A frequency selective surface conformal pattern electro-spraying and laser etching combined machining device for complex curved surfaces and a control method thereof

Abstract

The application discloses a frequency selective surface conformal pattern electro-jet printing and laser etching combined machining device and a control method thereof, and belongs to the field of additive and subtractive combined machining manufacturing.The device comprises a bed body module, a motion module, an electro-jet printing module and a control module, a numerical control G code program is generated through a complex curved surface functional structure paving software, the numerical control G code program is controlled by an upper computer to drive a machine tool box, the bed body and the motion module are matched, and the accurate execution of a complex curved surface electro-jet printing path in the electro-jet printing and laser manufacturing process is completed, and the on-demand manufacturing of different types and different material functional structures can be realized by changing printing parameters of a flow field controller and an electric field controller in the electro-jet printing module.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of advanced manufacturing technology, and particularly designs a complex curved surface-oriented electro-spraying and laser etching composite machining device and method BACKGROUND

[0002] The frequency selective surface (FSS) conformal pattern on a complex curved surface is a periodic structure, and its core is constructed by countless regularly arranged metal units. This structure exhibits excellent electromagnetic wave control ability by virtue of its wideband characteristics, light material, and design flexibility. Through design, the frequency selective surface (FSS) conformal pattern can effectively realize the stealth function under different frequency bands and provide a powerful tool for electromagnetic wave control. It has been widely used in stealth technology, electromagnetic interference suppression and other fields, and has received extensive attention in recent years. Laser etching method can realize direct processing of (FSS) pattern on the surface of antenna cover, and has the characteristics of higher temperature resistance, no limitation of antenna cover shape, and process integrated forming. However, it is easily affected by many factors such as laser power, irradiation angle and irradiation time, and the etching efficiency is low. The electro-spraying technology based on the principle of electrohydrodynamics processes the (FSS) pattern on the surface of the antenna cover, and has the advantages of good stability, high efficiency and high dimensional accuracy. However, due to the complexity of the curved surface, it is technically challenging to accurately control the spraying position and shape of the electronic material.

[0003] In view of the above problems, it is urgent to develop a frequency selective surface (FSS) conformal pattern preparation device and its control method, which should have the advantages of simple operation, high precision, high stability and wide applicability. SUMMARY

[0004] The purpose of the present application is to solve the problem of high precision, high consistency, high efficiency and high stability of the preparation of frequency selective surface conformal pattern on complex curved surface, and to propose an improved composite machining device and its control method.

[0005] In order to achieve the above purpose, some embodiments of the present application provide a complex curved surface-oriented frequency selective surface conformal pattern electro-spraying and laser etching composite machining device, which comprises a bed body module, a motion module, an electro-spraying and laser etching composite module and a control module, wherein the electro-spraying and laser etching composite module comprises an electro-spraying module and a laser etching module; the bed body module is used to realize the support and stability of the whole device, can adjust the attitude position of the workpiece, has five degrees of freedom and can adjust the attitude of the workpiece with any curved surface shape; the motion module is used to realize the positioning of the machining position, the movement and adjustment of the position in the actual machining process; the electro-spraying and laser etching composite module is used to realize the machining of frequency selective surface (FSS) conformal pattern on complex curved surface. The control module is used to realize the path control in the machining process.

[0006] The bed body module comprises a bed body, a column, a sliding seat, a saddle, and a support seat. The column is bolted to the top of the bed body. The sliding seat is installed on the X-axis slider on the upper surface of the column. The saddle is installed on the guide rail. The support seat is bolted to the bed body. The bed body is the load-bearing base of the machine tool, providing installation for the components above the machine tool. The column and the support seat are the mounting seats of the B / C rotating shaft, serving to fix the B / C rotating shaft. The sliding seat is a load-bearing and sliding component, determining the sliding of the X-axis and the Y-axis, and bearing the weight of the saddle and the Z-axis. The saddle is the base of the Z-axis, serving to stabilize and slide.

[0007] In some embodiments, the bed body, the column, the sliding seat, the saddle, and the support seat are all processed by casting, together constituting the complete bed body structure and providing installation support for other functional parts.

[0008] The motion module comprises an X-axis, a Y-axis, a Z-axis, and a B / C rotating shaft. Specifically, the X-axis linear guide rail is fixed on the upper surface of the column, and the X-axis slider is fixed on the lower surface of the sliding seat and cooperates with the X-axis linear guide rail to ensure smooth sliding. The Y-axis linear guide rail is fixed on the lower surface of the saddle, and the Y-axis slider is fixed on the upper surface of the sliding seat and cooperates with the linear guide rail to ensure smooth sliding. The Z-axis linear guide rail is fixed on the back of the support plate, and the slider is fixed on the front surface of the saddle and cooperates with the Y-axis linear guide to ensure smooth sliding. The B / C rotating shaft is bolted to the column and the support seat. The above motion modules can be interconnected to achieve five degrees of freedom motion and realize the posture adjustment of complex surfaces.

[0009] The electric inkjet printing laser composite module includes an inkjet printing module, a laser etching module, an auxiliary X / Y axis, an auxiliary Z axis, a micro displacement holder, an observation camera, a measurement camera, a first adapter plate, a second adapter plate, and a third adapter plate. The auxiliary X / Y axis and the auxiliary Z axis are used for visual module data feedback adjustment, real-time correction of the processing route, and fine adjustment during the processing. Specifically, the electric inkjet printing module and the laser etching module are connected to the third adapter plate, the first adapter plate is connected to the auxiliary X / Y axis and the auxiliary Z axis, and the auxiliary X / Y axis is connected to the auxiliary Z axis through the second adapter plate. The auxiliary Z axis is fixed on the first adapter plate, and the first adapter plate is fixed on the supporting plate through bolts. The upper surface of the auxiliary X / Y axis is fixedly connected to the second adapter plate. The electric inkjet printing module is fixed on the third adapter plate, and the third adapter plate is fixed on the lower surface of the auxiliary X / Y axis. The laser etching module is fixed on the third adapter plate. The observation camera is fixed on the third adapter plate through a micro displacement stage, and is used for online image shooting and measurement of the conformal pattern processed by the electric inkjet printing laser composite module. The measurement camera is fixed on the third adapter plate through a micro displacement stage, and is used for real-time measurement of the height characteristic information of the curved surface, and then guides the movement of the electric inkjet printing laser composite module. The above inkjet printing components are coordinated and matched through an industrial computer to complete the electrohydrodynamic inkjet printing of functional materials.

[0010] Further, the inkjet printing module includes a liquid storage unit, a data processing unit, a nozzle fixing member, a nozzle, a laser emitting unit, a laser receiving unit, an electric control board, an XYZ three-axis small displacement holder, an L-shaped connecting plate, a height adjustment slide, an M1.6 countersunk slot, an aviation plug, and a gas pipe adapter. Specifically, the liquid storage unit is a cylindrical structure, and is connected to the nozzle through the bottom thread to store functional ink. The nozzle fixing member is used to accommodate and fix the nozzle, and is internally provided with a small hole to accommodate and fix a metal probe. The probe is connected to a wire and contacts the nozzle made of metal, and the electric control board is connected to the aviation plug to realize conduction. The nozzle is composed of two parts: one is a adapter part used to cooperate with the nozzle fixing member for fixation, and is a hollow structure used for liquid delivery; and the other is a replaceable needle tip. The laser emitting unit is used to emit laser, and the laser receiving unit is used to receive reflected laser. The data processing unit is used to process the data of laser feedback. The inclination angles of the laser emitting unit and the laser receiving unit with the horizontal plane are both 45 degrees, and they are respectively arranged on the two sides of the nozzle. The M1.6 countersunk slot is connected and fixed to the height adjustment slide through four M1.6 bolts, and the height adjustment slide is used for fine adjustment of the height of the nozzle during the processing. The L-shaped connecting plate is used as a connecting part between the height adjustment slide and the XYZ three-axis small displacement holder, and the XYZ three-axis small displacement holder plays a role in fine adjustment in the XYZ direction. The gas pipe adapter is connected to the upper part of the liquid storage unit, and is connected to the gas pipe. The other end of the gas pipe is connected to a flow field controller.

[0011] Further, the laser etching module comprises a laser, an optical device, a scanning head, a galvanometer, a field lens, and a connecting seat. The laser beam is emitted by the ultraviolet picosecond laser, is adjusted and reflected into the scanning head by the optical device, and high-precision etching work is achieved by adjusting the laser focal length, laser beam energy, and laser movement speed through the cooperation of the galvanometer and the field lens. The whole is connected to the third adapter plate by the connecting seat.

[0012] The control module comprises a machine tool drive box, a jet printing module drive box, a laser module control box, an industrial computer, a flow field controller, an electric field controller, and an upper computer. The machine tool drive box controls the X-axis, Y-axis, Z-axis, and B / C rotating shaft to realize movement, communicates with the industrial computer, and realizes direct control of the machine tool drive box by the upper computer. The jet printing module drive box controls the data processing unit and the XYZ three-axis small displacement cloud platform to realize parameter adjustment and movement control of jet printing, and communicates with the industrial computer to realize direct control by the upper computer. The output end of the flow field controller is connected with the liquid storage unit to realize the supply of driving force, and communicates with the industrial computer to realize direct control by the upper computer. The output end of the electric field controller is connected with the electrojet printing valve to realize the application of electric parameters, and communicates with the industrial computer to realize direct control by the upper computer. The upper computer is connected with the industrial computer to realize real-time display. The above control modules cooperate with each other to realize on-demand jet printing manufacturing of functional structures. The laser module drive box controls the laser etching module to adjust the focal length, etching power, and scanning angle of the laser.

[0013] Further, the laser etching module and the jet printing module work cooperatively and complementarily, and precise positioning is realized through auxiliary observation by the observation camera and the measurement camera to realize high-precision conformal pattern manufacturing.

[0014] Further, the electrojet printing module further comprises a shell mounted on the outside of the jet printing module. The shell is opened for convenient feeding and position adjustment during preparation work, and is closed when the preparation work is completed to prevent dust from falling into and affecting the precision, and to provide protection and support for the inside of the electrojet printing module.

[0015] Further, the laser etching module is configured to adjust the power of the laser, the size of the laser focusing spot, and the etching rate according to the size, thickness, and electrical performance requirements of the processed conformal pattern, so as to achieve ideal etching effect.

[0016] Some embodiments of the present application propose a jet printing laser composite machining method using the above-mentioned complex curved surface frequency selective surface conformal pattern jet printing laser composite machining device, which comprises the following steps:

[0017] Step 1: the workpiece to be processed is clamped on the workbench of the concentric turntable, after clamping, the machine tool drive box is started and the machine tool is started, the workpiece to be processed is adjusted to the initial processing position, after determining that the initial processing position is correct, the X axis, Y axis and Z axis are moved to move the electro-spraying and laser composite module to the initial processing position, and the processing is waited;

[0018] Step 2: the model of the workpiece to be processed and the frequency selective surface (FSS) conformal pattern to be processed are imported into the upper computer, the frequency selective surface (FSS) conformal pattern array to be processed is laid on the workpiece model to be processed in the upper computer, and the processing path and the starting position and the ending position are generated. The numerical control G code path trajectory program is generated by the industrial computer processing;

[0019] Step 3: install the functional material of the spraying into the liquid storage unit, connect the output of the flow field controller to the storage pipe liquid storage unit, connect the output of the electric field controller to the electric control board, and open the spraying module drive box. The laser module drive box is connected to the laser, the laser is started, the observation camera, the measurement camera and the laser range finder are started, and the corresponding camera observation window is opened in the upper computer;

[0020] Step 4: start the spraying and laser etching composite processing control program in the upper computer, execute the numerical control G code trajectory program generated by the industrial computer processing, first, the laser emitting unit and the laser receiving unit will carry out the ranging of the starting point, according to the ranging value, the height is compensated in real time, according to the type of functional structure, the spraying and laser etching process are carried out according to the generated path by means of auxiliary X / Y axis and auxiliary Z axis;

[0021] Step 5: the upper computer displays the current processing state in real time and records the defect position of the functional structure according to the real-time effect, so as to facilitate secondary accurate repair. The industrial computer controls the movement process of the spraying module and the laser etching module according to the program, and different conformal functional structures on different curved surface workpieces are processed.

[0022] The beneficial effects of the present application include:

[0023] Firstly, the composite processing equipment provided by the present application, the X axis, Y axis, Z axis, B / C rotating shaft and bed module jointly constitute a five-axis machine tool, the five-axis machine tool can adjust the attitude position of the workpiece during printing, and has five degrees of freedom to adjust the attitude of any curved surface workpiece. On the basis of five-axis movement, the electro-spraying module moves the electro-spraying valve to the specified position to start spraying work, and the laser etcher works cooperatively. Due to the diversification of the size of the conformal pattern functional structure, different parameters of spraying and laser can be applied to complete the work.

[0024] Secondly, the present application is to compensate the surface topography error of the workpiece to achieve the requirement of conformal manufacturing, and the in-situ measurement of the surface of the workpiece is carried out before the composite machining starts, and the measured data is compensated into the actual height in the machining process, so that high-precision conformal manufacturing is realized.

[0025] Thirdly, the present application is to realize the online pre-curing of the functional structure of the spray printing, and the power of the laser etcher can be adjusted first to make it solidify the pattern. According to the spray printing path, the pre-curing is realized. In the process of composite machining, professional numerical control G code program is generated through path planning software, so that high stability and controllability in the spray printing process are ensured.

[0026] Fourthly, the electro-spray printing valve adopts a professional developed flow field controller and an electric field controller for parameter adjustment, so that high-precision and high-efficiency spray printing of multiple materials on demand is realized.

[0027] Fifthly, the device and method provided by the present application can be compatible with multiple types of metal units, significantly reducing the breakage rate of the units in the preparation process, so that the preparation of the conformal pattern is more accurate and reliable. Under the synergistic action of laser etching and electro-spray printing, the resolution of the conformal pattern preparation is improved by adjusting the electric parameters and the laser etching angle, the preparation of different conformal patterns on complex curved surfaces is realized, and the problem of high-precision and high-efficiency preparation of frequency selective surface (FSS) conformal patterns on complex curved surfaces is solved.

[0028] In summary, the device and method of the present application have the advantages of reliable structure, fast manufacturing efficiency, high machining precision, wide material applicability, and path automation. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic diagram of the device for the electro-spray printing and laser etching composite machining manufacturing of the frequency selective surface conformal pattern structure facing complex curved surfaces.

[0030] Figure 2 It is a schematic diagram of the structure of the electro-spray printing and laser composite module in the device.

[0031] Figure 3 It is a schematic diagram of the structure of the laser etching module in the device.

[0032] Figure 4 It is a schematic diagram of the installation position of the workpiece and the B / C rotating shaft in the device.

[0033] Figure 5 It is a schematic diagram of the installation position of the X-axis, Y-axis and Z-axis sliders and linear guides in the device.

[0034] Figure 6 It is a schematic diagram of the structure of the spray printing module in the device.

[0035] In the figure: 1 bed module; 2 motion module; 3 electric inkjet laser composite module; 4 control module; 11 bed; 12 column; 13 slide; 14 saddle; 15 support seat; 111 bolt; 112 bolt; 113 turntable; 114 workpiece; 115 bolt; 116 bolt; 21 X-axis; 22 Y-axis; 23 Z-axis; 24 B / C rotation axis; 211 X-axis linear guide rail; 212 X-axis slide; 221 Y-axis slide; 222 Y-axis linear guide rail; 231 Z-axis slide; 232 Z-axis linear guide rail; 31 inkjet module; 32 laser etching module; 33 auxiliary X / Y-axis; 34 auxiliary Z-axis; 35 micro-displacement holder; 36 observation camera; 37 measurement camera; 38 bolt; 310 supporting plate; 311 liquid storage unit; 312 data processing unit; 313 inkjet head fixing part; 314 inkjet head; 315 laser emitting unit; 316 laser receiving unit; 317 electric control board; 318 XYZ three-axis small displacement holder; 319 L-shaped connecting plate; 3110 height adjustment slide; 3111 M1.6 countersunk slot hole; 3112 aviation plug; 3113 air pipe adapter; 321 laser; 322 optical device; 323 scanning head; 324 galvanometer; 325 field lens; 326 connecting seat; 391 first adapter plate; 392 second adapter plate; 393 third adapter plate; 41 machine tool drive box; 42 inkjet module drive box; 43 laser module drive box; 44 industrial computer; 45 flow field controller; 46 electric field controller; 47 upper computer. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present application more clear, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0037] Overall, some embodiments of the present application propose a frequency selective surface conformal pattern electric inkjet laser etching composite machining device for complex curved surfaces, which includes a bed module 1, a motion module 2, an electric inkjet laser composite module 3 and a control module 4; the bed module 1 is used to realize the support and stability of the device and adjust the attitude position of the curved surface-shaped workpiece, the bed module 1 has five degrees of freedom to adjust the attitude of the curved surface-shaped workpiece; the motion module 2 is used to realize the positioning of the machining position of the curved surface-shaped workpiece, and the movement and adjustment of the position of the curved surface-shaped workpiece during actual machining; the electric inkjet laser composite module 3 includes an electric inkjet module 31 and a laser etching module 32; the laser etching module 32 works with the inkjet module 31 to process a frequency selective surface conformal pattern on the curved surface-shaped workpiece according to a path; the control module 4 is used to realize the control of the path.

[0038] Specifically, the bed body module 1 comprises a bed body 11, a column 12, a sliding seat 13, a saddle 14 and a support seat 15; the column 12 is installed above the bed body 11, the sliding seat 13 is installed on the X-axis sliding block 212 on the upper surface of the column 12, the saddle 14 is installed on the guide rail 222, and the support seat 15 is installed on the bed body 11; the bed body 11 serves as the load-bearing foundation of the machine tool, the column 12 and the support seat 15 are the mounting seats of the B / C rotating shaft 24; the sliding seat 13 is used to realize the sliding of the X-axis 21 and the Y-axis 22, while bearing the weight of the saddle 14 and the Z-axis 23; the saddle 14 is the base of the fixed Z-axis 23, and plays the role of stability and sliding.

[0039] As shown in Figure 4 , Figure 5 The motion module 2 comprises an X-axis 21, a Y-axis 22, a Z-axis 23, and a B / C rotating shaft 24; the X-axis linear guide rail 211 in the X-axis 21 is fixed on the upper surface of the column 12, the X-axis sliding block 212 is fixed on the lower surface of the sliding seat 13 and cooperates with the X-axis linear guide rail 211 to ensure smooth sliding; the Y-axis linear guide rail 222 in the Y-axis 22 is fixed on the lower surface of the saddle 14, the Y-axis sliding block 221 is fixed on the upper surface of the sliding seat 13 and cooperates with the linear guide rail 222 to ensure smooth sliding; the Z-axis linear guide rail 232 in the Z-axis 23 is fixed on the back of the supporting plate 310, the sliding block 231 is fixed on the front surface of the saddle 14 and cooperates with the Y-axis linear guide rail 232 to ensure smooth sliding; the B / C rotating shaft 24 is fixed to the column 12 by screws 116 and to the support seat 15 by screws 111 and 112; the above motion modules can be linked with each other to achieve five degrees of freedom motion and realize the posture adjustment of complex surfaces. The B / C rotating shaft 24 comprises a turntable 113, which supports the workpiece to be processed, also referred to as the workpiece.

[0040] As shown in Figure 2As shown, in addition to the electro-spraying printing module 31 and the laser etching module 32, the electro-spraying printing laser composite module 3 further comprises an auxiliary X / Y axis 33, an auxiliary Z axis 34, a micro-displacement holder 35, an observation camera 36, a measurement camera 37; a first adapter plate 391, a second adapter plate 392 and a third adapter plate 393. The auxiliary X / Y / Z axis is used for feedback adjustment according to the data measured by the measurement camera, real-time correction of the processing route, and fine adjustment during the processing. The first adapter plate 391 is connected with the auxiliary X / Y axis 33, and the auxiliary X / Y axis 33 is connected with the auxiliary Z axis 34 through the second adapter plate 392. The auxiliary Z axis 34 is fixed on the first adapter plate 391, and the first adapter plate 391 is fixed on the supporting plate 310. The upper surface of the auxiliary X / Y axis 33 is fixedly connected with the second adapter plate 392. The electro-spraying printing module 31 and the laser etching module 32 are fixed on the third adapter plate 393, and the third adapter plate 393 is fixed on the lower surface of the auxiliary X / Y axis 33. The observation camera 36 is fixed on the third adapter plate 393 through the micro-displacement holder 35, and is used for online image shooting and measurement of the conformal pattern processed by the electro-spraying printing laser composite module. The measurement camera 37 is fixed on the third adapter plate 393 through the micro-displacement holder 35, and is used for real-time measurement of the height characteristic information of the curved surface, which is then used as the guide of the movement of the electro-spraying printing laser composite module.

[0041] As Figure 2 、 Figure 6As shown, the inkjet printing module 31 includes a liquid storage unit 311, a data processing unit 312, a nozzle fixing member 313, a nozzle 314, a laser emitting unit 315, a laser receiving unit 316, an electric control board 317, an XYZ three-axis small displacement cloud platform 318, an L-shaped connecting plate 319, a height adjustment slider 3110, a countersunk slot hole 3111, an aviation plug 3112, and an air pipe adapter 3113. The liquid storage unit 311 is a cylindrical structure, connected to the nozzle 314 at the bottom, and used for storing functional ink. The nozzle fixing member 313 is used to accommodate and fix the nozzle 314, and is internally provided with a small hole to accommodate and fix a metal probe. The probe is connected to a wire and contacts the nozzle made of metal. The aviation plug 3112 is connected to the electric control board 317 to realize conduction. The nozzle 314 is composed of two parts: an adapter part for cooperation with the nozzle fixing member to be fixed, and a replaceable needle tip. The adapter part is a hollow structure for infusion. The laser emitting unit 315 is used for emitting laser, and the laser receiving unit 316 is used for receiving reflected laser. The data processing unit 312 is used for processing data feedback by laser. The laser emitting unit 315 and the laser receiving unit 316 are both at an angle of 45 degrees with the horizontal plane, and are respectively arranged on both sides of the nozzle 314. The countersunk slot hole 3111 is connected and fixed to the height adjustment slider 3110 by a bolt. The height adjustment slider 3110 is used for fine adjustment of the height of the nozzle during processing. The L-shaped connecting plate 319 serves as a connecting part between the height adjustment slider 3110 and the XYZ three-axis small displacement cloud platform 318. The XYZ three-axis small displacement cloud platform 318 plays a role in fine adjustment in three directions of XYZ. The air pipe adapter 3113 is connected to the upper part of the liquid storage unit 311 and connected to an air pipe. The other end of the air pipe is connected to a flow field controller 45.

[0042] As shown in Figure 3 The laser etching module 32 includes a laser 321, an optical device 322, a scanning head 323, a galvanometer 324, a field lens 325, and a connecting seat 326. The laser beam is emitted by the ultraviolet picosecond laser 321, adjusted by the optical device 322, and reflected into the scanning head 323. The laser focal length, laser beam energy, and laser moving speed are adjusted by the galvanometer 324 and the field lens 325 to realize high-precision etching work. The whole is connected to the third adapter plate 393 by the connecting seat 326. The laser etching module 32 is configured to adjust the power of the laser 321, the size of the laser focusing spot, and the etching rate according to the size, thickness, and electrical performance requirements of the processed conformal pattern.

[0043] The control module 4 comprises a machine tool drive box 41, a jet printing module drive box 42, a laser module control box 43, an industrial computer 44, a flow field controller 45, an electric field controller 46 and an upper computer 47; the machine tool drive box 41 controls X-axis 21, Y-axis 22, Z-axis 23 and B / C rotating shaft 24 to realize movement, communicates with the industrial computer 44 and realizes direct control of the upper computer 47 on the machine tool drive box 41; the jet printing module drive box 42 controls the data processing unit 312 and XYZ three-axis small displacement cloud cover 318 to realize parameter adjustment and movement control of jet printing, communicates with the industrial computer 44 and realizes direct control of the upper computer 47; the output end of the flow field controller 45 is connected with the liquid storage unit 311 to realize driving force supply, communicates with the industrial computer 44 and realizes direct control of the upper computer 47; the output end of the electric field controller 46 is connected with the electrojet printing valve to realize electric parameter application, communicates with the industrial computer 44 and realizes direct control of the upper computer 47; the upper computer 47 is connected with the industrial computer 44 to realize real-time display; the above control modules cooperate to realize on-demand jet printing manufacturing of functional structures; the laser module drive box 43 controls the laser etching module 32 to adjust the focal length, etching power and / or scanning angle of the laser.

[0044] In some embodiments, the bed body 11, the column 12, the slide 13, the saddle 14 and the support seat 15 are all machined by casting, and together constitute a complete bed body structure.

[0045] The application also proposes a control method of the frequency selective surface conformal pattern electrojet printing and laser etching composite machining device of any one of the above, which uses the conformal pattern electrojet printing and laser etching composite machining equipment to perform jet printing and laser machining, and comprises the following steps:

[0046] Step 1: clamp the workpiece 114 to be machined on the workbench of the concentric turntable 113, as shown in Figure 3 After clamping, start the machine tool drive box 41 and start the machine tool, adjust the workpiece 114 to be machined to the initial machining position, move the X-axis 21, Y-axis 22 and Z-axis 23 to move the electrojet printing and laser composite module 3 to the initial machining position, and wait for machining;

[0047] Step 2: import the model of the workpiece 114 to be machined and the frequency selective surface conformal pattern to be machined into the upper computer 47, lay the frequency selective surface conformal pattern array to be machined on the model of the workpiece 114 to be machined in the upper computer 47, generate the machining path and the machining starting position and ending position, and generate the numerical control G code path trajectory program through the industrial computer 44;

[0048] Step 3: Install the jetting functional material into the storage unit 311, the flow field controller 45 output is connected to the storage tube storage unit 311, the electric field controller 46 output is connected to the electric control board 317, and the jetting module drive box is opened; the laser module drive box 43 is connected to the laser 321, the laser 321 is started, the observation camera 36, the measurement camera 37, and the laser range finder are started, and the corresponding camera observation window in the upper computer 47 is opened;

[0049] Step 4: Start the jetting and laser etching combined machining control program in the upper computer 47, execute the numerical control G code track program generated by the industrial computer 44, first the laser emitting unit 315 and the laser receiving unit 316 will perform distance measurement at the starting point, according to the distance measurement value, real-time compensation of height is carried out, according to the type of functional structure, with the aid of auxiliary X / Y axis 33 and auxiliary Z axis 34, then according to the generated path, jetting and laser etching process is carried out, including first importing the pattern to be etched into the control system of the laser etching machine, placing the material to be processed on the workbench of the laser etching machine, and ensuring its position fixed and stable; according to the type and thickness of the material, adjust the parameters of the laser, such as power, frequency, etc.; according to the preset path, start the laser head to irradiate accurately, so as to realize the graphic and text engraving; according to the preset path, start the laser head to irradiate accurately; the laser beam produces physical or chemical reaction on the surface of the material, so as to realize the graphic and text engraving;

[0050] Step 5: The upper computer 47 displays the current processing state in real time and records the defective position of the functional structure according to the real-time effect, so as to facilitate secondary accurate repair; the industrial computer 44 controls the movement process of the jetting module 31 and the laser etching module 32 according to the program, and processes different conformal functional structures on different curved surface workpieces.

[0051] In one specific embodiment, as Figure 1As shown, the machine tool bed 1 is composed of four parts, namely the bed body 11, the column 12, the slide 13 and the saddle 14. From the installation position, the bed body 11, the column 12, the slide 13 and the saddle 14 are sequentially arranged from bottom to top. This is the support framework of the machine tool, which is processed by casting process and determines the stability and precision of the machine tool. In addition, the installation positions of the X-axis 21, the Y-axis 22, the Z-axis 23 and the B / C rotating shaft 24 are reserved at the corresponding positions of these components. The bed body 11 is at the bottom, the column 12 is installed above the bed body 11 through the bolt 115, the column 12 is connected with the slide 13 through the X-axis 21 and is below the slide 13, the saddle 14 is connected with the slide 13 through the Y-axis 22 and is above the slide 13, the Z-axis 23 is located on the front surface of the saddle 14 and carries the electric spraying and laser composite module 3 through the supporting plate 310, and the B / C rotating shaft 24 is installed on the column 12 and the support seat 15. The machine tool drive box 41 is connected with the X-axis 21, the Y-axis 22, the Z-axis 23 and the B / C rotating shaft 24 respectively, realizes the power supply and motion control of the motor module, realizes the five degrees of freedom machining of the machine tool through the linkage cooperation between the five axes, and solves the device problem of conformal manufacturing of complex curved surface functional structure.

[0052] As Figure 2As shown, the electrospray printing laser composite module 3 is an important component of the overall device and determines the quality of the conformal pattern function structure. The liquid storage unit 311 is connected to the nozzle 315 through the bottom thread, which is used to store functional ink. The nozzle fixing part 313 has a complex chamber structure inside, which is used to accommodate and fix the nozzle 5, and at the same time, a small hole is provided to accommodate and fix the metal probe. The probe is connected to the wire and contacts the nozzle made of metal. The control board 317 is connected to the aviation plug 3112 to realize conduction. The nozzle 315 is composed of two parts. One is the adapter part used to cooperate with the nozzle fixing part to fix it, which is a hollow structure inside for liquid delivery. The other is a replaceable needle tip. The laser emitting unit 315 is used to emit laser, and the laser receiving unit 316 is used to receive the reflected laser. The data processing unit 312 is used to process the data of the laser feedback. The inclination angle of the laser emitting unit 315 and the laser receiving unit 316 with the horizontal plane is 45 degrees, and they are respectively placed on both sides of the nozzle. The M1.6 countersunk slot hole 3111 is connected and fixed by four M1.6 bolts and height adjustment sliders 3110. The L-shaped connecting plate 319 is used as a connecting part between the height adjustment slider 3110 and the XYZ three-axis small displacement cloud platform 318. The XYZ-axis small displacement cloud platform 318 plays a role in fine adjustment in XYZ direction. The front end of the laser 321 is sequentially connected to the optical device 322, the scanning head 323, the galvanometer 324 and the field lens 325. The rear end of the laser 321 is connected to the seat 326, which is connected to the third adapter plate 393. The laser 321 can be a ultraviolet picosecond laser 321. The laser beam is emitted from the laser 321, adjusted by the optical device 322 and reflected into the scanning head 323. Through the cooperation of the galvanometer 324 and the field lens 325, the laser focal length, laser beam energy and laser moving speed are adjusted to realize high-precision etching work. Before starting the processing work, install the liquid storage unit 311 in the printing module, connect the flow field controller and the electric field controller, and turn on the laser emitting unit 315, the laser receiving unit 316 and the data processing unit 312, the measurement camera 36, the observation camera 37 and the laser 321. Through the observation camera 36, the starting point of the work can be quickly located. Through the laser emitting unit 315, the laser receiving unit 316 and the data processing unit 312, the surface topography error of the workpiece can be compensated.

[0053] The industrial computer 44 is connected with the machine tool driving box 41, the jet printing module driving box 42, the flow field controller 45, the electric field controller 46 and the upper computer 47. The upper computer 47 can control the movement of the machine tool through the numerical control G code program of the finished functional structure; the jet printing module driving box 42 is controlled through the electrofluidic jet printing software to realize the work of the electrofluidic jet printing module; the flow field controller 45 is controlled to provide stable driving force for the liquid storage unit 311, so that the functional material is appropriately given; the electric field controller 46 is controlled to create a high-voltage electric field for the electric control board 317, so that the conical jet flow is formed. On the basis of the above, the G code program of the five-axis machine tool will be used to jet print and manufacture the complex curved surface functional structure.

[0054] The electrofluidic jet printing laser composite machining method is carried out by using the above-mentioned complex curved surface conformal pattern electrofluidic jet printing laser composite machining device, and includes the following steps:

[0055] Step 1: clamp the workpiece 114 to be machined on the workbench of the concentric turntable 113, clamp it after clamping, start the machine tool driving box 41 and start the machine tool, adjust the workpiece 114 to be machined to the initial machining position, move the X axis 21, Y axis 22 and Z axis 23 to move the electrofluidic jet printing laser composite module 3 to the initial machining position, and wait for machining.

[0056] Step 2: import the model of the workpiece 114 to be machined and the frequency selective surface (FSS) conformal pattern to be machined into the upper computer 47, lay the frequency selective surface (FSS) conformal pattern array to be machined on the model of the workpiece 114 to be machined in the upper computer 47, generate the machining path and the machining starting position and ending position. The numerical control G code path trajectory program is generated through the industrial computer 44.

[0057] Step 3: install the jet printing functional material into the liquid storage unit 311, connect the output of the flow field controller 45 to the liquid storage pipe liquid storage unit 311, connect the output of the electric field controller 6 to the electric control board 317, and open the jet printing module driving box. The laser module driving box 43 is connected with the laser 321, the laser 321 is started, the observation camera 36, the measurement camera 37 and the laser range finder are started, and the corresponding camera observation window is opened in the upper computer 47.

[0058] Step 4: Start the laser etching and inkjet printing combined machining control program in the host computer 47, execute the numerical control G code track program generated by the industrial computer 44, first the laser emitting unit 315 and the laser receiving unit 316 will conduct distance measurement at the starting point, and according to the distance measurement value, real-time compensation of the height is conducted, according to the type of functional structure, the auxiliary X / Y axis 33 and the auxiliary Z axis 34 are used to conduct inkjet printing and laser etching process according to the generated path, for example, including first importing the pattern to be etched into the control system of the laser etching machine, placing the material to be machined on the workbench of the laser etching machine, and ensuring that the position is fixed and stable; according to the type and thickness of the material, the parameters of the laser are adjusted, such as power, frequency, etc.; according to the preset path, the laser head is started to conduct accurate irradiation, so as to realize graphic engraving; according to the preset path, the laser head is started to conduct accurate irradiation; the laser beam locally produces physical or chemical reaction on the material surface, so as to realize graphic engraving.

[0059] Step 5: The host computer 47 displays the current machining state in real time and records the defect position of the functional structure according to the real-time effect, so as to facilitate secondary accurate repair. The industrial computer 44 controls the movement process of the inkjet printing module 31 and the laser etching module 32 according to the program, and different conformal functional structures on different curved surface workpieces are machined.

[0060] Before the inkjet printing and laser etching combined machining is conducted, first the workpiece 114 should be firmly installed on the turntable 113 and the turntable 113 is modulated to be horizontal, and then the starting point of the inkjet printing to be manufactured is determined. The current workpiece 114 model is imported into the host computer 7, the functional structure is laid on the surface of the workpiece 14, after path planning teaching, path planning code is generated, and finally inkjet printing control numerical control G code is generated after post-processing. The G code is transmitted into the host computer 47, the start inkjet printing instruction is issued into the machine tool driving box 41, the inkjet printing module driving box 42, the flow field controller 45, the electric field controller 46, the laser etching instruction is issued into the machine tool driving box 41, the laser module driving box 43, and the electric field controller 46, and then the start is required according to the workpiece to prepare complex curved surface functional structure.

[0061] In summary of the above, the present application provides a kind of frequency selective surface conformal pattern electric inkjet printing and laser etching combined machining device and method for complex curved surface, solve the technical demand of high precision, high consistency, high efficiency and high stability preparation of frequency selective surface (FSS) conformal pattern on complex curved surface.The proposed complex curved surface functional structure electric fluid inkjet printing manufacturing and laser etching device and method are cooperated with laser etching machine, a special inkjet printing machine bed for complex curved surface substrate is innovatively designed, through five-axis motion posture adjustment and cooperation of multifunctional inkjet printing module, functional structure multi-material, high-precision, high-efficiency, non-damage manufacturing can be realized, with inkjet printing whole process automation, forming fast, high efficiency and other characteristics, has good application prospect in precision machining, micro-nano machining and other fields.

[0062] The present application is not limited to the embodiments described above, and any equivalent concept or change within the technical scope disclosed in the present application is included in the scope of the present application.

Claims

1. A frequency-selective surface conformal pattern electro-inking and laser etching composite processing device for complex curved surfaces, characterized in that: Comprising a bed module (1), a motion module (2), an electro-spraying laser composite module (3) and a control module (4); the bed module (1) is used to realize the support and stability of the processing device and adjust the attitude position of the curved surface workpiece, the bed module (1) has five degrees of freedom to adjust the attitude of the curved surface workpiece; the motion module (2) is used to realize the positioning of the processing position of the curved surface workpiece, and the movement and adjustment of the position of the curved surface workpiece during actual processing; the electro-spraying laser composite module (3) includes an electro-spraying module (31) and a laser etching module (32); the laser etching module (32) and the electro-spraying module (31) work together to process a frequency selective surface conformal pattern on the curved surface workpiece according to a path; the control module (4) is used to realize the control of the path; wherein the electro-spraying laser composite module (3) further includes an auxiliary X / Y axis (33), an auxiliary Z axis (34), a micro-displacement holder (35), an observation camera (36), a measurement camera (37), a first adapter plate (391), a second adapter plate (392), and a third adapter plate (393); the auxiliary X / Y / Z axis is used for visual module data feedback adjustment, real-time correction of processing route, and fine adjustment during processing; the first adapter plate (391) is connected with the auxiliary X / Y axis (33), the auxiliary X / Y axis (33) is connected with the auxiliary Z axis (34) through the second adapter plate (392); the auxiliary Z axis (34) is fixed on the first adapter plate (391), and the first adapter plate (391) is fixed on the supporting plate (310); the upper surface of the auxiliary X / Y axis (33) is fixedly connected with the second adapter plate (392); the electro-spraying module (31) and the laser etching module (32) are fixed on the third adapter plate (393), and the third adapter plate (393) is fixed on the lower surface of the auxiliary X / Y axis (33); the observation camera (36) is fixed on the third adapter plate (393) through the micro-displacement holder (35), and is used for online image shooting and measurement of the conformal pattern processed by the electro-spraying laser composite module; the measurement camera (37) is fixed on the third adapter plate (393) through the micro-displacement holder (35), and is used for real-time measurement of the height characteristic information of the curved surface, which is then used as the guide of the movement of the electro-spraying laser composite module; The electric jet printing module (31) comprises a liquid storage unit (311), a data processing unit (312), a nozzle fixing part (313), a special nozzle (314), a laser emitting unit (315), a laser receiving unit (316), an electric control board (317), an XYZ three-axis small displacement cloud platform (318), an L-shaped connecting plate (319), a height adjustment slider (3110), a countersunk slot (3111), an aviation plug (3112), and a gas pipe adapter (3113); the liquid storage unit (311) is a cylindrical structure, the bottom of which is connected with the special nozzle (314) for storing functional ink; the nozzle fixing part (313) is used for accommodating and fixing the nozzle (5), and a small hole is arranged in the nozzle fixing part (313) for accommodating and fixing a metal probe, the probe is connected with a wire and contacts the nozzle made of metal, and the electric control board (317) is connected with the aviation plug (3112) to realize conduction; the special nozzle (314) is composed of two parts, namely, an adapter part for cooperation with the nozzle fixing part and a replaceable needle tip; the adapter part is a hollow structure for liquid delivery; the laser emitting unit (315) is used for emitting laser, and the laser receiving unit (316) is used for receiving reflected laser; the data processing unit (312) is used for processing data fed back by laser; the inclination angles of the laser emitting unit (315) and the laser receiving unit (316) with the horizontal plane are both 45 degrees, and the laser emitting unit (315) and the laser receiving unit (316) are arranged on the two sides of the nozzle (314) respectively; the countersunk slot (3111) is connected with and fixes the height adjustment slider (3110) through a bolt, and the height adjustment slider (3110) is used for fine adjustment of the height of the nozzle during processing; the L-shaped connecting plate (319) is a connecting part between the height adjustment slider (3110) and the XYZ three-axis small displacement cloud platform (318), and the XYZ three-axis small displacement cloud platform (318) plays a role in fine adjustment in three directions; the gas pipe adapter (3113) is connected with the upper part of the liquid storage unit (311) and connected with a gas pipe, and the other end of the gas pipe is connected with a flow field controller (45).

2. The complex-curved-surface conformal patterned FSS coform apparatus of laser etching combined with inkjet printing of claim 1, wherein: The bed body module (1) comprises a bed body (11), a column (12), a sliding seat (13), a saddle (14) and a support seat (15); the column (12) is installed above the bed body (11), the sliding seat (13) is installed on the X-axis sliding block (212) on the upper surface of the column (12), the saddle (14) is installed on the Y-axis linear guide rail (222), and the support seat (15) is installed on the bed body (11); the bed body (11) serves as a bearing base of the machine tool, the column (12) and the support seat (15) are mounting seats of the B / C rotating shaft (24); the sliding seat (13) is used for realizing sliding of the X-axis (21) and the Y-axis (22), and simultaneously bearing the weight of the saddle (14) and the Z-axis (23); and the saddle (14) is a base for fixing the Z-axis (23).

3. The complex-curved-surface conformal patterned FSS coform device of claim 2, wherein: The motion module (2) comprises an X-axis (21), a Y-axis (22), a Z-axis (23), and a B / C rotating shaft (24); the X-axis linear guide rail (211) of the X-axis (21) is fixed on the upper surface of the column (12), the X-axis slider (212) is fixed on the lower surface of the slide (13) and cooperates with the X-axis linear guide rail (211) to ensure smooth sliding; the Y-axis linear guide rail (222) of the Y-axis (22) is fixed on the lower surface of the saddle (14), the Y-axis slider (221) is fixed on the upper surface of the slide (13) and cooperates with the Y-axis linear guide rail (222) to ensure smooth sliding; the Z-axis linear guide rail (232) of the Z-axis (23) is fixed on the back of the supporting plate (310), the slider (231) is fixed on the front surface of the saddle (14) and cooperates with the Y-axis linear guide rail (222) to ensure smooth sliding; the B / C rotating shaft (24) is fixed on the column (12) and the supporting seat (15).

4. The complex curved surface oriented frequency selective surface conformal pattern electro-jet printing laser etching hybrid machining apparatus of claim 1, wherein, The laser etching module (32) comprises a laser (321), an optical device (322), a scanning head (323), a galvanometer (324), a field lens (325), and a connecting seat (326); the laser beam is emitted by the ultraviolet picosecond laser (321), is adjusted and reflected by the optical device (322) into the scanning head (323), and is adjusted by the galvanometer (324) and the field lens (325) to realize high-precision etching work in terms of laser focal length, laser beam energy, and laser moving speed; the whole is connected to the third adapter plate (393) by the connecting seat (326).

5. The complex curved surface oriented frequency selective surface conformal pattern electro-jet printing laser etching hybrid machining apparatus of claim 2, wherein, The laser etching module (32) is configured to adjust the power of the laser (321), the size of the laser focusing spot, and the etching rate according to the size, thickness, and electrical performance requirements of the processed conformal pattern.

6. The complex curved surface oriented frequency selective surface conformal pattern electro-jet printing laser etching hybrid machining apparatus of claim 1, wherein, The control module (4) comprises a machine tool drive box (41), a printing module drive box (42), a laser module drive box (43), an industrial computer (44), a flow field controller (45), an electric field controller (46), and an upper computer (47). The machine tool driving box (41) controls X-axis (21), Y-axis (22), Z-axis (23), B / C rotating shaft (24) to realize movement, communicates with the industrial computer (44), and realizes direct control of the upper computer (47) on the machine tool driving box (41); the jet printing module driving box (42) controls the data processing unit (312), the XYZ three-axis small displacement cloud platform (318), realizes parameter adjustment and motion control of jet printing, and communicates with the industrial computer (44), and realizes direct control of the upper computer (47); the flow field controller (45) is connected with the liquid storage unit (311) at the output end, realizes the supply of driving force, and communicates with the industrial computer (44), realizes the direct control of the upper computer (47); the electric field controller (46) is connected with the electrojet printing valve at the output end, realizes the application of electric parameters, and communicates with the industrial computer (44), realizes the direct control of the upper computer (47); the upper computer (47) is connected with the industrial computer (44), realizes real-time display; the laser module driving box (43) controls the laser etching module (32) to adjust the focal length, etching power and / or scanning angle of the laser.

7. The complex curved surface oriented frequency selective surface conformal pattern electro-jet printing laser etching hybrid machining apparatus of claim 2, wherein, The bed body (11), the column (12), the slide (13), the saddle (14) and the support seat (15) are all processed by casting, and together constitute a complete bed body structure.

8. A method of controlling a complex-curved-surface-oriented frequency selective surface conformal pattern electro-jet printing laser etching combined machining device according to claim 6, characterized in that, The jet printing laser etching composite machining device is used for jet printing laser etching composite machining, including the following steps: Step 1: clamp the workpiece (114) to be processed on the workbench of the concentric turntable (113), after clamping, start the machine tool driving box (41) and start the machine tool, adjust the workpiece to be processed 114 to the initial processing position, move the X-axis (21), Y-axis (22) and Z-axis (23) to move the electrojet printing laser composite module (3) to the initial processing position, and wait for processing; Step 2: import the model of the workpiece (114) to be processed and the frequency selective surface conformal pattern to be processed into the upper computer (47), lay the frequency selective surface conformal pattern array to be processed on the workpiece (114) to be processed in the upper computer (47), generate the processing path and the processing starting position and ending position; generate the numerical control G code path trajectory program through the industrial computer (44); Step 3: install the jet printing functional material into the liquid storage unit (311), the output port of the flow field controller (45) is connected to the storage pipe liquid storage unit (311), the output port of the electric field controller (46) is connected to the electric control board (317), and the jet printing module driving box is opened; the laser module driving box (43) is connected with the laser (321), the laser (321) is started, the observation camera (36), the measurement camera (37) and the laser range finder are started, and the corresponding camera observation window is opened in the upper computer (47); Step 4: start the inkjet laser etching combined machining control program in the host computer (47), execute the numerical control G code track program generated by the industrial computer (44), first the laser emitting unit (315) and the laser receiving unit (316) will carry out the ranging at the starting point, according to the ranging value, carry out the real-time compensation of height, according to the type of functional structure, by means of auxiliary X / Y axis (33) and auxiliary Z axis (34), carry out the inkjet and laser etching process according to the generated path; Step 5: the host computer (47) displays the current machining state in real time and records the defective position of the functional structure according to the real-time effect, so as to facilitate the secondary accurate repair; the industrial computer (44) controls the movement process of the electric inkjet module (31) and the laser etching module (32) according to the program, and processes different conformal functional structures on different curved surface workpieces.

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