Device for paving cap-shaped rib dry fibers and setting method thereof

Abstract

The invention relates to the technical field of automatic forming of composite materials, and provides a device for paving cap-shaped rib dry fibers and an arrangement method of the device. The device comprises a frame, a control box, a movement assembly, a pneumatic compression roller set, an unwinding assembly and a limiting assembly; the control box is arranged on the frame, the two ends of the unwinding assembly and the two ends of the limiting assembly are connected with the frame in a rotatable mode, the moving assembly is arranged at the bottom of the frame, and the pneumatic compression roller sets are arranged on the top face, the bottom face and the side faces of the frame. Wherein the moving assembly comprises wheels and a driving motor; the wheels are movably connected with the frame through the driving motor; according to the device for paving the cap-shaped rib dry fibers and the arrangement method of the device, the device can be suitable for automatically paving the dry fibers of a composite cap-shaped reinforcing rib skin in the ship field, the structure of the device is simplified, the cost of the device is reduced, manpower is saved, and the production efficiency is improved. And the paving efficiency and quality of the cap-shaped reinforcing rib of the composite material structure are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic forming of composite materials, and more particularly, to a device for laying dry fibers of hat-shaped ribs and a setting method thereof. Background Art

[0002] Most ship composite material structures require stiffeners to provide sufficient structural stiffness. The commonly used stiffener type is a hat-shaped rib structure with foam sandwich. Using the foam core as a male mold, dry fibers are laid to form the hat-shaped rib structure. Currently, the laying of the skin of composite material hat-shaped stiffeners mainly relies on manual laying. Manual laying is a repetitive and labor-intensive task with low efficiency, consuming a large amount of labor. At the same time, manual laying requires highly skilled and trained operators. Otherwise, unskilled personnel may have problems such as bulging, wrinkling, and damage during the laying process, affecting the forming quality of the composite material hat-shaped stiffeners. Therefore, it is of great significance to study how to improve the laying efficiency and quality of the skin of composite material hat-shaped stiffeners.

[0003] According to several existing studies on composite material stiffener laying devices, the application number is "CN202311302665.3", and the name is "A variable-width automatic fiber placement roller applicable to rib laying". This invention is applicable to the automatic fiber placement of grid ribs in the aerospace field. Through the variable-width fiber placement roller, it can effectively reduce the requirements for the positioning accuracy of the automatic fiber placement equipment for laying grid rib structures and the manufacturing cost of the roller caused by laying non-constant-width prepreg tows, and can shorten the manufacturing and replacement time of the automatic fiber placement roller. The application number is "202411623604.1", and the name is "A forming device and method for a longitudinal and transverse stiffened panel based on automatic fiber placement of skin". This invention is applicable to the forming of longitudinal and transverse stiffened panels in the aviation field. By designing a metal core mold and a metal positioning card, it can effectively control the axis deviation requirements of longitudinal and transverse stiffeners. The application number is "202311762308.5", and the name is "A composite material stiffened panel laying and forming device and its use method". This invention is applicable to the forming of stiffened panels in the aviation field. By designing a stiffened panel laying and forming device and adopting the method of curing the ribs first and then curing the panel secondarily, it solves the problems of difficult forming and poor forming effect of traditional ribs. However, since the current composite material stiffener laying devices rarely involve automatic laying, and most of the published patents are applicable to the laying of prepreg ribs in the aerospace field, the rib forms are very different from the hat-shaped rib structure. Therefore, it cannot solve the problem of how to improve the laying efficiency and quality of the skin of composite material hat-shaped stiffeners.

[0004] In addition, there is no automatic laying device in the prior art specifically designed for the dry fiber laying of the hat-shaped rib structure with foam core. The hat-shaped rib structure with foam core has five laying surfaces, namely the top surface, two side surfaces, and two flanging sides, which are not in the same plane. For traditional automatic fiber placement and tape laying equipment, the laying of the hat-shaped rib structure is difficult and not suitable for dry fiber materials, so it is impossible to efficiently complete the laying of the composite material hat-shaped stiffener skin.

[0005] In addition, Patent CN118721784B discloses a device and processing method for in-situ forming of high-temperature thermoplastic composite materials. The device includes a flange, a flange adapter plate, a connecting plate, and a pressure control mechanism, a unwinding mechanism, a tension mechanism, a guiding mechanism, a thermocouple heating mechanism, a refeeding mechanism, a shearing mechanism, a rolling mechanism, and a laser heating mechanism installed on the connecting plate. Among them, the flange is connected to the flange adapter plate, and the flange adapter plate is connected to the connecting plate; the pressure control mechanism is located on the back of the connecting plate; the unwinding mechanism is located at the end of the connecting plate; the tension mechanism is located behind the unwinding mechanism; the guiding mechanism is located between the tension mechanism and the rolling mechanism; the thermocouple heating mechanism is located above the guiding mechanism and partially overlaps with the guiding mechanism, and the prepreg tape is slowly heated when passing through the guiding mechanism by means of contact heating; the refeeding mechanism is located in the middle of the guiding mechanism; the shearing mechanism is located in the middle of the guiding mechanism, behind the refeeding mechanism; the laser heating mechanism is installed on the connecting plate through an angle adjustment component to heat the prepreg tape to reach the bonding temperature; the rolling mechanism is located behind the guiding mechanism, at the end of the device, and is attached to the surface of the workpiece by rolling; thus, the curing process can be completed while winding, eliminating the process of switching stations in the traditional process, and improving the laying quality and laying efficiency. However, this forming device is fixedly arranged, and it is still the laying of ribs on the prepreg, and it has not been able to effectively realize the laying of dry fibers in the hat-shaped ribs. Moreover, the overall forming device has the problems of low flexibility in use, relatively complex structure. Summary of the Invention

[0006] In view of this, the present invention aims to propose a device and its setting method for laying dry fibers of hat-shaped ribs to solve the problems in the prior art that the efficiency of manually laying the hat-shaped stiffener skin is low, and the laying quality of the skin is easily affected by the proficiency of the operator. Even when using traditional automatic fiber placement and tape laying equipment, due to the high laying difficulty of the hat-shaped rib structure and its incompatibility with dry fiber materials, there are still problems such as low laying efficiency and poor laying quality of the dry fibers of the hat-shaped ribs, low flexibility in using the device, and relatively complex structure of the device. Thus, it can achieve automatic dry fiber laying of the composite material hat-shaped stiffener skin applicable to the ship field, effectively and greatly improve the laying efficiency and quality of the composite material structure hat-shaped stiffener, simplify the structure of the device, reduce the cost of the device, improve the automation degree of the device, and save the use of manpower.

[0007] To achieve the above object, the technical solution of the present invention is implemented as follows:

[0008] The present invention relates to a device for laying dry fibers of hat-shaped ribs and a setting method thereof. The device for laying dry fibers of hat-shaped ribs includes a vehicle frame, a control box, a motion assembly, a pneumatic pressure roller group, a pay-off assembly, and a limiting assembly. The control box is arranged on the vehicle frame. Both ends of the pay-off assembly and the limiting assembly are rotatably connected to the vehicle frame. The motion assembly is arranged at the bottom of the vehicle frame. The pneumatic pressure roller group is arranged on the top surface, bottom surface, and side surface of the vehicle frame. Among them, the motion assembly includes wheels and a driving motor. The wheels are movably connected to the vehicle frame through the driving motor.

[0009] Further, the inner side wall of the wheel is attached to the outer side wall of the driving shaft of the driving motor, and the driving motor is connected to the vehicle frame by screws.

[0010] Further, the vehicle frame includes a vehicle body and a vehicle roof. The vehicle body is a frame structure. The vehicle roof is arranged at the top of the rear end of the vehicle body. Both left and right ends of the pay-off assembly are rotatably arranged at the top of the front end of the vehicle body. The control box is arranged at the top of the rear end of the vehicle roof. The motion assembly is arranged at the bottom of the vehicle body. The pneumatic pressure roller group and the limiting assembly are both arranged inside the vehicle body.

[0011] Further, the vehicle body includes a rear panel, a left panel, a front panel, and a right panel. The rear panel, the left panel, the front panel, and the right panel are sequentially connected end to end to form a closed-loop frame structure.

[0012] Further, the pneumatic pressure roller group includes side pressure rollers, bottom pressure rollers, and top pressure rollers. The side pressure rollers are installed inside the left panel and / or the right panel of the vehicle frame. The bottom pressure rollers and the top pressure rollers are both arranged inside the vehicle roof.

[0013] Further, at least one side pressure roller, bottom pressure roller, and top pressure roller are provided.

[0014] Further, the side pressure roller includes a first bracket, a first cylinder, a rotary module, a second bracket, a pressure roller shaft, a pressure roller bearing, and a first pressure roller part. One end of the first bracket is sequentially connected to the pressure roller shaft through the first cylinder, the rotary module, and the second bracket. The other end of the first bracket is connected to the left panel and / or the right panel of the vehicle frame. The outer side wall of the pressure roller shaft is attached to the inner side wall of the first pressure roller part through the pressure roller bearing.

[0015] Further, the side pressure roller further includes a limit screw, and the limit screw is arranged at one end of the second bracket close to the rotary module.

[0016] A setting method of a device for laying dry fibers of hat-shaped ribs, the method is applied to the device for laying dry fibers of hat-shaped ribs, and the method includes the following steps:

[0017] Step 1. Obtaining material parameters: Obtain the relevant material properties between the fabric to be laid and the pressure roller.

[0018] Step 2. Establishing and assembling the 3D model: Use modeling software to establish the 3D models of the rib laying die and each pressure roller within the pneumatic pressure roller group.

[0019] Step 3. Inputting material parameters: In the finite element analysis software, input the relevant material properties of the fabric to be laid obtained.

[0020] Step 4. Finite element analysis: In the finite element analysis software, based on the actual laying situation, create the contact, load, and boundary conditions between the fabric to be laid, the laying die, and the pressure roller, and conduct a finite element explicit dynamic analysis of the laying process.

[0021] Step 5. Optimizing the layout of the pressure roller mechanism: According to the results of the finite element analysis software, determine whether there is stress concentration in the fabric to be laid. If so, optimize the layout of the pressure roller mechanism and return to Step 2; if not, obtain the optimal layout method of the pressure roller mechanism and complete the layout setting of each pressure roller within the pneumatic pressure roller group of the device.

[0022] Furthermore, in Step 1, the relevant material properties include any one or more of the rolling friction coefficient μ1 between the fabric to be laid and the pressure roller, the sliding friction coefficient μ2 between the fabric to be laid and the die surface, the elastic modulus E of the fabric to be laid, and the Poisson's ratio ν.

[0023] Compared with the prior art, the device and its setting method for dry fiber laying of hat-shaped ribs of the present invention have the following beneficial effects:

[0024] Through the setting of the device, it is possible to achieve the automatic laying of dry fibers for the composite material hat-shaped stiffener skin in the ship field, effectively simplify the structure of the device, reduce the cost of the device, improve the automation level of the device, and save the use of manpower; in addition, through the setting of the method, it is possible to effectively optimize the structural setting of the device, thereby greatly improving the laying efficiency and quality of the composite material structure hat-shaped stiffener. Description of the Drawings

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 is the overall structural schematic diagram of the device for dry fiber laying of hat-shaped ribs;

[0027] Figure 2 is the first perspective structural schematic diagram of the device for dry fiber laying of hat-shaped ribs;

[0028] Figure 3 is Figure 2 the schematic diagram of the cut-away view at A-A in

[0029] Figure 4 the schematic diagram of the structure of the side pressure roller;

[0030] Figure 5 the schematic diagram of the structure of the top pressure roller;

[0031] Figure 6 the schematic diagram of the flow chart of the setting method of the device.

[0032] Description of the reference numerals in the drawings: 1, vehicle frame; 11, vehicle body; 111, rear panel; 112, left panel; 113, front panel; 114, right panel; 12, vehicle roof; 121, roof panel; 122, top cover; 2, control box; 3, moving component; 31, wheel; 32, drive motor; 4, pneumatic pressure roller group; 41, side pressure roller; 410, first pressure roller part; 411, first bracket; 412, first cylinder; 413, rotating module; 414, second bracket; 415, pressure roller shaft one; 416, pressure roller shaft bearing one; 417, first retaining ring; 418, second retaining ring; 419, limit screw; 42, bottom pressure roller; 43, top pressure roller; 431, second cylinder; 432, third bracket; 4321, first plate; 4322, second plate; 4323, third plate; 433, second pressure roller part; 434, pressure roller shaft bearing two; 435, pressure roller shaft two; 5, unwinding component; 6, limiting component; 70, arc-shaped notch; 71, mounting groove; 72, handle; 73, car door; 74, panel main body; 75, second groove; 76, first groove; 77, through hole; 78, limiting step. Detailed implementation manners

[0033] The following will use the terms that those skilled in the art typically use to convey the essence of their work to other technicians in the art to describe the inventive concept of the present disclosure. However, these inventive concepts may be embodied in many different forms and thus should not be considered limited to the embodiments described herein.

[0034] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0037] This embodiment is directed to a composite material automatic forming device. Similar to the conventional composite material forming device, the overall structure is composed of rollers, a unwinding mechanism, and a motor.

[0038] In order to solve the problems in the prior art that the efficiency of manually laying the hat-shaped stiffener skin is relatively low, the laying quality of the skin is easily affected by the proficiency of the operator, and even when using traditional automatic fiber placement and tape laying equipment, due to the high laying difficulty of the hat-shaped rib structure and the incompatibility with dry fiber materials, there are still problems such as low laying efficiency and poor laying quality of the hat-shaped rib dry fiber, as well as low flexibility in using the device and relatively complex device structure; this embodiment proposes a device for laying hat-shaped rib dry fiber and its setting method. The device for laying hat-shaped rib dry fiber, that is, a self-propelled vehicle type hat-shaped stiffener dry fiber laying equipment in a composite material automatic laying equipment, includes a vehicle frame 1, a control box 2, a motion assembly 3, a pneumatic pressure roller group 4, a unwinding assembly 5, and a limiting assembly 6. The bottom of the control box 2 is arranged on the vehicle frame 1. Both ends of the unwinding assembly 5 and the limiting assembly 6 are connected to the vehicle frame 1 in a rotatable manner. The motion assembly 3 is arranged at the bottom of the vehicle frame 1, and the pneumatic pressure roller group 4 is arranged on the top surface, bottom surface, and side surface of the vehicle frame 1. Among them, the motion assembly 3 includes wheels 31 and a driving motor 32. The wheels 31 are connected to the vehicle frame 1 through the driving motor 32 in a movable manner. Specifically, the inner side wall of the wheels 31 is attached to the outer side wall of the driving shaft of the driving motor 32, and the driving motor 32 is connected to the wall plate of the vehicle frame 1 by screws. At least 4 wheels 31 are provided. At least one driving motor 32 is provided, and the specific number of wheels 31 and driving motors 32 are set according to requirements.

[0039] Through the setting of the device, it is possible to perform profiling laying on the hat-shaped stiffener skin of the composite material structure of a large ship; among them, the vehicle frame 1 serves as the main frame of the self-propelled vehicle type hat-shaped rib dry fiber laying device, the control box 2 serves as the control system of the self-propelled vehicle type hat-shaped rib dry fiber laying device, the wheels 31 can support the weight of the self-propelled vehicle type hat-shaped rib dry fiber laying device and move forward, the pneumatic pressure roller group 4 has the ability to shape and lay the dry fiber laying material, the unwinding assembly 5 has the function of storing and unwinding the material roll of the dry fiber laying material, the limiting pressure roller, that is, the limiting assembly 6, has the limiting and guiding function of the self-propelled vehicle type hat-shaped rib dry fiber laying device along the stiffener, and the driving motor 32 provides the power for the self-propelled vehicle type hat-shaped rib dry fiber laying device to move forward. Through the coordinated setting of each component in the above device, it is possible to realize the automatic laying of dry fiber for the hat-shaped stiffener skin of the composite material in the field of large ships, effectively simplify the structure of the device, reduce the cost of the device, improve the automation degree of the device, and save the use of manpower.

[0040] The frame 1 includes a body 11 and a roof 12. The body 11 is of a frame structure. The roof 12 is arranged at the top of the rear end of the body 11. The left and right ends of the unwinding assembly 5 are rotatably arranged at the top of the front end of the body 11. The control box 2 is arranged at the top of the rear end of the roof 12. The motion assembly 3 is arranged at the bottom of the body 11. The pneumatic pressure roller group 4 and the limiting assembly 6 are both arranged inside the body 11.

[0041] Through the arrangement of the device, it can be applied to the automatic laying of dry fibers for the composite structure hat-shaped stiffener skin in the field of large ships. By adopting the self-propelled trolley structure, the structure of the device is made simpler and more compact, which is convenient for the maintenance of the device, and can complete the profiling paving of the top surface, left and right side surfaces and bottom surface of the composite structure hat-shaped stiffener skin at one time, which can greatly improve the laying efficiency of the composite structure hat-shaped stiffener skin.

[0042] Specifically, the body 11 includes a rear panel 111, a left panel 112, a front panel 113 and a right panel 114. The rear panel 111, the left panel 112, the front panel 113 and the right panel 114 are sequentially connected end to end to form a closed-loop frame structure. The pneumatic pressure roller group 4 and the limiting assembly 6 are both arranged inside the closed-loop frame. The roof 12 includes a top plate 121 and a top cover 122. The rear, left and right sides of the top plate 121 are arc-connected to the tops of the rear panel 111, the left panel 112 and the right panel 114 respectively. The front side of the top plate 121 is arc-connected to the rear side of the top cover 122. The left and right sides of the top cover 122 are connected to the tops of the left panel 112 and the right panel 114 respectively. Among them, the inside of the top cover 122 is a hollow structure. The control box 2 is arranged on the top of the top plate 121.

[0043] Through the arrangement of the structures inside the body 11 and the roof 12, it can not only provide installation space for the components inside the device, but also avoid interfering with the operation of the device components through the hollow structure of the body 11, and can also facilitate the cooperation with the motion assembly 3 to realize the flexible movement of the device and improve the flexibility of the device operation. Through the arrangement of the top cover 122, it is convenient for the installation of the internal pneumatic pressure roller group 4, can protect the internal components of the device, and is also beneficial to dust and water protection.

[0044] In addition, arc-shaped notches 70 are provided at the top front ends of the left panel 112 and the right panel 114, and the positions of the arc-shaped notches 70 on the left panel 112 correspond to those of the arc-shaped notches 70 on the right panel 114. The left and right ends of the unwinding assembly 5 are respectively rotatably embedded in the arc-shaped notches 70 on the left panel 112 and the right panel 114. Installation grooves 71 are respectively provided at the bottom rear ends and the front ends of the left panel 112 and the right panel 114. The installation grooves 71 are recessed inward, and the installation grooves 71 are used to facilitate the installation of the wheels 31. Preferably, the left panel 112 and the right panel 114 are both composed of a panel main body 74, a car door 73, and a handle 72. The handle 72 is provided on the car door 73, and the outer side wall of the car door 73 is detachably attached to the panel main body 74. A first groove 76 is provided on the rear panel 111, and a second groove 75 is provided on the front panel 113. The positions of the first groove 76 and the second groove 75 correspond to each other. The opening sizes of the top and bottom ends of the first groove 76 are respectively larger than those of the top and bottom ends of the second groove 75.

[0045] Through the setting of the arc-shaped notches 70, it is beneficial to the stability and reliability of the installation of the unwinding assembly 5 on the vehicle frame 1, avoiding the occurrence of slipping phenomena during the operation of the unwinding assembly 5, and effectively improving the safety of the operation of the unwinding assembly 5. Through the concave setting of the installation grooves 71, it can not only provide space for the installation of the wheels 31, but also prevent the dust and fluff driven by the movement of the wheels 31 from affecting the normal operation of the internal components. Through the setting of the detachable car doors 73 on the left panel 112 and the right panel 114, it is convenient to repair and maintain the device, improve the efficiency of repair and maintenance, and is also beneficial to the cleaning of the device. In addition, through the difference in the sizes of the first groove 76 and the second groove 75, the paving efficiency of the device can be effectively improved, and it is also beneficial to play an auxiliary role in the limiting assembly 6 and improve the operation reliability of the device.

[0046] The pneumatic pressing roller group 4 includes a side pressing roller 41, a bottom pressing roller 42, and a top pressing roller 43. The side pressing roller 41 is installed on the inner side of the left panel 112 and / or the right panel 114 of the vehicle frame 1. The bottom pressing roller 42 and the top pressing roller 43 are both provided on the inner side of the roof 12 of the vehicle frame 1. Among them, at least one side pressing roller 41, bottom pressing roller 42, and top pressing roller 43 is provided. In this embodiment, two side pressing rollers 41 and two bottom pressing rollers 42 are provided, and one top pressing roller 43 is provided. The five pressing roller assemblies are all pneumatic pressing roller mechanisms that can be independently controlled. Moreover, the structures and installation methods of the pneumatic pressing roller mechanisms of the side pressing roller 41, bottom pressing roller 42, and top pressing roller 43 are the same, and the telescopic length and pressure of the cylinders in each independent pneumatic pressing roller mechanism can be individually controlled. Due to the different installation positions in the vehicle frame 1, the connection brackets of the five pressing roller assemblies to the vehicle frame 1 are different.

[0047] By setting up the pneumatic pressure roller group 4 which is the core mechanism inside the device and adopting a reasonable arrangement of the pressure rollers, the function of the pneumatic pressure roller group 4 to effectively lay the reinforcing ribs can be achieved to a great extent, and the laying efficiency and laying accuracy of the device for the reinforcing ribs can be improved. In addition, the pneumatic pressure roller group 4 includes several independent pneumatic pressure roller groups 4 that can be controlled separately, so that a single dry fiber sheet is attached to the hat-shaped rib mold and compacted. This self-propelled trolley type laying mechanism has the characteristics of simple and compact structure, adaptability to different sizes of ribs, high automation, controllable pressure and high laying efficiency.

[0048] The side pressure roller 41 includes a first bracket 411, a first cylinder 412, a rotary module 413, a second bracket 414, a pressure roller shaft 415, a pressure roller shaft bearing 416 and a first pressure roller part 410. One end of the first bracket 411 is sequentially connected to the pressure roller shaft 415 through the first cylinder 412, the rotary module 413 and the second bracket 414. The other end of the first bracket 411 is connected to the left panel 112 and / or the right panel 114 of the vehicle frame 1. The outer side wall of the pressure roller shaft 415 is attached to the inner side wall of the first pressure roller part 410 through the pressure roller shaft bearing 416. The side pressure roller 41 also includes a first retaining ring 417 and a second retaining ring 418. The first retaining ring 417 is arranged at the bottom of the pressure roller shaft 415, and the second retaining ring 418 is arranged at the top of the pressure roller shaft 415. The inner side walls of the first retaining ring 417 and the second retaining ring 418 are both attached to the outer side wall of the pressure roller shaft 415. The top of the first retaining ring 417 is attached to the bottom of the pressure roller shaft bearing 416 arranged at the bottom end of the pressure roller shaft 415; the bottom of the second retaining ring 418 is attached to the top of the second bracket 414, and the second retaining ring 418 is used to position the position of the pressure roller shaft 415. The side pressure roller 41 also includes a limit screw 419. The limit screw 419 is arranged at one end of the second bracket 414 close to the rotary module 413, and the limit screw 419 is used to limit the rotation angle of the side pressure roller 41. In this embodiment, the first bracket 411 is connected to one side of the first cylinder 412 through bolts, and the other side of the first cylinder 412 is connected to one side of the rotary module 413 through screws; the other side of the rotary module 413 is connected to one end of the second bracket 414 through bolts, and the other end of the second bracket 414 is connected to the pressure roller shaft 415 through the second retaining ring 418. At least two pressure roller shaft bearings 416 are arranged, and the two pressure roller shaft bearings 416 are respectively arranged at one end of the pressure roller shaft 415 close to the second bracket 414 and the bottom end.

[0049] By setting up the rotary module 413, the rotation of the side pressure roller module can be realized, so that the side pressure roller 41 fits the inclined angle of the mold side to complete the profiling laying. Through the combined setting of the two pressure roller shaft bearings 416, the first retaining ring 417 and the second retaining ring 418, the positioning and installation among the pressure roller shaft 415, the second bracket 414 and the pressure roller shaft bearing 416 can be realized.

[0050] The top surface pressing roller 43 includes a second air cylinder 431, a third support 432, a second pressing roller part 433, a second bearing for the pressing roller shaft 434, and a second shaft of the pressing roller 435. One end of the second air cylinder 431 is connected to the vehicle frame 1, and the other end of the second air cylinder 431 is connected to the left and right ends of the second shaft of the pressing roller 435 through the third support 432. The outer side walls of the left and right ends of the second shaft of the pressing roller 435 are respectively connected to the inner side walls of the second pressing roller part 433 through the second bearings for the pressing roller shaft 434. At least two second bearings for the pressing roller shaft 434 are provided. In this embodiment, the other end of the second air cylinder 431 is connected to the third support 432 by bolts.

[0051] Through the arrangement of the components inside the top surface pressing roller 43, the top surface pressing roller 43 can effectively independently control the second pressing roller part 433 to perform the paving movement. It can also cooperate with the side pressing roller 41, which can greatly improve the paving efficiency of the device.

[0052] Among them, the third support 432 includes a first plate 4321, a second plate 4322, and a third plate 4323. The first plate 4321 is connected to the third plate 4323 through the second plate 4322. A third groove is formed between the first plate 4321, the second plate 4322, and the third plate 4323. The second pressing roller part 433, the second bearing for the pressing roller shaft 434, and the second shaft of the pressing roller 435 are all partially arranged in the third groove. The first plate 4321 and the third plate 4323 both include through holes 77 and limiting steps 78. The positions of the through holes 77 and the limiting steps 78 on the first plate 4321 correspond to the positions of the through holes 77 and the limiting steps 78 on the third plate 4323. The left and right ends of the second shaft of the pressing roller 435 are respectively embedded in the through holes 77 on the first plate 4321 and the third plate 4323. The limiting steps 78 on the first plate 4321 and the third plate 4323 are respectively in close contact with the outer sides of the second bearings for the pressing roller shaft 434 at the corresponding positions.

[0053] Through the special arrangement of the structure of the third support 432, it can not only provide an installation space for the second pressing roller part 433, the second bearing for the pressing roller shaft 434, and the second shaft of the pressing roller 435 inside the top surface pressing roller 43, but also improve the tightness and reliability of the structure among the three, and more importantly, can reduce the overall occupied space of the top surface pressing roller 43.

[0054] It should be noted that the bottom surface pressing roller 42 has the same structure as the top surface pressing roller 43, and the pneumatic pressing roller group 4 includes five pneumatic pressing roller mechanisms that can be independently controlled. Among them, each of the side pressing roller 41 and the bottom surface pressing roller 42 contains two pneumatic pressing roller mechanisms, the top surface pressing roller 43 contains one pneumatic pressing roller mechanism, the bottom surface pressing roller 42 and the top surface pressing roller 43 are respectively installed inside the rear side and the top side of the vehicle frame 1, and the side pressing roller 41 is respectively installed on the left and right sides inside the vehicle frame 1.

[0055] The limiting component 6 includes a fourth support, a second rotating module, a third roller section, a third retaining ring, a third roller bearing, and a third roller shaft. One side of the fourth support is connected to the inner side of the front panel 113 of the vehicle frame 1 through the second rotating module, and the other side of the fourth support is connected to one end of the third roller shaft. The other end of the third roller shaft is respectively connected to the inner side walls of the third retaining ring and the third roller bearing, and the outer side wall of the third roller bearing is attached to the inner side wall of the third roller section. The inner side wall of the third retaining ring is attached to the outer side wall of the corresponding third roller bearing. Among them, at least two third roller bearings are provided. When two third roller bearings are provided, the two third roller bearings are respectively arranged at one end near the fourth support at the top of the third roller shaft and at the bottom end. The limiting component 6 further includes a round nut. The inner side wall of the round nut is sleeved on the outer side wall at the top of the third roller shaft, and the bottom side of the round nut is attached to the top of the fourth support. Among them, the fourth support is connected to the front panel 113 of the vehicle frame 1 through the rotating shaft and torsion spring of the second rotating module. In addition, one side of the second rotating module is connected to the front panel 113 of the vehicle frame 1 by screws, the other side of the second rotating module is connected to the fourth support by bolts, and the fourth support is connected to the third roller shaft through the third retaining ring. In this embodiment, at least one limiting component 6 is provided. Preferably, two limiting components 6 are provided, and the two limiting components 6 are symmetrically arranged on the front panel 113 of the vehicle frame 1.

[0056] Through the setting of the second rotating module, it not only has the effect of improving the connection tightness between the vehicle frame 1 and the limiting component 6, but also enables the limiting component 6 to rotate within a certain angle to better fit the surface of the mold. Through the setting of the two limiting components 6, it can effectively provide positioning for the material during the laying process of the device.

[0057] A setting method for a device for laying dry fibers of hat-shaped ribs, the method is applied to setting the device for laying dry fibers of hat-shaped ribs, and is used to determine the arrangement mode between the material roll and each pneumatic roller mechanism in the device; the method includes the following steps:

[0058] Step 1: Obtain material parameters: Obtain the relevant material properties between the cloth to be laid and the roller.

[0059] Step 2: Establish and assemble the 3D model: Use modeling software to establish the 3D model between the rib laying mold and each roller in the pneumatic roller group 4.

[0060] Step 3: Input material parameters: In the finite element analysis software, input the relevant material properties of the cloth to be laid obtained.

[0061] Step 4: Finite element analysis: In the finite element analysis software, based on the actual laying situation, create the contact, load, and boundary conditions between the cloth to be laid, the laying mold, and the roller, and perform finite element explicit dynamic analysis on the laying process.

[0062] Step 5. Optimization of the arrangement of the pressure roller mechanism: According to the results of the finite element analysis software, determine whether there is stress concentration in the fabric to be laid. If yes, optimize the arrangement of the pressure roller mechanism and return to Step 2; if no, obtain the optimal arrangement of the pressure roller mechanism and complete the arrangement setting of each pressure roller in the pneumatic pressure roller group 4 in the device.

[0063] Among them, in Step 1, the relevant material properties include any one or more of the rolling friction coefficient μ1 between the fabric to be laid and the pressure roller, the sliding friction coefficient μ2 between the fabric to be laid and the surface of the mold, the elastic modulus E and Poisson's ratio ν of the fabric to be laid. In this embodiment, μ1 and μ2 can be measured by a friction coefficient experiment, and E and ν are provided by the fabric manufacturer. In this embodiment, the finite element analysis software uses abaqus.

[0064] Through the settings of the above method, the structural settings of the device can be effectively optimized. Compared with manual laying, the laying efficiency and quality of the composite material structural hat-shaped stiffener can be greatly improved. And it can be widely applied to the production of composite material structural hat-shaped stiffeners in the fields of ships, aerospace, high-speed rail, etc., saving labor costs and providing economic benefits.

[0065] Step 2 includes:

[0066] Step S21: Establishment and assembly of the 3D model: Use modeling software to establish a 3D model of the rib laying mold, the fabric to be laid, and the five pressure rollers in the pneumatic pressure roller group 4; the five pressure rollers are two side pressure rollers 41, two bottom pressure rollers 42, and one top pressure roller 43 respectively;

[0067] Step S22: Assembly of the 3D model, assemble based on the actual situation of the device to ensure that the fabric to be laid is located between the laying mold and the pressure roller.

[0068] Among them, in Step S21, during the establishment of the 3D model, the five pressure rollers in the pneumatic pressure roller group 4 can be simplified to cylinders to reduce the calculation amount. The fabric to be laid can be set as a thin plate or a solid structure. In Step 3, the relevant material properties input include the elastic modulus E and Poisson's ratio ν of the fabric to be laid.

[0069] By establishing and assembling the 3D model of the device, the actual situation of the device can be effectively input into the system, laying a foundation for the subsequent analysis of the arrangement of the positions of the five pressure rollers in the device by the finite element analysis software, and further facilitating the realization of the motion simulation of the device by the software. It is more conducive to the realization of the efficient, reliable and low-cost setting of the device.

[0070] Step 4 includes:

[0071] Step S41: In the finite element analysis software, based on the actual laying situation, define the five pressure rollers and the laying die material as rigid bodies to simplify the simulation;

[0072] Step S42: Define the fabric material based on the fabric characteristics;

[0073] Step S43: Create the contacts, loads, and boundary conditions among the fabric to be laid, the laying die, and the pressure rollers: Set the contact between the fabric and the pressure rollers as "surface - surface" contact, and select "hard contact" for the contact between the fabric and the die; this is used to ensure no penetration, and fill in the rolling friction coefficient μ1 between the fabric to be laid and the pressure rollers, and the sliding friction coefficient μ2 between the fabric to be laid and the die surface to simulate the actual sliding.

[0074] Step S44: Conduct a finite element explicit dynamic analysis of the laying process: Define the motion paths of each pressure roller, and use displacement or velocity control to simulate the dynamic process of the pressure rollers rolling along the fabric surface. Apply rotational boundary conditions to each pressure roller to make it roll along the set path, set the boundary condition of the die to be fixed, and apply a slight pre - tightening force to the fabric at the laying starting point to simulate its actual constraint.

[0075] By creating the relevant information of the device, die, and fabric to be laid based on the actual laying situation in the finite element analysis software in Step Four, and setting up the finite element explicit dynamic analysis during the laying process, the accuracy of the established three - dimensional model can be effectively improved, the error between the analysis result and the actual operation can be reduced, and the use of the fabric to be laid can also be saved.

[0076] Step Five includes:

[0077] Step S51: Optimize the layout of the pressure roller mechanism: According to the results of the finite element analysis software, observe the wrinkling situation of the fabric to be laid in the model and the stress distribution of the fabric caused by the movement of the pressure rollers;

[0078] Step S52: Based on the observed structure, judge whether there is stress concentration in the fabric to be laid. If yes, execute Step S53; if no, obtain the optimal layout method of the pressure roller mechanism and complete the layout setting of each pressure roller in the pneumatic pressure roller group 4 inside the device.

[0079] Step S53: Optimize the layout of the pressure roller mechanism, adjust the positional relationship between the five pressure rollers, and return to Step Two.

[0080] After observing the analysis results of the finite element analysis software in Step 5, it is judged whether the current setting positions of the five pressure rollers are appropriate. In case of inappropriateness, after timely performing simulation, the arrangement mode of the five pressure rollers is adjusted until the best position relationship of the pressure rollers with the most uniform stress distribution and no stress concentration phenomenon is found. By this method, on the one hand, it can avoid the stress concentration phenomenon generated by the pressure rollers on the fabric during paving, reduce the number of wrinkles generated on the fabric, and on the other hand, it can also greatly improve the forming quality of the composite material structure hat-shaped stiffener skin. Determining the actual arrangement mode of the five pressure rollers through modeling analysis is beneficial to avoiding the inconvenience of manually adjusting the positions of the pressure rollers through multiple experiments, and is also beneficial to saving the time of manual adjustment and enhancing the efficiency of device position setting.

[0081] In the present invention, for any composite material automatic forming device, it may include the device structure for laying dry fibers of hat-shaped ribs described in this embodiment. On the basis of the relevant structures and assembly relationships of the vehicle frame 1, the wheels 31, and the control box 2 provided in this embodiment, the composite material forming device further includes conventional components such as rollers, unwinding mechanisms, motors, etc.; since they are all prior arts, no further elaboration will be made here.

[0082] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for laying hat-shaped rib fibers, characterized in that: The invention comprises a vehicle frame (1), a control box (2), a motion component (3), a pneumatic pressure roller group (4), an unwinding component (5) and a limit component (6); the control box (2) is arranged on the vehicle frame (1); both ends of the unwinding component (5) and the limit component (6) are connected to the vehicle frame (1) in a rotatable manner; the motion component (3) is arranged at the bottom of the vehicle frame (1); and the pneumatic pressure roller group (4) is arranged on the top surface, the bottom surface and the side surface of the vehicle frame (1); wherein the motion component (3) comprises a wheel (31) and a drive motor (32); and the wheel (31) is connected to the vehicle frame (1) in a movably manner via the drive motor (32).

2. The device for laying hat-shaped rib fibers according to claim 1, characterized in that: The inner wall of the wheel (31) is in contact with the outer wall of the drive shaft of the drive motor (32), and the drive motor (32) is connected to the vehicle frame (1) via screws.

3. The device for laying hat-shaped rib fibers according to claim 1, characterized in that: The frame (1) comprises a body (11) and a roof (12); the body (11) is a frame structure; the roof (12) is arranged at the top of the rear end of the body (11); the left and right ends of the unwinding assembly (5) are rotatably arranged at the top of the front end of the body (11); the control box (2) is arranged at the top of the rear end of the roof (12); the motion assembly (3) is arranged at the bottom of the body (11); and the pneumatic pressure roller group (4) and the limit assembly (6) are both arranged inside the body (11).

4. The device for laying hat-shaped rib fibers according to claim 3, characterized in that: The vehicle body (11) comprises a rear panel (111), a left panel (112), a front panel (113) and a right panel (114); the rear panel (111), the left panel (112), the front panel (113) and the right panel (114) are connected end to end in sequence to form a closed-loop frame structure.

5. The device for laying hat-shaped rib fibers according to claim 4, characterized in that: The pneumatic pressure roller group (4) comprises a side pressure roller (41), a bottom pressure roller (42) and a top pressure roller (43); the side pressure roller (41) is installed on the inner side of the left panel (112) and / or the right panel (114) of the vehicle frame (1); the bottom pressure roller (42) and the top pressure roller (43) are both arranged on the inner side of the vehicle roof (12).

6. The device for laying hat-shaped rib fibers according to claim 5, characterized in that: At least one of the side pressure rollers (41), the bottom pressure roller (42) and the top pressure roller (43) is provided.

7. The device for laying hat-shaped rib fibers according to claim 6, characterized in that: The side pressure roller (41) comprises a first bracket (411), a first cylinder (412), a rotating module (413), a second bracket (414), a pressure roller shaft (415), a pressure roller shaft bearing (416) and a first pressure roller portion (410); one end of the first bracket (411) is connected to the pressure roller shaft (415) via the first cylinder (412), the rotating module (413) and the second bracket (414) in sequence, the other end of the first bracket (411) is connected to the left panel (112) and / or the right panel (114) of the vehicle frame (1), and the outer side wall of the pressure roller shaft (415) is in contact with the inner side wall of the first pressure roller portion (410) via the pressure roller shaft bearing (416).

8. The device for laying hat-shaped rib fibers according to claim 7, characterized in that: The side pressure roller (41) further comprises a limit screw (419), wherein the limit screw (419) is arranged at one end of the second bracket (414) close to the rotating die set (413).

9. A method for setting up a device for laying hat-shaped rib fibers, characterized in that: The method is applied to a device for laying hat-shaped rib fibers according to any one of claims 1 to 8, and the method comprises the following steps: Step 1: Obtaining material parameters: Obtaining relevant material properties between the fabric to be laid and the pressure roller; Step 2: Establishment and assembly of a three-dimensional model: Use modeling software to establish a three-dimensional model between the rib placement mold and each roller in the pneumatic roller group (4); Step 3: Input material parameters: In the finite element analysis software, input the relevant material properties of the fabric to be laid; Step 4: Finite element analysis: In the finite element analysis software, based on the actual laying situation, create the contact, load and boundary conditions between the material to be laid, the laying mold and the pressure roller, and perform finite element explicit dynamic analysis on the laying process; Step 5: Optimizing the arrangement of the pressure roller mechanism: Based on the results of the finite element analysis software, determine whether there is stress concentration in the fabric to be laid. If yes, optimize the arrangement of the pressure roller mechanism and return to step 2. If no, obtain the optimal arrangement of the pressure roller mechanism and complete the arrangement of each pressure roller in the pneumatic pressure roller group (4) in the device.

10. A method for setting up a device for laying hat-shaped rib fibers according to claim 9, characterized in that: In the step 1, the relevant material properties include any one or more material properties of the rolling friction coefficient μ1 between the fabric to be laid and the pressure roller, the sliding friction coefficient μ2 between the fabric to be laid and the mold surface, the elastic modulus E and Poisson's ratio ν of the fabric to be laid.

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