JP2002321242A - Apparatus for manufacturing perforated sheet material for sound absorbing panel of airplane engine nacelle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for manufacturing a perforated sheet material for the sound absorbing panel of an airplane engine nacelle, preventing a resin in a prepreg from flowing in perforations in a curing process and capable of holding the whole of an uncured fiber reinforced resin prepreg perforated surface sheet to a flexible state having tackiness to facilitate the shaping and application to a curved surface mold in a post process. SOLUTION: The apparatus for manufacturing the perforated sheet material for the sound absorbing panel of the airplane engine nacelle consists of a feed means 5 for bonding a plurality of uncured fiber reinforced resin prepreg perforated surface sheets 4 under pressure to feed them, a perforation means 22, which is held between an upper press plate 19 and a lower blade receiving press plate 21 to be fixed and forms a large number of perforations by a perforation edge instrument 23 and applies heat only to the peripheries of the perforations from the perforation edge instrument 23 to semicure the resin in a prepreg, and a cutting means 36 for cutting the perforated uncured fiber reinforced resin prepreg perforated surface sheets into a definite dimension and applying heat only to the cut parts from a cutter 37 to semicure the resin in the prepreg.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a perforated plate material for an aircraft engine nacelle sound absorbing panel.

[0002]

2. Description of the Related Art In order to prevent noise generated by an engine, an aircraft uses a honeycomb sandwich structure having a sound absorbing performance called a sound absorbing panel in a portion called an engine nacelle which covers the engine. As the face plate of this honeycomb sandwich structure, a perforated plate having a large number of holes is used, and this perforated plate has conventionally been made of an aluminum alloy. This perforated plate made of aluminum alloy is manufactured by punching, drilling, or the like, followed by press forming, stretch forming, burson forming, or the like into an engine nacelle shape.

[0003] By the way, when the airfield has been in the seafront area or in the case of an aircraft that frequently flies over the sea, the engine is often subjected to wind containing a large amount of salt, and the metal engine nacelle is susceptible to corrosion due to salt damage. It has been regarded as a problem.
Therefore, in recent years, a composite engine nacelle has been developed instead of metal (aluminum alloy) for the purpose of weight reduction and improvement of corrosion resistance. However, the process of manufacturing a composite perforated plate is difficult, and so far, a method of forming a composite material into a nacelle shape and hardening it and then drilling (still mainstream in the world), plastics with a large number of drilling pins A method has been employed in which a pin plate made of a porous material is pierced into a composite material before curing and then heated and cured to form a perforated plate. Recently, uncured composite material (prepreg) is preheated until the resin flow becomes poor, and then punched in a flat plate state by punching, and then formed into a curved mold. A method of heat curing is also introduced. (JP-A-10-128778)

[0004] However, the method of drilling a hole after forming and hardening the composite material into a nacelle shape requires time and expense, and it is difficult to process the formed product if it is a three-dimensional contour product. An NC control drill machine is required, and the introduction and maintenance of the machine become difficult. In addition, a method in which a plastic pin plate is pierced into a composite material before curing and then heat-cured to form a perforated plate requires that the pin plate be manufactured in accordance with a three-dimensional contour, and the plate is manufactured in a long time. And costly. Furthermore, a method of punching holes in a flat plate state after punching the prepreg after preheating, and then shaping and heating and curing the prepreg on a curved surface molding die, is that the entire prepreg is hard and has no adhesive force, and it is necessary to shape and paste on the curved surface molding die It will be difficult.

[Problems to be solved by the invention]

[0005] In order to eliminate the above-mentioned problems of the prior art, the present invention can perform a large number of holes in an uncured fiber reinforced resin prepreg face plate accurately, quickly and easily. In addition, heat is applied only around the hole when drilling, so that the resin in the prepreg does not flow into the hole during the curing process in the autoclave later, and the entire uncured fiber reinforced resin prepreg porous face plate is softly adhered. An object of the present invention is to provide an apparatus for manufacturing a perforated plate material for an aircraft engine nacelle sound-absorbing panel, which can be maintained in a state having force and facilitates shaping and pasting to a curved surface forming die in a subsequent process. .

[0006]

An apparatus for manufacturing a perforated panel material for an aircraft engine nacelle sound-absorbing panel according to the present invention for solving the above-mentioned problems is provided by feeding a plurality of uncured fiber reinforced resin prepreg face plates by pressing. When the uncured fiber reinforced resin prepreg face plate fed by the feeding means and the feeding means is stopped, it is fixed by being sandwiched between the upper holding plate having a large number of holes and the lower receiving / cumming holding plate. During the prepreg, a large number of holes are drilled with a drilling tool with respect to the uncured fiber reinforced resin prepreg face plate fixed by the fixing means, and heat is applied only around the holes from the drilling tool. Drilling means for semi-curing the resin, and cutting the uncured fiber reinforced resin prepreg porous face plate sent after being drilled by the drilling means with a cutting blade for each fixed size and simultaneously from the cutting blade to the cutting portion. Only heat It is given to those comprising more with cutting means for semi-curing the resin in the prepreg.

In the above-described apparatus for manufacturing a perforated panel material for an aircraft engine nacelle sound-absorbing panel according to the present invention, the perforating blade of the perforating means for the uncured fiber reinforced resin prepreg face plate is subjected to ultrasonic vibration by an ultrasonic oscillator. It is preferable to apply frictional heat by ultrasonic vibration only around the hole at the time of drilling, or to apply heat only around the hole at the time of drilling by being heated by a heater.

Also, the cutting blade of the cutting means for cutting the uncured fiber reinforced resin prepreg porous face plate into fixed dimensions is subjected to ultrasonic vibration by an ultrasonic oscillator, and the frictional heat due to the ultrasonic vibration is applied only to the cutting portion at the time of cutting. It is preferable to apply the heat to the sheet or to apply heat only to the cut portion at the time of cutting by heating with a heater.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of a manufacturing apparatus for a perforated plate material for an aircraft engine nacelle sound absorbing panel according to the present invention will be described with reference to the drawings. In FIGS. 1, a roll stand 2 is installed at one end, and a plurality of roll stands
In this example, three uncured fiber reinforced resin prepreg face plate rolls 3 are supported on the upper, middle, and lower tiers. A feeding means 5 for an uncured fiber reinforced resin prepreg face plate 4 fed from the roll 3 is provided at the end of the roll stand 2. That is, the feeding means 5 includes a guide roller 6 for guiding the uncured fiber reinforced resin prepreg face plate 4 fed from the upper roll 3 and a guide roller for guiding the uncured fiber reinforced resin prepreg face plate 4 fed from the middle roll 3. 7, and a guide roller 8 for superimposing and guiding three uncured fiber reinforced resin prepreg face plates 4 passed through the guide rollers 6 and 7 and an uncured fiber reinforced resin prepreg face plate 4 fed from the lower roll 3. A face plate feeding mechanism 9 for feeding the piled uncured fiber reinforced resin prepreg face plate 4 on the base 1; and a pressure roller 10 for crimping the three uncured fiber reinforced resin prepreg face plates 4 stacked at the beginning of feeding.
It consists of: The face plate feeding mechanism 9 in the feeding means 5 having such a configuration includes a rail 12 with guide grooves 11 fixed to both ends of the base 1 from the vicinity of the pressure roller 10 to the vicinity of a cutting means described later, and the guide of the rail 12. It comprises a face plate suction tool 13 that runs along the groove 11. The pressure roller 10 in the feeding means 5 is of a heating type,
The uncured fiber reinforced resin prepreg face plate 4 is heated by a press machine 15 supported by the support frame 14 to reduce the resin viscosity in the prepreg and press-fit, thereby expelling air between the prepregs and bringing them into close contact.

In front of the pressure roller 10, when the uncured fiber reinforced resin prepreg face plate 4 fed by the face plate feed mechanism 9 of the feeding means 5 is intermittently stopped, the face plate 4 is fixed. Means 16 are provided. This fixing means 16 has a large number of holes 17 and an actuator 18.
The upper presser plate 19 can be moved up and down, and the lower receiving / pressing plate 21 fixedly mounted on the base 1 having a plurality of holes 20 at the same position. The face plate 4 is fixed between the plates 19 and 21.

At the same position as the fixing means 16, the uncured fiber reinforced resin prepreg face plate 4 fixed by the fixing means 16 is formed with a large number of holes, and at the same time, heat is applied only around the holes to prepare the prepreg. Drilling means 22 for semi-curing the resin therein is provided. The perforating means 22 is provided with six perforating blades 23, which mate with the perforations 17 and 20 of the upper and lower holding plates 19 and 21, are divided into two parts in the front and rear directions and three parts in the left and right parts respectively. The drilling jigs 24 are each moved up and down by a press machine 25. In the case of this example, the ultrasonic vibration is applied to the drilling tool 23 of the drilling means 22 by the ultrasonic oscillator 26 so that frictional heat due to the ultrasonic vibration is applied only around the hole at the time of drilling. . Then, the press machine 25 in the drilling means 22
And the actuator 18 for vertically moving the upper holding plate 19 of the fixing means 16,
It is fixed on top.

Below the perforating means 22, that is, below the case table 1, there is provided a prepreg collecting means 28 for collecting the prepreg punched by the perforation by vacuum suction. The prepreg collecting means 28 is provided on the base table 1.
A prepreg collecting chute 29 provided below the upper receiving blade / holding plate 21, a collecting box 30 connected thereto, a vacuum chamber 32 connected to the prepreg collecting chute 29 via a vacuum suction pipe 31, 32 and a vacuum pump 33 connected via a vacuum suction pipe 31 '.

An uncured fiber reinforced resin prepreg perforated face plate 34 which is fed after being perforated by the perforating means 22 is guided by guide rollers 35 to the other end on the base table 1, and is guided at predetermined intervals. Cutting means 36 for cutting is provided. The cutting means 36 lowers the cutting blade 37 by an actuator 38. In this embodiment, the cutting blade 37 is subjected to ultrasonic vibration by an ultrasonic oscillator 39, and is applied only to the cutting portion at the time of cutting. The ultrasonic oscillator 39 traverses the groove rail 41 on the gantry 40 straddling the base table 1 and traverses the lowered cutting blade 37 to cut the uncured fiber reinforced resin prepreg porous. The face plate 34 is cut.

In front of the cutting means 36, a perforated board material for an aircraft engine nacelle sound-absorbing panel which is connected to the base 1 and is made of an uncured fiber reinforced resin prepreg perforated face plate 34 'of a predetermined size cut by the cutting means 36 is provided. Receiving means 42 is provided. This receiving means 42
A curved receiving plate 43 concaved downward, and a plurality of uncured fiber reinforced resin prepreg porous face plates 3 received on the receiving plate 43;
A cover plate 44 having a curved surface concaved downward to hold 4 '.

The operation of the apparatus for manufacturing a porous material for an aircraft engine nacelle sound absorbing panel according to the embodiment configured as described above will be described. First, the upper row of the roll stand 2,
The uncured fiber reinforced resin prepreg face plate 4 is unreeled from the three rolls supported on the middle and lower stages, and the uncured fiber reinforced resin prepreg face plate 4 unreeled from the upper and middle rolls.
After passing through the guide rollers 6 and 7, the uncured fiber reinforced resin prepreg fed out from the lower roll 3 is piled on the prepreg face plate 4 and guided by the guide roller 8, and the three piled uncured fiber reinforced resins are piled up. The prepreg face plate 4 is heated and pressed by a heating-type pressure roller 10, and then is suctioned by the face plate suction device 13 of the face plate feeding mechanism 9 in the feeding means 5.
Is self-propelled along the guide groove 11 of the rail 12, and the uncured fiber reinforced resin prepreg face plate 4 is fed forward.

When the uncured fiber reinforced resin prepreg face plate 4 sent by the face plate feed mechanism 9 reaches the first half position of the perforating means 22, it is automatically stopped, and the uncured fiber reinforced resin prepreg at the position of the perforating means 22 is automatically stopped. The resin prepreg face plate 4 is fixed by fixing means 16. That is, the upper holding plate 19 is lowered by the actuator 18 and is fixed between the lower receiving blade and holding plate 21 on the base 1.

A large number of holes H are formed in the fixed uncured fiber reinforced resin prepreg face plate 4 by the hole forming means 22 and heat is applied only around the holes to semi-harden the resin in the prepreg. . That is, ultrasonic vibration is applied to a large number of drilling tools 23 by an ultrasonic oscillator 26 integrated with the six drilling jigs 24, and the six drilling jigs 24 are respectively lowered by the press machine 25, As shown in FIG. 3A, ultrasonic frictional heat is generated at the cutting edge of the drilling tool 23 in contact with the uncured fiber reinforced resin prepreg face plate 4, and the shearing action between the cutting edge and the receiving blade and holding plate 21 in this state occurs. As shown in FIG. 3B, a hole H is formed in the uncured fiber reinforced resin prepreg face plate 4 and simultaneously the periphery of the hole is instantaneously heated by the ultrasonic frictional heat of the drilling blade 23, and the resin in the prepreg around the hole is formed. Is semi-cured. Therefore, the resin in the prepreg does not flow into the opened hole H in the subsequent curing step in the autoclave.

The prepreg P, which has been removed by punching as shown in FIG. 3C, sucks air in the prepreg collecting chute 29 into the vacuum chamber 32 by driving the vacuum pump 33 shown in FIGS. By
It is dropped on the prepreg collection chute 29 and stored in the collection box 30.

By the operation of the perforating means 22, three holes H are perforated at the tip of the uncured fiber reinforced resin prepreg face plate 4 as shown in FIG. Then, each of the six drilling jigs 24 of the drilling means 22 is pressed by the pressing machine 2.
5, the drilling blade 23 is pulled out from the hole 17 of the upper holding plate 19, and the upper holding plate 19 is raised by the actuator 18 to release the uncured fiber reinforced resin prepreg face plate 4, and then the face plate is fed. The mechanism 9 feeds to the second half position of the drilling means 22 and stops automatically. Thereafter, the uncured fiber reinforced resin prepreg face plate 4 is fixed by the fixing means 16 and perforated by the perforating means 22 in the same manner as described above. As shown in FIG. 4, a hole H is formed for the remaining three blocks, and a hole H similar to that shown in FIG.
Is drilled for three blocks. Thus, the uncured fiber reinforced resin prepreg face plate 4 becomes the porous face plate 34 by intermittent feeding, fixing at the time of stoppage, and drilling.

When the uncured fiber reinforced resin prepreg porous face plate 34 is fed by the face plate feed mechanism 9 in the feeding means 5 and further fed by a predetermined size via the guide roller 35 near the other end of the base 1, It is cut by cutting means 36 at the other end of the base 1. That is, the cutting blade 37 of the cutting means 36 is lowered by the actuator 38 and comes into contact with the uncured fiber reinforced resin prepreg porous face plate 34, and at the same time, ultrasonic vibration is applied to the cutting blade 37 by the ultrasonic oscillator 39. When the ultrasonic oscillator 39 traverses the groove rail 41 on the gantry 40 that straddles the base 1, the cutting blade 37 traverses, and the uncured fiber reinforced resin prepreg porous face plate 34 is pressed and cut to a certain size. At the same time, ultrasonic friction heat is generated at the cutting edge of the cutting blade 37, and only the cut portion is instantaneously heated by the ultrasonic friction heat, so that the resin in the prepreg at the cut portion is semi-cured. Therefore, the cut end of the fiber in the cut portion does not protrude outside, and the cut end becomes clean.

The perforated sheet material for an aircraft engine nacelle sound-absorbing panel comprising the uncured fiber reinforced resin prepreg perforated face plate 34 'cut to a certain size in this way is provided below the receiving means 42 which is sequentially connected to the base table 1. It is received by the concave receiving plate 43 having a concave shape, and the cover plate 4
It is pressed at 4 and held in a curved shape.

In the apparatus for manufacturing a perforated panel material for an aircraft engine nacelle sound-absorbing panel according to the embodiment, the perforating blade 23 of the perforating means 22 for the uncured fiber reinforced resin prepreg face plate 4 is ultrasonically vibrated by an ultrasonic oscillator 26. Is added to apply frictional heat by ultrasonic vibration only around the hole at the time of drilling, but instead of this, a drilling tool that heats with a heater and applies heat only around the hole at the time of drilling There may be. The cutting blade 37 of the cutting means 36, which cuts the uncured fiber reinforced resin prepreg porous face plate 34 into predetermined dimensions, is subjected to ultrasonic vibration by the ultrasonic oscillator 39, so that only the cut portion at the time of cutting is subjected to friction by ultrasonic vibration. Instead of applying heat, a cutting blade that heats with a heater and applies heat only to the cutting portion at the time of cutting may be used.

[0023]

As can be seen from the above description, according to the apparatus for manufacturing a perforated panel material for an aircraft engine nacelle sound-absorbing panel of the present invention, the uncured fiber reinforced resin prepreg face plate is fed, stopped, and many holes are formed. Since a series of processes of sending, cutting and receiving the porous face plate can be performed automatically,
An uncured fiber reinforced resin prepreg perforated face plate to be used as a perforated plate material for an aircraft engine nacelle sound absorbing panel can be accurately, quickly and easily manufactured.

[0024] A large number of holes are formed in the uncured fiber reinforced resin prepreg face plate by a hole cutting tool to which ultrasonic vibration is applied by an ultrasonic oscillator, and frictional heat is applied only around the holes by ultrasonic vibration. Alternatively, since heat is applied only around the hole by making a hole with a hole cutting tool heated by a heater, the resin in the prepreg around the hole is semi-cured. Therefore, since the resin does not flow into the holes in the subsequent curing step in the autoclave, highly accurate holes can be obtained. Since the uncured fiber reinforced resin prepreg porous face plate as a whole maintains its softness and adhesive strength, it can be easily formed and pasted on a curved surface forming die in a later step.

Further, the uncured fiber reinforced resin prepreg perforated face plate is cut by a cutting blade to which ultrasonic vibration is applied by an ultrasonic oscillator to apply frictional heat by ultrasonic vibration only to the cut portion, or to heat the sheet. Since heat is applied only to the cut portion by cutting with the cutting blade tool to which heat has been applied by the container, the resin in the prepreg of the cut portion is semi-cured. Therefore, the cut end of the fiber does not protrude to the outside, and the cut end becomes clean.

[Brief description of the drawings]

FIG. 1 is a perspective view of an apparatus for manufacturing a perforated plate material for an aircraft engine nacelle sound absorbing panel according to the present invention.

FIG. 2 is a side view of FIG.

FIGS. 3a to 3c are partial enlarged views showing a step of punching an uncured fiber-reinforced resin prepreg face plate with a punching blade in the manufacturing apparatus of FIG.

FIGS. 4A and 4B are diagrams showing a step of intermittent feeding of uncured fiber reinforced resin prepreg face plate and a step of making holes for each block.

[Description of Signs] 1 Base stand 2 Roll stand 3 Uncured fiber reinforced resin prepreg face plate roll 4 Uncured fiber reinforced resin prepreg face plate 5 Feeding means 6, 7, 8 Guide roller 9 Face plate feed mechanism 10 Pressure roller 11 Guide groove 12 Rail 13 Face plate suction tool 14 Support frame 15 Press machine 16 Fixing means 17 Many holes of upper holding plate 18 Actuator 19 Upper holding plate 20 Many holes of lower receiving blade and holding plate 21 Lower receiving blade Pressing plate 22 Drilling means 23 Drilling blade tool 24 Drilling jig 25 Press machine 26 Ultrasonic oscillator 27 Mount 28 Prepreg collecting means 29 Prepreg collecting chute 30 Collection box 31, 31 'Vacuum suction tube 32 Vacuum chamber 33 Vacuum pump 34, 34 'Uncured fiber reinforced resin prepreg perforated face plate 35 Guide roller 3 6 Cutting Means 37 Cutting Blade Tool 38 Actuator 39 Ultrasonic Oscillator 40 Mount 41 Groove Rail 42 Receiving Means 43 Receiving Plate 44 Cover Plate H Hole Drilled in Uncured Fiber Reinforced Resin Prepreg Faceplate P Prepreg Pulled Out by Drilling

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29L 31:30 B29L 31:30 (72) Inventor Mitsuhisa Kurosawa 1 Kawasaki-cho, Kakamigahara-shi, Gifu Kawasaki Heavy Industries, Ltd. F-term in Gifu factory (reference) 4F204 AA36 AB25 AG03 AH31 EA01 EB01 EB11 EB22 EE06 EF23 EK03 EK04 EK10 EK13 EK17 EW06 EW23 EW24 FA11 FA18 FA20 FB02 FB22 FE06 FG02 FG09 FH18 FW03

Claims (3)

[Claims] 1. A feeding means for pressing and feeding a plurality of uncured fiber reinforced resin prepreg face plates and a large number of uncured fiber reinforced resin prepreg face plates fed by the feeding means when the feeding means is stopped. Fixing means for sandwiching and fixing between the upper holding plate having the holes and the lower receiving and holding plate, and a number of holes are formed in the uncured fiber reinforced resin prepreg face plate fixed by the fixing means. Drilling means for semi-curing the resin in the prepreg by applying heat only around the hole from the drilling tool at the same time as drilling with the cutting tool, and uncured fiber reinforcement sent after drilling by the drilling means A perforated sheet material for an aircraft engine nacelle sound absorbing panel, comprising cutting means for cutting a resin prepreg perforated face plate with a cutting blade at predetermined dimensions and simultaneously applying heat only to the cutting portion from the cutting blade to semi-harden the resin in the prepreg. Manufacturing of apparatus. 2. The apparatus for manufacturing a perforated sheet material for an aircraft engine nacelle sound absorbing panel according to claim 1, wherein the perforating blade of the perforating means for the uncured fiber reinforced resin prepreg face plate is subjected to ultrasonic vibration by an ultrasonic oscillator. An aircraft characterized in that it applies frictional heat by ultrasonic vibration only around the hole at the time of drilling, or heat is applied by a heater to apply heat only around the hole at the time of drilling. Equipment for manufacturing perforated plate materials for engine nacelle sound absorbing panels. 3. The apparatus for manufacturing a perforated panel material for an aircraft engine nacelle sound absorbing panel according to claim 1 or 2, wherein the cutting blade of the cutting means for cutting the uncured fiber reinforced resin prepreg perforated face plate into predetermined dimensions comprises an ultrasonic wave. Ultrasonic vibration is added by the oscillator to apply frictional heat by ultrasonic vibration only to the cutting portion at the time of cutting, or heat is applied by the heater to apply heat only to the cutting portion at the time of cutting. Characteristic equipment for manufacturing perforated sheet material for aircraft engine nacelle sound absorbing panels.