CN107031040B - A kind of 3 D-printing device - Google Patents

A kind of 3 D-printing device Download PDF

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Publication number
CN107031040B
CN107031040B CN201710399616.4A CN201710399616A CN107031040B CN 107031040 B CN107031040 B CN 107031040B CN 201710399616 A CN201710399616 A CN 201710399616A CN 107031040 B CN107031040 B CN 107031040B
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CN
China
Prior art keywords
printing
walking mechanism
vertical
objective table
walking
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Expired - Fee Related
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CN201710399616.4A
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Chinese (zh)
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CN107031040A (en
Inventor
徐敬华
李俊涛
张树有
谭建荣
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Zhejiang University ZJU
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Zhejiang University ZJU
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Priority to CN201710399616.4A priority Critical patent/CN107031040B/en
Priority to CN201811378094.0A priority patent/CN109334001B/en
Publication of CN107031040A publication Critical patent/CN107031040A/en
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Publication of CN107031040B publication Critical patent/CN107031040B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE 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
    • B33Y30/00Apparatus for additive manufacturing; Details thereof or accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20Apparatus for additive manufacturing; Details thereof or accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30Auxiliary operations or equipment
    • B29C64/386Data acquisition or data processing for additive manufacturing
    • B29C64/393Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE 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
    • B33Y50/00Data acquisition or data processing for additive manufacturing
    • B33Y50/02Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)

Abstract

The present invention relates to a kind of 3 D-printing devices, belong to rapid shaping technique field.The device includes rack and rack-mounted controller, print head, objective table and walking mechanism, and controller includes memory and processor;Walking mechanism includes first walking mechanism and the second walking mechanism, and it is mobile that first walking mechanism drives print head relative to rack to do three-dimensional space with being controlled by the controller, and the second walking mechanism ground driving objective table that is controlled by the controller at least does vertical movement.By the way that print head and objective table are all configured to expand the scope of application of 3 D-printing technique while improving print quality in the structure moved up of hanging down.

Description

A kind of 3 D-printing device
Technical field
The present invention relates to rapid shaping technique fields, specifically, being related to a kind of 3 D-printing device.
Background technique
3 D-printing device is a kind of mathematical model based on three-dimensional objects, using materials such as shaping silks, by successively beating The equipment that the mode of print constructs three-dimension object.
As shown in Figure 1, be a kind of 3 D-printing device for supplying moulding material to print head 05 in the form of shaping silk, It is wound with shaping silk 03 on reel 02, which is installed to the shaft 01 of the reel mounting rack of 3 D-printing device, from And it can realize and shaping silk 03 is supplied to print head 05.In use, shaping silk 03 is pulled out from reel 02, makes to be drawn Straight shaping silk is the flexible conduit 04 made of frictional resistance lesser material, until supplying shaping silk to print head 05 The feeding driving wheel 053 and feeding driven wheel 054 driven by motor 055, in feeding driving wheel 053 and feeding driven wheel 054 Clamp under driving, shaping silk 03 enters electric heater 051, shaping silk in the electric heater 051, it is heated at molten condition at Profile material squeezes out from the printing nozzle 052 for being set to 051 end of electric heater under the promotion of subsequent forming silk and is deposited on objective table On 06;The controller of the 3 D-printing device is moved in horizontal X-Y plane by control print head 05, while controlling loading Platform 06 is moved in vertical Z-direction, prints predetermined three-dimensional object with layer-by-layer.
Since print head can only move in horizontal X-Y plane, objective table can only be mobile in Z-direction, usually can be fine Printing is completed on ground, but spacing is special between expanding the two after needing to repeat to shorten the spacing between objective table and printing nozzle again In the case of, hysterisis error can be generated in the leading screw and nut mechanism of vertical movement for driving objective table, and objective table quality with The progress of print progress and be continuously increased, cause its hysterisis error to be difficult to determine and be difficult to be compensated well, which has limited The scope of application of 3 D-printing device.In addition, usually using high-grade screw rod in order to reduce hysterisis error as far as possible, not only pushing away The high cost of 3 D-printing device, and hysterisis error determination and compensation problem still exist.
Summary of the invention
The object of the present invention is to provide a kind of 3 D-printing devices, to expand the scope of application of 3 D-printing device.
To achieve the goals above, 3 D-printing device provided by the invention includes rack and rack-mounted control Device, print head, objective table and walking mechanism, print head include printing nozzle, and controller includes memory and processor;Vehicle with walking machine Structure includes first walking mechanism and the second walking mechanism, and first walking mechanism drives printing nozzle with respect to machine with being controlled by the controller It is mobile that frame does three-dimensional space, and the second walking mechanism ground driving objective table that is controlled by the controller at least does vertical movement.
By the way that be all configured to print head and objective table can be in the structure that moves up of hanging down, to make full use of print head to exist The characteristic that quality is kept approximately constant in print procedure can well miss screw rod backhaul in vertical upper repetition moving process Difference is controlled and is compensated, at this point, carrying out the difference that disappears using empirical value, is beaten with while improving print quality, expanding three-dimensional The printable range that printing equipment is set, i.e. its adaptation range.In addition, bigger to the range of choice of the grade of used screw rod.
Specific scheme is to be equipped with by printing nozzle side for measuring from the red of printing nozzle extrusion molding material temperature Outer thermal detector, memory are stored with computer program, following steps are able to achieve when computer program is executed by processor: based on survey The material parameter of the temperature and shaping silk used that obtain, judges the flow morphology of printing nozzle extrusion molding material.To different materials Material type, the extrusion state of different batches shaping silk are monitored, convenient for adjusting the ginseng such as print speed, temperature according to actual needs Number, further increases print quality.
More specific scheme is if fluidised form, and after completing to the printing of current slice layer, the second walking mechanism of control is driven Dynamic object stage moves down the thickness that will print slicing layer;If on-fluent, after completing to the printing of current slice layer, control First walking mechanism driving printing nozzle processed moves up the thickness that will print slicing layer.To be beaten according to actual needs Print is prevented from being moved when fluidised form using printing nozzle and is turned up and is easy to appear silk and is thrown out of printing nozzle and influences print quality Problem.
Another more specific scheme is that control first walking mechanism drives printing nozzle to print according to predetermined run trace Slicing layer, printing nozzle are higher than extrusion molding along the walking acceleration of predetermined run trace when extrusion molding material is on-fluent Walking acceleration when material is fluidised form.It is excessive to prevent walking acceleration and will be thrown away in the moulding material of fluidised form, there is part It accumulates and local the problem of lacking material, further increases print quality.
Another specific scheme is that the second walking mechanism is controlled by the controller that do three-dimensional space mobile for ground driving objective table, Memory is stored with computer program, and following steps are able to achieve when computer program is executed by processor: in printing slicing layer When the smooth part of surface, control objective table is remain stationary, and is controlled first walking mechanism driving printing nozzle movement and printed Surface smooth part;When printing the inside fill part of slicing layer, control printing nozzle is remain stationary, and controls the second walking Mechanism driving objective table is mobile and prints internal fill part.When printing internal fill part to can be effectively prevented, Occur moulding material when the smooth part adjoiner deflecting of surface to be thrown out of the problem of influencing print quality or limit printing speed The raising of degree can improve print speed under the premise of ensuring print quality.
Another specific scheme is that the second walking mechanism is controlled by the controller that do three-dimensional space mobile for ground driving objective table, Memory is stored with computer program, and following steps are able to achieve when computer program is executed by processor: when printing slicing layer, If printing nozzle is more than preset threshold according to the peak of the walking acceleration of a continuous predetermined run trace, second is controlled Walking mechanism driving objective table is mobile according to the mirror image track of predetermined run trace, and controls printing nozzle and squeeze according to set rate Moulding material is printed out, and otherwise, control first walking mechanism driving printing nozzle is printed according to predetermined run trace. Print quality can be improved under conditions of ensuring continuously to print.
Preferred scheme be print head include electric heater, set on the end of electric heater printing nozzle and pass through conduit To the feeding unit of electric heater conveying shaping silk, electric heater is mounted in first walking mechanism, and feeding unit is mounted on machine On frame;Feeding unit includes feeding driving wheel, feeding driven wheel and power device, and power device includes driving motor, is driven Motor-driven small-diameter gear and large diameter gear with tooth engagement in small-diameter gear, large diameter gear and feeding capstan drive connect It connects.Material conveying is effectively reduced in the identical condition of rotating ratio with deceleration mechanism as transmission by using internal tooth engaging mechanism Volume.
Preferred scheme is that feeding unit is securedly mounted in rack by a statically determinate beam.
Another preferred scheme is that the second walking mechanism includes four vertical guide rods, two vertical screw rods and vertical driving Motor, four vertical guide rods are matched with the guide hole in the four right angles portion for being located at objective table, two vertical screw rods be fixed on Opposite two supermedial nuts in edge part mutually screw, and vertical driving motor drives two vertical screw rod is synchronous to turn by synchronous belt It is dynamic.Four support guide points are constituted by four guide rods, more and stable structure is constrained, effectively ensures that and moved down on driving objective table The verticality of dynamic process, strength of adjustment.
Another preferred scheme is that first walking mechanism includes walker, two vertical guide rods, two vertical screw rods, two Root cross lead screw, two lateral nuts screwed with the cross lead screw, two longitudinal screw mandrels and two screw with longitudinal screw mandrel Longitudinal nut;Walker includes support frame, Der Laengslenker, lateral guide rod and orthogonal sliding block, and orthogonal sliding block is equipped with and longitudinal direction The longitudinal guide hole and the lateral guide hole matched with lateral guide rod, printing nozzle that guide rod matches are mounted on orthogonal sliding block;Branch The right angle portion on support two total sides is equipped with the guide hole matched with vertical guide rod, is installed in the right angle portion on other two total side The nut mutually screwed with vertical screw rod, fixed vertical driving motor on the rack drive two vertical screw rods same by synchronous belt Step rotation;Two cross lead screws are installed in rotation on a pair of of opposed edge portions of support frame, and two longitudinal screw mandrels can be rotated Ground is mounted on another pair opposed edge portions of support frame;The both ends of Der Laengslenker are fixedly connected with lateral nut respectively, laterally The both ends of guide rod are fixedly connected with longitudinal nut respectively, and fixed horizontal drive motor on the support frame passes through synchronous belt driving two Root cross lead screw rotates synchronously, and fixed vertical drive motor on the support frame drives two longitudinal screw mandrels synchronous by synchronous belt Rotation.Overall structure is stablized, and printing nozzle can be driven to do three-dimensional space movement well, i.e. X-Y-Z three-dimensional is mobile.
Detailed description of the invention
Fig. 1 is a kind of existing structural schematic diagram of 3 D-printing device;
Fig. 2 is the structural schematic diagram of 3 D-printing device in the embodiment of the present invention 1;
Fig. 3 is the side view of 3 D-printing device in the embodiment of the present invention 1;
Fig. 4 is the structural schematic diagram of electric heater, printing nozzle and orthogonal sliding block in the embodiment of the present invention 1;
Fig. 5 is the structural schematic diagram of feeding unit in the embodiment of the present invention 1;
Fig. 6 is the structural exploded view of feeding unit in the embodiment of the present invention 1;
Fig. 7 is the predetermined walking track schematic diagram of the printing nozzle when printing slicing layer of the embodiment of the present invention 2.
Specific embodiment
With reference to embodiments and its attached drawing the invention will be further described.
Embodiment 1
Referring to fig. 2 and Fig. 3, this 3 D-printing device 1 include rack 20 and the controller being mounted in the rack 20, printing Head, objective table 21, first walking mechanism and the second walking mechanism.Controller includes memory and processor, first walking mechanism The walking mechanism in the present embodiment is constituted together with the second walking mechanism.
Referring to fig. 2, Fig. 3 and Fig. 4, print head include electric heater 31, the printing nozzle set on the end of electric heater 31 32 and the feeding unit 4 of shaping silk is conveyed to electric heater 31 by conduit 33, feeding unit 4 is fastened by statically determinate beam 22 It is mounted on the side side of rack 20.
The infrared temperature measurement device 23 of moulding material temperature for measuring its extrusion is installed by the side of printing nozzle 32, It is thermal imaging system in the present embodiment, parameter: quiescent current is 65 μ A, and wavelength pass band is 5.5 μm to 14 μm, can measure temperature model Enclose is -70 DEG C to 380 DEG C.
As shown in Figures 2 and 3, first walking mechanism drives printing nozzle 32 and electric heater 31 1 with being controlled by the controller It rises and does three-dimensional space movement, including walker, four vertical guide rod 51, two vertical screw rod 52, vertical driving motor 53, two Cross lead screw 54, two lateral nuts 55 screwed with cross lead screw 54, horizontal drive motor 56, two longitudinal screw mandrels 57, two A longitudinal nut 58 and vertical drive motor 59 screwed with longitudinal screw mandrel 57.Cross lead screw 54 and longitudinal screw mandrel 57 are located at two In horizontal plane, and the two is axially mutually orthogonal, i.e., two screw rods and vertical screw rod 52 constitute knot mutually orthogonal two-by-two together Structure, the orthogonal coordinate system X-Z-Y corresponding to diagram.
Walker includes that support frame 61, Der Laengslenker 62, lateral guide rod 63 and orthogonal sliding block 64, orthogonal sliding block 64 are equipped with The longitudinal guide hole 641 matched with Der Laengslenker 62 and the lateral guide hole 642 matched with lateral guide rod 63, electric heater 32 are pacified It is mobile so as to do three-dimensional space with orthogonal sliding block 64 mounted in the lower section of orthogonal sliding block 64.
The support frame 61 two right angle portions for being total to widthwise edge and the middle part of longitudinal edge are equipped with and match with vertical guide rod 51 Guide hole, be installed with the nut screwed with vertical 52 phase of screw rod in the right angle portion of other two total widthwise edge, be installed in rack 20 On 53 motor of vertical driving drive two vertical screw rod 51 to rotate synchronously by synchronous belt 65, so that support frame 61 be driven to hang down It moves up, then drives printing nozzle 32 to move up vertical by orthogonal sliding block 64.
Two cross lead screws 54 are installed in rotation on respectively on a pair of of opposing lateral sides edge of support frame 61, i.e., each A cross lead screw 54 is rotatably mounted on lateral edge portion, two longitudinal screw mandrels 54 are installed in rotation on support frame 61 Another pair opposite longitudinal sides edge on, i.e., longitudinally in each edge part rotationally on a cross lead screw 54 is installed.
The both ends of Der Laengslenker 62 are fixedly connected with lateral nut 55 respectively, the both ends of lateral guide rod 63 respectively with longitudinal spiral shell Mother 58 is fixedly connected, and the horizontal drive motor 56 being installed on support frame 61 drives two cross lead screws 54 same by synchronous belt 66 Step rotation, the vertical drive motor 59 being installed on support frame 61 drive two longitudinal screw mandrels 57 are synchronous to turn by synchronous belt 67 It is dynamic.
By the coordinated driving of three driving motors, to drive printing nozzle 32 with respect to machine by orthogonal sliding block 64 It is mobile that frame 20 does three-dimensional space.
As shown in Figures 2 and 3, the second walking mechanism includes four vertical 71, two vertical screw rods 72 of guide rod and vertical drive Dynamic motor 73, four vertical guide rod 71 are matched with the guide hole in the four right angles portion for being located at objective table, two vertical screw rod 72 It is mutually screwed with the supermedial nut for being fixed on opposite two edge parts, vertical driving motor 73 drives two by synchronous belt 74 Vertical screw rod 72 rotates synchronously.So as to driving objective table 21 in vertical upper reciprocating movement.
Referring to Fig. 5 and Fig. 6, feeding unit 4 includes feeding driving wheel 41, feeding driven wheel 42 and power device, power dress It sets including driving motor 43, be driven the small-diameter gear 44 of the driving of motor 43 and the large diameter gear with tooth engagement in small-diameter gear 44 45, large diameter gear 45 is fixed on turntable 46, and turntable 46 is fixedly connected by fixture nut 47 with transmission shaft 48, feeding driving wheel 41 are fixedly connected with transmission shaft 48, i.e., large diameter gear 45 and feeding driving wheel 41 are sequentially connected by turntable 46, transmission shaft 48.From And the logical driving for driving motor 43, feeding driving wheel 41 and feeding driven wheel 42 squeeze the shaping silk 49 between the two and will Its heating melting for being delivered to electric heater 31 is intracavitary.Two internal tooth meshed gears centers away from for 38mm, small-diameter gear 44 The number of teeth is 10, modulus 1, tip diameter 12.82mm, root diameter 8.32mm, modification coefficient are 0.412 and reference circle is straight Diameter 10mm.The interior number of teeth of large diameter gear 45 is 86, modulus 1, tip diameter 84.82mm, root diameter 89.32mm, becomes Potential coefficient is -0.412 and reference diameter 86mm.The two transmission ratio is 1:8.6, registration 1.51.According to same transmission ratio External gear pump transmission mechanism volume be 23106.27mm3, and the volume of this inside engaged gear transmission mechanism is 20214.54mm3, the two compares, and volume reduces 2891.73mm3
The electric heater 32 that arrangement can be seen that print head from the above is mounted in first walking mechanism, and feeding Unit 4 is mounted in rack 21, separately positioned by carrying out the two, to reduce the matter for being located at part in first walking mechanism Amount so as to reduce the vibration in walking accelerator, and will be driven with reducing their quality in print procedure, i.e. inertia The vibration of dynamic motor 43 is isolated with printing nozzle 32.
It is printed using this 3 D-printing device, to control electric heater 31, feeding unit 4, the by controller The movement of one walking mechanism, the second walking mechanism is sliced to print every layer of three-dimension object layer by layer on objective table 21 Layer, is summed into three-dimension object corresponding with three-dimensional digital model.
In the present embodiment, controller includes memory and processor, is stored with computer program in memory.
The first print control program: the computer program is able to achieve following steps when being executed by processor:
It receives infrared temperature measurement device 23 the moulding material temperature squeezed out from printing nozzle 32 is carried out detecting acquired temperature Data, the material parameter based on the temperature data and shaping silk used (based on acquisition on filament cassette chip or can be packed into silk Think to be inputted by touch screen when box), judge the flow morphology of the moulding material squeezed out from printing nozzle 32;
If the moulding material squeezed out is judged as fluidised form, after completing to the printing of current slice layer, the second row is controlled It walks mechanism driving objective table 21 and moves down the thickness that will print slicing layer, to continue the slicing layer that printing will print;
If the moulding material squeezed out is judged as on-fluent, after completing to the printing of current slice layer, control first Walking mechanism drives the printing nozzle 32 to move up the thickness that will print slicing layer, with continue printing will print cut Lamella.
In the present embodiment, when so-called " slicing layer " is modeling, three-dimensional object model is cut into vertical by several layers The layer of uniform thickness or not uniform thickness is formed by stacking, and when printing, is printed according to the shape of slicing layer is layer-by-layer, and be summed into target three-dimensional Object.
It according to the judgement of the flow morphology of moulding material is realized using reducing objective table 21 or increasing printing nozzle 32 The switching of different slicing layers makes full use of the quality of print head to maintain stable spy to be not easy to be thrown out of when for on-fluent Point realizes switching using the method for improving printing nozzle, to improve the precision of adjustment;And in fluidised form, utilize reduction objective table The switching for realizing slicing layer, can effectively prevent moulding material to be thrown out of and influence print quality, according to the property of printed material The pros and cons under different situations are weighed, to improve print quality.
Second of print control program: the computer program is able to achieve following steps when being executed by processor:
It receives infrared temperature measurement device 23 the moulding material temperature squeezed out from printing nozzle 32 is carried out detecting acquired temperature Data, the material parameter based on the temperature data and shaping silk used (based on acquisition on filament cassette chip or can be packed into silk Think to be inputted by touch screen when box), judge the flow morphology of the moulding material squeezed out from printing nozzle 32;
When printing same layer slice, control first walking mechanism driving printing nozzle 32 is printed according to predetermined run trace Slicing layer, print head, which is higher than when extrusion molding material is on-fluent along the walking acceleration of predetermined run trace, is extruded into profile Walking acceleration when material is fluidised form.It is not easy to be thrown out of and improve walking acceleration when moulding material is on-fluent, and Fluidised form is easy to be thrown out of, and reduces walking acceleration, i.e., reduces printing by tradeoff print speed and the moulding material amount of being thrown out of Two problems of quality improve print speed under the premise of ensuring print quality as far as possible.
Embodiment 2
As the explanation to the embodiment of the present invention 2, only the difference with above-described embodiment 1 is illustrated below.
The structure of second walking mechanism and the structure of first walking mechanism are similar, that is, are additionally arranged support frame, and originally directly The vertical guide rod that is connected on objective table and vertical screw rod are connected on the support frame, and objective table by can along the horizontal plane in two Dimension mobile mechanism connect with support frame, the structure of the two-dimensional movement mechanism and sliding block orthogonal in first walking mechanism, cross lead screw, Lateral guide rod, lateral nut, horizontal drive motor, longitudinal screw mandrel, Der Laengslenker and longitudinal nut composition structure are the same, only carry Object platform is installed in the top of orthogonal sliding block.
It is primarily to solve following problems existing in the prior art: referring to shown in Fig. 1 and Fig. 7, due to print head 05 is integrated with electric heater 051, printing nozzle 052, motor 055, feed roller 053 and feed roller 054, quality it is larger and Possess biggish inertia, cause its response sensitivity relatively low, to easily cause no small amplitude in speed-change process, speed change and Amplitude, which will lead to, to be thrown away from printing nozzle 052 in the moulding material of molten condition and asking for locally-shaped material stacking occurs Topic especially when printing slicing layer 07 as shown in Figure 7, first prints at a slow speed the surface of object using high-precision filament Smooth part 071 then quickly uses low precision for internal fill part 072 so that the body surface printed is smooth, fine and closely woven Crin be filled, wherein the called torulopsis of surface smooth part 071 be for the appearance of internal fill part, To improve print speed;In addition, in order to ensure printing the structural strength of three-dimension object, internal fill part is often printed as longitude and latitude Line pilotaxitic texture, meaning will realize the turning of 180 degree in boundary, crin are easy to cause to be filled with part 072 and surface 71 junction of smooth part is got rid of to accumulating in printed surface smooth part 071, reduces surface smoothness, simultaneously The structure bonding strength between internal fill part 071 and surface smooth part 071 is reduced, also in order to avoid there is aforementioned quality Problem need to slowly accelerate after boundary turns and slowly slows down, again to limit further increasing for print speed.
And the present embodiment executes computer journey stored in memory by processor by being based on improved structure Sequence is, it can be achieved that following steps, to solve the technical problem:
When printing the surface smooth part 071 of slicing layer, control objective table is remain stationary, and controls first walking mechanism Driving print head is mobile and prints surface smooth part 071;
When printing the inside fill part 072 of slicing layer, control print head is remain stationary, and controls the second walking mechanism It drives objective table movement and prints internal fill part 072.
That is, printing surface smooth part 071 using print head movement, recycles the movement of objective table to print inside and fill out Part 072 is filled, to avoid in big walking acceleration, moulding material is thrown away from printing nozzle and is accumulated to surface smooth department Divide upper and influences printout surface quality and structural strength.
Further, it is also possible to execute computer program stored in memory by processor, following steps are realized, thus Improve print quality:
When printing same layer slicing layer, if print head is according to the highest of the walking acceleration of a continuous predetermined run trace Value is more than preset threshold, then controls the second walking mechanism driving objective table according to the mirror image track movement of predetermined run trace, and Control print head is printed according to set rate extrusion molding material, and otherwise, control first walking mechanism driving print head is pressed It is printed according to predetermined run trace.So as to improve print speed under the premise of ensuring print quality.
In the above-described embodiments, " moulding material is fluidised form " refers in the temperature for measuring moulding material, in the temperature Under the conditions of be fluidised form;" shaping silk is on-fluent " refers in the temperature for measuring moulding material, under the conditions of the temperature, from beating The moulding material that print nozzle squeezes out is plastic state or part is plastic state and part is the state of fluidised form.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.

Claims (8)

1. a kind of 3 D-printing device, including rack and the controller being mounted on the rack, print head, objective table and walking Mechanism, the print head include printing nozzle, and the controller includes memory and processor;
It is characterized in that, the walking mechanism includes first walking mechanism and the second walking mechanism, the first walking mechanism by It is mobile that controller control ground drives the printing nozzle relative to the rack to do three-dimensional space, second walking mechanism by Controller control ground drives the objective table at least to do vertical movement;It is equipped with by the printing nozzle side for measuring The infrared temperature measurement device of extrusion molding material temperature, the memory are stored with computer program, and the computer program is described Processor is able to achieve following steps when executing:
Based on the material parameter of the temperature and shaping silk used that measure, the fluid for the moulding material that the printing nozzle squeezes out is judged Form;
If fluidised form, after completing to the printing of current slice layer, control second walking mechanism drive the objective table to Lower movement will print the thickness of slicing layer;
If on-fluent, after completing to the printing of current slice layer, controls the first walking mechanism and drive the printing spray Mouth moves up the thickness that will print slicing layer.
2. 3 D-printing device according to claim 1, it is characterised in that:
When printing same layer slicing layer, controls the first walking mechanism and drive the printing nozzle according to predetermined run trace Slicing layer is printed, the printing nozzle is when extrusion molding material is on-fluent along the walking acceleration of the predetermined run trace Higher than extrusion molding material be fluidised form when walking acceleration.
3. 3 D-printing device according to claim 1, which is characterized in that second walking mechanism is by the controller Control ground drives the objective table to do, and three-dimensional space is mobile, and the computer program is able to achieve following when being executed by the processor Step:
When printing the surface smooth part of slicing layer, controls the objective table and remain stationary, and control first vehicle with walking machine Structure drives the printing nozzle mobile and prints the surface smooth part;
It when printing the inside fill part of slicing layer, controls the printing nozzle and remain stationary, and control second walking Mechanism drives the objective table mobile and prints the internal fill part.
4. 3 D-printing device according to claim 1, which is characterized in that second walking mechanism is by the controller Control ground drives the objective table to do, and three-dimensional space is mobile, and the computer program is able to achieve following when being executed by the processor Step:
When printing slicing layer, if printing nozzle is more than according to the peak of the walking acceleration of a continuous predetermined run trace Preset threshold then controls second walking mechanism and the objective table is driven to move according to the mirror image track of the predetermined run trace It is dynamic, and control the printing nozzle and printed according to set rate extrusion molding material, otherwise, control first vehicle with walking machine Structure drives the printing nozzle to be printed according to the predetermined run trace.
5. according to claim 1 to 3 D-printing device described in any one of 4 claims, it is characterised in that:
The print head includes electric heater and conveys the feeding unit of shaping silk to the electric heater by conduit, described to beat The end that nozzle is set to the electric heater is printed, the electric heater is mounted in the first walking mechanism, the feeding list Member is mounted on the rack;
The feeding unit includes feeding driving wheel, feeding driven wheel and power device, the power device include driving motor, The small-diameter gear and large diameter gear with tooth engagement in the small-diameter gear driven by the driving motor, the large diameter gear with The feeding capstan drive connection.
6. 3 D-printing device according to claim 5, it is characterised in that:
The feeding unit is securedly mounted in the rack by a statically determinate beam.
7. according to claim 1 to 3 D-printing device described in any one of 4 claims, it is characterised in that:
Second walking mechanism includes four vertical guide rods, two vertical screw rods and vertical driving motor, four described vertical Guide rod is matched with the guide hole in the four right angles portion for being located at the objective table, two vertical screw rods be fixed on two phases The supermedial nut of edge part is mutually screwed, the vertical driving motor drives two vertical screw rods same by synchronous belt Step rotation.
8. according to claim 1 to 3 D-printing device described in any one of 4 claims, it is characterised in that:
The first walking mechanism includes walker, two vertical guide rods, two vertical screw rods, two cross lead screws, two with The lateral nut that the cross lead screw screws, two longitudinal screw mandrels and two longitudinal nuts screwed with the longitudinal screw mandrel;
The walker includes support frame, Der Laengslenker, lateral guide rod and orthogonal sliding block, the orthogonal sliding block be equipped with it is described The longitudinal guide hole and the lateral guide hole matched with the lateral guide rod, the printing nozzle that Der Laengslenker matches are mounted on institute It states on orthogonal sliding block;
The right angle portion on support frame as described above two total sides is equipped with the guide hole matched with the vertical guide rod, other two total side The nut mutually screwed with the vertical screw rod is installed in right angle portion, the vertical driving motor being installed in the rack passes through same Driving two vertical screw rods of step band rotate synchronously;
Two cross lead screws are installed in rotation on a pair of of opposed edge portions of support frame as described above, two longitudinal silks Bar is installed in rotation on another pair opposed edge portions of support frame as described above;
The both ends of the Der Laengslenker are fixedly connected with the lateral nut respectively, the both ends of the transverse direction guide rod respectively with it is described Longitudinal nut is fixedly connected, and the horizontal drive motor being installed on support frame as described above drives two transverse wires by synchronous belt Bar rotates synchronously, and the vertical drive motor being installed on support frame as described above drives two longitudinal screw mandrels synchronous by synchronous belt Rotation.
CN201710399616.4A 2017-05-31 2017-05-31 A kind of 3 D-printing device Expired - Fee Related CN107031040B (en)

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CN111231320A (en) * 2020-03-02 2020-06-05 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 Novel 3D print platform

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CN204109369U (en) * 2014-09-09 2015-01-21 合肥西锐三维打印科技有限公司 A kind of transmission mechanism of 3D printer
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CN104014794A (en) * 2014-05-30 2014-09-03 珠海天威飞马打印耗材有限公司 Three-dimensional printing method and machine
CN204109369U (en) * 2014-09-09 2015-01-21 合肥西锐三维打印科技有限公司 A kind of transmission mechanism of 3D printer
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