A kind of tank level control system based on SLA principle 3D printerTechnical field
The utility model relates to 3D printing device technical field, especially a kind of tank level control system based on SLA principle 3D printer.
Background technology
SLA(Stereo Lithography Apparatus) technology is laser three-dimensional engraving technology, is the crystallization of collection machinery, laser, photochemistry, software, control technology.The principle that solidified by UV-irradiation based on photosensitive resin, computer control laser successively scans and solidifies liquid photosensitive resin, and the curing cross section of every one deck is to be obtained by the three-dimensional CAD model software hierarchy of part, until finally obtain photosensitive resin prototype in kind.
When the 3D of SLA principle printer is in process, the liquid level that ensures liquid photosensitive resin must be at the sustained height of setting, otherwise add trade union's failure, because the solid part machining is removed from liquid resin at every turn, therefore liquid level can reduce, and must add a certain amount of liquid photosensitive resin, while ensureing that photosensitive resin liquid level reaches setting height, just can continue processing, therefore the control of photosensitive resin liquid level becomes extremely important.
At present, in prior art about the settling mode of foregoing problems, mainly mostly be to adopt filling mode to control liquid level, particularly, shown in Fig. 1, generally connect a filler 3 ' by a motor 1 ' by screw pair 2 ', filler 3 ' reaches the liquid resin the inside in resin storage tank 4 ', the real control liquid level that detects while being also separately provided with liquid level sensor 5 ' in system, drive the filler 3 ' being fixedly connected on screw to rise or decline by the rotation of screw mandrel, control the height of photosensitive resin liquid level by controlling the volume accounting of filler 3 ' in liquid resin.
But this kind of tank level control system has mechanism's complexity, the shortcoming that cost is high, and owing to also will installing filler guiding mechanism or guide rail additional, make tank level control system and size thereof become numerous and jumbled, take larger spatial volume; In addition, although the system of this structure just in order to control liquid level, when resin is less to a certain extent time, must must be artificial add liquid photosensitive resin, could continue control liquid level, automaticity is not high.
In addition, in prior art, adopt in addition dynamic balancing mode to control resin level, particularly, shown in Fig. 2, can pass through a screw pump 6 ', liquid resin is taken out continuously in attached groove 7 ' in major trough 8 ', the edge of major trough 8 ' offers an overfall 9 ', in the time that liquid resin unnecessary in major trough 8 ' reaches the height of overfall 9 ' control, just pass back into again in attached groove 7 ', liquid resin so continuously circulates to reach a balance successively, and liquid level also just remains on specific height.
But in this kind of tank level control system, the flow of controlling the screw pump 5 ' of liquid level can not be too large, therefore causes controlling liquid level efficiency low.If environment temperature has difference, the viscosity of resin is also different, and the liquid level while reaching dynamic balancing is also different, and therefore this control liquid level mode control accuracy is not high.Meanwhile, after machining, must manually add liquid resin, automaticity is more not low at every turn at every turn.
Sign in this, how to research and develop a kind of mechanism simple, and realize high, the supermatic tank level control system based on SLA principle 3D printer of control accuracy, be worth our to explore.
Utility model content
The purpose of this utility model is to provide a kind of tank level control system based on SLA principle 3D printer, to solve tank level control system of the prior art, and the problem such as control accuracy is low, automaticity is low and system is numerous and jumbled.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
Based on a tank level control system for SLA principle 3D printer, for controlling the liquid resinous liquid level of 3D printer resin storage tank, it comprises: laser displacement sensor, detects liquid resin level change displacement in resin storage tank in real time; Original-pack resin barrel, is located near resin storage tank and holds liquid resin to regulate liquid resin amount in resin storage tank; Peristaltic pump, is connected with delivery hose on described peristaltic pump, and peristaltic pump is by delivery hose delivering liquid resin between resin storage tank and original-pack resin barrel; Controller, receives the level change displacement that described laser displacement sensor gathers, and transmits control signal to peristaltic pump delivering liquid resin, to keep in resin storage tank liquid level constant.
Preferably, described original-pack resin barrel has the weight sensor for detecting in real time original-pack resin barrel resin storage.
The weight signal of the weight sensor that preferably, described controller output receives is to display screen, to show resin demand and storage in original-pack resin barrel.
As mentioned above, a kind of tank level control system based on SLA principle 3D printer of the present utility model, accurately measure liquid level variable quantity in resin storage tank by laser sensor, and it is constant with liquid level in maintenance resin storage tank to peristaltic pump delivering liquid resin to be transmitted control signal by main controller, native system is stable, and control accuracy is high, and parts are simple and manufacture easy for installation, saved manually, automaticity is high simultaneously.
Brief description of the drawings
Below in conjunction with drawings and embodiments, the utility model is described in further detail;
Fig. 1 is a kind of tank level control system schematic diagram of inserting filler mode in prior art;
Fig. 2 is the tank level control system schematic diagram of a kind of dynamic balancing control mode in prior art;
Fig. 3 is a kind of tank level control system schematic diagram in the utility model embodiment.
Detailed description of the invention
By specific instantiation, embodiment of the present utility model is described below, those skilled in the art can understand other advantages of the present utility model and effect easily by the disclosed content of this description.The utility model can also be implemented or be applied by other different detailed description of the invention, and the every details in this description also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present utility model.
Shown in Fig. 3, it is a kind of tank level control system schematic diagram based on SLA principle 3D printer in the present embodiment, described tank level control system is used for controlling 3D printer resin storage tank 2 liquid resinous liquid levels, it comprises: laser displacement sensor 1, detects liquid resin level change displacement in resin storage tank 2 in real time; Original-pack resin barrel 3, is located near resin storage tank 2 and holds liquid resin, directly utilizes original-pack resin barrel 3 to regulate liquid resin amount in resin storage tank 2 as the attached groove of resin storage tank 2, has saved the manual operation that needs secondary a dead lift resin by injection; Peristaltic pump 4, is connected with delivery hose 5 on described peristaltic pump 4, and peristaltic pump 4 is for making liquid resin carry between resin storage tank 2 and original-pack resin barrel 3 by delivery hose 5; Controller, receives the level change displacement that described laser displacement sensor 1 gathers, and it is constant with liquid level in maintenance resin storage tank 2 to peristaltic pump 4 delivering liquid resins to transmit control signal.
In such scheme, in tank level control system, parts are simple and manufacture easy for installation, change displacement by laser displacement sensor 1 noncontact, the intelligent online liquid level that detects, there is certainty of measurement high, good stability characteristic, and transmitted control signal and determined the liquid resin of volume to peristaltic pump 4 accurately to carry by main controller, and then it is constant to realize in resin storage tank 2 liquid level.
In another technical scheme, described original-pack resin barrel 3 has the weight sensor 6 for detecting in real time original-pack resin barrel 3 resin storages, the weight signal that can also export the weight sensor 6 receiving by controller is to display screen, to show the interior resin demand of original-pack resin barrel 3 and storage, detect in real time the resin storage in original-pack resin barrel 3 by described weight sensor 6 like this, so that staff changes original-pack resin barrel 3 in time.
A kind of course of work based on SLA principle 3D printer tank level control system of the present utility model is as follows:
First 2 li of resin storage tanks are filled to liquid photosensitive resin, can not exceed the liquid level upper limit, laser displacement sensor 1 is installed in the top of resin liquid level, after original-pack resin barrel 3 is broken a seal. be positioned over the upper surface of weight sensor 6, peristaltic pump 4 is also arranged on to the side of resin storage tank 2, delivery hose 5 is arranged on peristaltic pump 4, by delivery hose 5, the liquid resin in original-pack resin barrel 3 is connected with resin storage tank 2.
In the photocureable rapid shaping process of product, in the time that laser displacement sensor 1 detects that 2 li of resin liquid level height of resin storage tank reduce, controller sends control command and starts working to start peristaltic pump 4,3 li of resins of original-pack resin barrel are flowed to 2 li of resin storage tanks by delivery hose 5, make the resin liquid level of 2 li of resin storage tanks start to raise;
In the time that laser displacement sensor 1 detects resin liquid level height and reaches setting height, peristaltic pump 4 quits work, and the liquid level of 2 li of resin storage tanks is remained unchanged;
In the time that laser displacement sensing 1 device detects that the liquid level of 2 li of resin storage tanks is higher, the motor reversal in peristaltic pump 4 so, flows to 3 li of original-pack resin barrels by the resin of 2 li of resin storage tanks by delivery hose 5, so that the resin liquid level of 2 li of resin storage tanks reduces;
In the time that laser displacement sensor 1 detects resin liquid level height and reaches setting height, peristaltic pump 4 quits work, and the liquid level that resin storage tank is 2 li remains unchanged.
As mentioned above, a kind of tank level control system based on SLA principle 3D printer of the present utility model, accurately measure liquid level variable quantity in resin storage tank 2 by laser sensor 1, and it is constant with liquid level in maintenance resin storage tank 2 to peristaltic pump 4 delivering liquid resins to be transmitted control signal by main controller, can high accuracy carry liquid and there is self-sealing function by peristaltic pump 4, make system control accuracy high, utilize the attached groove of original-pack resin barrel 3 as resin storage tank 2, save artificial, automaticity is high, simultaneously, this liquid level control system parts are simple and manufacture easy for installation.So the utility model has effectively overcome various shortcoming of the prior art and has had high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all can, under spirit of the present utility model and category, modify or change above-described embodiment.Therefore, have in technical field under such as and conventionally know that the knowledgeable modifies or changes not departing from all equivalences that complete under spirit that the utility model discloses and technological thought, must be contained by claim of the present utility model.