CN112157907B - Multi-nozzle high-speed 3D printing system - Google Patents
Multi-nozzle high-speed 3D printing system Download PDFInfo
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- CN112157907B CN112157907B CN202011144229.4A CN202011144229A CN112157907B CN 112157907 B CN112157907 B CN 112157907B CN 202011144229 A CN202011144229 A CN 202011144229A CN 112157907 B CN112157907 B CN 112157907B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive 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
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive 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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/209—Heads; Nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive 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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/227—Driving means
- B29C64/232—Driving means for motion along the axis orthogonal to the plane of a layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive 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
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/227—Driving means
- B29C64/236—Driving means for motion in a direction within the plane of a layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive 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
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive 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
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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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
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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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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- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
Abstract
The invention provides a multi-nozzle high-speed 3D printing system which comprises a support frame, wherein a Y-direction and Z-direction driving device is fixedly arranged on the support frame, an X-direction multi-nozzle printing device is movably arranged on the Y-direction and Z-direction driving device, and the X-direction multi-nozzle printing device is driven by a Y-direction synchronous belt driving device to reciprocate along a Y axis; the X-direction multi-nozzle printing device is provided with a plurality of X-direction guide rails, a plurality of nozzle trolleys are slidably mounted on the X-direction guide rails and are also provided with a plurality of X-direction synchronous belt driving devices, the number of the X-direction synchronous belt driving devices is the same as that of the nozzle trolleys, and the nozzle trolleys are fixedly connected with the X-direction synchronous belts of the X-direction synchronous belt driving devices so as to respectively drive one nozzle trolley to reciprocate from each X-direction synchronous belt driving device. Through setting up at a plurality of independent control's of X to many shower nozzles printing device shower nozzle dolly, can improve 3D printing speed by a wide margin, through calculating, whole printing speed promotes 2~7 times.
Description
Technical Field
The invention relates to the field of 3D printing of auxiliary medical instruments, in particular to a multi-nozzle 3D printing system.
Background
The 3D printing is widely applied as a forming technology of small-batch parts, and the 3D printing realizes the forming of the 3D parts by heating and spraying material wires through a spray head and stacking the material wires layer by layer. The existing 3D printing has the problem of long time consumption. In order to overcome the problem, a scheme of printing with multiple nozzles to shorten the printing time is proposed in the prior art, for example, a multi-nozzle device suitable for three-dimensional printer models with different structures is disclosed in chinese patent document CN 204820360U, and the multi-nozzle device adopts a mode that one transmission mechanism simultaneously drives more than two printing mechanisms to simultaneously and respectively print three-dimensional objects, thereby greatly saving the working time. CN108312523A has recorded a many shower nozzles 3D printer and has adopted the fixed dribbling of shower nozzle to take a plurality of shower nozzles designs to improve printing efficiency. However, in actual conditions, the distribution of printing tasks is not uniform, and a situation that only one nozzle is put into operation usually occurs, so that the improvement of printing efficiency is limited, and compared with the input cost, the cost performance is not high.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a multi-nozzle 3D printing system, which can greatly improve the 3D printing efficiency and the 3D printing speed, and in the preferred scheme, the printing precision can be ensured while the 3D printing speed is improved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a multi-nozzle high-speed 3D printing system comprises a support frame, wherein a Y-direction and Z-direction driving device is fixedly arranged on the support frame, an X-direction multi-nozzle printing device is movably arranged on the Y-direction and Z-direction driving device, and the X-direction multi-nozzle printing device is driven by a Y-direction synchronous belt driving device to reciprocate along a Y axis;
the X-direction multi-nozzle printing device is provided with a plurality of X-direction guide rails, a plurality of nozzle trolleys are slidably mounted on the X-direction guide rails and are also provided with a plurality of X-direction synchronous belt driving devices, the number of the X-direction synchronous belt driving devices is the same as that of the nozzle trolleys, and the nozzle trolleys are fixedly connected with the X-direction synchronous belts of the X-direction synchronous belt driving devices so as to respectively drive one nozzle trolley to reciprocate from each X-direction synchronous belt driving device.
In a preferred embodiment, the Y-direction and Z-direction driving device has a structure of:
the Z-direction support frame is fixedly connected with the support frame, and the workpiece platform is movably connected with the Z-direction support frame and driven by the Z-direction driving device to reciprocate up and down;
a Y-direction synchronous belt driving device and a Y-direction guide rail are arranged at the top of the Z-direction supporting frame,
and a Y-direction sliding groove is arranged at the bottom of the X-direction multi-nozzle printing device and is in sliding connection with the Y-direction guide rail, and a Y-direction synchronous belt of a Y-direction synchronous belt driving device is fixedly connected with the X-direction multi-nozzle printing device.
In a preferred embodiment, the Z-direction driving device has a structure comprising: and a rotatable Z-direction driving screw rod is arranged on the Z-direction supporting frame, the Z-direction driving screw rod is in threaded connection with the workpiece platform, and a Z-direction driving motor is fixedly connected with the Z-direction driving screw rod and drives the workpiece platform to reciprocate up and down through the Z-direction driving motor.
In a preferred scheme, the X-direction synchronous belt driving device is structurally characterized in that two synchronous belt wheels are arranged at two ends of an X-direction guide rail, an X-direction servo motor is connected with one of the synchronous belt wheels, and an X-direction synchronous belt bypasses the two synchronous belt wheels.
In the preferred scheme, the wire supply device is also arranged and is provided with a plurality of rotatable wire coiling disks, the number of the wire coiling disks is the same as that of the spray head trolley, and the wire supply device is also provided with a wire supply mechanism used for supplying material wires to the spray head trolley.
In a preferred scheme, the structure of the wire supply mechanism is as follows: the fixed seat is provided with a wire supply gear fixedly connected with a wire supply servo motor, the outer edge of the wire supply gear is provided with teeth, one side of the outer edge of the wire supply gear is also provided with a wire pressing wheel, the material wire is used for passing through the space between the wire supply gear and the wire pressing wheel, and the feeding of the material wire is controlled through the rotating speed of the servo motor.
In the preferred scheme, two wire supply nozzles for guiding the material wires are further arranged on the fixed seat, and the two wire supply nozzles are respectively positioned at the upstream and the downstream of the wire pressing wheel;
the wire pressing wheel is rotatably arranged on the adjusting plate, the fixing seat is provided with a guide hole and a screw hole, the adjusting plate is provided with a pressing guide rod and a pressing lead screw, the pressing guide rod is in sliding connection with the guide hole, the pressing lead screw is in threaded connection with the screw hole, the pressing lead screw is also connected with a pressing synchronous belt wheel, the adjusting plate is further provided with a pressing driving wheel, the pressing driving wheel is fixedly connected with a pressing motor, and the pressing synchronous belt bypasses the pressing synchronous belt wheel and the pressing driving wheel so as to adjust pressing force of the wire pressing wheel through the pressing motor.
In the preferred scheme, the structure of the spray head trolley is as follows: the nozzle seat plate is connected with the X-direction guide rail in a sliding mode through a sliding sleeve, a nozzle heating mechanism is fixedly arranged on the nozzle seat plate, a nozzle is arranged at the bottom of the nozzle heating mechanism, and the material wires penetrate into the nozzle through the nozzle heating mechanism.
In the preferred scheme, a turbine fan is also arranged on the nozzle seat plate and is connected with the nozzle through an air channel;
the bottom of the spray head is provided with four plastic grooves, the through holes at the bottom of the spray head are square, the cross sections of the plastic grooves are rectangular, and the four plastic grooves are distributed around the through holes at the bottom of the spray head at intervals of 90 degrees along the circumference;
the width of the plastic groove is smaller than that of the through hole at the bottom of the spray head, so that the cross section of the sprayed material wire is rectangular.
In the preferred scheme, a main control device is also arranged and is electrically connected with servo motors of the X-direction synchronous belt driving device and the Y-direction synchronous belt driving device;
the main control device is also electrically connected with the Z-direction driving motor and the wire supply servo motor of the wire supply mechanism, and the main control device adjusts the width of the sprayed material wire by adjusting the speed difference between the servo motors of the X-direction synchronous belt driving device and the Y-direction synchronous belt driving device and the wire supply servo motor.
According to the multi-nozzle 3D printing system, the independently controlled nozzle trolleys arranged on the X-direction multi-nozzle printing device can greatly improve the 3D printing speed, and the overall printing speed is improved by 2-7 times through measurement and calculation. In a preferable scheme, the shaping groove structure arranged on the spray head can output the material wire with the approximately rectangular cross section, so that the printing precision can be ensured after the diameter of the material wire is increased.
Drawings
The invention is further illustrated with reference to the following figures and examples:
fig. 1 is a perspective view of the overall structure of the present invention.
Fig. 2 is a perspective view of the Y-direction and Z-direction driving device of the present invention.
Fig. 3 is a schematic perspective view of an X-direction multi-nozzle printing apparatus according to the present invention.
Fig. 4 is a schematic perspective view of a filament supplying device according to the present invention.
Fig. 5 is a schematic perspective view of a filament supply mechanism according to the present invention.
FIG. 6 is a schematic perspective view of the spray head carriage of the present invention.
Fig. 7 is a schematic structural view of the head of the present invention.
Fig. 8 is a bottom view of the head of the present invention.
FIG. 9 is a schematic view of a stacked structure of workpiece wires according to the present invention.
In the figure: a first support frame 1, an X-direction multi-nozzle printing device 2, a sliding seat 201, an X-direction guide rail 202, an X-direction synchronous belt driving device 203, a nozzle trolley 204, a Y-direction sliding groove 205, an X-direction synchronous belt 206, a nozzle seat plate 207, a nozzle heating mechanism 208, a turbofan 209, an air duct 210, a nozzle 211, a heat conducting sheet 212, a shaping groove 213, a Y-direction Z-direction driving device 3, a Z-direction support frame 301, a workpiece platform 302, a Y-direction synchronous belt driving device 303, a Y-direction guide rail 304, a Z-direction driving screw 305, a Z-direction driving motor 306, a Y-direction synchronous belt 307, a wire supplying device 4, a wire winding disc 401, a support shaft 402, a mounting plate 403, a wire supplying mechanism 404, a fixed seat 405, a wire supplying gear 406, a wire supplying driving shaft 407, a wire pressing wheel 408, a pressing screw rod 409, an adjusting plate 410, a synchronous belt wheel 411, a pressing synchronous belt 412, a pressing driving wheel 413, a pressing motor 414, a pressing guide rod 415, a screw hole 416, guide hole 417, wire supply nozzle 418, wire 5 and half wire 51.
Detailed Description
Example 1:
as shown in fig. 1 to 3, a multi-nozzle high-speed 3D printing system includes a support frame 1, a Y-direction Z-direction driving device 3 is fixedly installed on the support frame 1, an X-direction multi-nozzle printing device 2 is movably installed on the Y-direction Z-direction driving device 3, and the X-direction multi-nozzle printing device 2 is driven by a Y-direction synchronous belt driving device 303 to reciprocate along a Y-axis;
the X-direction multi-nozzle printing device 2 is provided with a plurality of X-direction guide rails 202, a plurality of nozzle trolleys 204 are slidably mounted on the X-direction guide rails 202, a plurality of X-direction synchronous belt driving devices 203 are further provided, the number of the X-direction synchronous belt driving devices 203 is the same as that of the nozzle trolleys 204, and the nozzle trolleys 204 are fixedly connected with X-direction synchronous belts 206 of the X-direction synchronous belt driving devices 203 so that each X-direction synchronous belt driving device 203 drives one nozzle trolley 204 to reciprocate. With the structure, on a single-layer slice, waiting is not needed among all the spray heads, and the task of distributing to the current spray head trolley 204 can be completed independently, so that the printing speed is greatly improved. In this example, the X direction is the left-right direction in fig. 1, the Y direction is the front-back direction in fig. 1, and the Z direction is the up-down direction in fig. 1.
Preferably, as shown in fig. 2, the Y-direction and Z-direction driving device 3 has a structure in which:
the Z-direction support frame 301 is fixedly connected with the support frame 1, and the workpiece platform 302 is movably connected with the Z-direction support frame 301 and driven by a Z-direction driving device to reciprocate up and down;
the Y-direction timing belt driving device 303 and the Y-direction guide 304 are provided on the top of the Z-direction supporting frame 301, so that the X-direction multi-head printing device 2 is driven to reciprocate along the Y-axis by the Y-direction timing belt driving device 303.
A Y-direction chute 205, preferably a dovetail groove, is provided at the bottom of the X-direction multi-head printing device 2, the Y-direction chute 205 is slidably connected to a Y-direction rail 304, and a Y-direction timing belt 307 of a Y-direction timing belt driving device 303 is fixedly connected to the X-direction multi-head printing device 2.
Preferably, as shown in fig. 2, the structure of the Z-direction driving device is: a rotatable Z-direction driving screw 305 is arranged on the Z-direction supporting frame 301, the Z-direction driving screw 305 is in threaded connection with the workpiece platform 302, a Z-direction driving motor 306 is fixedly connected with the Z-direction driving screw 305, and the workpiece platform 302 is driven to reciprocate up and down through the Z-direction driving motor 306. The workpiece to be printed is divided into a plurality of layers, and after each layer is printed, the workpiece is descended by one layer through the Z-direction driving device to start new layer printing.
Preferably, as shown in fig. 3, the X-direction timing belt driving device 203 is configured such that two timing pulleys are disposed at both ends of the X-direction guide 202, an X-direction servo motor is connected to one of the timing pulleys, and the X-direction timing belt 206 is wound around the two timing pulleys.
In a preferred embodiment, as shown in fig. 4 and 5, a wire supply device 4 is further provided, the wire supply device 4 is provided with a plurality of rotatable wire winding disks 401, the number of the wire winding disks 401 is the same as that of the nozzle trolley 204, and a wire supply mechanism 404 is further provided on the wire supply device 4 for supplying the material wire 5 to the nozzle trolley 204.
Preferably, as shown in fig. 5, the wire feeding mechanism 404 has the following structure: the fixed seat 405 is provided with a wire supply gear 406 fixedly connected with the wire supply servo motor, the outer edge of the wire supply gear 406 is provided with teeth, one side of the outer edge of the wire supply gear 406 is also provided with a wire pressing wheel 408, the material wire is used for passing through between the wire supply gear 406 and the wire pressing wheel 408, and the feeding of the material wire is controlled through the rotating speed of the wire supply servo motor. Further preferably, an encoder is disposed coaxially with the wire feeding gear 406, and is used for detecting a rotation angle of the wire feeding gear 406, so as to calculate the feeding amount of the wire 5.
In a preferred scheme, two wire supply nozzles 418 for guiding the wires are further arranged on the fixed seat 405, and the two wire supply nozzles 418 are respectively positioned at the upstream and the downstream of the wire pressing wheel 408;
the wire pressing wheel 408 is rotatably mounted on an adjusting plate 410, a guide hole 417 and a screw hole 416 are arranged on a fixed seat 405, a pressing guide rod 415 and a pressing screw rod 409 are arranged on the adjusting plate 410, the pressing guide rod 415 is in sliding connection with the guide hole 417, the pressing screw rod 409 is in threaded connection with the screw hole 416, the pressing screw rod 409 is also connected with a pressing synchronous pulley 411, a pressing driving wheel 413 is further arranged on the adjusting plate 410, the pressing driving wheel 413 is fixedly connected with a pressing motor 414, and the pressing synchronous belt 412 bypasses the pressing synchronous pulley 411 and the pressing driving wheel 413 so as to adjust the pressing force of the wire pressing wheel 408 through the pressing motor 414. With the structure, different pressing forces are provided according to different materials of the feed wire 5.
In a preferred scheme as shown in fig. 6 to 8, the structure of the spray head trolley 204 is as follows: the nozzle base plate 207 is connected with the X-direction guide rail 202 in a sliding manner through a sliding sleeve, a nozzle heating mechanism 208 is fixedly arranged on the nozzle base plate 207, a nozzle 211 is arranged at the bottom of the nozzle heating mechanism 208, and the material wires penetrate into the nozzle 211 through the nozzle heating mechanism 208 and then are sprayed out through the nozzle 211. Preferably, a sleeve is further disposed between the nozzle heating mechanism 208 and the filament feeding nozzle 418 at the bottom of the filament feeding mechanism 404, and the sleeve is used for restraining the filament 5, so that the rotation of the filament feeding gear 406 can drive the feeding of the filament 5.
Preferably, as shown in fig. 6 and 7, a turbofan 209 is further disposed on the nozzle base plate 207, and the turbofan 209 is connected to the nozzle 211 through an air duct 210; preferably, a heat conducting sheet 212 is further provided around the shower head 211.
The bottom of the spray head 211 is provided with four plastic grooves 213, through holes at the bottom of the spray head 211 are square, the cross section of each plastic groove 213 is rectangular, and the four plastic grooves 213 are distributed around the through holes at the bottom of the spray head 211 at intervals of 90 degrees along the circumference;
the width of the plastic groove 213 is smaller than that of the through hole at the bottom of the spray head 211, so that the cross section of the sprayed material wire is rectangular. The inventor adopts a scheme of increasing the diameter of the thick material wire to improve the 3D printing speed, but the printing precision is synchronously reduced. For example, the diameter of the previous wire is 0.1-0.2 mm, the corresponding printing precision is 0.1mm, and after the wire with the diameter of 0.5-1 mm is adopted, although the printing speed is greatly improved, the printing precision is also reduced to 0.5mm, and by adopting the scheme, the printing precision can be effectively controlled. Compared with the scheme in the prior art, the ejected material wire is shaped into a standard rectangular shape, and compared with the circular scheme, the printing precision is obviously improved.
In a preferred scheme, as shown in fig. 9, a master control device is further provided, and the master control device is electrically connected with servo motors of the X-direction synchronous belt driving device 203 and the Y-direction synchronous belt driving device 303;
the main control device is also electrically connected with the Z-direction driving motor 306 and the wire feeding servo motor of the wire feeding mechanism 404, and the main control device adjusts the width of the sprayed material wire by adjusting the speed difference between the servo motors of the X-direction synchronous belt driving device 203 and the Y-direction synchronous belt driving device 303 and the wire feeding servo motor. In the jetting process, as in the structure of fig. 9, when printing is performed using wide strands, for example, strands having a diameter of 0.5mm, the strands in each layer are staggered, and the strands at the edges need to be narrowed in width to ensure printing accuracy. Therefore, when the edge filament is printed, the ejected filament is stretched by adopting the scheme of controlling the filament by adjusting the speed, so that a workpiece with a thinner diameter and a smooth edge can be obtained, the printing precision is improved, and only measurement and calculation are carried out, so that the printing precision can be controlled to be 0.1-0.2 mm. The main control device in this example adopts a single chip microcomputer, preferably an STM32F series single chip microcomputer. Further preferably, the device is further provided with a lower-level single chip microcomputer, and each single chip microcomputer controls the X-direction movement of 1-2 spray head trolleys 204 and the corresponding wire supply servo motor of the wire supply mechanism 404. The subordinate single chip microcomputer is electrically connected with the single chip microcomputer of the main control device.
Example 2:
on the basis of example 1, a printed surgical splint structure is described as an example:
s1, scanning the part of the patient needing to be provided with the splint, obtaining the three-dimensional shape of the part, designing the splint structure, splitting the splint into two parts, and then printing the two parts respectively.
And S2, layering the cross section of the clamping plate, and then dividing each layer into columns according to the number and the distance of the spray heads, wherein the number of the columns is multiplied by 2. Taking 8 nozzles as an example, the nozzles are divided into 16 rows.
And S3, printing the interval columns, namely 1, 3 and 5 … … 15 columns, in each layer, and printing 2, 4 and 6 … … 16 columns after all the columns are printed. Each strand is output in a rectangular arrangement.
S4, for the filament at the edge of the clamping plate, the main control device reduces the rotation speed of the filament feeding servo motor of the filament feeding gear 406, and the speed of the X-direction synchronous belt driving device 203 or the Y-direction synchronous belt driving device 303 is kept unchanged, so that the diameter of the filament at the edge is reduced due to stretching, thereby improving the printing precision.
And S5, when the workpieces of each layer are printed, the distribution of the material wires deviates a distance along the X axis or the Y axis, and the deviation distance is less than the width of the material wires 5, preferably 1/2 of the width of the material wires 5.
The above-described embodiments are merely preferred technical solutions of the present invention, and should not be construed as limiting the present invention, and the embodiments and features in the embodiments in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (2)
1. The utility model provides a high-speed 3D printing system of many shower nozzles, includes support frame (1), characterized by: a Y-direction and Z-direction driving device (3) is fixedly arranged on the support frame (1), an X-direction multi-nozzle printing device (2) is movably arranged on the Y-direction and Z-direction driving device (3), and the X-direction multi-nozzle printing device (2) is driven by a Y-direction synchronous belt driving device (303) to reciprocate along a Y axis;
the X-direction multi-nozzle printing device (2) is provided with a plurality of X-direction guide rails (202), a plurality of nozzle trolleys (204) are slidably mounted on the X-direction guide rails (202), a plurality of X-direction synchronous belt driving devices (203) are further arranged, the number of the X-direction synchronous belt driving devices (203) is the same as that of the nozzle trolleys (204), and the nozzle trolleys (204) are fixedly connected with X-direction synchronous belts (206) of the X-direction synchronous belt driving devices (203) so that each X-direction synchronous belt driving device (203) respectively drives one nozzle trolley (204) to reciprocate;
the structure of the Y-direction and Z-direction driving device (3) is as follows:
the Z-direction support frame (301) is fixedly connected with the support frame (1), and the workpiece platform (302) is movably connected with the Z-direction support frame (301) and driven by the Z-direction driving device to reciprocate up and down;
a Y-direction synchronous belt driving device (303) and a Y-direction guide rail (304) are arranged at the top of the Z-direction supporting frame (301),
a Y-direction chute (205) is arranged at the bottom of the X-direction multi-nozzle printing device (2), the Y-direction chute (205) is connected with a Y-direction guide rail (304) in a sliding manner, and a Y-direction synchronous belt (307) of a Y-direction synchronous belt driving device (303) is fixedly connected with the X-direction multi-nozzle printing device (2);
the X-direction synchronous belt driving device (203) is structurally characterized in that two synchronous belt wheels are arranged at the positions of two ends of an X-direction guide rail (202), an X-direction servo motor is connected with one of the synchronous belt wheels, and an X-direction synchronous belt (206) bypasses the two synchronous belt wheels;
the wire feeding device (4) is further provided with a plurality of rotatable wire coiling disks (401), the number of the wire coiling disks (401) is the same as that of the spray head trolleys (204), and the wire feeding device (4) is further provided with a wire feeding mechanism (404) for feeding the material wires (5) to the spray head trolleys (204);
the structure of the wire supply mechanism (404) is as follows: a wire supply gear (406) fixedly connected with a wire supply servo motor is arranged on the fixing seat (405), teeth are arranged on the outer edge of the wire supply gear (406), a wire pressing wheel (408) is further arranged on one side of the outer edge of the wire supply gear (406), the material wire is used for passing through between the wire supply gear (406) and the wire pressing wheel (408), and the feeding of the material wire is controlled through the rotating speed of the servo motor;
two wire supply nozzles (418) for guiding the material wires are further arranged on the fixed seat (405), and the two wire supply nozzles (418) are respectively positioned at the upstream and the downstream of the wire pressing wheel (408);
the wire pressing wheel (408) is rotatably arranged on the adjusting plate (410), a guide hole (417) and a screw hole (416) are arranged on the fixed seat (405), a pressing guide rod (415) and a pressing screw rod (409) are arranged on the adjusting plate (410), the pressing guide rod (415) is in sliding connection with the guide hole (417), the pressing screw rod (409) is in threaded connection with the screw hole (416), the pressing screw rod (409) is also connected with a pressing synchronous belt wheel (411), a pressing driving wheel (413) is also arranged on the adjusting plate (410), the pressing driving wheel (413) is fixedly connected with a pressing motor (414), the pressing synchronous belt (412) bypasses the pressing synchronous belt wheel (411) and the pressing driving wheel (413), so that the pressing force of the wire pressing wheel (408) is adjusted through the pressing motor (414);
the structure of the spray head trolley (204) is as follows: the spray head seat plate (207) is connected with the X-direction guide rail (202) in a sliding mode through a sliding sleeve, a spray head heating mechanism (208) is fixedly arranged on the spray head seat plate (207), a spray head (211) is arranged at the bottom of the spray head heating mechanism (208), and the material wires penetrate into the spray head (211) through the spray head heating mechanism (208);
a turbine fan (209) is also arranged on the spray head seat plate (207), and the turbine fan (209) is connected with the spray head (211) through an air duct (210);
the bottom of the spray head (211) is provided with four plastic grooves (213), through holes at the bottom of the spray head (211) are square, the cross section of each plastic groove (213) is rectangular, and the four plastic grooves (213) are distributed around the through holes at the bottom of the spray head (211) at intervals of 90 degrees along the circumference;
the width of the plastic groove (213) is smaller than that of the through hole at the bottom of the spray head (211), so that the cross section of the sprayed material wire is rectangular;
the main control device is also arranged and is electrically connected with servo motors of the X-direction synchronous belt driving device (203) and the Y-direction synchronous belt driving device (303);
the main control device is also electrically connected with a Z-direction driving motor (306) and a wire supply servo motor of the wire supply mechanism (404), and the main control device adjusts the width of the sprayed material wire by adjusting the speed difference between the servo motors of the X-direction synchronous belt driving device (203) and the Y-direction synchronous belt driving device (303) and the wire supply servo motor;
the diameter of the material wires is 0.5-1 mm, the material wires in each layer are arranged in a staggered mode, and the material wires on the edges contract in width to ensure printing accuracy.
2. The multi-nozzle high-speed 3D printing system of claim 1, wherein: the structure of the Z-direction driving device is as follows: a rotatable Z-direction driving screw rod (305) is arranged on the Z-direction supporting frame (301), the Z-direction driving screw rod (305) is in threaded connection with the workpiece platform (302), a Z-direction driving motor (306) is fixedly connected with the Z-direction driving screw rod (305), and the workpiece platform (302) is driven to reciprocate up and down through the Z-direction driving motor (306).
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