JP2014136369A - Filament winding method and filament winding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve accuracy of a winding end folding position of a fiber bundle that generates accompanying with folding of an eye opening that sends a fiber bundle.SOLUTION: A filament winding apparatus 10 is that while an eye opening 41 is reciprocated along an axial direction of a liner wt that revolves around an axis, a fiber bundle ft is sent from the eye opening 41, the fiber bundle ft is wound to an outside surface of the liner wt. When performing the fiber bundle winding, a winding end folding position for an end fiber bundle fte in which folding of winding of the fiber bundle ft generates accompanying with folding when the eye opening 41 is reciprocated is detected by fiber bundle displacement sensors 28R, 28L, and a position lag (end displacement ds) with a reference position Kp predetermined to the liner wt is detected.

Description

  The present invention relates to a filament winding method and a filament winding apparatus.

  In recent years, vehicles that are driven by combustion energy of fuel gas or electric energy generated by electrochemical reaction of fuel gas have been developed. Fuel gas such as natural gas or hydrogen is stored in the high-pressure gas tank, and the vehicle May be installed. For this reason, there is a demand for weight reduction of high-pressure gas tanks, and FRP (Fiber) in which a hollow liner is covered with carbon fiber reinforced plastic or glass fiber reinforced plastic (hereinafter collectively referred to as a fiber reinforced resin layer). The adoption of high-pressure gas tanks (hereinafter simply referred to as high-pressure gas tanks) made of Reinforced Plastics (fiber reinforced plastics) is advancing. As the liner, a resin hollow container having gas barrier properties is usually used from the viewpoint of weight reduction.

  In manufacturing such a high-pressure gas tank, a filament winding method (hereinafter referred to as FW method) is widely adopted. By this FW method, a fiber bundle impregnated with a thermosetting resin such as an epoxy resin is repeatedly wound around the outer surface of the liner, A fiber reinforced resin layer is formed on the liner. The winding of the fiber bundle around the liner is performed by feeding the fiber bundle from a fiber yarn feeder that reciprocates along the axial direction of the liner rotating around the axis. The fiber yarn feeder is generally called the eye mouth, and the fiber bundle sent out from the eye mouth extends to the outer surface of the liner. The fiber bundle position at the eye mouth and the fiber bundle position at the outer surface of the liner do not always match. Such inconsistencies in the fiber bundle position affect the winding quality of the fiber bundle. Therefore, it is possible to avoid overlap between the fiber bundle wound first and the fiber bundle wound next, or between adjacent fiber bundles. A technique has been proposed in which the gap is reduced and the fiber bundle is smoothly wound around the outer surface of the liner (for example, Patent Document 1).

JP 2010-253789 A

  By the way, the eye opening turns the movement locus from the forward path to the return path and vice versa when reciprocating. Therefore, the fiber bundle sent out from the eye opening is turned back as the eye opening is turned, and is wound from the winding end turning position toward the center of the liner. For this reason, when the eye mouth turns back the movement trajectory, if the influence of the above-mentioned mismatch of the fiber bundle position appears, the situation where the winding end turn-back position of the fiber bundle may differ from the tank design specification may occur, ensuring the tank strength. It is feared that will be disturbed. In the above-mentioned patent document, although attention is paid to the relationship between the fiber bundle wound first and the fiber bundle wound next, the fiber wound first among the adjacent fiber bundles Lack of consideration about the relationship between the bundle and the winding end turn position. For these reasons, it has been required to improve the accuracy of the position at which the fiber bundle is wound back as the eye mouth is folded back. In the FW method, the reciprocating movement of the eye opening, the rotation of the liner, the sending of the fiber bundle, etc. are preliminarily numerically programmed based on the tank design specifications. The fact is that no measures are taken to improve the accuracy of the winding end folding position. In addition, securing of the tank strength of a high-pressure gas tank manufactured by the FW method and cost reduction are also demanded.

  In order to achieve at least a part of the problems described above, the present invention can be implemented as the following forms.

  (1) According to one aspect of the present invention, a filament winding method is provided. In this filament winding method, a fiber bundle is fed out from the fiber feeder while reciprocating along the axial direction of a fiber-wound member that rotates around the axis of the fiber yarn feeder that sends out the fiber bundle, A filament winding method in which a fiber bundle is wound around an outer surface of a winding member, wherein the fiber bundle turns when the fiber yarn feeder is turned back and forth, and the fiber bundle is turned back. The winding end folding position is detected by detecting a turning end folding position and comparing a predetermined reference position with respect to the fiber wound member and the detected winding end folding position. Detects position shift. According to the filament winding method of the above aspect, based on the detected misalignment of the winding end folding position, the accuracy of the winding end folding position of the fiber bundle accompanying the folding of the fiber yarn feeder and the fiber wound member can be obtained. It is possible to ensure the strength of the final product obtained or to determine whether the final product is good.

  (2) According to another aspect of the present invention, a filament winding apparatus is provided. The filament winding apparatus is a filament winding apparatus that winds a fiber bundle around an outer surface of a fiber wound member, and a shaft support portion that pivotally supports the fiber wound member and rotates around an axis, and a fiber bundle. A fiber that feeds a fiber bundle from the fiber yarn feeder and winds the fiber bundle around the outer surface of the fiber wound member while reciprocating the fiber yarn feeder that is fed out along the axial direction of the fiber wound member. A feed-back portion, a turn-back position detecting portion for detecting a turn-end turn-back position where the turn of the fiber bundle is turned back when the fiber feed port is turned back when the fiber feed port reciprocates; and the fiber The position of the winding end folding position associated with the folding back of the fiber yarn feeder is compared with a reference position predetermined with respect to the wound member and the winding end folding position detected by the folding position detection unit. And a positional displacement detector for detecting the displacement. According to the filament winding apparatus of the above aspect, based on the detected displacement of the winding end folding position, the accuracy of the winding end folding position of the fiber bundle accompanying the folding of the fiber yarn feeder is improved and the fiber winding member obtains it. It is possible to provide a filament winding apparatus capable of ensuring the strength of the final product obtained or determining the quality of the final product.

  The present invention can be realized in various forms. For example, a high-pressure gas tank manufacturing method, manufacturing apparatus, and filament for winding a fiber bundle around an outer surface of a cylindrical liner to form a fiber layer on the liner The present invention can be realized in the form of a program for executing the winding method, a numerical control program for equipment in the filament winding apparatus, or the like.

It is explanatory drawing which shows schematically the structure of the filament winding apparatus 10 as embodiment of this invention. It is explanatory drawing which shows the mode of determination of the reference position Kp using the master gauge Mg, and the mode of sensor output adjustment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram schematically showing the configuration of a filament winding apparatus 10 as an embodiment of the present invention. The filament winding apparatus 10 winds the fiber bundle ft around the outer surface of the next liner wt. The liner wt is a resin container having a gas barrier property against hydrogen gas, and includes a substantially cylindrical cylinder portion wts having a uniform radius, and convex curved dome portions wtd provided at both ends of the cylinder portion. The dome part wtd is configured by an isotonic curved surface, and has a base wtk for connecting to an external pipe or the like at the apex thereof. The liner wt is pivotally supported by the jig wtk so as to be rotatable about an axis by a liner drive system 20 described later with the pivot support jig wtj mounted on the base wtk. In the present embodiment, a resin container made of a nylon resin is used as the resin container. A resin container made of another resin may be used as long as it has a gas barrier property against hydrogen gas.

  The filament winding apparatus 10 includes a liner drive system 20, a fiber bundle supply system 40, and a control device 70. The liner drive system 20 has a so-called mirror configuration for the purpose of pivoting and rotating the liner wt on both the left and right sides. Therefore, in the following explanation, the right side device and the left side device are R, L. Represented with a reference numeral. The liner drive system 20 includes a table 21, shaft support blocks 22R and 22L, drive motors 23R and 23L, shaft support shafts 24R and 24L, and fiber bundle displacement sensors 28R and 28L. The shaft support blocks 22R, 22L are placed on the table 21 via linear guides 25R, 25L, and are slidable in the left-right direction in the figure. That is, when the liner wt is attached and removed, the two-axis support block is retracted to the right or left.

  The drive motors 23R and 23L are attached to the shaft support blocks 22R and 22L with their rotation shafts connected to the shaft support shafts 24R and 24L. The drive motors 23R and 23L are driven to rotate in response to a control signal from the control device 70, and the drive motor 23R and the drive motor 23L rotate in the opposite direction. Thus, the liner wt supported on the shafts 24R and 24L via the shaft support jig wtj rotates in one direction and winds the fiber bundle ft to be sent out from the fiber bundle supply system 40 around its outer surface. To do. The drive motor may be mounted only on the side of one of the shaft support blocks 22R and 22L.

  The shaft support block 22L has a stopper 26 positioned on the front end side of the linear guide 25L, and an advance end position toward the liner wt side is defined. The fiber support block 22L is fixed to the advance end position when the fiber bundle ft is wound. ing. Since the shaft support block 22R is pressed toward the liner wt by a clamping mechanism (not shown), the liner wt is between the shaft support block 22L at the forward end position and the shaft support block 22R pressed toward the front end block 22R. The shaft is supported by the shafts 24R and 24L and the shaft support jig wtj, and the reproducibility of the liner shaft support position is ensured.

  The fiber bundle displacement sensors 28R and 28L are installed on the table 21 so as to face the liner wt, detect the displacement of the liner surface, which is the facing portion, in a non-contact manner as a distance from the sensing portion, and detect the detection signal of the control device 70. Send to. Specifically, the fiber bundle displacement sensors 28R and 28L face the outer surface of the cylinder portion wts of the liner wt and detect the displacement of the outer surface. Therefore, if the fiber bundle ft is not wound, a uniform detection value is obtained. Is output. Then, when the fiber bundle ft is wound around the liner wt, as shown in the enlarged view of the part A, the opposing portion (fiber bundle surface) is a fiber bundle displacement sensor 28R corresponding to the thickness of the wound fiber bundle ft. 28L, both sensors detect the displacement fd corresponding to the thickness of the fiber bundle ft, and output the detected value to the control device 70. Of the fiber bundles ft wound around the liner wt, the fiber bundle displacement sensors 28R and 28L are only the end displacement ds from the reference position Kp for the end fiber bundle fte wound on the most end side. In a shifted state, a detection signal corresponding to the displacement fd is output, and the end displacement ds is determined according to the winding position of the end fiber bundle fte. The fiber bundle displacement sensors 28R and 28L output a uniform reference detection signal obtained by sensing the outer surface of the cylinder portion wts between the end portion displacements ds. In the present embodiment, the fiber bundle displacement sensors 28R and 28L are configured to detect a displacement fd corresponding to the fiber bundle thickness (about 0.5 to 1.0 mm) when the fiber bundle ft is wound. For a displacement exceeding the displacement fd, a detection value determined by the displacement is output. The manner of setting the reference position Kp will be described later.

  The fiber bundle supply system 40 includes an eye opening 41, a drive motor 42, a linear guide rail 43, an intermediate guide body 44, a fiber bundle winding roller 45, and a drive motor 46. The eye opening 41 is configured to send the fiber bundle ft to the liner wt and is guided by the linear guide rail 43. The drive motor 42 is driven forward and reversely under the control of the control device 70, and the linear guide rail 43 converts the motor driving force into a reciprocating operation of the eye opening 41 and transmits it to the eye opening 41. As a result, the eye opening 41 sends the fiber bundle ft to the liner wt while reciprocating along the axial direction of the liner wt. The drive motor 46 rotates the fiber bundle take-up roller 45 under the control of the control device 70 so as to send out the fiber bundle ft from the fiber bundle take-up roller 45, and also adjusts the tension of the fiber bundle ft to be sent out. . The fiber bundle ft sent out in this way is a thermosetting resin-impregnated carbon fiber bundle, glass fiber bundle or the like in order to form a fiber reinforced resin layer on the outer periphery of the liner wt.

  The control device 70 is configured as a computer including a CPU, a ROM, a RAM, and the like that perform logical operations, and the driving status of various motors such as the driving motors 23R and 23L, the sending status of the fiber bundle ft from the fiber bundle supply system 40, and the like. The filament winding apparatus 10 is controlled in accordance with a program that defines the above. As shown in FIG. 1, when a starter switch (not shown) is operated in a state where the liner wt is already pivotally supported, the control device 70 receives the switch operation to drive and control the drive motors 23R and 23L. Rotate wt around the axis. When the liner rotation is stabilized, the controller 70 controls the drive motor 42 and the drive motor 46 to reciprocate the eye opening 41 of the fiber bundle supply system 40 along the axial direction of the liner wt. The fiber bundle ft is sent out from the port 41, and the fiber bundle ft is wound around the outer surface of the liner wt. The control device 70 receives the detection values of the fiber bundle displacement sensors 28R and 28L while the fiber bundle ft is being wound. Both sensors output a detection signal corresponding to the displacement fd described before and after the folding of the fiber bundle ft occurs when the eye opening 41 reciprocates along the axial direction of the liner wt. For the end fiber bundle fte, a uniform reference detection signal obtained by sensing the outer surface of the cylinder part wts with a shift of the end part displacement ds from the reference position Kp is output. The end fiber bundle fte is wound at a winding end folding position where the folding of the fiber bundle ft occurs as the eye opening 41 is folded.

  Next, how the reference position Kp is set will be described. FIG. 2 is an explanatory diagram showing how the reference position Kp is determined using the master gauge Mg and how the sensor output is adjusted. The master gauge Mg has the same jig as the shaft support jig wtj attached to the base wtk of the liner wt at both ends of the shaft, and includes the full length including the jig and the support shafts 24R and 24L of the shaft support jig wtj. The shaft support state is the same as the shaft support state of the liner wt. In addition, the master gauge Mg includes large and small master flanges that define the left and right folding reference positions Kp. This large and small master flange is configured by joining a large diameter master flange MfL and a small diameter master flange Mfs, and the step is formed by the outer surface of the cylinder portion wts and the end fiber bundle fte shown in FIG. It corresponds to a step. A flange side surface of the master gauge Mg on the side of the small diameter master flange Mfs of the large diameter master flange MfL is set as a reference position Kp with respect to the liner wt that is the winding target of the end fiber bundle fte. In other words, the large and small master flanges have the outer end fiber bundle fte wound around the outer surface of the cylinder part wts and the design specifications shown in FIG. 1 and the fiber bundle wound side by side. Reproduce the form of ft.

  The reference position Kp is defined as a position where the end fiber bundle fte of the fiber bundles ft wound first on the outer surface of the cylinder part wts is to be wound. Accordingly, if the large-diameter master flange MfL and the small-diameter master flange Mfs are sensed by the fiber bundle displacement sensors 28R and 28L in a state where the master gauge Mg is axially supported by the liner drive system 20, the end displacement ds is zero. Therefore, the output signal on the left side of the reference position Kp becomes a uniform reference detection signal corresponding to the outer surface sensing of the cylinder part wts, and the output signal on the right side is the wound fiber bundle ft. This is a detection signal corresponding to the displacement fd that matches the thickness. If a uniform reference detection signal is output by shifting from the reference position Kp by the end portion displacement ds, the calibration of the fiber bundle displacement sensors 28R and 28L is not completed, and the output of both sensors is zero. Such a situation may occur immediately after manufacturing the filament winding apparatus 10 or when replacing the sensor. The calibration parameters are stored in the control device 70, and the control device 70 compares the calibrated sensor output with the reference position Kp of the end fiber bundle fte.

  As described above, the filament winding apparatus 10 according to the present embodiment, when winding the fiber bundle ft sent out from the eye opening 41 of the fiber bundle supply system 40 around the outer surface of the liner wt, The ft wound side by side is sensed by the fiber bundle displacement sensors 28R and 28L. Both sensors output a detection signal of the displacement fd corresponding to the thickness of the fiber bundle ft before and after the winding of the fiber bundle ft occurs. For the end fiber bundle fte, the end displacement ds from the reference position Kp. A uniform reference detection signal in which the outer surface of the cylinder part wts is sensed is output with a deviation. Therefore, according to the filament winding apparatus 10 of the present embodiment, the end displacement ds which is a comparison result between the reference position Kp and the winding end turn position of the end fiber bundle fte in the control device 70 that receives such a signal input. Can be detected. As a result, according to the filament winding apparatus 10 of the present embodiment, the winding end turn position of the end fiber bundle fte for the liner wt where the end displacement ds exceeds the allowable range from the viewpoint of ensuring the tank strength and the like. If it is defective, the shipment can be canceled and the quality of the shipment can be maintained. In addition, according to the filament winding apparatus 10 of the present embodiment, the end portion fiber bundle fte is wound when the eye opening 41 is folded back by allowing the end portion displacement ds to fall within the allowable range from the viewpoint of ensuring the tank strength. In addition to increasing the end folding position accuracy, it is possible to secure the strength of the high-pressure gas tank using the wound liner wt of the fiber bundle ft. In addition, according to the filament winding apparatus 10 of the present embodiment, the reciprocating speed of the eye opening 41, the folding position, and the like are changed so that the end portion displacement ds is within the allowable range from the viewpoint of ensuring the tank strength. The program can be modified accordingly. Therefore, by improving the program in consideration of the feedback of the end portion displacement ds and driving the device, the accuracy of the winding end turn position of the end fiber bundle fte accompanying the turn of the eye opening 41 is further improved and the quality is stabilized. be able to.

  The filament winding apparatus 10 repeatedly winds the fiber bundle ft while improving the winding end folding position accuracy of the end fiber bundle fte accompanying the folding of the eye opening 41 as described above. Specifically, even when the fiber bundle ft is wound around a plurality of layers, the hoop winding and the low-angle and high-angle helical windings are separately used even in the winding method. The cylinder part wts and the dome part wtd are wound around the entire outer surface of the liner. The wound liner wt of the fiber bundle ft thus obtained is subjected to induction heating by, for example, an induction heating device, and a high pressure gas tank is obtained through thermosetting of the resin.

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

  In the above-described embodiment, the production of the high-pressure gas tank through the winding of the fiber bundle ft around the liner wt has been described. Further, when the fiber bundle ft is repeatedly stacked and wound around the liner wt, the winding end turn position of the end fiber bundle fte is changed from the reference position Kp each time a predetermined unit of winding (for example, hoop winding) is performed. There may also be a high-pressure gas tank designed to shift slightly toward the center of the liner. In such a case, each time a predetermined unit of winding is performed, an end displacement ds for the end fiber bundle fte that is wound first is detected, and based on the detected end displacement ds, a predetermined unit is detected. The winding end folding position can be improved each time the winding is performed.

DESCRIPTION OF SYMBOLS 10 ... Filament winding apparatus 20 ... Liner drive system 21 ... Table 22R, 22L ... Shaft support block 23R, 23L ... Drive motor 24R, 24L ... Shaft support shaft 25R, 25L ... Linear guide 26 ... Stopper 28R, 28L ... Fiber bundle displacement sensor DESCRIPTION OF SYMBOLS 40 ... Fiber bundle supply system 41 ... Eye opening 42 ... Drive motor 43 ... Linear guide rail 44 ... Intermediate guide body 45 ... Fiber bundle winding roller 46 ... Drive motor 70 ... Controller fd ... Displacement Mg ... Master gauge Kp ... Reference position ds ... End displacement ft ... Fiber bundle MfL ... Large diameter master flange Mfs ... Small diameter master flange fte ... End fiber bundle wt ... Liner wts ... Cylinder part wtd ... Dome part wtj ... Shaft support jig wtk ... Base

Claims (2)

While reciprocating the fiber yarn feeding port that feeds the fiber bundle along the axial direction of the fiber wound member that rotates about the axis, the fiber bundle is fed from the fiber yarn feeding port to the outer surface of the fiber wound member. A filament winding method for winding a fiber bundle,
Detecting a winding end turn position at which the turn of the fiber bundle is turned with the turning of the fiber feed port when the fiber feed port reciprocates;
A reference position predetermined with respect to the fiber wound member is compared with the detected winding end folding position, and a positional deviation of the winding end folding position accompanying the folding of the fiber yarn feeder is detected. Filament Winding method. A filament winding apparatus for winding a fiber bundle around an outer surface of a fiber wound member,
A shaft support portion that pivotally supports the fiber wound member and rotates around the shaft;
While reciprocating the fiber yarn feeder that feeds the fiber bundle along the axial direction of the fiber wound member, the fiber bundle is delivered from the fiber yarn feeder, and the fiber bundle is wound around the outer surface of the fiber wound member. A spinning fiber feed section;
A folding position detecting unit that detects a winding end folding position where the folding of the fiber bundle occurs when the fiber feeding port is folded when the fiber feeding port reciprocates; and
The position of the winding end folding position that accompanies the folding of the fiber yarn feeder by comparing a reference position predetermined with respect to the fiber wound member and the winding end folding position detected by the folding position detection unit. A filament winding apparatus comprising a positional deviation detection unit for detecting deviation.

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