Paving device for automatic fiber placement of carbon fiber composite material

Abstract

The utility model relates to the technical field of automatic fiber placement of carbon fiber composite materials, in particular to a placement device for automatic fiber placement of carbon fiber composite materials, which comprises a working machine base, a portal frame, a four-axis mechanical arm and a fiber placement machine head, a plurality of supporting columns are mounted at the bottom of the working machine base, and a conveying alignment mechanism is arranged on the working machine base; the conveying alignment mechanism comprises a motor installed on the side portion of the working machine base, a groove is formed in the top of the working machine base, a plurality of driving shafts are rotationally installed on the opposite inner walls of the groove, one end of one driving shaft is installed on an output shaft of the motor, and the driving shafts are installed in a matched mode through a transmission assembly. Conveying rollers are fixedly arranged on the multiple driving shafts, and two L-shaped blocks are symmetrically arranged above the working machine base. According to the utility model, the processed object can be pushed through the extrusion block during conveying, so that the processed object can be aligned to the middle position without back-and-forth adjustment.

Description

Technical Field

[0001] This utility model relates to the field of automatic fiber placement technology for carbon fiber composite materials, and specifically to a fiber placement device for automatic fiber placement of carbon fiber composite materials. Background Technology

[0002] Carbon fiber composites have advantages such as high specific strength, high specific modulus, fatigue resistance, and corrosion resistance. They can reduce product weight and improve performance, and are widely used in aerospace, automotive and shipbuilding, wind power generation, medical devices, sporting goods and other fields. In the process of laying up fiber composites, automatic fiber placement equipment is required. Automatic fiber placement equipment is a key piece of equipment for composite material molding and manufacturing. Its working principle mainly relies on the cooperation of CNC robotic arms and fiber placement heads.

[0003] The prior art patent CN116922818B discloses a fiber placement machine for aerospace composite materials. It avoids angular interference between the input and output ends on the placement plane and reduces the filament pulling caused by the turning of the machine head by using a work base, a mounting table, a gantry frame, a four-axis robotic arm, a fiber placement head, a fiber output assembly, a fiber placement assembly, and a placement auxiliary assembly. However, in actual use, the workpiece needs to be lifted to the workpiece by an external crane. In the actual processing, it is inconvenient to transport and adjust the workpiece. Moreover, when placing the workpiece, it is often necessary to repeatedly adjust its position to align it with the center position for processing. The back-and-forth adjustment is too cumbersome and easily affects work efficiency, making it inconvenient to use. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a placement device for automatic fiber placement of carbon fiber composite materials. This device solves the issues of inconvenience in conveying and adjusting the workpiece, the need to repeatedly adjust its position to align it with the center position during placement, the excessive back-and-forth adjustments that affect work efficiency, and the inconvenience of use.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A placement device for automatic fiber placement of carbon fiber composite materials includes a work base, a gantry frame, a four-axis robotic arm, and a fiber placement head. The bottom of the work base is equipped with multiple support columns, and the work base is provided with a conveying and alignment mechanism.

[0007] The conveying and alignment mechanism includes a motor mounted on the side of the working base. A groove is provided on the top of the working base. Multiple drive shafts are rotatably mounted on the inner walls of the groove. One end of one of the drive shafts is mounted on the output shaft of the motor. The multiple drive shafts are installed in cooperation with a transmission assembly. Conveying rollers are fixed on each of the multiple drive shafts. Two L-shaped blocks are symmetrically arranged above the working base. Pressure sensors are installed on the sides of the two L-shaped blocks. Slide grooves are provided on the top of the two L-shaped blocks. Two fixed columns are installed on the inner walls of the two slide grooves. L-shaped sliding plates are slidably sleeved on the two fixed columns. Extrusion blocks are installed on the sides of the two L-shaped sliding plates. Pressure sensors are located between the extrusion blocks and the L-shaped blocks. The two L-shaped blocks can be linked with one of the drive shafts through a driven limiting assembly.

[0008] The driven limiting assembly includes through holes on both sides of the end of the working base. Two through holes are respectively passed through the two ends of one of the drive shafts, which are far apart from each other, and reciprocating threaded rods are respectively installed on them. Moving frames are threaded on both of the reciprocating threaded rods. Guide rods are respectively installed on both sides of the end of the working base. Guide holes adapted to the guide rods are respectively opened on the sides of the two moving frames. The two L-shaped blocks are respectively installed in cooperation with the two moving frames through moving limiting units.

[0009] The moving limiting unit includes two sliding rods respectively installed on the inner walls of the two moving frames. The two L-shaped blocks are slidably sleeved on the two sliding rods located on the same side. A fixing block is installed on the side of the working base. An electric push rod is installed at the bottom of the fixing block. A lifting plate is installed at the output end of the electric push rod. A lifting frame is installed on the side of the lifting plate. A fixing rod is installed on the inner wall of the lifting frame. Two lifting blocks are slidably sleeved on the fixing rod. Each of the two L-shaped blocks has a lifting cavity. A moving plate is movably arranged in each of the two lifting cavities. A locking block is installed at the bottom of each of the two moving plates. The bottom of the two moving frames and the bottom of the two L-shaped blocks are respectively provided with locking holes and moving holes that are adapted to the lifting blocks and locking blocks. An elastic unit is provided on the side of the L-shaped block.

[0010] The elastic unit includes a spring installed on the side of the L-shaped block, and the other end of the spring is installed on the inner side wall of the movable frame.

[0011] Both of the extrusion blocks are fitted with soft pads on their sides, and the bottoms of the multiple support columns are fitted with cushioning pads.

[0012] The transmission assembly includes a drive cavity formed on the working base. The inner side wall of the groove and the relative inner walls of the multiple drive cavities are respectively provided with clearance holes adapted to the drive shaft. A first sprocket and a second sprocket are respectively sleeved on the multiple drive shafts. A chain is installed in each pair of adapted first sprockets and second sprockets.

[0013] A collection box is movably disposed within the groove, and multiple scrapers adapted to the conveying roller are installed on the opposite inner walls of the groove.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention enables multiple conveying rollers to rotate via a motor, a first sprocket, a second sprocket, a chain, and a drive shaft, thereby conveying and adjusting the workpiece. Simultaneously, the rotation of the drive shaft causes two L-shaped blocks to move back and forth via a reciprocating threaded rod and a moving frame. This movement of the two L-shaped blocks drives the pressing block to move back and forth, thus pushing the workpiece during conveying. This eliminates the need for constant back-and-forth adjustments, allowing the workpiece to be aligned to the center position. Furthermore, an electric push rod, a lifting block, and a locking block control whether the L-shaped blocks move with the moving frame, preventing excessive force that could damage the L-shaped blocks, pressing block, and pressure sensor. It also allows for alignment operations on workpieces of different sizes.

[0016] This invention uses a scraper to easily scrape the surface of the conveyor roller, preventing debris from adhering to the roller surface and affecting subsequent conveying. The collection box facilitates the collection of the scraped debris.

[0017] This invention uses a spring to facilitate the reset of the locking block, thereby limiting the L-shaped block again and preventing it from affecting subsequent alignment operations. Attached Figure Description

[0018] Figure 1 This is a first-view three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the second-view three-dimensional structure of this utility model;

[0020] Figure 3 This is a partial structural schematic diagram of the present invention. Figure 1 (Partial section);

[0021] Figure 4 This is a partial structural schematic diagram of the present invention. Figure 2 (Partial section);

[0022] Figure 5 This is a partial structural schematic diagram of the present invention. Figure 3 (Partial section);

[0023] Figure 6 yes Figure 5 Enlarged structural diagram at point A in the middle.

[0024] Reference numerals: 1. Working base; 2. Motor; 3. Gantry frame; 4. Conveying roller; 5. Moving frame; 6. L-shaped block; 7. Extrusion block; 8. Reciprocating threaded rod; 9. Lifting frame; 10. Lifting block; 11. Drive shaft; 12. Pressure sensor; 13. Fixed block; 14. Electric push rod; 15. Lifting plate; 16. Locking block; 17. Spring; 18. First sprocket; 19. Second sprocket; 20. Chain; 21. Collection box; 22. Scraper; 23. Locking hole; 24. Moving hole; 25. Lifting chamber. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0026] Figures 1-6 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figure 1 ~Attached Figure 6 The present invention will be further described below.

[0027] A placement device for automatic fiber placement of carbon fiber composite materials includes a work base 1, a gantry frame 3, a four-axis robotic arm, and a fiber placement head. It should be noted that, in this embodiment, the installation method and usage method of the work base 1, the gantry frame 3, the four-axis robotic arm, and the fiber placement head can refer to the prior art. Specifically, the technical content adopted in the aerospace composite material fiber placement machine tool disclosed in Chinese Patent Publication No. CN116922818B can be referred to, and will not be elaborated here.

[0028] The bottom of the working base 1 is equipped with multiple support columns, and the working base 1 is provided with a conveying alignment mechanism. The conveying alignment mechanism includes a motor 2 installed on the side of the working base 1. The top of the working base 1 is provided with a groove, and multiple drive shafts 11 are rotatably installed on the relative inner walls of the groove. One end of one of the drive shafts 11 is installed on the output shaft of the motor 2. The multiple drive shafts 11 are installed in cooperation through a transmission assembly. Conveying rollers 4 are fixed on each of the multiple drive shafts 11. Two L-shaped blocks 6 are symmetrically arranged above the working base 1. Pressure sensors 12 are installed on the sides of the two L-shaped blocks 6. The top of the two L-shaped blocks 6 is provided with a sliding groove. Two fixed columns are installed on the relative inner walls of the two sliding grooves. L-shaped sliding plates are slidably sleeved on the two fixed columns. Extrusion blocks 7 are installed on the sides of the two L-shaped sliding plates. The pressure sensors 12 are located between the extrusion blocks 7 and the L-shaped blocks 6. The two L-shaped blocks 6 can be linked with one of the drive shafts 11 through a driven limiting assembly.

[0029] The driven limiting assembly includes through holes on both sides of the end of the working base 1. Two of the drive shafts 11, which are far apart from each other, pass through the two through holes and are respectively equipped with reciprocating threaded rods 8. Each of the two reciprocating threaded rods 8 is threaded with a movable frame 5. Guide rods are respectively installed on both sides of the end of the working base 1. Guide holes adapted to the guide rods are respectively opened on the sides of the two movable frames 5. The two L-shaped blocks 6 are respectively installed in cooperation with the two movable frames 5 through the movable limiting unit.

[0030] In the above structure, the motor 2 and the transmission assembly enable multiple drive shafts 11 to rotate. The rotation of the multiple drive shafts 11 causes multiple conveying rollers 4 to rotate, thereby conveying and adjusting the workpiece. At the same time, the rotation of the drive shafts 11 causes two L-shaped blocks 6 to move back and forth through the driven limiting assembly. The back and forth movement of the L-shaped blocks 6 causes the L-shaped slide plate to move back and forth through the fixed column. The back and forth movement of the L-shaped slide plate causes the pressing block 7 to move back and forth, thereby pushing the sides of the workpiece during conveying. Thus, the workpiece can be aligned with the center position without the need for back and forth adjustment. At the same time, when the pressure sensor 12 detects that the pressure exceeds the set value, the moving limiting unit will prevent the L-shaped blocks 6 from moving towards the workpiece with the moving frame 5, thereby avoiding excessive force that could damage the L-shaped blocks 6, the pressing block 7, and the pressure sensor 12. It can also perform alignment operations on workpieces of different sizes.

[0031] The moving limiting unit includes two sliding rods respectively installed on the inner walls of the two moving frames 5. The two L-shaped blocks 6 are slidably sleeved on the two sliding rods located on the same side. A fixing block 13 is installed on the side of the working base 1. An electric push rod 14 is installed at the bottom of the fixing block 13. A lifting plate 15 is installed at the output end of the electric push rod 14. A lifting frame 9 is installed on the side of the lifting plate 15. A fixing rod is installed on the inner wall of the lifting frame 9. Two lifting blocks 10 are slidably sleeved on the fixing rod. A lifting cavity 25 is opened on each of the two L-shaped blocks 6. A moving plate is movably arranged in each of the two lifting cavities 25. A locking block 16 is installed at the bottom of each of the two moving plates. The bottom of the two moving frames 5 and the bottom of the two L-shaped blocks 6 are respectively provided with locking holes 23 and moving holes 24 that are adapted to the lifting blocks 10 and the locking blocks 16. An elastic unit is provided on the side of the L-shaped block 6.

[0032] In the above structure, the arrangement of the lifting frame 9, lifting block 10, slide rod, fixing block 13, electric push rod 14, lifting plate 15, moving plate, and locking block 16 facilitates the limiting or releasing of the L-shaped block 6. Specifically, by limiting and releasing the L-shaped block 6, it can be moved with the moving frame 5 or not move with it, thereby avoiding excessive force that could damage the L-shaped block 6, the pressing block 7, and the pressure sensor 12, thus enabling the alignment of workpieces of different sizes.

[0033] The elastic unit includes a spring 17 installed on the side of the L-shaped block 6, and the other end of the spring 17 is installed on the inner side wall of the movable frame 5.

[0034] In the above structure, the spring 17 facilitates the L-shaped block 6 to reset after avoiding the obstacle.

[0035] Both of the extrusion blocks 7 have soft pads installed on their sides, and the bottoms of the multiple support columns are all equipped with buffer pads.

[0036] In the above structure, the soft pad can protect the workpiece and prevent the extrusion block 7 from directly contacting the workpiece and causing surface damage. The buffer pad can also buffer the impact of vibration.

[0037] The transmission assembly includes a drive cavity formed on the working base 1. The inner side wall of the groove and the relative inner walls of the multiple drive cavities are respectively provided with clearance holes adapted to the drive shaft 11. A first sprocket 18 and a second sprocket 19 are respectively sleeved on the multiple drive shafts 11. A chain 20 is meshed on every two adapted first sprockets 18 and second sprockets 19.

[0038] In the above structure, the arrangement of the first sprocket 18, the second sprocket 19, and the chain 20 enables multiple drive shafts 11 to rotate synchronously. Specifically, the simultaneous rotation of multiple drive shafts 11 facilitates the synchronous rotation of the conveyor roller 4, thereby conveying the workpiece.

[0039] A collection box 21 is movably disposed within the groove, and multiple scrapers 22 adapted to the conveying roller 4 are installed on the opposite inner walls of the groove.

[0040] In the above structure, the collection box 21 and the scraper 22 facilitate the cleaning and collection of the lower surface of the conveying roller 4.

[0041] In summary: When using this utility model, the workpiece to be laid is first placed on the conveyor roller 4 by an external crane or manually. Taking a rectangular plate as an example, the motor 2 is then started. The output of the motor 2 will cause one of the drive shafts 11 to rotate. The rotation of the drive shaft 11 will cause multiple drive shafts 11 to rotate simultaneously through the transmission of the multi-stage first sprocket 18, second sprocket 19 and chain 20. The rotation of the drive shaft 11 will cause the conveyor roller 4 to rotate, and the rotation of the conveyor roller 4 will cause the workpiece to move.

[0042] When the position of the extrusion block 7 coincides with the direction of movement of the workpiece, the workpiece will be blocked and unable to move. At the same time, the rotation of the drive shaft 11 will cause the reciprocating threaded rod 8 to rotate. Under the action of the guide rod, the rotation of the reciprocating threaded rod 8 will cause the two moving frames 5 to move closer or further apart. At this time, since the clamping block 16 is in the clamping hole 23, the movement of the moving frame 5 will drive the L-shaped block 6 to move back and forth. At the same time, the back and forth movement of the L-shaped block 6 will cause the extrusion block 7 to move back and forth through the fixed column and the L-shaped sliding plate. When the two extrusion blocks 7 move away from each other and do not coincide with the direction of movement of the workpiece, the workpiece will move towards the direction of the filament placement machine head again. After that, when the two extrusion blocks 7 move closer to each other, the two extrusion blocks 7 will squeeze the workpiece and push it towards the middle position. Thus, without the need for back and forth adjustment, the workpiece can be aligned with the middle position. After alignment, the conveying roller 4 continues to rotate and convey. When the workpiece is below the gantry 3, the four-axis robotic arm and the filament placement machine head will perform the filament placement operation on the workpiece.

[0043] During alignment, pressure sensor 12 monitors the force between the extrusion block 7 and the workpiece. When the pressure detected by pressure sensor 12 exceeds the set value, electric push rod 14 retracts. The retraction of electric push rod 14 causes lifting plate 15 to move upward, which in turn causes lifting frame 9 to move upward. The upward movement of lifting frame 9 causes lifting block 10 to move upward via fixing rod. The upward movement of lifting block 10 presses against locking block 16, causing it to move upward. When locking block 16 moves out of locking hole 23, L-shaped block 6 is released from its limit. At this time, moving frame 5 continues to approach work base 1, while L-shaped block 6 remains stationary. The moving frame 5 generates a relative displacement, which causes the extrusion block 7 to stop applying pressure to the workpiece, thereby avoiding excessive force that could damage the L-shaped block 6, the extrusion block 7, and the pressure sensor 12. When the moving frame 5 moves in the reverse direction, the electric push rod 14 is activated again to reset. At the same time, the L-shaped block 6 is reset and moved by the action of the spring 17. When the L-shaped block 6 is fully reset, the locking block 16 is aligned with the locking hole 23. Then, the locking block 16 enters the locking hole 23 under the action of gravity, thereby limiting the L-shaped block 6 and facilitating subsequent alignment operations.

Claims

1. A placement device for automated fiber placement of carbon fiber composite materials, comprising a work base (1), a gantry frame (3), a four-axis robotic arm, and a fiber placement head, characterized in that, The bottom of the working base (1) is equipped with multiple support columns, and the working base (1) is provided with a conveying alignment mechanism; The conveying and alignment mechanism includes a motor (2) installed on the side of the working base (1). The top of the working base (1) has a groove, and multiple drive shafts (11) are rotatably mounted on the inner wall of the groove. One end of one of the drive shafts (11) is mounted on the output shaft of the motor (2). The multiple drive shafts (11) are installed in cooperation through a transmission assembly. Conveying rollers (4) are fixed on each of the multiple drive shafts (11). Two L-shaped blocks (6) are symmetrically arranged above the working base (1). Pressure sensors (12) are installed on the side of each L-shaped block (6). Slide grooves are opened on the top of each L-shaped block (6). Two fixed columns are installed on the inner walls of the two slide grooves. L-shaped slide plates are slidably sleeved on the two fixed columns. Extrusion blocks (7) are installed on the side of each L-shaped slide plate. Pressure sensors (12) are located between the extrusion blocks (7) and the L-shaped blocks (6). The two L-shaped blocks (6) can be linked with one of the drive shafts (11) through the driven limiting components. The driven limiting assembly includes through holes on both sides of the end of the working base (1). Two through holes are respectively passed through the two ends of one of the drive shafts (11) that are far apart from each other, and reciprocating threaded rods (8) are respectively installed on them. Moving frames (5) are threaded on both of the two reciprocating threaded rods (8). Guide rods are respectively installed on both sides of the end of the working base (1). Guide holes adapted to the guide rods are respectively opened on the sides of the two moving frames (5). The two L-shaped blocks (6) are respectively installed in cooperation with the two moving frames (5) through the moving limiting unit.

2. The layup device for automatic fiber placement of carbon fiber composite materials according to claim 1, characterized in that, The moving limiting unit includes two sliding rods respectively installed on the inner walls of the two moving frames (5). The two L-shaped blocks (6) are slidably sleeved on the two sliding rods located on the same side. A fixing block (13) is installed on the side of the working base (1). An electric push rod (14) is installed at the bottom of the fixing block (13). A lifting plate (15) is installed at the output end of the electric push rod (14). A lifting frame (9) is installed on the side of the lifting plate (15). A fixing rod is installed on the inner wall of the lifting frame (9). Two lifting blocks (10) are slidably sleeved on the fixed rod. Lifting cavities (25) are opened on both L-shaped blocks (6). Movable plates are movably arranged in both lifting cavities (25). Card blocks (16) are installed at the bottom of both movable plates. Card holes (23) and moving holes (24) that are adapted to the lifting blocks (10) and card blocks (16) are opened at the bottom of the two movable frames (5) and the bottom of the two L-shaped blocks (6), respectively. Elastic units are provided on the side of the L-shaped blocks (6).

3. The layup device for automatic fiber placement of carbon fiber composite materials according to claim 2, characterized in that, The elastic unit includes a spring (17) installed on the side of the L-shaped block (6), and the other end of the spring (17) is installed on the inner side wall of the movable frame (5).

4. The layup device for automatic fiber placement of carbon fiber composite materials according to claim 1, characterized in that, Both of the extrusion blocks (7) are fitted with soft pads on their sides, and the bottoms of the multiple support columns are fitted with buffer pads.

5. The layup device for automatic fiber placement of carbon fiber composite materials according to claim 1, characterized in that, The transmission assembly includes a drive cavity opened on the working base (1). The inner side wall of the groove and the relative inner walls of the multiple drive cavities are respectively provided with clearance holes adapted to the drive shaft (11). A first sprocket (18) and a second sprocket (19) are respectively sleeved on the multiple drive shafts (11). A chain (20) is meshed on every two adapted first sprockets (18) and second sprockets (19).

6. The layup device for automatic fiber placement of carbon fiber composite materials according to claim 1, characterized in that, A collection box (21) is movably disposed in the groove, and a plurality of scrapers (22) adapted to the conveying roller (4) are installed on the opposite inner wall of the groove.

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