110 consisting of a support rib 112 and core 114 and a lightweight, easily deformable foam 116 that fills the space between the rib 112 and core 114. In order to secure structural rigidity on the outer surface of the filling material 110, the skin 120 is formed by using a preform 122 made of a composite material such as reinforcing fibers, and a pure resin and a hardening material on the outer surface thereof. It is made by applying in a mixed state.

On the other hand, the filler 110 constituting the longitudinal support 100 may be modified in various forms as shown in FIG. According to this, the filler 110 is formed by integrating the rib 112 and the core 114 to form a space, and fill the space with a foam 116 that is light and easy to deform.

In particular, the rib 112 and the core 114 are manufactured integrally in a cylindrical shape so that a through hole is formed at the center, or the core 114 is integrated with the upper and lower ends of the rib 112 to form the foam material 116 and the rib 112. And it is produced so that the core 114 can be laminated sequentially.

Hereinafter, the manufacturing process of the longitudinal support 100 for the railroad vehicle bogie frame according to the present invention with reference to FIGS. 5 to 11 in detail.

5 and 6, the filling material 110 constituting the longitudinal support 100 made of a fiber-reinforced composite material according to the present invention, it can be made in various forms.

According to this, the filler 110 is laminated with a prepreg, which is semi-cured by impregnating a base material such as epoxy, polyester and phenol into reinforcing fibers such as carbon fiber, glass fiber, aramid fiber, and a mixture thereof. Rib 112 made of a composite material cured by injecting a resin into the cured or reinforced fiber preform, a core 114 for finishing the edge of the rib 112, the rib 112 and the core ( 114 is composed of a lightweight, easily deformable foam 116 that fills the space between.

At this time, the rib 112 and the core 114 constituting the filling material 110 is cured by stacking the prepreg impregnated in the matrix material, or injecting the resin into the reinforcing fiber preform (preform) After curing by hardening it is produced by cutting to the desired size and shape.

In addition, the foam material 116 is composed of a light and easy deformation (foam) to fill the space between the rib 112 and the core 114 made of a composite material.

The thickness, length, width, etc. of the ribs 112, the cores 114, and the foam material 116 constituting the filler 110 may be designed differently according to the load size of the railroad vehicle to which the filling material 110 is applied.

On the other hand, the rib 112 and the core 114 and the foam material 116 made of a composite material constituting the filling material 110 is bonded by using an adhesive to complete the production of the filling material 110.

At this time, looking at the cross section of the filler 110 may be modified to have a cross-sectional structure of various shapes, as shown in Figure 7, these are a plurality of ribs 112 and the core 114 and the foam material 116 The stacked state is maintained.

In addition, the filling material 110 manufactured by integrating the rib 112, the core 114, and the foam material 116 with an adhesive, as shown in FIG. 8, has a reinforcing fiber preform on the outer surface of the filling material 110. 122 is laminated to form a skin 120.

In this case, the skin 120 is wound around the filler 110 to form a longitudinal support 100 in a semi-processed state by winding the reinforcing fiber preform 122 at least once or by stacking one layer by a thickness satisfying the conditions of mechanical rigidity and strength. do.

The skin 120 is stacked to a predetermined thickness, and then inserted into the pre-fabricated mold 200 as shown in FIG. 9.

At this time, the mold 200 is divided into the upper mold 202 and the lower mold 204, and is used to manufacture a longitudinal support 100 made of a fiber-reinforced composite material having a flexible structure by the resin transfer method. Such a mold 200 is produced by a known method of manufacturing the metal through CNC processing or in the form of applying a metal reinforcement to the glass fiber reinforced composite material.

Since the mold 200 transfers the resin at a pressure of 1 atm or more when the longitudinal support 100 is manufactured using the resin transfer method, the mold 200 should not be deformed under such a pressure.

The composite longitudinal supporter 100 having the skin 120 formed on the outer surface of the filler 110 in the mold 200 having the above conditions is installed as shown in FIG. 10. More specifically, the composite longitudinal axis support 100 of the state in which the skin 120 is formed on the outer surface of the filler 110 inside the lower mold 204 is inserted and covers the upper mold 202 and the like bolts and the like. Combining with the fastening means is fixed integrally so that the internal air does not count out.

At this time, before the composite longitudinal axis support 100 is installed in the mold 200, chemical treatment for easily separating the longitudinal axis support 100, which is finally formed on the inner surface of the mold 200, from the mold 200. And the inclusion of a substance are preferred.

In such a state, as shown in FIG. 11, epoxy, polyester, and the like through the inlet 210 formed on one side of the mold in a state in which the composite longitudinal supporter 100 is inserted into the mold 200 and integrally fixed thereto. The hardening material 222 for promoting hardening is mixed with the pure resin 220 such as phenol and injected into the composite longitudinal support 100 to allow the fluid to flow in the mold 200 and exit through the exit port 212. To get out.

To this end, pure resin 220 and the hardening material 222 such as epoxy, polyester, phenol, and the like are forced into the pump 230 and transported to the mixer 232 for mixing.

In this way, the resin in a state in which the curing agent is mixed is guided to the inlet 210 formed at one side of the mold 200 in the mixer 232. In this case, the resin in the state in which the curing agent is mixed to the plurality of inlets 210 is uniform. Dispenser 234 is further provided to make the injection. More specifically, the number and positions of the inlet 210 and the outlet 212 installed in the mold 200 may be installed in one or more in consideration of the shape of the longitudinal support 100 and the resin flow.

Therefore, the resin in a state in which the curing agent is mixed in the mold 200 is distributed through the distributor 234 and injected into the mold 200 through the plurality of injection holes 210. The resin in the state in which the injected curing agent is mixed flows through the skin 120 of the composite longitudinal support 100 and exits through the exit port 212. At this time, the injection pressure of the resin in the state in which the curing agent is mixed is injected at 1 atmosphere or more.

If a predetermined time passes during this process, the resin is evenly infiltrated into the entire skin 120 of the longitudinal longitudinal support 100 of the composite material. The method of curing the resin includes a method of curing at room temperature, a method of heating and curing the upper and lower molds through a heater.

Hereinafter, the manufacturing method of the longitudinal support for the railroad vehicle bogie frame according to the present invention.

A first step of manufacturing a filler 110 made of a light and easy to deform the foam material 116 to fill the space between the plurality of ribs 112 and the ribs 112 made of a fiber-reinforced composite material, and the filler material 110 The second step of forming the skin 120 by laminating the reinforcing fiber preform on the outer surface of the) and the third step of installing the skin 120 on the outer surface of the filler 110 in the mold 200 And, through the inlet 210 formed on one side of the mold 200 mixed with a hardening material for promoting the curing to the pure resin, such as epoxy, polyester, phenol, and put into the mold 200 and flowed out The fourth step of discharging through the sphere 212, and the fifth step of curing the resin impregnated in the skin 120.

Here, the fourth step is to force the suction and transfer the pure resin and the hardener to the pump 230 to send to the mixer 232 to mix, and then to the inlet 210 of the mold 200.

In addition, the resin injection pressure in a state in which the curing agent of the fourth step is mixed is 1 atm or more, and the fifth step is curing at room temperature or by heating the mold 200 through a heater.

Although the preferred embodiment of the present invention has been described above, the scope of the present invention is not limited thereto, and the scope of the present invention extends to the scope of the present invention to be substantially equivalent to the embodiment of the present invention. Various modifications can be made by those skilled in the art without departing from the scope of the present invention.

1 to 3 are diagrams showing bogie frames made of a conventional composite material.

Figure 4 is a perspective view showing a composite material bogie frame for a railway vehicle applied longitudinal support in accordance with the present invention.

5 is a perspective view showing a coupling material constituting the longitudinal support in accordance with the present invention.

FIG. 6 is an exploded perspective view illustrating the filler of FIG. 5.

7 is a cross-sectional view showing various modifications of the filling material constituting the longitudinal support in accordance with the present invention.

8 is a view illustrating a process of forming a skin on the longitudinal support of the present invention.

9 is a view showing a mold for producing a longitudinal support of the present invention.

10 is a view illustrating a state in which a longitudinal support in a semi-processed state in which a skin is formed in the mold is installed.

11 is a view showing a process of molding the longitudinal support in accordance with the present invention by the resin transfer method.

*** Explanation of symbols for main parts of drawing ***

100: longitudinal support 110: filler

112: rib 114: core

116: reward material 120: skin

122: preform 200: mold

210: inlet 212: exit

220: pure resin 222: hardening material

230: pump 232: mixer

234: distributor

Claims (10)

Filler made of a plurality of ribs made of a fiber-reinforced composite material and a lightweight, easy-to-deform foam material filling the space between the ribs; Longitudinal support for railway vehicle bogie frame, characterized in that consisting of; skin formed integrally using a preform made of reinforcing fibers to ensure structural rigidity on the outer surface of the filler. The method of claim 1, Longitudinal support for railway vehicle bogie frame, characterized in that the coating and curing the resin mixed with the curing material on the outer surface of the skin. The method of claim 1, The edge of the rib further comprises a core, the longitudinal support for the railroad vehicle bogie frame, characterized in that filling the space between the rib and the core with the foam material. The method of claim 3, Longitudinal support for railway vehicle bogie frame, characterized in that the rib and the core is formed integrally. The method of claim 3, The ribs and cores are cured or reinforced by laminating a prepreg impregnated with reinforcing fibers such as carbon fibers, glass fibers, aramid fibers, and mixtures thereof and impregnated with a base material such as epoxy, polyester, and phenol. Longitudinal support for railway vehicle bogie frame, characterized in that the composite material cured by injecting a resin into the fiber preform. A first step of manufacturing a filling material comprising a plurality of ribs made of a fiber-reinforced composite material and a lightweight and easily deformable foam material filling the space between the ribs; A second step of forming a skin by laminating a reinforcing fiber preform on an outer surface of the filler; A third step of installing the skin on the outer surface of the filling material in the mold; A fourth step of mixing a hardening material for promoting hardening with pure resins such as epoxy, polyester, and phenol through an inlet formed at one side of the mold, injecting and flowing into the mold, and then discharging it through the outlet; And a fifth step of curing the resin impregnated in the skin. The manufacturing method of a longitudinal support for a railway vehicle bogie frame, comprising: a. The method of claim 6, In the fourth step, the pure resin and the hardened material are forcibly sucked and transported by a pump, mixed and sent to a mixer, and then injected into the inlet of the mold. The method of claim 7, wherein The inlet is provided with a plurality in the mold, the resin mixed in the mixer is a manufacturing method of the longitudinal support for the railcar bogie frame, characterized in that the input to a plurality of inlet via a distributor. The method of claim 6, The resin injection pressure in the state that the curing agent of the fourth step is mixed is at least 1 atm. The method of claim 6, The fifth step is a method for manufacturing a longitudinal support for a railway vehicle bogie frame, characterized in that curing at room temperature or by heating the mold through a heater (heater).

Images