CN109910299A - The powdering condition detection method and device of 3D printer - Google Patents
The powdering condition detection method and device of 3D printer Download PDFInfo
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- CN109910299A CN109910299A CN201711326332.9A CN201711326332A CN109910299A CN 109910299 A CN109910299 A CN 109910299A CN 201711326332 A CN201711326332 A CN 201711326332A CN 109910299 A CN109910299 A CN 109910299A
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- light curtain
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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
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
-
- 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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
Abstract
The present invention provides the powdering condition detection method and device of a kind of 3D printer, this method, comprising: the powdering state of current printable layer is measured by light curtain, wherein the light curtain is parallel with the printing plane of the 3D printer；According to the powdering state of current printable layer, judge whether current printable layer is normal；If normal, then next layer is printed；If abnormal, the control signal being adjusted correspondingly to the current printable layer is generated according to abnormal type.The present invention, which realizes, is monitored the print state of each layer of powder of 3D printer, finds and handles the printable layer of powdering exception in time, guarantee the quality of printed product.
Description
Technical field
The present invention relates to 3D printer technical field more particularly to the powdering condition detection methods and dress of a kind of 3D printer
It sets.
Background technique
3D printing technique (3D printing), belongs to one kind of rapid prototyping technology, it is that a kind of digital model file is
Basis constructs the technology of object with adhesive materials such as powdery metal or plastics by way of successively stacking accumulation.
Existing 3D printing technique is in terms of powder laying, the main kinematic accuracy and sandwich for passing through elevating mechanism
Machining accuracy come guarantee powder be laid with uniformity.Motion control and Slicking apparatus of this mode to elevating mechanism
The machining accuracy of structure requires high.
But by the improvement to elevating mechanism and sandwich, powdering during 3D printing still can not be avoided completely
Non-uniform problem.When there is the uneven situation of powdering, if being unable to timely correction, it will seriously affect the matter of printed product
Amount.
Summary of the invention
The present invention provides the powdering condition detection method and device of a kind of 3D printer, to realize to each layer of 3D printer
The print state of powder is monitored, and finds and handle the printable layer of powdering exception in time, guarantees the quality of printed product.
In a first aspect, the present invention provides a kind of powdering condition detection method of 3D printer, comprising:
The powdering state of current printable layer is measured by light curtain, wherein the printing of the light curtain and the 3D printer
Plane is parallel；
According to the powdering state of current printable layer, judge whether current printable layer is normal；If normal, then next layer is printed；
If abnormal, the control signal being adjusted correspondingly to the current printable layer is generated according to abnormal type.
Optionally, the powdering state that current printable layer is measured by light curtain, comprising:
Height and position where control light curtain from an adjacent upper printable layer moves down, and receives until in light curtain receiving end
Stop when to light curtain；
The mobile distance of light curtain is recorded, and analyzes the light curtain that the light curtain receiving end receives.
Optionally, the powdering state of the current printable layer of the basis judges whether current printable layer is normal, comprising:
When the mobile distance of light curtain is equal to preset threshold value, and when the light curtain that receives of the light curtain receiving end is complete, then
Determine that current printable layer is normal；
When the mobile distance of light curtain is imperfect not equal to the light curtain that preset threshold value or the light curtain receiving end receive
When, it is determined that current printable layer is abnormal.
It is optionally, described that the current printable layer is adjusted correspondingly according to abnormal type, comprising:
It is greater than preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, obtains
The first difference between light curtain moving distance and preset threshold is taken, the thickness equal to first difference is rooted out on current printable layer
One layer of powder of degree；
It is less than preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, obtains
The second difference between preset threshold and light curtain moving distance is taken, addition is equal to the thickness of second difference on current printable layer
One layer of powder of degree；
When the light curtain that the light curtain receiving end receives is imperfect, the powder that current printable layer prints is rooted out；And root
Current layer is printed again according to preset powdering thickness.
Second aspect, the present invention provide a kind of powdering condition checkout gear of 3D printer, comprising:
Laser thickness gauge, for measuring the powdering state of current printable layer by light curtain, wherein the light curtain with it is described
The printing plane of 3D printer is parallel；
Processor judges whether current printable layer is normal for the powdering state according to current printable layer；If normal, then
Print next layer；If abnormal, generated according to abnormal type and the control that the current printable layer is adjusted correspondingly is believed
Number.
Optionally, the laser thickness gauge, is specifically used for:
Height and position where control light curtain from an adjacent upper printable layer moves down, and receives until in light curtain receiving end
Stop when to light curtain；
The mobile distance of light curtain is recorded, and analyzes the light curtain that the light curtain receiving end receives.
Optionally, the laser thickness gauge includes: laser emitter, laser sensor, light curtain analyzer；
The laser emitter is located at the side of the printing plane of the 3D printer, for emitting light curtain；Wherein, described
The height-adjustable or described laser emitter of the light curtain of laser transmitter projects it is height-adjustable；
The laser sensor is located at the other side of the printing plane of the 3D printer, for receiving the Laser emission
The light curtain of device transmitting, and the light curtain received is sent to the processor；
The light curtain analyzer, the distance moved for recording light curtain, analyzes the light curtain that the laser sensor receives,
To obtain the powdering state of current printable layer.
Optionally, the processor, is specifically used for:
It is equal to preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, then
Determine that current printable layer is normal；
It is imperfect not equal to the light curtain that preset threshold value or the light curtain receiving end receive in the mobile distance of light curtain
When, it is determined that current printable layer is abnormal.
Optionally, further includes:
Powdering component, the control signal for being sent according to processor execute powder feeding, powdering, strike off operation, or shovel powder
Operation；
Lifting assembly, the height of control signal control powdering component and/or print components for being sent according to processor；
Printer control mainboard, the control signal for being sent according to processor, generate corresponding starting print signal or
Person's time-out printing signal, and the starting print signal or time-out printing signal are sent to print components；
Print components execute printing for the starting print signal according to the transmission of the printer control mainboard；
Or the time-out printing signal of the transmission according to the printer control mainboard, suspend current printing.
Optionally, the processor, is specifically used for:
It is greater than preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, obtains
The first difference between light curtain moving distance and preset threshold is taken, is rooted out on current printable layer by powdering component described in being equal to
One layer of powder of the thickness of the first difference；
It is less than preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, obtains
The second difference between preset threshold and light curtain moving distance is taken, is added on current printable layer by powdering component described in being equal to
One layer of powder of the thickness of the second difference；
When the light curtain that the light curtain receiving end receives is imperfect, the powder that is printed current printable layer by powdering component
It roots out at end；And current layer is printed according to preset powdering thickness again.
The powdering condition detection method and device of 3D printer provided by the invention, current printable layer is measured by light curtain
Powdering state judge whether current printable layer normal according to the powdering state of current printable layer；If normal, then it prints next
Layer；If abnormal, the control signal being adjusted correspondingly to the current printable layer is generated according to abnormal type.To real
Show and the print state of each layer of powder of 3D printer has been monitored, found and handle the printable layer of powdering exception in time, has protected
Demonstrate,prove the quality of printed product.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the top view of 3D printer provided by the invention；
Fig. 2 is the flow chart of the powdering condition detection method for the 3D printer that the embodiment of the present invention one provides；
Fig. 3 is the structural schematic diagram of the powdering condition checkout gear for the 3D printer that the embodiment of the present invention one provides；
Fig. 4 is the top view of the powdering condition checkout gear for the 3D printer that the embodiment of the present invention one provides；
In figure:
1- powdering component；
2- lifting assembly；
3- print components；
4- powder box；
5- print control mainboard；
6- programmable logic controller (PLC) PLC；
7-RS485 bus；
8- servo motor；
9- laser sensor；
10- light curtain；
11- laser emitter.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Description and claims of this specification and term " first ", " second ", " third " " in above-mentioned attached drawing
The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage
The data that solution uses in this way are interchangeable under appropriate circumstances, so that the embodiment of the present invention described herein for example can be to remove
Sequence other than those of illustrating or describe herein is implemented.In addition, term " includes " and " having " and theirs is any
Deformation, it is intended that cover it is non-exclusive include, for example, containing the process, method of a series of steps or units, system, production
Product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for this
A little process, methods, the other step or units of product or equipment inherently.
Technical solution of the present invention is described in detail with specifically embodiment below.These specific implementations below
Example can be combined with each other, and the same or similar concept or process may be repeated no more in some embodiments.
Hereinafter, the part term in the application is explained, in order to those skilled in the art understand that:
1) 3D printing technique (3D printing), belongs to one kind of rapid prototyping technology, it is a kind of digital model file
Based on, with adhesive materials such as powdery metal or plastics, the skill of object is constructed by way of successively stacking accumulation
Art (i.e. " lamination appearance method ").
2) programmable logic controller (PLC) (Programmable Logic Controller, PLC), it can be compiled using one kind
The memory of journey is used for its internally stored program, execute logical operation, sequential control, timing, counting and arithmetical operation etc. towards
The instruction of user, and various types of mechanical or production processes are controlled by number or analog pattern input/output.
3) RS485 communication interface, refer to using differential signal negative logic carry out data communication, wherein
+ 2V~+6V indicates " 0 ", and -6V~-2V indicates " 1 ".RS485 has the two kinds of wiring of two-wire system and four-wire system, four-wire system
It is full duplex communication mode, two-wire system is half duplex communication mode.
The powdering condition detection method of 3D printer provided by the invention, can apply it is existing using powder printing
In 3D printer.Fig. 1 is the top view of 3D printer provided by the invention, as shown in Figure 1, comprising: powdering component 1, lifting group
Part 2, print components 3 and powder box 4；The lifting assembly 2 controls the height of powder box 4, when reaching preset height, paving
Powder in powder box 4 is laid on the current layer of workpiece by component powder 1, and finally completes beating for current layer by print components 3
Print.3D printer in Fig. 1 mainly passes through the kinematic accuracy of elevating mechanism (lifting assembly 2) and the machining of sandwich
Precision come guarantee powder be laid with uniformity.This mode adds the motion control of elevating mechanism and the machinery of sandwich
Work required precision is high.But by the improvement to elevating mechanism and sandwich, it is still unavoidable from powdering during 3D printing
Non-uniform problem.When there is the uneven situation of powdering, if being unable to timely correction, it will seriously affect the matter of printed product
Amount.
The powdering condition detection method of 3D printer provided by the invention, it is intended to which the technology as above for solving the prior art is asked
Topic.
How to be solved with technical solution of the specifically embodiment to technical solution of the present invention and the application below above-mentioned
Technical problem is described in detail.These specific embodiments can be combined with each other below, for the same or similar concept
Or process may repeat no more in certain embodiments.Below in conjunction with attached drawing, the embodiment of the present invention is described.
Fig. 2 is the flow chart of the powdering condition detection method for the 3D printer that the embodiment of the present invention one provides, such as Fig. 2 institute
Show, the method in the present embodiment may include:
S101, the powdering state that current printable layer is measured by light curtain.
In the present embodiment, the light curtain is parallel with the printing plane of the 3D printer, by light curtain to current printable layer
It is scanned, obtains the powdering state of current printable layer.
It is alternatively possible to moved down by height and position where control light curtain from an adjacent upper printable layer, until
The stopping when light curtain receiving end receives light curtain；The mobile distance of light curtain is recorded, and analyzes what the light curtain receiving end received
Light curtain.
S102, the powdering state according to current printable layer, judge whether current printable layer is normal；If normal, then step is executed
Rapid S104；If abnormal, S103 is thened follow the steps.
In the present embodiment, it can be sentenced according to the mobile distance of the light curtain integrality and light curtain that light curtain receiving end receives
Break the powdering state of current printable layer.
Optionally, when the mobile distance of light curtain is equal to preset threshold value, and the light curtain that the light curtain receiving end receives is complete
When whole, it is determined that current printable layer is normal；
When the mobile distance of light curtain is imperfect not equal to the light curtain that preset threshold value or the light curtain receiving end receive
When, it is determined that current printable layer is abnormal.
S103, the control signal being adjusted correspondingly to current printable layer is generated according to abnormal type.
In the present embodiment, the integrality of the light curtain received according to the mobile distance of light curtain and light curtain receiving end is determined
The Exception Type of current printable layer.The Exception Type includes: that printable layer is blocked up, printable layer is excessively thin, printable layer is uneven.According to
Abnormal type generates corresponding control signal, which is sent to the print components of 3D printer.
Optionally, it is greater than preset threshold value in the mobile distance of light curtain, and the light curtain that the light curtain receiving end receives is complete
When whole, the first difference between light curtain moving distance and preset threshold is obtained, is rooted out on current printable layer equal to described first
One layer of powder of the thickness of difference；
It is less than preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, obtains
The second difference between preset threshold and light curtain moving distance is taken, addition is equal to the thickness of second difference on current printable layer
One layer of powder of degree；
When the light curtain that the light curtain receiving end receives is imperfect, the powder that current printable layer prints is rooted out；And root
Current layer is printed again according to preset powdering thickness.
S104, the next layer of printing.
The present embodiment measures the powdering state of current printable layer by light curtain, according to the powdering state of current printable layer,
Judge whether current printable layer is normal；If normal, then next layer is printed；If abnormal, generated according to abnormal type to described
The control signal that current printable layer is adjusted correspondingly.To realize to the print state of each layer of powder of 3D printer into
Row monitoring, finds in time and handles the printable layer of powdering exception, guarantee the quality of printed product.
Fig. 3 is the structural schematic diagram of the powdering condition checkout gear for the 3D printer that the embodiment of the present invention one provides, such as Fig. 3
Shown, the device in the present embodiment may include:
Laser thickness gauge 20, for measuring the powdering state of current printable layer by light curtain, wherein the light curtain and institute
The printing plane for stating 3D printer is parallel；
Processor 30 judges whether current printable layer is normal for the powdering state according to current printable layer；If normal,
Then print next layer；If abnormal, the control being adjusted correspondingly to the current printable layer is generated according to abnormal type
Signal.
Processor in the present embodiment can be programmable logic controller (PLC) PLC, microprocessor, single-chip microcontroller.Specifically, originally
It is illustrated by taking programmable logic controller (PLC) PLC as an example in embodiment, PLC can pass through each of RS485 bus and 3D printer
A component carries out data communication.
Optionally, the laser thickness gauge 20, is specifically used for:
Height and position where control light curtain from an adjacent upper printable layer moves down, and receives until in light curtain receiving end
Stop when to light curtain；
The mobile distance of light curtain is recorded, and analyzes the light curtain that the light curtain receiving end receives.
Optionally, the processor 30, is specifically used for:
It is equal to preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, then
Determine that current printable layer is normal；
It is imperfect not equal to the light curtain that preset threshold value or the light curtain receiving end receive in the mobile distance of light curtain
When, it is determined that current printable layer is abnormal.
Optionally, the processor 30, is also used to:
It is greater than preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, obtains
The first difference between light curtain moving distance and preset threshold is taken, is rooted out on current printable layer by powdering component described in being equal to
One layer of powder of the thickness of the first difference；
It is less than preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, obtains
The second difference between preset threshold and light curtain moving distance is taken, is added on current printable layer by powdering component described in being equal to
One layer of powder of the thickness of the second difference；
When the light curtain that the light curtain receiving end receives is imperfect, the powder that is printed current printable layer by powdering component
It roots out at end；And current layer is printed according to preset powdering thickness again.
The present embodiment measures the powdering state of current printable layer by light curtain that laser thickness gauge 20 issues, according to working as
The powdering state of preceding printable layer judges whether current printable layer is normal；If normal, then next layer is printed；If abnormal, according to different
Normal type generates the control signal being adjusted correspondingly to the current printable layer.It is each to 3D printer to realize
The print state of layer powder is monitored, and is found and is handled the printable layer of powdering exception in time, guarantee the quality of printed product.
Fig. 4 is the top view of the powdering condition checkout gear for the 3D printer that the embodiment of the present invention one provides, such as Fig. 4 institute
Show, the device in the present embodiment includes: powdering component 1, lifting assembly 2, print components 3, powder box 4, printer control mainboard
5, laser thickness gauge, programmable logic controller (PLC) PLC 6, RS485 bus 7, servo motor 8；Wherein: the programmable logic control
Device PLC 6 processed is electrically connected by RS485 bus 7 with powdering component 1, lifting assembly 2, print components 3, printer control mainboard 5.
In a kind of wherein embodiment, the laser thickness gauge includes: laser emitter 11, laser sensor 9, light curtain point
Parser；The laser emitter 11 is located at the side of the printing plane of the 3D printer, for emitting light curtain；Wherein, described
Laser emitter 11 emit light curtain height-adjustable or described laser emitter 11 it is height-adjustable.The laser
Sensor 9 is located at the other side of the printing plane of the 3D printer, the light curtain emitted for receiving the laser emitter 11,
And the light curtain received is sent to the processor.The light curtain analyzer analyzes institute for recording the mobile distance of light curtain
The light curtain that laser sensor receives is stated, to obtain the powdering state of current printable layer.
Powdering component 1, the control signal for being sent according to processor execute powder feeding, powdering, strike off operation, or shovel
Powder operation.Lifting assembly 2, the height of control signal control powdering component and/or print components for being sent according to processor.
Printer control mainboard 5, the control signal for being sent according to processor, generates corresponding starting print signal or pause is beaten
Official seal number, and the starting print signal or time-out printing signal are sent to print components.Print components 3 are used for basis
The starting print signal of the transmission of the printer control mainboard executes printing；Or it is controlled and is led according to the printer
The time-out printing signal of the transmission of plate, suspends current printing.
Optionally, the thickness number for each printable layer that the programmable logic controller (PLC) PLC 6 can also will test
According to being stored, in order to analyze print procedure, it is ensured that each layer of print quality.
The present embodiment is realized by programmable logic controller (PLC) PLC and laser thickness gauge cooperation to each printable layer
The detection of powdering state, high degree of automation can find the abnormality of printable layer in time, to occur abnormal printable layer into
Row finishing, to improve the print quality of product.
In the description of the present invention, it is to be understood that, used term " center ", " length ", " width ", " thickness
Degree ", " top ", " bottom end ", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outside" " axis
To ", the indicating positions such as " circumferential direction " or positional relationship all can be based on the orientation or positional relationship shown in the drawings, merely to just
In description the present invention and simplify description, rather than the position of indication or suggestion meaning or original part must have a particular orientation, with
Specific construction and operation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
It shall be understood in a broad sense, such as may be a fixed connection, may be a detachable connection, or be integrally formed；It can be mechanical connection,
It is also possible to be electrically connected or can communicate with each other；It can be directly connected, can also indirectly connected through an intermediary, it can be with
Make the connection inside two elements or the interaction relationship of two elements.For the ordinary skill in the art, may be used
To understand the concrete meaning of above-mentioned term in the present invention as the case may be.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of powdering condition detection method of 3D printer characterized by comprising
The powdering state of current printable layer is measured by light curtain, wherein the printing plane of the light curtain and the 3D printer
In parallel；
According to the powdering state of current printable layer, judge whether current printable layer is normal；If normal, then next layer is printed；If different
Often, then the control signal being adjusted correspondingly to the current printable layer is generated according to abnormal type.
2. the method according to claim 1, wherein the powdering shape for measuring current printable layer by light curtain
State, comprising:
Height and position where control light curtain from an adjacent upper printable layer moves down, until receiving light in light curtain receiving end
Stop when curtain；
The mobile distance of light curtain is recorded, and analyzes the light curtain that the light curtain receiving end receives.
3. according to the method described in claim 2, it is characterized in that, the powdering state of the current printable layer of the basis, judgement are worked as
Whether preceding printable layer is normal, comprising:
When the mobile distance of light curtain is equal to preset threshold value, and when the light curtain that receives of the light curtain receiving end is complete, it is determined that
Current printable layer is normal；
When the mobile distance of light curtain is imperfect not equal to the light curtain that preset threshold value or the light curtain receiving end receive,
Then determine that current printable layer is abnormal.
4. method according to any one of claim 1-3, which is characterized in that described to be worked as according to abnormal type to described
Preceding printable layer is adjusted correspondingly, comprising:
It is greater than preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, obtains light
The first difference between curtain moving distance and preset threshold, roots out the thickness equal to first difference on current printable layer
One layer of powder；
It is less than preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, obtains pre-
If the second difference between threshold value and light curtain moving distance, addition is equal to the thickness of second difference on current printable layer
One layer of powder；
When the light curtain that the light curtain receiving end receives is imperfect, the powder that current printable layer prints is rooted out；And according to pre-
If powdering thickness print current layer again.
5. a kind of powdering condition checkout gear of 3D printer characterized by comprising
Laser thickness gauge, for measuring the powdering state of current printable layer by light curtain, wherein the light curtain and the 3D are beaten
The printing plane of print machine is parallel；
Processor judges whether current printable layer is normal for the powdering state according to current printable layer；If normal, then it prints
Next layer；If abnormal, the control signal being adjusted correspondingly to the current printable layer is generated according to abnormal type.
6. device according to claim 5, which is characterized in that the laser thickness gauge is specifically used for:
Height and position where control light curtain from an adjacent upper printable layer moves down, until receiving light in light curtain receiving end
Stop when curtain；
The mobile distance of light curtain is recorded, and analyzes the light curtain that the light curtain receiving end receives.
7. device according to claim 5, which is characterized in that the laser thickness gauge includes: laser emitter, laser
Sensor, light curtain analyzer；
The laser emitter is located at the side of the printing plane of the 3D printer, for emitting light curtain；Wherein, the laser
Transmitter transmitting light curtain height-adjustable or described laser emitter it is height-adjustable；
The laser sensor is located at the other side of the printing plane of the 3D printer, for receiving the laser emitter hair
The light curtain penetrated, and the light curtain received is sent to the processor；
The light curtain analyzer analyzes the light curtain that the laser sensor receives, for recording the mobile distance of light curtain to obtain
To the powdering state of current printable layer.
8. device according to claim 6, which is characterized in that the processor is specifically used for:
It is equal to preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, it is determined that
Current printable layer is normal；
When the mobile distance of light curtain is imperfect not equal to the light curtain that preset threshold value or the light curtain receiving end receive,
Then determine that current printable layer is abnormal.
9. device according to claim 5, which is characterized in that further include:
Powdering component, the control signal for being sent according to processor execute powder feeding, powdering, strike off operation, or shovel powder behaviour
Make；
Lifting assembly, the height of control signal control powdering component and/or print components for being sent according to processor；
Printer control mainboard, the control signal for being sent according to processor generate corresponding starting print signal or temporary
Stop print signal, and the starting print signal or time-out printing signal are sent to print components；
Print components execute printing for the starting print signal according to the transmission of the printer control mainboard；Or
According to the time-out printing signal of the transmission of the printer control mainboard, suspend current printing.
10. the device according to any one of claim 5-9, which is characterized in that the processor is specifically used for:
It is greater than preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, obtains light
The first difference between curtain moving distance and preset threshold, is rooted out on current printable layer equal to described first by powdering component
One layer of powder of the thickness of difference；
It is less than preset threshold value in the mobile distance of light curtain, and when the light curtain that receives of the light curtain receiving end is complete, obtains pre-
If the second difference between threshold value and light curtain moving distance, is added on current printable layer by powdering component and be equal to described second
One layer of powder of the thickness of difference；
When the light curtain that the light curtain receiving end receives is imperfect, shoveled by the powder that powdering component prints current printable layer
It removes；And current layer is printed according to preset powdering thickness again.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711326332.9A CN109910299B (en) | 2017-12-13 | 2017-12-13 | Powder spreading state detection method and device of 3D printer |
| PCT/CN2018/101799 WO2019114318A1 (en) | 2017-12-13 | 2018-08-22 | Powder laying state detection method and device for 3d printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711326332.9A CN109910299B (en) | 2017-12-13 | 2017-12-13 | Powder spreading state detection method and device of 3D printer |
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| Publication Number | Publication Date |
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| CN109910299A true CN109910299A (en) | 2019-06-21 |
| CN109910299B CN109910299B (en) | 2021-06-04 |
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| CN201711326332.9A Active CN109910299B (en) | 2017-12-13 | 2017-12-13 | Powder spreading state detection method and device of 3D printer |
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| CN (1) | CN109910299B (en) |
| WO (1) | WO2019114318A1 (en) |
Cited By (1)
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| WO2023185930A1 (en) * | 2022-03-31 | 2023-10-05 | 深圳市纵维立方科技有限公司 | Printing control method, photocuring three-dimensional printer and readable storage medium |
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| CN104669618A (en) * | 2013-11-30 | 2015-06-03 | 西安中科麦特电子技术设备有限公司 | Control system for 3D printing rapid prototyping device |
| CN106041080B (en) * | 2016-07-21 | 2018-01-16 | 中北大学 | Dusty material laser sintering (SLS) device |
| CN106626377B (en) * | 2016-10-25 | 2019-08-30 | 天津清研智束科技有限公司 | The increasing material manufacturing method and increasing material manufacturing device of real-time detection powder bed surface deformation |
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| WO2017005675A1 (en) * | 2015-07-09 | 2017-01-12 | Siemens Aktiengesellschaft | Method for monitoring a process for powder-bed based additive manufacturing of a component and such a system |
| CN206573076U (en) * | 2017-02-20 | 2017-10-20 | 北京恒尚科技有限公司 | A kind of special substrate of SLM device, scraper relative position measurement device |
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| WO2019114318A1 (en) | 2019-06-20 |
| CN109910299B (en) | 2021-06-04 |
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