Array structure silk-screen printing device facing complex curved surface and control method of array structure silk-screen printing device

Abstract

The invention provides a complex curved surface-oriented array structure silk-screen printing device and a control method thereof, and belongs to the technical field of advanced manufacturing. The printing device comprises a bed body module, a movement module, a silk-screen printing module and a control module, the posture position of a workpiece can be adjusted in the printing process, and the bed body module has five degrees of freedom and can adjust the posture of the workpiece in any curved surface shape. In the silk-screen printing process, the control module executes a professional numerical control G code program generated through path planning software, and the accuracy of the printing position can be guaranteed. The silk-screen printing equipment part moves a silk-screen printing module to a designated position to start printing on the basis of five-axis movement. Multi-material, high-precision, high-efficiency and damage-free manufacturing of the array structure can be realized, and the method has the characteristics of full-process automation, high forming speed, high efficiency and the like of silk-screen printing manufacturing, and has a good application prospect in the fields of precision machining, micro-nano machining and the like.

Description

Technical Field

[0001] The invention belongs to the field of advanced manufacturing technology and relates to an array structure screen printing device for complex curved surfaces and a control method thereof. Background Art

[0002] With the continuous advancement of science and technology, in order to meet the significant demand for product functional diversity, it is necessary to achieve high-precision, high-efficiency and surface conformal manufacturing of surface array structures, and promote the innovation and development of array structure manufacturing equipment and process methods.

[0003] At present, the processing technology of array structures mainly includes laser etching, chemical deposition, spraying and other technologies. However, there are some problems in the application of these process technologies on complex curved substrates. The laser etching process uses high-energy lasers during the processing, which will cause damage to the array structure substrate; chemical deposition is a process method with high precision for processing array structures, but this process requires expensive equipment, and it is difficult to achieve large-scale manufacturing of array structures on complex curved substrates; the printing process has high precision, but there is a problem of low efficiency in large-scale application.

[0004] Screen printing is a feasible solution to achieve high-precision, high-efficiency and surface conformal manufacturing on complex curved substrates. Screen printers are a type of printer that uses special screen printing. Screen printers equipped with high-precision orifice plates have broad application in the field of micro-nano precision manufacturing. They can perform high-efficiency and high-precision printing and manufacturing on flat substrates. However, screen printers are currently mainly used on flat surfaces. For complex curved substrates with different curvatures, there are problems with printed pattern distortion and inability to print on large areas.

[0005] In view of the problem that the current screen printing machines are difficult to apply to complex curved substrates, there is an urgent need to improve the current screen printing machines and develop high-precision and high-efficiency curved screen printing manufacturing devices and technologies for complex curved substrates, so as to achieve high-precision and high-efficiency large-area manufacturing of array structures on complex curved substrates. Summary of the invention

[0006] In order to meet the requirements of high precision, high efficiency, conformal, and damage-free manufacturing of curved substrate array structures, the present invention proposes a screen printing device for array structures on complex curved surfaces and a control method thereof, which realizes the requirements of high precision, high efficiency, conformal, and damage-free manufacturing of array structures through screen printing technology, combined with a five-axis motion machine tool and coordinated path planning software.

[0007] In order to achieve the above-mentioned purpose, some embodiments of the present application propose an array structure screen printing device for complex curved surfaces, which includes a bed module, a motion module, a screen printing module, and a control module. The bed module serves as the basic part, supporting the other three modules and the processed products; the motion module is fixed on the bed module, and under the control of the control module, it can complete the movement in the five degrees of freedom of X, Y, Z, B and C, and complete the posture adjustment for the complex curved surface; the screen printing module is fixed on the bed module, and the control module controls the motion module to move the screen printing module to the desired printing position, and screen prints the processed products; the control module can complete the control of the motion module and the screen printing module, so that they move in coordination to complete the processing of the processed products.

[0008] In some embodiments, the bed module includes a bed, a column, a slide, a saddle, and a support seat. The column is installed above the bed by bolts; the slide is installed on the X-axis slider on the upper surface of the column; the saddle is installed on the Y-axis linear guide; and the support seat is installed on the bed by bolts. The bed is the bearing foundation of the machine tool, which is provided for the installation of various components above the machine tool; the column and the support seat are the mounting supports of the B / C rotating axis, which play the role of fixing the B / C rotating axis; the slide is a bearing and sliding component, which determines the sliding of the X-axis and Y-axis, and bears the weight of the saddle and Z-axis; the saddle is the base for fixing the Z-axis, which plays a role of stability and sliding. The bed, column, slide, saddle, and support seat components are all processed by casting, and together form a complete bed structure, providing installation support for other functional parts.

[0009] In some embodiments, the motion module includes an X-axis, a Y-axis, a Z-axis, and a B / C rotation axis. The X-axis linear guide in the X-axis is fixed on the upper surface of the column, and the X-axis slider is fixed on the lower surface of the slide and cooperates with the X-axis linear guide to ensure smooth sliding; the Y-axis linear guide in the Y-axis is fixed on the lower surface of the saddle, and the Y-axis slider is fixed on the upper surface of the slide and cooperates with the Y-axis linear guide to ensure smooth sliding; the Z-axis linear guide in the Z-axis is fixed in front of the Z-axis slider, and the Z-axis slider is fixed on the front surface of the saddle and cooperates with the Z-axis linear guide to ensure smooth sliding; the B / C rotation axis is fixed to the column and to the support seat by bolts, and the bolts are used to connect the fixed turntable and the B / C rotation axis, and the workpiece is fixed on the turntable. The above axes can be linked to each other to achieve five degrees of freedom movement and realize posture adjustment of complex curved surfaces.

[0010] In some embodiments, the screen printing module includes a pneumatic linkage valve, a motion locker, a scraper locker, a tension valve, a spring buffer, a screen printing housing, a connecting plate, a scraper, a screen, a screen holder, a balance adjustment dial and a screw mechanism. The pneumatic linkage valve is fixed on the connecting plate and connected to the flow field controller, and the movement control of the scraper is completed by the pressure of the gas; the motion locker is fixed between the connecting plate and the screen printing shell by a bolt structure, and is used to lock and fix the connecting plate and the screen printing shell to prevent the connection from loosening when the scraper is working and affecting the work; the tension valve is embedded in the connecting plate as a whole, and the adjustment of the up and down movement of the scraper is completed by adjusting the tightness of the tension valve; the spring buffer is fixed on the connecting plate, and is used to buffer the vibration generated during work and improve the stability of the device during work; the scraper locker is fixed under the connecting plate and is connected to the scraper through a locking mechanism. The scraper locker can lock the scraper position by rotating clockwise, and can loosen the scraper and complete the replacement by rotating counterclockwise; the screen is installed and fixed in the screen holder, and is used to carry functional materials. The central area of ​​the screen is a mesh, and the material is an elastic pi film, which can be elastically deformed so that the mesh in the central area fits on the curved substrate to be printed, and the array structure material can be printed on the substrate to be printed through the mesh; the screen holder is fixed to the bottom of the screen printing shell by a bolt structure, which is used to complete the replacement and fixation of the screen, and the screen fixing device can install and disassemble the screen by tightening the bolt structure; the balance adjustment dial is fixed to the screen printing shell by a bolt structure, which can change the angle between the screen holder and the horizontal direction to complete the adjustment of the horizontality of the screen holder; the screw mechanism is fixed to the outside of the screen printing shell, and after receiving the signal sent by the host computer, it can drive the scraper to move along the screen. The above screen printing components are coordinated and cooperated through the industrial control computer to complete the electrofluid printing of functional materials.

[0011] In some embodiments, the control module includes a machine tool drive box, a screen printing module drive box, an industrial computer, a flow field controller, and a host computer. The machine tool drive box controls the X-axis, Y-axis, Z-axis, and B / C rotation axis to achieve movement, communicates with the industrial computer, and realizes direct control of the machine tool drive box by the host computer; the screen printing module drive box controls the parameter adjustment and motion control of the screen printing module, and communicates with the industrial computer to realize direct control of the host computer; the host computer is connected to the industrial computer to realize real-time display. The flow field controller is connected to the pneumatic linkage valve to realize the supply of driving force and communicate with the industrial computer. The above parts cooperate with each other to realize the screen printing manufacturing of the array structure.

[0012] Furthermore, the movement speed range of the X-axis, Y-axis and Z-axis is 0.42 m / min, and the movement stroke is 800 mm, 400 mm and 600 mm respectively; the B / C rotation axis can achieve 360-degree rotation to realize the posture adjustment of the complex curved surface substrate.

[0013] Some other embodiments of the present application provide a control method for the above array structure screen printing device for complex curved surfaces, comprising the following steps: Step 1: Fix the workpiece on the turntable workbench and determine the starting point, manufacturing size range and array structure type of the workpiece silk screen manufacturing.

[0014] Step 2: Import the workpiece model into the array structure paving and path planning software in the host computer, pave the array structure onto the workpiece surface, complete the path planning through teaching, and generate the CNC G code path trajectory program after post-processing by the industrial computer.

[0015] Step 3: Place the functional material on the screen of the screen printing module, start the generated CNC G code trajectory program, and make the motion module drive the screen printing module to the specified position.

[0016] Step 4: The host computer gives a signal to the lead screw mechanism of the screen printing module to drive the squeegee to move along the stencil. When it moves to the center of the stencil, the flow field controller controls the squeegee to move downward. The pressure of the squeegee on the stencil will cause the flat stencil to deform, thereby achieving conformity between the stencil and the curved substrate in the area. In this area, the functional material is printed on the curved substrate through the stencil to complete the printing of the functional mechanism in this area.

[0017] The material of the printed array structure includes conductive metal ink or conductive polymer.

[0018] The beneficial effects of the present invention include: First, the five-axis motion machine tool provided by the present invention can adjust the posture position of the workpiece during the printing process. Since it has five degrees of freedom, the posture of the workpiece with any curved surface shape can be adjusted. The screen printing device part moves the screen printing device to the specified position on the basis of the five-axis motion to start working and printing. Since the array structure has various sizes and shapes, the screen 119 can be replaced by tightening the bolt structure on the screen holder 1110, and the screen can be replaced according to the array structure type. Second, in order to achieve the requirements of conformal manufacturing, the screen adopts an elastic pi film to deform under pressure and fit the curved surface. In the process of screen printing, a professional CNC G code program is generated by path planning software to ensure the accuracy of the printing position. Third, the device and method described in the present invention have the advantages of reliable structure, fast manufacturing efficiency, high printing accuracy, and wide material applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of an array structure screen printing device for complex curved surfaces according to an embodiment of the present invention.

[0020] Figure 2 Schematic diagram of the installation position of the workpiece and the B / C rotating axis in the device according to an embodiment of the present invention.

[0021] Figure 3 Schematic diagram of the structure of the screen printing module in the device according to the embodiment of the present invention.

[0022] Figure 4 Schematic side view of the structure of the screen printing module in the device according to an embodiment of the present invention.

[0023] Figure 5 Schematic diagram of the installation positions of the X-axis, Y-axis, and Z-axis sliders and linear guide rails in an apparatus according to an embodiment of the present invention.

[0024] In the figure: 1 bed; 2 machine tool drive box; 3 screen printing module drive box; 4 industrial computer; 5 flow field controller; 6 host computer; 7Y axis; 8 slide seat; 9 saddle seat; 10 Z axis; 11 screen printing module; 12 X axis; 13 column; 14 B / C rotating axis; 15 support seat; 71 Y axis slider; 72 Y axis linear guide; 101 Z axis slider; 102 Z axis linear guide; 111 pneumatic linkage valve; 112 motion locker; 113 ink scraper locker; 114 tension valve; 115 spring buffer; 116 screen printing housing; 117 connecting plate; 118 ink scraper; 119 screen; 1110 screen holder; 1111 balance adjustment dial; 1112 screw mechanism; 121 X axis linear guide; 122 X axis slider; 143 turntable workbench; 144 workpiece. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the specific implementation modes of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] In general, the array structure screen printing device for complex curved surfaces proposed in the present application includes a bed module, a motion module, a screen printing module and a control module; the bed module carries the motion module, the screen printing module and the control module; the bed module also carries a workpiece. The motion module is fixed on the bed module, and moves in five degrees of freedom of X, Y, Z, B and C under the control of the control module to complete the posture adjustment for the complex curved surface; wherein the screen printing module is fixed on the bed module, and the control module controls the motion module so that the screen printing module reaches the desired printing position to perform screen printing on the workpiece; wherein the screen printing module includes a screen, a screen holder and a screen printing housing, and the screen is fixedly installed in the screen holder for carrying functional materials; the screen holder is fixed under the screen printing housing for completing the replacement and fixing of the screen; the control module is configured to control the motion module and the screen printing module to complete the processing of the workpiece.

[0027] Among them, the X degree of freedom is the linear motion based on the X axis, the Y degree of freedom is the linear motion based on the Y axis, the Z degree of freedom is the linear motion based on the Z axis, the B degree of freedom is the rotational motion around the Y axis, and the C degree of freedom is the rotational motion around the Z axis.

[0028] In the present application, the X-axis, Y-axis, and Z-axis B / C rotation axes refer to motion mechanisms in corresponding directions, respectively, wherein the X, Y, Z, B, and C directions are the directions represented by the coordinate systems in the accompanying drawings, respectively. The X-axis may refer to an X-axis motion module, which may include an X-axis drive unit, an X-axis linear guide, and an X-axis slider, wherein the X-axis drive unit may include, for example, an X-axis servo motor, an X-axis lead screw, and an X-axis nut; the Y-axis may refer to a Y-axis motion module, which may include a Y-axis drive unit, a Y-axis linear guide, and a Y-axis slider, wherein the Y-axis drive unit may include, for example, a Y-axis servo motor, a Y-axis lead screw, and a Y-axis nut; the Z-axis may refer to a Z-axis motion module, which may include a Z-axis drive unit, a Z-axis linear guide, and a Z-axis slider, wherein the Z-axis drive unit may include, for example, a Z-axis servo motor, a Z-axis lead screw, and a Z-axis nut. The B / C rotary axis can be a composite structure of the B axis and the C axis, wherein the B axis motion module can include a B axis rotary table; a B axis servo motor, a B axis encoder, a B axis reducer, etc.; the C axis motion module can include a C axis rotary spindle; a C axis servo motor, a C axis encoder, a C axis reducer, etc. Similarly, the auxiliary X / Y axis refers to a composite motion module in the X / Y direction, which also includes a drive unit, a guide rail, and a slider; the auxiliary Z axis is a motion module in the Z direction, which also includes a drive unit, a guide rail, and a slider; the auxiliary U axis is a motion module in the direction parallel to the X axis, which also includes a drive unit, a guide rail, and a slider.

[0029] like Figure 1 , Figure 5As shown, the bed module is composed of four parts, namely the bed 1, the column 13, the slide 8 and the saddle 9. From the installation position, from bottom to top, the bed 1, the column 13, the slide 8 and the saddle 9 form the supporting skeleton of the machine tool module. The above components can all be processed by casting technology, which determines the stability and precision of the machine tool module. In addition, the installation positions of the X-axis 12, Y-axis 7, Z-axis 10 and B / C rotating axis 14 of the motion module are reserved at the corresponding parts of these components, wherein the bed 1 is at the bottom, the column 13 is installed above the bed 1 through bolts 145, and the column 13 is connected to the slide 8 through the slider 122 of the X-axis 12 and is located below the slide 8; the slide 8, as a bearing and sliding component, controls the sliding of the X-axis 12 and the Y-axis 7, and bears the weight of the saddle 9 and the Z-axis 10; the saddle 9 is installed on the Y-axis linear guide 72, and the saddle 9 is connected to the slide 8 through the Y-axis 7 and is located above the slide 8, the Z-axis 10 is located on the front surface of the saddle 9 and carries the screen printing module 11 through the support plate 119, and the saddle 9 serves as a base for fixing the Z-axis 10, playing a role of stability and sliding. The B / C rotating axis 14 is installed on the column 13 and the support seat 15. The machine tool drive box 2 is respectively connected to the X-axis 12, Y-axis 7, Z-axis 10, and B / C rotating axis 14 to realize the power supply and motion control of the motor modules of each axis. Through the linkage cooperation among the five axes, the five-degree-of-freedom processing of the machine tool is realized, solving the device problem of conformal manufacturing of complex curved surface array structures.

[0030] The bed module further includes a support base 15 ; the support base 15 is installed on the bed 1 ; the column 13 and the support base 15 serve as mounting supports for the B / C rotating shaft 14 .

[0031] The motion module includes an X-axis 12, a Y-axis 7, a Z-axis 10, and a B / C rotating axis 14; the X-axis linear guide 121 in the X-axis 12 is fixed on the upper surface of the column 13, and the X-axis slider 122 is fixed on the lower surface of the slide 8 and cooperates with the X-axis linear guide 121 to ensure smooth sliding; the Y-axis linear guide 72 in the Y-axis 7 is fixed on the lower surface of the saddle 9, and the Y-axis slider 71 is fixed on the upper surface of the slide 8 and cooperates with the Y-axis linear guide 72 to ensure smooth sliding; the Z-axis linear guide 102 in the Z-axis 10 is fixed in front of the Z-axis slider 101, and the Z-axis slider 101 is fixed on the front surface of the saddle 9 and cooperates with the Z-axis linear guide 102 to ensure smooth sliding; the B / C rotating axis 14 is connected to the fixed turntable workbench 143, and the workpiece 144 is fixed on the turntable workbench 143; the above axes can be linked to each other to achieve five degrees of freedom movement and realize the posture adjustment of complex curved surfaces.

[0032] like Figure 3 as well as Figure 4As shown, the screen printing module 11 includes a pneumatic linkage valve 111, a motion locker 112, a scraper locker 113, a tension valve 114, a spring buffer 115, a screen printing housing 116, a connecting plate 117, a scraper 118, a screen 119, a screen holder 1110, a balance adjustment dial 1111 and a screw mechanism 1112; the pneumatic linkage valve 111 is fixed on the connecting plate 117 and connected to the flow field controller 5, and the movement control of the scraper 118 is completed by the pressure of the gas; the motion locker 112 is fixed between the connecting plate 117 and the screen printing housing 116, and is used to Prevent the ink scraper 118 from loosening when working; the tension valve 114 is embedded in the connecting plate 117 as a whole, and the adjustment of the up and down movement of the ink scraper 118 is completed by adjusting the tightness of the tension valve 114; the spring buffer 115 is fixed on the connecting plate 117, used to buffer the vibration generated during work and improve stability; the ink scraper locker 113 is fixed under the connecting plate 117, and is connected to the ink scraper 118 through a locking mechanism. The ink scraper locker 113 rotates clockwise to lock the position of the ink scraper 118, and rotates counterclockwise to loosen the ink scraper 118 and complete the replacement. The screen printing module 11 is not only an important component of the overall device, but also determines the quality of the array structure.The pneumatic linkage valve 111 is fixed on the connecting plate 117 and connected to the flow field controller 5, and the movement of the ink scraper 118 is controlled by the pressure of the gas; the motion locker 112 is fixed between the connecting plate 117 and the screen printing housing 116 by a bolt structure, and is used to lock and fix the connecting plate 117 and the screen printing housing 116 to prevent the connection from being loosened when the ink scraper 118 is working and affecting the work; the tension valve 114 is integrally embedded in the connecting plate 117, and the adjustment of the up and down movement of the ink scraper 118 is completed by adjusting the tightness of the tension valve 114; the spring buffer 115 is fixed on the connecting plate 117, and is used to buffer the vibration generated during work and improve the stability of the device during work; the ink scraper locker 113 is fixed under the connecting plate 117, and is connected to the ink scraper through the locking mechanism and the ink scraper. The ink blade 118 is connected to the ink blade 118, and the ink blade locker 113 rotates clockwise to lock the position of the ink blade 118, and rotates counterclockwise to loosen the ink blade 118 and complete the replacement; the screen 119 is installed and fixed in the screen holder 1110, which is used to carry functional materials; the screen holder 1110 is fixed to the bottom of the screen printing housing 116 by a bolt structure, which is used to complete the replacement and fixation of the screen 119; the balance adjustment dial 1111 is fixed to the screen printing housing 116 by a bolt structure, which can change the angle between the screen holder 1110 and the horizontal direction to complete the adjustment of the horizontal degree of the screen holder 1110; the lead screw mechanism 1112 is fixed to the outside of the screen printing housing 116, and after receiving the signal sent by the host computer 6, it can drive the ink blade 118 to move along the screen 119. The above screen printing components are coordinated and cooperated through the industrial control computer 4 to complete the electrofluid printing of functional materials.

[0033] The central area of ​​the screen 119 is a mesh, and the material of the screen 119 is an elastic PI film, so that it can undergo elastic deformation to make the mesh in the central area fit on the curved surface substrate to be printed, and the array structure material can be printed on the curved surface substrate to be printed through the mesh; the screen fixture 1110 is fixed to the bottom of the screen printing housing 116 by a bolt structure, which is used to complete the replacement and fixation of the screen 119, and the screen fixing device 1110 installs and removes the screen 119 by tightening the bolt structure; the balance adjustment dial 1111 is fixed on the screen printing housing 116, which changes the angle between the screen fixture 1110 and the horizontal direction, thereby completing the adjustment of the horizontality of the screen fixture 1110; the screw mechanism 1112 is fixed to the outside of the screen printing housing 116, and after receiving the signal sent by the host computer 6, it can drive the scraper 118 to move along the screen 119.

[0034] The control module includes a machine tool drive box 2, a screen printing module drive box 3, an industrial computer 4, a flow field controller 5 and a host computer 6; the machine tool drive box 2 controls the X-axis 12, Y-axis 7, Z-axis 10 and B / C rotation axis 14 of the motion module to realize movement, and communicates with the industrial computer 4 to realize direct control of the machine tool drive box 2 by the host computer 6; the screen printing module drive box 3 controls the parameter adjustment and motion control of the screen printing module, and communicates with the industrial computer 4 to realize direct control of the host computer 6; the host computer 6 is connected to the industrial computer 4 to realize real-time display; the flow field controller 5 is connected to the pneumatic linkage valve 111 to realize the supply of driving force, and communicates with the industrial computer 4; the above parts cooperate with each other to realize the screen printing manufacturing of the array structure.

[0035] The bed 1, column 13, slide 8, saddle 9, and support seat 15 components are all processed by casting, and together form a complete bed module to provide installation support for other functional parts.

[0036] The movement speed range of the X-axis 12, the Y-axis 7, and the Z-axis 10 can be 0-42 m / min; the B / C rotation axis 14 can achieve 360-degree rotation to achieve posture adjustment of a complex curved surface substrate.

[0037] The control method of the device of the present invention is as follows: Figure 2As shown, the workpiece 144 is fixed on the turntable workbench 143, the starting point and manufacturing size range of the workpiece 144 for screen printing manufacturing, and the array structure type are determined, the workpiece 144 model is imported into the array structure paving and path planning software in the host computer 6, and the array structure is paved on the surface of the workpiece 144. The path planning is completed by the software, and the CNC G code path trajectory program is generated after the industrial computer completes the post-processing. Before the screen printing device starts working, the designed screen 119 is installed on the screen holder 1110, the motion locker 112 is loosened, and the connecting plate 117 is partially opened upward, and then the ink scraper locker 113 is adjusted to complete the installation of the ink scraper 118. The balance adjustment dial 1111 is adjusted to make the screen 119 in a horizontal position, and then an appropriate amount of functional material is evenly placed in the center of the mesh of the screen 119. The connecting plate 117 is adjusted to the working position, and the motion locker 112 is locked. Then, by adjusting the tension valve 114, the scraper 118 is moved up and down to the appropriate position, the flow field controller 5 is connected to the air pressure linkage valve 111, the functional material is placed on the screen 119 of the screen printing module 11, and the generated CNC G code trajectory program is started, so that the motion module drives the screen printing module 11 to move to the specified position, and the upper computer 6 gives a signal to control the screw mechanism 1112 of the screen printing module 11 to drive the scraper 118 to move along the screen 119. When it moves to the center position of the screen, the flow field controller 5 is connected to the air pressure linkage valve 111 to apply pressure to the scraper 118 to move it downward. The pressure of the scraper 118 on the screen will cause the flat screen 119 to deform, thereby achieving conformal conformity between the screen 119 and the curved substrate of the workpiece 144 in the area. In this area, the functional material is printed on the curved substrate through the screen 119 to complete the array structure printing in this area.

[0038] The present invention is not limited to this embodiment, and any equivalent concepts or changes within the technical scope disclosed by the present invention are included in the protection scope of the present invention.

[0039] In this embodiment, the material of the printed array structure is a conductive polymer. In other embodiments, the material of the printed array structure is a conductive metal ink.

[0040] In summary, the present invention provides a device and method for manufacturing complex curved array structures by electrofluid screen printing, which solves the problems of expensive equipment, poor manufacturing quality, low manufacturing efficiency, and non-conformability in the current manufacturing process of complex curved array structures. The proposed device and method for manufacturing complex curved array structures by screen printing innovatively designs a special machine tool for screen printing of complex curved substrates. Through the coordination of five-axis motion posture adjustment and multi-functional printing modules, it can realize multi-material, high-precision, high-efficiency, and non-destructive manufacturing of array structures. It has the characteristics of full-process automation of screen printing manufacturing, fast molding, and high efficiency, and has good application prospects in the fields of precision machining, micro-nano machining, etc.

[0041] The above-described embodiments merely express the implementation methods of the present invention, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A screen printing device for array structures facing complex curved surfaces, characterized in that: It includes bed module, motion module, screen printing module and control module; The bed module carries the motion module, the screen printing module, the control module, and the workpiece; The motion module is fixed on the bed module and moves in five degrees of freedom under the control of the control module to complete the posture adjustment for the complex curved surface; wherein The screen printing module is fixed on the bed module, and the control module controls the motion module so that the screen printing module reaches a desired printing position to perform screen printing on the workpiece; wherein the screen printing module comprises a screen plate (119), a screen plate holder (1110) and a screen printing housing (116); the screen plate (119) is fixedly installed in the screen plate holder (1110) for carrying functional materials; the screen plate holder (1110) is fixed below the screen printing housing (116) for completing the replacement and fixing of the screen plate (119); The control module is configured to control the motion module and the screen printing module to complete the processing of the workpiece.

2. The array structure screen printing device for complex curved surfaces according to claim 1, characterized in that: The bed module comprises a bed (1), a column (13), a slide (8), a saddle (9) and a support seat (15); the column (13) is mounted above the bed (1); the slide (8) is mounted on an X-axis slider (122) on the upper surface of the column (13); the saddle (9) is mounted on a Y-axis linear guide (72); the support seat (15) is mounted on the bed (1); the column (13) and the support seat (15) serve as mounting supports for the B / C rotating axis (14); the slide (8) serves as a bearing and sliding component to control the sliding of the X-axis (12) and the Y-axis (7), and at the same time bears the weight of the saddle (9) and the Z-axis (10); the saddle (9) serves as a base for fixing the Z-axis (10).

3. The array structure screen printing device for complex curved surfaces according to claim 1, characterized in that: The motion module comprises an X-axis (12), a Y-axis (7), a Z-axis (10), and a B / C rotation axis (14); the X-axis linear guide rail (121) in the X-axis (12) is fixed on the upper surface of the column (13), the X-axis slider (122) is fixed on the lower surface of the slide seat (8) and cooperates with the X-axis linear guide rail (121) to ensure smooth sliding; the Y-axis linear guide rail (72) in the Y-axis (7) is fixed on the lower surface of the saddle seat (9), and the Y-axis slider (71) is fixed on the The upper surface of the slide seat (8) cooperates with the Y-axis linear guide (72) to ensure smooth sliding; the Z-axis linear guide (102) in the Z-axis (10) is fixed in front of the Z-axis slider (101), and the Z-axis slider (101) is fixed on the front surface of the saddle seat (9) and cooperates with the Z-axis linear guide (102) to ensure smooth sliding; the B / C rotating shaft (14) is connected to the fixed turntable worktable (143), and the workpiece (144) is fixed on the turntable worktable (143).

4. The array structure screen printing device for complex curved surfaces according to claim 1, characterized in that: The screen printing module (11) comprises a pneumatic linkage valve (111), a motion locker (112), a scraper blade locker (113), a tension valve (114), a spring buffer (115), a screen printing housing (116), a connecting plate (117), a scraper blade (118), a screen plate (119), a screen plate holder (1110), a balance adjustment dial (1111) and a screw mechanism (1112); the pneumatic linkage valve (111) is fixed on the connecting plate (117) and connected to the flow field controller (5), and the movement of the scraper blade (118) is controlled by gas pressure; the motion locker (112) is fixed on the connecting plate (117) and the screen printing housing (11 6), for preventing the ink scraper (118) from loosening when it is working; the tension valve (114) is integrally embedded in the connecting plate (117), and the adjustment of the up and down movement of the ink scraper (118) is completed by adjusting the tightness of the tension valve (114); the spring buffer (115) is fixed on the connecting plate (117), and is used to buffer the vibration generated during operation to improve stability; the ink scraper locker (113) is fixed under the connecting plate (117), and is connected to the ink scraper (118) through a locking mechanism. The ink scraper locker (113) is rotated clockwise to lock the position of the ink scraper (118), and is rotated counterclockwise to loosen the ink scraper (118) and complete replacement.

5. The array structure screen printing device for complex curved surfaces according to claim 1, characterized in that: The central area of ​​the screen (119) is a mesh, and the material of the screen (119) is an elastic PI film so that elastic deformation occurs so that the mesh in the central area fits on the curved surface substrate to be printed, and the array structure material is printed onto the curved surface substrate to be printed through the mesh. The screen fixture (1110) is fixed to the bottom of the screen printing housing (116) by a bolt structure, and is used to complete the replacement and fixation of the screen (119). The screen fixing device (1110) is fixed by screws. The screen (119) is installed and removed by adjusting the tightness of the bolt structure; the balance adjustment dial (1111) is fixed on the screen printing housing (116) to change the angle between the screen holder (1110) and the horizontal direction, thereby completing the adjustment of the horizontality of the screen holder (1110); the lead screw mechanism (1112) is fixed on the outside of the screen printing housing (116) and drives the scraper (118) to move along the screen (119) after receiving the signal sent by the host computer (6).

6. The array structure screen printing device for complex curved surfaces according to claim 1, characterized in that: The control module comprises a machine tool drive box (2), a screen printing module drive box (3), an industrial computer (4), a flow field controller (5) and a host computer (6); the machine tool drive box (2) controls an X-axis (12), a Y-axis (7), a Z-axis (10) and a B / C rotation axis (14) to achieve movement, communicates with the industrial computer (4) and achieves direct control of the machine tool drive box (2) by the host computer (6); the screen printing module drive box (3) controls parameter adjustment and motion control of the screen printing module, communicates with the industrial computer (4) and achieves direct control of the host computer (6); the host computer (6) is connected to the industrial computer (4) to achieve real-time display; the flow field controller (5) is connected to a pneumatic linkage valve (111) to achieve the supply of driving force, and communicates with the industrial computer (4) to achieve screen printing manufacturing of an array structure.

7. The array structure screen printing device for complex curved surfaces according to claim 2, characterized in that: The bed (1), the column (13), the slide seat (8), the saddle seat (9), and the support seat (15) are all processed by casting.

8. The array structure screen printing device for complex curved surfaces according to claim 2, characterized in that: The movement speed range of the X-axis (12), Y-axis (7), and Z-axis (10) is 0-42 m / min; the B / C rotation axis (14) can achieve 360-degree rotation, thereby achieving posture adjustment of a complex curved surface substrate.

9. The control method of the array structure screen printing device for complex curved surfaces according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: fix the workpiece (144) on the turntable workbench (143), and determine the starting point, manufacturing size range, and array structure type of the silk screen manufacturing of the workpiece (144); Step 2: Importing the model of the workpiece (144) into the array structure paving and path planning software in the host computer (6), paving the array structure on the surface of the workpiece (144), completing the path planning, and generating a numerical control G code path trajectory program after completion of the post-processing by the industrial control computer (4); Step 3: placing the functional material on the screen plate (119) of the screen printing module (11), starting the generated numerical control G code trajectory program, and causing the motion module to drive the screen printing module (11) to a specified position; Step 4: The upper computer (6) sends a signal to cause the lead screw mechanism (1112) of the screen printing module (11) to drive the scraper (118) to move along the screen (119). When the scraper moves to the center of the screen (119), the flow field controller (5) controls the scraper (118) to move downward; the pressure exerted by the scraper (118) on the screen (119) causes the flat screen to deform, thereby achieving conformality between the screen and the curved substrate in the area; in this area, the functional material is printed on the curved substrate through the screen to complete the printing of the functional mechanism in this area.

10. The control method of the array structure screen printing device for complex curved surfaces according to claim 9, characterized in that: The material of the printed array structure includes conductive metal ink or conductive polymer.

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