JP2001171561A - Straightening vane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-weighted straightening vane of high rigidity and strength, and excellent in mass-productivity. SOLUTION: This vane has a base plate 12 and a support plate 14 comprising a fiber-reinforced plastic, plural recesses 16 are formed in the support plate, and a lower face of the each recess is joined to the base plate. Since the weight of the vane is brought into about 1/3 compared with a conventional aluminium straightening vane while having the sufficient strength and rigidity, down-force is effectively generated without being accompanied substantially with weight increase when used as a straightening vane for an automobile in particular, so as to enhance power performance of a vehicle. The vane of the present invention is excellent in the mass-productivity and manufactured in a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rectifying plate for controlling the flow of air, and more particularly to a rectifying plate provided at a lower portion of a vehicle for generating an aerodynamic downforce. The present invention relates to a vehicle-mounted rectifying plate used for the purpose of obtaining effective aerodynamic characteristics while having a characteristic.

[0002]

2. Description of the Related Art In an automobile, as shown in FIG. 5, the entire vehicle is regarded as a single wing when viewed from the side, so as to increase the frictional force between the tire and the road surface in order to prevent the tire from spinning. It is desirable to generate a force that presses the vehicle against the ground, a so-called downforce. In order to effectively generate such a downforce, there is a means for improving the air flow velocity on the bottom surface of the vehicle by providing a current plate 10 as shown in FIG. 4 on the bottom surface of the vehicle. Conventionally, such a current plate has been used exclusively for racing vehicles, but has recently been used for general vehicles.

[0003]

In such a current plate, it is essential that the current plate has rigidity in order to sufficiently exert the aerodynamic effect, and has strength against a local damage due to a stepping stone and an impact load at the time of bouncing. . In addition, the current plate is located below the axle, and when the weight is heavy, the mobility of the vehicle is greatly reduced. Therefore, the weight reduction is important for the current plate. Furthermore, since it has been used for general vehicles, it has become necessary to be suitable for mass production. Conventionally, an aluminum plate is mainly used as a current plate, but the weight reduction is not enough,
Further, the degree of freedom in shape and mass productivity are insufficient. Therefore,
Various types of resin flow straightening plates have been studied, but in reality, few have achieved sufficient weight reduction and mass productivity while maintaining sufficient rigidity and strength. The present invention has been made in order to solve the above-mentioned problems, and has as its object to provide a current plate having high rigidity and strength, light weight, and excellent mass productivity.

[0004]

SUMMARY OF THE INVENTION A current plate according to the present invention has a substrate and a support plate made of fiber reinforced plastic. The support plate has a plurality of recesses formed therein, and the lower surface of the recesses and the substrate are joined. It is characterized by doing. At this time, it is desirable that the reinforcing fibers contained in the substrate are long fibers and the reinforcing fibers contained in the support plate are short fibers. It is desirable to use at least carbon fiber as the reinforcing fiber. The current plate of the present invention is particularly suitable for automobiles.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given of a diffuser in which a current plate according to the present invention is mounted on a vehicle bottom surface of an automobile. The current plate of the present invention has at least two layers made of fiber reinforced plastic, that is, for example, as shown in FIGS. Since the substrate 12 is located outside when exposed to a vehicle body or the like and is exposed to the surface, the substrate 12 is basically a smooth flat plate so that turbulence does not occur. It is determined according to the rectification effect and the application location, and the bent shape and the unevenness are appropriately formed according to the purpose and attachment. For example, when mounted on the rear part of the vehicle bottom, as shown in FIG. 1, a notch 18 for allowing a muffler and an exhaust pipe to escape, a bolt hole 19 and the like are formed. Further, fins and the like can be provided as necessary. Therefore, since undesired unevenness as a diffuser is not formed on the substrate, turbulence is unlikely to occur, and the rectifying effect is high. The thickness of the substrate is 0.5 to 3.0
mm is appropriate.

The support plate 14 is also a flat plate like the substrate 12, but it is essential that a plurality of recesses 16, 16,... Are formed. The number, position, and shape of the concave portions are determined by their rigidity, the shape of the mounting position of the vehicle body, and the like.
Therefore, in addition to the case where the long and large concave portions 16 are formed as shown in FIG. 1, for example, as shown in FIG. 3, more small concave portions 20 can be formed. Therefore, the recess 16 is determined as appropriate, but is 20 to 50 m.
A substantially rectangular shape having a size of about mx 70 to 110 mm is suitable. Further, it is not necessary to make all the concave portions the same. For example, an arbitrary concave portion is 30 × 160 mm, and another concave portion is 30 mm.
× 120 mm, and the other concave portion may be 30 × 100 mm. In order to exert a more uniform strength over the entirety, a small recess 2 as shown in FIG.
It is desirable to form more 0s. The thickness of the support plate 14 is suitably 1 to 6 mm. Substrate 12 and support plate 14
As shown in FIG. 2, the lower surface of the concave portion 16, that is, the surface facing the substrate 12 is bonded to the substrate 12, so that the hollow portion 26 is formed and firmly integrated. The joint between the substrate 12 and the support plate 14 is not limited to the concave portion 16, but may be, for example, a peripheral portion 22,
The bonding may be appropriately performed at the deformed portion 24 of the substrate 12 or the like. The distance between the substrate 12 and the support plate 14, that is, the depth of the concave portion 16 is desirably 4 to 18 mm. If it is less than 4 mm, the strength improving effect of the multilayer structure having the substrate 12 and the support plate 14 is small, and if it is more than 18 mm, the overall thickness becomes too thick and interferes with many other parts, etc. This is because a problem occurs.

[0007] Both the substrate 12 and the support plate 14 are made of fiber reinforced plastic. As the matrix resin of the fiber reinforced plastic, unsaturated polyester resin, vinyl ester resin, epoxy resin, phenol resin, polyamide resin, polyimide resin, furan resin, maleimide resin, acrylic resin, etc. can be used. In order to prevent thermal deformation which becomes a problem when used under conditions, it is preferable to use a thermosetting resin as the matrix resin. Further, as the reinforcing fiber contained in the fiber-reinforced plastic, for example, glass fiber, carbon fiber, aramid fiber, polyester fiber, silicon carbide fiber, boron fiber, natural fibers such as pulp, stainless steel fibers and the like can be used. In order to reduce the weight of the current plate and to improve rigidity and impact resistance, it is preferable to use carbon fibers. As carbon fiber, PAN-based,
Both pitch-based and rayon-based carbon fibers can be used. Further, as the reinforcing fiber, a plurality of the above-mentioned various fibers may be used in combination. As the form of the reinforcing fiber in the fiber reinforced plastic, a roving in which a continuous reinforcing fiber bundle was aligned in one direction, a reinforcing fiber cloth which was made by weaving the continuous reinforcing fiber bundle, and cut into about 5 to 100 mm. Chopped strands composed of reinforcing fiber bundles, or chopped strand mats in which chopped strands are dispersed in an indeterminate direction and fixed with a binder can be mentioned.
In order to improve the strength of the current plate in all directions, for example, a plurality of plain weaves, twill weaves, satin weaves, and unidirectional weaves having different orientations are obtained by weaving a continuous reinforcing fiber bundle. The reinforcing fiber cloth obtained by weaving the reinforcing fiber bundle is preferred. However, it is better to use long fibers for the substrate in order to increase the strength. However, since a plurality of recesses 16 must be formed in the support plate 14, it is better to use short fibers than long fibers. Sex is improved. As the rectifying plate, other layers may be appropriately provided in addition to the substrate 12 and the supporting plate 14 described above, without departing from the spirit of the present invention. For example, it is desirable to add a fiber reinforced plastic plate for reinforcement or a metal plate such as aluminum between the substrate 12 and the support plate 14 around the bolt hole 19, the peripheral portion 22, and other places as necessary. . In addition, a protective layer and a decorative layer can be provided as appropriate.

In manufacturing such a current plate, it can be manufactured by manufacturing a substrate and a support plate and then joining them. The method of manufacturing the substrate and the support plate is not particularly limited, and SMC, BMC, or the like can be used. For example, a compression method, a press molding method, or the like can be applied. Another method is a resin transfer method in which a predetermined reinforcing fiber is set in a mold having a cavity having a shape corresponding to a straightening plate, the mold is clamped, and a matrix resin is injected into the cavity and cured. it can. For bonding the substrate and the support plate, a pressure bonding method, an adhesion method, a heat fusion method, or the like can be applied. Therefore, since it is possible to manufacture without using an adhesive, it is possible to improve the production efficiency and reduce the cost, and it is also desirable from the environmental point of view. When using an adhesive, the substrate 1 is used as the adhesive.
There is no particular limitation as long as it is capable of firmly bonding the support plate 2 and the support plate 14;
Epoxy resins, urea resins, urethane resins, acrylic resins and the like are preferred, and acrylic resins are particularly preferred for this application. Further, in addition to bonding, mechanical means such as screws, screws, and rivets may be used together to reinforce the bonding between the substrate 12 and the support plate 14.

The hollow straightening plate of the present invention can be manufactured very easily and has excellent mass productivity, and has extremely high rigidity. In addition, the degree of freedom of the shape is high, and remarkable weight reduction can be achieved.

Although the current plate of the present invention is particularly suitable for a current plate installed in an automobile, it is also used as various current plates for controlling the flow of a liquid such as water in addition to a gas such as air.

[0011]

The present invention will be described below in detail with reference to examples.
You. Example 1 The current plate shown in FIG. 1 was manufactured as follows.
Built. Carbon fiber ("Pyrofil TR50S-12
L "Mitsubishi Rayon Co., Ltd.) 650 g / m
^TwoImpregnated with vinyl ester resin into a plain weave fabric
After, thickened cross sheet molding compound
("QC-8101" manufactured by QUANTUM, containing resin
(Amount of 40% by weight). Preheated to 150 ° C
In a fixed mold, the above-mentioned cross sheet molding
0/90 to the edge of the compound, 2 plies and ± 45
Laminate 2 ply and tighten the mold, 50kg / cm ^TwoAt the pressure of
Holding for 3 minutes, the substrate 12 having an average thickness of 0.75 mm
Molded. However, the periphery 22 has a glass fiber reinforced pre-
Pregs were laminated to have a thickness of 1.5 to 2 mm. On the other hand,
Vinyl on 1-inch glass fiber random mat
Matte resin impregnated with polyester resin
To molding compound (manufactured by QUANTUM)
"QC-8102", resin content 40% by weight)
Was. Gold capable of forming a predetermined recess preheated to 150 ° C.
In the mold, the above mat sheet molding compound
Set and tighten the mold, 50kg / cm^Two3 minutes at pressure
Hold the gap, support the average thickness of the recessed part is 1 mm
Plate 14 was formed. The recess 16 is approximately 30 × 100 to 16
0 mm and a substantially rectangular shape.
It was arranged so as to have an interval of about 80 mm between them. Also,
The depth of the recess 16 was 14 mm. Then, obtained above
A sheet-like hot melt adhesive is placed on the substrate 12 and
The support plate 14 is placed on the substrate, and the substrate 12 and the support plate 14 are added.
It is pressed while heating, and the supporting plate is
Etc., and joined and integrated with the substrate, the approximate outer dimensions are about 1800 ×
A 1200 mm current plate was manufactured. The obtained current plate is 7
kg. It should be noted that the same shape of general aluminum
The weight of the flow plate is about 15 kg.

[Example 2] In a mold preheated to 150 ° C, the cross sheet molding compound used in Example 1 was 2 plies at 0/90 and ± 45 at ± 45 with respect to the edge.
Lay the plies, close the mold, and apply a pressure of 50 kg / cm ² to 3
The substrate was manufactured by holding for a minute. On the other hand, the mat sheet molding compound used in Example 1 was heated at 150 ° C.
Set in a preheated mold, close the mold, 50kg
/ Cm ² for 3 minutes to produce a support plate with concave portions. The obtained substrate and the support plate were set on an adhesive jig, joined by a contact pressure for 15 minutes using an epoxy-based araldite adhesive, and further tightened with stainless steel rivets to produce a rectifying plate of about 7 kg.

Example 3 The current plate shown in FIG. 3 was manufactured. A so-called prepreg sheet pre-cured by impregnating a woven fabric of carbon fiber ("Pyrofil TR50S-12L", Mitsubishi Rayon Co., Ltd.) with a basis weight of 650 g / m ^{2 so} that the epoxy resin becomes 35% by weight and pre-curing. Then, a carbon fiber woven fabric was laminated on the edge in a predetermined mold with 1 ply of 0/90 and 1 ply of ± 45 on the edge, and heated under pressure in an autoclave at 3 atm and 130 ° C. for 1 hour. After curing, the substrate was formed. On the other hand, using the same prepreg sheet, a carbon fiber woven fabric is laminated with 1 ply of 0/90 and 1 ply of ± 45 with respect to the edge, and is autoclaved at 3 atm and 130 ° C. for 1 hour under heat and pressure. Thus, a support plate having the recess 20 was formed. The recess 20 is about 20 × 80
mm. The obtained substrate and supporting plate were joined and integrated in the same manner as in Example 1 to produce a rectifying plate. The weight of this current plate was about 7 kg.

Example 4 A current plate was manufactured in the same manner as in Example 3 except that glass fibers were used instead of carbon fibers. Its weight was about 8 kg.

The current plate of the present embodiment is lighter in weight than conventional aluminum current plates and resin current plates, and was not broken or damaged even when used repeatedly for a long period of time.

[0016]

According to the current plate of the present invention, while having sufficient strength and rigidity, it is approximately one-third lighter than the conventional aluminum current plate. The downforce can be effectively generated with almost no increase in weight, and the power performance of the vehicle can be improved. Moreover, it is easy to manufacture, excellent in mass productivity, and low in cost. In addition, by using carbon fibers as the reinforcing fibers, it is possible to reduce the weight and to increase the rigidity and the impact resistance.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a current plate of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view showing an example of a current plate of the present invention.

FIG. 4 is a bottom view of the vehicle.

FIG. 5 is a side view showing a downforce acting on the vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rectifier plate 12 Substrate 14 Support plate 16 Recess 20 Recess

Claims (4)

[Claims] 1. A substrate comprising a substrate made of fiber reinforced plastic and a support plate, wherein the support plate has a plurality of recesses formed therein,
A current plate, wherein the lower surface of the concave portion and the substrate are joined. 2. The current plate according to claim 1, wherein the reinforcing fibers contained in the substrate are long fibers, and the reinforcing fibers contained in the support plate are short fibers. 3. The current plate according to claim 1, wherein at least carbon fiber is used as the reinforcing fiber. 4. The current plate according to claim 1, wherein the current plate is for an automobile.