Composite structure forming device

Abstract

The invention relates to the technical field of composite structure connection, in particular to a composite structure forming device which comprises a platform, a laser welding assembly and a pressing assembly. The platform comprises a machining station used for bearing a to-be-formed structure. The laser welding assembly comprises a laser device, and the laser device is used for emitting laser to the to-be-formed structure so as to achieve laser welding; the press-fit assembly comprises a press-fit body and a moving device, the moving device is connected with the press-fit body and used for driving the press-fit body to move, and press-fit force is applied to the welding position of the to-be-formed structure in the moving process of the press-fit body. Non-contact welding is carried out on the to-be-formed structure through laser welding, and mechanical pressing is carried out on the welded part through the pressing assembly. According to the technical scheme, a welding and mechanical combined forming mode is adopted, the mechanical anchoring combination effect of the to-be-formed structure can be enhanced, metallurgical combination of the mechanical interlocking effect at the connecting interface is constructed, and the mechanical property of the composite structure is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of composite structure connection, and in particular to a composite structure forming device. Background Art

[0002] Carbon fiber composite materials have many excellent properties such as low density, high specific strength, and high specific modulus, and have become a key material for lightweight design. Taking aircraft as an example, carbon fiber composite materials have been successfully applied to key components such as the vertical tail, cabin floor beams, and elevator cabins of aircraft; in practical applications, carbon fiber composite materials often replace part of metal materials, so carbon fiber composite materials must form a complete composite structure with the metal frame.

[0003] The performance of the composite structure of carbon fiber composites and metals will directly affect the quality of the product. At present, the connection methods of carbon fiber composites and metals are mainly bonding and mechanical connection. Among them, bonding has low cost, but bonding has high requirements on the material surface, long curing process, and is more sensitive to working environment conditions; mechanical connection processes such as bolt connection and riveting involve manual steps, and the production cycle and cost are relatively high. Summary of the invention

[0004] In order to solve at least the above technical problems existing in the prior art, the present invention provides a composite structure forming device.

[0005] On the one hand, the present invention provides a composite structure forming device, including a platform, a laser welding assembly and a pressing assembly; the platform includes a processing position, which is used to support the structure to be formed; the laser welding assembly includes a laser, which is used to emit laser to the structure to be formed to achieve laser welding; the pressing assembly includes a pressing body and a moving device, the moving device is connected to the pressing body and is used to drive the pressing body to move, and the pressing force is applied to the welding position of the structure to be formed during the movement of the pressing body.

[0006] In some embodiments, the laser welding assembly further includes a laser galvanometer; the laser galvanometer is used to change the laser emitted by the laser to a set position.

[0007] In some embodiments, the laser welding assembly also includes a bracket, a first lifting structure and an adapter block; the bracket is vertically arranged on the platform and is located on one side of the processing position, the first lifting structure is arranged on the bracket, the adapter block is connected to the first lifting structure, and the laser galvanometer is arranged on the adapter block; the first lifting structure is used to adjust the straight-line distance between the adapter block and the laser galvanometer and the molding structure.

[0008] In some embodiments, the first lifting structure includes a linear screw and a driving member; the linear screw is arranged along the height direction of the bracket, and the adapter block is threadedly connected to the linear screw; the driving member is arranged at the end of the linear screw, and the driving member includes a manual turntable or a driving motor.

[0009] In some embodiments, the moving device includes a linear moving module, a first guide rail and a connecting frame; the linear moving module and the first guide rail are parallel and spaced apart, the processing position is located between the linear moving module and the first guide rail, the two ends of the connecting frame are respectively connected to the linear moving module and the first guide rail, and move synchronously with the linear moving module, and the pressing body is connected to the connecting frame.

[0010] In some embodiments, the connecting frame includes an angle plate and a support plate, the angle plate includes a transverse plate and a vertical plate, the transverse plate and the vertical plate are connected via the support plate, and the pressing body is connected to the vertical plate; the linear moving module includes a first slider, a second slider is provided on the first guide rail, and the two ends of the transverse plate are fixedly connected to the first slider and the second slider respectively.

[0011] In some embodiments, the pressing assembly further includes a second lifting structure; the pressing body is connected to the vertical plate via the second lifting structure, and the second lifting structure is used to adjust the pressing force between the pressing body and the structure to be formed.

[0012] In some embodiments, the second lifting structure includes a mounting plate, a lifting cylinder, a second guide rail and a third slider; the mounting plate is connected to the vertical plate, the second guide rail is arranged in a direction perpendicular to the processing position, the third slider is slidably connected to the second guide rail, the pressing body is connected to the third slider, the lifting cylinder is arranged on the mounting plate, and the telescopic rod of the lifting cylinder is connected to the third slider.

[0013] In some embodiments, the pressing body includes an auxiliary bracket and a roller; the roller has a set width, the roller is rotatably connected to the auxiliary bracket, and the auxiliary bracket is connected to the third slider.

[0014] In some embodiments, the platform also includes a pad, a welding substrate and a welding fixture; the pad is arranged on the platform, the processing position is located on the pad, the welding substrate is arranged on the pad, the welding substrate is used to support the structure to be formed, and the welding fixture is used to clamp and fix the structure to be formed on the welding substrate.

[0015] The present invention provides a composite structure forming device, which, when in use, adopts a forming method combining laser welding and mechanical pressing, performs contactless welding of the structure to be formed by laser welding, and mechanically presses the welding part by a pressing assembly to complete the processing and forming of the structure to be formed. The technical solution of the present invention, the forming method combining welding and mechanical pressing, can enhance the mechanical anchoring effect of the structure to be formed, construct a metallurgical bond with a mechanical interlocking effect at the connection interface, and effectively improve the mechanical properties of the composite structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, in which:

[0017] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0018] Figure 1 A schematic diagram of the structure of a composite structure forming device provided by an embodiment of the present invention;

[0019] Figure 2 A schematic structural diagram of the other side of the composite structure forming device provided by an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the structure of a pressing assembly in a composite structure forming device provided by an embodiment of the present invention;

[0021] Figure 4 A partial enlarged view of the pressing body in the composite structure forming device provided by an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the structure of a connecting frame in a composite structure forming device provided by an embodiment of the present invention;

[0023] Figure 6 A schematic structural diagram of the first guide rail side in the composite structure forming device provided by an embodiment of the present invention;

[0024] Figure 7 A schematic diagram of a composite structure forming device provided in an embodiment of the present invention.

[0025] In the figure:

[0026] 10: platform; 20: laser welding assembly; 30: pressing assembly; 40: structure to be formed;

[0027] 11: processing position; 12: backing plate; 13: welding base plate; 14: welding fixture;

[0028] 21: laser galvanometer; 22: bracket; 23: first lifting structure; 24: adapter block;

[0029] 31: pressing body; 311: auxiliary bracket; 312: roller; 32: moving device; 321: linear moving module; 3211: first slider; 3212: servo motor; 322: first guide rail; 3221: second slider; 323: connecting frame; 3231: angle plate; 3232: support plate; 33: second lifting structure; 331: mounting plate; 332: lifting cylinder; 333: second guide rail; 334: third slider;

[0030] 41: Metal structure; 42: Carbon fiber composite material. DETAILED DESCRIPTION

[0031] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] In view of the technical problems existing in the prior art, laser welding can be used to form a composite structure. As a non-contact, high-energy-density connection method, laser welding has the advantages of controllable capacity and good accessibility. However, the performance of the composite structure obtained by using only a single laser welding heat source does not reach the ideal state.

[0033] The embodiment of the present invention provides a composite structure forming device, including a platform, a laser welding assembly and a pressing assembly; the laser welding assembly is used to weld the structure to be formed, and the pressing assembly is used to mechanically press the welded structure to be formed. The structure to be formed adopts a composite forming method of laser welding + mechanical pressing, which can ensure the stability of the connection.

[0034] The following describes in detail the components in the composite structure forming device provided by the embodiment of the present invention, as well as the positional relationship and connection relationship between the components, in conjunction with the accompanying drawings.

[0035] like Figures 1 to 7As shown, the platform 10 includes a processing position 11, and the processing position 11 is used to carry the structure to be formed 40. For example, the platform 10 includes support legs, and the platform 10 is supported at a certain height by the support legs. For example, the platform 10 also includes a pad 12, a welding substrate 13 and a welding fixture 14; the pad 12 is arranged on the platform 10, the processing position 11 is located on the pad 12, the welding substrate 13 is arranged on the pad 12, the structure to be formed 40 is placed on the welding substrate 13, and then the structure to be formed 40 is clamped and fixed on the welding substrate 13 by the welding fixture 14.

[0036] The structure to be formed 40 can be formed between a composite structure and a metal structure, or can be formed by connecting a non-metallic structure to a metal structure, a metal structure to a metal structure, or a non-metallic structure to a non-metallic structure, etc. For example, the non-metallic structure is a composite material such as a carbon fiber composite material, a ceramic matrix composite material, or other non-metallic materials. In the embodiment of the present invention, the connection forming of the carbon fiber composite material 42 and the metal structure 41 is used for explanation.

[0037] The structure to be formed 40 completes the composite forming operation of laser welding + mechanical pressing in the clamping state. Before the structure to be formed 40 is processed, it is also necessary to perform a pretreatment operation. Specifically: the surface of the carbon fiber composite material 42 and the metal structure 41 are pre-treated to meet the connection forming requirements.

[0038] For example, according to the material properties of the metal structure 41, mechanical polishing, sandpaper, chemical cleaning and other methods are selected for surface treatment, while the carbon fiber composite material 42 is treated by alcohol ultrasonic cleaning and oven drying; wherein the carbon fiber composite material 42 can be a carbon fiber thermosetting composite material, a carbon fiber thermoplastic composite material or other carbon fiber composite materials. Micro-nano textures of different morphologies and sizes are prepared in advance through surface treatment technology to improve the mechanical interlocking ability of the interface during welding.

[0039] For example, the structure to be formed 40 is formed by overlapping the metal structure 41 on the top and the carbon fiber composite material 42 on the bottom. Among them, materials such as resin can be added between the carbon fiber composite material 42 and the metal structure 41 to enhance the chemical bond at the connection interface after forming, and further improve the stability after connection.

[0040] Continue to refer Figures 1 to 7 As shown, in the embodiment of the present invention, when the laser welding forming operation is adopted: the laser welding assembly 20 includes a laser (not shown in the figure) and a laser galvanometer 21, the laser is used to emit a laser beam to the laser galvanometer 21, and the laser galvanometer 21 is used to change the laser emitted by the laser to a set position.

[0041] The laser galvanometer 21 adjusts the position where the laser beam is emitted according to a preset welding path, so that the laser beam can have a certain coverage area and can meet the welding operations in multiple positions.

[0042] The embodiment of the present invention is not limited to the use of the laser galvanometer 21. For example, a laser head may also be used. The laser emitted by the laser reaches the welding position through the laser head to achieve the welding operation.

[0043] The laser welding assembly 20 also includes a bracket 22, a first lifting structure 23 and an adapter block 24; the bracket 22 is vertically arranged on the platform 10 and is located on one side of the processing position 11, the first lifting structure 23 is arranged on the bracket 22, the adapter block 24 is connected to the first lifting structure 23, and the laser galvanometer 21 is arranged on the adapter block 24; the first lifting structure 23 is used to adjust the straight-line distance between the adapter block 24 and the laser galvanometer 21 and the structure to be formed 40.

[0044] For example, the distance between the laser galvanometer 21 and the structure to be formed 40 can be adjusted manually or electrically to meet the use requirements of different use scenarios; the first lifting structure 23 includes a linear screw and a driving member; the linear screw is arranged along the height direction of the bracket 22, and the adapter block 24 is threadedly connected to the linear screw; the driving member is arranged at the end of the linear screw, and the driving member includes a manual turntable or a driving motor, and the manual turntable or the driving motor is used to complete the rotation operation of the linear screw, and the lifting operation of the adapter block 24 is completed as the linear screw rotates in the forward or reverse direction. For example, when the required coverage area for the welding operation is large, the adapter block 24 can be appropriately raised.

[0045] When the adapter block 24 is moved into position, the laser galvanometer 21 is used to emit laser light to the structure to be formed 40 to achieve laser welding;

[0046] For example, a recognition system is configured at the front end of the laser galvanometer 21, and the image information of the welding position is obtained by using the recognition system. The laser emission position is adjusted according to the weld information fed back by the image information, thereby achieving high-precision weld positioning.

[0047] The laser galvanometer 21 adjusts the laser emission angle in the same manner as the existing laser galvanometer, and the embodiment of the present invention does not limit the adjustment manner of the laser galvanometer 21 .

[0048] In the embodiment of the present invention, continue to refer to Figures 1 to 7 As shown, the pressing assembly 30 includes a pressing body 31 and a moving device 32. The moving device 32 is connected to the pressing body 31 and is used to drive the pressing body 31 to move. During the movement of the pressing body 31, a pressing force is applied to the welding position of the structure 40 to be formed.

[0049] For example, the moving device 32 includes a linear moving module 321, a first guide rail 322 and a connecting frame 323; the linear moving module 321 and the first guide rail 322 are parallel and spaced apart, the processing position 11 is located between the linear moving module 321 and the first guide rail 322, the two ends of the connecting frame 323 are respectively connected to the linear moving module 321 and the first guide rail 322, and move synchronously with the linear moving module 321, and the pressing body 31 is connected to the connecting frame 323.

[0050] During the welding operation, the connecting frame 323 and the pressing body 31 are located on one side of the first guide rail 322 and the linear moving module 321, avoiding the welding position of the structure to be formed 40. The pressing operation can be carried out after the welding is completed. Alternatively, during the welding operation, the structure to be formed 40 adjacent to the pressing body 31 is welded first. After the welding operation for a certain distance, the pressing operation can be started, that is, the welding operation and the pressing operation are carried out simultaneously; or, the welding operation and the pressing operation are carried out simultaneously, with welding in front and pressing in the back, moving synchronously.

[0051] For example, the linear moving module 321 is a linear screw module, which drives the screw to rotate through the servo motor 3212, driving one end of the connecting frame 323 to move, and the other end of the connecting frame 323 moves synchronously on the first guide rail 322, thereby realizing the movement of the pressing body 31.

[0052] For example, the moving speed of the pressing body 31 ranges from 0.5 mm / s to 30 mm / s; or, for example, the pressing force of the pressing body 31 ranges from 0.1 N to 2200 N.

[0053] For example, the connecting frame 323 includes an angle plate 3231 and a support plate 3232, the angle plate 3231 includes a horizontal plate and a vertical plate, the horizontal plate and the vertical plate are connected by the support plate 3232, and the pressing body 31 is connected to the vertical plate; the linear moving module 321 includes a first slider 3211, a second slider 3221 is provided on the first guide rail 322, and the two ends of the horizontal plate are respectively fixedly connected to the first slider 3211 and the second slider 3221, for example, the first slider 3211 and the second slider 3221 are respectively connected to the horizontal plate through a fixed plate. A structurally stable connecting frame 323 can be formed by the angle plate 3231 and the support plate 3232, and a smooth moving pressing operation can be achieved for the pressing body 31.

[0054] For example, the pressing assembly 30 further includes a second lifting structure 33; the pressing body 31 is connected to the vertical plate through the second lifting structure 33, and the second lifting structure 33 is used to adjust the pressing force between the pressing body 31 and the structure to be formed 40. For example, the pressing force of the pressing body 31 is 0.1 Newton to 2200 Newtons, and the pressing force is adjusted by the second lifting structure 33. If the pressing force needs to be increased, the second lifting structure 33 is lowered to increase the force between the pressing body 31 and the structure to be formed 40. If the pressing force needs to be reduced, the second lifting structure 33 is raised in the opposite direction.

[0055] For example, the second lifting structure 33 includes a mounting plate 331, a lifting cylinder 332, a second guide rail 333 and a third slider 334; the mounting plate 331 is connected to the vertical plate, the second guide rail 333 is arranged along the direction vertical to the processing position 11, the third slider 334 is slidingly connected to the second guide rail 333, the pressing body 31 is connected to the third slider 334, the lifting cylinder 332 is arranged on the mounting plate 331, and the telescopic rod of the lifting cylinder 332 is connected to the third slider 334.

[0056] The telescopic rod of the lifting cylinder 332 is extended or shortened to adjust the height position of the second guide rail 333 on the second guide rail 333, thereby achieving height adjustment of the pressing body 31, that is, the pressing force of the pressing body 31 on the structure to be formed 40 can be adjusted.

[0057] For example, the pressing body 31 includes an auxiliary bracket 311 and a roller 312; the roller 312 has a set width, the roller 312 is rotatably connected to the auxiliary bracket 311, and the auxiliary bracket 311 is connected to the third slider 334. During the pressing operation, friction is generated between the surface of the roller 312 and the structure to be formed 40, and as the linear moving module 321 moves, the pressing body 31 is driven to roll on the surface of the structure to be formed 40 in the form of the roller 312 until the roller 312 rolls and covers the entire welding position. For example, the width of the roller 312 ranges from 2 mm to 100 mm, and the diameter of the roller 312 ranges from 30 mm to 100 mm.

[0058] At this point, the molding operation of the structure to be molded 40 is completed by laser welding and mechanical pressing. When the molded structure 40 is cooled to room temperature, the welding fixture 14 is removed and the molded structure can be taken out.

[0059] The present invention provides a composite structure forming device, which, when in use, adopts a forming method combining laser welding and mechanical pressing, performs contactless welding of a structure to be formed 40 by laser welding, and mechanically presses the welding part by a pressing assembly 30, so as to complete the processing and forming of the structure to be formed 40. The technical solution of the present invention, the forming method combining welding and mechanical pressing, can enhance the mechanical anchoring and bonding effect of the structure to be formed 40, construct a metallurgical bonding of the mechanical interlocking effect at the connection interface, and effectively improve the mechanical properties of the composite structure.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0062] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A composite structure forming device, characterized in that: It comprises a platform (10), a laser welding assembly (20) and a pressing assembly (30); The platform (10) comprises a processing position (11), and the processing position (11) is used to carry the structure to be formed (40); The laser welding assembly (20) comprises a laser, and the laser is used to emit laser light toward the structure to be formed (40) to achieve laser welding; The pressing assembly (30) comprises a pressing body (31) and a moving device (32); the moving device (32) is connected to the pressing body (31) and is used to drive the pressing body (31) to move; during the movement of the pressing body (31), a pressing force is applied to the welding position of the structure to be formed (40).

2. The composite structure forming device according to claim 1, characterized in that: The laser welding assembly (20) further comprises a laser galvanometer (21); The laser galvanometer (21) is used to change the laser emitted by the laser to a set position.

3. The composite structure forming device according to claim 2, characterized in that: The laser welding assembly (20) further comprises a bracket (22), a first lifting structure (23) and an adapter block (24); The support (22) is vertically arranged on the platform (10) and is located on one side of the processing position (11); the first lifting structure (23) is arranged on the support (22); the adapter block (24) is connected to the first lifting structure (23); and the laser galvanometer (21) is arranged on the adapter block (24); The first lifting structure (23) is used to adjust the linear distance between the adapter block (24) and the laser galvanometer (21) and the molding structure (40).

4. The composite structure forming device according to claim 3, characterized in that: The first lifting structure (23) comprises a linear screw and a driving member; The linear screw is arranged along the height direction of the bracket (22), and the adapter block (24) is threadedly connected to the linear screw; The driving member is arranged at the end of the linear screw, and the driving member includes a manual turntable or a driving motor.

5. The composite structure forming device according to claim 1, characterized in that: The moving device (32) comprises a linear moving module (321), a first guide rail (322) and a connecting frame (323); The linear motion module (321) and the first guide rail (322) are arranged in parallel and at intervals, the processing position (11) is located between the linear motion module (321) and the first guide rail (322), the two ends of the connecting frame (323) are respectively connected to the linear motion module (321) and the first guide rail (322), and move synchronously with the linear motion module (321), and the pressing body (31) is connected to the connecting frame (323).

6. The composite structure forming device according to claim 5, characterized in that: The connecting frame (323) comprises an angled plate (3231) and a support plate (3232), the angled plate (3231) comprises a transverse plate and a vertical plate, the transverse plate and the vertical plate are connected via the support plate (3232), and the pressing body (31) is connected to the vertical plate; The linear motion module (321) comprises a first slider (3211), a second slider (3221) is provided on the first guide rail (322), and two ends of the transverse plate are respectively fixedly connected to the first slider (3211) and the second slider (3221).

7. The composite structure forming device according to claim 6, characterized in that: The pressing assembly (30) further comprises a second lifting structure (33); The pressing body (31) is connected to the vertical plate via the second lifting structure (33), and the second lifting structure (33) is used to adjust the pressing force between the pressing body (31) and the structure to be formed (40).

8. The composite structure forming device according to claim 7, characterized in that: The second lifting structure (33) comprises a mounting plate (331), a lifting cylinder (332), a second guide rail (333) and a third sliding block (334); The mounting plate (331) is connected to the vertical plate, the second guide rail (333) is arranged in a direction perpendicular to the processing position (11), the third slider (334) is slidably connected to the second guide rail (333), the pressing body (31) is connected to the third slider (334), the lifting cylinder (332) is arranged on the mounting plate (331), and the telescopic rod of the lifting cylinder (332) is connected to the third slider (334).

9. The composite structure forming device according to claim 8, characterized in that: The pressing body (31) comprises an auxiliary bracket (311) and a roller (312); The roller (312) has a set width, the roller (312) is rotatably connected to the auxiliary bracket (311), and the auxiliary bracket (311) is connected to the third sliding block (334).

10. The composite structure forming device according to any one of claims 1 to 9, characterized in that: The platform (10) further comprises a backing plate (12), a welding base plate (13) and a welding fixture (14); The pad (12) is arranged on the platform (10), the processing position (11) is located on the pad (12), the welding substrate (13) is arranged on the pad (12), the welding substrate (13) is used to support the structure to be formed (40), and the welding fixture (14) is used to clamp and fix the structure to be formed (40) on the welding substrate (13).

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