KR20220134222A - CFRP Cutting Apparatus - Google Patents

Abstract

The present invention relates to an apparatus for cutting carbon fibers used in CFRP production into a specific pattern, wherein a cutting plate is made of metal, and an ultrasonic knife cuts the carbon fibers by forming grooves identical to the specific pattern so that the carbon fibers can be cut in the specific pattern while the ultrasonic knife moves through the carbon fibers. Therefore, when the pattern is not changed, an effect of permanently using the cutting plate can be achieved.

Description

CFRP Cutting Apparatus

The present invention relates to an apparatus for cutting carbon fibers used for CFRP production in a specific pattern.

In order to solve the current energy, environmental, and resource problems faced by industries such as automobiles, aircraft, ships, and railroad vehicles, new materials and processing technologies that can realize weight reduction, high performance, high efficiency, and resource saving and recycling development is a challenge.

In recent years, development of lightweight transport equipment is an urgent priority, and various composite materials are employed. Among them, CFRP has already been applied to many parts of the aircraft in the aircraft industry.

In order to manufacture CFRP, the carbon fiber shown in FIG. 7 is required, and the carbon fiber is cut to fit a specific pattern before manufacturing CFRP.

8 is a view showing a conventional general-purpose sheet cutting device. The conventional sheet cutting device is provided with a suction panel 12 having a suction hole 13 formed at a lower portion of the air permeable belt 21 for moving the sheet, and vacuum chamber 15 installed at the lower portion of the suction panel 12 . A configuration in which this is generated and the seat 4 is fixed by suction force is disclosed. In this way, the sheet 4 is cut in a state in which the sheet 4 is fixed to the air permeable belt 22, and the air permeable belt 22 generates a lot of cuts when the sheet is cut several times and must be replaced periodically. The breathable belt 22 is installed on the drive roller 21. In order to replace the breathable belt 22, the drive roller 21 is disassembled and replaced. There is a need for a solution for this.

In addition, conventionally, when cutting carbon fiber, it is placed on a material such as a non-woven fabric or bristle to cut the carbon fiber. Foreign substances such as dust or carbon fiber chips are caught between them and must be cleaned periodically.

Therefore, there is a need for a new type of cutting device that can be used permanently and does not require removal of foreign substances.

The matters described as the background art above are only for improving the understanding of the background of the present invention, and should not be taken as an acknowledgment that they correspond to the prior art already known to those of ordinary skill in the art.

KR 10-2042409

An object of the present invention is to provide a new type of CFRP cutting device equipped with a cutting plate that can be used permanently in order to solve the above problems.

The CFRP cutting device for cutting the carbon fiber into a specific pattern by fixing the carbon fiber includes: an ultrasonic knife for cutting the carbon fiber into the specific pattern; and a seating surface on which the carbon fiber is placed, and a groove of the same pattern as the specific pattern is formed in the seating surface to allow the blade tip of the ultrasonic knife to move through the carbon fiber during the cutting, vacuum a cutting plate in which a plurality of suction holes are formed on the seating surface so that the carbon fiber is in close contact with the seating surface; a cutting bed installed on the cutting plate and including a vacuum box communicating with the suction hole; and a vacuum pump connected to the vacuum box and sucking air inside the vacuum box so that the carbon fiber is in close contact with the cutting plate through the suction force generated from the suction hole.

In at least one embodiment of the present invention, the suction hole includes a plurality of pattern holes formed along the groove to correspond to the shape of the specific pattern on the inner edge or the outer edge of the groove on the seating surface.

In at least one embodiment of the present invention, the cutting plate also has a suction hole formed at the bottom of the groove.

In at least one embodiment of the present invention, the vacuum box has a partition wall formed in the inner space acting on the carbon fiber, and a plurality of the inner spaces divided by the partition wall are respectively connected to the vacuum pump.

In at least one embodiment of the present invention, the cutting plate is a metal material.

In at least one embodiment of the present invention, the supply roller for supplying the carbon fiber to the carbon fiber to the seating surface of the cutting plate; a pinch roller for moving the carbon fiber supplied from the supply roller to an upper surface of the cutting plate of the cutting bed; and a winding roller installed on the other side of the cutting bed to recover the cut and remaining carbon fibers.

In at least one embodiment of the present invention, a first inclined portion inclined downward in the traveling direction of the carbon fiber from the lower portion of the pinch roller is formed.

In at least one embodiment of the present invention, on the other side of the cutting bed, a second inclined portion inclined downwardly from one end of the cutting bed is formed so that the carbon fiber remaining after cutting flows down.

In at least one embodiment of the present invention, the winding roller is formed to be spaced apart from the second inclined portion at a set interval so that the carbon fiber is caught in a U shape between the end of the second inclined portion and the winding roller.

According to the CFRP cutting device having the structure as described above, the cutting plate is made of a metal material, and a groove is formed in the same way as the specific pattern so that the ultrasonic knife can cut the carbon fiber in a specific pattern while moving through the carbon fiber. The effect of permanently using the cutting plate when the pattern is not changed can be achieved.

1 is a view showing a cutting plate of a CFRP cutting device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line A - A of FIG. 1 .
3 is a view showing a state in which the cutting plate is installed in the CFRP cutting apparatus according to an embodiment of the present invention.
4 is a view showing a state in which carbon fibers are supplied to the cutting plate in the CFRP cutting apparatus according to an embodiment of the present invention.
5 is a view showing a state in which carbon fiber is cut by an ultrasonic knife in the CFRP cutting device according to an embodiment of the present invention.
6 is a view showing a state in which the carbon fiber is cut and the remaining carbon fiber moves in the CFRP cutting device according to an embodiment of the present invention.
7 is a view showing a conventional carbon fiber.
8 is a view showing a conventional general-purpose sheet cutting device.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms including an ordinal number such as “first” and “second” may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

The term “and/or” is used to include any combination of the plurality of items in question. For example, “A and/or B” includes all three cases such as “A”, “B”, and “A and B”.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

In the description of the embodiments, each layer (film), region, pattern or structures is referred to as “on” or “under” the substrate, each layer (film), region, pad or patterns. The description that it is formed on includes all those formed directly or through another layer. The criteria for “upper/upper” or “lower/lower” are based on the figure shown in the drawings for convenience, and are used only to indicate the relative positional relationship between the elements for convenience, and to limit the actual positions of the elements. should not be understood For example, "above B" only indicates that B is shown above A in the drawing, unless otherwise stated or unless A or B has to be located above B due to the nature of A or B, in the actual product, etc., B may be located under A, or B and A may be placed sideways left and right.

In addition, since the thickness or size of each layer (film), region, pattern, or structure in the drawings may be changed for clarity and convenience of description, it does not fully reflect the actual size.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings, but the same or corresponding components are given the same reference numerals regardless of the reference numerals, and the overlapping description thereof will be omitted.

The CFRP cutting apparatus according to an embodiment of the present invention includes an ultrasonic knife 100 , a cutting plate 120 , a cutting bed 180 and a vacuum pump 300 .

The ultrasonic knife 100 cuts the carbon fiber 170 in a specific pattern. In this embodiment, as shown in FIG. 1, a star-shaped pattern is exemplarily shown for easy explanation, but it can be formed in another pattern to cut the carbon fiber 170 when the present invention is actually practiced. have.

The ultrasonic knife 100 includes a blade 110 and an ultrasonic wave generator as shown in FIG.

Referring to FIG. 1 , the cutting plate 120 includes a seating surface 130 on which the carbon fiber 170 is placed.

On the seating surface 130, as shown in FIG. 2, when cutting, the tip of the blade 110 of the ultrasonic knife 100 penetrates the carbon fiber 170 in a direction perpendicular to the direction in which the blade 110 is penetrated. A groove 160 is formed to allow the tip to move without contacting the seating surface 130 .

Although not shown in the drawings, the cross section of the groove 160 may be formed in a V-shape or a U-shape.

The groove 160 is formed in the same pattern as the pattern for cutting the carbon fiber 170. For example, when the carbon fiber 170 is cut in the star shape shown in FIG. 1, the groove 160 is also formed in a star shape. The ultrasonic knife 100 is installed on a robot arm (not shown), and is set to move along the groove 160 by the robot arm.

In addition, a plurality of suction holes 140 are formed in the seating surface 130 so that the carbon fiber 170 is in close contact with the seating surface 130 by vacuum. The suction hole 140 is a suction hole in the periphery of the above-mentioned groove 160 to increase the fixing force of the carbon fiber 170 when the blade 110 of the ultrasonic knife 100 cuts the carbon fiber 170. 140) may be formed.

Specifically, as shown in FIG. 1 , the suction hole 140 has a plurality of patterns formed along the groove 160 to correspond to the shape of a specific pattern on the inner edge or the outer edge of the groove 160 on the seating surface 130 , as shown in FIG. 1 . A hole 150 may be included. When the ultrasonic knife 100 cuts the carbon fiber 170 along the groove 160, both sides of the groove 160 are in close contact with the pattern hole 150, so it is possible to achieve an effect as if the carbon fiber is pressed and supported. have.

In the cutting plate 120 , a suction hole 140 may be formed at the bottom of the groove 160 , and it is possible to achieve the effect of preventing the carbon fiber 170 placed on the groove 160 from sloshing during the cutting process.

The cutting plate 120 may be made of a metal material in which the surface of the seating surface 130 is smoothly polished. The metal material may be stainless steel or an aluminum material that is easy to recycle. In the case of aluminum material, when the carbon fiber 170 needs to be cut in a different pattern, the cutting plate 120 is melted, and then the pattern hole 160 and the suction hole 140 of the different pattern are formed again on the seating surface 130 to be reused. It is possible to achieve the effect possible, and since the strength is weak, it is possible to achieve the effect of easy processing the groove 160 , the suction hole 140 , and the pattern hole 160 .

According to an embodiment, the cutting plate 120 is not limited to the material and may be used by forming the suction hole 140 , the pattern hole 150 , and the groove 160 in a varnished wooden plywood or acrylic plate. .

The cutting bed 180 includes a vacuum box 190 , and a cutting plate 120 is installed on the vacuum box 190 . In this embodiment, the vacuum box 190 has an open top shape, the cutting plate 120 is installed while covering the top of the vacuum box 190, and the cutting plate 120 serves as a lid and the vacuum box 190 ) and the inside of the vacuum box 190 communicates with the outside only by the suction hole 140 and the pattern hole 150 .

When negative pressure is generated in the vacuum box 190 , external air flows into the suction hole 140 and the pattern hole 150 of the cutting plate 120 , and a suction force is generated, and the suction hole 140 and the pattern hole 150 . The carbon fiber 170 placed thereon is in close contact with the seating surface 130 .

According to an embodiment, the vacuum box 190 may have a closed shape, and in this case, a through hole is formed at the same position as the suction hole 140 or the pattern hole 150 formed in the cutting plate 120 at the top. The inner space of the vacuum box 190 and the outside of the vacuum box 190 may be in communication.

In addition, the vacuum box 190 has a partition wall 200 formed in an internal space acting on the carbon fiber 170 , and a plurality of internal spaces divided by the partition wall 200 is a vacuum pump to be described later by a nozzle 210 . (300) is connected to each. Since the inner space of the vacuum box 190 is divided in a checkerboard shape through the partition wall 200 , it is possible to achieve the effect of uniformly generating negative pressure on the cutting plate 120 .

The vacuum pump 300 is connected to the vacuum box 190 and generates a negative pressure inside the vacuum box 190 as it sucks air inside the vacuum box 190 and discharges it to the outside.

The CFRP cutting device of the present invention further includes a supply roller 220 , a pinch roller 230 and a winding roller 240 .

The supply roller 220 supplies the carbon fiber 170 to the seating surface 130 of the cutting plate 120 . The supply roller 220 is a pinch roller 230 to be described later so that the carbon fiber 170 can be supplied toward the pinch roller 230 without a device for pulling the carbon fiber 170 as shown in FIGS. 4 to 6 . It may be desirable to be positioned on top. The supply roller 220 may be rotated by itself by a first motor (not shown), and may be rotated while the carbon fiber is pulled by a pinch roller to be described later.

The pinch roller 230 moves the carbon fiber 170 supplied from the supply roller 220 to the upper surface of the cutting plate 120 of the cutting bed 180 . The pinch roller 230 is rotated by a second motor (not shown).

A first inclined portion 250 inclined downward in the traveling direction of the carbon fiber 170 is formed at the lower portion of the pinch roller 230 as shown in FIGS. 4 to 6 . The first inclined portion 250 is a cutting plate 120 by adding the force and self-weight of the pinch roller 230 to push the carbon fiber 170 without a device for pulling the carbon fiber 170 supplied by the pinch roller 230 . ) to ensure a stable supply. The pinch roller 230 may be in surface contact with the first inclined surface 260 of the first inclined part 250 , and the first inclined surface 260 may be in a state in which the surface thereof is smoothly polished.

On the other side (left side of the drawing) of the cutting bed 180, a second inclined portion 270 that is inclined downward from one end of the cutting bed 180 to the other end so that the carbon fibers 170 remaining after cutting flow downward by gravity. ) is formed. The second inclined portion 270 is installed on the other side of the cutting bed as shown in FIGS. 4 to 6 , and the carbon fiber 170 remaining after cutting is newly supplied by the pinch roller 230 before cutting carbon. As it is pushed out of the cutting plate 120 by the fiber 170, it is pulled downward by the weight of the carbon fiber 170 by the second inclined part 270, and the carbon fiber 170 remaining after the cutting is completed is newly supplied. It achieves the effect of solving problems such as wrinkles without being pushed out by the carbon fiber 170 that is used. The second inclined surface 280 of the second inclined portion 270 may be in a state in which the surface thereof is smoothly polished.

The winding roller 240 is installed on the other side (left side in the drawing) of the cutting bed 180 to recover the cut and remaining carbon fibers 170 . The winding roller 240 is rotated by a third motor (not shown).

As shown in FIGS. 4 to 6, the winding roller 240 has a second inclined portion ( 270) and spaced apart at a set interval. The carbon fiber 170 remaining after the cutting that is discharged downward through the second inclined portion 270 is stably stacked on the recovery barrel 290 so that a large amount of carbon fibers remaining after cutting in the recovery barrel 290 ( 170) achieves the effect of being able to contain it.

Next, a process in which the carbon fiber 170 is cut will be described with reference to FIGS. 3 to 6 .

Referring to FIG. 3 , the carbon fiber 170 is wound only on the supply roller 220 , and the cutting plate 120 on which a specific pattern is formed is installed on the vacuum box 190 .

Referring to FIG. 4 , the carbon fiber 170 is supplied from the winding roller 240 and supplied over the cutting plate 120 through the pinch roller 230 . When the carbon fiber 170 is supplied over the cutting plate 120 , a negative pressure is generated while the carbon fiber 170 is fixed.

Although not shown in the drawing at first, the carbon fiber 170 placed on the cutting plate 120 before the carbon fiber 170 is wound on the winding roller 240 is cut by the ultrasonic knife 100 as shown in FIG. The cut carbon fiber 170 moves separately, and the carbon fiber 170 remaining after cutting is wound around the winding roller 240 through the second inclined part 270 . Initially, the act of winding on the winding roller 240 may be performed by a worker.

After the carbon fiber 170 is cut, the carbon fiber 170 is again cut into a specific pattern through the above process, and the carbon fiber 170 remaining after cutting is recovered in the recovery container 290 .

In the above, the embodiment has been mainly described, but this is only an example and does not limit the present invention, and those of ordinary skill in the art to which the present invention pertains are not exemplified above in a range that does not depart from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiment may be implemented by modification. And the differences related to these modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

100: ultrasonic knife
110: blade
120: cutting plate
130: seating surface
140: suction hole
150: pattern hole
160: home
170: carbon fiber
180: cutting bed
190: vacuum box
200: bulkhead
210: nozzle
220: supply roller
230: pinch roller
240: winding roller
250: first inclined unit
260: first slope
270: second inclined unit
280: second slope
290: recovery bin
300: vacuum pump

Claims (9)

In the CFRP cutting device for fixing the carbon fiber and cutting the carbon fiber into a specific pattern,
an ultrasonic knife for cutting the carbon fiber into the specific pattern;
and a seating surface on which the carbon fiber is placed, and a groove of the same pattern as the specific pattern is formed in the seating surface to allow the blade tip of the ultrasonic knife to move through the carbon fiber during the cutting, vacuum a cutting plate in which a plurality of suction holes are formed on the seating surface so that the carbon fiber is in close contact with the seating surface;
a cutting bed installed on the cutting plate and including a vacuum box communicating with the suction hole; and
A vacuum pump connected to the vacuum box and sucking air inside the vacuum box so that the carbon fiber is in close contact with the cutting plate through the suction force generated from the suction hole.
CFRP cutting device comprising a. According to claim 1,
The suction hole is a CFRP cutting device, characterized in that it includes a plurality of pattern holes formed along the groove corresponding to the shape of the specific pattern at the inner edge or the outer edge of the groove in the seating surface. 3. The method of claim 2,
The cutting plate is a CFRP cutting device, characterized in that the suction hole is also formed in the bottom of the groove. According to claim 1,
The vacuum box has a partition wall formed in the inner space acting on the carbon fiber, and a plurality of the inner spaces divided by the partition wall are respectively connected to the vacuum pump. According to claim 1,
The cutting plate is a CFRP cutting device, characterized in that the metal material. According to claim 1,
a supply roller for supplying the carbon fiber and supplying the carbon fiber to the seating surface of the cutting plate;
a pinch roller for moving the carbon fiber supplied from the supply roller to an upper surface of the cutting plate of the cutting bed; and
CFRP cutting device further comprising a winding roller installed on the other side of the cutting bed to recover the cut and remaining carbon fibers. 7. The method of claim 6,
CFRP cutting device, characterized in that the first inclined portion inclined downward in the traveling direction of the carbon fiber from the lower portion of the pinch roller is formed. 7. The method of claim 6,
CFRP cutting device, characterized in that the second inclined portion downwardly inclined downward from one end of the cutting bed to the other side of the cutting bed so that the carbon fiber remaining after cutting is formed. 9. The method of claim 8,
The winding roller is a CFRP cutting device, characterized in that the carbon fiber is formed spaced apart from the second inclined portion at a set interval so that the carbon fiber is caught in a U-shape between the end of the second inclined portion and the winding roller.

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