CN101537711B - Quick molding method for energy following point scanning and photo-curing - Google Patents
Quick molding method for energy following point scanning and photo-curing Download PDFInfo
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- CN101537711B CN101537711B CN2009100215727A CN200910021572A CN101537711B CN 101537711 B CN101537711 B CN 101537711B CN 2009100215727 A CN2009100215727 A CN 2009100215727A CN 200910021572 A CN200910021572 A CN 200910021572A CN 101537711 B CN101537711 B CN 101537711B
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Abstract
The invention relates to the field of photo-curing molding and manufacturing, in particular to a quick molding method for energy following point scanning and photo-curing. The method can be applied to the fields of machinery, instruments, computers, automobiles, space flight and aviation, construction, medical treatment engineering, and the like. The energy following point scanning and photo-curing method uses an ultraviolet-light emitting diode (UV-LED) as a light source for initiating a photo-curing reaction and focuses the light source on a photo-curing resin liquid level through a focusing mirror, wherein the UV-LED and the focusing mirror perform a plane spot scanning movement under the drive of a two dimensional worktable so as to complete the two dimensional scanning and molding of a current layer of a part; and in the stages of acceleration and deceleration of a scanning line, the working current of the UV-LED changes in real time according to the change of the scanning speed.
Description
Technical field
The present invention relates to the photocuring moulding and make the field, particularly a kind of quick molding method for energy following point scanning and photo-curing can be applicable to fields such as machinery, instrument and meter, computer, automobile, space flight and aviation, building, medical engineering.
Background technology
Photocureable rapid shaping mainly is to utilize photosensitive resin to be subjected to the UV-irradiation curing principle to carry out the material moulding that adds up.Mainly contain two kinds of photocuring moulding modes at present: laser photocuring rapid shaping mode, uviol lamp photocuring moulding mode.
Rapid laser-shaping technique is moving to maturity.It need use expensive ultraviolet laser and galvanometer scanning system, and equipment cost and operating cost are very high.The model that the laser photocuring rapid shaping is made, its formed precision is subjected to the galvanometer scanning system accuracy limitations, and this molding mode only is applicable to the manufacturing mini Mod; When manufacturing large-sized model,, and be difficult for revising, have a strong impact on the precision of model because the picture distortion that the intrinsic factor of scanner itself causes is very big.
Existing uviol lamp photocureable rapid shaping adopts the general ultraviolet mercury lamp as light source, compare with laser light source and to have reduced cost, but the spectrum that ultraviolet mercury lamp produced is LINEAR CONTINUOUS spectrum, and few part light radiation of having only the absworption peak wavelength value with photosensitive resin to match is used for photocuring effectively.
Summary of the invention
The object of the present invention is to provide a kind of quick molding method for energy following point scanning and photo-curing, it is the light source that causes photocuring reaction with UV LED (UV-LED), can significantly reduce the equipment cost of photocureable rapid shaping, and then reduce product cost; And can improve the precision of photocureable rapid shaping by energy following.
In order to achieve the above object, the present invention is achieved by the following technical solutions.A kind of energy following point scanning and photo-curing forming method is characterized in that, is the light source that causes photocuring reaction with UV-LED, focuses on the light-cured resin liquid level by focus lamp; UV-LED and focus lamp are done the planar point scanning motion under the drive of two-dimentional work bench, finish the two-dimensional scan moulding of part when anterior layer; In the acceleration and the decelerating phase of scan line, the operating current of UV-LED is according to the change of sweep speed and follow variation in real time.
Further characteristics of the present invention are:
The operating current of described UV-LED is according to the change of sweep speed and follow variation in real time according to direct proportion.
The ultraviolet light wavelength that the optical absorption peak wavelength value and the UV-LED of described light-cured resin send is consistent.
The wave-length coverage of described UV-LED is 200～400nm.
The wave-length coverage of described UV-LED is 360～370nm, and the optical absorption peak wavelength value of light-cured resin is 365nm.
The present invention serves as the light source that causes photocuring reaction with UV LED (UV-LED), and this light source belongs to cold light source, and monochromaticjty is good, and power is big, and the life-span is long; Laser light source with costliness is compared, and has greatly reduced the equipment cost of photocuring moulding, and then has reduced product cost; Common uv lamp with former uviol lamp photocureable rapid shaping is compared, except that the light source cost significantly reduces, the high-purity ultraviolet light wavelength that the optical absorption peak wavelength value and the LED of light-cured resin sends is consistent, the ultraviolet light that LED sends is fully effectively utilized, and has greatly reduced equipment heating and energy consumption.
The present invention is in the acceleration and the decelerating phase of scan line, and the operating current of UV-LED is followed variation in real time according to the change of sweep speed, makes that the curing energy even on the scan line distributes, and has improved scanning accuracy.
Description of drawings
Fig. 1 is an energy following point scanning rapid molding device schematic diagram of the present invention, among the figure: 1, UV-LED light source, 2, focus lamp, 3, Z axle lifting platform, 4, resin storage tank, 5, light-cured resin.
Fig. 2 is the operating current of UV-LED and the graph of a relation of focal beam spot sweep speed.
The specific embodiment
With reference to Fig. 1, the energy following point scanning rapid molding device mainly comprises: UV-LED light source 1, focus lamp 2, Z axle lifting platform 3, resin storage tank 4, light-cured resin 5 and two-dimentional work bench, computer.The camera lens that UV-LED light source 1 and focus lamp 2 are formed is fixed on the two-dimentional work bench, drive focus lamp by the computer control two-dimentional work bench and do the motion of X-Y direction plane, thereby make the focal beam spot of camera lens do two-dimentional rapid shaping spot scan campaign at the light-cured resin liquid level.After this layer of scanning was finished, bed thickness of computer control Z axle lifting platform 3 declines began the scanning of one deck down, so successively adds up, and realizes the rapid shaping manufacturing of whole part.Realize rapid molding device of the present invention, on the basis of former ultraviolet light rapid molding device, replace original ultraviolet mercury lamp, as the light source that causes photocuring reaction with UV LED (UV-LED); The size of current of real time computer control UV-LED, thus its power output controlled, promptly export energy, make it follow the variation of the sweep speed (being the sweep speed of focal beam spot) of sweep mechanism in real time according to direct proportion.When the directly proportional coefficient is normal scan, the electric current of UV-LED and the ratio of sweep speed.
Method of the present invention is: be the light source that causes photocuring reaction with UV-LED, focus on the resin liquid level by focus lamp; UV-LED and focus lamp are done the planar point scanning motion under the drive of two-dimentional work bench, finish the two-dimensional scan moulding of part; In the acceleration and the decelerating phase of two-dimensional scan, the operating current of UV-LED is according to the change of sweep speed and follow variation in real time.
Be specially: UV-LED and focus lamp are being done the planar point scanning motion more than the resin liquid level under the drive of two-dimentional work bench, operating current size and the break-make of computer control UV-LED, realize the variation of following of focal beam spot energy and sweep speed, on the light-cured resin liquid level, form the uniform all the time resin solidification line of width, the degree of depth.After this layer of scanning is finished, the Z axle lifting platform bed thickness that in resin storage tank, descends, strickle begins the scanning of new one deck after wipeing off.
With reference to Fig. 2, essence of the present invention is energy following.In energy following, adopt the power supply of controlled transient response dc source as UV-LED, output current (being the operating current of UV-LED) size by the computer control power supply, make the direct ratio that is varied to of energy size with the sweep speed of UV-LED focal beam spot, guarantee that the light exposure in the solidification process is even, thereby improved part accuracy.Its detailed process is: at scan line starting point boost phase, sweep speed accelerates to setting value from zero, makes the direct ratio that is varied to of energy size with the sweep speed of focal beam spot by the output current size of control power supply, tapers to ceiling capacity from zero.After sweep speed reached setting value, UV-LED guaranteed stable energy output with constant power work.In the time of near focal beam spot arrives the scan line terminal point, enter the decelerating phase, promptly decelerate to zero gradually from setting sweep speed, this moment is by the output current size of computer control power supply, make the direct ratio that is varied to of the energy of focal beam spot and sweep speed, and be gradually reduced to zero from ceiling capacity.
In the practical application, the ultraviolet light wavelength that the optical absorption peak wavelength value and the UV-LED of light-cured resin send is consistent, and the absorption efficiency of ultraviolet light is the highest.Generally speaking, the wave-length coverage of selecting UV-LED for use is 360～370nm, and the optical absorption peak wavelength value of cured resin is 355～370nm.
Claims (5)
1. an energy following point scanning and photo-curing forming method is characterized in that, is the light source that causes photocuring reaction with UV-LED, focuses on the light-cured resin liquid level by focus lamp; UV-LED and focus lamp are done the planar point scanning motion under the drive of two-dimentional work bench, finish the two-dimensional scan moulding of part when anterior layer; In the acceleration and the decelerating phase of scan line, the operating current of UV-LED is according to the change of sweep speed and follow variation in real time.
2. a kind of energy following point scanning and photo-curing forming method according to claim 1 is characterized in that, the operating current of described UV-LED is according to the change of sweep speed and follow variation in real time according to direct proportion.
3. a kind of energy following point scanning and photo-curing forming method according to claim 1 is characterized in that the wavelength value of the ultraviolet light that the optical absorption peak wavelength value and the UV-LED of described light-cured resin sends is consistent.
4. a kind of energy following point scanning and photo-curing forming method according to claim 1 is characterized in that the wave-length coverage of described UV-LED is 200～400nm.
5. a kind of energy following point scanning and photo-curing forming method according to claim 1 is characterized in that the wave-length coverage of described UV-LED is 360～370nm, and the optical absorption peak wavelength value of light-cured resin is 365nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100215727A CN101537711B (en) | 2009-03-17 | 2009-03-17 | Quick molding method for energy following point scanning and photo-curing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100215727A CN101537711B (en) | 2009-03-17 | 2009-03-17 | Quick molding method for energy following point scanning and photo-curing |
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| Publication Number | Publication Date |
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| CN101537711A CN101537711A (en) | 2009-09-23 |
| CN101537711B true CN101537711B (en) | 2011-02-09 |
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| CN2009100215727A Expired - Fee Related CN101537711B (en) | 2009-03-17 | 2009-03-17 | Quick molding method for energy following point scanning and photo-curing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103921445B (en) * | 2014-05-04 | 2016-06-08 | 中山市东方博达电子科技有限公司 | Photocuring 3D Method of printing and photocuring 3D print system |
| CN104959602B (en) * | 2015-07-11 | 2017-12-29 | 新疆熠金能源科技有限公司 | Utilize the dot matrix 3D printing light source of light emitting diode |
| CN105172141A (en) * | 2015-09-10 | 2015-12-23 | 杜晖 | Photosensitive resin 3D printer taking LED array as light source |
| DE102015014964A1 (en) * | 2015-11-20 | 2017-05-24 | Voxeljet Ag | Method and apparatus for 3D printing with narrow wavelength spectrum |
| CN105904727A (en) * | 2016-04-19 | 2016-08-31 | 周宏志 | DLP-based photocuring 3D printing forming method, system and device |
| DE102017213720A1 (en) * | 2017-08-07 | 2019-02-07 | Eos Gmbh Electro Optical Systems | Optimized segmentation process |
| CN110435136A (en) * | 2019-08-06 | 2019-11-12 | 武汉卫亚汽车零部件有限公司 | A kind of integrally formed technique of automotive seat connecting rod |
| CN110421845A (en) * | 2019-08-06 | 2019-11-08 | 岭南师范学院 | A kind of high-precision SLA laser 3D printing machine based on parallel mechanism structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1221371A (en) * | 1996-04-19 | 1999-06-30 | Q2100有限公司 | Method and apparatus for curing ophthalmic lenses using ultraviolet light and improved cooling |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1221371A (en) * | 1996-04-19 | 1999-06-30 | Q2100有限公司 | Method and apparatus for curing ophthalmic lenses using ultraviolet light and improved cooling |
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