Array structure screen printing device for complex curved surface and control method thereof

Abstract

The application provides an array structure screen printing device for complex curved surfaces and a control method thereof, and belongs to the field of advanced manufacturing technology.The printing device comprises a bed body module, a motion module, a screen printing module and a control module, and the attitude position of a workpiece can be adjusted during printing.The bed body module has five degrees of freedom and can adjust the attitude of any curved workpiece.During screen printing, the control module executes a professional numerical control G code program generated by path planning software, which can ensure the accuracy of the printing position.The screen printing equipment part moves the screen printing module to a specified position to start work and printing based on five-axis motion.The application can realize array structure multi-material, high-precision, high-efficiency and non-damage manufacturing, has the characteristics of screen printing manufacturing full-process automation, rapid forming, high efficiency and the like, and has good application prospects in the fields of precision machining and micro-nano machining.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of advanced manufacturing technology, and relates to a complex curved surface-oriented array structure screen printing device and a control method thereof. BACKGROUND

[0002] With the continuous progress of science and technology, in order to meet the major needs of product function diversity, it is necessary to realize high-precision, high-efficiency and conformal manufacturing of surface array structures, and to promote the innovation and development of array structure manufacturing devices and process methods.

[0003] At present, the processing technology of array structure mainly includes laser etching, chemical deposition and spraying technology. However, these process technologies have some problems in the application on complex curved surface substrate. Laser etching process will cause damage to array structure substrate due to the use of high-energy laser in the process of processing; chemical deposition is a process method with high precision for processing array structure, but this process needs expensive equipment, and it is difficult to realize large-area manufacturing of array structure on complex curved surface substrate; spraying process has high precision, but there is a problem of low efficiency in large-area application.

[0004] Screen printing is a feasible scheme for realizing high-precision, high-efficiency and conformal manufacturing on complex curved surface substrate. Screen printing machine is a kind of printing machine for printing by special screen, and the screen printing machine with high-precision hole plate has wide application space in the field of micro-nano precision manufacturing, and can realize high-efficiency and high-precision printing manufacturing on plane substrate. However, at present, screen printing machine is mainly applied to plane, and for complex curved surface substrate with different curvatures, there are problems of printing pattern distortion and inability to large-area printing.

[0005] In view of the problem that the screen printing machine at present stage is difficult to be applied to complex curved surface substrate, it is urgent to improve the screen printing machine at present stage, and to develop high-precision, high-efficiency and conformal screen printing manufacturing device and technology for complex curved surface substrate, so as to realize high-precision, high-efficiency and large-area manufacturing of array structure on complex curved surface substrate. SUMMARY

[0006] In order to solve the requirements of high-precision, high-efficiency, conformality and non-damage for array structure manufacturing on curved surface substrate, the application proposes a complex curved surface-oriented array structure screen printing device and a control method thereof, which realizes the requirements of high-precision, high-efficiency, conformality and non-damage for array structure manufacturing by combining screen printing technology, five-axis motion machine tool and path planning software.

[0007] To achieve the above object, some embodiments of the present application propose a screen printing device for complex curved surfaces, which comprises a bed module, a motion module, a screen printing module and a control module. The bed module serves as a basic part, supports the other three modules and carries the processed product; the motion module is fixed on the bed module and can move in five degrees of freedom, i.e. X, Y, Z, B and C, under the control of the control module to adjust the posture for the complex curved surface; the screen printing module is fixed on the bed module and is controlled by the control module to move to the desired printing position to print the processed product; and the control module controls the motion module and the screen printing module to move in coordination to process the product.

[0008] In some embodiments, the bed module comprises a bed body, a column, a slide, a saddle and a support seat. The column is bolted to the top of the bed body; 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 rail; and the support seat is bolted to the bed body. The bed body is the carrying base of the machine tool and provides installation space for the components above; the column and the support seat are the mounting seats of the B / C rotating shaft and serve to fix the B / C rotating shaft; the slide is a carrying and sliding component that determines the sliding of the X-axis and the Y-axis and carries the saddle and the Z-axis weight; and the saddle is the base of the Z-axis and serves to stabilize and slide. The bed body, the column, the slide, the saddle and the support seat are processed by casting and together form the complete bed structure to provide installation support for other functional parts.

[0009] In some embodiments, the motion module comprises an X-axis, a Y-axis, a Z-axis and a B / C rotating shaft. The X-axis linear guide rail 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 rail to ensure smooth sliding; the Y-axis linear guide rail 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 rail to ensure smooth sliding; the Z-axis linear guide rail in the Z-axis is fixed on the 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 rail to ensure smooth sliding; and the B / C rotating shaft is bolted to the column and the support seat, and the bolts are used to connect the rotating disc and the B / C rotating shaft, and the workpiece is fixed on the rotating disc. The above axes can be linked to each other to achieve five degrees of freedom movement and realize the posture adjustment of the complex curved surface.

[0010] In some embodiments, the screen printing module includes a pneumatic linkage valve, a motion lock, an ink blade lock, a tension valve, a spring buffer, a screen printing housing, a connecting plate, an ink blade, a screen plate, a screen plate holder, a balance adjustment dial, and a lead screw mechanism. The pneumatic linkage valve is fixed on the connecting plate and connected with the flow field controller to complete the movement control of the ink blade through the pressure of the gas; the motion lock is fixed between the connecting plate and the screen printing housing by a bolt structure to lock and fix the connecting plate and the screen printing housing, preventing the connection from loosening and affecting the work of the ink blade; the tension valve is embedded in the connecting plate to complete the adjustment of the up and down movement of the ink blade by adjusting the tension of the tension valve; the spring buffer is fixed on the connecting plate to buffer the vibration generated during work and improve the stability of the device during work; the ink blade lock is fixed below the connecting plate and connected with the ink blade through the locking mechanism. Clockwise rotation of the ink blade lock locks the position of the ink blade, and counterclockwise rotation releases the ink blade and completes the replacement; the screen plate is installed and fixed in the screen plate holder to carry functional materials. The center area of the screen plate is a mesh, and the material is an elastic pi film that can be elastically deformed to fit the mesh in the center area to the curved substrate to be printed, and the array structure material can be printed to the substrate to be printed through the mesh; the screen plate holder is fixed below the screen printing housing by a bolt structure to complete the replacement and fixation of the screen plate. The screen plate holder can be installed and removed by adjusting the tension of the bolt structure; the balance adjustment dial is fixed on the screen printing housing by a bolt structure. It can change the angle between the screen plate holder and the horizontal direction to adjust the levelness of the screen plate holder; the lead screw mechanism is fixed outside the screen printing housing and can drive the ink blade to move along the screen plate after receiving the signal sent by the upper computer. The above screen printing components are coordinated by the industrial computer to complete the electrohydrodynamic 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 an upper computer. The machine tool drive box controls the X-axis, Y-axis, Z-axis, and B / C rotation axis to realize movement, communicates with the industrial computer, and realizes the direct control of the upper computer on the machine tool drive box; the screen printing module drive box controls the parameter adjustment and movement control of the screen printing module, and communicates with the industrial computer to realize the direct control of the upper computer; the upper computer is connected with the industrial computer to realize real-time display. The flow field controller is connected with the pneumatic linkage valve to realize the supply of driving force and communicates with the industrial computer. The above parts are coordinated to realize the screen printing manufacturing of array structure.

[0012] Further, the movement speed range of the X-axis, Y-axis, and Z-axis is 042 m / min, and the movement stroke is 800 mm, 400 mm, and 600 mm respectively; the B / C rotating shaft can realize 360-degree rotation, and realize the attitude adjustment of the complex curved surface base body.

[0013] Some other embodiments of the present application propose a control method of the above-mentioned array structure screen printing device for complex curved surfaces, comprising the following steps:

[0014] Step 1: fix the workpiece on the rotary table, determine the starting point of screen printing manufacturing, the manufacturing size range, and the array structure type.

[0015] Step 2: import the workpiece model into the array structure paving and path planning software in the upper computer, pave the array structure on the workpiece surface, complete the path planning through teaching, and generate the numerical control G code path trajectory program through the post-processing of the industrial computer.

[0016] Step 3: place the functional material on the screen plate of the screen printing module, start the generated numerical control G code trajectory program, and make the motion module drive the screen printing module to the specified position.

[0017] Step 4: the upper computer gives a signal to make the lead screw mechanism of the screen printing module drive the squeegee to move along the screen plate, and when the squeegee moves to the center position of the screen plate, the flow field controller controls the squeegee to move downward. The pressure of the squeegee acting on the screen plate will cause the deformation of the planar screen plate, so as to realize the conformal printing of the screen plate and the curved surface substrate in the region. In this region, the functional material is printed on the curved surface substrate through the screen plate, and the printing of the functional mechanism in this region is completed.

[0018] The material of the printed array structure includes conductive metal ink or conductive polymer.

[0019] The beneficial effects of the present application include: first, the five-axis motion machine tool provided by the present application can adjust the attitude position of the workpiece during printing. Since it has five degrees of freedom, it can adjust the attitude of any curved surface workpiece. The screen printing device part moves 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 plate 119 can be replaced by adjusting the tightness of the bolt structure on the screen plate fixator 1110. The screen plate can be replaced according to the type of array structure. Second, in order to realize the requirement of conformal manufacturing, the screen plate adopts an elastic pi film which deforms under pressure and conforms to the curved surface. In the process of screen printing, the professional numerical control G code program is generated through the path planning software, which ensures the accuracy of the printing position. Third, the device and method have the advantages of reliable structure, fast manufacturing efficiency, high printing precision, wide material applicability, etc. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Schematic diagram of array structure screen printing device for complex curved surface according to embodiments of the present application.

[0021] Figure 2 Schematic diagram of installation position of workpiece and B / C rotating shaft in device according to embodiments of the present application.

[0022] Figure 3 Schematic diagram of structure of screen printing module in device according to embodiments of the present application.

[0023] Figure 4 Schematic diagram of structure of screen printing module in device according to embodiments of the present application.

[0024] Figure 5 Schematic diagram of installation position of X-axis, Y-axis, Z-axis slider and linear guide rail in device according to embodiments of the present application.

[0025] In the figure: 1 bed; 2 machine tool driving box; 3 screen printing module driving box; 4 industrial computer; 5 flow field controller; 6 upper computer; 7 Y-axis; 8 sliding seat; 9 saddle; 10 Z-axis; 11 screen printing module; 12 X-axis; 13 column; 14 B / C rotating shaft; 15 support seat; 71 Y-axis slider; 72 Y-axis linear guide rail; 101 Z-axis slider; 102 Z-axis linear guide rail; 111 pneumatic linkage valve; 112 movement locking device; 113 squeegee locking device; 114 tension valve; 115 spring buffer; 116 screen printing shell; 117 connecting flat plate; 118 squeegee; 119 screen plate; 1110 screen plate fixer; 1111 balance adjustment dial; 1112 screw mechanism; 121 X-axis linear guide rail; 122 X-axis slider; 143 rotating disc workbench; 144 workpiece. DETAILED DESCRIPTION

[0026] 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.

[0027] Overall, the array structure screen printing device for complex curved surface provided in the present application comprises a bed body module, a motion module, a screen printing module and a control module; the bed body module carries the motion module, the screen printing module and the control module; the bed body module also carries a workpiece. The motion module is fixed on the bed body 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 attitude adjustment for the complex curved surface; wherein the screen printing module is fixed on the bed body module, and the screen printing module reaches the desired printing position through the control of the control module on the motion module, so as to perform screen printing on the workpiece; wherein the screen printing module comprises a screen plate, a screen plate fixer and a screen printing shell, the screen plate is fixedly installed in the screen plate fixer for carrying functional materials; the screen plate fixer is fixed below the screen printing shell for completing the replacement and fixation of the screen plate; the control module is configured to control the motion module and the screen printing module to complete the processing of the workpiece.

[0028] Among them, the X degree of freedom is a linear motion based on the X axis, the Y degree of freedom is a linear motion based on the Y axis, the Z degree of freedom is a linear motion based on the Z axis, the B degree of freedom is a rotary motion around the Y axis, and the C degree of freedom is a rotary motion around the Z axis.

[0029] In the present application, the X axis, the Y axis, the Z axis and the B / C rotation axis respectively refer to the motion mechanism in the corresponding direction, wherein the X, Y, Z, B and C directions are respectively the directions represented by the coordinate system in the drawing. The X axis can refer to the X axis motion module, which can include an X axis driving unit, an X axis linear guide rail and an X axis sliding block, wherein the X axis driving unit includes, for example, an X axis servo motor, an X axis screw and an X axis nut; the Y axis can refer to the Y axis motion module, which can include a Y axis driving unit, a Y axis linear guide rail and a Y axis sliding block, wherein the Y axis driving unit includes, for example, a Y axis servo motor, a Y axis screw and a Y axis nut; the Z axis can refer to the Z axis motion module, which can include a Z axis driving unit, a Z axis linear guide rail and a Z axis sliding block, wherein the Z axis driving unit includes, for example, a Z axis servo motor, a Z axis screw and a Z axis nut. The B / C rotation 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 workbench, a B axis servo motor, a B axis encoder, a B axis reducer and the like; 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 and the like. Similarly, the auxiliary X / Y axis refers to the X / Y direction composite motion module, which also includes a driving unit, a guide rail and a sliding block; the auxiliary Z axis refers to the Z direction motion module, which also includes a driving unit, a guide rail and a sliding block; the auxiliary U axis refers to the X axis parallel direction motion module, which also includes a driving unit, a guide rail and a sliding block.

[0030] As Figure 1 , Figure 5As shown, the bed body module is composed of four parts, namely the bed body 1, the column 13, the slide 8 and the saddle 9. From the installation position, the bed body 1, the column 13, the slide 8 and the saddle 9 are sequentially arranged from bottom to top to form the support framework of the machine tool module. The above components can be all processed by casting process, which determines the stability and precision of the machine tool module. In addition, the installation positions of the X-axis 12, the Y-axis 7, the Z-axis 10 and the B / C rotating shaft 14 of the motion module are reserved at the corresponding positions of these components. Among them, the bed body 1 is at the bottom, the column 13 is installed on the bed body 1 by the bolt 145, the column 13 is connected with the slide 8 by the X-axis sliding block 122 and is located below the slide 8; the slide 8 controls the sliding of the X-axis 12 and the Y-axis 7 as the bearing and sliding component, and at the same time bears the weight of the saddle 9 and the Z-axis 10; the saddle 9 is installed on the Y-axis linear guide rail 72, the saddle 9 is connected with the slide 8 by 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 bears the silk printing module 11 through the supporting plate 119, the saddle 9 serves as the base of the Z-axis 10 and plays the role of stability and sliding. The B / C rotating shaft 14 is installed on the column 13 and the support seat 15. The machine tool drive box 2 is connected with the X-axis 12, the Y-axis 7, the Z-axis 10 and the B / C rotating shaft 14 respectively to realize the power supply and motion control of the motor module of each shaft. Through the linkage cooperation between the five shafts, the five-degree-of-freedom machining of the machine tool is realized, and the device problem of complex curved surface array structure conformal manufacturing is solved.

[0031] The bed body module further comprises a support seat 15; the support seat 15 is installed on the bed body 1; the column 13 and the support seat 15 serve as the installation base of the B / C rotating shaft 14.

[0032] The motion module comprises an X-axis 12, a Y-axis 7, a Z-axis 10 and a B / C rotating shaft 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 sliding block 122 is fixed on the lower surface of the slide 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 9, the Y-axis sliding block 71 is fixed on the upper surface of the slide 8 and cooperates with the Y-axis linear guide rail 72 to ensure smooth sliding; the Z-axis linear guide rail 102 in the Z-axis 10 is fixed on the front of the Z-axis sliding block 101, the Z-axis sliding block 101 is fixed on the front surface of the saddle 9 and cooperates with the Z-axis linear guide rail 102 to ensure smooth sliding; the B / C rotating shaft 14 is connected with the fixed rotating table 143, and the workpiece 144 is fixed on the rotating table 143; the above shafts can realize mutual linkage, achieve five-degree-of-freedom motion, and realize the posture adjustment of the complex curved surface.

[0033] As shown in the drawings, Figure 3 and Figure 4As shown, the screen printing module 11 includes a pneumatic linkage valve 111, a motion lock 112, a squeegee lock 113, a tension valve 114, a spring buffer 115, a screen printing shell 116, a connecting plate 117, a squeegee 118, a screen plate 119, a screen plate fixer 1110, a balance adjustment dial 1111, and a lead screw mechanism 1112; the pneumatic linkage valve 111 is fixed on the connecting plate 117 and connected with the flow field controller 5, and the movement of the squeegee 118 is controlled by the pressure of the gas; the motion lock 112 is fixed between the connecting plate 117 and the screen printing shell 116, and is used to prevent loosening when the squeegee 118 is working; the tension valve 114 is embedded in the connecting plate 117, and the up and down movement of the squeegee 118 is adjusted by adjusting the tension 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 to improve stability; the squeegee lock 113 is fixed below the connecting plate 117, and is connected with the squeegee 118 through a locking mechanism; the squeegee lock 113 is rotated clockwise to lock the position of the squeegee 118, and is rotated counterclockwise to loosen the squeegee 118 and complete replacement. The screen printing module 11 is not only an important part of the overall device, but also determines the quality of the array structure.The air pressure linkage valve 111 is fixed on the connecting flat plate 117 and connected with the flow field controller 5, and the movement of the squeegee 118 is controlled by the pressure of the gas; the movement lock 112 is fixed between the connecting flat plate 117 and the screen printing shell 116 by the bolt structure, and is used for locking and fixing the connecting flat plate 117 and the screen printing shell 116, so as to prevent the connection from loosening and affecting the work when the squeegee 118 works; the tightness valve 114 is embedded in the connecting flat plate 117, and the up and down movement of the squeegee 118 is adjusted by adjusting the tightness of the tightness valve 114; the spring buffer 115 is fixed on the connecting flat plate 117, and is used for buffering the vibration generated during work, thereby improving the stability of the device during work; the squeegee lock 113 is fixed below the connecting flat plate 117, and is connected with the squeegee 118 through the locking mechanism; the squeegee lock 113 is rotated clockwise to lock the position of the squeegee 118, and is rotated counterclockwise to loosen the squeegee 118 and complete the replacement; the screen plate 119 is fixed in the screen plate fixer 1110 and is used for carrying functional materials; the screen plate fixer 1110 is fixed below the screen printing shell 116 by the bolt structure and is used for completing the replacement and fixing of the screen plate 119; the balance adjustment dial 1111 is fixed on the screen printing shell 116 by the bolt structure, and the angle between the screen plate fixer 1110 and the horizontal direction can be changed to adjust the levelness of the screen plate fixer 1110; the lead screw mechanism 1112 is fixed outside the screen printing shell 116 and can drive the squeegee 118 to move along the screen plate 119 after receiving the signal sent by the upper computer 6. The above screen printing components are coordinated by the industrial computer 4 to complete the electrofluidic printing of the functional materials.

[0034] The center area of the screen plate 119 is a mesh, and the material of the screen plate 119 is an elastic PI film, so that the mesh in the center area can be deformed elastically to fit on the curved substrate to be printed, and the array structure material can be printed on the curved substrate to be printed through the mesh; the screen plate fixer 1110 is fixed below the screen printing shell 116 by the bolt structure, and is used for completing the replacement and fixing of the screen plate 119; the screen plate fixer 1110 is installed and dismounted by adjusting the tightness of the bolt structure; the balance adjustment dial 1111 is fixed on the screen printing shell 116, and the angle between the screen plate fixer 1110 and the horizontal direction is changed to adjust the levelness of the screen plate fixer 1110; the lead screw mechanism 1112 is fixed outside the screen printing shell 116 and can drive the squeegee 118 to move along the screen plate 119 after receiving the signal sent by the upper computer 6.

[0035] The control module comprises a machine tool driving box 2, a screen printing module driving box 3, an industrial computer 4, a flow field controller 5 and an upper computer 6; the machine tool driving box 2 controls the X-axis 12, Y-axis 7, Z-axis 10 and B / C rotating shaft 14 of the motion module to realize movement and communicates with the industrial computer 4 to realize direct control of the upper computer 6 on the machine tool driving box 2; the screen printing module driving box 3 controls parameter adjustment and motion control of the screen printing module and communicates with the industrial computer 4 to realize direct control of the upper computer 6; the upper computer 6 is connected with the industrial computer 4 to realize real-time display; the flow field controller 5 is connected with the air pressure linkage valve 111 to realize driving force supply and communicates with the industrial computer 4; the above parts are cooperatively matched to realize screen printing manufacturing of an array structure.

[0036] The bed body 1, the column 13, the slide 8, the saddle 9 and the support seat 15 are all machined by casting and jointly constitute a complete bed body module to provide installation support for other functional parts.

[0037] The movement speed range of the X-axis 12, Y-axis 7 and Z-axis 10 can be 0-42 m / min; the B / C rotating shaft 14 can realize 360-degree rotation to realize attitude adjustment of a complex curved surface base body.

[0038] The control method of the device of the application is as follows: as shown in Fig. 1, the screen printing module driving box 3 is connected with the flow field controller 5 and the air pressure linkage valve 111 to realize driving force supply; the screen printing module driving box 3 is connected with the industrial computer 4 to realize parameter adjustment and motion control; the machine tool driving box 2 is connected with the industrial computer 4 to realize direct control of the upper computer 6 on the machine tool driving box 2; the upper computer 6 is connected with the industrial computer 4 to realize real-time display. Figure 2As shown, the workpiece 144 is fixed on the rotary table workbench 143, the starting point of the screen printing manufacturing of the workpiece 144 and the manufacturing size range, array structure type are determined, the model of the workpiece 144 is imported into the array structure laying and path planning software in the host computer 6, the array structure is laid on the surface of the workpiece 144, the path planning is completed through the software, the post-processing is completed through the industrial computer to generate the numerical control G code path trajectory program, before the work of the screen printing device starts, the designed screen plate 119 is installed on the screen plate fixer 1110, the motion locker 112 is loosened, the connecting flat plate 117 part is opened upward, then the ink scraper locker 113 is adjusted, the installation of the ink scraper 118 is completed. The balance adjustment dial 1111 is adjusted, so that the screen plate 119 is in a horizontal position, then an appropriate amount of functional material is uniformly placed in the mesh center of the screen plate 119. The connecting flat plate 117 is adjusted to the working position, and the motion locker 112 is locked. Then the ink scraper 118 is moved up and down to the appropriate position through the adjustment of the tension valve 114, the flow field controller 5 is connected with the air pressure linkage valve 111, the functional material is placed on the screen plate 119 of the screen printing module 11, the generated numerical control G code trajectory program is started, the motion module drives the screen printing module 11 to move to the specified position, the host computer 6 gives a signal to control the lead screw mechanism 1112 of the screen printing module 11 to drive the ink scraper 118 to move along the screen plate 119, when moving to the center position of the screen plate, the flow field controller 5 connects the air pressure linkage valve 111 to apply pressure to the ink scraper 118 to move downward, the pressure of the ink scraper 118 on the screen plate will cause the planar screen plate 119 to deform, so as to realize the conformal of the screen plate 119 in the region and the curved substrate of the workpiece 144, in this region, the functional material is printed on the curved substrate through the screen plate 119, and the array structure printing in the region is completed.

[0039] The present application is not limited to the present embodiment, and any equivalent concept or change within the technical scope disclosed in the present application is included in the protection scope of the present application.

[0040] In the present 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.

[0041] In summary, the application provides a complex curved surface array structure fluid screen printing manufacturing device and method, which solves the problems of expensive device, poor manufacturing quality, low manufacturing efficiency and non-conformity in the current complex curved surface array structure manufacturing process. The proposed complex curved surface array structure screen printing manufacturing device and method innovatively designs a screen printing special machine tool for complex curved surface substrates. Through the cooperation of five-axis motion posture adjustment and multi-functional jet printing module, array structure multi-material, high-precision, high-efficiency and non-damage manufacturing can be realized. The device has the characteristics of full-process automation, fast forming and high efficiency in screen printing manufacturing, and has good application prospect in the fields of precision machining and micro-nano machining.

[0042] The above-mentioned embodiments only express the implementation of the application, but cannot be understood as the limitation of the scope of the patent of the application. It should be pointed out that, for those skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which all belong to the protection scope of the application.

Claims

1. A screen printing apparatus for array structures oriented towards complex curved surfaces, characterized in that, It includes a bed module, a motion module, a screen printing module, and a control module; The bed module carries the motion module, screen printing module, control module, and workpiece; The motion module is fixed to the bed module and moves in five degrees of freedom under the control of the control module to complete conformal posture adjustment for the complex curved surface; wherein The screen printing module is fixed on the bed module. The control module controls the motion module to make the screen printing module reach the desired printing position and screen print the array structure functional material on the workpiece. The screen printing module includes a screen plate (119), a screen plate holder (1110), and a screen printing shell (116). The screen plate (119) is fixedly installed in the screen plate holder (1110) to carry the array functional material. The screen plate holder (1110) is fixed below the screen printing shell (116) to complete the replacement and fixation 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; The bed module includes a bed (1), a column (13), a slide (8), a saddle (9), and a support (15); the column (13) is mounted above the bed (1); the slide (8) is mounted on the X-axis slider (122) on the upper surface of the column (13); the saddle (9) is mounted on the Y-axis linear guide (72); the support (15) is mounted on the bed (1); the column (13) and the support (15) serve as mounting supports for the B / C rotary axis (14); the slide (8) serves as a load-bearing and sliding component to control the sliding of the X-axis (12) and the Y-axis (7), while bearing the weight of the saddle (9) and the Z-axis (10); the saddle (9) serves as a base for fixing the Z-axis (10); The motion module includes an X-axis (12), a Y-axis (7), a Z-axis (10), and a B / C rotary axis (14). The X-axis (12) has an X-axis linear guide (121) fixed to the upper surface of the column (13), and an X-axis slider (122) fixed to the lower surface of the slide block (8) and cooperating with the X-axis linear guide (121) to ensure smooth sliding. The Y-axis (7) has a Y-axis linear guide (72) fixed to the lower surface of the saddle (9), and a Y-axis slider (71) fixed to the lower surface of the slide block (8). The upper surface of the slide (8) is engaged 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 engaged with the Z-axis linear guide (102) to ensure smooth sliding; the B / C rotary axis (14) is connected to the fixed turntable (143), and the workpiece (144) is fixed on the turntable (143).

2. The array structure screen printing apparatus for complex curved surfaces according to claim 1, characterized in that: The screen printing module (11) includes a pneumatic linkage valve (111), a motion locking device (112), a doctor blade locking device (113), a tension valve (114), a spring buffer (115), a screen printing housing (116), a connecting plate (117), a doctor blade (118), a screen (119), a screen holder (1110), a balance adjustment dial (1111), and a lead screw mechanism (1112). The pneumatic linkage valve (111) is fixed on the connecting plate (117) and connected to the flow field controller (5), and uses the pressure of the gas to control the movement of the doctor blade (118). The motion locking device (112) is fixed on the connecting plate (117) and the screen printing housing (116). 6) Between, to prevent loosening when the doctor blade (118) is working; the tension valve (114) is embedded in the connecting plate (117), and the up and down movement of the doctor blade (118) is adjusted by adjusting the tightness of the tension valve (114); the spring buffer (115) is fixed on the connecting plate (117) to buffer the vibration generated during operation and improve stability; the doctor blade lock (113) is fixed under the connecting plate (117) and is connected to the doctor blade (118) through the locking mechanism. The doctor blade lock (113) can lock the position of the doctor blade (118) by rotating clockwise and can loosen the doctor blade (118) by rotating counterclockwise and replace it.

3. The array structure screen printing apparatus for complex curved surfaces according to claim 2, characterized in that: The central area of ​​the screen printing plate (119) is a mesh. The material of the screen printing plate (119) is an elastic PI film, which causes elastic deformation so that the mesh in the central area adheres to the curved substrate to be printed. The array structure material is printed onto the curved substrate through the mesh. The screen printing plate holder (1110) is fixed to the bottom of the screen printing shell (116) by bolts, and is used to replace and fix the screen printing plate (119). The screen printing plate holder (1110) is fixed to the bottom of the screen printing shell (116) by bolts. The installation and removal of the screen plate (119) are achieved by adjusting the tightness of the bolt structure; the balance adjustment dial (1111) is fixed on the screen printing housing (116), which changes the angle between the screen plate holder (1110) and the horizontal direction, thereby adjusting the level of the screen plate holder (1110); the lead screw mechanism (1112) is fixed on the outside of the screen printing housing (116), and after receiving the signal sent by the host computer (6), it drives the doctor blade (118) to move along the screen plate (119).

4. The array structure screen printing apparatus for complex curved surfaces according to claim 1, characterized in that: 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 rotary axis (14) to achieve movement, and communicates with the industrial computer (4) to realize the 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 the 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) to realize the screen printing manufacturing of the array structure.

5. The array structure screen printing apparatus for complex curved surfaces according to claim 1, characterized in that, The bed (1), column (13), slide (8), saddle (9), and support (15) components are all manufactured by casting.

6. The array structure screen printing apparatus for complex curved surfaces according to claim 1, characterized in that, The speed range of the X-axis (12), Y-axis (7), and Z-axis (10) is 0~42m / min; the B / C rotation axis (14) can achieve 360-degree rotation to realize the attitude adjustment of complex curved surface substrates.

7. The control method for the array structure screen printing apparatus for complex curved surfaces according to any one of claims 1 to 6, characterized in that, Includes the following steps: Step 1: Fix the workpiece (144) on the turntable (143) and determine the starting point, manufacturing size range, and array structure type of the workpiece (144) for screen printing manufacturing; Step 2: Import the model of the workpiece (144) into the array structure covering and path planning software in the host computer (6), cover the array structure onto the surface of the complex curved workpiece (144), complete the G code path trajectory planning, and generate the CNC G code path trajectory program for the curved surface conformal after the industrial control computer (4) completes the post-processing. Step 3: Place the array functional material on the screen printing plate (119) of the screen printing module (11), start the generated CNC G code trajectory program, and make the motion module drive the screen printing module (11) to the specified position; Step 4: The host computer (6) sends a signal to drive the doctor blade (118) of the screen printing module (11) to move along the screen plate (119) when it moves to the center position of the screen plate (119). The flow field controller (5) controls the doctor blade (118) to move downward. The pressure exerted by the doctor blade (118) on the screen plate (119) causes the flat screen plate to deform, thereby realizing the conformal bonding between the screen plate and the complex curved substrate in the region. In this region, the array functional material is printed on the complex curved substrate through the screen plate to complete the printing of the array functional mechanism in this region.

8. The control method for the array structure screen printing apparatus for complex curved surfaces according to claim 7, characterized in that: The material of the printed array structure includes conductive metal ink or conductive polymer.

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