CN109795105A - 3 D-printing device and Method of printing - Google Patents
3 D-printing device and Method of printing Download PDFInfo
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- CN109795105A CN109795105A CN201910146728.8A CN201910146728A CN109795105A CN 109795105 A CN109795105 A CN 109795105A CN 201910146728 A CN201910146728 A CN 201910146728A CN 109795105 A CN109795105 A CN 109795105A
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- lifting assembly
- storage tank
- light source
- control system
- printing
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Abstract
The invention belongs to three-dimensional printer technology field, a kind of 3 D-printing device and Method of printing are disclosed.Wherein, the 3 D-printing device includes fixed frame, the light source being set on fixed frame, the first lifting assembly, the second lifting assembly, focusing component, the resin storage tank being set on the first lifting assembly, the print platform being set on the second lifting assembly, the ranging mechanism being set on focusing component, and the control system being electrically connected respectively with light source, focusing component, the first lifting assembly, the second lifting assembly.In this way, focusing precision greatly improved so that the auto-focusing in print procedure can be realized in the mutual cooperation by control system, ranging mechanism, the first lifting assembly, the second lifting assembly, the printout of 10 microns or less accuracy requirements may be implemented.
Description
Technical field
The invention belongs to three-dimensional printer technology fields, are to be related to a kind of 3 D-printing device and printing more specifically
Method.
Background technique
Three-dimensional printer is a kind of cumulative manufacturing technology, i.e. a kind of machine of increasing material manufacturing rapid shaping technique, it be with
Based on digital model file, with special adhesion material, three-dimensional object is manufactured by printing from level to level.At this stage three
Dimension printer is used to manufacture various complex parts, product, mold etc..
Currently, existing three-dimensional printer is usually SLA (Stereo Lithography Apparatus；Photosensitive resin
Selectivity solidification) three-dimensional printer, the precision of the three-dimensional printer is difficult to reach 50 microns hereinafter, and needing in print procedure
Manual focus is carried out to print system, manual focus error is larger, influences to project out of focus, and being unable to satisfy 50 microns or less precision needs
The printout wanted.
Summary of the invention
The purpose of the present invention is to provide a kind of 3 D-printing devices, it is intended to solve existing printing equipment and be unable to satisfy essence
The technical issues of spending higher printout.
To achieve the goals above, the technical solution adopted by the present invention is that: 3 D-printing device, comprising:
Fixed frame；
Light source is set on the fixed frame；
Resin storage tank, for containing molding photosensitive resin to be printed；
First lifting assembly, sliding are erected on the fixed frame, for carrying and driving the resin storage tank to go up and down；
Focusing component is set on the fixed frame, for guiding the light source projects in the resin storage tank with by institute
It states photosensitive resin and carries out curing process；
Print platform, activity are protruded into the resin storage tank, for being bonded with the photosensitive resin after solidifying；
Second lifting assembly, sliding are erected on the fixed frame, for carry and drive print platform lifting with
Realize the continuous printing of entity component；
Control system is electrically connected at the light source, the focusing component, first lifting assembly and described
Two lifting assemblies；
Ranging mechanism is set on the focusing component, for photosensitive resin liquid level and the printing described in real-time monitoring
The information of monitoring is simultaneously fed back to the control system by the horizontal position of platform.
Further, the 3 D-printing device further includes for the liquid level of the molding photosensitive resin to be printed is fast
The flat Beng Mo mechanism of ram compression, the Beng Mo mechanism are set in the resin storage tank, and the Beng Mo mechanism and the control system
It is electrically connected.
Further, the focusing component includes that one end has the hollow shell of opening, is set on the fixed frame and is used in combination
In the supporting table for supporting the hollow shell, it is built in the light splitting of the optical path stroke in the hollow shell and for changing the light source
Mirror and for receive by the spectroscope processing the light source and by the light source projects in the resin storage tank
Projection lens, the projection lens are set at the aperture position of the hollow shell, and the ranging mechanism is set to the branch
It supports on platform.
Further, the focusing component further includes focusing on the photosensitive resin for adopting the bat projection lens
The camera of projected image, the camera are built in the hollow shell, and the camera and the control system are electrically connected.
Further, the 3 D-printing device further includes being used to support first lifting assembly and second lifting
The support plate of component and the driving mechanism for being set to the bottom end of the support plate and being used to that the support plate to be driven to slide.
Further, the driving mechanism includes the first sliding block for being used to support the support plate, for pushing described
The first pushing component that one sliding block is moved along the support plate length direction is used to support the second sliding of first pushing component
Block and the second pushing component for pushing second sliding block to move along the support plate width direction, described first
Sliding block is installed on the support plate back to the side of first lifting assembly, and second sliding block is installed on described first and pushes
Component is back to the side of first sliding block.
Method of printing is included the following steps: using 3 D-printing device as described above
S01, the plane coordinates of ranging mechanism acquisition print platform and the plane coordinates of photosensitive resin liquid level are utilized；
S02, the information that the ranging mechanism monitors is fed back into control system, passes through the control system and controls the simultaneously
One lifting assembly drives the resin storage tank lifting and the second lifting assembly to drive print platform lifting, so that the printing is flat
The forming surface of platform and the liquid level of the photosensitive resin in the resin storage tank are flush；
S03, light source is opened, guides the light source projects in the resin storage tank with by the photosensitive tree by focusing component
Rouge is solidified, and the continuous printing of the print platform lifting completion entity component is driven by the second lifting assembly.
Further, further include following steps after the step S01:
Beng Mo mechanism is installed on the resin storage tank；
The plane coordinates that the film surface of the Beng Mo mechanism is acquired by the ranging mechanism, the ranging mechanism is monitored
Information feeds back to control system, pass through the control system control simultaneously the first lifting assembly drive resin storage tank lifting, with
And second lifting assembly drive print platform lifting so that the forming surface of the film surface of the Beng Mo mechanism, the print platform, with
And the liquid level of the photosensitive resin is parallel to each other.
Further, it further includes following steps between the resin storage tank that the focusing component, which guides the light source projects:
Step a: calibration picture is chosen as reference, projected image is indexed using step size doubles method, is retrieved using camera
Adopt take photo similar with calibration picture；
Step b: the photo of acquisition is filtered noise reduction process using camera；
Step c: the luminance factor of camera photo collected is calculated；
Step d: calculating camera photo collected and calibrates the coefficient of similarity of picture；
Step e: the energy value of the photo of acquisition described in camera is calculated.
Further, the step c specifically comprises the following steps:
It uses the 1/2 of projection lens depth of focus for initial step length, starts to move；
Every movement is primary, captures photo in time by camera, and calculate the luminance factor of the photo of capture.
The beneficial effect of 3 D-printing device provided by the invention is: compared with prior art, three-dimensional of the invention is beaten
Printing equipment is set by the way that ranging mechanism is arranged, can the levelness of photosensitive resin liquid level in real-time monitoring resin storage tank and the position of print platform
It sets, and the information of monitoring is fed back into control system, after control system receives information feedback, while controlling the first lifting assembly
It is gone up and down with the second lifting assembly, so that the liquid level of the photosensitive resin in the forming surface of the print platform and the resin storage tank
It is flush, then turns on light source, guide the light source projects in the resin storage tank with by the photosensitive tree by focusing component
Rouge is solidified, and the continuous printing of the print platform lifting completion entity component is driven by the second lifting assembly, at this
In embodiment, by the mutual cooperation of control system, ranging mechanism, the first lifting assembly, the second lifting assembly, to can realize
Focusing precision greatly improved in auto-focusing in print procedure, and the printout of 10 microns or less accuracy requirements may be implemented.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In required practical attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the one of the present embodiment
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the schematic perspective view for the 3 D-printing device that the embodiment of the present invention proposes；
Fig. 2 is the sectional perspective schematic diagram of 3 D-printing device in Fig. 1 of proposition of the embodiment of the present invention；
Fig. 3 is the structural schematic diagram for the 3 D-printing device that the embodiment of the present invention proposes；
Fig. 4 is the flow chart for the Method of printing that the embodiment of the present invention proposes；
Fig. 5 is the step size doubles indexing means schematic diagram that the embodiment of the present invention proposes；
Fig. 6 is the pendulum model moving index method schematic diagram that the embodiment of the present invention proposes；
Fig. 7 is that the multiple spot that the embodiment of the present invention proposes compares climbing focus method schematic diagram.
Wherein, each appended drawing reference in figure:
1- fixed frame；11- resin storage tank；
2- light source；
The first lifting assembly of 3-；The first support shaft of 31-；32- mounting plate；
4- focusing component；41- hollow shell；42- supporting table；43- projection lens；44- camera；45- spectroscope；
5- print platform；
The second lifting assembly of 6-；The second support shaft of 61-；62- slide plate；
7- ranging mechanism；
8- Beng Mo mechanism；
9- support plate；
10- driving mechanism；The first sliding block of 101-；The first pushing component of 102-；The second sliding block of 103-；104- the second promotion group
Part.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or it may be simultaneously present centering elements.When an element is known as " being connected to " another element, it can be with
It is directly to another element or may be simultaneously present centering elements.
It is only phase each other in addition, it should also be noted that, positional terms such as left and right, upper and lower in the embodiment of the present invention
It is reference to concept or with the normal operating condition of product, and should not be regarded as restrictive below in conjunction with specific
Realization of the invention is described in detail in embodiment.
As shown in Figures 1 to 3, the present embodiment proposes a kind of 3 D-printing device, please refers to Fig. 1 and Fig. 3, the printing equipment
Including fixed frame 1, light source 2 is equipped on fixed frame 1, which can provide ultraviolet light, which further includes resin storage tank
11, the first lifting assembly 3, focusing component 4, the second lifting assembly 6, print platform 5, control system (attached drawing is not made) and
Ranging mechanism 7, the resin storage tank 11 can be used for carrying molding photosensitive resin to be printed, which is set to fixed frame 1
On, and guide light source 2 to be projeced into resin storage tank 11 so that photosensitive resin is carried out curing process, the first lifting by focusing component 4
What component 3, the second lifting assembly 6 slided is erected on fixed frame 1, and the first lifting assembly 3 can be used for carrying and driving tree
Rouge slot 11 is gone up and down, which protrudes into above-mentioned resin storage tank 11, and the second lifting assembly 6, which can be used for carrying and driving, to be beaten
The continuous printing that entity component is realized in the lifting of platform 5 is printed, which is set on focusing component 4, which can
Control system is fed back to for the horizontal position of real-time monitoring photosensitive resin liquid level and print platform 5, and by the information of monitoring, it should
Control system and light source 2, focusing component 4, the first lifting assembly 3, the second lifting assembly 6 are electrically connected.In this way, being surveyed by setting
Spacing mechanism 7, can the levelness of photosensitive resin liquid level in real-time monitoring resin storage tank 11 and the position of print platform 5, and will monitoring
Information feed back to control system, after control system receives information feedback, while controlling the first lifting assembly 3 and being gone up and down with second
Component 6 is gone up and down, so that the forming surface of the print platform 5 and the liquid level of the photosensitive resin in the resin storage tank 11 are mutually neat
It is flat, light source 2 is then turned on, guides the light source 2 to be projeced into the resin storage tank 11 with by the photosensitive tree by focusing component 4
Rouge is solidified, and the continuous printing of the lifting of the print platform 5 completion entity component is driven by the second lifting assembly 6,
In the present embodiment, by the mutual cooperation of control system, ranging mechanism 7, the first lifting assembly 3, the second lifting assembly 6, thus
The auto-focusing in print procedure can be achieved, focusing precision greatly improved, beating for 10 microns or less accuracy requirements may be implemented
Printed document.
In the present invention, ray machine is the main component for influencing light source, and most important component is micro display chip in ray machine,
It can be the digital optical demodulator of reflective liquid crystal screen either Texas Instrument, and reflective liquid crystal screen is considered than traditional transmission liquid
Crystalline substance screen has the brightness and contrast of better image, its each pixel can adjust the polarization of reflected light according to the voltage of application
State；And each pixel is a small reflective mirror in digital optical demodulator, it controls reflected light by deflected micromirror face
Whereabouts, deflectable -10 °~10 ° of each eyeglass in the number optical demodulator.In this way, brighter pixel is exactly that reflected light enters
Camera lens, opposite is exactly dark pixel, i.e., the gray scale of image is controlled by the frequency of eyeglass deflection, and number optical modulator
Chip in device has better ultraviolet light compatibility and higher contrast than liquid crystal chip.Preferably, in the present invention, should
Light source is using digital optical demodulator, and the resolution of the number optical demodulator is 1920 × 1080, each micro mirror chip size
It is 7.6 μm of 7.6 μ m, optical source wavelength is 405 nanometers, and certainly, in the present embodiment, which may be alternatively provided as it
He, does not limit uniquely herein.
Preferably, referring to Fig. 3, the first lifting assembly 3 includes the first support shaft 31 and mounting plate 32, first support shaft
Slideway (attached drawing is not made) is offered on 31, one end of the mounting plate 32 is built in slideway, which is installed on installation
On plate 32, in addition, the first lifting assembly 3 further includes the first actuator (attached drawing is not made), the first actuator can drive installation plate
32 liftings, mounting plate 32 can drive resin storage tank 11 to go up and down.In this way, when needing to adjust the adjustable height of resin storage tank 11, this time control
System processed can control the lifting of the first actuator drive installation plate 32, so that resin storage tank 11 is gone up and down to proper height.Preferably, on
Stating the first actuator is preferably push-rod electric machine or lead screw motor, certainly in this embodiment, according to the actual situation and specific requirements, should
First actuator can also be other motors, not limit uniquely herein.
Preferably, it referring to Fig. 3, the second lifting assembly 6 further includes the second support shaft 61, is equipped in the second support shaft 61
Slide plate 62 and the second actuator (attached drawing is not made), the print platform 5 are mounted on slide plate 62, and the second actuator can drive slide plate
62 liftings, slide plate 62 can drive print platform 5 to go up and down.In this way, when needing to adjust the adjustable height of print platform 5, this time control
System processed can control the second actuator driving slide plate 62 to go up and down, so that print platform 5 is gone up and down to proper height.Preferably, on
Stating the second actuator can be push-rod electric machine, and certainly, which can also be other motors etc., not limit uniquely herein
It is fixed.
Preferably, above-mentioned light source 2 uses DLP (Digital Light Processing, digital light processing) light source, passes through
Using DLP light source, so that the precision of product may make to further increase, certainly, in the present embodiment, according to the actual situation and have
Body demand, above-mentioned light source 2 also may be selected other light sources, do not do unique restriction herein.
Further, Fig. 2 and Fig. 3 are please referred to, a kind of specific embodiment party as 3 D-printing device provided by the invention
Formula, the 3 D-printing device further include Beng Mo mechanism 8, which is set in resin storage tank 11, and Beng Mo mechanism 8 and control
System processed is electrically connected.In this way, by setting Beng Mo mechanism 8, so as to pass through Beng Mo mechanism 8 for molding photosensitive tree to be printed
The liquid level of rouge quickly flattens, and shortens the time of photosensitive resin levelling, improves the efficiency of formed product.
Preferably, above-mentioned molding photosensitive resin to be printed is the resin of print platform upper end in resin storage tank, i.e., in this reality
Shi Zhong, the upper end of the print platform are the X-direction in Fig. 1.In this way, when print platform drives cured molding resin towards remote
When from X-direction movement, which can carry out compressing levelling for the resin of print platform upper end, substantially shorten liquid level levelling
Time improves shaping efficiency.
In the present embodiment, the working principle of printing equipment is as follows:
Firstly, monitoring the level of the photosensitive resin liquid level and print platform 5 in resin storage tank 11 by setting ranging mechanism 7
Position, and the information of monitoring is fed back into control system, after control system receives information feedback, while controlling the first lifting group
Part 3 and the second lifting assembly 6 are gone up and down, so that the photosensitive tree in the forming surface of the print platform 5 and the resin storage tank 11
The liquid level of rouge is flush, and then turns on light source 2, guides light source 2 to be projeced into the resin storage tank 11 with by institute by focusing component 4
It states photosensitive resin to be solidified, subsequent print platform 5 is bonded with the photosensitive resin after solidifying, and passes through the second lifting assembly 6
Print platform 5 is driven to decline, print platform 5 drives the decline of the photosensitive resin after solidifying, and the subsequent meeting of Beng Mo mechanism 7 will be subsequent
The liquid level of photosensitive resin to be printed quickly flattens, and is carried out at solidification by focusing component 4 to the photosensitive resin in resin storage tank 11
Reason realizes the curing molding layer by layer of photosensitive resin, and realizes the continuous printing to entity component by print platform.
Further, Fig. 2 and Fig. 3 are please referred to, a kind of specific embodiment party as 3 D-printing device provided by the invention
Formula, above-mentioned focusing component 4 include hollow shell 41 and supporting table 42, which has opening (attached drawing is not made), should
Supporting table 42 is set on fixed frame 1 and is used to support hollow shell 41, and spectroscope 45 and projecting mirror are built-in in hollow shell 41
First 43, which is set at the aperture position of hollow shell 41, and above-mentioned ranging mechanism 7 is set in supporting table 42.
In this way, the spectroscope 45 can change the optical path stroke of light source 2 by setting spectroscope 45, it, should by the way that projection lens 43 are arranged
Projection lens 43 can be used for receiving the light source handled by spectroscope 45, and the light source 2 is projeced into resin storage tank 11, will set
Photosensitive resin in rouge slot 11 carries out curing process.Preferably, the inclination of above-mentioned spectroscope 45 and 41 length direction of hollow shell is pressed from both sides
Angle is 45 °, in this way, it is ensured that light source 2 can be radiated on photosensitive resin completely, be mentioned for the curing process of subsequent photosensitive resin
It has supplied to guarantee.
In the present embodiment, it please refers to shown in Fig. 1, the X-direction in Fig. 1 represents the length direction of hollow shell 41.
Further, Fig. 2 and Fig. 3 are please referred to, a kind of specific embodiment party as 3 D-printing device provided by the invention
Formula, the focusing component 4 further include camera 44, which is built in hollow shell 41, and the camera 44 and control system electricity
Property connection.In this way, being focused on photosensitive resin by being equipped with camera 44 in hollow shell 41 so as to adopt bat projection lens 43
Projected image, and projection image information is fed back into control system, control system is burnt to the camera lens for controlling projection lens 43
It is deep, complete auto-focusing process.
It further, should referring to Fig. 3, a kind of specific embodiment as 3 D-printing device provided by the invention
3 D-printing device further includes support plate 9, which can be used for supporting the first lifting assembly 3 and the second lifting assembly 6, this
Outside, which further includes driving mechanism 10, which is set to the bottom end of support plate 9, the driving mechanism
10 can be used for that support plate 9 is driven to slide.In this way, the driving mechanism 10 can drive support plate 9 to slide, support plate 9 and then the is driven
One lifting assembly 3 and the sliding of the second lifting assembly 6, provide guarantee for the printing of subsequent different location.
Preferably, in the present embodiment, Fig. 2 and Fig. 3 are please referred to, above-mentioned driving mechanism 10 includes the first sliding block 101 and the
One pushing component 102, the first sliding block 101 are installed on support plate 9 back to the side of the first lifting assembly 3, and the first sliding block 101 can prop up
Above-mentioned support plate 9 is supportted, the first pushing component 102 can push the first sliding block 101 to move along the length direction of support plate 9, in addition,
Above-mentioned driving mechanism 10 further includes the second sliding block 103 and the second pushing component 104, and the second sliding block 103 is set to the first promotion group
On part 102 and back in the side of the first sliding block 101, the second pushing component 104 can push the second sliding block 103 along support plate 9
Width direction it is mobile, realize that driving mechanism 10 drives the first lifting assembly 3 and the second lifting assembly 6 can be along support plate 9
Length direction and width direction are mobile, provide guarantee for the printing of subsequent different location.
In the present invention, the printout of 10 microns or less accuracy requirements can be realized by the device, in the present embodiment,
Projection lens can be adjusted on the basis of the device, allow the device to meet 10 microns to 20 microns of precision
Demand, certainly, according to the actual situation and specific requirements, by being adjusted to projection lens, can also realize 20 microns to 50 it is micro-
The accuracy requirement of rice, does not limit uniquely herein.
In the present invention, a kind of Method of printing is additionally provided, which has using there is above-mentioned 3 D-printing device
Body, which includes the following steps:
The plane coordinates of S01, the plane coordinates that print platform 5 is acquired using ranging mechanism 7 and photosensitive resin liquid level；
S02, the information that the ranging mechanism 7 monitors is fed back into control system, is controlled simultaneously by the control system
First lifting assembly 3 drives the lifting of resin storage tank 11 and the second lifting assembly 6 that print platform 5 is driven to go up and down, so that described
The forming surface of print platform 5 and the liquid level of the photosensitive resin in the resin storage tank 11 are flush；
S03, light source 2 is opened, guides the light source 2 to be projeced into the resin storage tank 11 with will be described by focusing component 4
Photosensitive resin is solidified, and drives the lifting of print platform 5 to complete continuously beating for entity component by the second lifting assembly 6
Print.
In this way, monitoring the levelness and print platform of the photosensitive resin liquid level in resin storage tank 11 by setting ranging mechanism 7
5 position, and the information of monitoring is fed back into control system, after control system receives information feedback, while controlling first liter
Come down to a lower group part 3 and the second lifting assembly 6 is gone up and down, so that the light in the forming surface of the print platform 5 and the resin storage tank 11
The liquid level of quick resin is flush, and then turns on light source, guides the light source 2 to be projeced into the resin storage tank 11 by focusing component 4
In the photosensitive resin to be solidified, and drive the print platform 5 lifting to complete entity zero by the second lifting assembly 6
The continuous printing of part passes through control system, ranging mechanism 7, the first lifting assembly 3, the second lifting assembly 6 in the present embodiment
Mutual cooperation focusing precision greatly improved so that the auto-focusing in print procedure can be realized, may be implemented 10 microns with
The printout of lower accuracy requirement.
Specifically, above-mentioned ranging mechanism 7 passes through the coordinate of the plane corner location of acquisition 5 forming surface of print platform, and
The coordinate of the plane corner location of photosensitive resin liquid level, and the information of monitoring is fed back into control system, pass through control system control
The first lifting assembly 3 and the second lifting assembly 6 are made, so that the forming surface of print platform 5 and the liquid level of photosensitive resin are flush,
Certainly, above-mentioned ranging mechanism 7 can also be by measurement 5 forming surface of print platform, the other positions of photosensitive resin liquid level to realize two
The effect that person's liquid level is flush, does not limit uniquely herein.
Preferably, further include following steps after above-mentioned steps S01:
Beng Mo mechanism 8 is installed on the resin storage tank 11；
The plane coordinates that the film surface of the Beng Mo mechanism 8 is acquired by the ranging mechanism 7 supervises the ranging mechanism 7
The information of survey feeds back to control system, controls the first lifting assembly 3 simultaneously by the control system and drives the resin storage tank 11
Lifting and the second lifting assembly 6 drive resin storage tank 11 to go up and down, so that the film surface of the Beng Mo mechanism 8 and the photosensitive tree
The liquid level of rouge is parallel to each other.
Specifically, in the present embodiment, the thickness of the print platform is between the film surface and print platform of Beng Mo mechanism
Distance.
Specifically, above-mentioned ranging mechanism 7 passes through the coordinate of the plane corner location of acquisition 5 forming surface of print platform, photosensitive
Resin liquid level, 8 film surface of Beng Mo mechanism plane corner location coordinate, and the information of monitoring is fed back into control system, passed through
Control system controls the first lifting assembly 3 and the second lifting assembly 6, so that the liquid level of the film surface of Beng Mo mechanism 8, photosensitive resin
It is parallel to each other, certainly, above-mentioned ranging mechanism 7 can also be by measuring 5 forming surface of print platform, photosensitive resin liquid level, Beng Mo mechanism 8
Film surface other positions to realize effect that three is parallel to each other, do not limit uniquely herein.
In the present embodiment, the liquid level of above-mentioned photosensitive resin is located at 8 film surface of Beng Mo mechanism hereinafter, in this way, can be by the film that stretches tight
Mechanism 8 quickly flattens subsequent molding photosensitive resin to be printed, improves the efficiency of subsequent cure reaction.
Preferably, it further includes following steps between the resin storage tank that above-mentioned focusing component, which guides the light source projects:
Step a: calibration picture is chosen as reference, projected image is indexed using step size doubles method, is examined using camera 44
Rope adopts take photo similar with calibration picture；
Step b: the photo of acquisition is filtered noise reduction process using camera 44；
Step c: the luminance factor of the photo collected of camera 44 is calculated；
Step d: calculating the photo collected of camera 44 and calibrates the coefficient of similarity of picture；
Step e: the energy value of the photo of acquisition described in camera 44 is calculated.
Specifically, the pixel alignment photo that the calibration photo in above-mentioned steps a is 100*100, using the side of step size doubles
Method retrieval projected image is adopted by camera 44 and is taken a picture referring particularly to Fig. 5, and the information of photograph is fed back to control system, is controlled
System processed is constantly focused by control projection lens 43 so that camera 44 take it is similar to standard photographs, to be subsequent into one
Step coke is got ready.
Specifically, specifically comprise the following steps: in above-mentioned steps c
The 1/2 of 43 depth of focus of projection lens is used as initial step length, starts to move；
Every movement is primary, is captured in time by camera 44, and calculate the luminance factor for capturing picture.
Specifically, it is used as initial step length using the 1/2 of 43 depth of focus of projection lens, opens up the movement of pendulum clock formula, as shown in figure 3,
Every movement is primary, and camera 44 captures photo in time, and calculates the luminance factor of the photo of capture, in the present embodiment, the brightness
The critical value of coefficient is 0.3, when the luminance factor of the photo of capture is more than or equal to 0.3, enters step in d at this time, works as capture
Photo luminance factor less than 0.3 when, step c is executed always at this time, until the luminance factor of photo captured is more than or equal to
Until 0.3.
Specifically, further include following steps in above-mentioned steps d:
The 1/3 of 43 depth of focus of projection lens is used as initial step length, climbing is executed and focuses indexing model, such as Fig. 6 and Fig. 7 institute
Show, when the B in Fig. 4 is greater than A, continue to be indexed by current index direction, when B is less than or equal to A, then according to current index
Contrary direction is indexed, and in the present embodiment, the critical value of above-mentioned coefficient of similarity is 0.8, works as coefficient of similarity
When greater than 0.8, then step e is carried out, when coefficient of similarity is less than or equal to 0.8, then execute step d always, until camera 44 is adopted
Until the coefficient of similarity of the photo of collection is greater than 0.8.
Specifically, further include following steps in above-mentioned steps e:
1/4 with 43 depth of focus of projection lens is initial step length, executes multiple spot and compares climbing focusing；
When step-length is less than 2 microns, stop index, then current point at this time is focus.
In the present invention, by the way that ranging mechanism 7 is arranged, can photosensitive resin liquid level in real-time monitoring resin storage tank 11 level
The position of degree and print platform 5, and feeds back to control system for the information of monitoring, by control system, the first lifting assembly 3,
Focusing precision greatly improved so that the auto-focusing in print procedure can be realized in the mutual cooperation of second lifting assembly 6, can
To realize the printout of 10 microns or less accuracy requirements.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. 3 D-printing device characterized by comprising
Fixed frame；
Light source is set on the fixed frame；
Resin storage tank, for containing molding photosensitive resin to be printed；
First lifting assembly, sliding are erected on the fixed frame, for carrying and driving the resin storage tank to go up and down；
Focusing component is set on the fixed frame, for guiding the light source projects in the resin storage tank with by the light
Quick resin carries out curing process；
Print platform, activity are protruded into the resin storage tank, for being bonded with the photosensitive resin after solidifying；
Second lifting assembly, sliding are erected on the fixed frame, for carrying and driving the print platform lifting to realize
The continuous printing of entity component；
Control system is electrically connected at the light source, the focusing component, first lifting assembly and second liter described
It comes down to a lower group part；
Ranging mechanism is set on the focusing component, for photosensitive resin liquid level and the print platform described in real-time monitoring
Horizontal position and the information of monitoring is fed back into the control system.
2. 3 D-printing device as described in claim 1, which is characterized in that the 3 D-printing device further includes for will be to
The Beng Mo mechanism that the liquid level of the photosensitive resin of printing shaping quickly flattens, the Beng Mo mechanism are set to the resin storage tank
In, and the Beng Mo mechanism and the control system are electrically connected.
3. 3 D-printing device as claimed in claim 2, which is characterized in that the focusing component includes that one end has opening
Hollow shell, the supporting table for being set on the fixed frame and being used to support the hollow shell, are built in the hollow shell and are used in combination
In the spectroscope for the optical path stroke for changing the light source and for receiving the light source handled by the spectroscope, simultaneously
By the projection lens of the light source projects above the resin storage tank, the projection lens are set to the opening of the hollow shell
At position, the ranging mechanism is set in the supporting table.
4. 3 D-printing device as claimed in claim 3, which is characterized in that the focusing component further includes for adopting described in bat
Projection lens focus on the camera of the projected image on the photosensitive resin, and the camera is built in the hollow shell, and institute
It states camera and the control system is electrically connected.
5. 3 D-printing device as described in claim 1, which is characterized in that the 3 D-printing device further includes being used to support
The support plate of first lifting assembly and second lifting assembly and it is set to the bottom end of the support plate and for band
Move the driving mechanism of the support plate sliding.
6. 3 D-printing device as claimed in claim 5, which is characterized in that the driving mechanism includes being used to support the branch
First sliding block of fagging, is used the first pushing component for pushing first sliding block to move along the support plate length direction
In the second sliding block for supporting first pushing component and for pushing second sliding block along the support board width side
To the second mobile pushing component, first sliding block is installed on the support plate back to the side of first lifting assembly,
Second sliding block is installed on first pushing component back to the side of first sliding block.
7. Method of printing uses 3 D-printing device as claimed in any one of claims 1 to 6, which is characterized in that including as follows
Step:
S01, the plane coordinates of ranging mechanism acquisition print platform and the plane coordinates of photosensitive resin liquid level are utilized；
S02, the information that the ranging mechanism monitors is fed back into control system, controls first liter simultaneously by the control system
Part of coming down to a lower group drives the resin storage tank lifting and the second lifting assembly to drive print platform lifting, so that the print platform
Forming surface and the liquid level of the photosensitive resin in the resin storage tank are flush；
S03, open light source, by focusing component guide the light source projects in the resin storage tank with by the photosensitive resin into
Row solidifies, and the continuous printing of the print platform lifting completion entity component is driven by the second lifting assembly.
8. Method of printing as claimed in claim 7, which is characterized in that further include following steps after the step S01:
Beng Mo mechanism is installed on the resin storage tank；
The plane coordinates of the film surface of the Beng Mo mechanism, the information that the ranging mechanism is monitored are acquired by the ranging mechanism
Control system is fed back to, the first lifting assembly is controlled simultaneously by the control system and drives the resin storage tank lifting, Yi Ji
Two lifting assemblies drive print platform lifting, so that the film surface of the Beng Mo mechanism and the liquid level of the photosensitive resin are mutual
In parallel.
9. Method of printing as claimed in claim 8, which is characterized in that the focusing component guides the light source projects in described
Further include following steps between resin storage tank:
Step a: choosing calibration picture as reference, index projected image using step size doubles method, adopts bat using camera retrieval
Photo similar with calibration picture；
Step b: the photo of acquisition is filtered noise reduction process using camera；
Step c: the luminance factor of camera photo collected is calculated；
Step d: calculating camera photo collected and calibrates the coefficient of similarity of picture；
Step e: the energy value of the photo of acquisition described in camera is calculated.
10. Method of printing as claimed in claim 8, which is characterized in that the step c specifically comprises the following steps:
It uses the 1/2 of projection lens depth of focus for initial step length, starts to move；
Every movement is primary, captures photo in time by camera, and calculate the luminance factor of the photo of capture.
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