JP5585069B2 - Manufacturing method of connecting member - Google Patents

Description

  The present invention relates to a connecting member for connecting machine components via a cylindrical bracket portion and a manufacturing method thereof, and more particularly to a connecting member suitable for weight reduction of a vehicle or the like and a manufacturing method thereof.

  Conventionally, a metal member such as iron or aluminum has been used for a connecting member connected to a machine component such as a suspension arm of a vehicle because it has excellent workability and can obtain a desired rigidity. However, in recent years, the use of a resin material has attracted attention as a material that is lighter than a metal material in order to improve vehicle fuel efficiency from the viewpoint of environmental resistance.

  For example, as such a connecting member, a connecting member manufactured by the following manufacturing method has been proposed (see, for example, Patent Document 1). First, a pair of cylindrical metal brackets are prepared, the brackets are spaced apart, and this arrangement state is maintained. Next, a fiber reinforced resin layer made of glass fiber and matrix resin is wound around the outer peripheral surface of the metal bracket so as to connect the two metal brackets to form a fiber reinforced resin layer. Further, an FRP material is inserted into a space surrounded by the wound fiber reinforced resin material and the pair of metal brackets, and the fiber reinforced resin layer is molded from the outside by hot pressing. Thereby, the connection member containing a resin material can be obtained.

  In addition to this, there are laminated members made of a fiber reinforced resin material having a pair of through holes formed on both sides to form a laminated body, and a connecting member in which a metal bracket is fitted into each of the through holes of the laminated body. It has been proposed (see, for example, Patent Document 2).

JP-A-1-82920 JP-A-4-81310

  By the way, the connection member shown in Patent Document 1 has a structure in which the load in the compression direction of the metal bracket is received by the FRP material disposed between the brackets, and the load in the tensile direction is received by the fiber reinforced resin layer. However, since the FRP material and the fiber reinforced resin layer are separate parts at the time of manufacture, even if they are combined by hot pressing, the reliability of the joint portion is high. Absent. In addition, the FRP material is generally an effective material for the strength in the tensile direction, but is not sufficient for the strength in the compression direction compared to a metal material or the like.

  Furthermore, in the manufacturing method shown in Patent Document 1, a thermosetting resin is used for the matrix resin of the fiber reinforced resin layer (prepreg layer), but in this case, the resin must be cured by a crosslinking effect reaction. , Molding time becomes longer. On the other hand, when a thermoplastic resin is used for the matrix resin, a step of heating (preheating) the thermoplastic resin of the FRP material to a melting temperature (above the softening temperature) is necessary before molding by the above-described hot press. , Productivity is low.

  Similarly, the connecting member described in Patent Document 2 is also a laminated body of fiber reinforced resin material, and receives a load in the compression direction, so the strength in that direction is not sufficient. Moreover, since it is necessary to process a through hole in the sheet | seat which consists of a fiber reinforced resin material, it cannot be said that the yield of material is good.

  The present invention has been made in view of the above-described problems, and the purpose of the present invention is as a connecting member that achieves both tensile strength and compressive strength acting between a pair of brackets, and as such a connecting member, An object of the present invention is to provide a manufacturing method for manufacturing a more reliable connecting member at a low cost while improving productivity.

  In order to solve the above problems, a connecting member according to the present invention includes a metal member including a pair of cylindrical bracket portions and an arm portion that connects the pair of cylindrical bracket portions, and surrounds the metal member. And a fiber reinforced resin material including continuous reinforcing fibers wound around the outer peripheral surface of the cylindrical bracket portion.

  According to the present invention, the compressive load acting between the pair of cylindrical bracket portions can be borne by the arm portion of the metal member that is superior in strength to the fiber reinforced resin material. On the other hand, the tensile load acting between the pair of cylindrical bracket portions can be borne by the fiber reinforced resin material having a higher specific strength than the metal material. In this way, the connecting member can balance the tensile strength and compressive strength acting between the cylindrical bracket portions with a lightweight configuration.

  The “fiber reinforced resin material” as used in the present invention is a composite material composed of continuous reinforcing fibers and a matrix resin impregnated with the continuous reinforcing fibers, and can maintain a predetermined strength together with the reinforcing fibers. If possible, the type is not particularly limited.

  The “continuous reinforcing fiber” in the present invention refers to a continuous fiber for resin reinforcement for reinforcing the mechanical strength of the fiber reinforced resin material. For example, glass fiber, carbon fiber, aramid fiber, alumina fiber, boron Examples thereof include fibers such as fibers, steel fibers, PBO fibers, organic fibers, and high-strength polyethylene fibers. As long as the fibers are continuous in the winding direction, the fibers may be cloth-like fibers instead of thread-like fibers. In the case of a woven fabric, the weaving method may be any of woven structures such as plain weave, twill weave and satin weave. However, in order to obtain a cheaper connecting member, it is more preferably a continuous reinforcing fiber in which fibers are aligned (oriented) in one direction (winding direction).

  The matrix resin may be either a thermoplastic resin or a thermosetting resin, which will be described later, and the type of the matrix resin is not limited. However, in view of the manufacturing aspect, a thermoplastic resin is preferable as will be described later.

  Here, the shape of the outer peripheral surface of the cylindrical bracket portion is not particularly limited as long as the fiber-reinforced resin material can be stably held. The outer peripheral surface of the said cylindrical bracket part of the connection member which concerns on invention is a concave surface.

  According to the present invention, since the fiber reinforced resin material is disposed in the concave space of the cylindrical bracket portion formed by the concave surface, the connecting member can be made compact. The wound fiber reinforced resin material can be reliably held.

  Further, the connecting member according to the present invention is not particularly limited as long as the cylindrical bracket portion and the arm portion are connected, for example, provided with integral molding, welding, and tightening allowance. The connection state by joining etc. can be mentioned. However, as a more preferable aspect, the cylindrical bracket portion and the arm portion of the connecting member according to the present invention are integrally formed. According to the present invention, since the cylindrical bracket portion and the arm portion are integrally formed, it is possible to obtain a metal member that is highly reliable in terms of strength compared to the case where these are manufactured separately and connected.

  Furthermore, it is more preferable that the fiber reinforced resin material of the connecting member according to the present invention is overmolded with a thermoplastic resin. Thereby, fraying etc. of the wound fiber reinforced resin material can be suppressed.

  In this application, the manufacturing method which can manufacture the connecting member mentioned above suitably is also disclosed as this invention. The manufacturing method of the connecting member according to the present invention includes a step of manufacturing a metal member that serves as a pair of cylindrical bracket portions and an arm portion that connects the pair of cylindrical bracket portions, and surrounds the metal member. A winding step of winding a fiber reinforced resin material containing continuous reinforcing fibers on the outer peripheral surface of the cylindrical bracket portion while applying tension in the fiber length direction of the continuous reinforcing fibers. is there.

  According to the present invention, since the manufactured metal member is connected to the cylindrical bracket portion by the arm portion, the member for securing compressive strength between the cylindrical bracket portions (for example, FRP material) It is not necessary to arrange. Thereby, the manufacturing process can be simplified and the molding time can be shortened.

  Since the fiber reinforced resin material is wound while tension is applied in the fiber length direction of the continuous reinforcing fiber, the strength of the obtained connecting member in the tensile direction can be improved. Moreover, since a pair of cylindrical bracket part is being fixed by the arm part, the distance between cylindrical brackets does not fluctuate. Furthermore, by winding the fiber reinforced resin material, almost no waste material is discharged from the excess fiber reinforced resin material. In this way, it is possible to manufacture a connecting member with high accuracy and high reliability in a simple process at low cost.

  As long as the fiber reinforcement can be wound around the metal member in this way, the winding method is not particularly limited. For example, a belt-like fiber reinforced resin material in which continuous reinforcing fibers are aligned in one direction, or a thread-like fiber reinforced resin material (for example, continuous reinforcing fibers in which continuous reinforcing fibers are aligned in one direction and a thread-like matrix resin) The form of the fiber reinforced resin material (prepreg) to be wound is not particularly limited. Also, the outer peripheral surface of the cylindrical bracket portion to be wound is processed into a surface along the axial direction of the cylindrical bracket portion (no irregularities), or processed into a concave or convex shape along this direction, etc. The shape of the outer peripheral surface is not particularly limited.

  However, as a more preferable aspect, in the manufacturing process of the metal member, the outer peripheral surface of the cylindrical bracket portion is processed into a concave surface, and in the winding step, the continuous reinforcing fiber is unidirectional as the fiber reinforced resin material. Wrap the thread-like fiber reinforced resin material that has been aligned. According to the present invention, by making the outer peripheral surface of the cylindrical bracket portion concave, the thread-like fiber reinforced resin material can be wound so as to suitably surround the metal member.

  Further, after the winding step, if the wound fiber reinforced resin does not loosen, the connecting member in the state after the winding step may be used as it is, and the matrix resin of the fiber reinforced resin material may be thermoset. Either a functional resin or a thermoplastic resin may be used. Examples of the thermoplastic resin include nylon resin, polycarbonate resin, polyamide resin, polyolefin resin, acrylic resin, ABS resin, and the like. Examples of the thermosetting resin include vinyl ester resins, epoxy resins, fiber reinforced resins, unsaturated polyester resins, and the like.

  However, in a more preferred embodiment, the matrix resin of the fiber reinforced resin material is a thermoplastic resin, and after the winding step, heating is performed so that the matrix resin is softened. In this way, the softening of the matrix resin by heating fills the gap generated when multiple fiber reinforced resin materials are wound, the voids between the continuous reinforced fibers, etc., and the matrix resin that has softened fills the fiber. A resin material can be obtained.

  In another aspect, the matrix resin of the fiber reinforced resin material is a thermoplastic resin, and the matrix resin softens the metal member around which the fiber reinforced resin material is wound after the winding step. It is more preferable to overmold with a thermoplastic resin.

  According to the present invention, since the wound fiber reinforced resin material is overmolded, the wound state can be reliably maintained. Furthermore, since the matrix resin is softened by the heat of the thermoplastic resin at the time of overmolding, the gaps and voids of the fiber reinforced resin at the time of multiple winding described above can be reduced, and a higher strength connecting member can be obtained. .

  The thermoplastic resin to be overmolded may be either a thermoplastic resin not reinforced with fibers or a thermoplastic resin reinforced with fibers. In addition, it is preferable that the compatibility with the matrix resin is good. For example, the same kind of thermoplastic resin as described above may be selected. More preferably, the softening temperature of the matrix resin is higher than that of the thermoplastic resin to be overmolded. A thermoplastic resin lower than the softening temperature is selected. Thereby, the matrix resin can be softened more easily by the heat of the thermoplastic resin during overmolding.

  Further, in the metal member manufacturing process of the connecting member manufacturing method according to the present invention, it is more preferable to integrally form the cylindrical bracket portion and the arm portion, and this integral molding is, for example, press molding or casting. , Forging or the like.

  According to the present invention, it is possible to obtain a connecting member that can ensure both tensile strength and compressive strength acting between a pair of cylindrical brackets, and further to improve the productivity of a more reliable connecting member. However, it can be manufactured at low cost.

The typical perspective view of the connection member of a first embodiment concerning the present invention. It is sectional drawing of the connection member shown in FIG. 1, (a) is arrow sectional drawing along the AA line of FIG. 1, (b) is arrow sectional drawing along the BB line of FIG. Figure. The typical perspective view of the connection member of a second embodiment concerning the present invention. FIG. 4 is a cross-sectional view of the connecting member shown in FIG. 3, where (a) is a cross-sectional view taken along line AA in FIG. 1, and (b) is a cross-sectional view taken along line BB in FIG. Figure. It is a figure for demonstrating the method for manufacturing suitably the connection member which concerns on 1st embodiment shown in FIG. 1, (a) is a figure for demonstrating the manufacturing process of a metal member, (b) is The figure for demonstrating a winding process, (c) is a figure for demonstrating overmolding. It is a figure for demonstrating the method for manufacturing suitably the connection member which concerns on 2nd embodiment shown in FIG. 3, (a) is a figure for demonstrating the manufacturing process of a metal member, (b) The figure for demonstrating a winding process, (c) is a figure for demonstrating overmolding.

  Hereinafter, the present invention will be described based on two embodiments with reference to the drawings. FIG. 1 is a schematic perspective view of a connecting member according to the first embodiment of the present invention. 2 is a cross-sectional view of the connecting member shown in FIG. 1, wherein (a) is a cross-sectional view taken along line AA in FIG. 1, and (b) is along line BB in FIG. FIG.

  As shown in FIGS. 1 and 2, the connecting member 1 </ b> A according to the present embodiment includes at least a metal member 10 </ b> A and a fiber reinforced resin material 21 </ b> A arranged so as to surround the metal member 10 </ b> A. The metal member 10 </ b> A includes a pair of cylindrical bracket portions 11 </ b> A and 11 </ b> A, and the pair of cylindrical bracket portions 11 </ b> A and 11 </ b> A are connected by an arm portion 12.

  The cylindrical bracket portion 11A is formed with a columnar through hole 13 for connecting to other machine components. The outer peripheral surface 14A of the cylindrical bracket portion 11A is formed with a surface along the axial direction L of the cylindrical bracket portion 11A, and has no irregularities.

  The material of the cylindrical bracket portion 11A and the arm portion 12 constituting the metal member 10A is not particularly limited as long as the compressive strength between the cylindrical bracket portions can be ensured. Metal materials such as steel, aluminum, and magnesium are preferable because they are excellent in workability and have corrosion resistance, and are preferably integrally formed.

  The fiber reinforced resin material 21A is wound around the outer peripheral surface 14A of the cylindrical bracket portion 11A so as to surround the metal member 10A, and the cross-sectional shape with respect to the winding direction is rectangular. The fiber reinforced resin material 21A is composed of a plurality of continuous reinforcing fibers 23 and a matrix resin impregnated with these fibers. The continuous reinforcing fibers 23 are aligned and oriented in a direction (one direction) along the winding direction of the fiber reinforced resin material 21A.

  The material of the continuous reinforcing fiber 23 is, for example, at least one selected from carbon fiber, glass fiber, natural fiber, organic fiber, or metal fiber. For example, the continuous reinforcing fiber 23 may be composed of carbon fiber and glass fiber. Good. The matrix resin is a thermoplastic resin, and is made of, for example, a resin such as PP, PA, or PET, and the type thereof is particularly limited as long as these fibers can be bonded to each other through the matrix resin. Is not to be done.

  Further, a wound body in which the fiber reinforced resin material 21A is wound around the metal member 10A may be used as the connecting member. However, in this embodiment, the wound body is further overmolded with the thermoplastic resin 22. Yes. Thereby, the winding state of 21 A of fiber reinforced resin materials wound can be hold | maintained more reliably. In this embodiment, it is overmolded with a non-fiber reinforced resin, but it may be overmolded with a fiber reinforced resin including the above-described reinforced fibers composed of short fibers or long fibers. Thereby, the strength of the connecting member 1A can be further increased. Moreover, it is desirable that the overmolded thermoplastic resin is a resin that is compatible with the matrix resin constituting the fiber reinforced resin material 21A.

  Such a connecting member 1 </ b> A is connected to another machine component through the through hole 13. The compressive load acting between the pair of cylindrical bracket portions 11A is borne by the arm portion 12 of the metal member 10A, which is superior in compressive strength to the fiber reinforced resin material 21A. On the other hand, the tensile load acting between the pair of bracket portions 11A can be borne by the fiber reinforced resin material 21A having a higher specific strength than the metal material. In this way, the connecting member 1A can achieve both tensile strength and compressive strength acting between the cylindrical bracket portions 11A.

  FIG. 3 is a schematic perspective view of the connecting member according to the second embodiment of the present invention. 4 is a cross-sectional view of the connecting member shown in FIG. 3, where (a) is a cross-sectional view taken along the line AA in FIG. 1, and (b) is along the line BB in FIG. FIG.

  Here, the connecting member 1B according to the second embodiment is compared with the connecting member 1A according to the first embodiment, and the shape of the outer peripheral surface of the bracket portion of the metal member and the winding of the fiber reinforced resin material wound around the shape. Only the state is different. Therefore, the same components as those of the connection member of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 3 and 4, the metal member 10B of the connecting member 1B according to the present embodiment has a shape in which the fiber reinforced resin material 21B is easily wound around the cylindrical bracket portion 11B. Specifically, the outer peripheral surface 14B of the cylindrical bracket portion 11B is a concave surface curved along the axial direction L of the cylindrical bracket portion 11B, and the cylindrical bracket portion 11B has a substantially drum shape. Although the cylindrical bracket part 11B has a drum shape here, it is sufficient that a concave surface is formed at a portion wound around the fiber reinforced resin material 21B, and in particular, its surface shape (the outer shape of the cylindrical bracket part 11B). ) Is not limited.

  The fiber reinforced resin material 21B is wound around the outer peripheral surface 14B of the cylindrical bracket portion 11B so as to surround the metal member 10B, and the cross-sectional shape with respect to the winding direction is a vertically long ellipse.

  Thus, by making the outer peripheral surface 14B concave, the fiber reinforced resin material 21B is wound around the concave portion of the cylindrical bracket portion 11B formed on the concave surface, so that the connecting member 1B can be made compact. Furthermore, the fiber reinforced resin material 21B can be securely held in the cylindrical bracket portion 11B without deviation, and a highly reliable connecting member 1B can be obtained.

  Below, the manufacturing method for manufacturing suitably connecting member 1A, 1B which concerns on two embodiment mentioned above is demonstrated. First, the manufacturing method of 1 A of connection members which concern on 1st embodiment is demonstrated below. FIG. 5 is a diagram for explaining a method for suitably producing the connecting member according to the first embodiment shown in FIG. 1, and (a) is a diagram for explaining a production process of the metal member, (B) is a figure for demonstrating a winding process, (c) is a figure for demonstrating overmolding.

  First, as shown to Fig.5 (a), the manufacturing process of 10 A of metal members is performed. Specifically, a metal member 10A including a pair of cylindrical bracket portions 11A and 11A and an arm portion 12 connecting the pair of cylindrical bracket portions 11A and 11A is manufactured by integral molding. The integral molding is performed by, for example, press molding, casting, forging, or the like. Thereby, 10A of metal members with high reliability can be obtained in an intensity | strength surface. Note that the through hole 13 of the cylindrical bracket portion 11A may be formed by hole forming using a drill or the like after being integrally formed.

  Next, as shown in FIG. 5B, a winding process is performed. Specifically, a strip-shaped fiber reinforced resin material (prepreg) 21a including continuous reinforcing fibers 23 is disposed on the outer peripheral surface 14A of the cylindrical bracket portion 11A so as to surround the metal member 10A, and the fiber length of the continuous reinforcing fibers 23. The wound body 1a is manufactured by wrapping multiple times while applying tension in the direction.

  As described above, the strip-shaped fiber-reinforced resin material 21a is impregnated with the matrix resin of the above-described material in the plurality of continuous reinforcing fibers 23 that are aligned (oriented) along the longitudinal direction (in one direction). (So-called UD material).

  Since the metal member 10A described above is connected to the cylindrical bracket portion 11A by the arm portion 12, it is not necessary to arrange a member for securing the compressive strength between the cylindrical bracket portions 11A and 11A. .

  Since the fiber reinforced resin material 21a is wound while tension is applied in the fiber length direction of the continuous reinforcing fiber 23, the strength in the tensile direction between the obtained bracket portions is improved. Further, since the pair of cylindrical bracket portions 11A and 11A are fixed by the arm portion 12, the distance between the cylindrical bracket portions 11A and 11A does not vary when the belt-shaped fiber reinforced resin material 21a is wound. Further, since the fiber-reinforced resin material 21A of the connecting member 1A is formed by winding the belt-shaped fiber reinforced resin material 21a, the excess waste material of the belt-shaped fiber reinforced resin material 21a is hardly discharged.

  The wound state of the belt-shaped fiber reinforced resin material 21a may be held by, for example, an adhesive, and the wound body 1a may be used as a connecting member. Further, after the winding step, heat treatment may be performed so that the matrix resin of the fiber reinforced resin material 21A of the wound body 1a is softened, and the wound body 1a after the treatment may be used as a connecting member.

  By softening the matrix resin by heating, the softened matrix resin can be filled so as to eliminate gaps generated when the belt-like fiber reinforced resin material 21a is wound in multiple layers. In this way, voids existing in the fiber reinforced resin material 21A can be reduced, and a stronger connection member can be obtained.

  However, in this embodiment, as shown in FIG. 5C, the wound body 1a is overmolded with the thermoplastic resin R. Here, first, the wound body 1a is arranged inside the molding die 50A composed of the upper die 51A and the lower die 52A, and the upper die 51A and the lower die 52A are clamped. In a state where the wound body 1a is arranged and clamped, a space in which the surface of the wound body 1a and the like can be overmolded is formed in the mold 50A (cavity).

  Next, the thermoplastic resin R softened by heating is injected from the resin introduction port 53A of the molding die 50A, and the wound body 1a is overmolded by the thermoplastic resin R, and this is removed to remove the connecting member 1A. obtain. Here, the thermoplastic resin R before injection is heated to a temperature at which the matrix resin of the fiber reinforced resin material 21A is softened in the mold 50A.

  Further, the thermoplastic resin R is selected such that the softening (starting) temperature of the overmolding thermoplastic resin R is higher than the softening (starting) temperature of the matrix resin. For example, examples of the thermoplastic resin R include semi-aromatic nylon, and examples of the matrix resin include 6-nylon. The same kind of thermoplastic resin having different softening temperatures may be used properly.

  In this way, the portion that bears the compressive load resistance is not molded by FRP material as in the prior art, but the arm portion 12 that connects the cylindrical bracket portion 11A bears, thus simplifying the manufacturing process and shortening the molding time. Can be planned.

  Moreover, since the wound body 1a including the wound fiber reinforced resin material 21A is overmolded, the wound state of the fiber reinforced resin material 21A can be reliably maintained. Furthermore, since the matrix resin is softened by the heat of the thermoplastic resin R at the time of overmolding, it is possible to reduce the voids of the fiber reinforced resin material at the time of multiple winding described above, and to obtain a stronger connecting member 1A. it can.

  FIG. 6 is a diagram for explaining a method for suitably producing the connecting member according to the second embodiment shown in FIG. 3, and (a) is a diagram for explaining a production process of the metal member, (B) is a figure for demonstrating a winding process, (c) is a figure for demonstrating overmolding.

  In this embodiment, the metal member manufacturing process and the winding process shown in FIGS. 6A and 6B are different, and the subsequent processes such as overmolding are the same as the processes shown in the first embodiment. Since it is the same process, the detailed description is demonstrated. For example, in FIG. 6C, since the shape of the wound body 1b is only different from that of the first embodiment, A at the end of the code is changed to B, but the same as in the first embodiment. It is a method.

  First, as shown to Fig.6 (a), the manufacturing process of the metal member 10B is performed. Specifically, a metal member 10B including a pair of cylindrical bracket portions 11B and 11B and an arm portion 12 connecting the pair of cylindrical bracket portions 11B and 11B is manufactured by integral molding. At this time, the outer peripheral surface 14B of the cylindrical bracket part 11B is processed into a concave surface curved along the axial direction L of the cylindrical bracket part 11B. The processing of the concave surface may be performed at any time during integral molding or after integral molding. Moreover, the process of the through-hole 13 is the same as that of 1st embodiment.

  Next, as shown in FIG. 6B, a winding process is performed. Specifically, thread-like fiber reinforced resin materials 21b including continuous reinforcing fibers 23 are wound around the outer peripheral surface 14B of the cylindrical bracket portion 11B in a multiple manner so as to surround the metal member 10B. At the time of winding, the wound body 1b can be manufactured by applying tension (pulling forming) in the fiber length direction of the continuous reinforcing fiber 23 of the thread-like fiber reinforced resin material 21b.

  As described above, the thread-like fiber reinforced resin material 21b is impregnated with the matrix resin of the material described above into a plurality of continuous reinforcing fibers 23 aligned (oriented) along the longitudinal direction (in one direction). It is a thing. For example, the fiber-like fiber reinforced resin material 21b can include a mixed spinning of polypropylene resin and glass fiber. This can be exemplified by a roving material known as “Twintex” ®, which is composed of continuous glass filaments and polypropylene filaments that are finely and homogeneously mixed.

  In this way, in addition to the effects shown in the manufacturing method of the first embodiment, the outer peripheral surface 14B of the cylindrical bracket portion 11B is made concave so that the fiber-like fiber reinforced resin material 21b is suitably a metal member. It can be wound so as to surround 10B.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed.

  For example, in this embodiment, overmolding is performed by injection molding, but this may be performed by press molding. Moreover, although the outer peripheral surface of the cylindrical bracket part of 2nd embodiment was made into the concave surface which curved, as long as a fiber reinforced resin material can be wound, it is good also as a rectangular-shaped concave surface.

  1A, 1B: connecting member, 1a, 1b: wound body (connecting member), 10A, 10B: metal member, 11A, 11B: cylindrical bracket portion, 12: arm portion, 13: through hole, 14A, 14B: outer periphery 21A, 21B: Fiber reinforced resin material, 21a: Band-shaped fiber reinforced resin material, 21b: Thread-shaped fiber reinforced resin material, 22: Thermoplastic resin, 23: Continuous reinforced fiber

Claims (3)

A step of manufacturing a metal member comprising a pair of cylindrical bracket portions and an arm portion connecting the pair of cylindrical bracket portions;
A winding step of wrapping a fiber reinforced resin material containing continuous reinforcing fibers around the outer peripheral surface of the cylindrical bracket portion in a multiple manner while applying tension in the fiber length direction of the continuous reinforcing fibers so as to surround the metal member; at least look at including the,
The matrix resin constituting the fiber reinforced resin material is a thermoplastic resin, and after the winding step, the metal member wrapped with the fiber reinforced resin material is overcoated with the thermoplastic resin so that the matrix resin is softened. Mold,
The method for manufacturing a connecting member , wherein the softening temperature of the matrix resin is lower than the softening temperature of the overmolded thermoplastic resin . In the manufacturing process of the metal member, the outer peripheral surface of the cylindrical bracket portion is processed into a concave surface, and in the winding step, the continuous reinforcing fibers are aligned in one direction as the fiber reinforced resin material. The method for manufacturing a connecting member according to claim 1 , wherein a reinforced resin material is wound. In the manufacturing process of the metal member, and the cylindrical bracket unit, method for producing consolidated member according to claim 1 or 2, characterized in that integrally molded with the arm portion.

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