CN105128339B - The device and method that DLP photocuring 3D printer light irradiance compensates - Google Patents
The device and method that DLP photocuring 3D printer light irradiance compensates Download PDFInfo
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- CN105128339B CN105128339B CN201510604298.1A CN201510604298A CN105128339B CN 105128339 B CN105128339 B CN 105128339B CN 201510604298 A CN201510604298 A CN 201510604298A CN 105128339 B CN105128339 B CN 105128339B
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Abstract
The invention discloses the device and method that DLP photocuring 3D printer light irradiance compensates; Including the DLP projector being arranged on below workbench, DLP projector upwards projects, and DLP projector is connected with Control card, Control card respectively with irradiatometer and realize the rotary apparatus of DLP projector light path break-make and be connected; It is fixedly arranged above Z axis slide unit, profiled member supporting plate and resin storage tank at workbench, resin storage tank is built with resin, the projected light of DLP projector is irradiated to resin surface through resin storage tank, and Z axis slide unit can control profiled member supporting plate and move up and down along vertical direction in resin storage tank; When the irradiance value of projected light is equal to setting value, resin completes solidification in layer under the irradiation of projected light; When rotary apparatus rotates to set angle, the projecting light path of DLP projector is irradiated on irradiatometer, and the irradiance of projected light is carried out data acquisition and feeds back to Control card by irradiatometer; The present invention has the advantage that can guarantee that irradiance when every layer of resin solidifies maintains set-point.
Description
Technical field
The present invention relates to the device and method that a kind of DLP photocuring 3D printer light irradiance compensates, belong to 3D printing technique field.
Background technology
DLP photocuring 3D printing technique is to adopt digital light to process (DLP) technology, uses DLP projector successively curable liquid resin to manufacture the technology of entity component. This technology can quickly produce very fine part. Have broad application prospects at numerous areas, such as aspects such as industrial products conceptual design, rapid mold manufacture, medical applications.
DLP photocuring 3D printer hardware components mainly includes Z axis slide unit, profiled member supporting plate, resin storage tank, workbench, DLP projector. In printer specific works, scialyscope is arranged on below workbench, and Z axis slide unit and resin storage tank are fixing on the table, and profiled member supporting plate is positioned at inside resin storage tank. Described Z axis slide unit is a kind of platform that can vertically carry out accurately movement, moves profiled member supporting plate in the vertical direction. Described resin storage tank is a hopper equipped with liquid photosensitive resin. Described workbench is used to the table top of fixing Z axis slide unit, resin storage tank and profiled member supporting plate. Described profiled member supporting plate is a kind of device sticking profiled member. Image information is passed to scialyscope and produces projected light by software section, and projected light is irradiated to liquid resin surface through resin storage tank, and the light energy E that liquid resin absorbs reaches to solidify required energy threshold EcTime can be polymerized to solid-state.The light energy size that resin absorbs will affect the solidification precision of resin.
Above-mentioned light energy is directly proportional to the irradiation time t and irradiance I of projected light. Giving timing between upon irradiation, the size of light energy is directly proportional to irradiance. Consider that current DLP projector irradiance after working long hours can be decayed, simultaneously DLP photocuring printer is to carry out constructed object by successively solidifying the mode of resin, if the irradiance of scialyscope is different when therefore every layer of resin solidifies, the machining accuracy of product will be affected, even result in product molding failure.
Summary of the invention
The purpose of the present invention is contemplated to solve the problems referred to above, it is provided that the device and method that a kind of DLP photocuring 3D printer light irradiance compensates, and it has the advantage that can guarantee that irradiance when every layer of resin solidifies maintains set-point.
To achieve these goals, the present invention adopts the following technical scheme that
The device that DLP photocuring 3D printer light irradiance compensates, including:
Being arranged on the DLP projector below workbench, DLP projector upwards projects, and described DLP projector is connected with Control card, and Control card is connected with irradiatometer and the rotary apparatus for realizing DLP projector light path break-make respectively; It is fixedly arranged above resin storage tank at workbench, resin storage tank, built with resin, workbench is also fixed Z axis slide unit, Z axis slide unit is fixed with profiled member supporting plate, profiled member supporting plate is positioned at inside resin storage tank, and profiled member supporting plate can move up and down along vertical direction inside resin storage tank; The projected light of DLP projector is irradiated to resin surface through resin storage tank, and when the irradiance value of projected light is equal to setting value, resin completes solidification in layer under the irradiation of projected light;
When rotary apparatus rotates to set angle, the projecting light path of DLP projector is irradiated on irradiatometer, and the irradiance of projected light is carried out data acquisition by irradiatometer; Before every layer of resin solidifies, the irradiance value of projected light of DLP projector measured by irradiatometer, and irradiance value is fed back to Control card processes, if irradiance value is equal to setting value, Control card controls rotary apparatus and removes, and makes light therethrough resin storage tank be irradiated to resin surface; If irradiance value is less than setting value, Control card improves the light luminance of scialyscope, until irradiance value is equal to setting value.
Described rotary apparatus includes: motor and brake sack; Described motor is by Control card control, and described motor is connected with brake sack, and described step motor control brake sack rotates; Described brake sack is provided with perforate.
The effective measuring area being sized larger than irradiatometer of described perforate.
Described Control card includes scialyscope and controls module, step motor control module, irradiatometer data acquisition module, main control module. Scialyscope controls module for setting the brightness of scialyscope, step motor control module is for controlling the rotation of motor, irradiatometer data acquisition module is for processing the irradiance value data of irradiatometer feedback, main control module controls scialyscope respectively and controls module, step motor control module, irradiatometer data acquisition module, makes three module cooperative work.
Described irradiatometer is fixed on brake sack.
When rotary apparatus rotates to set angle, the projecting light path of DLP projector is irradiated on irradiatometer by the perforate of brake sack.
Described resin is liquid photosensitive resin.
Described motor and brake sack composition shutter.
Described brake sack is the iron plate that surface carried out that plastic-blasting processed.
Reflecting for preventing scialyscope light to be irradiated to brake sack surface, brake sack surface is processed by plastic-blasting, processes as black.Brake sack size is determined according to projector lens, need to cover all projector lens.
Described Control card can realize the control of shutter, the collection of irradiatometer data, the adjustment of DLP projector brightness.
The method that DLP photocuring 3D printer light irradiance compensates, comprises the steps:
Step (1): rotary apparatus is rotated to set angle, the projecting light path of DLP projector is irradiated on irradiatometer, and the irradiance of projected light is carried out data acquisition by irradiatometer;
Step (2): before every layer of resin in resin storage tank solidifies, the irradiance value of the projected light of DLP projector measured by irradiatometer, and irradiance value is fed back to Control card processes:
If irradiance value is equal to setting value, Control card controls rotary apparatus and removes, and makes light therethrough resin storage tank be irradiated to resin surface;
If irradiance value is less than setting value, Control card controls rotary apparatus and resets, and then Control card improves the light luminance of scialyscope, until irradiance value is equal to setting value.
In described step (2), Control card control rotary apparatus is removed, and refers to:
Control card drive stepping motor works, and motor drives brake sack to rotate, and brake sack leaves the projection ray of scialyscope.
In described step (2), Control card controls rotary apparatus reset, refers to:
Control card drive stepping motor works, motor drives brake sack to rotate, brake sack blocks the projection ray of scialyscope, make projection ray can not be irradiated on the resin of resin storage tank, only some light is irradiated on irradiatometer by the perforate on brake sack, for the irradiance of irradiatometer Real-time Collection scialyscope.
Beneficial effects of the present invention:
The DLP photocuring 3D printer light irradiance compensation method good reliability of the present invention, irradiance during by every layer of resin is solidified is adjusted, ensure that irradiance value is setting value, improve the machining accuracy of product, solve the problem of light irradiance decay in the course of processing.
Accompanying drawing explanation
Fig. 1 is DLP photocuring 3D printer light irradiance compensation device schematic diagram;
Fig. 2 is Control card functional block diagram.
In figure: 1, profiled member supporting plate, 2, photosensitive resin, 3, resin storage tank, 4, workbench, 5, irradiatometer, 6, brake sack, 7, DLP projector, 8, Z axis slide unit, 9, motor, 10, Control card.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described with embodiment.
As it is shown in figure 1, be arranged on the DLP projector 7 below workbench 4, DLP projector 7 upwards projects, and described DLP projector 7 is connected with Control card 10, Control card 10 respectively with irradiatometer 5 and realize the rotary apparatus of DLP projector 7 light path break-make and be connected; Being fixedly arranged above resin storage tank 3 at workbench, resin storage tank 3 is built with photosensitive resin 2, and the projected light of DLP projector 7 is irradiated to photosensitive resin 2 surface through resin storage tank 3, and Z axis slide unit 8 can make profiled member supporting plate 1 move up and down along vertical direction resin storage tank 3 is internal; When the irradiance value of projected light is equal to setting value, resin completes solidification in layer under the irradiation of projected light;
The DLP photocuring 3D printer light irradiance compensation method of the present invention, specifically implements according to following steps:
When product processing starts, Control card makes brake sack cover above DLP projector camera lens by controlling motor.
It is the white image of 1920*1080 that Control card controls DLP projector one resolution of projection, and the resolution that image resolution ratio size is set by scialyscope determines, the light of DLP projector projection is irradiated on irradiatometer.
Irradiance measurement value is fed back to Control card 10 by irradiatometer 5.
Control card 10 first determines whether that whether irradiance measurement value is equal to irradiance setting value, if measured value is equal to setting value, then controlling motor 9 rotation makes brake sack 6 leave scialyscope light path, projector part manuscript picture is controlled subsequently by holding wire, projected light is through bottom resin storage tank, it is irradiated to liquid resin surface, it is achieved the solidification of resin. After having solidified, brake sack 6 shelters from projection ray, continues the solidification of next layer of resin.
If measured value is less than setting value, Control card improves the brightness of scialyscope by holding wire, until the measured value of irradiatometer reaches setting value, after measured value reaches setting value, Control card controls motor rotation makes brake sack leave scialyscope light path, and Control card controls projector part manuscript picture by holding wire subsequently, and projected light is through bottom resin storage tank, it is irradiated to liquid resin surface, it is achieved the solidification of resin. After having solidified, brake sack shelters from projection ray, continues the solidification of next layer of resin.
As in figure 2 it is shown, described Control card includes scialyscope controls module, step motor control module, irradiatometer data acquisition module, main control module. Scialyscope controls module for setting the brightness of scialyscope, step motor control module is for controlling the rotation of motor, irradiatometer data acquisition module is for processing the irradiance value data of irradiatometer feedback, main control module controls scialyscope respectively and controls module, step motor control module, irradiatometer data acquisition module, makes three module cooperative work.
The specific embodiment of the present invention is described in conjunction with accompanying drawing although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme, those skilled in the art need not pay various amendments or deformation that creative work can make still within protection scope of the present invention.
Claims (8)
- The device that 1.DLP photocuring 3D printer light irradiance compensates, is characterized in that, including:Being arranged on the DLP projector below workbench, DLP projector upwards projects, and described DLP projector is connected with Control card, and Control card is connected with irradiatometer and the rotary apparatus for realizing DLP projector light path break-make respectively; It is fixedly arranged above resin storage tank at workbench, resin storage tank, built with resin, workbench is also fixed Z axis slide unit, Z axis slide unit is fixed with profiled member supporting plate, profiled member supporting plate is positioned at inside resin storage tank, and profiled member supporting plate can move up and down along vertical direction inside resin storage tank; The projected light of DLP projector is irradiated to resin surface through resin storage tank, and when the irradiance value of projected light is equal to setting value, resin completes solidification in layer under the irradiation of projected light;When rotary apparatus rotates to set angle, the projecting light path of DLP projector is irradiated on irradiatometer, and the irradiance of projected light is carried out data acquisition by irradiatometer; Before every layer of resin solidifies, the irradiance value of projected light of DLP projector measured by irradiatometer, and irradiance value is fed back to Control card processes, if irradiance value is equal to setting value, Control card controls rotary apparatus and removes, and makes light therethrough resin storage tank be irradiated to resin surface; If irradiance value is less than setting value, Control card improves the light luminance of scialyscope, until irradiance value is equal to setting value;Described rotary apparatus includes: motor and brake sack; Described motor is by Control card control, and described motor is connected with brake sack, and described step motor control brake sack rotates; Described brake sack is provided with perforate;Described irradiatometer is fixed on brake sack.
- 2. the device that DLP photocuring 3D printer light irradiance as claimed in claim 1 compensates, is characterized in that, the effective measuring area being sized larger than irradiatometer of described perforate.
- 3. the device that DLP photocuring 3D printer light irradiance as claimed in claim 1 compensates, is characterized in that, described Control card includes scialyscope and controls module, step motor control module, irradiatometer data acquisition module, main control module; Scialyscope controls module for setting the brightness of scialyscope, step motor control module is for controlling the rotation of motor, irradiatometer data acquisition module is for processing the irradiance value data of irradiatometer feedback, main control module controls scialyscope respectively and controls module, step motor control module, irradiatometer data acquisition module, makes three module cooperative work.
- 4. the device that DLP photocuring 3D printer light irradiance as claimed in claim 1 compensates, is characterized in that, described resin is liquid photosensitive resin.
- 5. the device that DLP photocuring 3D printer light irradiance as claimed in claim 1 compensates, is characterized in that, described brake sack is the iron plate that surface carried out that plastic-blasting processed.
- The method that 6.DLP photocuring 3D printer light irradiance compensates, is characterized in that, comprise the steps:Step (1): rotary apparatus is rotated to set angle, the projecting light path of DLP projector is irradiated on irradiatometer, and the irradiance of projected light is carried out data acquisition by irradiatometer;Step (2): before every layer of resin in resin storage tank solidifies, the irradiance value of the projected light of DLP projector measured by irradiatometer, and irradiance value is fed back to Control card processes:If irradiance value is equal to setting value, Control card controls rotary apparatus and removes, and makes light therethrough resin storage tank be irradiated to resin surface;If irradiance value is less than setting value, Control card controls rotary apparatus and resets, and then Control card improves the light luminance of scialyscope, until irradiance value is equal to setting value.
- 7. the method that DLP photocuring 3D printer light irradiance as claimed in claim 6 compensates, is characterized in that, in described step (2), Control card control rotary apparatus is removed, and refers to:Control card drive stepping motor works, and motor drives brake sack to rotate, and brake sack leaves the projection ray of scialyscope.
- 8. the method that DLP photocuring 3D printer light irradiance as claimed in claim 6 compensates, is characterized in that, in described step (2), Control card controls rotary apparatus reset, refers to:Control card drive stepping motor works, motor drives brake sack to rotate, brake sack blocks the projection ray of scialyscope, make projection ray can not be irradiated on the resin of resin storage tank, only some light is irradiated on irradiatometer by the perforate on brake sack, for the irradiance of irradiatometer Real-time Collection scialyscope.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT517956B1 (en) * | 2015-12-22 | 2017-06-15 | Klaus Stadlmann Dr | Method for producing a three-dimensional body |
| CN105425546B (en) * | 2015-12-30 | 2017-09-29 | 大族激光科技产业集团股份有限公司 | A kind of method of DLP exposure energies homogenization |
| CN105904726B (en) * | 2016-04-15 | 2017-12-08 | 浙江大学 | A kind of method based on digitized projection technique construction polymer three-dimensional structure |
| CN107053663B (en) * | 2017-06-27 | 2019-11-19 | 上海联泰三维科技有限公司 | Optical system, irradiation control method and the 3D printing equipment being applicable in |
| CN108381910B (en) * | 2018-02-09 | 2019-05-28 | 山东大学 | The continuous liquid level manufacturing method and apparatus of speed change adjusted based on mask image gray scale |
| CN111438941B (en) * | 2020-03-30 | 2022-03-22 | 上海联泰科技股份有限公司 | Three-dimensional data processing system and method and applicable 3D printing equipment |
| CN115648629B (en) * | 2022-10-24 | 2024-06-28 | 上海复志信息科技股份有限公司 | LED light attenuation compensation device and method for DLP optical machine |
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| CN104085106A (en) * | 2014-01-21 | 2014-10-08 | 上海坤融实业有限公司 | DLP principle based 3D printer |
| EP2878402A1 (en) * | 2013-12-02 | 2015-06-03 | SLM Solutions Group AG | Apparatus and method for producing three-dimensional work pieces with a radiation detection device |
| CN204914609U (en) * | 2015-09-21 | 2015-12-30 | 山东大学 | Device of DLP photocuring 3D printer photoirradiation degree compensation |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1053843A (en) * | 1989-12-22 | 1991-08-14 | 纳幕尔杜邦公司 | Solid imaging system |
| EP2878402A1 (en) * | 2013-12-02 | 2015-06-03 | SLM Solutions Group AG | Apparatus and method for producing three-dimensional work pieces with a radiation detection device |
| CN104085106A (en) * | 2014-01-21 | 2014-10-08 | 上海坤融实业有限公司 | DLP principle based 3D printer |
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