CN209350891U - 3D printer - Google Patents
3D printer Download PDFInfo
- Publication number
- CN209350891U CN209350891U CN201821417563.0U CN201821417563U CN209350891U CN 209350891 U CN209350891 U CN 209350891U CN 201821417563 U CN201821417563 U CN 201821417563U CN 209350891 U CN209350891 U CN 209350891U
- Authority
- CN
- China
- Prior art keywords
- laser
- printer
- projection
- dmd chip
- workbench
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of 3D printer, including projection-type laser heating system, and the projection-type laser heating system includes for being laid with the workbench of powder body material, mode of laser group, projecting subassembly and control system;The mode of laser group includes infrared laser and the laser regulating device for adjusting the infrared laser output power;The projecting subassembly includes the dmd chip that the laser beam after adjusting the laser regulating device projects to workbench to heat to the powder body material being layed on the workbench;The control system controls the projection of shape of the laser regulating device and the dmd chip.Technical solutions of the utility model can use dmd chip and carry out laser projection heating and then realize melting or sintering powder body material progress 3D printing.
Description
The application is 201820171996.6 divisional application, the applying date of parent application: on January 30th, 2018;Application
It number is 201820171996.6;Invention and created name is 3D printer.
Technical field
The utility model relates to 3D printing field, in particular to a kind of 3D printer.
Background technique
After beam of laser is realized from the Theodore Maiman in nineteen sixty California, USA Hughes laboratory, because
The characteristic of laser itself, is rapidly developed it in multiple fields, until nineteen ninety laser is applied to manufacturing industry, has only used 30
Year.The manufacturing industry that is introduced as of laser brings new life, and reluctant fine processing problems all may be used in traditional manufacture
Perfectly to be solved using laser.
3D printing technique is developed from 1986 American scientist Charles Hull after First business 3D printing machine
Develop and bring a new direction to manufacturing industry, with development in recent years, the product that 3D printing can be used is more and more, 3D
It is also more and more extensive to print the production field set foot in.Wherein, the digital light processing skill of DLP (Digital Light Processing)
Art can carry out the molding processing of 3D after being applied to 3D printing to liquid photosensitive resin, and DLP plane projection radiation can make light
Quick resin rapid shaping, print speed is fast, but DLP shadow casting technique used in 3D printing at present can only carry out for photosensitive resin
Cold work cannot heat material, and the scope of application is narrow, and material cost is high;There are also SLS (Selected
Laser Sintering) selective laser melts or sintering technology, and the raw material of 3D printing is dusty material, is carried out to dusty material
Point is fused or sintered by, and makes its solidification, is needed for dusty material to be heated to molten condition, is taken out after solidification is cooling.SLS technology
Plurality of raw materials can be applicable in 3D printing, but SLS technology is point type heating, path scanning is longer heating cycle, restricts 3D
The promotion of the efficiency of printing.
Utility model content
The main purpose of the utility model is to propose a kind of 3D printer, it is intended to solve DLP shadow casting technique in 3D printer
The application in field is confined to Weak ultraviolet irradiation liquid photosensitive resin curing molding, is not applied for melting dusty material
Or the situation of sintering curing.
To achieve the above object, the utility model proposes 3D printer include projection-type laser heating system, the throwing
Shadow formula laser heating system includes workbench, mode of laser group, projecting subassembly and control system;The mode of laser group includes infrared sharp
Light device and laser regulating device for adjusting the infrared laser output power;The projecting subassembly includes by the laser
Laser beam after regulating device is adjusted projects to workbench to heat the powder body material being laid on the workbench
Dmd chip;The control system controls the projection of shape of the laser regulating device and the dmd chip.
Preferably, the laser regulating device includes the first half-wave plate and polarization spectroscope, and the polarization spectroscope has
First exit direction and the second exit direction, and the laser beam that the laser generates is divided into first by the polarization spectroscope
Laser components and second laser component, wherein the second exit direction is equipped with power meter, the first exit direction is directed toward the projection
Component.
Preferably, the first half-wave plate component is including the first half-wave plate and for fixing first half-wave plate and drive
First rotation clamp assemblies of first half-wave plate rotation, the first rotation clamp assemblies include level-one rotating clamp fastener and
Second level rotating clamp fastener, the half-wave plate are fixed on the level-one rotating clamp fastener, and the level-one rotating clamp fastener can be rotated
Be connected to the second level rotating clamp fastener, the angular resolution of the level-one rotating clamp fastener is greater than the second level rotating clamp fastener
Angular resolution.
Preferably, the 3D printer further includes the second half-wave plate and the second rotation clamp assemblies, second half-wave plate
The second rotation clamp assemblies are installed on, the second rotation clamp assemblies are set to the polarization spectroscope and the projection group
Between part, the control system control second rotation clamp assemblies and the first rotation clamp assemblies cooperation, with control
The polarization direction of the incident light of the dmd chip is parallel to the micro mirror reflecting surface of the dmd chip.
Preferably, the 3D printer further includes beam splitting microscope group, and the projecting subassembly includes at least 3 groups;The beam splitter
Be mounted between the mode of laser group and the projecting subassembly, by the mode of laser group export laser beam be divided into it is described
Corresponding at least 3 beams of projecting subassembly.
Preferably, the control system individually control every group described in projecting subassembly dmd chip, it is each described to control
The shape of the projection plane of dmd chip and direction make each dmd chip project to the shape on the workbench identical simultaneously
And it is overlapped.
Preferably, radiator is equipped on each dmd chip, each radiator includes liquid nitrogen circulation
Cooling line and the heat-conducting block for being attached at the dmd chip, each heat-conducting block offer through-hole, and the through-hole connects institute
State liquid nitrogen circulating cooling pipeline.
Output light source of the technical solutions of the utility model by using infrared laser as heating, and pass through dmd chip
Workbench is projected a laser onto, the calorific value of dmd chip is reduced, allows to be used in projection heating system, Jin Ershi
Now the 3D printing that material is fused or sintered by is carried out using projection-type laser heating system.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of the utility model projection-type laser heating system.
Drawing reference numeral explanation:
Label | Title | Label | Title |
100 | Infrared laser | 300 | Projecting subassembly |
200 | First half-wave plate | 301 | Dmd chip |
201 | First rotation clamp assemblies | 302 | Heat-conducting block |
202 | Polarization spectroscope | 400 | Workbench |
203 | Power meter | 401 | Preheating device |
204 | Expand microscope group | 500 | Control equipment |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that if related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction is only used for explaining opposite between each component under a certain particular pose (as shown in the picture)
Positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, if relating to the description of " first ", " second " etc. in the utility model embodiment, " first ", " the
Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning
The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one
A this feature.It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not within the protection scope of the requires of the utility model.
3D printing technique is increasingly mature, and application also gradually starts generally, and in 3D printing field, application is than wide now
Be using DLP projecting ultraviolet light irradiate liquid photosensitive resin, solidify the photosensitive resin in irradiated area, after multiple layers of cured
Form 3D printing product.The core of DLP projection is dmd chip, and DMD chip has many micro mirror reflecting surface (micro mirror reflectings surface
Quantity it is related with resolution ratio, for example, then theoretically at least needing 4096 × 2160=if you need to the image for being projected out 4K resolution ratio
8847360 micro mirror reflectings surface), the controller of DMD can individually control the direction of each micro mirror reflecting surface, and accurate projection goes out to need
The figure wanted.DLP shadow casting technique is mainly used in domestic or commercial projection, such as common projector and the throwing occurred in recent years
Shadow TV etc..DLP shadow casting technique may be implemented quickly and accurate 3D printing in 3D printing field, but because the core that DLP is projected
Center portion part dmd chip is more to the absorption of light, and when the power of projected light is larger, dmd chip can fail because of high temperature, so, mesh
Application of the preceding DLP shadow casting technique in 3D printing is only limitted to use liquid photosensitive resin as the case where printing raw material, discomfort
For using dusty material to carry out melting or sintering curing to realize the situation of 3D printing.For this purpose, the utility model proposes one
Kind projection-type laser heating system, to extend application range of the DLP shadow casting technique in 3D printing.
Fig. 1 is please referred to, is melted and be sintered heating using projection-type laser heating system the utility model proposes a kind of
3D printer, projection-type laser heating system therein include infrared laser 100, for adjust infrared laser 100 throw
The laser power regulating device of shadow output power, for by through the laser power regulating device adjusting after laser beam be divided into
The beam splitting microscope group of multi beam, the projecting subassembly 300 for projecting the laser beam after beam splitter beam splitting and be equipped with preheating
The workbench 400 of device 401;Wherein, the laser power regulating device includes the first rotation clamp assemblies 201, power meter 203
The first half-wave plate 200 and polarization spectroscope 202 successively arranged in the same direction;First half-wave plate 200 is mounted on
On the first rotation clamp assemblies 201;The power meter 203 is located at the side of the polarization spectroscope 202;The projection group
Part 300 is no less than three groups;The projecting subassembly 300 is respectively arranged on the exit direction of the beam splitting microscope group, and every group of projecting subassembly
300 include a dmd chip 301;The projection-type laser heating system further includes control system, and the control system controls institute
The first rotation clamp assemblies 201 and the DMD chip 301 are stated, and individually control the projection of shape of each dmd chip 301
And direction so that each dmd chip 301 project to the shape on workbench 400 it is identical and be overlapped.
Specifically, the laser in the present embodiment uses the laser of infrared band, and exporting laser is linearly polarized photon.
After through half-wave plate, polarization direction can rotate linear polarized light, and rotating angle is incident light polarization direction and half
Twice of wave plate optical axis included angle.Therefore the rotation that can use half-wave plate changes the polarization direction of linear polarized light.Polarization spectro
Linear polarized light can be divided into two beams by mirror 202, and a branch of is the first laser component propagated along former direction, and another beam is to deviate original
The second laser component in direction, wherein the power of first laser component is effective heating output power, is not considering loss
In the case of, the sum of power of first laser component and second laser component is equal to the function for being incident on the light beam of polarization spectroscope 202
Rate.Power meter 203 detects the power of second laser component, and effective output work of first laser component is obtained according to general power
Rate, and the ratio of first laser component and second laser component depends on the polarization side for being incident on the light beam of polarization spectroscope 202
To the angle with 202 interface of polarization spectroscope, therefore can be by changing the optical axis of half-wave plate and the folder in incident light polarization direction
Angle changes the output power of first laser component.The present embodiment is using the first half-wave plate 200 and the first rotation clamp assemblies
201, under control of the control system, the first rotation clamp assemblies 201 drive the rotation of the first half-wave plate 200, to change the first half
The direction of 200 optical axis of wave plate to change the polarization direction of laser beam, and then changes first using polarization spectroscope 202 and swashs
The output power of light component.
In other embodiments, referring again to Fig. 1, expansion can also be increased between polarization spectroscope 202 and beam splitting microscope group
Beam microscope group 204, first laser component after power regulation are swashed by expanding the diameter of 204 expanded light beam of microscope group with reducing by first
The power density of light component.First laser component is expanded after microscope group 204 expands, then is split through beam splitting microscope group, by first
Laser components are divided into multi beam, further decrease the power density of every beam laser components, but keep the total of first laser component simultaneously
Power is constant.First laser component after projecting subassembly 300 and beam splitting is correspondingly arranged multiple groups, and every group of projecting subassembly 300 includes
One dmd chip 301 all projects every beam laser components of first laser component on workbench 400.On workbench 400
Preheating device 401 is set, the dusty material to be processed for being layed in workbench is preheated.
The present embodiment projection heating system has a control equipment 500, which is uniformly controlled projection and adds
Hot systems.
The control of control and dmd chip 301 that control system integration laser power is adjusted.Control system is according to preset
The rotation of laser output power control the first rotation clamp assemblies 201, the second laser component detected according to power meter 203
Whether the power of power confirmation first laser component reaches preset value.The polarization direction for the laser that laser itself generates and power
Fixed, when the first rotation clamp assemblies 201 are in initial position, the power of first laser component is minimum, that is to say control system
It is gradually increased laser power regulating device is controlled when effective output minimum;Control system individually controls each DMD
The micro mirror reflecting surface of chip 301.Dmd chip 301 project shape determined by the inclined direction of micro mirror reflecting surface, dmd chip 301
Micro mirror reflecting surface quantity it is more, the resolution ratio of projecting figure is higher.The each dmd chip of the present embodiment 301 is in workbench
Projecting figure on 400 is identical, and the micro mirror reflecting surface that control system controls each dmd chip 301 makes each dmd chip 301 exist
Projecting figure on workbench 400 is completely coincident.
In other embodiments, projection-type laser heating system can also be adjusted using infrared laser 100, laser power
Device, projecting subassembly 300 are used as one group of laser output source, and multiple groups laser output source, and every group of laser output is arranged in whole system
Projecting figure of the source on workbench 400 is completely coincident.
Technical solutions of the utility model are made by using the laser light source positioned at infrared band that infrared laser 100 generates
For energy output source, the micro mirror reflecting surface of dmd chip 301 can be effectively reduced to the absorption of laser to reduce high power light source
When directive MD chip, the fever of dmd chip 301.The micro mirror reflecting surface of dmd chip 301 is using metallic aluminium, metallic aluminium pair
The reflectivity of electromagnetic wave increases with the increase of electromagnetic wavelength, in infrared band, the theoretic reflection of high purity metal aluminium
Rate can achieve 100%, that is to say that absorptivity is zero.But in industrial application, it is difficult to reach ideal conditions, even if dmd chip 301
The laser for projecting infrared band, still can have certain absorption, but its to the absorptivity of infrared band electromagnetic wave much
Lower than visible light can ultraviolet band absorptivity, therefore, using infrared laser as projection input light source, dmd chip 301 because
Absorb and caused by power loss well below using ultraviolet band as input light source when power loss.Projection heats
Heating to a region, the power needed is very high, the maximal input of significantly larger than routine DLP projection, and restricts DLP throwing
One critically important factor of the brightness of shadow is exactly the heating problem of dmd chip 301, as most accurate optical element, DMD core
Piece 301 is to famous with " enervated ", and maximum operating temperature only has tens degree, using the laser illumination DMD of conventional heating
301 moment of dmd chip can be melted, can not be projected laser by dmd chip 301 at all by chip 301.This implementation
Use the laser light source of example is infrared laser light source, and through expanding microscope group 204 expand with after the beam splitting of beam splitting microscope group,
Its optical power density density greatly reduces, at the same time, in addition high reflectance of the dmd chip 301 to infrared light, in the present embodiment
The laser beam of high power infrared band is irradiated to after dmd chip 301, and dmd chip 301 can only absorb few a part of energy
Amount, radiate by achievable radiating mode keeps dmd chip 301 when continuing working, and temperature is not higher than
Maximum tolerable temperature can keep working normally.
In addition, to further decrease the fever of dmd chip 301, preheating device is arranged on workbench 400 in the present embodiment
401 pairs of raw materials to be heated carry out the pre-heat treatment, and the temperature of raw material is heated, and the temperature of raw material is made to be in melting or burn
Within the scope of one below of junction temperature, such as the temperature of raw material can be heated to arrive than melting or low 10 DEG C of sintering temperature
DEG C, only need lower power quick in this way, laser projection heating improves material temperature to melting or sintering temperature
It realizes, it, can be using the lower laser light source of power as output source, with into one to reduce requirement to laser light source power
Step reduces the calorific value of DMD chip 301.
The first laser component projected through polarization spectroscope 202 is linear polarized light, and reflecting medium is to linear polarized light
Reflectivity and incidence angle and polarization direction are related with the angle of reflecting surface, and when polarization direction is parallel to reflecting surface, absorptivity is most
It is low, reflectivity highest.
After process expands microscope group 204 and beam splitting microscope group, the polarization direction of every beam first laser component can be varied,
And according to the setting position of dmd chip 301, with dmd chip 301 when every beam first laser component is irradiated on dmd chip 301
The angle of micro mirror reflecting surface can difference, for expanding microscope group 204 and beam splitting microscope group to the polarization side of first laser component
To influence and when position and the angle of each DMD chip 301 are targetedly set, can be by adjusting polarization spectroscope 202
Angle, make its every beam first laser component of synchronous adjustment in a manner of the rotation of the optical path shaft of first laser component, make through
Its polarization direction and corresponding DMD core when being irradiated on dmd chip 301 per a branch of first laser component after beam splitter group beam splitting
Angle between the micro mirror reflecting surface of piece 301 is zero, and then further increases the reflectivity of micro mirror reflecting surface.For this purpose, this is practical
Novel another embodiment of proposition, by the way that the second half-wave plate and drive described second are arranged in the optical path of every beam first laser component
Half-wave plate individually adjusts in such a way that the optical path of corresponding every beam first laser component is the second rotation clamp assemblies that axis rotates
Angle between the polarization direction of every beam first laser component and the micro mirror reflecting surface of corresponding dmd chip 301 makes per a branch of first
When laser components are injected into dmd chip 301, polarization direction is parallel with the micro mirror reflecting surface of dmd chip 301.
When heating to dusty raw materials, the excessively high fineness that will affect melting or be sintered edge of temperature is made
At excessive melting or it is sintered in finished surface formation burr, and too low will lead to of temperature is unable to complete melting within a preset time
Or sintering, so that finished surface is generated notch, therefore projection-type laser heating system needs to carry out accurately the power of projection laser
Control, the utility model proposes another embodiment, the first rotation clamp assemblies 201 in the present embodiment include level-one rotation clamping
Device and second level rotating clamp fastener;First half-wave plate 200 is fixed on level-one rotating clamp fastener, and level-one rotating clamp fastener is rotatable
It is connected to the second level rotating clamp fastener, and the angular resolution of level-one rotating clamp fastener is greater than the angle of the second level rotating clamp fastener
Resolution ratio.
In one timing of power of infrared laser 100 itself, the rotation of the first half-wave plate 200 determines that the utility model is sent out
The effective output of projection-type laser heating system drives the rotation of the first half-wave plate 200 by the rotation of the first clamp assemblies
Turn the adjusting of realization output power, the control precision of rotational angle determines the accuracy of laser output power, real to reduce
The deviation of the laser power and preset value that are now irradiated on workbench 400 needs accurately to adjust the rotation angle of the first half-wave plate 200
Degree.The present embodiment is by way of being arranged the rotating clamp fastener of two-stage difference angular resolution, in the feelings for meeting quick regulation power
Under condition, and the power regulation of fining may be implemented, to reduce the deviation of real output and preset value, increases workbench
The fineness that edges of regions is melted or be sintered on 400, avoids the generation of finished surface burr and notch.
The dmd chip 301 of the utility model is only used for first laser component projecting workbench by way of reflection
On 400, and the micro mirror reflecting surface of dmd chip 301 can only be in ± 12 ° of two location deflections with 301 surface of dmd chip, because
This is when the whole micro mirror reflecting surface of a dmd chip 301 is in 12 ° of angle states with 301 surface of DMD chip, projecting direction
For the first projecting direction, corresponding view field is the first view field, when whole micro mirror reflectings surface with 301 table of dmd chip
When face is in -12 ° of angles, projecting direction is the second projecting direction, and corresponding view field is the second view field.The utility model
First view field of each DMD chip 301 in workbench 400, also, by be arranged DMD specific location make it is each
First view field each of on workbench 400 of dmd chip 301 is completely coincident.Control system can individually control each DMD
Projecting figure of the chip 301 on workbench 400, and make projecting figure overlapping of each dmd chip 301 on workbench 400.
At this point, there is the projecting figure on workbench 400 with first view field's area ratio for corresponding every beam first laser component
Imitate the ratio between heating power and first laser component power, in the case where first laser component power is constant, 400 upslide of workbench
The projection power density of shadow figure is constant.If first laser component power is P, view field's area on workbench 400 is S,
The area that the figure on workbench 400 is projected in work is S0, then, the optical power density on workbench 400 is projected to are as follows: ρ
=P/S, and the rate of heat addition is proportional to power density.At this point, the power projected in the second view field is P1=P- ρ S0, in reality
In the work of border, S under normal conditions0Less than (S-S0), it that is to say under normal conditions, the power of the second view field of projection, which is greater than, to be thrown
Power of the shadow to the first view field.
This part projects to the power of the second view field other than causing waste, also will affect entire projection-type laser
Heating system, it is therefore desirable to which the light beam of the second view field of projection is handled.Delustring component is arranged in the present embodiment, for disappearing
Except the light beam for projecting to the second view field.The form that can be specifically combined using reflecting assembly and light absorption component, light absorption
Component is sticked in the bottom of workbench 400, and the plane or curved reflector of multiple groups can be set in reflecting assembly, by dmd chip 301
The light beam for projecting to the second view field is reflected on light absorption component, and light absorption component absorbs temperature after this segment beam energy
It increases, for the bottom of heating station 400, can be used as auxiliary heating, this partial capability is used, workbench is made
The melting or sintering of powder raw material are quicker on 400.
In the above-described embodiments, it can be used for melting or being sintered conventional powder material for realization projection-type laser heating system
Material reduces the light absorption of dmd chip 301 using the laser of infrared band wavelength, and it is close to increase lasing beam diameter reduction optical power
Degree, further decreases optical power density using beam splitting microscope group, to realize that DMD chip 301 can be within the scope of normal working temperature
Powerful laser projection is realized, but for some material to be processed such as cermets resistant to high temperature etc., if realizing metal and pottery
The melting or sintering of the heat-resisting materials such as porcelain need more powerful laser to export, at this point, the temperature difficulty or ease of dmd chip 301 are tieed up
It holds within the scope of normal working temperature, the present embodiment radiates to dmd chip 301 using liquid nitrogen circulating cooling system, liquid nitrogen
Circulating cooling system includes the heat-conducting block 302 set on 301 back of dmd chip, and through-hole is equipped in heat-conducting block 302, and through-hole connects liquid
Nitrogen cycle pipeline.When 301 temperature of dmd chip, which will be increased to, to exceed normal working temperature range, control system controls liquid nitrogen
The circulatory system starts liquid nitrogen circulation.Liquid nitrogen cooling back installation is equipped with fluid reservoir and circulating pump, when starting circulation, liquid nitrogen quilt
It is pumped into circulation line, is quickly passed out the heat generated on dmd chip 301 by heat-conducting block 302, is followed when terminating liquid nitrogen
When ring, the liquid nitrogen reflux in pipeline enters fluid reservoir.The pipeline of circulation line is bilayer in the present embodiment, and internal layer is flowed for liquid,
Interlayer is equipped between outer layer and internal layer, to prevent outer layer pipe condensation or frosting when starting circulation.The present embodiment uses simultaneously
CO2Pulse laser, CO2The optical maser wavelength of laser is 10.6 μm, and the aluminum micro mirror reflecting surface of dmd chip 301 is theoretically
100% can achieve to 10.6 μm of ELECTROMAGNETIC RADIATION REFLECTION rate, the heat that dmd chip 301 can be made to assemble is less;And use arteries and veins
The mode of punching carry out heating be because wait melt or agglomerated material is powdered, itself thermally conductive poor on workbench 400,
Pulse type laser still can make it is fusion melt or agglomerated material temperature rises to melting or sintering temperature, and dmd chip 301 is thermally conductive
Property it is good, dusty material to be processed can equally melted or when sintering, pulse type laser is more conducive to the guarantor of DMD chip 301
Hold lower temperature.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
Under all utility models in the utility model are conceived, equivalent structure made based on the specification and figures of the utility model
Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (14)
1. a kind of 3D printer, which is characterized in that the 3D printer includes projection-type laser heating system, and the projection swashs
Light heating system includes:
Workbench, for being laid with powder body material;
Beam splitting microscope group;
Projecting subassembly, positioned at the exit direction of the beam splitting microscope group, the projecting subassembly includes dmd chip, and the dmd chip is used
In laser beam is projected to the workbench, to be heated to the powder body material being laid on the workbench;
Control system, for controlling the projection of shape of the dmd chip.
2. 3D printer as described in claim 1, which is characterized in that the projection-type laser heating system further includes beam expanding lens
Group, the beam splitting microscope group are located at described expand between microscope group and the projecting subassembly.
3. 3D printer as claimed in claim 1 or 2, which is characterized in that the projection-type laser heating system further includes swashing
Optical power adjusting regulating device, for adjusting laser projection output power.
4. 3D printer as claimed in claim 3, which is characterized in that the laser power regulating device includes polarization spectro
Mirror, the polarization spectroscope have the first exit direction and the second exit direction, and first exit direction is directed toward the projection
Component.
5. 3D printer as claimed in claim 4, which is characterized in that second exit direction is equipped with power meter.
6. 3D printer as claimed in claim 4, which is characterized in that the laser power regulating device further includes the first half-wave
Piece is used to fix first half-wave plate and drives the first rotation clamp assemblies of the first half-wave plate rotation, the polarization point
Light microscopic is between first half-wave plate and the beam splitting microscope group.
7. 3D printer as claimed in claim 6, which is characterized in that the first rotation clamp assemblies include level-one rotating clamp
Holder and second level rotating clamp fastener, first half-wave plate are fixed on the level-one rotating clamp fastener, the level-one rotating clamp
Holder is rotatablely connected with the second level rotating clamp fastener.
8. 3D printer as claimed in claim 7, which is characterized in that the angular resolution of the level-one rotating clamp fastener is greater than institute
State the angular resolution of second level rotating clamp fastener.
9. 3D printer as described in claim 1, which is characterized in that the projection-type laser heating system further includes laser
Device, the laser are infrared laser.
10. 3D printer as claimed in claim 9, which is characterized in that the infrared laser is CO2Laser.
11. 3D printer as claimed in claim 10, which is characterized in that the CO2Laser is CO2Pulse laser.
12. 3D printer as described in claim 1, which is characterized in that the projecting subassembly includes at least 3 groups, the beam splitting
Microscope group is used to laser beam being divided at least 3 beams corresponding with the projecting subassembly.
13. 3D printer as claimed in claim 12, which is characterized in that the control system individually control every group described in projection
The dmd chip of component makes each dmd chip project to institute to control projection of shape and the direction of each dmd chip
It is identical and be overlapped to state the shape on workbench.
14. 3D printer as described in claim 1, which is characterized in that preheating device is arranged on the workbench, for treating
The raw material of heating carries out the pre-heat treatment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201821417563.0U CN209350891U (en) | 2018-01-30 | 2018-01-30 | 3D printer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820171996.6U CN208392651U (en) | 2018-01-30 | 2018-01-30 | 3D printer |
CN201821417563.0U CN209350891U (en) | 2018-01-30 | 2018-01-30 | 3D printer |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201820171996.6U Division CN208392651U (en) | 2018-01-30 | 2018-01-30 | 3D printer |
Publications (1)
Publication Number | Publication Date |
---|---|
CN209350891U true CN209350891U (en) | 2019-09-06 |
Family
ID=65066095
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201821426692.6U Active CN208946685U (en) | 2018-01-30 | 2018-01-30 | 3D printer |
CN201821415307.8U Active CN208946684U (en) | 2018-01-30 | 2018-01-30 | 3D printer |
CN201821417563.0U Active CN209350891U (en) | 2018-01-30 | 2018-01-30 | 3D printer |
CN201820171996.6U Active CN208392651U (en) | 2018-01-30 | 2018-01-30 | 3D printer |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201821426692.6U Active CN208946685U (en) | 2018-01-30 | 2018-01-30 | 3D printer |
CN201821415307.8U Active CN208946684U (en) | 2018-01-30 | 2018-01-30 | 3D printer |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201820171996.6U Active CN208392651U (en) | 2018-01-30 | 2018-01-30 | 3D printer |
Country Status (1)
Country | Link |
---|---|
CN (4) | CN208946685U (en) |
-
2018
- 2018-01-30 CN CN201821426692.6U patent/CN208946685U/en active Active
- 2018-01-30 CN CN201821415307.8U patent/CN208946684U/en active Active
- 2018-01-30 CN CN201821417563.0U patent/CN209350891U/en active Active
- 2018-01-30 CN CN201820171996.6U patent/CN208392651U/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN208392651U (en) | 2019-01-18 |
CN208946685U (en) | 2019-06-07 |
CN208946684U (en) | 2019-06-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3645262B2 (en) | Multiple beam laser sintering | |
CN108248026A (en) | Projection-type laser heating system and 3D printer | |
JP5792720B2 (en) | Imaging assembly | |
JPH0811224A (en) | Manufacture and manufacturing device of microlens | |
CN106498387A (en) | Laser cladding apparatus based on the pre- hot-working slow cooling power of liquid crystal modulation | |
CN206204424U (en) | A kind of laser cladding equipment that pre- hot-working slow cooling power is modulated based on polarization compensator | |
CN209350891U (en) | 3D printer | |
CN106711765B (en) | A kind of semiconductor laser cladding light-source structure with three hot spots irradiation one-pass molding function | |
CN109633795A (en) | A method of quickly preparing uniform, controllable microlens array using picosecond laser | |
CN208713121U (en) | Laser head angle adjustment device for the direct output laser of semiconductor | |
CN101644828A (en) | Paraboloidal mirror light-concentration system of replaceable partially reflecting surface | |
CN113182533B (en) | Laser heating 3D printing system and control method thereof | |
CN112643056B (en) | Surface scanning type laser additive manufacturing device based on double-pulse light source illumination | |
WO2022000767A1 (en) | 3d printing laser processing module based on digital light processing | |
CN211441187U (en) | Projection type 3D printer | |
CN211074709U (en) | Projection type 3D printer | |
CN106696263B (en) | A kind of 3D printing laser knot burner | |
CN104345578A (en) | Shutter blade of photo-etching machine | |
CN209350892U (en) | Laser projection system and 3D printer | |
JP4978431B2 (en) | Radiation heating device thermal uniformity adjustment structure | |
CN104816060A (en) | Laser welding equipment based on gradient energy band splicing | |
US11999106B2 (en) | Cooler for optics transmitting high intensity light | |
US11679549B2 (en) | Additive manufacturing apparatus with controller varying the beam shift of a laser based on slice model parameters of build object | |
CN215589948U (en) | Three-dimensional printing equipment | |
US20240042691A1 (en) | Additive manufacturing using light steering and/or dynamic beam shaping |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |