CN114734737A - Projection conversion drawing method, curved surface printing method and curved surface printing device - Google Patents
Projection conversion drawing method, curved surface printing method and curved surface printing device Download PDFInfo
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- CN114734737A CN114734737A CN202210312410.4A CN202210312410A CN114734737A CN 114734737 A CN114734737 A CN 114734737A CN 202210312410 A CN202210312410 A CN 202210312410A CN 114734737 A CN114734737 A CN 114734737A
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- curved surface
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000003854 Surface Print Methods 0.000 title claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 15
- 238000007639 printing Methods 0.000 claims abstract description 68
- 239000007921 spray Substances 0.000 claims abstract description 46
- 239000000758 substrate Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 238000007641 inkjet printing Methods 0.000 description 3
- 238000013507 mapping Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J25/00—Actions or mechanisms not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
- B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0082—Digital printing on bodies of particular shapes
- B41M5/0088—Digital printing on bodies of particular shapes by ink-jet printing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
- G06T3/06—Topological mapping of higher dimensional structures onto lower dimensional surfaces
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Ink Jet (AREA)
- Spray Control Apparatus (AREA)
Abstract
The invention provides a projection conversion drawing method, a curved surface printing method and a curved surface printing device, wherein the curved surface printing method comprises the following steps: s1, placing the curved surface product on a six-axis carrier of a curved surface printing device, shooting the surface shape of the curved surface product by using a three-dimensional camera, and feeding the shape back to a control system; s2, generating a printing pattern by the control system according to the pattern and the curved surface shape to be printed by a projection conversion drawing method; s3, forming a printing track and a printing flow through software based on the printing pattern; s4, the three-axis platform drives the curved surface product to move below the spray head along the printing track, the six-axis carrier realizes multi-axis posture adjustment of the curved surface product, and the printed pattern is printed on the curved surface product. The invention provides a curved surface printing scheme combining scanning and profiling motion, through automatic software control, the angle between a spray head and a product base is basically kept in a controllable range, and meanwhile, the height of the spray head from a printed product is basically kept consistent in the printing process.
Description
Technical Field
The invention relates to the technical field of ink-jet printing, in particular to a projection conversion drawing method, a curved surface printing method and a curved surface printing device.
Background
The digital green manufacturing is taken as the important characteristic of intelligent manufacturing, has promoted the transformation upgrade of many traditional process models and the continuous emergence of new process means, and in the novel printing electronics field, the piezoelectricity ink-jet printing technology compares in traditional printing technology, all has very big advantage in the aspect of flexibility, big breadth, customization degree. However, with the continuous development of materials and applications, especially in the curved surface display industry, higher requirements are put forward for high-drop curved surface printing. Because the height from a nozzle of a spray head to the surface of a product is required to be within 1mm in the ink-jet printing process, the printing difficulty on a curved surface is high, and special equipment for curved surface printing does not exist in the industry at present.
Disclosure of Invention
The invention aims to provide a projection conversion drawing method, a curved surface printing method and a curved surface printing device, which solve the problems of deformation of a printed image and poor printing quality in the conventional high-drop curved surface printing and ensure the final effect of curved surface printing by combining automatic control and ink-jet printing software processing.
In order to solve the above technical problem, an embodiment of the present invention provides a projection transformation mapping method, which projects a position and pose image file of a curved surface onto a plane to obtain a new print image, and controls a print head to call a projection corresponding to the position and pose for printing.
The projection conversion mapping method comprises the following steps of:
(1) through a designed image processing algorithm, a scheme of contour fitting approximation is adopted, and a curved surface substrate to be printed is simplified into a simplified multi-surface shape of a multi-section plane through a set rectangular frame with a fixed width;
(2) the pattern to be printed is projected onto the surface of the substrate using a vertical projection method, resulting in a plurality of printed images in the plane of the substrate.
The invention also provides a curved surface printing method, which comprises the following steps:
s1, placing the curved surface product on a six-axis platform deck of the curved surface printing device, shooting the surface shape of the curved surface product by using a three-dimensional camera, and feeding the shape back to the control system;
s2, generating a printing pattern by the control system according to the pattern to be printed and the curved surface shape of the curved surface product by a projection conversion drawing method;
s3, forming a printing track and a printing flow through software based on the printing pattern;
and S4, driving the curved surface product to move below the spray head along the printing track by using the three-axis platform of the curved surface printing device, and realizing multi-axis attitude adjustment of the curved surface product through the six-axis platform table until the printed pattern is printed on the curved surface product.
The printing process in step S4 is as follows:
s4.1, placing a curved surface product to be printed on a six-axis carrying platform, introducing a pattern to be printed into an industrial personal computer, and setting position parameters;
s4.2, driving the six-axis carrying platform and the curved surface product fixed on the six-axis carrying platform to move by a product moving shaft of the curved surface printing device, scanning by a three-dimensional scanning camera to obtain a curved surface three-dimensional image of the product, and transmitting the image to an industrial personal computer;
s4.3, simplifying the curved surface of the curved surface product into a plurality of sections of planes by utilizing the developed control software, and vertically projecting the pattern to be printed onto the plurality of sections of planes by adopting a projection method to obtain a corresponding projection printing pattern;
s4.4, leading the projection printing pattern into a printing driver by the control system;
s4.5, controlling the six-axis carrying platform by the control system to adjust the curved surface product to the corresponding printing posture;
s4.6, controlling the movement of the product moving shaft to finish the printing of the corresponding drawing file;
and S4.7, repeating the steps S4.4-S4.6, and finishing printing of all the multi-section planes until the printed patterns are printed on the curved surface product.
In the printing process of step S4, the instantaneous printing area on the curved product is perpendicular to the nozzles.
The invention also provides a curved surface printing device which comprises a base station, a six-axis loading platform, a product moving shaft, a three-dimensional camera, a spray head and a spray head moving shaft, wherein the product moving shaft is arranged on the base station along the X direction, the spray head moving shaft is arranged on the base station along the Y direction, the spray head is arranged on the spray head moving shaft through a spray head positioning device, the spray head positioning device reciprocates along the Y direction relative to the spray head moving shaft, the spray head reciprocates along the Z direction relative to the spray head positioning device, the product moving shaft is positioned below the spray head, the six-axis loading platform capable of reciprocating along the X direction is connected onto the product moving shaft in a sliding mode, a curved surface product to be printed is arranged on the six-axis loading platform, a rack transversely arranged above the product moving shaft is arranged on the base station, and the three-dimensional camera is fixedly arranged on the rack.
The technical scheme of the invention has the following beneficial effects:
1. the invention provides a projection conversion drawing method aiming at a copying printing process, which converts a final pattern to be printed on a curved surface into planar printing in a projection mode and finally realizes linkage printing through a control system.
2. The invention provides a curved surface printing scheme based on combination of scanning and profiling motion, which ensures that the angle between a spray head and a product base is basically kept in a controllable range through automatic software control, and simultaneously ensures that the height of the spray head from a printed product is basically kept consistent in the printing process.
Drawings
FIG. 1 is a schematic diagram of a printing process route according to the present invention;
FIG. 2 is a schematic view of a curved surface printing apparatus according to the present invention.
Description of reference numerals:
1. a base station; 2. six-axis carrying platform; 3. a product moving shaft; 4. a three-dimensional camera; 5. a nozzle positioning device; 6. a spray head moving shaft.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a projection conversion drawing method, which projects a figure file of a curved surface relative to a pose onto a plane to obtain a new printing image, and controls a printing nozzle to call the projection of the corresponding pose for printing.
The steps of obtaining a printed image are as follows:
(1) through a designed image processing algorithm, a scheme of contour fitting approximation is adopted, and a curved surface substrate to be printed is simplified into a simplified multi-surface shape of a multi-section plane through a set rectangular frame with a fixed width;
(2) the pattern to be printed is projected onto the surface of the substrate using a vertical projection method, resulting in a plurality of printed images in the plane of the substrate.
The invention also provides a curved surface printing method, which comprises the following steps:
s1, placing the curved surface product on a six-axis carrier of a curved surface printing device, shooting the surface shape of the curved surface product by using a three-dimensional camera, and feeding the shape back to a control system;
s2, generating a printing pattern by the control system according to the pattern to be printed and the curved surface shape of the curved surface product by a projection conversion drawing method;
s3, forming a printing track and a printing flow through software based on the printing pattern;
s4, driving the curved surface product to move below the spray head along the printing track by using the three-axis platform of the curved surface printing device, and realizing multi-axis posture adjustment of the curved surface product through the six-axis platform deck, wherein in the printing process, the instantaneous printing area on the curved surface product is kept vertical to the spray head (as shown in figure 1) until the printing pattern is printed on the curved surface product. The printing process in this step is as follows:
s4.1, placing a curved surface product to be printed on a six-axis carrying platform, introducing a pattern to be printed into an industrial personal computer, and setting position parameters;
s4.2, driving the six-axis carrying platform and the curved surface product fixed on the six-axis carrying platform to move by a product moving shaft of the curved surface printing device, scanning by a three-dimensional scanning camera to obtain a curved surface three-dimensional image of the product, and transmitting the image to an industrial personal computer;
s4.3, simplifying the curved surface of the curved surface product into a plurality of sections of planes by utilizing the developed control software, and vertically projecting the pattern to be printed onto the plurality of sections of planes by adopting a projection method to obtain a corresponding projection printing pattern;
s4.4, leading the projection printing pattern into a printing driver by the control system;
s4.5, controlling the six-axis carrying platform by the control system to adjust the curved surface product to the corresponding printing posture;
s4.6, controlling the movement of the product moving shaft to finish printing of the corresponding drawing;
and S4.7, repeating the steps S4.4-S4.6, and finishing printing of all the multi-section planes until the printed patterns are printed on the curved surface product.
In this embodiment, the control system of the curved surface printing device is a general controller, and may be a computer, and related control software is installed in the computer to control movement of the six-axis stage, the product moving axis, the nozzle moving axis, and the like of the curved surface printing device, and also to receive an image signal of a surface shape of a curved surface product photographed by the three-dimensional camera and generate a print pattern according to a projection-transformation mapping method, and then based on the print pattern, a print track and a print flow are formed by software to determine that the curved surface printing device completes printing of the pattern. The computer capable of completing the control principle is the prior art and is not an innovation point of the invention, so the invention mainly protects the projection conversion drawing method and the curved surface printing method, and is not the structure of the control system (computer), and the structure and the electrical principle of the control system are not repeated in the embodiment.
The invention also provides a curved surface printing device with the structure shown in figure 2, which comprises a base station 1, a six-axis carrying platform 2, a product moving shaft 3, a three-dimensional camera 4, a spray head and a spray head moving shaft 6, the product moving shaft 3 is arranged on the base platform 1 along the X direction, the spray head moving shaft 6 is arranged on the base platform 1 along the Y direction, the spray head is arranged on a spray head moving shaft 6 through a spray head positioning device 5, the spray head positioning device 5 reciprocates along the Y direction relative to the spray head moving shaft 6, the spray head reciprocates along the Z direction relative to a spray head positioning device 5, the product moving shaft 3 is positioned below the spray head, the product moving shaft 3 is connected with a six-shaft platform 2 capable of reciprocating along the X direction in a sliding way, a curved surface product to be printed is arranged on the six-shaft platform 2, the base platform 1 is provided with a rack which is transversely arranged above the product moving shaft 3, and the three-dimensional camera 4 is fixedly arranged on the rack.
The curved surface printing device also comprises an ink drop analysis device and an ink drop collection device.
The invention provides a projection conversion drawing method aiming at a copying printing process, which converts a final pattern to be printed on a curved surface into planar printing in a projection mode and finally realizes linkage printing through a control system. The invention provides a curved surface printing scheme based on combination of scanning and profiling motion, which ensures that the angle between a spray head and a product base is basically kept in a controllable range through automatic software control, and simultaneously ensures that the height of the spray head from a printed product is basically kept consistent in the printing process.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A projection transformation drawing method is characterized in that a figure file of a curved surface relative to a pose is projected onto a plane to obtain a new printing image, and a printing nozzle is controlled to call the projection of the corresponding pose to print.
2. The projection conversion drawing method according to claim 1, wherein the step of obtaining the print image is as follows:
(1) through a designed image processing algorithm, a scheme of contour fitting approximation is adopted, and a curved surface substrate to be printed is simplified into a simplified multi-surface shape of a multi-section plane through a set rectangular frame with a fixed width;
(2) the pattern to be printed is projected onto the surface of the substrate using a vertical projection method, resulting in a plurality of printed images in the plane of the substrate.
3. A curved surface printing method is characterized by comprising the following steps:
s1, placing the curved surface product on a six-axis platform deck of the curved surface printing device, shooting the surface shape of the curved surface product by using a three-dimensional camera, and feeding the shape back to the control system;
s2, generating a printing pattern by the control system according to the pattern to be printed and the curved surface shape of the curved surface product by a projection conversion drawing method;
s3, forming a printing track and a printing flow through software based on the printing pattern;
and S4, driving the curved surface product to move below the spray head along the printing track by using the three-axis platform of the curved surface printing device, and realizing multi-axis attitude adjustment of the curved surface product through the six-axis platform table until the printed pattern is printed on the curved surface product.
4. The curved surface printing method according to claim 3, wherein the printing process in step S4 is as follows:
s4.1, placing a curved surface product to be printed on a six-axis carrying platform, introducing a pattern to be printed into an industrial personal computer, and setting position parameters;
s4.2, driving the six-axis carrying platform and the curved surface product fixed on the six-axis carrying platform to move by a product moving shaft of the curved surface printing device, scanning by a three-dimensional scanning camera to obtain a curved surface three-dimensional image of the product, and transmitting the image to an industrial personal computer;
s4.3, simplifying the curved surface of the curved surface product into a plurality of sections of planes by utilizing the developed control software, and vertically projecting the pattern to be printed onto the plurality of sections of planes by adopting a projection method to obtain a corresponding projection printing pattern;
s4.4, leading the projection printing pattern into a printing driver by the control system;
s4.5, controlling the six-axis carrying platform by the control system to adjust the curved surface product to the corresponding printing posture;
s4.6, controlling the movement of the product moving shaft to finish printing of the corresponding drawing;
and S4.7, repeating the steps S4.4-S4.6, and finishing printing of all the multi-section planes until the printed patterns are printed on the curved surface product.
5. The method of claim 3, wherein during the printing of step S4, the instantaneous print area on the curved product is maintained perpendicular to the nozzles.
6. The curved surface printing device is characterized by comprising a base station, a six-axis loading platform, a product moving shaft, a three-dimensional camera, a spray head and a spray head moving shaft, wherein the product moving shaft is arranged on the base station along the X direction, the spray head moving shaft is arranged on the base station along the Y direction, the spray head is arranged on the spray head moving shaft through a spray head positioning device, the spray head positioning device moves back and forth along the Y direction relative to the spray head moving shaft, the spray head moves back and forth along the Z direction relative to the spray head positioning device, the product moving shaft is arranged below the spray head, the six-axis loading platform capable of moving back and forth along the X direction is connected to the product moving shaft in a sliding mode, a curved surface product to be printed is arranged on the six-axis loading platform, a rack transversely arranged above the product moving shaft is arranged on the base station, and the three-dimensional camera is fixedly arranged on the rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210312410.4A CN114734737A (en) | 2022-03-28 | 2022-03-28 | Projection conversion drawing method, curved surface printing method and curved surface printing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210312410.4A CN114734737A (en) | 2022-03-28 | 2022-03-28 | Projection conversion drawing method, curved surface printing method and curved surface printing device |
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| Publication Number | Publication Date |
|---|---|
| CN114734737A true CN114734737A (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210312410.4A Withdrawn CN114734737A (en) | 2022-03-28 | 2022-03-28 | Projection conversion drawing method, curved surface printing method and curved surface printing device |
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| Country | Link |
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| CN (1) | CN114734737A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115837805A (en) * | 2023-02-22 | 2023-03-24 | 苏州优备精密智能装备股份有限公司 | Equipment for realizing ink jet printing on side edge of display panel and ink jet printing control method thereof |
-
2022
- 2022-03-28 CN CN202210312410.4A patent/CN114734737A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115837805A (en) * | 2023-02-22 | 2023-03-24 | 苏州优备精密智能装备股份有限公司 | Equipment for realizing ink jet printing on side edge of display panel and ink jet printing control method thereof |
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Application publication date: 20220712 |
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| WW01 | Invention patent application withdrawn after publication |