Manufacturing device for carbon fiber end socket with inner rib of aircraft

Abstract

The invention provides a method for manufacturing an aircraft carbon fiber belt inner rib end socket, which comprises a winding machine, a winding support, a sewing machine, a support, an end socket core mold and a manipulator, the winding machine support is driven by a motor to rotate, and a winding trolley in the winding machine is driven by the motor to move to spirally wind the end socket core mold. The wound carbon fiber end socket is subjected to demolding treatment; the carbon fiber end socket is placed on the support, the reinforcing ribs are placed in the carbon fiber end socket through a mechanical arm, the reinforcing ribs are sewn into the carbon fibers through a sewing machine, and finally the carbon fiber end socket is subjected to heating curing treatment. By means of the carbon fiber winding and sewing process, forming manufacturing of the carbon fiber end socket with the inner rib can be achieved, weight reduction of a current aircraft end socket component can be achieved, meanwhile, the strength and the high-temperature-resistant characteristic of the end socket component are improved, and the carbon fiber end socket has wide application prospects in the aerospace field.

Description

Technical Field

[0001] The present invention relates to the field of processing and manufacturing of carbon fiber belt inner rib heads for aircraft, and specifically relates to the winding and forming of heads and the stitching connection technology of internal reinforcing ribs therein. Background Art

[0002] With the rapid development of society, carbon fiber has been increasingly widely used in industry due to its advantages such as high strength, light weight, good plasticity, good corrosion resistance and wear resistance, such as in the fields of aerospace, automotive manufacturing, construction, etc. With the rapid development of high-tech industries such as aircraft, as a key component of aircraft, on the premise of ensuring the reliability of the head, it is necessary to reduce the weight of the head as much as possible, improve the strength of the head, and optimize the overall performance of the aircraft. Therefore, it is necessary to explore the use of high-strength and lightweight carbon fiber heads with internal ribs to replace traditional metal thin-walled heads. At present, although there are reports on the forming and manufacturing of carbon fiber heads, there is still a lack of manufacturing methods for carbon fiber heads with internal ribs that have more obvious weight reduction effects and more excellent mechanical properties. Therefore, the present invention designs a manufacturing device and process for carbon fiber belt inner rib heads for aircraft.

[0003] After retrieval, the invention patent CN112497587A discloses a method for forming an insulating layer of a fiber-wound engine head, which uses a technology combining bottom layer separate molding and integral molding to solve the problem that traditional axial compression molds cannot effectively separate the artificial debonding layer to the equator line. The steps are as follows: Place the bottom layer in the forming mold to ensure accurate positioning, evenly apply an adhesive to a specific area of the bottom layer, and let it dry naturally; then, on the area of the bottom layer where the adhesive has been applied, attach the insulating layer film according to the designed thickness and shape of the cover layer; after completing the attachment of the cover layer insulating layer film, close the entire mold to ensure that all components are in close contact; finally, place the closed mold in a flat vulcanizing machine for heating and pressure vulcanization treatment to cure the material to form the final product. Although this method effectively overcomes the limitations of traditional technologies, its process flow is relatively cumbersome, the forming cycle is long, and the production efficiency is low.

[0004] After retrieval, the invention patent CN114179393A discloses a method for autoclave molding of a fiber-wound engine head, aiming to improve and simplify the manufacturing process of composite materials or similar structures, while reducing costs and improving efficiency. The steps are as follows: Lay an artificial debonding layer; perform pre-pressing treatment on the laid artificial debonding layer; cover a layer of nylon cloth on the artificial debonding layer; perform pre-treatment on key metal connection parts; lay an insulating layer; use hot pressing technology to laminate all material layers together to form a solid whole and complete the final shape of the product at the same time. The advantage of this method is that it can effectively solve the problems encountered by traditional axial compression methods in separating the artificial debonding layer to the equator line, while reducing the number of mold uses and the overall production cost, and is an economical and efficient manufacturing solution.

[0005] After retrieval, the invention patent CN117989023A discloses a multi-stage head winding structure, aiming to optimize the manufacturing process of the large opening interface of the engine housing. Specifically, the method involves precisely installing a series of evenly spaced yarn hanging rings on the outer wall. These yarn hanging rings serve as fixed points for the circumferential fiber winding operation between two adjacent yarn hanging rings. In addition, the helically wound fibers are ingeniously interwoven between the circumferential fibers and the special annular protrusions. This unique layout effectively avoids the common fiber sliding problem at the large opening joint. By introducing multiple annular protrusions, this technology not only solves the stability problem of the helical fibers but also greatly improves the controllability and efficiency of the winding process of the large opening engine housing, making the winding process more flexible and providing designers with greater freedom to meet the requirements of various complex engine structures. Therefore, this technology is particularly suitable for the manufacturing of engine housings that require large opening designs and has wide applicability and practicality. Summary of the Invention

[0006] To solve the problem of the excessive weight of the head of a metal aircraft, the present invention proposes to first use the winding process to achieve the integral molding of the carbon fiber aircraft head, and then use the stitching process to stitch carbon fiber reinforcing ribs inside the head, thereby realizing the molding and manufacturing of a lightweight and high-strength aircraft carbon fiber head with internal ribs; to solve the problem of time-consuming and laborious manual winding of the aircraft head, the present invention proposes a method for automatically winding carbon fiber with the aid of a winding machine; at the same time, the installation of the reinforcing ribs can be realized with the aid of a manipulator; to make the reinforcing ribs fit more firmly inside the carbon fiber head, the present invention proposes a method of stitching and connecting the reinforcing ribs to the inside of the carbon fiber head with a stitching machine.

[0007] The winding support for carbon fiber winding molding proposed by the present invention includes a motor, a core mold support, a head core mold, a base, a transmission shaft, a bearing seat, a conveyor belt, several bolts, and keys. Among them: the transmission shaft is fixed to the base with two bearing seats; the core mold rotation mechanism is fixed to the transmission shaft with bolts; the head core mold is fixed to the core mold rotation mechanism with several keys; the motor drives the transmission shaft to rotate through the conveyor belt.

[0008] The winding machine proposed by the present invention includes a winding carriage, a lead screw, a base, a fixing plate, a tension mechanism, a wire retreating mechanism, a motor, a bearing seat, a conveyor belt, a spring, a yarn bobbin, and several bolts. Among them: the tension mechanism and the wire retreating mechanism are installed on the fixing plate with bolts; the lead screw is fixed to the base with a bearing seat; the motor drives the lead screw to move through the conveyor belt; the winding carriage is installed on the lead screw, and the yarn enters the winding carriage through the tension mechanism. The winding carriage winds the head core mold by means of the rotation of the lead screw.

[0009] The manipulator proposed by the present invention includes a base, a shaft, a rotating arm, an arm, a wrist, a gripper, a number of nuts and a number of bolts. Among them: the rotating arm is installed on the base through the shaft, nuts and bolts; the arm is installed on the rotating arm through the shaft, nuts and bolts; the wrist is installed on the arm through the shaft, nuts and bolts; the gripper is installed on the wrist through the shaft; a motor is installed inside the base, and the motor provides power to control the movement of the rotating arm, the arm, the wrist and the gripper through a control system, so as to realize the grasping of the reinforcing rib.

[0010] The sewing machine proposed by the present invention replaces the gripper of the manipulator with a sewing device. Among them: the rotating arm is installed on the base through the shaft, nuts and bolts; the arm is installed on the rotating arm through the shaft, nuts and bolts; the wrist is installed on the arm through the shaft, nuts and bolts; the sewing device is installed on the wrist through the shaft; a motor is installed inside the base, and the torque output by the motor is used to control the movement of the rotating arm, the arm, the wrist and the sewing device, so as to sew the reinforcing rib to the inside of the carbon fiber head.

[0011] The simplified steps for implementing the present invention are as follows:

[0012] Step 1: Fix the head core mold to the core mold support, and the winding mechanism winds and forms the head core mold to form a carbon fiber head.

[0013] Step 2: Demold the carbon fiber head.

[0014] Step 3: Place the demolded carbon fiber head on the support, and use the manipulator to place the reinforcing rib inside the carbon fiber head.

[0015] Step 4: Use the sewing device to sew the reinforcing rib to the inside of the carbon fiber head.

[0016] Step 5: Heat and cure the carbon fiber head.

[0017] Through the above steps, problems such as the complex manufacturing process and high labor cost of the aircraft carbon fiber belt with internal ribs head can be satisfactorily solved. Description of the Drawings

[0018] Figure 1 It is the right view of the winding support of the present invention;

[0019] Figure 2 It is the left and right axonometric view of the winding machine of the present invention;

[0020] Figure 3 It is the side view of the winding trolley of the present invention;

[0021] Figure 4 It is the left and right axonometric view of the manipulator of the present invention;

[0022] Figure 5Left and right axonometric view of the reinforcing rib of the present invention;

[0023] Figure 6 Left and right axonometric view of the stitching device of the present invention;

[0024] Figure 7 Left and right axonometric view of the bracket of the present invention.

[0025] In the figure: 1. Head die 2. Key 3. Die bracket 4. Base 5. Motor 6. Conveyor belt 7. Transmission shaft 8. Bearing seat 9. Yarn 10. Motor 11. Conveyor belt 12. Lead screw 13. Winding trolley 14. Bearing seat 15. Base 16. Fixed plate 17. Spring 18. Small guide roller 19. Small guide roller 20. Large guide roller 21 Large guide roller 22. Large guide roller 23. Large guide roller 24. Yarn bobbin 25. Resin tank 26. Threaded hole 27. Base 28. Shaft 29. Nut 30. Rotating arm 31. Arm 32. Wrist 33. Hand claw 34. Reinforcing rib 35. Stitching device 36. Hook needle device 37. Stitching needle 38. Bracket Detailed implementation method

[0026] The example is applicable to the manufacturing process of aircraft carbon fiber heads. This example includes a winding bracket, a winding machine, a manipulator, a stitching machine and a bracket. The winding bracket includes: base 4, motor 5, conveyor belt 6, transmission shaft 7 and bearing seat 8. The two sides of the bearing seat 8 are fixed to the base 4 with bolts, the transmission shaft 7 is fixed to the base 4 through the bearing seat 8, there is a die bracket 3 at the right end of the transmission shaft 7, and the die bracket 3 can ensure that the head die 1 remains unchanged during winding forming, and the head die 1 is fixed to the die bracket 3 through several keys.

[0027] The winding machine includes: yarn 9, motor 1Q, conveyor belt 11, lead screw 12, winding trolley 13, bearing seat 14, base 15 and fixed plate 16. The two sides of the bearing seat 14 are fixed to the base 15 with bolts, the lead screw 12 is fixed through the bearing seats 14 on both sides of the base 15, and the winding trolley 13 and the fixed plate 14 move left and right on the lead screw 12. The guide rollers 18 and 19 form a yarn unwinding mechanism, and the guide rollers 20 - 23 form a tension mechanism. Among them, the yarn unwinding mechanism and the tension mechanism are on the fixed plate 16. The tension mechanism can adjust the tightness of the yarn through the spring 17 according to the positional relationship between the yarn 9 and the winding trolley 13, ensuring that the yarn 9 does not break due to excessive tightness, nor does it make the winding of the head by the winding trolley too loose due to excessive looseness. The winding trolley 13 contains a resin tank 25, the resin tank 25 is filled with resin, the yarn 9 enters the resin tank 25 through the tension mechanism, and the yarn 9 winds the wound head through the winding trolley 13.

[0028] Install the head core mold onto the core mold support. The motor drives the regular rotation of the head core mold. The motor drives the rotation of the lead screw, and the rotation of the lead screw drives the movement of the winding carriage and the fixed plate. While the winding carriage moves, the head core mold rotates, so as to achieve the winding and forming of the head core mold.

[0029] Demold the wound carbon fiber head.

[0030] The manipulator includes a base 27, a shaft 28, a nut 29, a rotating arm 30, an arm 31, a wrist 32, and a gripper 33. The rotating arm 30 is fixed to the base 27 by bolts and nuts. The arm 31 is connected to the rotating arm 30 by bolts and nuts. The wrist 32 is connected to the arm 31 by bolts and nuts. The gripper 33 is connected to the wrist 32 by bolts and nuts. Among them, a motor is installed inside the base 27. The motor provides force and controls the actuator level by level through the control system to achieve the placement of the reinforcing ribs.

[0031] The sewing machine replaces the gripper of the manipulator with a sewing device 35. The sewing device 35 consists of a crochet device 36 and a sewing needle 37. The yarn bobbin is fixed on the surface of the base 27. The yarn conveying pipeline is fixed on the outer surfaces of each component of the sewing machine by low-carbon steel wires. The yarn reaches the sewing device 35 through the conveying pipeline. The sewing device stitches the reinforcing ribs to the carbon fiber head according to the instructions of the control system. Its control method is the same as that of the manipulator and will not be elaborated here.

[0032] Place the demolded head core mold on the support, and then the motor drives the manipulator to place the reinforcing ribs on the head core mold. The sewing machine stitches the placed reinforcing ribs and stitches the reinforcing ribs to the carbon fiber head.

[0033] Heat and cure the carbon fiber head after stitching.

Claims

1. Aircraft carbon fiber belt inner rib head manufacturing device, including a head core mold, a winding bracket, a winding machine, a sewing machine, a manipulator and a bracket, characterized in that: The head core mold is fixed to the winding bracket, and the motor drives the head core mold to rotate. A winding carriage is installed on the winding machine, and the motor drives the winding carriage to operate regularly to wind and form the head core mold; demolding treatment is performed on the wound carbon fiber head; the carbon fiber head is placed on the bracket, and then the reinforcing rib is placed inside the carbon fiber head by a manipulator; then the reinforcing rib is sewn into the inside of the carbon fiber head by a sewing machine; finally, heat curing treatment is performed on the carbon fiber head.

2. The manufacturing device for the aircraft carbon fiber belt inner rib head described in claim 1, characterized in that: The transmission shaft 7 is fixed to the base 4 through the bearing seat 8 and bolts. There is a core mold bracket 3 at the right end of the transmission shaft 7. The head core mold 1 is fixed to the core mold bracket 3 through the key 2. The motor 5 is connected to the transmission shaft 7 through the conveyor belt 6.

3. The aircraft carbon fiber belt inner rib head manufacturing device according to claim 1, characterized in that: The lead screw 12 is fixed to the base 15 through the bearing seat 14 and bolts. The lead screw 12 is connected to the motor 10 through the conveyor belt 11. The winding carriage 13 and the fixing plate 16 are slidably connected to the lead screw 12. The guide rollers 18 and 19 form a wire unwinding mechanism, and the guide rollers 20 - 23 form a tension mechanism. Among them, the wire unwinding mechanism and the tension mechanism are fixed to the fixing plate 16 through a number of bolts.

4. The aircraft carbon fiber belt inner rib head manufacturing device according to claim 1, wherein: The rotating arm 30 is fixed to the base 27 through the shaft 28, nut 29 and a number of bolts. The arm 31 is rotatably connected to the rotating arm 30 through the shaft, nut and a number of bolts. The wrist 32 is rotatably connected to the arm 31 through the shaft, nut and a number of bolts. The gripper 33 is rotatably connected to the wrist 32 through the shaft, nut and a number of bolts.

5. The aircraft carbon fiber belt inner rib head manufacturing device according to claim 1, wherein: Replace the gripper 33 with a sewing device 35. The sewing device 35 is composed of a crochet device and a sewing needle 37, and the others are the same as those in claim 4.

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