CN114274507A - Curved surface forming and in-situ shape modifying method for large carbon fiber composite antenna - Google Patents
Curved surface forming and in-situ shape modifying method for large carbon fiber composite antenna Download PDFInfo
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- CN114274507A CN114274507A CN202111601844.8A CN202111601844A CN114274507A CN 114274507 A CN114274507 A CN 114274507A CN 202111601844 A CN202111601844 A CN 202111601844A CN 114274507 A CN114274507 A CN 114274507A
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Abstract
The invention provides a method for forming a curved surface and in-situ modifying a large-scale carbon fiber composite antenna. Placing a mould on a workbench, inputting a large carbon fiber composite antenna curved surface structure model at a control center, setting processing parameters, and starting a laser beam gun to print an antenna blank structure along a preset model track; the image acquisition device acquires the structural data of the antenna blank and transmits the acquired data information back to the control center; the control center compares the data of the relevant parts of the preset antenna model, detects and calculates the precision and difference of the formed outline of the control center, and the detection result is transmitted back to the control system by the feedback system; after receiving the feedback information, the control system adjusts and starts a self-shaping program according to a preset antenna model structure, and controls the shaping device to finish in-situ shaping of an antenna blank structure; the invention avoids secondary damage and errors caused by clamping when the defects are repaired, reduces the processing procedures and shortens the processing period.
Description
Technical Field
The invention relates to the field of machine manufacturing, in particular to a method for forming a curved surface and modifying a shape in situ of a large-scale carbon fiber composite antenna.
Background
The antenna device is a parabolic curved surface-shaped high-performance part, has excellent physical and chemical properties such as high precision and high stability, and is widely applied to the fields of aviation, aerospace, military industry, national defense and the like. Large-scale antennas generally require high form and position accuracy, strength and mechanical properties, and general materials are difficult to meet the manufacturing requirements. Due to the characteristics of high specific strength, high specific modulus, light weight, stable chemical properties and the like, the carbon fiber composite material is successfully used for manufacturing a large parabolic curved antenna with high performance, high stability and light weight by a material increasing and decreasing technology.
The guarantee of strict form and position precision is the basis for realizing higher working precision and stability of the antenna. Due to the large size of the curved surface of the large-sized carbon fiber composite material antenna, the precise outline size of the curved surface is difficult to ensure in the manufacturing process. Generally, after the antenna curved surface is processed, a series of detections are needed, and when the antenna curved surface has shape and position defects such as bulges or depressions, the antenna curved surface needs to be moved to polishing and grinding equipment to perform complex shape correction work such as integral polishing or milling, and the carbon fiber composite material has high strength, stable chemical properties, high processing difficulty, complex procedures, low processing efficiency, high processing cost and the like.
Disclosure of Invention
According to the technical problems, the curved surface forming and in-situ modification method for the large-scale carbon fiber composite antenna integrating one-step forming processing and precise modification is provided, when the method is used for additive manufacturing of the curved surface of the antenna, the profile precision of the curved surface of the antenna can be detected in situ, unqualified parts of the curved surface of the antenna can be immediately modified, the antenna modification procedure can be obviously simplified, the processing efficiency is improved, the processing period is shortened, the processing cost is reduced, and meanwhile, the high-precision processing of the curved surface of the large-scale carbon fiber composite antenna is realized. The technical means adopted by the invention are as follows:
a large-scale carbon fiber composite antenna curved surface forming and in-situ shape modification method comprises the following steps:
step 1, placing a mould on a workbench, inputting a large-scale carbon fiber composite antenna curved surface structure model at a control center, setting processing parameters, and starting a laser beam gun to print an antenna blank structure along a preset model track;
step 4, after receiving the feedback information, the control system adjusts and starts a self-shaping program according to a preset antenna model structure, and controls the shaping device to finish in-situ shaping of the antenna blank structure;
and 5, repeating the steps 2-4 continuously until the curved surface profile of the antenna reaches the required precision, and finishing the processing.
Furthermore, the shape correction device in the step 4 comprises a diamond grinding wheel, a laser beam gun and a material feeding mechanism which are arranged on the rack, wherein the diamond grinding wheel and a grinding wheel shaft are fixedly connected and vertical to the top of the machining center, and the grinding wheel shaft is telescopic, can be linked with a transverse shaft and a longitudinal shaft and is used for material reduction and shape correction of the convex defect of the curved surface of the antenna; the laser beam gun is vertical to the top of the machining center, can be linked with a transverse shaft and a longitudinal shaft and is used for additive printing and modification of the curved surface of the antenna; the material feeding mechanism is fixedly connected with the laser beam gun, and the motion track of the material feeding mechanism is synchronous with the laser beam gun and is used for conveying the carbon fiber composite material processed on the curved surface of the strip-shaped antenna.
Furthermore, the mold consists of a cooling liquid channel and a base body and is fixed on the workbench, and the cooling liquid is continuously introduced into the channel by the mold in the machining process.
Further, the step 1 further includes the following steps: and starting the lighting devices, wherein the lighting devices are distributed at four corners at the top of the machining center, so that the lamplight brightness in the machining process is ensured.
Furthermore, the image acquisition device is three cameras which are 120 degrees and are arranged at the top of the processing center, and is used for acquiring the forming profile data of the curved surface of the antenna in an omnibearing and real-time manner.
According to the method for detecting and modifying the antenna curved surface in situ after the antenna curved surface is formed, when the antenna curved surface is formed, the profile forming precision is immediately detected in situ, the forming defect is immediately found and the defect is modified in situ, the complex work that the defect is detected by moving to a detection device after the traditional processing is completely finished and then moving to a modifying device for modifying the shape is avoided, the secondary damage and the error caused by clamping when the defect is modified are also avoided, the processing procedures are reduced, the processing period is shortened, and the high-precision forming processing of the curved surface structure of the large carbon fiber composite antenna is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the inside of a large carbon fiber composite antenna curved surface forming and in-situ shape modification machining center.
Fig. 2 is a schematic view of a control center for curved surface forming and in-situ shape modification of a large-scale carbon fiber composite antenna.
Fig. 3 is a schematic diagram of a special mold for curved surface forming and in-situ shape modification of a large-scale carbon fiber composite antenna.
In the figure: 1. a work table; 2. a large carbon fiber composite antenna curved surface; 3. a special mold; 3-1, cooling liquid channel; 3-2, a substrate; 4. a frame; 5. a machining center; 6. an illumination device; 7. an image acquisition device; 8. a diamond grinding wheel; 9. a grinding wheel spindle; 10. a laser beam gun; 11. a material feeding mechanism; 12. a guide rail; 13. and a control center.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, in the embodiment of the present invention, a method for forming a curved surface and in-situ modifying a large-scale carbon fiber composite antenna is disclosed, in the embodiment, an aspheric thin-walled carbon fiber composite antenna with a diameter of 1.8m is taken as an example, the antenna is in a "bowl" shaped parabolic curved surface structure, and a manufactured material is a strip-shaped carbon fiber composite material with high specific strength, high specific modulus and light weight. The processing equipment involved in the method comprises a processing center 5 and a control center 13 which are arranged on a frame 4.
The machining center 5 is provided with a worktable 1, a special die 3, a lighting device 6, an image acquisition device 7, a diamond grinding wheel 8, a grinding wheel shaft 9, a laser beam gun 10 and a material feeding mechanism 11. The diamond grinding wheel 8 and the grinding wheel shaft 9 are fixedly connected and vertical to the top of the machining center 5, the grinding wheel shaft 9 can stretch, can move on the guide rail 12 and can be linked with the longitudinal shaft in a transverse mode, and the diamond grinding wheel and the grinding wheel shaft are used for material reduction and shape correction of the convex defect of the antenna curved surface 2; the laser beam gun 10 is vertical to the top of the machining center 5, can move on a guide rail 12, can be linked with a transverse shaft and a longitudinal shaft, and is used for additive printing and shape modification of the antenna curved surface 2; the material feeding mechanism 11 is fixedly connected with the laser beam gun 10, and the motion track of the material feeding mechanism is synchronous with the laser beam gun 10 and is used for conveying the carbon fiber composite material processed on the strip-shaped antenna curved surface 2; printing and manufacturing the antenna curved surface 2 on the workbench 1; the special mold 3 consists of a cooling liquid channel 3-1 and a base body 3-2, is fixed on the workbench 1 and is used for forming and fixing the antenna curved surface 2 and cooling at high temperature; the lighting devices 6 are distributed at four corners at the top of the machining center 5, so that the light brightness in the machining process is ensured; the image acquisition devices 7 are three cameras which are 120 degrees and are arranged at the top of the processing center 5, and are used for acquiring the forming profile data of the antenna curved surface 2 in an all-dimensional and real-time manner and transmitting the data to the control center.
The control center device 13 includes an image processing system, a feedback system, and a control system. The control center receives the forming information of the antenna curved surface 2 from the image acquisition device, the image processing system is used for detecting and calculating the type and the numerical value of the shape and position defect formed by the antenna curved surface 2, the detection result is transmitted to the control system by the feedback system, and the control system adjusts and starts a self-trimming program to trim the defect of the workpiece.
In this embodiment, a method for forming a curved surface and in-situ modifying a large-sized carbon fiber composite antenna includes the following steps:
step 1, placing a mould on a workbench, inputting a preset large carbon fiber composite antenna curved surface 2 structural model at a control center, setting laser beam processing technological parameters, starting an illuminating device 6, starting an image acquisition device 7 and the control center 13, starting a material feeding mechanism 11, and starting a laser beam gun 10 to print a carbon fiber composite antenna curved surface 2 blank on a special mould 3 along a preset model track. The special mould 3 for the printing process continuously leads cooling liquid into the channel 3-1;
step 4, after receiving the feedback information, the control system adjusts and starts a self-shaping program according to a preset antenna model structure, and controls the shaping device to finish in-situ shaping of the antenna blank structure;
specifically, when the control system obtains feedback information that the relevant part of the antenna curved surface 2 blank is a convex defect, the control system adjusts and starts a material reducing and shape modifying program, and the diamond grinding wheel shaft 9 moves to the position above the convex defect through the guide rail 12 and extends, so that the diamond grinding wheel 8 is in contact with the antenna curved surface 2 blank and starts to grind and polish to eliminate the convex defect of the antenna curved surface 2 blank; when the control system obtains feedback information that the relevant part of the antenna curved surface 2 blank is a concave defect, the material adding and shape modifying program is adjusted and started, the laser beam gun 10 moves to the convex defect part through the guide rail 12, meanwhile, the material conveying mechanism 11 starts to convey the carbon fiber composite material, the laser beam gun 10 sprays high-energy laser heat to melt the conveyed material on the concave part of the antenna curved surface 2 blank to make up the concave shape and position defect of the antenna curved surface 2, and then the diamond grinding wheel carries out grinding and polishing and shape modification on the concave compensated excessive outline until the structure of the antenna curved surface 2 reaches the required outline precision.
And 5, repeating the steps 2-4 continuously until the curved surface profile of the antenna reaches the required precision, and finishing the processing.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. A large-scale carbon fiber composite antenna curved surface forming and in-situ shape modification method is characterized by comprising the following steps:
step 1, placing a mould on a workbench, inputting a large-scale carbon fiber composite antenna curved surface structure model at a control center, setting processing parameters, and starting a laser beam gun to print an antenna blank structure along a preset model track;
step 2, after the blank printing of the curved surface of the large-scale carbon fiber composite antenna is finished, the image acquisition device acquires structural data of the antenna blank and transmits the acquired data information back to the control center;
step 3, after receiving data information of the antenna blank structure, an image processing system of the control center compares the data information with data of a relevant part of a preset antenna model, detects and calculates the forming contour precision and difference of the data information, and the detection result is sent back to the control system by a feedback system;
step 4, after receiving the feedback information, the control system adjusts and starts a self-shaping program according to a preset antenna model structure, and controls the shaping device to finish in-situ shaping of the antenna blank structure;
and 5, repeating the steps 2-4 continuously until the curved surface profile of the antenna reaches the required precision, and finishing the processing.
2. The method for forming the curved surface and in-situ shape correction of the large-scale carbon fiber composite antenna according to claim 1, wherein the shape correction device in the step 4 comprises a diamond grinding wheel, a laser beam gun and a material feeding mechanism which are arranged on a rack, the diamond grinding wheel and a grinding wheel shaft are fixedly connected and perpendicular to the top of a machining center, the grinding wheel shaft is telescopic and can be linked with a transverse shaft and a longitudinal shaft, and the method is used for material reduction and shape correction of the convex defect of the curved surface of the antenna; the laser beam gun is vertical to the top of the machining center, can be linked with a transverse shaft and a longitudinal shaft and is used for additive printing and modification of the curved surface of the antenna; the material feeding mechanism is fixedly connected with the laser beam gun, and the motion track of the material feeding mechanism is synchronous with the laser beam gun and is used for conveying the carbon fiber composite material processed on the curved surface of the strip-shaped antenna.
3. The method for forming the curved surface and modifying the shape of the large-scale carbon fiber composite antenna in situ according to claim 1, wherein the mold comprises a cooling liquid channel and a substrate, the mold is fixed on a workbench, and the cooling liquid is continuously introduced into the channel during the processing process.
4. The method for forming the curved surface and modifying the shape of the large-scale carbon fiber composite antenna in situ according to claim 1 or 2, wherein the step 1 further comprises the following steps: and starting the lighting devices, wherein the lighting devices are distributed at four corners at the top of the machining center, so that the lamplight brightness in the machining process is ensured.
5. The method for forming the curved surface and modifying the shape of the large-scale carbon fiber composite antenna in situ according to claim 1 or 2, wherein the image acquisition devices are three cameras which are 120 degrees and are arranged at the top of the processing center, and are used for acquiring the forming profile data of the curved surface of the antenna in all directions in real time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111601844.8A CN114274507B (en) | 2021-12-24 | 2021-12-24 | Curved surface forming and in-situ shape modifying method for large carbon fiber composite antenna |
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| CN202111601844.8A CN114274507B (en) | 2021-12-24 | 2021-12-24 | Curved surface forming and in-situ shape modifying method for large carbon fiber composite antenna |
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| CN114274507B CN114274507B (en) | 2023-03-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118061538A (en) * | 2024-04-22 | 2024-05-24 | 成都贝高贝实业有限责任公司 | 3D printing-based stamping forming equipment and forming method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106425490A (en) * | 2016-09-05 | 2017-02-22 | 华中科技大学 | Wire additive and reductive combination machining equipment and application thereof |
| CN111037923A (en) * | 2019-11-05 | 2020-04-21 | 东北大学 | 3D printing and shaping machine and method for angle-laid carbon fiber/resin composite material product |
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- 2021-12-24 CN CN202111601844.8A patent/CN114274507B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106425490A (en) * | 2016-09-05 | 2017-02-22 | 华中科技大学 | Wire additive and reductive combination machining equipment and application thereof |
| CN111037923A (en) * | 2019-11-05 | 2020-04-21 | 东北大学 | 3D printing and shaping machine and method for angle-laid carbon fiber/resin composite material product |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118061538A (en) * | 2024-04-22 | 2024-05-24 | 成都贝高贝实业有限责任公司 | 3D printing-based stamping forming equipment and forming method thereof |
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