CN107051822A - Injection apparatus based on double piezo-activators - Google Patents
Injection apparatus based on double piezo-activators Download PDFInfo
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- CN107051822A CN107051822A CN201710438410.8A CN201710438410A CN107051822A CN 107051822 A CN107051822 A CN 107051822A CN 201710438410 A CN201710438410 A CN 201710438410A CN 107051822 A CN107051822 A CN 107051822A
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- Prior art keywords
- striker
- support plate
- storage cavity
- end cap
- glue storage
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
- B05C11/1026—Valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The present invention relates to a kind of injection apparatus based on double piezo-activators, the injecting type point glue equipment dispensing frequency which solves existing piezoelectric actuator driving is low, slow-footed technical problem.It includes the symmetrically arranged two groups of firing pin type injection equipments driven by piezoelectric actuator, and triangular nozzle valve, there is angle between two groups of firing pin type injection equipments, the bottom surface of triangular nozzle valve is connected with nozzle, symmetrically arranged left glue storage cavity and right glue storage cavity are provided with triangular nozzle valve, triangular nozzle valve leads glue chamber provided with a left side and glue chamber is led on the right side, lead glue chamber and connected with left glue storage cavity in a left side, lead glue chamber and connected with right glue storage cavity in the right side, plastic squeeze chamber is provided with nozzle, the bottom of nozzle is provided with the spout connected with plastic squeeze chamber, left glue storage cavity, right glue storage cavity is connected with plastic squeeze chamber respectively, the bottom of left striker is located in left glue storage cavity, the bottom of right striker is located in right glue storage cavity.The present invention is widely used in point gum machine.
Description
Technical field
The present invention relates to a kind of injecting type point glue equipment, in particular to a kind of injection based on double piezo-activators
Device.
Background technology
In microelectronics technology, point gum machine equipment conventional in being electronic product machining and encapsulating.With integrated circuit
Increasingly show complication and be miniaturized, semiconductor package reload request have smaller size, more leads, it is closeer in connect
Line etc., requirement to dispensing technology also more and more higher.The hammer-driven glue based on high-frequency components such as piezoelectric ceramics commonly used at present
The injecting type dispensing technology of liquid distribution, it is sprayed at a high speed using the hammer-driven glue of dither out of nozzle, with reaction
Speed is fast, the advantage that glue drop volume is small, assignment accuracy is high.This technology is accurately distributed fluid in a controlled manner, can
The fluid (solder flux, conducting resinl, epoxy resin and adhesive etc.) of desirable amount is transferred to workpiece (chip, electronic component etc.)
Correct position.
Authorization Notice No. discloses a kind of piezoelectric actuator driving for CN103157577B Chinese invention patent
Injecting type point glue equipment, including drive mechanism, injection equipment, glue conveying mechanism and support connecting frame, Piezoelectric Driving machine
Structure includes rhombus amplification module and piezo-activator, and injection equipment includes striker, and rhombus amplification module upper end is connected with support
Frame is connected, and lower end is connected with striker upper surface, and piezo-activator is clamped in the left side inside rhombus amplification module
Between right side, piezo-activator and rhombus amplification module are fixed on one by hole of the screw through rhombus amplification module left end
Rise, V-groove is provided with the right side inside rhombus amplification module, the domed ends of piezo-activator are withstood in the V-groove.Water chestnut
Shape amplification module is substantially a kind of displacement amplifying mechanism.The injecting type point glue equipment has fast response time, glue small volume
Advantage, but there is also following deficiency for the device：
The vibration frequency of piezoelectric actuator is very high, can reach 15KHz, still, due to the displacement of rhombus amplification module
Amplification not in time, causes the vibration frequency of striker to can only achieve 100Hz, it is difficult to further improve, the frequency of final output drop
Also 80-100Hz can only be reached, dispensing speed is slow, it is impossible to meet the high standards of current dispenser system.
The content of the invention
The present invention is exactly in order to which the injecting type point glue equipment dispensing frequency for solving existing piezoelectric actuator driving is low, speed
There is provided a kind of dispensing frequency is high, the fireballing injection apparatus based on double piezo-activators for the slow technical problem of degree.
The present invention uses two sets of piezoelectric ceramics and striker, symmetrically placed, and fully there is provided a set of double for application lever amplification principle
The micro- spray valve arrangement of piezoelectricity firing pin type colloid.
The technical scheme is that, including left support plate, right support plate, left piezoelectric actuator, right piezoelectric ceramics
Actuator, left dislocation enlarger, right displacement amplifying mechanism, left injection equipment, right injection equipment and triangular nozzle valve, left pressure
Electroceramics actuator is connected in left support plate, and right piezoelectric actuator is connected in right support plate, and left injection equipment passes through
Left dislocation enlarger is connected with left piezoelectric actuator, and right injection equipment passes through right displacement amplifying mechanism and right piezoelectric ceramics
Actuator is connected, and left injection equipment is provided with left striker, and right injection equipment is provided with right striker；Left striker and right striker are symmetrical arranged,
Angle is provided between left striker and right striker；
The bottom surface of triangular nozzle valve is connected with nozzle, triangular nozzle valve is provided with left glue storage cavity and right storage from top to bottom
Glue chamber；Left glue storage cavity and right glue storage cavity are symmetrical arranged, the angle being provided between the two, triangular nozzle valve provided with a left side lead glue chamber and
Glue chamber is led on the right side, and a left side is led glue chamber and connected with left glue storage cavity, and the right side is led glue chamber and connected with right glue storage cavity；Plastic squeeze chamber, nozzle are provided with nozzle
Bottom be provided with spout, spout connected with plastic squeeze chamber, and left glue storage cavity is connected with plastic squeeze chamber, and right glue storage cavity is connected with plastic squeeze chamber；
The bottom of left striker is located in left glue storage cavity, and the bottom of right striker is located in right glue storage cavity.
Preferably, left dislocation enlarger includes left connecting rod and left axle, and left injection equipment includes upper left end cap and left spring,
Upper left end cap is connected in left support plate, and left axle, which is fixedly connected in left support plate, upper left end cap, is provided with upper left linear bearing, left
Striker is passed through and left flange is connected with the middle part of upper left linear bearing, left striker, and left spring is located between upper left end cap and left flange；
One end of left connecting rod is together with the top hinge of left striker, and the other end is rotated with left axle and is connected；Left piezoelectric actuator
Top end face is contacted with the middle part bottom surface of left connecting rod；
Right displacement amplifying mechanism includes right connecting rod and right axle, and right injection equipment includes upper right end cap and right spring, upper right side
Lid is connected in right support plate, and right axle is fixedly connected in right support plate, and upper right linear bearing, right striker are provided with upper right end cap
Through upper right linear bearing, right flange is connected with the middle part of right striker, right spring is located between upper right end cap and right flange；Right company
One end of bar is together with the top hinge of right striker, and the other end is rotated with right axle and is connected；The top of right piezoelectric actuator
End face is contacted with the middle part bottom surface of right connecting rod.
Preferably, left injection equipment also includes lower-left end cap and left adjusting nut, and lower-left end cap is connected in left support plate,
Lower-left end cap is provided with lower-left linear bearing, and left adjusting nut is connected with the lower thread of upper left end cap, and left adjusting nut is enclosed on a left side
On striker, left spring is located between left adjusting nut and left flange；
Right injection equipment also includes bottom right end cap and right adjusting nut, and bottom right end cap is connected in right support plate, bottom righthand side
Bottom right linear bearing is covered with, right adjusting nut is connected with the lower thread of upper right end cap, and right adjusting nut is enclosed on right striker,
Right spring is located between right adjusting nut and right flange.
Being preferably based on the injection apparatus of double piezo-activators includes back seat, and the bottom of back seat is provided with triangular nozzle valve
Installation portion, the top of back seat is provided with left support plate location division and right support plate location division, and left support plate leans against left support plate positioning
In portion, right support plate is leaned against on right support plate location division.
Preferably, the angle between left striker and right striker is 10 °~160 °.
Preferably, the angle between left striker and right striker is 30 °, and the angle between left glue storage cavity and right glue storage cavity is
30°。
Preferably, the first laser displacement transducer for detecting left striker amplitude, right support are connected with left support plate
The second laser displacement transducer for detecting right striker is connected with plate, being provided with nozzle is used to detect that nozzle sprays liquid
The image collecting device of the volume of drop；
The injection apparatus based on double piezo-activators is controlled using two close cycles self-adaptation control method：
RBF neural parameterized model is set up, the fractional order PI that RBF neural carries out self-adaptive sites is constructed byλDμController, utilizes RBF neural fractional order PIλDμController realizes the accurate control to two striker amplitudes；
Droplet size is controlled using fuzzy-adjustable PID algorithm.
The beneficial effects of the invention are as follows, fully combine that piezoelectric ceramic vibrator dynamic frequency is fast, displacement it is accurate with firing pin type driving
Power is big, be adapted to the advantage of high viscosity liquid distribution, while using lever principle by the small Amplitude amplification of piezoelectric ceramics, can be by
Quickly high viscosity liquid is ejected；And two piezoelectric ceramics take turns to operate, the work of distribution liquid is more improved
Efficiency, makes the injection frequency of drop reach 200Hz~500Hz.Microelectronics Packaging field on current domestic market is improved to distribute
The operating efficiency of colloid.
Further aspect of the present invention, by the description of detailed description below, is clearly stated that.
Brief description of the drawings
Fig. 1 is the stereogram of the injection apparatus based on double piezo-activators；
Fig. 2 is the stereogram of the injection apparatus based on double piezo-activators；
Fig. 3 is the front view of the injection apparatus based on double piezo-activators；
Fig. 4 is the right view of the injection apparatus based on double piezo-activators；
Fig. 5 is the top view of the injection apparatus based on double piezo-activators；
Fig. 6 is the upward view of the injection apparatus based on double piezo-activators；
Fig. 7 is the sectional view in A-A directions in Fig. 5；
Fig. 8 is top and the connection diagram of right connecting rod of right striker；
Fig. 9 is the right view of structure shown in Fig. 8；
Figure 10 is the sectional view in B-B directions in Fig. 8；
Figure 11 is the top view of structure shown in Fig. 8；
Figure 12 is the stereogram of right connecting rod；
Figure 13 is the front view of right connecting rod；
Figure 14 is the top view of right connecting rod；
Figure 15 is the connection diagram of right striker and triangular nozzle valve；
Figure 16 is the stereogram of triangular nozzle valve；
Figure 17 is the stereogram of triangular nozzle valve；
Figure 18 is the front view of triangular nozzle valve；
Figure 19 is the top view of triangular nozzle valve；
Figure 20 is the sectional view of C-C in Figure 19；
Figure 21 is the sectional view of D-D in 18；
Figure 22 is the sectional view of E-E in 18；
Figure 23 is the perspective view of triangular nozzle valve；
Figure 24 is the schematic diagram of nozzle；
Figure 25 is the sectional view of nozzle；
Figure 26 is the stereogram of back seat；
Figure 27 is the front view of back seat；
Figure 28 is the top view of back seat；
Figure 29 is to waveform diagram electric on two piezoelectric actuators；
Figure 30 is two striker alternation schematic diagrames；
Figure 31 is the installation diagram of first laser displacement transducer, second laser displacement transducer and image collecting device；
Figure 32 is the flow chart being controlled according to the volume of ejection drop and the vibration amplitude of striker；
Figure 33 is double-closed-loop control method schematic diagram；
Figure 34 is inner ring striker control algolithm schematic diagram.
Symbol description in figure：
1. back seat, 2. left support plates, 3. right support plates, 4. rubber-storing cylinder supports, 5. triangular nozzle valves, 5-1. nozzles, 5-
Glue chamber is led on 1-1. plastic squeeze chambers, 5-1-2. spouts, 501. left glue storage cavities, 502. right glue storage cavities, 503. left sides, and glue chamber, 6. are led in 504. right sides
Rubber-storing cylinder, 7. lead sebific duct, 8. left joints, 9. right connectors, 10. left piezoelectric actuators, 11. right piezoelectric actuators, 12.
Holding tank at the top of left connecting rod, 13. right connecting rods, 131. right rotation holes, 132. pans, 133. right strikers, 14. left electroceramics actuatings
Device link, 15. right electroceramics actuator links, 16. left axles, 17. right axles, 18. left strikers, 19. right strikers, 191. right sides are hit
The top of pin, 20. upper left end caps, 21. upper right end caps, 22. lower-left end caps, 23. bottom right end caps, 24. left adjusting nuts, 25. is right
Adjusting nut, 26. left springs, 27. right springs, 28. left flanges, 29. right flanges, 30. upper left linear bearings, 31. lower-left straight lines
Bearing, 32. upper right linear bearings, 33. bottom right linear bearings, 34. right pins, 35. right nuts.101. triangular nozzle valve is installed
Portion, 102. left support plate location divisions, 103. right support plate location divisions.36. first laser displacement transducer, 37. second lasers position
Displacement sensor, 38. image collecting devices.
Embodiment
Referring to the drawings, the present invention is described in further detail with specific embodiment.
As shown in Fig. 1-7,15, the injection apparatus based on double piezo-activators includes back seat 1, left support plate 2, right support plate
3rd, rubber-storing cylinder support 4, triangular nozzle valve 5, rubber-storing cylinder 6, lead sebific duct 7, left joint 8, right connector 9, left piezoelectric actuator
10th, right piezoelectric actuator 11, left connecting rod 12, right connecting rod 13, left axle 16, right axle 17, left striker 18, right striker 19, upper left
End cap 20, upper right end cap 21, lower-left end cap 22, bottom right end cap 23, left adjusting nut 24, right adjusting nut 25, left spring 26, the right side
Spring 27, upper left linear bearing 30, lower-left linear bearing 31, upper right linear bearing 32, bottom right linear bearing 33.
Left support plate 2 is arranged on the left side of back seat 1, and right support plate 3 is arranged on the right side of back seat 1, left support plate 2 and right branch
Fagging 3 is symmetrical arranged, and there is certain angle.Rubber-storing cylinder 6 is arranged on back seat 1 by rubber-storing cylinder support 4, and rubber-storing cylinder 6 is located at
Between left support plate 2 and right support plate 3.Triangular nozzle valve 5 is arranged on the lower section of left support plate 2 and right support plate 3.Lead sebific duct
7 are connected with rubber-storing cylinder 6, and one end of left joint 8 is connected with leading sebific duct 7, and the other end is connected with triangular nozzle valve 5；Right connector 9
One end is connected with leading sebific duct 7, and the other end is connected with triangular nozzle valve 5.The output point two-way of sebific duct 7 is led respectively by left joint
8th, right connector 9 is connected with two glue storage cavities in triangular nozzle valve 5.
Left piezoelectric actuator 10 is arranged in left support plate 2 by left electroceramics actuator link 14, left upper end
Lid 20 is connected to the top of left support plate 2, and lower-left end cap 22 is connected to the bottom of left support plate 2.Provided with a left side in upper left end cap 20
Lower-left linear bearing 31 is provided with upper linear bearing 30, lower-left end cap 22, left striker 18 sequentially passes through the He of upper left linear bearing 30
Lower-left linear bearing 31.The middle part of left striker 18 is connected with left flange 28, the bottom spiral shell of left adjusting nut 24 and upper left end cap 20
Line is connected, and left adjusting nut 24 is enclosed on left striker 18, and left spring 26 is located between left adjusting nut 24 and left flange 28.Zuo Lian
One end of bar 12 is together with the top hinge of left striker 18, and the other end and left axle 16, which are rotated, is connected that (left connecting rod 12 can be with a left side
Axle 16 is fulcrum).Left axle 16 is fixedly connected in left support plate 2.The top end face of left piezoelectric actuator 10 is provided with
Hemisphere jut, the hemisphere jut is contacted with the middle part bottom surface of left connecting rod 12.
Right piezoelectric actuator 11 is arranged in right support plate 3 by right electroceramics actuator link 15, upper right side
Lid 21 is connected to the top of right support plate 3, and bottom right end cap 23 is connected to the bottom of right support plate 3.Provided with the right side in upper right end cap 21
Bottom right linear bearing 33 is provided with upper linear bearing 32, bottom right end cap 23, right striker 19 sequentially passes through the He of upper right linear bearing 32
Bottom right linear bearing 33.The middle part of right striker 19 is connected with right flange 29, the bottom spiral shell of right adjusting nut 25 and upper right end cap 21
Line is connected, and right adjusting nut 2 is enclosed on right striker 19, and right spring 27 is located between right adjusting nut 25 and right flange 29.Right company
One end of bar 13 is together with the top hinge of right striker 19, and the other end and right axle 17, which are rotated, is connected that (right connecting rod 13 can be with the right side
Axle 17 is fulcrum).Right axle 17 is fixedly connected in right support plate 3.The top end face of right piezoelectric actuator 11 is provided with
Hemisphere jut, the hemisphere jut is contacted with the middle part bottom surface of right connecting rod 13.
Left spring 26, right spring 27 are compressed when striker is lifted, and tension force of spring declines striker.
Connected between one side of triangular nozzle valve 5 and lower-left end cap 22 by zero type sealing ring, another side
It is connected between bottom right end cap 23 by zero type sealing ring.
As seen in figures 8-14, one end of right connecting rod 13 is provided with right rotation hole 131, and the other end is provided with holding tank at the top of right striker
133, the both sides of right striker top holding tank 133 are provided with pan 132.Right axle 17 passes through right rotation hole 131.The top of right striker 19
Portion is provided with through hole, and right pin 34 passes through the through hole at pan 132 and the top of right striker 19, one end of right nut 35 and right pin 34
Connection.Right pin 34 can be moved in pan 132.
Left connecting rod 12 is identical with the structure of right connecting rod 13, and the top of left striker 18 is provided with through hole, the top of left striker 18 and
The connected mode of left connecting rod 12 is identical with the connected mode at the right top of striker 19 and right connecting rod 13.Left axle 16 passes through the end of left connecting rod 12
The left rotation hole in portion.
As shown in Figure 16-25, triangular nozzle valve 5 is overall triangular in shape.The bottom surface of triangular nozzle valve 5 is connected with nozzle
5-1.Left glue storage cavity 501 and right glue storage cavity 502, left glue storage cavity 501 and right glue storage cavity are provided with triangular nozzle valve 5 from top to bottom
502 are symmetrical arranged, between the two in the presence of 30 ° angle (30 ° of simply optimal cases, the scope of this angle can be 10 °~
160°).30 ° of angle can make the frequency of ejection drop reach highest and most stable.Set from front to back in triangular nozzle valve 5
Have that glue chamber 503 is led on a left side and glue chamber 504 is led on the right side.A left side is led glue chamber 503 and connected with left glue storage cavity 501, and glue chamber 504 and right glue storage cavity are led in the right side
502 connections.
Lead glue chamber 503, the right entrance for leading glue chamber 504 and be located at the front of triangular nozzle valve 5 in a left side.Lead glue chamber 503, the right side and lead in a left side
The entrance of glue chamber 504 is connected with left joint 8, right connector 9 respectively.
The entrance of left glue storage cavity 501 is located at a side of triangular nozzle valve 5, and the entrance of right glue storage cavity 502 is located at three
Another side of Callous pad valve 5.The bottom of left striker 18 is located in left glue storage cavity 501, and the bottom of right striker 19 is located at the right side
In glue storage cavity 502.Angle between left striker 18 and right striker 19 is 30 °, and 30 ° are that optimal case (makes the frequency of ejection drop
Rate reaches highest and most stable), the scope of this angle can be 10 °~160 °.
The bottom provided with plastic squeeze chamber 5-1-1, nozzle 5-1 is provided with spout 5-1-2, spout 5-1-2 and plastic squeeze chamber in nozzle 5-1
5-1-1 is connected.The lower end of left striker 18 is stretched into plastic squeeze chamber 5-1-1, and the lower end of right striker 19 stretches into plastic squeeze chamber 5-
In 1-1.Left glue storage cavity 501 is connected with plastic squeeze chamber 5-1-1, and right glue storage cavity 502 is connected with plastic squeeze chamber 5-1-1.
As shown in figures 26-28, the bottom of back seat 1 is provided with triangular nozzle valve installation portion 101, and the top of back seat 1 is provided with a left side
Supporting plate location division 102 and right support plate location division 103.When installing left support plate 2, left support plate 2 is leaned against into left support plate
On location division 102.When installing right support plate 3, right support plate 3 is leaned against on right support plate location division 103.Because left support plate
Have certain angle between location division 10 and right support plate location division 103, this ensures that left support plate 2 and right support plate 3 it
Between keep certain angle.Because upper left end cap 20, lower-left end cap 22 are connected in left support plate 2, upper right end cap 21, bottom right end cap
23 are connected in right support plate 3, accordingly, it is determined that the angle of inclination of left support plate 2, just can determine that upper left end cap 20 and lower-left end
The angle of inclination of the place straight line of lid 22, further determined that the angle of inclination of left striker 18；The inclination angle of right support plate 3 is determined
Degree, just can determine that the angle of inclination of upper right end cap 21 and the place straight line of bottom right end cap 23, further determined that inclining for right striker 19
Rake angle.Finally, it is ensured that the angle between left striker 18 and right striker 19.
The course of work of the injection apparatus based on double piezo-activators is described below：
With reference to Figure 29 and 30, external signal generator sends two-way alternating signal, drives two piezoelectric actuator wheels
Flow alternation；
Step (1)：To the left high level of piezoelectric actuator 10, left piezoelectric actuator 10 is extended, and left striker 18 is lifted
Rise；Low level is supplied to another right piezoelectric actuator 11 simultaneously, right striker 19 declines, the end of right striker 19 is by nozzle
Glue in 5-1 in plastic squeeze chamber 5-1-1 is ejected from spout 5-1-2, forms drop.
Step (2)：To the left low level of piezoelectric actuator 10, left piezoelectric actuator 10 declines, under left striker 18
Drop；High level is supplied to another right piezoelectric actuator 11 simultaneously, right striker 19 is lifted, the end of left striker 18 is by nozzle
Glue in 5-1 in plastic squeeze chamber 5-1-1 is ejected from spout 5-1-2, forms drop.
Step (3)：Return to above-mentioned steps (1).
T in Figure 29 represents drop ejection cycle.
As shown in figure 31, in order to ensure product reliability of operation, increase sets first laser displacement transducer 36, second
Laser displacement sensor 37 and image collecting device 38.First laser displacement transducer 36 is arranged in left support plate 2, close to left
At connecting rod, at left striker extended line.Second laser displacement transducer 37 is arranged in right support plate 2, and at right connecting rod, the right side is hit
At pin extended line.Image collecting device 38 is arranged close at nozzle 5-1.
Image collecting device 38 can use the high-speed camera based on CCD, LED/light source and camera lens.
First laser displacement transducer 36 is used to detect the amplitude of the dither of left striker 18, second laser
Displacement sensor 37 is used to detect the amplitude of the dither of right striker 19.Image collecting device 38 is used to detect nozzle 5-
1 sprays the volume of drop.
As illustrated in figs. 32-34, control system detects the volume of drop by image collecting device 38, and drop is drawn
Point, identification is left striker or the lower drop sprayed of right striker effect.Left and right striker alternately vibrates, and the drop of each self-forming is successive
Spray, the 1st, 3,5 ... individual drops are formed such as in the presence of left piezoelectric actuator 10, in right piezoelectric actuator 11
Effect is lower to form the 2nd, 4,6 ... individual drops.Shaking for a striker is adjusted subsequently through detection the 1st, 3, the volumes of 5 ... numbers drops
Width, the amplitude of right striker is adjusted by detection the 2nd, 4, the volumes of 6 ... numbers drops.
Then, two close cycles Self Adaptive Control is carried out, inner ring accurately controls striker to vibrate, outer shroud carries out volume detection and control
Fuzzy self-adaption two close cycles intelligent control method, realize that the micro accurate, volume of drop in the range of different viscosities is controllable, quick
Self-adjusted block operation.Comprise the concrete steps that：
RBF neural parameterized model is set up, association colloid high frequency, the demand of accurate micro- spray are constructed by RBF nerves
Network carries out the fractional order PI of self-adaptive sitesλDμController；Utilize RBF neural fractional order PIλDμController is realized to two
The accurate control of individual striker amplitude.
Realize the accurate control that droplet size is distributed high frequency using fuzzy-adjustable PID algorithm.
The uniformity consistency for ejecting drop is ensure that by above-mentioned control method.
Using lever principle, the vibration displacement amount of foregoing left piezoelectric actuator 10 is amplified by left connecting rod 12, right piezoelectricity
The vibration displacement amount of ceramic actuator 11 is amplified by right connecting rod 13.Finally vibrate left striker 18 and right striker 19.Need explanation
, in addition to the displacement equations structure of leverage, other displacement amplifying mechanisms, such as rhombus amplification module can also be used
Deng.
It is foregoing upper left end cap 20, lower-left end cap 22, upper left linear bearing 30, lower-left linear bearing 31, left striker 18, left
The mechanism that adjusting nut 24, left flange 28, left spring 26 are constituted is the injection equipment based on striker, it is necessary to which explanation, goes back
The injection equipment of other structures form can be used, as long as can vibrate striker with displacement amplifying mechanism matching connection.
Similarly, shifting enlarger, the injection equipment in right support plate 3 can be changed.
It is described above to be not intended to limit the invention only to the preferred embodiments of the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.
Claims (7)
1. a kind of injection apparatus based on double piezo-activators, it is characterised in that including left support plate, right support plate, left piezoelectricity
Ceramic actuator, right piezoelectric actuator, left dislocation enlarger, right displacement amplifying mechanism, left injection equipment, right spraying machine
Structure and triangular nozzle valve, the left piezoelectric actuator are connected in left support plate, and the right piezoelectric actuator connects
It is connected in right support plate, the left injection equipment is connected by left dislocation enlarger with left piezoelectric actuator, the right side
Injection equipment is connected by right displacement amplifying mechanism with right piezoelectric actuator, and the left injection equipment is provided with left striker, right
Injection equipment is provided with right striker；The left striker and right striker are symmetrical arranged, and angle is provided between left striker and right striker；
The bottom surface of the triangular nozzle valve be connected with nozzle, the triangular nozzle valve from top to bottom provided with left glue storage cavity and
Right glue storage cavity；The left glue storage cavity and right glue storage cavity are symmetrical arranged, and the angle being provided between the two, the triangular nozzle valve is set
Have that glue chamber is led on a left side and glue chamber is led on the right side, a left side is led glue chamber and connected with left glue storage cavity, and the right side is led glue chamber and connected with right glue storage cavity；In the nozzle
Provided with plastic squeeze chamber, the bottom of the nozzle is provided with spout, and spout is connected with plastic squeeze chamber, and the left glue storage cavity is connected with plastic squeeze chamber,
Right glue storage cavity is connected with plastic squeeze chamber；
The bottom of the left striker is located in left glue storage cavity, and the bottom of right striker is located in right glue storage cavity.
2. the injection apparatus according to claim 1 based on double piezo-activators, it is characterised in that：
The left dislocation enlarger includes left connecting rod and left axle, and the left injection equipment includes upper left end cap and left spring, institute
State upper left end cap to be connected in left support plate, the left axle is fixedly connected in left support plate, provided with a left side in the upper left end cap
Upper linear bearing, the left striker passes through and is connected with left flange, the left spring in the middle part of upper left linear bearing, the left striker
Between upper left end cap and left flange；One end of the left connecting rod is together with the top hinge of left striker, the other end and a left side
Axle rotates connection；The top end face of the left piezoelectric actuator is contacted with the middle part bottom surface of left connecting rod；
The right displacement amplifying mechanism includes right connecting rod, right axle, and the right injection equipment includes upper right end cap and right spring, described
Upper right end cap is connected in right support plate, and the right axle is fixedly connected on straight provided with upper right in right support plate, the upper right end cap
Bobbin is held, and the right striker is passed through and is connected with right flange in the middle part of upper right linear bearing, the right striker, and the right spring is located at
Between upper right end cap and right flange；One end of the right connecting rod is together with the top hinge of right striker, the other end and natural pivot
Dynamic connection；The top end face of the right piezoelectric actuator is contacted with the middle part bottom surface of right connecting rod.
3. the injection apparatus according to claim 2 based on double piezo-activators, it is characterised in that the left injection equipment
Also include lower-left end cap and left adjusting nut, the lower-left end cap is connected in left support plate, the lower-left end cap is provided with lower-left
Linear bearing, left adjusting nut is connected with the lower thread of upper left end cap, and left adjusting nut is enclosed on left striker, the left spring
Between left adjusting nut and left flange；
The right injection equipment also includes bottom right end cap and right adjusting nut, and the bottom right end cap is connected in right support plate, institute
State bottom righthand side and be covered with bottom right linear bearing, right adjusting nut is connected with the lower thread of upper right end cap, and right adjusting nut is enclosed on
On right striker, the right spring is located between right adjusting nut and right flange.
4. the injection apparatus according to claim 3 based on double piezo-activators, it is characterised in that based on double piezoelectric actuated
The injection apparatus of device includes back seat, and the bottom of back seat is provided with triangular nozzle valve installation portion, and the top of the back seat is provided with left branch
Fagging location division and right support plate location division, the left support plate are leaned against on left support plate location division, and the right support plate is leaned against
On right support plate location division.
5. the injection apparatus based on double piezo-activators according to claim 1-4 any one, it is characterised in that described
Angle between left striker and right striker is 10 °~160 °.
6. the injection apparatus according to claim 5 based on double piezo-activators, it is characterised in that the left striker and the right side
Angle between striker is 30 °, and the angle between the left glue storage cavity and right glue storage cavity is 30 °.
7. the injection apparatus according to claim 6 based on double piezo-activators, it is characterised in that in the left support plate
It is connected with the first laser displacement transducer for detecting left striker amplitude, the right support plate and is connected with for detecting that the right side is hit
The second laser displacement transducer of pin, being provided with nozzle is used for the image collector for detecting the volume that nozzle sprays drop
Put；
The injection apparatus based on double piezo-activators is controlled using two close cycles self-adaptation control method：
RBF neural parameterized model is set up, the fractional order PI that RBF neural carries out self-adaptive sites is constructed byλDμControl
Device processed, utilizes RBF neural fractional order PIλDμController realizes the accurate control to two striker amplitudes；
Droplet size is controlled using fuzzy-adjustable PID algorithm.
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| CN201710438410.8A CN107051822B (en) | 2017-06-12 | 2017-06-12 | Injection device based on dual piezoelectric actuators |
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Cited By (1)
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| CN112965367A (en) * | 2020-09-01 | 2021-06-15 | 江苏高凯精密流体技术股份有限公司 | Piezoelectric ceramic injection valve adjusting method based on current sensor |
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| CN112965367B (en) * | 2020-09-01 | 2022-06-17 | 江苏高凯精密流体技术股份有限公司 | Piezoelectric ceramic injection valve adjusting method based on current sensor |
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| CN107051822B (en) | 2022-07-12 |
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