JP5587945B2 - High strength fiber reinforced plastic sheet cutting machine - Google Patents

Description

  The present invention relates to an apparatus for cutting a high-strength fiber reinforced plastic plate in which a high-strength fiber made of any one of PBO fiber, super-strength polyethylene fiber, and high-strength polyarylate fiber is embedded in a cured plastic into a predetermined shape.

  Carbon fiber reinforced plastic plates with carbon fibers, which are high-strength fibers, embedded in cured plastics are reinforced with extremely tough carbon fibers, so they can be used in applications requiring strength such as aerospace and special vehicles. used. An apparatus for irradiating a laser beam has been developed as a cutting apparatus for the high-strength fiber-reinforced plastic plate. (See Patent Documents 1 and 2)

  The laser beam cutting apparatus described in these publications consumes a great deal of energy for cutting a high-strength fiber-reinforced plastic plate, and cannot efficiently cut in a short time. Also, as a cutting device for high-strength fiber reinforced plastic plates, a device for cutting with a water jet has been developed. However, this cutting device also consumes a large amount of energy and cannot be cut quickly and efficiently. Further, the laser beam or water jet cutting device has a drawback that both the equipment cost and the running cost are considerably increased.

  By the way, an apparatus for cutting a high-strength fiber material used as an aerospace material has been developed (see Patent Document 3). This cutting apparatus cuts a high-strength fiber material using a special cutting cutter. This cutting cutter has a cutting edge joined to the tip of the shank body. The cutting edge portion gradually decreases in thickness toward the tip. Further, the cutting edge portion is formed of a composite obtained by joining a super-hard portion constituting the cutting edge and a cemented carbide portion connecting the cutting blade and the shank body and integrally sintering the cutting edge portion. The tip of is formed with an ultra-high hardness part. A composite composed of a super-hard part and a super-hard alloy part is a mixture of high-hardness particles such as diamond and particles such as TiN and TiC used as a binding material, and these are press-molded at ultra-high pressure. A pellet-shaped super-hard part formed by sintering at a high temperature and a pellet-type cemented carbide part formed of tungsten carbide or the like were integrally sintered and processed into a predetermined shape. Is.

JP 2010-247206 A JP 2011-56583 A JP-A-4-69187

  Since the apparatus described in Patent Document 3 cuts a high-strength fiber material with a special cutting cutter, it can cut more efficiently than a laser beam or a water jet. However, since this cutting device advances the cutting cutter while reciprocating to cut the high-strength fiber material, the high-strength fiber reinforced plastic plate cannot be cut into a predetermined shape by one reciprocation. For this reason, a high-strength fiber reinforced plastic plate cannot be punched into a specific shape efficiently. In particular, the cutting cutter is made into a complex body in which the ultra-high hardness part of the cutting edge is joined to the shank body with a cemented carbide part and integrally sintered, so the cutting cutter is processed into a complex curved shape. In addition, there is a disadvantage that the cutting cutter is extremely expensive.

  The present invention has been developed for the purpose of solving the above-mentioned drawbacks. An important object of the present invention is to cut a high-strength fiber reinforced plastic plate into a predetermined shape with a single reciprocating motion while using an extremely inexpensive cutting blade, so that it can be cut into an extremely accurate and accurate shape. Furthermore, it is an object of the present invention to provide a cutting device for a high-strength fiber reinforced plastic plate that can be manufactured at a low cost while significantly reducing the cost of a cutting blade.

Means for Solving the Problems and Effects of the Invention

The high-strength fiber reinforced plastic sheet cutting apparatus according to the present invention is a high-strength fiber-reinforced plastic sheet obtained by embedding a high-strength fiber composed of any one of PBO fiber, super-strength polyethylene fiber, and high-strength polyarylate fiber in a cured plastic. A cradle 1 having a cut surface 2 for cutting 10 on its upper surface and a high-strength fiber reinforced plastic plate 10 that is moved toward the cut surface 2 of the cradle 1 and is disposed on the cut surface 2 is cut. A cutting die 3 having a cutting edge 4 that is punched in a non-linear shape with a predetermined length along a cutting edge 11A of the object 11 and a blade driving mechanism 5 that reciprocates the cutting die 3 are provided. The punching die 3 is a plate-like carbon steel having a carbon content of 0.45% to 1.4%. The plate-like carbon steel is bent or bent into a predetermined shape to cover the cutting edge 4. As the shape of the closed loop along the cutting edge 11A of the cut object 11, the high-strength fiber reinforced plastic plate 10 is punched with the closed-loop shaped blade edge 4 to separate the object 11 to be cut, and the die 3 is , quenched to a state of lower than 72 a at HRC hardness 62 or more cutting edges 4 and the blade surface inclination angle of the cross-sectional shape perpendicular to the longitudinal direction of the cutting edge 4 (alpha) greater than 30 degrees The cross-sectional shape is smaller than 60 degrees and increases the blade surface inclination angle (α) toward the blade edge 4. The double-sided cutting device reciprocates the cutting die 3 with a blade drive mechanism 5 and sandwiches the high-strength fiber reinforced plastic plate 10 disposed on the cutting surface 2 of the cradle 1 between the cradle 1 and the punching die 3. Cut along the cutting edge 11 </ b> A of the cut object 11.
However, in this specification, “blade surface inclination angle (α)” means an angle formed by both opposing surfaces of the blade edge portion.

The above cutting device for high-strength fiber reinforced plastic plates uses a very inexpensive cutting blade to punch out high-strength fiber reinforced plastic plates into a predetermined shape with a single reciprocating motion, thereby providing an extremely efficient and accurate outer shape. Further, there is a feature that it can be cut at a low cost while significantly reducing the cost of the cutting blade. This is because the above-described cutting apparatus cuts a high-strength fiber-reinforced plastic plate with a die having a unique structure. The above punching die uses a plate-like carbon steel with a carbon content of 0.45% to 1.4%, and is bent or curved into a shape along the cutting edge of the workpiece having various outer shapes. At the same time, the cutting edge angle of the cross-sectional shape orthogonal to the longitudinal direction of the cutting edge 4 is processed so that the cutting edge angle is larger than 30 degrees and smaller than 60 degrees, and the HRC hardness of the cutting edge 4 is quenched to 62 or more. Therefore, it can be processed into a shape along the cutting edge of various objects to be cut using an extremely inexpensive material.

  The above-mentioned unique punching die can be obtained by punching 200-300 PBO fiber reinforced plastic plates, ultra-strong polyethylene fiber reinforced plastic plates, and high-strength polyarylate fiber reinforced plastic plates with a thickness of 2 mm. There is no damage, and the punching process is possible.

In the cutting device for a high-strength fiber-reinforced plastic plate according to the present invention, the die 3 can make the HRC hardness of the cutting edge 4 64 or more.
In the above cutting apparatus, since the HRC hardness of the cutting edge of the punching die is 64 or more, the cutting edge has a higher hardness and can have a long life.

  In the cutting device for a high-strength fiber-reinforced plastic plate of the present invention, the cutting edge portion of the punching die 3 can be shaped to gradually increase the blade surface inclination angle (α) toward the cutting edge 4. In this punching die 3, the blade surface inclination angle (α) of the blade edge 4 becomes small and the cut is good, and the blade surface inclination angle (α) gradually increases as the blade edge 4 is inserted into the high-strength fiber reinforced plastic plate 10. It becomes small and is smoothly inserted into the crack 14. For this reason, the characteristic which can cut the high intensity | strength fiber reinforced plastic board 10 more effectively is implement | achieved.

  The cutting device for a high-strength fiber-reinforced plastic plate of the present invention can make the blade surface inclination angle (α) of the punching die 3 larger than 30 degrees, and the HRC hardness of the cutting edge 4 can be 64 or more.

Furthermore, in the cutting device for a high-strength fiber-reinforced plastic plate of the present invention, the die 3 can be a single blade.
Since the above cutting apparatus has one blade surface as a vertical surface and the other as an inclined surface, the cutting edge on the vertical surface side can be punched cleanly and cut.

The cutting device for a high-strength fiber-reinforced plastic plate according to the present invention is formed by forming a cutting edge 3 of a punching die 3 and a cutting surface 2 of a cradle 1 into a three-dimensional curved surface as a shape along a three-dimensional curved surface. The strength fiber reinforced plastic plate 10 can be cut.
In the above cutting apparatus, since the cutting edge of the punching die and the cut surface of the cradle have a three-dimensional curved surface, a high-strength fiber reinforced plastic plate molded into a three-dimensional curved surface is to be cut as a three-dimensional curved surface. It can be punched and processed cleanly and efficiently.

In the cutting apparatus for a high-strength fiber reinforced plastic plate according to the present invention, the high-strength fibers embedded in the high-strength fiber-reinforced plastic plate 10 can be PBO fibers.
The above-described cutting apparatus can efficiently punch a PBO fiber reinforced plastic plate having high-strength fibers as PBO fibers and cut into a workpiece having a predetermined shape.

In the cutting apparatus for a high-strength fiber reinforced plastic plate of the present invention, the high-strength fiber embedded in the high-strength fiber-reinforced plastic plate 10 can be an ultra-strong polyethylene fiber.
The above-described cutting apparatus can efficiently cut a super-strength polyethylene fiber reinforced plastic plate having high-strength fibers as super-strength polyethylene fibers to cut into a workpiece having a predetermined shape.

The cutting apparatus for a high-strength fiber reinforced plastic plate according to the present invention can make a high-strength fiber embedded in the high-strength fiber-reinforced plastic plate 10 into a high-strength polyarylate fiber.
The above cutting apparatus can efficiently cut a high-strength polyarylate fiber reinforced plastic plate using high-strength fibers as high-strength polyarylate fibers to cut into a workpiece having a predetermined shape.

The cutting device for a high-strength fiber reinforced plastic plate of the present invention can use the plastic of the high-strength fiber reinforced plastic plate 10 as an epoxy resin.
The above cutting apparatus can efficiently punch a high-strength fiber reinforced plastic plate made of a cured epoxy resin into a plastic in which high-strength fibers are embedded, and cut it into a workpiece having a predetermined shape.

  In the cutting apparatus for a high-strength fiber-reinforced plastic plate of the present invention, the thickness of the punching die 3 can be a plate-like carbon steel that is thicker than 1 mm and thinner than 10 mm.

1 is a schematic perspective view of a cutting device for a high-strength fiber-reinforced plastic plate according to an embodiment of the present invention. It is a vertical sectional view showing an example of a punching die. It is a vertical sectional view showing another example of the punching die. It is a vertical sectional view showing another example of the punching die. It is a vertical sectional view showing another example of the punching die. It is an expanded sectional view which shows another example of a cutting die. It is an expanded sectional view which shows another example of a cutting die. It is an expanded sectional view showing the state where the cutting die of the cutting device concerning the example of the present invention cuts the high strength fiber reinforced plastic board. It is a cross-sectional view showing an example of a conventional punching die.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment shown below exemplifies a cutting device for a high-strength fiber-reinforced plastic plate for embodying the technical idea of the present invention, and the present invention does not specify the cutting device as follows. Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The cutting device of the present invention cuts a high-strength fiber reinforced plastic plate formed by embedding a high-strength fiber made of any one of PBO fiber, super-strength polyethylene fiber, and high-strength polyarylate fiber in a cured plastic. The cutting apparatus of the present invention cuts and cuts any of a PBO fiber reinforced plastic plate, an ultra-strong polyethylene fiber reinforced plastic plate, and a high-strength polyarylate fiber reinforced plastic plate with a punching die. The cutting apparatus of the present invention is a high-strength fiber reinforced plastic in which any one or a plurality of PBO fibers, super-strength polyethylene fibers, and high-strength polyarylate fibers are embedded in a cured plastic such as an epoxy resin or a phenol resin. Cut the board. The cutting apparatus of the present invention is not an apparatus that cuts a prepreg of a high-strength fiber reinforced plastic plate that is in an uncured state of the plastic and becomes a high-strength fiber reinforced plastic plate by curing the plastic, but a plurality of prepregs are laminated. This is a device for cutting a high-strength fiber-reinforced plastic plate made by curing plastic.

  The cutting apparatus of FIG. 1 moves toward the cutting surface 2 of the receiving table 1 having a cutting surface 2 on the upper surface on which the high-strength fiber reinforced plastic plate 10 is placed and cut with the punching die 3. A punching die 3 having a cutting edge 4 for punching a high-strength fiber-reinforced plastic plate 10 arranged in the cut section 2 in a non-linear shape with a predetermined length along the cutting edge 11A of the workpiece 11 and this punching A blade drive mechanism 5 for reciprocating the mold 3 is provided.

  The cradle 1 is a metal plate, and the cut surface 2 is a flat or three-dimensional solid curved surface. The cradle may be a resin or rubber plate. The cut surface 2 has a shape along the cut edge 11A of the cut object 11 obtained by cutting the high-strength fiber-reinforced plastic plate 10, that is, the cut edge 11A. Accordingly, the cradle 1 for punching the cut object 11 having the cut edge 11A to be cut as a flat surface has a cut surface 2 as a flat surface and the cut edge to be cut as a three-dimensional solid curved surface. The cradle for punching is made of a three-dimensional curved surface along the cutting edge of the object to be cut.

  The cradle 1 in FIG. 1 has an elastic sheet 1 </ b> A laminated on a cut surface 2. The elastic sheet 1A is a sheet-like rubber-like elastic body having a thickness of 1 mm to 10 mm. The cradle 1 in which the elastic sheet 1A is laminated on the upper surface is a state in which the cutting edge 3 of the punching die 3 is brought into close contact with the elastic sheet 1A while the high strength fiber reinforced plastic plate 10 is punched by the punching die 3 The cutting edge 11A of the object 11 to be cut out from the high-strength fiber reinforced plastic plate 10 can be surely and neatly cut by inserting the third cutting edge 4 into the elastic sheet 1A. The cradle 1 in which the elastic sheet 1A is laminated on the upper surface can cleanly cut an object to be cut having the cutting edge 11A as a solid curved surface with the cutting edge 11A. However, the object to be cut 11 having the cut edge 11A as a flat surface can also be cut beautifully by laminating the elastic sheet 1A on the cut surface 2 as a flat surface. However, the cradle need not necessarily be provided with an elastic sheet on the upper surface, and a high-strength fiber reinforced plastic plate can be punched and cut by bringing a punching die closer to or in contact with the cut surface of the cradle.

  The punching die 3 is made of a plate-like carbon steel having a carbon content of 0.45% to 1.4%. The punching die is preferably made of sheet carbon steel having a thickness of 2 mm to 5 mm. However, the punching die can be a plate-like carbon steel having a thickness greater than 1 mm and less than 10 mm. If the punching die is too thin, it will be easily damaged by the impact of the punching process, and if it is too thick, it will not be possible to smoothly extract the cut material that is cut and inserted inside the punching die.

  The punching die is processed into a shape along the cutting edge 11A of the workpiece 11 to be cut, which is bent or curved in the previous step of quenching the plate-like carbon steel. The carbon steel optimal for the punching die 3 has a carbon content of 0.5% to 0.7%. However, the carbon content can be used within the above range. The carbon steel of the die 3 can be hardened by increasing the carbon content. However, since it becomes brittle as the carbon content increases, it is set to an optimum value within the aforementioned range in consideration of hardness and brittleness.

  The cutting die 3 in which the cutting edge 4 is processed into a shape along the cutting edge 11A of the object 11 to be cut is formed by punching the high-strength fiber reinforced plastic plate 10 with the closed-loop cutting edge 4 using the cutting edge 4 as a closed loop. 11 is separated. In the plate-like carbon steel obtained by processing the plate-like carbon steel into a closed loop, the cutting edge 4 is polished to provide the cutting edge 4. The punching die 3 is polished so as to incline one side of the plate-like carbon steel to provide the cutting edge 4, and then hardened by hardening. The punching die 3 in FIGS. 2 and 3 polishes plate-like carbon steel so that the tip angle in the cross-sectional shape perpendicular to the longitudinal direction of the blade edge 4, that is, the blade surface inclination angle (α) is about 40 degrees. ing. The plate-like carbon steel can be polished with a file or a grindstone to provide the cutting edge 4.

The cutting ability of the high-strength fiber-reinforced plastic plate is lowered regardless of whether the blade surface inclination angle (α) is large or small. Therefore, the blade surface inclination angle (α) of the punching die 3 is larger than 30 degrees , preferably larger than 30 degrees. Further, the blade surface inclination angle (α) of the punching die is made smaller than 60 degrees.

  The state in which the punching die of the present invention cuts the high-strength fiber-reinforced plastic plate is shown in the sectional view of FIG. As shown in this figure, the punching die 3 presses the cutting edge 4 against the surface of the high-strength fiber reinforced plastic plate 10, and as shown in FIG. A crack 14 is made by slightly cutting the surface. Further, when the cutting edge 4 of the punching die 3 cuts the high-strength fiber reinforced plastic plate 10 deeply, as shown in FIG. 8 (2), the wedge portion 3A located above the cutting edge 4 in the drawing is inserted into the crack 14. Then, the crack 14 is expanded. In a state where the wedge portion 3A expands the crack 14, the high-strength fiber 15 embedded in the cured plastic is easily pulled by the plastic on both sides of the crack 14 and easily cut. In this state, the cutting edge 4 of the punching die 3 is further inserted deeply into the crack 14 to cut the high-strength fibers 15 that are easily cut. The cutting edge 4 of the punching die 3 is further inserted deeply into the crack 14 to completely cut the high-strength fiber-reinforced plastic plate 10.

  8 has a shape in which the blade surface inclination angle (α) gradually increases toward the cutting edge 4. This punching die 3 can prevent the blade edge from being damaged by increasing the blade surface inclination angle (α) of the blade edge 4, and can reduce the blade surface inclination angle (α) of the wedge portion 3A to reduce the blade surface inclination angle (α). The wedge portion 3A is smoothly inserted into the crack 14 formed on the surface of the plate 10, and the high-strength fiber reinforced plastic plate 10 can be cut more efficiently.

  In the cutting device of the present invention, the blade surface inclination angle (α) of the punching die 3 is extremely large as compared with the conventional punching die 3. The cross-sectional view of FIG. 9 shows a cross-sectional view of a conventional punching die 3. As shown in this figure, the conventional cutting die 3 has a shape in which the blade surface inclination angle (α) is considerably small and the cut sheet or the like is reliably cut by the sharp blade edge 4.

  The punching die of the cutting apparatus of the present invention quenches the quenched plate-like carbon steel to a unique hardness, and makes the blade surface inclination angle (α) remarkably larger than that of a conventional punching die. This punching die does not cut the object to be cut only with a sharp blade edge like a conventional punching die. A punching die having a specific hardness and a specific blade surface inclination angle (α) efficiently cuts a high-strength fiber-reinforced plastic plate, which is considered to be too hard to be cut with a blade, so that the blade edge is not damaged. This is because the wedge portion is inserted into the crack of the high-strength fiber reinforced plastic plate, and the high-strength fiber is cut in a state where it is easily cut.

  2 and 3 has a cutting edge 4 as a single blade. In the single-blade punching die 3, since one side of the cutting edge 4 is a vertical surface 4A, the vertical surface 4A can be used as the cutting edge 11A of the workpiece 11, and the cutting edge 11A of the workpiece 11 can be cut in a clean state. When the high-strength fiber reinforced plastic plate 10 is punched with the punching die 3, it is separated into a cut object 11 to be a product and a waste part 13 to be discarded. The punching die 3 in FIG. 2 is punched so as to provide a through hole 12 in the high-strength fiber-reinforced plastic plate 10. This punching die 3 is a single blade with an inclined surface 4B on the inner surface, and the portion to be punched as the through hole 12 is the discarding portion 13 and the outer side of the through hole 12 is the workpiece 11 and the cutting edge 11A of the workpiece 11 is clean Can be cut. This is because the cutting edge 11A is cut by the vertical surface 4A of the punch 3. The punching die 3 in FIG. 3 punches a high-strength fiber-reinforced plastic plate 10 and cuts the workpiece 11 inside the punching die 3. The punching die 3 is a single-edged blade having an inclined surface 4B on the outside. The part to be punched inside the punching die 3 is a workpiece 11 and the part separated to the outside of the punching die 3 is a waste part 13 to be cut. 11. The cutting edge 11A on the outer periphery can be cut cleanly.

  Further, as shown in FIG. 4, the cutting die 3 can have a cutting edge 4 as a double-edged blade having inclined surfaces 4B on both sides.

  2 and 3 cuts the high-strength fiber-reinforced plastic plate 10 into a flat shape. As shown in FIG. 5, the cutting die 3 has a structure in which a high-strength fiber reinforced plastic plate 10 molded into a three-dimensional curved surface has a three-dimensional structure with the cutting edge 4 along the three-dimensional curved surface. 11A can be punched into a solid curved surface and cut. In this punching die 3, the cutting edge 4 is a three-dimensional curved surface, and the cut surface 2 of the cradle 1 is also a three-dimensional curved surface along the cutting edge 4 of the punching die 3.

  Furthermore, as shown in the enlarged sectional view of FIG. 6, the punching die 3 gradually increases the blade surface inclination angle (α) toward the cutting edge 4. The reason why the blade surface inclination angle (α) is increased toward the cutting edge 4 is to prevent the cutting edge 4 from being damaged while efficiently cutting the hard and tough high-strength fiber reinforced plastic plate 10 with the cutting edge 4. . In this punching die 3, the cutting edge 4 having a large blade surface inclination angle (α) is first brought into contact with the surface of the high-strength fiber reinforced plastic plate 10 to start cutting, and after the cutting is started, the blade surface inclination angle is set. Cutting is performed so that the object to be cut 11 and the discarding unit 13 are separated from each other at a portion where (α) becomes gradually smaller. The cutting die 3 shown in the enlarged cross-sectional view of FIG. 6 is polished so that the inclined surface 4B of the single blade is curved, and the blade surface inclination angle (α) is gradually increased toward the blade edge 4. As shown in the enlarged sectional view of FIG. 7, the punching die 3 can be polished so that the blade surface inclination angle (α) gradually increases toward the cutting edge 4.

  The plate-like carbon steel is hardened so that the HRC hardness of the cutting edge 4 is 62 or more, preferably about 65 in a state where the tip edge is polished and the cutting edge 4 is provided. The hardness of the cutting edge 4 can be increased to increase the life, but if it is too hard, it becomes brittle and easily damaged during punching. Accordingly, the die 3 is quenched so that the HRC hardness of the cutting edge 4 is higher than 62, preferably higher than 64, and lower than 72, preferably lower than 66. The hardness of the cutting edge 4 after quenching is controlled by the carbon content and the quenching temperature. The hardness of the cutting edge 4 can be increased by increasing the quenching temperature, and the hardness can be decreased by decreasing the temperature. For example, the carbon steel has a carbon content of 0.6%, a quenching temperature of 780 ° C. to 950 ° C., and an HRC hardness in the range of 62 to 72 described above. The punching die 3 having an HRC hardness of 65 after quenching can have this hardness with a carbon content of 0.6% and a quenching temperature of 850 ° C.

  The blade drive mechanism 5 reciprocates the punching die 3 up and down, and punches and cuts the high-strength fiber reinforced plastic plate 10 placed on the cutting surface 2 of the cradle 1 with the punching die 3. The blade drive mechanism 5 includes an upper and lower base 6 that fixes the punch 3 and a cylinder 7 that reciprocates the upper and lower base 6 up and down. The punching die 3 is fixed to the lower surface of the upper and lower table 6, and the upper and lower table 6 is reciprocated up and down by a cylinder 7 to punch out the high-strength fiber reinforced plastic plate 10 placed on the receiving table 1. That is, the die 3 is reciprocated by the blade driving mechanism 5 and is sandwiched between the cradle 1 and the die 3 by the high strength fiber reinforced plastic plate 10 disposed on the cutting surface 2 of the cradle 1 to be cut. 11 is cut along a cutting edge 11A.

  The high-strength fiber reinforced plastic plate punched and cut by the above cutting device can be applied with plastic along the cutting edge to prevent the cutting edge from cracking. The plastic applied to the cutting edge is an uncured liquid or paste plastic adhesive such as a cyanoacrylate adhesive, an epoxy resin adhesive, or a urethane resin adhesive. Etc. can be used. Moreover, it can also apply | coat in the state which heat-melts a thermoplastic resin. The plastic applied to the cutting edge penetrates into the crack of the cutting edge and prevents cracking due to the impact of the cutting edge. The plastic can also be applied after polishing the cut edge of the high strength fiber reinforced plastic plate. The plastic applied in this state also penetrates into the cracks and prevents the cutting edge from cracking.

DESCRIPTION OF SYMBOLS 1 ... Receptacle 1A ... Elastic sheet 2 ... Cut surface 3 ... Cutting die 3A ... Wedge part 4 ... Cutting edge 4A ... Vertical surface
4B ... Inclined surface 5 ... Blade driving mechanism 6 ... Upper / lower platform 7 ... Cylinder 10 ... High-strength fiber reinforced plastic plate 11 ... Cut object 11A ... Cutting edge 12 ... Through hole 13 ... Waste part 14 ... Crack 15 ... High strength fiber

Claims (10)

A cut surface (2) is cut by placing a high-strength fiber reinforced plastic plate (10) in which high-strength fibers made of PBO fiber, super-strength polyethylene fiber, or high-strength polyarylate fiber are embedded in the cured plastic. A cradle (1) having an upper surface, and a high strength fiber reinforced plastic plate (10) arranged on the cut surface (2) by moving toward the cut surface (2) of the cradle (1), A cutting die (3) having a cutting edge (4) punched in a non-linear shape of a predetermined length along the cutting edge (11A) of the object to be cut (11), and a cutter for reciprocating the cutting die (3) A drive mechanism (5),
The punching die (3) is a plate-like carbon steel having a carbon content of 0.45% to 1.4%,
The punching die (3) is a plate-shaped carbon steel that is bent or curved into a predetermined shape, and the cutting edge (4) has a closed loop shape along the cutting edge (11A) of the workpiece (11), With a closed-loop shaped cutting edge (4), a high-strength fiber reinforced plastic plate (10) is punched to separate the workpiece (11),
Further, the cutting edge (4) is quenched to a state where the HRC hardness is 62 or more and lower than 72 , and
The blade surface inclination angle (α) of the cross-sectional shape perpendicular to the longitudinal direction of the blade edge (4) is larger than 30 degrees and smaller than 60 degrees, and the blade surface inclination angle (α) is increased toward the blade edge (4). It has a cross-sectional shape that
The punching die (3) is reciprocated by the blade drive mechanism (5), and the high strength fiber reinforced plastic plate (10) disposed on the cut surface (2) of the cradle (1) is the cradle (1). And a cutting device for a high-strength fiber-reinforced plastic plate that is punched and cut along the cutting edge (11A) of the object to be cut (11) by being sandwiched by the punching die (3).   The cutting device for a high-strength fiber-reinforced plastic plate according to claim 1, wherein the punching die (3) gradually increases the blade surface inclination angle (α) toward the cutting edge (4). The cutting device for a high-strength fiber reinforced plastic plate according to any one of claims 1 to 2 , wherein the punching die (3) has an HRC hardness of the cutting edge (4) of 64 or more. The cutting device for a high-strength fiber-reinforced plastic plate according to any one of claims 1 to 3 , wherein the punching die (3) is a single blade. The cutting edge (4) of the punching die (3) and the cut surface (2) of the cradle (1) have a shape along a three-dimensional curved surface located in three dimensions, and are reinforced with high strength fibers formed into a three-dimensional curved surface. The cutting device for a high-strength fiber-reinforced plastic plate according to any one of claims 1 to 4 , wherein the plastic plate (10) is cut. The high strength fiber reinforced plastic plate cutting device according to any one of claims 1 to 5 , wherein the high strength fibers embedded in the high strength fiber reinforced plastic plate (10) are PBO fibers. The high strength fiber reinforced plastic plate cutting apparatus according to any one of claims 1 to 5 , wherein the high strength fiber embedded in the high strength fiber reinforced plastic plate (10) is a super strong polyethylene fiber. The high strength fiber reinforced plastic plate cutting apparatus according to any one of claims 1 to 5 , wherein the high strength fiber embedded in the high strength fiber reinforced plastic plate (10) is a high strength polyarylate fiber. The cutting device for a high-strength fiber reinforced plastic plate according to any one of claims 1 to 8 , wherein the plastic of the high-strength fiber reinforced plastic plate (10) is an epoxy resin. The cutting device for a high-strength fiber-reinforced plastic plate according to any one of claims 1 to 9 , wherein the punching die (3) is thicker than 1 mm and thinner than 10 mm.

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