JP6572817B2 - Tank manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a tank.

  In the fuel cell system, a high-pressure gas tank that stores hydrogen gas as a fuel gas is used. The high-pressure gas tank is manufactured by a filament winding method (hereinafter referred to as “FW method”). In the FW method, a reinforcing fiber impregnated with a thermosetting resin is wound around the outer peripheral surface of a resin liner, and the thermosetting resin contained in the reinforcing fiber is heated and cured to form a fiber reinforced resin layer. Form. The reinforcing fiber is wound around the outer peripheral surface of the liner by fixing the liner to a horizontally supported shaft member (core mold) in a rotatable manner, and winding the reinforcing fiber while rotating the liner. Patent Document 1 discloses a method in which one end portion of a shaft member is driven and the other end portion is pressed against a core pushing base to rotate the liner and heat cure the reinforcing fibers.

JP-A-60-63135

  However, in the tank manufacturing method described in Patent Document 1, since the liner is rotated by driving only one end of the shaft member, the force concentrates on the drive-side end of the shaft member, and the other Less force is applied to the end on the side. For this reason, there is a problem in that the force applied to the liner becomes unbalanced at both ends, causing the liner to bend and twist. In addition, there is a problem that the liner is deflected by the tension applied to the fiber when the fiber is wound around the liner. Such a problem is not limited to a high-pressure gas tank for a fuel cell system, but is common to tanks used for other arbitrary applications and tanks for storing arbitrary fluids. Therefore, a technique for suppressing the deformation of the liner when the fiber is wound is desired.

SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms.
[Mode 1] A tank manufacturing method includes: (a) a shaft member attached to each end of the tank liner; and a chuck into which the shaft member is inserted to fix the shaft member. fitted into the body portion and the inner peripheral diameter larger body portion moves away from the end, with a chuck and a tapered portion the outer periphery diameter increases with distance from the end of the liner, before Kira A step of holding the both ends of the liner along the axis so that the liner is rotatable about the axis as a central axis; and (b) using the two shaft members fixed to the chuck, the axis along the axis. A step of rotating the liner in conjunction with the shaft member while pulling both ends of the liner in a direction in which both ends of the liner are separated; and (c) fiber is fed to the liner rotating with the shaft member according to (b). And a step to put wood,.
According to the method of manufacturing a tank of this embodiment, the shaft member attached to both ends of the liner, and the chuck for fixing the shaft member, the body and the body having an inner peripheral diameter that increases as the distance from the end of the liner increases. And a chuck that includes a tapered portion that increases in outer diameter as it moves away from the end of the liner, and the liner rotatably holds both ends along the liner axis. By functioning as a wedge, a force toward the central axis of the liner can be applied to the shaft member, and the shaft member can be gripped more firmly. In addition, when the fiber is wound around the outer peripheral surface of the liner, the liner is rotated in conjunction with the shaft member while pulling both ends of the liner in a direction in which both ends of the liner are separated using the shaft member fixed to the chuck. The force along the axis and the force in the rotational direction can be transmitted to the shaft member at the same time, suppressing the concentration of the driving force on one end of the liner, and deforming the liner such as bending and twisting Can be prevented from occurring. For this reason, the fiber can be wound around the outer peripheral surface of the liner with high accuracy.
[Mode 2] The tank manufacturing apparatus is a holding device having shaft members respectively attached to both end portions along the axis of the tank liner, and a chuck for fixing the shaft member. The liner has a holding device that rotatably holds the liner, and the chuck is a body portion into which one end portion of the shaft member is inserted, and the inner peripheral diameter increases as the distance from the end portion of the liner increases. And a taper portion having a cylindrical wedge shape that fits into the body portion, and has a taper portion whose outer diameter increases as the distance from the end of the liner increases.
According to the tank manufacturing apparatus of this aspect, the chuck has a barrel portion whose inner diameter increases as it moves away from the end portion of the liner, and a cylindrical wedge shape that fits into the barrel portion. Since the outer peripheral diameter increases with distance from the portion, the tapered portion functions as a wedge, so that a force toward the central axis of the liner can be applied to the shaft member. For this reason, a shaft member can be grasped more firmly. Also, when rotating the liner while pulling both ends of the liner in a direction that separates both ends of the liner using a shaft member, it is possible to prevent the driving force from concentrating on one end of the liner, and to deflect or twist the liner. It is possible to further suppress the occurrence of such deformation.

(1) According to one embodiment of the present invention, a method for manufacturing a tank is provided. In this manufacturing method, (a) a shaft member is used to hold both ends of the tank liner along the axis line so that the liner is rotatable about the axis line; and (b) the shaft member. And (c) rotating together with the shaft member according to (b); and (c) rotating the both sides of the shaft member while pulling the outer side of the liner along the axis. Winding the fiber around the liner;
According to the manufacturing method of this aspect, when the fiber is wound around the outer peripheral surface of the liner, the shaft member that holds both ends along the axis of the liner is pulled to the outside of both ends of the liner along the axis. Since both sides of the liner are rotationally driven around the axis as the central axis, the force along the axis and the force along the rotational direction can be transmitted to the shaft member at the same time, and the driving force is applied to one end of the liner. It is possible to suppress the occurrence of deformation such as deflection and torsion in the liner. For this reason, the fiber can be wound around the outer peripheral surface of the liner with high accuracy.

  The present invention can be realized in various forms. For example, it can be realized in the form of a method of winding a fiber around a tank or a tank manufacturing apparatus.

It is process drawing which shows the manufacturing method of the tank in one Embodiment of this invention. It is sectional drawing which shows an example of the liner prepared by a preparatory process. It is explanatory drawing which shows schematic structure of a holding | maintenance apparatus. It is sectional drawing which shows a mode that the shaft member is being fixed with the chuck | zipper. It is a disassembled perspective view which shows the structure of a chuck | zipper.

A. Embodiment:
FIG. 1 is a process diagram showing a tank manufacturing method according to an embodiment of the present invention. The tank manufactured by the manufacturing method of the present embodiment has a configuration in which reinforcing fibers are wound around a substantially cylindrical container-shaped tank liner (liner 10 described later). Such a tank is used for storing hydrogen gas as fuel gas in a fuel cell system. As shown in FIG. 1, a preparation process is first performed (process P105). In the preparation step (step P105), devices and materials necessary for manufacturing the above-described liner and tanks such as reinforcing fibers are prepared. In the present embodiment, carbon fibers impregnated with a thermosetting resin in advance are used as the reinforcing fibers. The thermosetting resin impregnated in the carbon fiber is an arbitrary resin having thermosetting properties such as an epoxy resin, a polyester resin, and a polyamide resin. In addition to these resins, glass fibers and aramid fibers may be included for the purpose of reinforcing the carbon fibers.

  FIG. 2 is a cross-sectional view showing an example of a liner prepared in the preparation process (process P105). The liner 10 includes a main body portion 20 and two base portions 30. The main body 20 is a resin container having a high gas barrier property. The main body 20 is made of, for example, a resin such as polyamide, ethylene vinyl alcohol copolymer, or polyethylene. In addition, it may replace with resin and may be formed with metals, such as an aluminum alloy. The main body portion 20 includes a substantially cylindrical cylinder portion 21 and two dome portions 22 having a convex curved surface disposed with the cylinder portion 21 interposed therebetween. In FIG. 2, the central axis CX represents the central axis of the cylinder portion 21. In other words, it can be said that the central axis CX is also the central axis of the liner 10.

  The two base parts 30 are each attached to the apex part of the dome part 22. As shown in FIG. 2, the cap portion 30 is attached to both ends of the liner 10 in the longitudinal direction (the direction along the central axis CX of the liner 10). The base part 30 is attached so that the central axis of the base part 30 and the central axis CX of the liner 10 coincide. The base portion 30 communicates with the inside of the liner 10, and a shaft member (a shaft member 210 described later) is inserted in a liner holding step described later. In addition, when a tank manufactured by the tank manufacturing method according to the present embodiment is used in a fuel cell system, a pipe for supplying hydrogen gas is connected to the base part 30.

  As shown in FIG. 1, when the preparation process (process P105) is completed, a liner holding process is performed (process P110). In the liner holding step (step P110), the liner 10 is attached to a holding device (a holding device 200 described later), and the liner 10 is held.

  FIG. 3 is an explanatory diagram showing a schematic configuration of the holding device 200. FIG. 3 shows a state after execution of the liner holding process (process P110). In FIG. 3, for convenience of explanation, the liner 10 is represented by a cross section as in FIG. 2. In the liner holding process, both ends of the liner 10 along the central axis CX are held by the pair of holding devices 200. Each holding device 200 includes a shaft member 210, a chuck 220, and a motor 230. In addition, since a pair of holding | maintenance apparatus 200 has the mutually same structure, it attaches | subjects the mutually same code | symbol. The shaft member 210 is used for holding the liner 10. In addition, it is also used as a support shaft when the liner 10 is rotated about the central axis CX as an axis in a rotation driving process described later. The shaft member 210 has a rod-like appearance, one end is inserted into the base portion 30 of the liner 10, and the other end is fixed by a chuck 220. At this time, the shaft member 210 holds the liner 10 so that the liner 10 can rotate in the rotation direction R about the central axis CX. For this reason, when the shaft member 210 rotates, the liner 10 rotates around the central axis CX in conjunction with the shaft member 210. In FIG. 3, the X axis and the Y axis are parallel to the horizontal plane, and the Z axis is parallel to the vertical direction. The + Z direction indicates a vertically upward direction, and the −Z direction indicates a vertically downward direction. The central axis CX is parallel to the X axis.

  The chuck 220 is a metal fixing jig for fixing the shaft member 210. In the present embodiment, the chuck 220 is configured as a collet chuck. The shaft member 210 is inserted and fixed to one end of the chuck 220, and the motor 230 is connected to the other end. The motor 230 is used as a power source for driving the shaft member 210 to rotate. Detailed configurations of the shaft member 210 and the chuck 220 will be described later. Even after the liner holding step (step P110) is completed, the liner 10 is continuously held by the pair of holding devices 200.

  As shown in FIG. 1, when the liner holding process (process P110) is completed, a rotation driving process is executed (process P115). In the rotational driving process (process P115), as shown by the white arrows in FIG. 3, while the shaft member 210 is pulled outward from both ends of the liner 10, both sides of the shaft member 210 sandwiching the liner 10 are rotated in the rotation direction R. Drive. Specifically, the shaft member 210 holding the −X side end of the liner 10 is pulled in the −X direction, and the shaft member 210 holding the + X side end of the liner 10 is pulled in the + X direction. . Then, the shaft members 210 are driven to rotate in the rotation direction R at the same speed.

  FIG. 4 is a cross-sectional view schematically showing how the shaft member 210 is fixed by the chuck 220. FIG. 5 is an exploded perspective view showing the configuration of the chuck 220. 4 shows a cross section along the Z-axis of the base 30 on the right side (+ X side) of the liner 10 in FIG. 3, the shaft member 210, and the chuck 220. As shown in FIG. As shown in FIGS. 4 and 5, the chuck 220 includes a tapered portion 221 and a body portion 222. As shown in FIG. 4, the tapered portion 221 is inserted into the shaft hole of the body portion 222. FIG. 5 shows the chuck 220 in a state where the tapered portion 221 is removed from the body portion 222.

  The tapered portion 221 has a cylindrical wedge shape. The tip end (−X direction side) of the taper portion 221 is formed in a tapered shape in which the outer peripheral diameter becomes smaller toward the −X direction. A plurality of slits SL arranged at a predetermined interval in the circumferential direction are formed in the tapered portion. Each slit SL extends substantially parallel to the X axis. A tapered portion 221 is inserted into the shaft hole of the body portion 222 in the direction of a white arrow parallel to the −X direction shown in FIG.

  The trunk portion 222 has a cylindrical appearance. The inner periphery of the rear end (+ X direction side) of the body portion 222 is formed in a shape matching the tapered portion of the taper portion 221. Specifically, the body portion 222 is formed in a tapered shape having an inner peripheral diameter that increases toward the + X direction. When the tapered portion 221 is inserted into the shaft hole of the trunk portion 222, the tapered portion of the trunk portion 222 and the tapered portion of the tapered portion 221 contact each other. At this time, the width of the slit SL of the taper portion 221 is narrowed, and the diameter of the tapered portion of the taper portion 221 is reduced. Thereby, the taper part 221 functions as a wedge. As shown in FIG. 4, a force f <b> 1 is applied to each shaft member 210 from the tapered portion 221 toward the central axis CX. Further, since each shaft member 210 rotates in the rotation direction R while being pulled toward the + X side along the center axis CX in the rotation driving step (step P115), each shaft member 210 includes the center axis CX. And the force in the rotation direction R are transmitted simultaneously. For this reason, it can suppress that force concentrates on one edge part of the liner 10. FIG.

  As shown in FIG. 1, when the rotation driving process (process P115) is completed, a fiber winding process is executed (process P120). In the fiber winding process (process P120), the reinforcing fiber is wound around the entire outer peripheral surface of the liner 10. Here, in the above-described rotation driving step (P115), as shown in FIG. 3, the liner 10 is rotated in the rotation direction R together with the shaft member 210, so that the reinforcing fiber is relative to the rotating liner 10. It is wrapped around. In this embodiment, the reinforcing fiber is wound around the liner 10 by helical winding. In addition, it may replace with helical winding and may be wound by hoop winding, and may be wound combining helical winding and hoop winding.

  As shown in FIG. 1, when the fiber winding process (process P120) is completed, a thermosetting process is performed (process P125). In the thermosetting process (process P125), the entire liner 10 is heated. Thereby, the thermosetting resin contained in the reinforcing fiber wound around the outer peripheral surface of the liner 10 is cured, and a fiber reinforced resin layer covering the outer surface of the liner 10 is formed. In this way, a tank having a fiber reinforced resin layer is obtained.

  According to the tank manufacturing method of the present embodiment described above, in the fiber winding step (process P125), the shaft member 210 that holds both ends along the central axis CX of the liner 10 is aligned along the central axis CX. 10, while both sides of the shaft member 210 sandwiching the liner 10 are driven to rotate about the central axis CX as the central axis, the force along the central axis CX and the force along the rotational direction R are At the same time, it can be transmitted to the shaft member 210, and the concentration of force on one end of the liner 10 can be suppressed, so that the liner 10 can be prevented from being deformed, such as bending or twisting. For this reason, the fiber can be wound around the outer peripheral surface of the liner 10 with high accuracy.

B. Variations:
B1. Modification 1:
In the said embodiment, although the liner 10 was prepared in the preparation process P105, this invention is not limited to this. For example, the impregnation process of the thermosetting resin to the reinforcing fiber wound around the liner 10 may be included. Even in these configurations, the same effects as those of the present embodiment can be obtained.

B2. Modification 2:
In the said embodiment, although the carbon fiber which impregnated the thermosetting resin was used as a reinforced fiber, this invention is not limited to this. Instead of the thermosetting resin, an ultraviolet curable resin may be impregnated. In that case, the resin may be cured by irradiating with ultraviolet rays in the thermosetting process (process P125). Even in such a configuration, the same effects as in the present embodiment can be obtained.

  The present invention is not limited to the above-described embodiments and modifications, and can be realized with various configurations without departing from the spirit of the present invention. For example, the technical features in the embodiments and the modifications corresponding to the technical features in each embodiment described in the summary section of the invention are to solve some or all of the above-described problems, or In order to achieve part or all of the effects, replacement or combination can be performed as appropriate. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

DESCRIPTION OF SYMBOLS 10 ... Liner 20 ... Main-body part 21 ... Cylinder part 22 ... Dome part 30 ... Base part 200 ... Holding device 210 ... Shaft member 220 ... Chuck 221 ... Tapered part 222 ... Trunk part 230 ... Motor CX ... Center axis R ... Rotation direction SL ... Slit f1 ... Power

Claims (2)

A tank manufacturing method comprising:
(A) A shaft member attached to both ends of the liner for the tank, and a chuck for inserting the shaft member and fixing the shaft member, and the inner peripheral diameter increases as the distance from the end of the liner increases. becomes barrel and fitted into the barrel, a chuck and a tapered portion the outer periphery diameter increases with distance from the end of the liner, with the opposite ends along the axis of the front Kira Ina, wherein Holding the liner rotatably about an axis as a central axis;
(B) Using the two shaft members fixed to the chuck, the liner is rotated in conjunction with the shaft member while pulling both ends of the liner in a direction in which both ends of the liner are separated along the axis. Process,
(C) winding the fiber around the liner rotating together with the shaft member according to (b);
Comprising
Tank manufacturing method.   Tank manufacturing equipment,
  A holding device having shaft members respectively attached to both end portions along the axis of the tank liner and a chuck for fixing the shaft member, wherein the liner is rotatably held around the axis. Having a holding device;
  The chuck is
    A barrel portion into which one end portion of the shaft member is inserted, and a barrel portion having an inner peripheral diameter that increases with distance from the end portion of the liner;
    A tapered portion having a cylindrical wedge shape that fits into the body portion, and a tapered portion whose outer diameter increases as the distance from the end of the liner increases;
  Comprising
  Tank manufacturing equipment.

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