CN1900871A - Control system for light hardening quick forming resin level - Google Patents
Control system for light hardening quick forming resin level Download PDFInfo
- Publication number
- CN1900871A CN1900871A CN 200610043045 CN200610043045A CN1900871A CN 1900871 A CN1900871 A CN 1900871A CN 200610043045 CN200610043045 CN 200610043045 CN 200610043045 A CN200610043045 A CN 200610043045A CN 1900871 A CN1900871 A CN 1900871A
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- resin
- liquid level
- sinker
- compensation mechanism
- groove
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- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The control system includes following parts and structure: a molding resin storage tank for loading photosensitive resin, and worktable capable of moving work piece up and down setup inside the resin storage; accessorial storage for supplying resin setup on the resin storage; reflecting type laser position sensor in use for detecting position of liquid level setup above liquid level of resin; being connected to computer, the sensor sends signal received from position of liquid level to computer. Through control card, the computer is connected to drive, and motor. Compensation mechanism of sinking block is connected to the output end of motor. Sinking block is connected to compensation mechanism of sinking block. Through drive, control card, motor receives control signal sent from computer and realizes rotation. Compensation mechanism of sinking block drives sinking block up down to adjust liquid level in the resin storage to keep stable liquid level.
Description
Technical field
The invention belongs to the rapid shaping technique field, particularly a kind of resin level control system that is used for photocurable quick shaping process.
Background technology
Photocureable rapid shaping is raw material with the photosensitive resin, and the track while scan by the computer control Ultra-Violet Laser makes hardening of resin and moulding.At first in groove, fill with liquid photosensitive resin, the UV laser beam that laser instrument sends branch layer cross section information by part under the control of deflection system is carried out point by point scanning on the photosensitive resin surface, the thin resin layer that is scanned the zone solidify to form a thin layer of part because of by UV-irradiation photopolymerization reaction being taken place.After this, worktable moves down a thickness of thin layer, so that the resin surface that solidified in last time applies the new liquid resin of one deck, by scanning processing to following one deck, on one deck, so repeat to finish before new one deck that solidifies will be bonded in, obtain the 3D solid prototype until the part manufacturing.
Guaranteeing accurate bed thickness, is the key that guarantees rapid shaping product Z directional precision.At present, one of gordian technique of taking-vacuum suction is wipeed system off, and it mainly acts on and is to guarantee the smooth of liquid level, and will really guarantee accurate bed thickness, just must guarantee the constant of liquid level position.Simultaneously, keeping the constant distance of liquid level and scanner center, promptly keep the constant of liquid level position, is again the key that guarantees X, Y directional precision.Before not adopting laser liquid-level detection, sinker compensation, liquid level is mainly kept constant by resin overflow mode.Whole device comprises a resin make-up pump, and the swiveling wheel on the resin make-up pump will be assisted in the groove resin and be brought the moulding resin groove into, and resin unnecessary in the moulding resin groove flows to auxilliary groove by the overflow limit.But the interior resin flow of groove causes workpiece to tilt to a direction in the forming process, and the variation of excess flow makes above-mentioned inclination be uncertain, influences quantity of sintered parts.Also exist the additional speed of resin slower in addition, there are phenomenons such as fluctuation in the resin liquid level.
In sum, keep that photocureable rapid shaping machine resin liquid level is highly stable to guarantee product Z directional precision for guaranteeing that bed thickness is even, X, Y scanning direction precision are significant.
Summary of the invention
Defective and deficiency in view of above-mentioned prior art existence, the objective of the invention is to, a kind of resin level control system that is used for photocureable rapid shaping is provided, this system adopts the reflective laser position transducer that the liquid level position of rapid molding device is detected, by the lifting of computer-controlled driven by motor sinker in the auxilliary groove of resin, keep the liquid level of moulding resin storage tank constant.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind of resin level control system that is used for photocurable quick shaping process is characterized in that this system comprises the moulding resin groove of a splendid attire photosensitive resin, is provided with in the moulding resin groove to drive the worktable that workpiece moves up and down; The moulding resin groove is provided with the auxilliary groove that replenishes resin; Above the resin liquid level, also be provided with a reflective laser position transducer that is used to detect liquid level position; This reflective laser position transducer links to each other with computing machine, and the liquid level position signal that receives is sent in the computing machine; Computing machine is connected with driver and motor by control card, the output terminal of motor is connected with the sinker compensation mechanism, the sinker compensation mechanism is connected with sinker, the control signal that motor is sent by driver, control card receiving computer realizes rotating, drive sinker by sinker compensation mechanism bearing seat and in auxilliary groove, move up and down, resin liquid level in the moulding resin groove is regulated.
The resin level control system of photocurable quick shaping process of the present invention has adopted high-precision reflective laser position transducer, can accurately measure liquid level position, adopt sinker formula compensation mechanism, simply, accurately, reliably, total system adopts closed-loop control, the control accuracy height, and can realize that computer program controls automatically, be fit to very much the growth requirement of make-up machine robotization.Overcome conventional liquid level fully and stablized the defectives such as workpiece inclination that hold mode produces, energy better controlled liquid level stabilizing shortens the liquid level stabilizing time, and the precision of shaping workpiece and speed are improved.
Description of drawings
Fig. 1 is the schematic diagram of whole tank level control system.
The present invention is described in further detail below in conjunction with accompanying drawing and know-why of the present invention.
Embodiment
Referring to Fig. 1, the resin level control system that is used for photocurable quick shaping process of the present invention comprises the moulding resin groove 1 of a splendid attire photosensitive resin, is provided with in the moulding resin groove 1 and drives the worktable 2 that workpiece 3 moves up and down; Moulding resin groove 1 is provided with the auxilliary groove 14 that replenishes resin; Above resin liquid level 4, also be provided with a reflective laser position transducer 5 that is used to detect liquid level position; This reflective laser position transducer 5 links to each other with computing machine 6, and the liquid level position signal that receives is sent in the computing machine; Computing machine 6 is connected with driver 8 and motor 9 by control card 7, the output terminal of motor 9 is connected with the sinker compensation mechanism, the sinker compensation mechanism is connected with sinker 13, the control signal that motor 9 is sent by driver 8, control card 7 receiving computers 6 realizes rotating, and drives sinker 13 by the sinker compensation mechanism and moves up and down in auxilliary groove 14.Resin liquid level 4 in the moulding resin groove 1 is regulated.
Moulding resin groove 1 is used for forming part, and auxilliary groove 14 is used for Liquid level compensator.
Worktable 2 drives workpiece 3 and moves up and down.Whenever finish bed thickness of one deck decline in the work, after workpiece completes, workpiece 3 is risen from liquid levels.
Resin liquid level 4 promptly finally needs the destination object of control, will guarantee its position stability exactly.
Reflective laser position transducer 5 is the vitals of system, is used for detecting in real time the position of liquid level 4.
Computing machine 6 is used to handle the position signalling that reflective laser position transducer 5 detects, and writes steering order to motion control card 7.
Motion control card 7 sends motion control signal to servo-driver 8.
Servomotor 9 is accepted the pulse signal of driver 8, realizes accurately rotating.
The sinker compensation mechanism comprises bearing seat 10, leading screw 11 and support 12.The upper and lower translation motion that they are converted into sinker 13 with rotatablely moving of motor 9 main shafts.
Reflective laser position transducer 5 is semiconductor luminous point position sensor PSD (number of patent applications: 200510096499.1) be used to detect liquid level and change.Its principle is to launch a branch of light to liquid level at a certain angle by laser diode, produces reflection on liquid level, places a photo-sensitive cell and be used for receiving beam on catoptrical circuit.When liquid level changed, the reflection spot of light beam on liquid level changed, reflected light path generation translation, thus the luminous point that reflexes on the photo-sensitive cell also is offset certain distance, and be linear relationship between the changing value of luminous point translation distance and liquid level.The spot displacement signal that the effect of photo-sensitive cell will be reacted the liquid level height change exactly is converted into electric signal, and is input in the subsequent conditioning circuit and handles.Finally calculate the variable quantity of liquid level, it is presented on the computer screen in conjunction with the program of developing.
The sinker compensation mechanism is used to compensate the variation of resin liquid level, sinker part volume is immersed in the resin all the time in the course of the work, its compensation principle is for when sinker descends in auxilliary groove, the moulding resin tank liquor face that is communicated with auxilliary groove will be lifted certain altitude, when sinker rises, moulding resin tank liquor face will descend under action of gravity, thereby realize the adjusting to liquid level.
Suppose A
1The sectional area of expression resin storage tank, A
2The sectional area of expression sinker, H
1Be the changing value of resin liquid level, H
2Be the displacement of sinker, and regulation H
1And H
2Positive dirction be vertically upward.Then their relation can be expressed as following formula:
Negative sign is wherein represented H
1With H
2Direction of motion just opposite.Promptly work as H
2For on the occasion of, when sinker moves upward, H
1Be negative value, liquid level descends; Work as H
2Be negative value, when sinker moves downward, H
1For rising on the occasion of, liquid level.Moving up and down of sinker is to work under the driving of high-precision servo motor and ball-screw in addition, therefore can realize minute adjustment.
The liquid level compensation principle that the present invention adopts is, when fluctuation appears in liquid level, measured the deviation of distance and gauged distance between present liquid level and the sensor by laser position sensors.When being overgauge, and current measuring distance overgauge distance, the expression liquid level is too low, and then sensor is passed to computing machine with this deviation signal, and sends instruction control sinker decline certain distance by computing machine and make liquid level get back to normal place.When being minus deviation, just opposite, the expression liquid level is too high, and the computer control sinker rises, and liquid level will drop to normal place, thereby realizes the real-time control to liquid level.
In the photocuring moulding machine course of work, constantly be accompanied by resin and be transformed into solid-state process by liquid state, because solid resin is bigger slightly than liquid resinous density, so whenever finish one deck, the resin volume in the resin storage tank will reduce, and liquid level will descend.When especially making the bigger one deck of sectional area, liquid level descends apparent in viewly, all must compensate adjustment to liquid level after therefore whenever finishing one deck.In addition, after part completed the emersion liquid level, liquid level was with the very big height of very fast decline, before making next part, bucking-out system must compensate to liquid level normal place and could begin to make, if the resin deficiency also must be added resin in addition in resin storage tank.Therefore collocation structure is wanted to realize two kinds of functions: one, the automatic liquid level adjustment of interlayer; Two, the operation of the interpolation resin after completing.
Workpiece 3 is in manufacturing process, whenever finish one deck scanning, the distance of a bed thickness of worktable 2 declines, at this moment sensor 5 just carries out the measurement of continuous several times to the position of liquid level 4, get their actual range of mean value H conduct between front sensor and liquid level, and this distance signal is inputed to computing machine 6.In computing machine 6, there is the gauged distance H between sensor and the liquid level
0, computing machine 6 is with H and H
0Compare, if H＞H
0Illustrate that liquid level is on the low side, computing machine 6 sends control signal to motion control card 7 and driver 8, rotates the angle of determining by motor 9 main shafts, the distance that makes sinker 13 descend and determine, and liquid level will be got back to normal place.If H＜H
0Illustrate that liquid level is higher, motor 9 drives the distance that sinker 13 rises and determines, liquid level just drops to normal place.
After workpiece completed the emersion liquid level, if the workpiece volume is less, liquid level descended little, and sinker decline certain altitude can compensate to normal place with liquid level.Bigger as if the workpiece volume, liquid level decline is a lot, and at this moment system can point out and need operate by the interpolation resin before making next part.Resin add good after, but the automatic compensation function of open system just continues to do next part.
Claims (3)
1. a resin level control system that is used for photocurable quick shaping process is characterized in that, this system comprises the moulding resin groove (1) of a splendid attire photosensitive resin, is provided with in the moulding resin groove (1) to drive the worktable (2) that workpiece (3) moves up and down; Moulding resin groove (1) is provided with the auxilliary groove (14) that replenishes resin; Also be provided with a reflective laser position transducer (5) that is used to detect liquid level position in resin liquid level (4) top; This reflective laser position transducer (5) links to each other with computing machine (6), and the liquid level position signal that receives is sent in the computing machine; Computing machine (6) is connected with driver (8) and motor (9) by control card (7), the output terminal of motor (9) is connected with the sinker compensation mechanism, the sinker compensation mechanism is connected with sinker (13), the control signal that motor (9) is sent by driver (8), control card (7) receiving computer (6) realizes rotating, drive sinker (13) by the sinker compensation mechanism and in auxilliary groove (14), move up and down, resin liquid level (4) in the moulding resin groove (1) is regulated.
2. the system as claimed in claim 1 is characterized in that, described sinker compensation mechanism comprises bearing seat (10), is connected with leading screw (11) on the bearing seat (10), and support (12) is arranged on the leading screw (11).
3. the system as claimed in claim 1 is characterized in that, described reflective laser position transducer (5) is semiconductor luminous point position sensor PSD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610043045 CN1900871A (en) | 2006-06-28 | 2006-06-28 | Control system for light hardening quick forming resin level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610043045 CN1900871A (en) | 2006-06-28 | 2006-06-28 | Control system for light hardening quick forming resin level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1900871A true CN1900871A (en) | 2007-01-24 |
Family
ID=37656767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610043045 Pending CN1900871A (en) | 2006-06-28 | 2006-06-28 | Control system for light hardening quick forming resin level |
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|---|---|
| CN (1) | CN1900871A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997850A (en) * | 2012-11-28 | 2013-03-27 | 苏州博德自动化科技有限公司 | Rotor introduction height detection device for motor magnetic steel automatic magnetizing machine |
| CN104210102A (en) * | 2014-07-29 | 2014-12-17 | 苏州江南嘉捷机电技术研究院有限公司 | Inclinable type resin tank mechanism of beam restraining type stereo lithography apparatus equipment |
| CN104615151A (en) * | 2014-12-26 | 2015-05-13 | 合肥中辰轻工机械有限公司 | Control lifting device with position sensor |
| CN105269821A (en) * | 2015-12-02 | 2016-01-27 | 珠海天威飞马打印耗材有限公司 | Dlp three-dimensional printer and printing method thereof |
| CN106363920A (en) * | 2016-09-24 | 2017-02-01 | 上海大学 | High-efficiency high-mechanical-property 3D printing device and method based on fused deposition |
| CN111546632A (en) * | 2020-07-02 | 2020-08-18 | 深圳市深华科科技有限公司 | Digital light processing 3D printer |
| CN112497754A (en) * | 2020-11-25 | 2021-03-16 | 上海联泰科技股份有限公司 | Liquid level adjusting method and system, 3D printing method and device and storage medium |
-
2006
- 2006-06-28 CN CN 200610043045 patent/CN1900871A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997850A (en) * | 2012-11-28 | 2013-03-27 | 苏州博德自动化科技有限公司 | Rotor introduction height detection device for motor magnetic steel automatic magnetizing machine |
| CN104210102A (en) * | 2014-07-29 | 2014-12-17 | 苏州江南嘉捷机电技术研究院有限公司 | Inclinable type resin tank mechanism of beam restraining type stereo lithography apparatus equipment |
| CN104615151A (en) * | 2014-12-26 | 2015-05-13 | 合肥中辰轻工机械有限公司 | Control lifting device with position sensor |
| CN105269821A (en) * | 2015-12-02 | 2016-01-27 | 珠海天威飞马打印耗材有限公司 | Dlp three-dimensional printer and printing method thereof |
| CN105269821B (en) * | 2015-12-02 | 2019-05-21 | 珠海天威飞马打印耗材有限公司 | DLP three-dimensional printer and its Method of printing |
| CN106363920A (en) * | 2016-09-24 | 2017-02-01 | 上海大学 | High-efficiency high-mechanical-property 3D printing device and method based on fused deposition |
| CN111546632A (en) * | 2020-07-02 | 2020-08-18 | 深圳市深华科科技有限公司 | Digital light processing 3D printer |
| CN112497754A (en) * | 2020-11-25 | 2021-03-16 | 上海联泰科技股份有限公司 | Liquid level adjusting method and system, 3D printing method and device and storage medium |
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