JP2013063584A - Filament winding method and filament winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a time necessary for hoop winding by eliminating the loosened winding and combined winding of a fiber bundle when starting the hoop winding.SOLUTION: In this filament winding method which performs a hoop winding process, the hoop winding process includes: a first process for fixing the end of the fiber bundle to a liner surface in a start position of the hoop winding; a second process for hoop-winding the fiber bundle fixed to the liner surface at its end in the first process; a third process for fixing the fiber bundle which is hoop-wound in the second process to the liner surface in a finish position of the hoop winding; and a fourth process for cutting the fiber bundle at the upstream side in the fiber bundle supply direction rather than a position in which the fiber bundle is fixed in the third process.

Description

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

  A filament winding apparatus that includes a hoop winding device and a helical winding device, and alternately and repeatedly performs hoop winding and helical winding on the liner to wind a fiber bundle around the liner to form a reinforcing layer is known. There is (for example, Patent Document 1).

  The operation of the conventional hoop winding device will be described. When the hoop winding is completed, the hoop winding device moves to the retracted position away from the liner while the hoop-wrapped fiber bundle is connected to the liner surface. Next, helical winding is performed on the hoop winding, and when the helical winding is completed, the hoop winding apparatus moves to a position where the next hoop winding is started. At this time, the movement is started while performing the sweet winding from the retreat position. The sweet winding is a winding method performed when the hoop winding device is moved while winding the fiber bundle, and the sweet wound fiber bundle does not participate in the formation of the reinforcing layer.

  When the hoop winding device moves to the end of the liner while performing sweet winding, the hoop winding device starts combination winding. The combination winding is a winding method in which the fiber bundle winding position is gradually moved to the hoop winding start position while the fiber bundle is alternately and repeatedly wound around both ends of the liner (see Patent Document 2).

  As described above, in the filament winding apparatus including the conventional hoop winding device and the helical winding device, the hoop winding and the helical winding are continuously performed. When performing, the hoop-wrapped fiber bundle is kept connected to the liner surface without being cut. This eliminates the need for the operator to manually fix the fiber bundle to the liner surface when the next hoop winding is performed.

JP 2010-36461 A JP 2009-174700 A

  However, when helical winding is completed and the next hoop winding is performed, the hoop winding device moves from the retracted position to the hoop winding start position while performing a sweet winding or combination winding of the fiber bundle. For this reason, if the fiber bundle wound with the hoop is connected to the liner surface without being cut, it takes time to perform sweet winding or combination winding of the fiber bundle, and on the contrary, there is a problem that the time required for the hoop winding becomes longer. . In addition, sweet winding or combination winding of fiber bundles hardly participates in the formation of the reinforcing layer of the liner. For this reason, an extra fiber bundle will be used and there exists a problem of causing the increase in manufacturing cost.

  The present invention has been made to solve the above problems. The first object of the present invention is to shorten the time required for hoop winding by eliminating the need for sweet winding or combination winding of fiber bundles when starting hoop winding. The second object of the present invention is to eliminate the need for sweet winding or combination winding of the fiber bundle, reduce the amount of the fiber bundle used, and reduce the manufacturing cost.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, the first invention is a filament winding method for performing a hoop winding step, wherein the hoop winding step includes a first step of fixing an end portion of a fiber bundle to a liner surface at a hoop winding start position; A second step of hoop-winding the fiber bundle whose end is fixed to the liner surface in the first step, and the fiber bundle hoop-wound in the second step on the liner surface at the end position of the hoop winding. A third step of fixing, and a fourth step of cutting the fiber bundle on the upstream side in the fiber bundle supply direction from the position where the fiber bundle is fixed in the third step.

2nd invention is 1st invention, Comprising:
The fiber bundle includes a thermosetting resin or a thermoplastic resin. The fixing of the fiber bundle to the liner surface in the first step and the third step is performed by bringing the fiber bundle into contact with the liner surface. Heat.

3rd invention is either 1st or 2nd invention, Comprising:
In the second step, the hoop winding is started in a state where the tension of the fiber bundle is lower than the specified tension, and the hoop winding is performed so that the fiber bundles overlap with each other. And a fifth step of winding the hoop with a specified tension.

4th invention is 3rd invention, Comprising:
In the fourth step, hoop winding is performed so that the fiber bundles intersect.

  5th invention is a filament winding apparatus which winds a fiber bundle on the liner surface with a hoop winding apparatus, Comprising: The said hoop winding apparatus is provided with the winding part, the fixing | fixed part, the cutter, and the control part. The winding part hoops the fiber bundle around the liner surface. The fixing portion fixes the fiber bundle to the liner surface. The cutter cuts the fiber bundle. The control unit includes a first fixing operation by the fixing unit that fixes an end portion of the fiber bundle to the liner surface at a hoop winding start position, and the winding unit that hoops the fiber bundle having the end portion fixed to the liner surface. The fiber bundle than the position where the fiber bundle is fixed by the fixing portion for fixing the fiber bundle hoop-wound at the end position of the hoop winding to the liner surface, and the second fixing operation. The cutting operation by the cutter for cutting the fiber bundle on the upstream side in the bundle supply direction is controlled.

6th invention is 5th invention, Comprising:
The fiber bundle includes a thermosetting resin or a thermoplastic resin, and the fixing portion brings the fiber bundle into contact with the liner surface and heats the contact portion.

7th invention is 6th invention, Comprising:
The fixing unit includes a heater that heats the fiber bundle, and a gripping unit that can grip the fiber bundle on both the upstream side and the downstream side in the fiber bundle supply direction with respect to the heater, and the control unit includes the controller In the first fixing operation, in the first gripping operation by the grip portion that grips the fiber bundle on the downstream side in the fiber bundle supply direction with respect to the heater, and in the second fixing operation, the fiber bundle with respect to the heater. The second gripping operation by the gripping part that grips the fiber bundle on the upstream side in the supply direction is controlled.

  As effects of the present invention, the following effects can be obtained.

  According to the first invention, when the hoop winding is started, the end of the fiber bundle is fixed to the liner surface at the hoop winding start position, and the hoop winding is started. When the hoop winding is finished, the fiber bundle is fixed to the liner surface at the end position of the hoop winding, and the fiber bundle is cut. Thus, when starting the hoop winding, at the start position of the hoop winding, the end of the fiber bundle is fixed to the liner surface to start the hoop winding, so that the sweet winding or combination winding of the fiber bundle is unnecessary, The time required for hoop winding can be reduced. Moreover, since the sweet bundle and combination winding of a fiber bundle are unnecessary, the usage-amount of a fiber bundle can be reduced and manufacturing cost can be reduced.

  According to the second invention, the fiber bundle includes a thermosetting resin or a thermoplastic resin, and the fixing of the fiber bundle to the liner surface brings the fiber bundle into contact with the liner surface and heats the contact portion. Thereby, a thermosetting resin or a thermoplastic resin hardens | cures or welds, and a fiber bundle can be fixed to the liner surface.

  According to the third aspect of the invention, after fixing the fiber bundle to the liner surface, the hoop winding is started in a state where the tension of the fiber bundle is lowered below the specified tension, and the hoop winding is performed for a predetermined number of turns so that the fiber bundles overlap. Thereby, it can prevent that the fixing | fixed part of a fiber bundle is pulled by high tension and remove | deviated. Further, since the hoop winding is performed by setting the tension of the fiber bundle to a specified tension after performing the hoop winding so that the fiber bundles overlap, a reinforcing layer having a specified strength can be formed.

  According to the fourth aspect of the invention, after fixing the fiber bundle to the liner surface, the hoop winding is started in a state where the tension of the fiber bundle is lower than the specified tension, and the hoop winding is performed so that the fiber bundles intersect. Thereby, since the fiber bundle wound down is fastened and fixed by the fiber bundle wound up, it can prevent reliably that the fixing | fixed part of a fiber bundle is pulled by high tension and remove | deviated.

  According to the fifth aspect, when starting the hoop winding, the end of the fiber bundle is fixed to the liner surface at the hoop winding start position, and the hoop winding is started. When the hoop winding is finished, the fiber bundle is fixed to the liner surface at the end position of the hoop winding, and the fiber bundle is cut. Thus, when starting the hoop winding, at the start position of the hoop winding, the end of the fiber bundle is fixed to the liner surface to start the hoop winding, so that the sweet winding or combination winding of the fiber bundle is unnecessary, The time required for hoop winding can be reduced. Moreover, since the sweet bundle and combination winding of a fiber bundle are unnecessary, the usage-amount of a fiber bundle can be reduced and manufacturing cost can be reduced.

  According to 6th invention, a fiber bundle contains a thermosetting resin or a thermoplastic resin, and fixation of the fiber bundle to a liner surface makes a fiber bundle contact a liner surface, and heats a contact part. Thereby, a thermosetting resin or a thermoplastic resin hardens | cures or welds, and a fiber bundle can be fixed to the liner surface.

  According to the seventh invention, when starting the hoop winding, the gripping part grips the fiber bundle on the downstream side in the fiber bundle supply direction with respect to the heater, brings the fiber bundle into contact with the liner surface, and the contact portion with the heater. By heating, the end of the fiber bundle can be fixed to the liner surface at the start position of the hoop winding. In addition, when the hoop winding is finished, the fiber bundle is gripped on the upstream side in the fiber bundle supply direction with respect to the heater, the fiber bundle is brought into contact with the liner surface, and the contact portion is heated by the heater to complete the hoop winding. In position, the fiber bundle can be secured to the liner surface and the fiber bundle can be cut with a cutter. Thus, since the start and end of hoop winding are automated and performed quickly, the time required for hoop winding can be shortened.

The side view of the FW apparatus 100 which concerns on Example 1 which shows the state in which the hoop winding apparatus 30 exists in a winding start position. The side view of the FW apparatus 100 which concerns on Example 1 which shows the state in which the hoop winding apparatus 30 is performing the hoop winding. The side view of the FW apparatus 100 which concerns on Example 1 which shows the state in which the hoop winding apparatus 30 exists in a standby position. The side view of the hoop winding device 30. FIG. The front view of the hoop winding apparatus 30 seen from the arrow C direction of FIG. The figure which shows the operation | movement which fixes the edge part of the fiber bundle F to the outer peripheral surface 1S of the liner 1 in the hoop winding start position. The figure which shows the state which the process part 51 moved to the retracted position PB. The figure which shows the holding | grip operation | movement which hold | grips the fiber bundle F in the upstream of the fiber bundle supply direction FA with respect to the heater 63. FIG. The figure which shows the fixing operation | movement which fixes the fiber bundle F hoop-wrapped to the outer peripheral surface 1S of the liner 1 in the completion | finish position of hoop winding. The figure which shows the cutting | disconnection operation | movement which cut | disconnects the fiber bundle F in the upstream of the fiber bundle supply direction FA rather than the position where the fiber bundle F was fixed. The figure which shows the state which the process part 51 moved to the retracted position PB.

  Next, embodiments of the invention will be described with reference to the drawings.

  First, the overall configuration of the filament winding apparatus 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1, 2, and 3. Hereinafter, the filament winding apparatus 100 is abbreviated as FW apparatus 100.

  1, 2, and 3 are side views showing the FW device 100. FIG. 1 shows a state in which the hoop winding device 30 is in the winding start position. FIG. 2 shows a state in which the hoop winding device 30 performs hoop winding. FIG. 3 shows a state where the hoop winding device 30 is in the standby position. The FW device 100 winds the fiber bundle F impregnated with resin around the liner 1 by alternately repeating the hoop winding by the hoop winding device 30 and the helical winding by the helical winding device 40 around the liner 1. It is a device that goes.

  Arrows A and B shown in FIG. 1 indicate the front-rear direction of the FW device 100 and the transfer direction of the liner 1 in helical winding. In helical winding, since the liner 1 is reciprocated in the front-rear direction of the FW device 100, the liner 1 may be transferred in the direction of arrow A or in the direction of arrow B.

  The liner 1 is a substantially cylindrical hollow container formed of, for example, a high-strength aluminum material or a polyamide resin. The liner 1 is improved in pressure resistance when the fiber bundle F is wound around the outer peripheral surface 1S of the liner 1. That is, the liner 1 is a base material constituting the pressure vessel. In the following description, the liner 1 means both a state before winding the fiber bundle F and a state in the middle of winding the fiber bundle F. For example, the outer peripheral surface 1S of the liner 1 also means the surface of the wound fiber bundle F.

  The FW device 100 mainly includes a main base 10, a liner transfer device 20, a hoop winding device 30, a helical winding device 40, and a control unit C. The main base 10 constitutes the basis of the FW device 100. A liner transfer device rail 11 is provided on the upper portion of the main base 10. The liner transfer device 20 is placed on the liner transfer device rail 11. A hoop winding device rail 12 is provided on the main base 10 in parallel with the liner transfer device rail 11. A hoop winding device 30 is placed on the rail 12 for the hoop winding device. With such a configuration, the liner transfer device 20 and the hoop winding device 30 can be moved with respect to the main base 10. The helical winding device 40 is fixed to the main base 10.

  The liner transfer device 20 is a device that rotates the liner 1 around the rotation axis in the direction along the front-rear direction of the FW device 100 and transfers the liner 1 in the front-rear direction of the FW device 100. The liner transfer device 20 mainly includes a base 21 and a liner support portion 22. The driving of the liner transfer device 20 is controlled by the control unit C.

  The base 21 includes a pair of liner support portions 22. Each liner support portion 22 includes a liner support frame 23 and a support shaft 24. The liner support frame 23 extends upward from the base 21. The support shaft 24 extends from the liner support frame 23 along the front-rear direction of the FW device. The support shaft 24 is rotated in one direction around the axis by a power mechanism (not shown). The support shaft 24 supports both ends of the liner 1 and rotates the liner 1. With such a configuration, the liner transfer device 20 rotates the liner 1 about the support shaft 24 as a rotation axis, and transfers the liner 1 in the front-rear direction of the FW device 100.

  The hoop winding device 30 is a device that hoops the fiber bundle F around the outer peripheral surface 1S of the liner 1. In the hoop winding, the fiber bundle F is wound around the outer peripheral surface 1S of the liner 1 so that the winding angle of the fiber bundle F with respect to the central axis of the liner 1 is approximately 90 degrees. The hoop winding device 30 mainly includes a base 31, a power mechanism 32, a hoop winding device 33, and a fiber bundle processing device 50. The driving of the hoop winding device 30 is controlled by the control unit C.

  The base 31 is provided with a power mechanism 32 and a hoop winding device 33. The hoop winding device 33 includes a winding table 34 and a bobbin 71 (71A, 71B, 71C, 71D) (see FIG. 5). A space for inserting the liner 1 is provided in the center of the winding table 34. The bobbins 71 (71 </ b> A, 71 </ b> B, 71 </ b> C, 71 </ b> D) are provided on the winding table 34 and supply the fiber bundle F to the outer peripheral surface 1 </ b> S of the liner 1. The power mechanism 32 rotates the hoop winding device 33 around the central axis of the liner 1.

  In the hoop winding, the position of the liner 1 is fixed, and the hoop winding device 33 is rotated around the central axis of the liner 1 while the hoop winding device 30 is reciprocated along the central axis direction of the liner 1. Thereby, hoop winding is performed. Note that the winding mode of the fiber bundle F can be freely changed by adjusting the moving speed of the hoop winding device 30 and the rotation speed of the winding table 34. The fiber bundle processing device 50 will be described in detail later.

  The helical winding device 40 is a device that helically winds the fiber bundle F around the outer peripheral surface 1S of the liner 1. In the helical winding, the fiber bundle F is wound around the outer peripheral surface 1S of the liner 1 so that the winding angle of the fiber bundle F becomes a predetermined value (for example, 0 to 60 degrees). The helical winding device 40 mainly includes a base 41 and a helical winding device 42. The driving of the helical winding device 40 is controlled by the control unit C.

  The base 41 is provided with a helical winding device 42. The helical winding device 42 includes a first helical head 43 and a second helical head 44. A fiber bundle F is supplied to the first helical head 43 and the second helical head 44 from a plurality of bobbins (not shown), and the fiber bundle F is guided to the outer peripheral surface 1S of the liner 1.

  In helical winding, the helical winding device 40 is fixed, and the liner 1 is transferred by the liner transfer device 20 in the direction of the rotation axis while rotating. Thereby, helical winding is performed. In addition, the winding aspect of the fiber bundle F can be freely changed by adjusting the transfer speed and rotation speed of the liner 1.

  Next, the fiber bundle processing device 50 of the hoop winding device 30 which is a characteristic part of the present invention will be described in detail. FIG. 4 is a side view of the hoop winding device 30, and FIG. 5 is a front view of the hoop winding device 30 viewed from the direction of arrow C in FIG.

  First, the hoop winding device 30 will be described in detail. As shown in FIGS. 4 and 5, a bobbin 71 (71 </ b> A, 71 </ b> B, 71 </ b> C, 71 </ b> D), a fiber supply guide 72, and a guide roller 73 are disposed on the winding table 34 of the hoop winding device 30. The bobbins 71 (71 </ b> A, 71 </ b> B, 71 </ b> C, 71 </ b> D) are arranged at equal intervals around the liner 1 inserted through the winding table 34 and supply the fiber bundle F to the liner 1. The guide roller 73 guides the four fiber bundles F from the bobbins 71A, 71B, 71C, 71D together to the fiber supply guide 72. The fiber supply guide 72 supplies the four fiber bundles F collected by the guide roller 73 to the outer peripheral surface 1S of the liner 1.

  The winding table 34 is rotated in the direction of arrow R in FIG. The fiber bundle F guided from the fiber supply guide 72 to the liner 1 is wound around the outer peripheral surface 1S of the liner 1 while being rotated in the arrow R direction. The fiber bundle F is supplied in the direction of the arrow FA, which is the downstream side in the rotation direction of the winding table 34. Hereinafter, the direction FA in which the fiber bundle F is supplied is referred to as a fiber supply direction FA. Further, the base end side of the arrow FA is referred to as the upstream side of the fiber supply direction FA, and the tip side of the arrow FA is referred to as the downstream side of the fiber supply direction FA. A position where the fiber bundle F guided from the fiber supply guide 72 to the liner 1 is wound in contact with the outer peripheral surface 1S of the liner 1 is referred to as a winding position WP.

  The power mechanism 32 that drives the winding table 34 is connected to the control unit C, and based on a signal from the control unit C, rotation and stop are controlled. The control unit C is connected to a detection unit (not shown) that detects the rotation angle of the winding table 34 and detects the position of the winding table 34. For example, an encoder is used as the detection unit. The control unit C can determine the position of the bobbin 71 (71A, 71B, 71C, 71D), the winding position WP of the fiber bundle F, and the like by detecting the position of the winding table 34. Further, the control unit C controls the power mechanism 32 while detecting the position of the winding table 34, so that the winding position WP of the fiber supply guide 72 and the fiber bundle F comes to an arbitrary position. It is also possible to stop the rotation of the table 34.

  Next, the fiber bundle processing apparatus 50 will be described. As shown in FIGS. 4 and 5, the fiber bundle processing apparatus 50 mainly includes a processing unit 51, an arm 52, and a driving unit 53. The fiber bundle processing device 50 is disposed on the winding table 34 on the side where the fiber bundle F is wound, that is, on the same side as the bobbin 71 (71A, 71B, 71C, 71D), the fiber supply guide 72, and the like. The fiber bundle processing device 50 is connected to the control unit C, and the processing unit 51 and the drive unit 53 are driven based on a signal from the control unit C. The support part 54 supports the fiber bundle processing apparatus 50 and is fixed to the base 31.

  The processing unit 51 performs an operation of fixing the fiber bundle F supplied from the fiber supply guide 72 of the winding table 34 to the outer peripheral surface 1S of the liner 1 at the start and end of the hoop winding. The processing unit 51 includes a processing unit main body 55, a fixing unit 61, and a cutter 62.

  The fixing unit 61 and the cutter 62 are supported by the processing unit main body 55. The arm 52 supports the processing unit 51, the first end is fixed to the processing unit main body 51, and the second end is fixed to the driving unit 53. The drive unit 53 swings the arm 52 and the processing unit 51. A motor (not shown) as a driving source and a gear (not shown) for transmitting the driving force of the motor to the arm 52 are provided. The drive unit 53 is placed on the support unit 54. As shown in FIG. 5, the drive unit 53 swings the arm 52 based on a control signal from the control unit C and switches the position of the processing unit 51 between the operating position PA and the retracted position PB.

  The operation position PA of the processing unit 51 is a position where the processing unit 51 performs an operation of fixing the fiber bundle F to the outer peripheral surface 1S of the liner 1 at the start and end of hoop winding. The retracting position PB of the processing unit 51 is such that when the fiber bundle F is hoop-wound around the outer peripheral surface 1S of the liner 1, the winding table 34, the bobbin 71 (71A, 71B, 71C, 71D), and the fiber bundle F In this position, the processing unit 51 and the arm 52 do not interfere with each other.

  The fixed part 61 includes a heater 63 and a grip part 64. The heater 63 includes heating means. The heater 63 is cured or welded in a short time by contacting the fiber bundle F supplied from the fiber supply guide 72 of the winding table 34 and heating the thermosetting resin or thermoplastic resin impregnated in the fiber bundle F. Thus, the fiber bundle F is fixed to the outer peripheral surface 1S of the liner 1. In this embodiment, a thermosetting resin is used as the resin impregnated in the fiber bundle F. The heater 63 is provided on the fixed portion main body 65. The fixed portion main body 65 is connected to a motor 66 as a drive source. The motor 66 is attached to the processing unit main body 55. The heater 63 rotates by a predetermined angle by driving the motor 66 based on the signal from the control unit C (see FIGS. 6 to 11).

  As the heating means provided in the heater 63, known heating means such as resistance heating and induction heating can be used. The thermosetting resin or thermoplastic resin impregnated into the fiber bundle F may be impregnated before being wound around the liner 1 after the fiber bundle F is supplied from the bobbin 71 (71A, 71B, 71C, 71D). Alternatively, a prepreg impregnated with a thermosetting resin or a thermoplastic resin in advance may be used. Further, a resin for fixing the fiber bundle F to the outer peripheral surface 1S of the liner 1 may be partially impregnated.

  The gripping part 64 grips the fiber bundle F when the fiber bundle F is fixed to the outer peripheral surface 1S of the liner 1. The gripping part 64 includes a chucker 67 and a moving part 68. The chucker 67 has an opening / closing opening (not shown), approaches the fiber bundle F supplied from the fiber supply guide 72 of the winding table 34 with the opening / closing opening wide open, and the fiber bundle F in the opening / closing opening. Is captured, the opening / closing port is closed and the fiber bundle F is gripped.

  The moving unit 68 switches the position of the chucker 67 with respect to the heater 63. The moving part 68 is an air cylinder, for example, and fixes the chucker 67 to the tip of the rod that expands and contracts. The moving unit 68 is attached to the processing unit main body 55. The position of the chucker 67 is switched by the moving unit 68 to the downstream side (see FIG. 6) and the upstream side (see FIG. 8) in the fiber bundle supply direction FA with respect to the heater 63. The chucker 67 can grip the fiber bundle F at any position.

  The cutter 62 cuts the fiber bundle F supplied from the fiber supply guide 72 of the winding table 34. The cutter 62 is provided so as to be able to advance and retreat with respect to the fixed portion main body 65. When cutting the fiber bundle F, the fiber bundle F is cut by protruding from the fixing portion main body 65. At the time of standby, it is retracted to a position where it is drawn into the fixed portion main body 65 and does not contact the fiber bundle F.

  The positional relationship between the winding table 34 and the fiber bundle processing device 50 will be described. In the positional relationship between the winding table 34 and the fiber bundle processing device 50 shown in FIG. 5, the position of the processing unit 51 is switched between the operating position PA and the retracted position PB. The position is switched between the operating position PA and the retracted position PB while the winding table 34 is stopped at the start and end of the hoop winding. However, even when the winding table 34 is stopped, if the posture (rotational position) of the winding table 34 is different from the posture (rotational position) shown in FIG. 5, bobbins 71A, 71B, 71C, 71D, There is a risk of interference with the fiber supply guide 72, the guide roller 73, and the fiber bundle F hung around these. Further, the processing unit 51 needs to perform an operation of gripping the fiber bundle F supplied from the fiber supply guide 72 of the winding table 34 and fixing it to the outer peripheral surface 1S of the liner 1.

  For this reason, in the present embodiment, while the processing unit 51 is switched between the operating position PA and the retracted position PB and while the processing unit 51 is positioned at the operating position PA, as shown in FIG. It is assumed that the attitude (rotational position) of the winding table 34 is maintained so that the processing unit 51 is positioned between the bobbin 71A and the bobbin 71D. Hereinafter, the posture (rotational position) of the winding table 34 will be described as a processing stop posture.

  Next, the operation of the fiber bundle processing device 50 in the hoop winding of the FW device 100 configured as described above will be described. The liner 1 used in this embodiment includes a first cylindrical portion 1A having a constant radius, a dome portion 1B provided at both ends of the cylindrical portion 1A, and a second cylindrical shape provided at the end of the dome portion 1B. It is assumed that a portion 1C is provided (see FIG. 3). The liner 1 is attached to the liner transfer device 20, and the hoop winding is performed following the helical winding performed previously, and then the helical winding is further performed. The controller C is provided with hoop winding conditions, i.e., the moving speed of the hoop winding device 30, the rotational speed of the winding table 34, the number of times the hoop winding device 30 is reciprocated, and the winding conditions such as the moving distance of the hoop winding device 30. Is previously input by the operator. The controller C controls the driving of the hoop winding device 30 based on the input winding conditions as follows.

  When the helical winding before the hoop winding is completed, as shown in FIG. 1, the hoop winding device 30 moves from the standby position (see FIG. 3) along the front-rear direction of the FW device 100, and the hoop winding starts. Move to. In this embodiment, the hoop winding starts from one end of the cylindrical portion 1A of the liner 1. When the hoop winding device 30 moves, the winding table 34 is in the processing stop posture, and the processing unit 51 is in the retracted position PB (see FIG. 11). The chucker 67 is assumed to hold the fiber bundle F supplied from the fiber supply guide 72 of the winding table 34.

  As shown in FIG. 1, when the hoop winding device 30 reaches a position where the hoop winding starts, as shown in FIG. 6, the processing unit 51 moves to the operating position PA due to the swing of the arm 52. The position of the chucker 67 is on the downstream side of the fiber bundle supply direction FA with respect to the heater 63. The heater 63 is directed to the outer peripheral surface 1AS of the cylindrical portion 1A by the rotation of the fixing portion main body 65. The heater 63 brings the fiber bundle F into contact with the outer peripheral surface 1AS of the cylindrical portion 1A and heats the contact portion, whereby the thermosetting resin impregnated in the fiber bundle F is cured, and the end of the fiber bundle F is helically wound. Is fixed to the fiber bundle F wound around. The cutter 62 is drawn into the fixed portion main body 65 and retracts to a position where it does not contact the fiber bundle F.

  As shown in FIG. 7, when the end portion of the fiber bundle F is fixed to the outer peripheral surface 1AS of the cylindrical portion 1A, the processing portion 51 moves to the retracted position PB by the swing of the arm 52. When the processing unit 51 moves to the retracted position PB, the hoop winding device 30 starts winding the fiber bundle F. In the first few rounds, the tension of the fiber bundle F is set lower than the specified tension F, and the next fiber bundle F is wound on the fiber bundle F wound down in this state. Or it winds so that the next fiber bundle F may cross | intersect on the fiber bundle F wound below. After completing the first few turns, hoop winding is performed with the tension of the fiber bundle F as a specified tension.

  As shown in FIG. 2, the hoop winding device 30 moves in the right direction in the figure while rotating the winding table 34, so that the fiber bundle F is hoop-wound around the outer peripheral surface 1 AS of the cylindrical portion 1 A. In this state, the first hoop winding layer is formed. Subsequently, the second hoop winding layer is formed on the outer surface of the previous hoop winding layer by reversing the hoop winding device 30. Further, when forming a hoop winding layer, the hoop winding is performed a required number of times by reciprocating the hoop winding device 30.

  When the necessary number of hoop windings are completed, the winding table 34 is stopped in the processing stop posture as shown in FIG. The processing unit 51 moves from the retracted position PB toward the operating position PA. The position of the chucker 67 is on the upstream side in the fiber bundle supply direction FA with respect to the heater 63. With the opening / closing opening of the chucker 67 opened widely, the fiber bundle F supplied from the fiber supply guide 72 of the winding table 34 is brought close to the fiber bundle F. When the fiber bundle F is captured in the opening / closing opening, the opening / closing opening is closed and the fiber bundle F is separated. Hold it. The heater 63 is configured not to contact the fiber bundle F toward the outer peripheral surface 1AS of the cylindrical portion 1A by the rotation of the fixing portion main body 65. The cutter 62 is drawn into the fixed portion main body 65 and retracts to a position where it does not contact the fiber bundle F.

  In FIG. 8, the chucker 67 grips the fiber bundle F, and then, as shown in FIG. 9, the processing unit 51 moves to the operating position PA. The position of the chucker 67 is on the upstream side in the fiber bundle supply direction FA with respect to the heater 63, as shown in FIG. The heater 63 is also directed to the outer peripheral surface 1AS of the cylindrical portion 1A. The heater 63 brings the fiber bundle F into contact with the outer peripheral surface 1AS of the cylindrical portion 1A and heats the contact portion, whereby the thermosetting resin impregnated in the fiber bundle F is cured, and the fiber bundle F is first wound in a hoop. It is fixed to the wound fiber bundle F. The cutter 62 is still drawn into the fixed portion main body 65 and retracted to a position where it does not contact the fiber bundle F.

  As shown in FIG. 10, when the fiber bundle F is fixed to the fiber bundle F previously wound in the hoop winding by the heater 63, the cutter 62 protrudes with respect to the fixing portion main body 65, and the fiber bundle F is fixed. The fiber bundle F is cut on the upstream side of the fiber bundle supply direction FA from the (fixed position). Thereby, the fiber bundle F wound with the hoop is fixed to the outer peripheral surface 1AS of the tubular portion 1A at the end position of the hoop winding.

  10, when the cutter 62 cuts the fiber bundle F, as shown in FIG. 11, the processing unit 51 moves from the operating position PA toward the retracted position PB. The chucker 67 holds the fiber bundle F supplied from the fiber supply guide 72 of the winding table 34. As shown in FIG. 3, the hoop winding device 30 moves along the front-rear direction of the FW device 100 from the position where the hoop winding is finished, and moves to the standby position. When the next helical winding is completed at this position and the hoop winding is performed again, the next hoop winding is performed from the state shown in FIGS. 1 and 6.

  The FW device 100 according to the present embodiment described above has the following effects.

  When starting the hoop winding, the end of the fiber bundle F is fixed to the outer peripheral surface 1S of the liner 1 at the hoop winding start position, and the hoop winding is started. When ending the hoop winding, the fiber bundle F is fixed to the outer peripheral surface 1S of the liner 1 at the end position of the hoop winding, and the fiber bundle F is cut. In this way, the fiber bundle F is fixed to the outer peripheral surface 1S of the liner 1 only when hoop winding is performed, and the hoop winding fiber bundle F does not interfere with the helical winding device 40 when helical winding is performed. Winding can be performed alternately and continuously. Further, when starting the hoop winding, since the end of the fiber bundle F is fixed to the outer peripheral surface 1S of the liner 1 at the hoop winding start position and the hoop winding is started, sweet winding or combination winding of the fiber bundle F is performed. This is unnecessary and the time required for hoop winding can be shortened. In addition, since sweet winding or combination winding of the fiber bundle F is unnecessary, the usage amount of the fiber bundle F can be reduced, and the manufacturing cost can be reduced.

  The fiber bundle F contains a thermosetting resin, and fixing of the fiber bundle F to the outer peripheral surface 1S of the liner 1 brings the fiber bundle F into contact with the outer peripheral surface 1S of the liner 1 and heats the contact portion. Thereby, a thermosetting resin hardens | cures and a fiber bundle can be fixed to the outer peripheral surface 1S of the liner 1. FIG.

  After the fiber bundle F is fixed to the outer peripheral surface 1S of the liner 1, hoop winding is started in a state where the tension of the fiber bundle F is lowered below a predetermined tension, and a predetermined number of turns are performed so that the fiber bundles F overlap. Thereby, it can prevent that the fixing | fixed part of the fiber bundle F is pulled | pulled by high tension, and remove | deviates. In addition, after performing the hoop winding with a predetermined number of turns so that the fiber bundles F overlap, the hoop winding is performed with the tension of the fiber bundles F as a specified tension, so that a reinforcing layer having a specified strength can be formed. .

  After the fiber bundle F is fixed to the outer peripheral surface 1S of the liner 1, the hoop winding is started in a state where the tension of the fiber bundle F is lowered below a predetermined tension, and the hoop winding is performed so that the fiber bundle F intersects. Thereby, since the fiber bundle F wound down is fastened and fixed by the fiber bundle F wound up, it can prevent reliably that the fixing | fixed part of the fiber bundle F is pulled | pulled by high tension and remove | deviated.

  When starting the hoop winding, the gripping portion 64 grips the fiber bundle F on the downstream side of the fiber bundle supply direction FA with respect to the heater 63, brings the fiber bundle F into contact with the outer peripheral surface 1 </ b> S of the liner 1, and the contact portion is the heater. By heating at 63, the end portion of the fiber bundle F can be fixed to the outer peripheral surface 1S of the liner 1 at the hoop winding start position. Further, when the hoop winding is finished, the fiber bundle F is gripped on the upstream side of the fiber bundle supply direction FA with respect to the heater 63, the fiber bundle F is brought into contact with the outer peripheral surface 1S of the liner 1, and the contact portion is heated by the heater 63. By heating, the fiber bundle F can be fixed to the outer peripheral surface 1S of the liner 1 at the end position of the hoop winding, and the fiber bundle F can be cut by the cutter 62. Thus, since the start and end of hoop winding are automated and performed quickly, the time required for hoop winding can be shortened.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the positional relationship between the winding table 34 and the fiber bundle processing device 50 is not limited to the positional relationship shown in FIG. 5, the winding table 34 and the fiber bundle processing device 50 do not interfere with each other, and the winding is performed. Any positional relationship may be employed as long as the fiber bundle F supplied from the fiber supply guide 72 of the table 34 can be gripped. Further, if the structures and arrangements of the winding table 34 and the fiber bundle processing device 50 are different, the positional relationship is different.

  In the present embodiment, the grip portion 64 moves with respect to the heater 63, but the heater 63 may move with respect to the grip portion 64.

  In this embodiment, the FW device 100 including the hoop winding device 30 and the helical winding device 40 has been described. However, the present invention may be applied to a FW device dedicated to hoop winding.

DESCRIPTION OF SYMBOLS 1 Liner 1S Outer peripheral surface 10 Main base 20 Liner transfer apparatus 30 Hoop winding apparatus 33 Hoop winding apparatus 34 Winding table 40 Helical winding apparatus 50 Fiber bundle processing apparatus 51 Processing part 52 Arm 53 Drive part 61 Fixing part 62 Cutter 63 Heater 64 Grasping part 100 Filament winding device F Fiber bundle C Control part

Claims (7)

A filament winding method for performing a hoop winding process,
The hoop winding step
A first step of fixing the end of the fiber bundle to the liner surface at the start position of the hoop winding;
A second step of hoop-winding a fiber bundle having an end fixed to the liner surface in the first step;
A third step of fixing the fiber bundle hoop-wound in the second step to the liner surface at the end position of the hoop winding;
A fourth step of cutting the fiber bundle on the upstream side in the fiber bundle supply direction from the position where the fiber bundle is fixed in the third step;
A filament winding method comprising: The filament winding method according to claim 1,
The fiber bundle includes a thermosetting resin or a thermoplastic resin,
In the filament winding method, the fixing of the fiber bundle to the liner surface in the first step and the third step includes bringing the fiber bundle into contact with the liner surface and heating the contact portion. The filament winding method according to any one of claims 1 and 2,
The second step includes
A fourth step of starting the hoop winding in a state where the tension of the fiber bundle is lower than the prescribed tension, and performing a predetermined number of turns of the hoop so that the fiber bundles overlap,
A fifth step of performing hoop winding with the tension of the fiber bundle as a specified tension;
A filament winding method comprising: The filament winding method according to claim 3,
In the fourth step, the hoop winding is performed so that the fiber bundles intersect each other. A filament winding device for winding a fiber bundle around a liner surface with a hoop winding device,
The hoop winding device
A winding part for hoop winding the fiber bundle around the liner surface;
A fixing part for fixing a fiber bundle to the liner surface;
A cutter for cutting the fiber bundle;
A first fixing operation by the fixing unit for fixing the end of the fiber bundle to the liner surface at the start position of the hoop winding, a winding operation by the winding unit for hoop winding the fiber bundle having the end fixed to the liner surface; A second fixing operation by the fixing portion for fixing the fiber bundle wound by the hoop at the end position of the hoop winding to the liner surface, and a position in the fiber bundle supply direction than the position at which the fiber bundle is fixed by the second fixing operation. A control unit for controlling the cutting operation by the cutter that cuts the fiber bundle on the upstream side, and
A filament winding apparatus characterized by comprising: The filament winding apparatus according to claim 5,
The fiber bundle includes a thermosetting resin or a thermoplastic resin,
The filament winding apparatus according to claim 1, wherein the fixing unit heats the contact portion by bringing the fiber bundle into contact with the liner surface. The filament winding apparatus according to claim 6, wherein
The fixing part is
A heater for heating the fiber bundle;
A gripping part capable of gripping the fiber bundle on both the upstream side and the downstream side in the fiber bundle supply direction with respect to the heater,
In the first fixing operation, the control unit performs the first holding operation by the holding unit that holds the fiber bundle downstream of the fiber bundle supply direction with respect to the heater, and the second fixing operation. A filament winding apparatus characterized by controlling a second gripping operation by the gripping portion that grips the fiber bundle on the upstream side in the fiber bundle supply direction with respect to the heater.

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