CN107498854A - A kind of ultrasonic plastifying fusion deposition modeling 3D printing device - Google Patents
A kind of ultrasonic plastifying fusion deposition modeling 3D printing device Download PDFInfo
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- CN107498854A CN107498854A CN201710935050.2A CN201710935050A CN107498854A CN 107498854 A CN107498854 A CN 107498854A CN 201710935050 A CN201710935050 A CN 201710935050A CN 107498854 A CN107498854 A CN 107498854A
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- guide groove
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention provides a kind of ultrasonic plastifying fusion deposition modeling 3D printing device, including support, print unit, for the material of melting to be delivered into the printhead unit and material melts unit that print unit printed；Support includes the first workbench for being provided with printhead unit and material melts unit and the second workbench for being provided with print unit；Material melts unit includes the ultrasonic system for fused materials, proportioning device and the drive system for driving ultrasonic system to move, and proportioning device includes connecting rod, left plate and right panel；Connecting rod one end is arranged in the cavity of second base, and the other end stretches out cavity and is connected by the first connecting plate with ultrasonic system；Left plate is arranged in cavity, and the one end being arranged on connecting rod in cavity is fixed；Right panel corresponds to left plate and is arranged in cavity and certain distance is set between right panel and left plate, and right panel is set in connecting rod and can moved along connecting rod.The present invention is melted using ultrasonic power, and melting speed is faster.
Description
Technical field
The present invention relates to 3D printing technique field, particularly, is related to a kind of ultrasonic plastifying fusion deposition modeling 3D printing dress
Put.
Background technology
3D printing technique is more and more used to manufacture parts in recent years, and its technical characteristic successively manufactured is compared to tradition
Manufacturing technology can faster, more personalizedly manufacture parts.This technology is equal in weaponry, automobile, medical science, building field
It is widely used, but due to the limitation of machine dimensions, material, cost etc., stage of the 3D printing technique still in exploitation.
The raw material form of 3D printing at present mainly has thread, powdered, three kinds of forms of graininess, and corresponding 3D printing is set
It is standby because its different process principle of the form of material is slightly distinguished, wherein granular material is new material form, its price
More cheap, easy obtained and excellent material performance.
3D printer operation principle using filamentary material is fusion sediment technology, the structure of this equipment it is relatively simple but
Formed precision is relatively low, and shaping speed is relatively slow；3D printer operation principle using powder material is powder curing sintering
Technology, this equipment can manufacture complex component or mould, but sample surface is coarse, and graininess is presented；Use granular material
3D printer operation principle is also fusion sediment technology, has simply used the combining structure of screw rod and heating coil, has specially existed
Heating coil fused materials are set at charging aperture, then material is sheared and extruded to nozzle using screw rod rotation, its
Structure but to more complex, machining accuracy is of a relatively high, but screw-rod structure has two big shortcomings：First, screw diameter is larger：At one
Screw thread is processed on axle can obtain screw rod, therefore its diameter can not do too small, otherwise can be broken at tooth root；2nd,
Material is perishable：Because heating coil fused materials need the regular hour, therefore material can rest on barrel the long period
It is interior.
The content of the invention
Present invention aims at providing a kind of 3D printing device simple in construction, easy to operate, with reach can to quickly and
The purpose quantitatively printed.
To achieve the above object, the invention provides a kind of ultrasonic plastifying fusion deposition modeling device, including support, printing
Unit, printhead unit and material melts unit；
The support includes the first workbench and the second workbench setting up and down, and first workbench is set
There is printhead unit and the material melts unit, the print unit is provided with second workbench；
The material melts unit includes ultrasonic system, proportioning device and drive system, and the proportioning device includes connecting
Extension bar, left plate and right panel；
Described connecting rod one end is arranged in the cavity of second base, and the other end stretches out the cavity and by the first connection
Plate is connected with the ultrasonic system so that the proportioning device and the ultrasonic system being capable of synchronizing movings；
The left plate is arranged in the cavity, and the one end being arranged on the connecting rod in cavity is fixed；The right side
Plate corresponds to the left plate and is arranged in the cavity and is provided with certain distance between the right panel and the left plate；The right panel
It is set in the connecting rod and can be moved along the connecting rod, so as to adjusts the spacing control between the right panel and the left plate
The amount of material processed；
The ultrasonic system is used for fused materials, and the drive system is used to drive the ultrasonic system to move forward and backward, from
And ultrasonic system is caused to melt the material that the proportioning device measures；The printhead unit is used to the material of melting being delivered to
Print unit is printed.
Especially, the ultrasonic system includes tool heads, ultrasonic transformer and the transducer being sequentially connected, the tool heads
First end is stretched into the second end of the horizontal channel for being arranged on first base, and the second end of the tool heads passes through ultrasonic transformer and institute
State transducer connection；The first base is fixed on the first workbench, and is arranged at the lower section of the second base；It is described
The size of horizontal channel matches with the tool heads so that the tool heads can move forward and backward in the horizontal channel；It is described
Interface channel is connected with the outside of the first end of horizontal channel, the interface channel connects the printhead unit so that by super
The material of sound system melting can enter the printhead unit by the interface channel.
Especially, the interface channel uses spring needle valve type nozzle, and the opening direction of the spring needle valve type nozzle
The printhead unit.
Especially, the upper surface of the second base is provided with barrel, and the outlet of the barrel is led in the cavity；Institute
State and a passage is provided with below cavity, the both ends of the passage connect the cavity and the horizontal channel respectively；It is described
First end of the passage close to the horizontal channel is set.
Especially, the drive system uses ball-screw-transmission, and the drive system is put down including being arranged on the first work
Driving guide groove on platform and the driving slide unit along driving guide groove movement；The transducer by the 3rd L-shaped connecting plate with it is described
Slide unit connection is driven, the riser of the 3rd L-shaped connecting plate is set at the stationary point of the transducer, its transverse slat and the driving
Slide unit connects so that can drives ultrasonic system to advance while the driving slide unit forward slip of drive system.
Especially, the printhead unit includes speed increasing mechanism and toggle, and the speed increasing mechanism is used to provide
The power of crank and connecting rod movement；
Motor, shaft coupling, gear wheel and the little gear that the speed increasing mechanism includes, the motor are arranged on motor cabinet；
The both ends of the shaft coupling are connected with the motor and the gear wheel respectively, the gear wheel and little gear engagement, institute
State shaft coupling described in motor driven to rotate, the bull gear drive is further driven to, so as to drive pinion rotation；
The toggle includes two eccentric mechanisms, connecting rod and piston, and two eccentric mechanisms pass through mutually
Connector is connected and is separately fixed on the madial wall of printhead base, and one of them described eccentric mechanism connects with the little gear
Connect, the rotation of the little gear drives two eccentric mechanisms to rotate；The connecting rod is arranged between two eccentric mechanisms
On connector, the connecting rod can move up and down with the rotation of the eccentric mechanism；The top of the piston and the connecting rod
Lower end connects, and the lower end of the piston be cone tip shape, the piston can with the connecting rod in the duct of printhead base it is upper and lower
It is mobile so that the piston can extrude the material of the melting of internal piston；It is additionally provided with the side wall of the piston one short
Pipe, the short tube connect the interface channel and the piston.
Especially, a printing nozzle is additionally provided with below the printhead base, the printing nozzle is beaten with described
Head base detachable connection is printed, is conveniently replaceable the printing nozzle；The printing nozzle is led in the lower end of the piston.
Especially, the lower outside of the printhead base is additionally provided with heating coil, and the heating coil is used to keep
The temperature of material, prevents material deterioration.
Especially, the print unit includes print platform, X to module, Y-direction module and Z-direction module, and the X is to mould
Group, Y-direction module and Z-direction module use ball-screw-transmission, and the print unit comprises at least one group of X to module；
The X is arranged on institute to slide unit, the X including X of the X to guide groove and along X to guide groove movement to module to guide groove
State on the second workbench；A chute is arranged with parallel with the X to guide groove, on second workbench in the chute
It is provided with first roller along the runner movement, the upper surface of first roller and the X are to the upper surface of slide unit
Positioned at same level；
The Y-direction module includes Y-direction guide groove and the Y-direction slide unit along Y-direction guide groove movement；The X is organized to cunning and the Y-direction
Using the first L-shaped connecting plate connection being vertically arranged between module, transverse slat one end of the first L-shaped connecting plate be arranged on X to
The upper surface of slide unit, the other end are arranged on the upper surface of first roller, and the Y-direction guide groove is arranged on first L-shaped and connected
On the riser of fishplate bar；
The Z-direction module includes Z-direction guide groove and the Z-direction slide unit along Z-direction guide groove movement, the back side of the Z-direction guide groove
Directly or indirectly it is connected with the Y-direction slide unit；
The print platform is connected by the second L-shaped connecting plate with the Z-direction slide unit, and the second L-shaped connecting plate is set
In the lower section of the print platform.
Apply the technical scheme of the present invention, have the advantages that：
1st, by carrying out the stress-strain analysis, (maximum of tool heads under conditions of intensity is met to ultrasonic vibration system
Strain is less than 0.1mm, and maximum stress is less than 2Mpa) minimum diameter of tool heads front end can narrow down to 5mm, contrast prior art
The minimum diameter of screw rod is 12mm, reduces nearly half, therefore the 3D printing device of the present invention is smaller, and structure is more
It is compact.
2nd, for compared to the form of coil heats, by the way of ultrasonic system carrying out melting can make material be shaken in ultrasound
Flashmelt under the dynamic and collective effect of pressure, faster, and this mode more saves the speed of material melts, is more convenient for controlling
System, the quality of melting are higher.
3rd, device of the invention can be by adjusting the diameter of printing nozzle discharging opening and the volume (spiral shell of adjustment quantitative device
Line structure) change the size of load, so as to adapting to different processing occasions and different required precisions.
4th, device of the invention is melted by ultrasonic system, is reused heating coil and is carried out isothermal holding, is transporting material
Undergone no deterioration during row, the quality of printing is higher.
5th, whole device of the present invention is compact-sized, light weight, is easy to make.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is further detailed explanation.
Brief description of the drawings
The accompanying drawing for forming the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.
In the accompanying drawings：
Fig. 1 is the inside overall structure diagram of 3D printing device in embodiment 1；
Fig. 2 is the outside overall structure diagram of 3D printing device in embodiment 1；
Fig. 3 is the structural representation of the print unit of 3D printing device in embodiment 1；
Fig. 4 is the structural representation of the printhead unit of 3D printing device in embodiment 1；
Fig. 5 is the structural representation of the material melts unit of 3D printing device in embodiment 1；
Fig. 6 is the structural representation connected in embodiment 1 between the printhead unit of 3D printing device and material melts unit
Figure；
Reference：
1st, support, the 11, first workbench, the 12, second workbench, 13, feeding mouth, 14, feeding door, 15, door closer,
16th, the second roller, 2, print unit, 21, print platform, 22, X to module, 221, X to guide groove, 222, X to slide unit, 23, Y-direction
Module, 231, Y-direction guide groove, 24, Z-direction module, 241, Z-direction guide groove, the 25, first L-shaped connecting plate, 26, chute, the 27, first roller,
3rd, printhead unit, 30, heating coil, 31, printhead base, 311, printing nozzle, 32, motor, 33, shaft coupling, 34, canine tooth
Wheel, 35, little gear, 36, motor cabinet, 37, eccentric mechanism, 38, connecting rod, 39, piston, 391, short tube, 4, material melts unit,
41st, ultrasonic system, 411, tool heads, 412, ultrasonic transformer, 413, transducer, the 414, first connecting plate, 42, barrel, the 43, first bottom
Seat, 431, horizontal channel, 432, passage, 44, second base, 441, cavity, 45, proportioning device, 451, connecting rod, 452, left
Plate, 453, right panel, 46, drive system, 461, driving guide groove, 462, driving slide unit, the 463, the 3rd L-shaped connecting plate, 47, spring needle
Valve type nozzle.
Embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can limit according to claim
Fixed and covering multitude of different ways is implemented.
Embodiment 1
Refer to Fig. 1, a kind of ultrasonic plastifying fusion deposition modeling 3D printing device, including support 1, print unit 2, printhead
Unit 3 and material melts unit 4.
In the present embodiment, the framework of the support is built by 4040 aluminium section bars, and right angle is used between section bar
Part is connected, and profiled ends are blocked with termination with nylon cover plate；The second roller 16 is installed in the bottom of the support, is easy to carry
Whole device.
The framework of the support is provided with two pieces of flat boards by angled piece, and framework is divided into setting up and down by two pieces of flat boards
One workbench 11 and the second workbench 12, first workbench are provided with printhead unit and the material melts list
Member, the print unit is set on second workbench.
Fig. 2 is referred to, is wrapped up outside the framework of the support with baffle plate, prevents external environment condition (such as dust in air etc.) shadow
Ring print quality.The support is provided with three layers of baffle plate of upper, middle and lower altogether, and three layers of baffle plate are each attached on framework, in the baffle plate of upper strata
Top at baffle plate setting there is a feeding mouth 13 to be easy to topple over material；The side shield and top flap acrylic material in middle level
Expect (PMMA), its transparency preferably, is easy to the process of observation processing；Bottom (lower floor) baffle plate plays a parcel.Middle level
A feeding door 14 is provided with one of side plate of baffle plate, feeding door is the opening ways spun upside down, is pacified on feeding door
Make to automatically reset equipped with a door closer 15.
Referring to Fig. 3, the print unit includes print platform 21, X to module 22, Y-direction module 23 and Z-direction module 24,
The X uses ball-screw-transmission to module, Y-direction module and Z-direction module, the print platform can with the X to module,
Y-direction module and Z-direction module move on XYZ directions.
The X is set including X of the X to guide groove 221 and along X to guide groove movement to module to slide unit 222, the X to guide groove
Put on second workbench；On second workbench chute 26, institute are arranged with parallel with the X to guide groove
State and first roller 27 along the runner movement is provided with chute, the upper surface of first roller and the X are to cunning
The upper surface of platform is located at same level.
The combination of the chute and first roller can also use same X to module replacement, and two X are to guide groove
It is set in parallel on second workbench, the both ends of the transverse slat of the first L-shaped connecting plate are separately positioned on two pieces of X to cunning
The upper surface of platform.
The combination of the chute and first roller can also use same X to module replacement, and two X are to guide groove
It is set in parallel on second workbench, the both ends of the transverse slat of the first L-shaped connecting plate are separately positioned on two pieces of X to cunning
The upper surface of platform.
The Y-direction module includes Y-direction guide groove 231 and the Y-direction slide unit along Y-direction guide groove movement；The X is to sliding group and described
Connected between Y-direction module using the first L-shaped connecting plate 25 being vertically arranged, transverse slat one end of the first L-shaped connecting plate is set
In X to the upper surface of slide unit, the other end is arranged on the upper surface of first roller, and the Y-direction guide groove connects along first L-shaped
The length direction of the riser of fishplate bar is set.
The Z-direction module includes Z-direction guide groove 241 and the Z-direction slide unit along Z-direction guide groove movement, the back of the body of the Z-direction guide groove
Face is fixed on the Y-direction slide unit.
The print platform is connected by the second L-shaped connecting plate with the Z-direction slide unit, and the second L-shaped connecting plate is set
In the lower section of the print platform.
Print unit uses screw nut driven, can make print platform in three high-precision movements in direction, this height
The positioning of precision make it that the quality of item of printing is higher, and size is more accurate.
Fig. 4 is referred to, the printhead unit includes speed increasing mechanism and toggle.
The speed increasing mechanism includes motor 32, shaft coupling 33, gear wheel 34 and little gear 35, and the motor is arranged on motor
On seat 36；The both ends of the shaft coupling are connected with the motor and the gear wheel respectively, the gear wheel and the little gear
Engagement, shaft coupling described in the motor driven rotate, and the bull gear drive are further driven to, so as to drive pinion rotation.
The speed increasing mechanism is increased the rotating speed of motor, so as to be provided for toggle bigger by gear wheel and little gear
Power.
The toggle includes two eccentric mechanisms 37, connecting rod 38 and piston 39, and described two eccentric mechanisms are mutual
Mutually connect and be separately fixed on the madial wall of printhead base 31 by connector, one of them described eccentric mechanism with it is described
Little gear connects, and the rotation of the little gear drives two eccentric mechanisms to rotate；The connecting rod is arranged on two eccentric songs
On connector between handle, the connecting rod can move up and down with the rotation of the eccentric mechanism；The top of the piston and institute
The lower end for stating connecting rod is connected by pin, and the lower end of the piston is cone tip shape, and the piston can be with the connecting rod in printhead
Moved up and down in the duct of base so that the piston can extrude the material of the melting of internal piston；The side wall of the piston
On be additionally provided with a short tube 391；A printing nozzle 311 is additionally provided with below the printhead base, the piston
Lead to the printing nozzle for lower end, is connected through a screw thread between the printing nozzle and the printhead base, is conveniently replaceable institute
State printing nozzle.
Connecting rod and piston in brace and connecting rod framework are provided in printhead chassis interior, but in order to clearly show that connecting rod
With the attachment structure of piston, the printhead base on right side has been carried out in Fig. 4 it is perpendicular cut open, that is, remove the knot of printhead chassis outer side
Structure, expose connecting rod and piston.
Printing piston is driven to pump by big little gear, eccentric mechanism and connecting rod, this mode can cause
The discharging of 3D printing device is more uniform, and print quality is higher.
The lower outside of the printhead base is additionally provided with heating coil 30, the temperature of the heating coil be it is constant,
The heating coil is used for the temperature for keeping material, prevents material deterioration, print quality is guaranteed.
Two auricles are additionally provided with below the printhead base, by the auricle bolts and nuts by printhead
Base is fixed on the first workbench.
Fig. 5-Fig. 6 is referred to, the material melts unit includes being used for by the ultrasonic system 41 of granular material melts, determined
Measure device 45 and drive system 46.
The ultrasonic system includes passing sequentially through tool heads 411, ultrasonic transformer 412 and the (work of transducer 413 of threaded connection
Screwed between tool head and ultrasonic transformer, between ultrasonic transformer and transducer using reverse thread so that ultrasonic vibration system is in work
As when occur without the situation of loosening)；The first end of the tool heads stretches into the of the horizontal channel 431 for being arranged on first base 43
In two ends, the second end of the tool heads is connected by ultrasonic transformer with the transducer；The first base is fixed on the first work
Make on platform, and be arranged at the lower section of the second base；The size of the horizontal channel matches with the tool heads so that institute
Stating tool heads can move forward and backward in the horizontal channel；Spring needle valve type spray is connected with the outside of the first end of the horizontal channel
Mouth 47, the spring needle valve type nozzle connect the short tube of the printhead unit so that the material energy melted by ultrasonic system
The printhead unit is entered by the spring needle valve type nozzle.It can be sprayed in print procedure by adjusting spring needle valve type
The spring force of mouth adjusts the injection pressure of material, so as to adjusting printing speed.
In order to reduce influence of the vibration of transducer to 3D printing, the outside of transducer can be arranged transducer cover；Meanwhile
In order to cool to transducer, a fan can also be added in the afterbody of transducer.
The proportioning device includes connecting rod 451, left plate 452 and right panel 453；Described connecting rod one end is arranged on the second bottom
In the cavity 441 of seat 44, the other end stretches out the cavity and is connected by the first connecting plate with the ultrasonic system so that described
Proportioning device and the ultrasonic system being capable of synchronizing movings；The connecting rod, which is arranged on one end in cavity and set up separately, is equipped with the first spiral shell
Line；The second base is arranged on the top of the first base；The left plate is arranged in the cavity, and with the connection
The end that bar is arranged on one end in cavity is fixed；The right panel correspond to the left plate be arranged in the cavity and the right panel with
Certain distance is provided between the left plate, forms demand chamber；The right panel is an inverted concave structure, the right panel set
It is located in the connecting rod, and the right panel is provided with away from the side of the left plate and matched with the first screw thread of the connecting rod
The second screw thread, by rotating the connecting rod right panel can be made to be moved along the connecting rod, so as to adjust the demand chamber
Fixing fabric structure material amount.
The second base is that upper surface is provided with barrel 42, and the outlet of the barrel is led in the cavity, described
The entrance top of barrel corresponds to the feeding mouth, and material is fallen into the barrel by feeding mouth；The lower section of the cavity is set
Have a passage 432 (passage herein can select slope or vertical in form can, but consider actual production manufacturing process
The difficulty of processing on middle slope is larger and precision is not easy to ensure, preferred vertical passage), the both ends of the passage connect the sky respectively
Chamber and the horizontal channel；The passage is set close to the horizontal channel first end.
The drive system uses ball-screw-transmission, and the drive system includes being fixed on first workbench
Driving guide groove 461 and along driving guide groove movement driving slide unit 462；The transducer by the 3rd L-shaped connecting plate 463 with
The driving slide unit connection, the top of the 3rd L-shaped connecting plate are set at the stationary point of the transducer that (i.e. amplitude is zero
Place), bottom is connected with the driving slide unit so that can drives ultrasound while the driving slide unit forward slip of drive system
System is advanced.Proportioning device is arranged on the position of ultrasonic vibration system stationary point (amplitude of ultrasonic vibration 0) with drive system so that
Proportioning device can not be influenceed smooth working with drive system by ultrasonic vibration.
Proportioning device is provided in second base in Fig. 5, and the level that passage and tool heads are provided in first base is led to
In road, therefore in order to clearly show that the connection of proportioning device, tool heads and passage and structure, first base and second base are entered
Go to erect and cutd open, that is, removed the outboard structure of first base and second base, expose proportioning device, tool heads and passage.
Printhead base, first base and second base are carried out erecting in Fig. 6 to cut open, with the structure inside display.
Print procedure with the 3D printing device in the present embodiment is as follows：
Early-stage preparations：Print parameters are determined according to the size of threedimensional model, complexity etc., then selected according to print parameters
The diameter of suitable printing nozzle is selected, the volume of material, rotates proportioning device according to needed for determining the flow of printing nozzle mouth
Connecting rod moves left and right proportioning device right panel to reach the volume of determination.
Reset：Reset print platform, print platform is located at peak in Z-direction, the center face printing of print platform
The printing nozzle of head unit.
Pan feeding：Granular plastic pellet (material PLA) is poured into barrel feeding mouth from the top of 3D printing device.
It is quantitative：Proportioning device takes the material A of certain volume amount to enter demand chamber, drive system work, the drive of drive system
The slow forward slip of dynamic slide unit, simultaneous quantitative device is with amplitude forward slip, and after sliding a segment distance, demand chamber is reached on passage
Side, material A are fallen into passage (because the tool heads that are simultaneously displaced in place of passage bottom are blocked, therefore a certain amount of material A heap
Product is in the bottom of passage).
Melting：Ultrasonic system moves forward with proportioning device, and tool heads are in the entrance close to spring needle valve type nozzle
Place stops, and then drive system motor snap back rotates, and ultrasonic system is moved with proportioning device reverse linear, when ultrasound is
System tool heads are when being moved to passage rear, and the material A for being deposited in passage originally is fully entered in the horizontal channel where tool heads；
Then ultrasonic system continues reverse linear movement with proportioning device, until demand chamber moves to the lower section of cartridge outlet.
Then proportioning device measures same amount of material B.Then ultrasonic system and proportioning device start slowly to repeat to
Preceding movement, after sliding a segment distance, demand chamber is reached above passage, and material B is deposited in the bottom of passage.Tool heads promote material
A is continued to move along, and is compacted material A.Material A Flashmelt under the collective effect of ultrasonic vibration and tool heads pressure.
Tool heads move on during melting, and the pressure in horizontal channel where tool heads constantly rises, when pressure reaches spring
During the Opening pressure of needle jet, material enters the bottom of printhead unit by the passage in spring needle valve type nozzle.Beat
There is heating coil heat transfer outside print head unit, make material keeping temperature.
Printing：Asynchronous motor drives eccentric mechanism to rotate by one-stage gear speed increasing mechanism (big little gear).
The rotary motion of eccentric mechanism makes connecting rod be moved up and down with piston in the hole of printhead base.Moved downward in piston
When, the effect that piston tip imposes reinforcing to the fused materials A of printhead unit makes material finally with the fused mass of one one
The form of pellet is expelled on print platform.
3D printing platform moves：Being moved simultaneously to module according to the order XY of printing makes current printing point be placed exactly in printing
The underface of shower nozzle, after the completion of the layer A printings of threedimensional model, the linear module work of Z-direction drives print platform to move down, accurate
Next layer of B of standby printing.
In the present embodiment, the work period of printhead unit is 1s, i.e., printhead unit is per second prints a melting
Material ball is on print platform；The work period of material melts unit is 1min (comprising process and backhaul), i.e. material melts list
Member is per minute to convey a material into printhead unit, and the volume of these materials was just equal to printing nozzle in one minute
Discharge volume, i.e., the quantitative volume of material of proportioning device is printing nozzle discharging volume per minute.
Therefore, whole device can continuously work, and the printing nozzle of printhead unit can discharge incessantly.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (9)
- A kind of 1. ultrasonic plastifying fusion deposition modeling 3D printing device, it is characterised in that including support (1), print unit (2), Printhead unit (3) and material melts unit (4)；The support includes the first workbench (11) and the second workbench (12) setting up and down, first workbench Printhead unit and the material melts unit is provided with, the print unit is provided with second workbench；The material melts unit includes ultrasonic system (41), proportioning device (45) and drive system (46), the quantitative dress Put including connecting rod (451), left plate (452) and right panel (453)；Described connecting rod one end is arranged in the cavitys (441) of second base (44), and the other end stretches out the cavity and by the One connecting plate (414) is connected with the ultrasonic system so that the proportioning device and the ultrasonic system being capable of synchronizing movings；The left plate is arranged in the cavity, and the one end being arranged on the connecting rod in cavity is fixed；The right panel pair Answer the left plate to be arranged in the cavity and be provided with certain distance between the right panel and the left plate；The right panel is arranged It can move in the connecting rod and along the connecting rod, so as to adjust the control thing of the spacing between the right panel and the left plate The amount of material；The ultrasonic system is used for fused materials；The drive system is used to drive the ultrasonic system to move forward and backward, so that Obtain ultrasonic system and melt the material that the proportioning device measures；The printhead unit is used to the material of melting being delivered to printing Unit is printed.
- 2. a kind of ultrasonic plastifying fusion deposition modeling 3D printing device according to claim 1, it is characterised in that described super Sound system includes tool heads (411), ultrasonic transformer (412) and the transducer (413) being sequentially connected, the first end of the tool heads Stretch into the second end of the horizontal channel (431) for being arranged on first base (43), the second end of the tool heads passes through ultrasonic transformer (412) it is connected with the transducer (413)；The first base is fixed on the first workbench, and is arranged at described second The lower section of base；The size of the horizontal channel matches with the tool heads so that the tool heads can be in the horizontal channel It is interior movable；Interface channel is connected with the outside of the first end of the horizontal channel, the interface channel connects the printhead Unit so that the material melted by ultrasonic system can enter the printhead unit by the interface channel.
- A kind of 3. ultrasonic plastifying fusion deposition modeling 3D printing device according to claim 2, it is characterised in that the company Connect road and use spring needle valve type nozzle (47), and the opening of the spring needle valve type nozzle is towards the printhead unit.
- 4. a kind of ultrasonic plastifying fusion deposition modeling 3D printing device according to claim 2, it is characterised in that described The upper surface of two bases is provided with barrel (42), and the outlet of the barrel is led in the cavity；The lower section of the cavity is set There is a passage (432), the both ends of the passage connect the cavity and the horizontal channel respectively；The passage (432) is leaned on The first end of the nearly horizontal channel (431) is set.
- A kind of 5. ultrasonic plastifying fusion deposition modeling 3D printing device according to claim 2, it is characterised in that the drive Dynamic system use ball-screw-transmission, the drive system including the driving guide groove (461) that is arranged on the first workbench with And the driving slide unit (462) along driving guide groove movement；The transducer is slided by the 3rd L-shaped connecting plate (463) and the driving Platform is connected, and the riser of the 3rd L-shaped connecting plate is set at the stationary point of the transducer, and its transverse slat connects with the driving slide unit Connect so that can drives ultrasonic system to advance while the driving slide unit forward slip of drive system.
- 6. a kind of ultrasonic plastifying fusion deposition modeling 3D printing device according to claim 2, it is characterised in that described to beat Print head unit includes speed increasing mechanism and toggle, and the speed increasing mechanism is used to provide the dynamic of crank and connecting rod movement Power；Motor (32), shaft coupling (33), gear wheel (34) and the little gear (35) that the speed increasing mechanism includes, the motor installation On motor cabinet (36)；The both ends of the shaft coupling are connected with the motor and the gear wheel respectively, the gear wheel and institute Little gear engagement is stated, shaft coupling described in the motor driven rotates, and the bull gear drive is further driven to, so as to drive small tooth Wheel rotates；The toggle includes two eccentric mechanisms (37), connecting rod (38) and piston (39), two eccentric mechanisms Connect and be separately fixed on the madial wall of printhead base (31) by connector mutually, one of them described eccentric mechanism with The little gear connection, the rotation of the little gear drive two eccentric mechanisms to rotate；The connecting rod be arranged on two it is described partially On connector between innermost being handle, the connecting rod can move up and down with the rotation of the eccentric mechanism；The top of the piston It is connected with the lower end of the connecting rod, the lower end of the piston is cone tip shape, and the piston can be with the connecting rod in printhead base Duct in move up and down so that the piston can extrude the material of the melting of internal piston；In the side wall of the piston also A short tube (391) is provided with, the short tube connects the interface channel and the piston.
- 7. a kind of ultrasonic plastifying fusion deposition modeling 3D printing device according to claim 6, it is characterised in that described to beat A printing nozzle (311) is additionally provided with below print head base, the printing nozzle and the printhead base are detachable Connection, is conveniently replaceable the printing nozzle；The printing nozzle is led in the lower end of the piston.
- 8. a kind of ultrasonic plastifying fusion deposition modeling 3D printing device according to claim 6, it is characterised in that described to beat The lower outside of print head base is additionally provided with heating coil (30), and the heating coil is used for the temperature for keeping material, prevents thing Material is rotten.
- 9. a kind of ultrasonic plastifying fusion deposition modeling 3D printing device according to claim 1, it is characterised in that described to beat Impression member includes print platform (21), X to module (22), Y-direction module (23) and Z-direction module (24), and the X is to module, Y-direction Module and Z-direction module use ball-screw-transmission, and the print unit comprises at least one group of X to module；The X is set including X of the X to guide groove (221) and along X to guide groove movement to module to slide unit (222), the X to guide groove Put on second workbench；On second workbench chute (26) is arranged with parallel with the X to guide groove, First roller (27) along the runner movement, upper surface and the X of first roller are provided with the chute It is located at same level to the upper surface of slide unit；The Y-direction module includes Y-direction guide groove (231) and the Y-direction slide unit (232) along Y-direction guide groove movement；The X to sliding group and Using the first L-shaped connecting plate (25) connection being vertically arranged, the transverse slat one of the first L-shaped connecting plate between the Y-direction module End is arranged on upper surfaces of the X to slide unit, and the other end is arranged on the upper surface of first roller, and the Y-direction guide groove is arranged on institute On the riser for stating the first L-shaped connecting plate；The Z-direction module includes Z-direction guide groove (241) and the Z-direction slide unit (242) along Z-direction guide groove movement, the Z-direction guide groove The back side be directly or indirectly connected with the Y-direction slide unit；The print platform is connected by the second L-shaped connecting plate with the Z-direction slide unit, and the second L-shaped connecting plate is arranged on institute State the lower section of print platform.
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| CN201710935050.2A CN107498854B (en) | 2017-10-10 | 2017-10-10 | Ultrasonic plasticizing fused deposition modeling 3D printing device |
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