JPH044110B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to FRP prepreg tape (hereinafter referred to as FRP prepreg tape).
(referred to as tape), especially FRP
The present invention relates to an automatic cutting device that cuts a tape into a predetermined size and shape when automatically attaching the tape to a predetermined mold.

[Conventional technology]

First, FRP tape is made by arranging carbon fibers, Kevlar fibers, glass fibers, etc. in a certain direction or forming a fabric, and impregnating this with a thermosetting resin. And this kind of
Recently, FRP tape has been widely used in aircraft because it is possible to obtain a laminate with good dimensional accuracy and strength by cutting the tape appropriately, laminating it in multiple layers into a predetermined shape, and then applying heat and pressure. It has come to be widely used in various applications such as the bodies of automobiles and small ships.

By the way, in the production of the above-mentioned FRP tape laminate, generally, a protective sheet is attached to one side and the wrapped FRP tape is first cut to a predetermined size.
This is done by sequentially pressing and pasting the cut FRP tape onto a predetermined mold using a pasting roll. In this case, you can improve workability and
In order to accurately laminate FRP tapes according to the predetermined mold shape, the FRP tape must be pasted with only the FRP tape cut, without cutting the protective sheet, so that the protective sheet can be peeled off continuously. It is necessary that the cutting is performed quickly while being fed to the roll, and that the cutting shape is set to a shape that adapts to a predetermined mold.

In order to meet these demands, the applicant has previously developed an automatic cutting device equipped with a reciprocating device that moves the cutting blade in a cutting motion and a rotational drive device that sets the cutting angle of the cutting blade, and has filed a patent application. (Tokuko Showa 61
-25519 Publication). That is, according to the automatic cutting machine, the receiving plate and the cutting blade are arranged facing each other with a predetermined spacing between them, and when the cutting blade is moved forward to cut the FRP tape, the distance between the cutting edge and the receiving plate is adjusted. An adjusting member that can be set to a thickness slightly smaller than the thickness of the protective sheet is provided, and the cutting blade is further coupled to a required reciprocating drive device via a link mechanism, and a rotary drive device is attached to the cutting blade. Ori,
By configuring it like this, you can
The cutting blade can be quickly reciprocated to a predetermined cutting position of the FRP tape to cut only the FRP tape, and the cutting angle can be arbitrarily set. In this way, the lamination workability and lamination accuracy of FRP tapes have been improved.

[Problems to be solved by the present invention]

However, the above-mentioned cutting device still has some problems as described below.

In other words, the aforementioned cutting device has a cutting blade that
Since it is configured with a linear wide blade that cuts across the FRP tape in the width direction, firstly, the cutting shape of the FRP tape is limited to a straight line, and secondly, the cutting angle can be set arbitrarily. However, if this cutting angle is set in a direction that stands out in the longitudinal direction of the tape, the blade width of the cutting blade will become significantly longer, so in practice there are no restrictions on the setting of the cutting angle. Thirdly, when cutting particularly wide tapes, a special wide cutting blade is required.

By the way, when manufacturing an aircraft wing by laminating FRP tape, for example, the wing is thick at the connection to the fuselage and becomes thinner toward the tip, and the wing surface has several contour lines. It is composed of For this reason, when laminating FRP tapes, it is necessary to partially adjust the number of laminated sheets and at the same time cut the tape into various shapes such as a steep diagonal cut shape, a convex V shape, a concave V shape, etc. is required. However, in this case, the above-mentioned first or second difficulty means that such a request cannot be met. On the other hand, the above-mentioned second or third difficulty of increasing the size of the cutting blade increases the size and weight of the entire cutting device, increasing the price of the device, and as will be discussed later.
This makes it disadvantageous to assemble the FRP tape into an automatic pasting device.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic cutting device for FRP tape that can arbitrarily set cutting dimensions and cutting shapes and can be constructed to be small and lightweight.

[Means for solving problems]

In order to achieve the above object, the present invention relates to
The automatic cutting device for FRP tape places a receiving plate on the protective sheet side of the FRP tape to which the protective sheet is affixed and is transported in the Z direction, and also cuts one or two pieces opposite to this receiving plate. A cutting blade vibrator that holds the cutting blade so as to be movable back and forth in the Y direction and performs the cutting operation, with the blade arranged at a predetermined distance from the FRP tape, and this cutting blade vibrator is rotatably supported via a rotating sleeve. and a cutting blade rotation device that sets the cutting blade at a predetermined cutting angle; and a cutting blade rotation device that supports the cutting blade rotation device so as to be able to approach and separate in the Y direction via a spacing frame body, and the cutting blade when cutting the tape. A cutting blade approaching/separating device that sets a predetermined distance from the pedestal, and a cutting blade traveling device that supports the cutting blade approaching/separating device so as to be movable in the X direction via a traveling frame and feeds the cutting blade for cutting. It is characterized by having the following.

In this case, if the cutting blade is configured as a knife-shaped cutting blade with a pointed cutting edge and an ultrasonic vibrator is used as the cutting blade vibrator, the cutting blade can easily and accurately cut the FRP tape. The wear of the blade is reduced and its sharpness can be extended for a long time.
In addition, the cutting blade rotation device is configured such that the rotating shaft of the electric motor fixed to the contact/separation frame body and the rotating sleeve rotatably supported by the contact/separation frame body are connected via a pulley and a belt. The separating device consists of a fluid pressure driven cylinder installed between the approaching/separating frame and the traveling frame, and the approaching/separating guide shaft, and the cutting blade traveling device is constructed between the fixed base that fixes the receiving plate and the traveling frame. It is preferable to construct the motor-driven pinion rack or screw mechanism mounted on the motor and the traveling guide rail.

〔Example〕

Next, embodiments of the automatic cutting device for FRP tape according to the present invention will be described in detail below with reference to the accompanying drawings.

The automatic cutting device 10 is an FRP cutter to which a protective sheet 12 made of paper or plastic sheet is attached.
A pedestal 16 on which the tape 14 is placed, a fixed pedestal 18 to which this pedestal is fixed, a cutting blade 20 that is placed facing the pedestal 16 and spaced apart from the FRP tape 14 by a predetermined distance La, and this cutting blade 20. an ultrasonic vibrator 22 that holds the blade 20 so as to be movable back and forth in the Y direction and performs a cutting operation; and a cutting blade 20 that rotatably supports the ultrasonic vibrator 22 via a rotating sleeve 24.
at a predetermined cutting angle θ (see Figure 3 or Figure 4)
The cutting blade rotation device 26 is set to 1, and the cutting blade rotation device 26 is supported via a contact/separation frame 28 so as to be able to approach and separate in the Y direction, and the cutting blade 20 is set at a predetermined distance from the pedestal 16 when cutting the tape. A cutting blade contacting/separating device 30 set to dimension Lb (see Fig. 2), and a cutting device supporting the cutting blade contacting/separating device 30 via a traveling frame 32 so as to be movable in the X direction and feeding the cutting blade 20 for cutting. It is composed of a blade traveling device 34. In addition, FRP tape 1
4 is Z from the front side of the paper to the back side in the figure.
Direction: Run vertically. Then, this automatic cutting device 10 is assembled via a fixing base 18 to a main body (indicated by a two-dot chain line) of an automatic pasting device 70, which will be described later.

To explain in more detail, the cutting blade rotation device 26 is
A pulley 38 attached to the rotating shaft of an electric motor 36 fixed to the separation frame 28 and the outer peripheral surface of the rotating sleeve 24 rotatably supported within the holder block 40 of the separation frame 28 via a bearing 40a. A belt 44 is stretched between the pulley 42 and the attached pulley 42. Therefore, in this cutting blade rotation device 26, the rotating sleeve 24 is rotated by the rotation of the electric motor 36, and the cutting blade 20 is rotated by a required angle via the ultrasonic vibrator 22 held inside the rotating sleeve 24. can be set to a predetermined cutting angle. Next, the cutting blade approaching/separating device 30 fixes the tip of the operating piston 46a of the pneumatic sill 46 fixed to the traveling frame 32 to the approaching/separating frame 28 via the fixing nut 46b, and also fixes it to the traveling frame 32. The guide shaft 48 is slidably inserted into guide holes 50 provided at both ends of the detachable frame body 28. Therefore, in this cutting blade contact/separation device 30, the contact/separation frame 28 is moved horizontally in the Y direction with respect to the traveling frame 32, that is, with respect to the pedestal 16 by the operation of the pneumatic cylinder 46, and the cutting blade 20 and the pedestal are moved horizontally in the Y direction. The distance between the cutting edge 20a of the cutting blade 20 and the plate 16 is the normal dimension La shown in FIG. 1 and the tape cutting dimension Lb shown in FIG. It comes into contact with and separates from the dimension that bites in by S. The cutting blade traveling device 34 also includes a pinion 54 attached to a rotating shaft of an electric motor 52 fixed within the fixed base 18.
A driving pinion rack formed by a rack 56 provided on the side protruding portion 32a of the traveling frame 32, a roller (not shown) provided on the fixed base 18, and a rail 58 provided on the traveling frame protruding portion 32a. and a guide rail formed therein. Therefore,
This cutting blade traveling device 34 horizontally moves the traveling frame 32 between the left side position shown by a solid line and the right side position shown by a two-dot chain line by rotation of an electric motor 52, and moves the cutting blade 20 across the width of the FRP tape 14. It is possible to feed cutting across the direction. The cutting blade traveling device 34 has a ball screw disposed horizontally passing through the traveling frame protrusion 32a in place of the drive pinion rack in this embodiment, and this ball screw is driven by an electric motor. It may be configured as follows.

Further, the cutting edge 20 is formed into a small knife-like cutting edge having a cutting edge 20a (see FIG. 2),
The material thereof is preferably made of a superhard metal such as tungsten carbide. Further, the frequency of the ultrasonic transducer 22 is preferably set to about 40 KHz. With this configuration, the cutting blade 20 can easily and accurately cut the FRP tape 14 even in the case of a hard FRP tape made of carbon fiber, etc., and the protective sheet 12 can be easily cut from the tape 14 when cutting the tape.
is not peeled off. In addition, wear of the cutting edge 20 is reduced and its cutting quality is extended for a long time. In addition,
The fact that the protective sheet is not peeled off from the tape during cutting is advantageous when winding up and collecting the used protective sheet when the automatic cutting device is incorporated into an automatic pasting device that will be described later.

When cutting the FPR tape 14 with the automatic cutting device 10 having such a configuration, first, the cutting blade approaching/separating device 30 and the rotating device 26 are operated at the position shown in FIG. 1 of the cutting blade 20. , second
As shown in Fig. 3, the cutting edge 2 of the cutting blade
The separation dimension of 0a from the pedestal 16 is set at the time of cutting separation dimension Lb, that is, the position where the cutting edge 20a should be bitten into the protective sheet 12 by a minute dimension S, and the angle of the cutting blade 20 is set to a predetermined cutting angle θ. do. Next, the ultrasonic vibrator 22 is activated to give the cutting blade 20 a reciprocating cutting motion in the Y direction, and
By operating the traveling device 34, the cutting blade 20 cuts the FRP tape 14 at a predetermined cutting starting point A.
The cutting blade 20 is moved to the right in the X direction in the figure so as to cut into the tape 14. As a result, the cutting blade 20 runs along the entire width of the FRP tape 14 while cutting only the FRP tape 14 without cutting the protective sheet 12, and cuts the FRP tape 14 along the cutting line AB.
Cut the tape 14 completely. In this case, as described above, the protective sheet 12 is
Since it will not be peeled off from the FRP tape 14,
To make the operability of an automatic FRP tape pasting device 70 advantageous. Next, the ultrasonic vibrator 22 of the cutting blade 20 that has completed cutting is stopped, and the cutting operation is terminated.
After the distance from the pedestal 16 is set to the normal dimension La via the approach/separation device 30, the traveling device 34
is returned to the original position shown in FIG.

Here, the above-mentioned cutting angle θ is determined by the correlation ratio N (V _x /V _z ) between the horizontal running speed V _x of the cutting blade 20 in the X direction and the vertical running speed V _z of the FRP tape 14 in the Z direction. Therefore, in the cutting shape shown in FIG. 4 as an example, the steep oblique cutting line AC indicates the case where the correlation ratio N is small and the cutting angle θa is set large, and the oblique cutting line ADE is the same as that of the cutting line AD. Between the horizontal cutting lines AF, the correlation ratio N is relatively large and the cutting angle θb is set relatively small, and between the cutting lines DE, the cutting angle is set to θa.
makes the correlation ratio N infinite, that is, FRP tape 14
This figure shows the case where the vehicle is cut while the vehicle is stopped running. In the illustrated example, each cutting line is straight, but if the correlation ratio N is changed sequentially during cutting, the cutting angle θ is changed accordingly, so in this case, the cutting line is curved. It is possible to obtain a cut shape. In this case, the angle of the cutting edge 20 is also sequentially changed in accordance with the cutting angle θ.

The automatic cutting device 10' shown in FIG. 5 shows an embodiment in which two sets of cutting blade devices are provided. That is, for one cradle 16 fixed on the fixed pedestal 18,
Two cutting blades 62a, 62b are arranged via two symmetrically arranged contact/separation frames 64a, 64b and running frames 66a, 66b. Although not shown, these cutting blades 62a and 62b are each provided with an ultrasonic vibrator, a rotation device, a contact/separation device, and a traveling device similar to those in the previous embodiment.

In the automatic cutting device 10' having such a configuration, when one of the cutting blade devices is retracted to the outer end of the traveling frame, the above-mentioned automatic cutting is performed by the other cutting blade device. A cutting operation similar to that of device 10 is performed, but when both cutting blade devices are used, an operation other than the above-mentioned cutting operation is performed, and therefore a cut shape other than the above-mentioned cut shape is obtained.

That is, FIG. 6 shows both cutting edges 62a and 62b.
This shows the case where the FRP tape 14 is run from symmetrical cutting points G and H to the central cutting point with the same speed correlation ratio N, and the cut shape is formed into a symmetrical concave V-shape. ing. In this case, in order to avoid interference between the two cutting edges 62a and 62b, the cutting depth of one cutting edge 62b is set to have different phases.
The cut is made when the other cutting edge 62a reaches position G'. Next, FIG. 7 shows both cutting edges 62a and 62b.
This shows a case in which the FRP tape 14 is run from the center cutting point J to the left and right cutting points K and L with different speed correlation ratios N, respectively, and the cutting shape is formed into an asymmetrical convex V shape. ing. In this case as well, the cutting depth of the cutting edge 62a is the same as above.
2b reaches position L'. In this case, it goes without saying that various cutting shapes can be obtained by variously changing the speed correlation ratio N. Note that the same cutting operation can be performed by arranging two cutting devices 10 shown in FIG. 1 in series instead of the cutting device 10' shown in FIG. 5.

As is clear from the above, the automatic FRP tape cutting device according to the present invention continuously feeds out the FRP tape together with the protective sheet, and sequentially cuts only the FRP tape into any predetermined shape without cutting the protective sheet. In addition, since the cutting blade is formed into a small cutting blade, its shape and weight are small and lightweight, and it can be suitably applied to automatic pasting equipment that constructs FRP tape laminates. . That is, FIG. 8 shows a schematic configuration diagram of an automatic pasting device, which includes an FRP tape supply reel 72 on which the FRP tape 14 with the protective sheet 12 pasted on one side is wound, and the FRP tape 14. A pair of rolls consisting of a feed roll 74 and a pressing roll 76 that reversibly feed out FRP tape, an automatic cutting device 10 (10') according to the present invention, a heater 78, and separation of cut FRP tape 14 from protective sheet 12. It consists of an adhesive roll 82 that presses and adheres the protective sheet 12 to a predetermined mold 80, and a winding roll 84 that winds up and collects the protective sheet 12. As is clear from the figure, automatic cutting device 10 (10')
As mentioned above, since it is small and lightweight, it is suitably incorporated into the automatic pasting device 70. In addition,
On one side of the pasting roll 82, there is a mark after the cut part.
An auxiliary roll 86 for wrapping the FRP tape is removably assembled.

The automatic pasting device configured in this way is connected to a predetermined drive device (not shown), and is connected to the X-axis, Y-axis,
The FRP tape 14 is placed vertically and horizontally on a predetermined mold 80 without any gaps (and for example (according to contour lines) to form a laminate of several to several tens of layers. Therefore, control of this automatic pasting device can be realized programmably using known NC control.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments.
Of course, various design changes can be made without departing from the spirit of the invention.

〔Effect of the invention〕

As explained above, the automatic cutting device for FRP tape according to the present invention has a receiving plate disposed on the protective sheet side of the FRP tape, and one sheet facing the receiving plate.
A cutting blade oscillator that is provided with one or two small cutting blades, a cutting blade vibrator that causes the cutting blade to perform a cutting operation, and a cutting blade rotating device that sets the angle of the cutting blade to a predetermined cutting angle; A cutting blade approaching/separating device that sets the cutting edge of the cutting blade to slightly bite into the protective sheet, and a cutting blade traveling device that moves this cutting blade in a direction perpendicular to the direction in which the FRP tape is supplied are attached. When cutting FRP tape, it is possible to cut only the FRP tape without cutting the protective tape, and the cutting shape can be arbitrarily set, and the cutting device can be configured to be small and lightweight. .

Therefore, the cutting device can be suitably incorporated into an automatic FRP tape pasting device, and when forming a laminate of FRP tape, the laminate can have a tapered shape and a contoured surface, for example. In the case of aircraft wings, etc., the FRP can be cut into a desired shape without any gaps on a mold of a predetermined shape and according to the predetermined contour lines.
A required number of tape cut pieces can be easily and precisely stacked.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view illustrating an embodiment of an automatic cutting device for FRP tape according to the present invention, and FIG. 2 is a partially cutaway plan view of an FRP tape between a cutting blade and a receiving plate in the automatic cutting device shown in FIG. 1. A plan view showing the separation dimension during cutting, Fig. 3 is a view taken from the direction of the arrow in Fig. 2, and Fig. 4 is a plan view showing the separation dimension during cutting.
Plan view explaining the cutting situation of FRP tape, 5th
6 and 7 are plan views illustrating another embodiment of the automatic cutting device for FRP tape according to the present invention.
Both figures show FRP cut by the cutting device shown in Figure 5.
A plan view illustrating the tape cutting situation, FIG. 8 shows an FRP tape automatic cutting device according to the present invention installed.
FIG. 1 is a schematic explanatory diagram of an automatic FRP tape pasting device. 10, 10'... automatic cutting device, 12... protective sheet, 14... FRP tape, 16... pedestal,
18... Fixed base, 20, 62a, 62b... Cutting blade, 22... Ultrasonic vibrator, 24... Rotating sleeve, 26... Cutting blade rotation device, 28, 64a, 64
b... Approach/separation frame body, 30... Cutting blade approach/separation device, 32,
66a, 66b... Traveling frame, 34... Cutting blade traveling device, 36, 52... Electric motor, 38, 42... Pulley, 40... Holder block, 44... Belt, 46... Pneumatic sill, 48... ...Guide shaft, 50...Guide hole, 54...Pinion, 56
... Rack, 58 ... Rail, 70 ... Automatic pasting device, 72 ... FRP tape supply reel, 74 ...
...Feed roll, 76...Press roll, 78
... Heater, 80 ... Mold, 82 ... Sticking roll, 84 ... Take-up reel, 86 ... Auxiliary roll, V _x ... X-direction horizontal running speed, V _z ... Z-direction vertical running speed, θ... Cutting angle, La... Normal distance dimension, Lb... Cutting distance dimension, S... Minute dimension.

Claims (1)

[Claims] 1. A protective sheet that is transferred in the Z direction is attached.
A receiving plate is arranged on the protective sheet side with respect to the FRP tape, and one or two cutting blades are arranged opposite to this receiving plate at a predetermined distance from the FRP tape, and the cutting blades are moved back and forth in the Y direction. a cutting blade oscillator that is capable of holding the cutting blade and performing a cutting operation; a cutting blade rotating device that rotatably supports the cutting blade oscillator via a rotating sleeve and sets the cutting blade at a predetermined cutting angle;
A cutting blade approaching/separating device that supports the cutting blade rotating device so as to be able to approach and separate in the Y direction via a connecting/separating frame body, and sets the cutting blade to a predetermined distance from the pedestal when cutting the tape; An automatic cutting device for FRP tape, characterized in that it is provided with a cutting blade traveling device which supports a cutting blade approaching/separating device so as to be movable in the X direction via a traveling frame and which feeds the cutting blade for cutting. 2. The automatic cutting device for FRP tape according to claim 1, wherein the cutting blade is a small knife-like cutting blade having a pointed cutting edge at one end edge. 3. The automatic cutting device for FRP tape according to claim 1, wherein the cutting blade vibrator is an ultrasonic vibrator. 4. In the automatic cutting device according to claim 1, the cutting blade rotation device connects the rotating shaft of the electric motor fixed to the separation frame body and the rotating sleeve rotatably supported to the separation frame body by means of a pulley and Automatic cutting device for FRP tape connected via a belt. 5. In the automatic cutting device according to claim 1, the cutting blade contact/separation device is composed of a fluid pressure driven cylinder and a contact/separation guide shaft installed between the contact/separation frame and the traveling frame, and An automatic cutting device for FRP tape, which is configured such that the distance between the cutting part of the cutting blade and the receiving plate is slightly smaller than the thickness of the protective sheet. 6. In the automatic cutting device according to claim 1, the cutting blade traveling device is composed of a motor-driven pinion rack and a traveling guide rail installed between a fixed base for fixing the receiving plate and a traveling frame. Naru FRP
Automatic tape cutting device. 7. In the automatic cutting device according to claim 1, the cutting blade traveling device is composed of an electric motor drive screw mechanism installed between a fixed base for fixing the receiving plate and a traveling frame, and a traveling guide rail. Automatic cutting device for FRP tape.