CN107199339A - Powdering precise control device and method for laser fast shaping equipment - Google Patents
Powdering precise control device and method for laser fast shaping equipment Download PDFInfo
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- CN107199339A CN107199339A CN201710607458.7A CN201710607458A CN107199339A CN 107199339 A CN107199339 A CN 107199339A CN 201710607458 A CN201710607458 A CN 201710607458A CN 107199339 A CN107199339 A CN 107199339A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/22—Driving means
- B22F12/224—Driving means for motion along a direction within the plane of a layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/50—Means for feeding of material, e.g. heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/60—Planarisation devices; Compression devices
- B22F12/67—Blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/90—Means for process control, e.g. cameras or sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/003—Apparatus, e.g. furnaces
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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
- B33Y10/00—Processes of 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
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/70—Recycling
- B22F10/73—Recycling of powder
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Laser Beam Processing (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Powdering precise control device and method for laser fast shaping equipment, belong to laser fast shaping, laser measurement field, including scraper motion controller, scraper height adjuster, powdering scraper, laser displacement sensor, guide rail, moulding cylinder, powdering substrate, powdering substrate motion controller, powder feeding cylinder, powder feeding substrate, powder feeding substrate motion controller, recovery tank, it is molded panel and supporting plate, wherein scraper motion controller, scraper height adjuster, laser displacement sensor, powdering substrate motion controller and powder feeding substrate motion controller are connected with industrial computer.The powder feeding of laser fast shaping equipment and powdering can be used for using the device and method of the present invention, and utilize laser measuring technique, accurate measurement position, by installing laser displacement sensor on powdering scraper, accurate measurement powdering scraper and powdering substrate spacing, the brought influence different with powdering substrate thickness of motion backhaul difference is eliminated, powder layer thickness is accurately controlled, improves part processing precision.
Description
Technical field
The invention belongs to laser fast shaping, laser measurement field, more particularly to one kind is set for laser fast shaping
Standby powdering precise control device and method.
Background technology
Rapid shaping, is a kind of quick manufacture using " Layered manufacturing, superposition shaping " principle.It passes through computer
Software is aided in, and designed part is carried out into a series of digital " sections ", and these slice informations are sent on former,
Material is continuously stacked up and solidified from the bottom to top by " hierarchy slicing ", until a solid body shaping.
Compared with conventional fabrication processes, rapid shaping technique can be according to design, just can be straight without machining or mould
The object that any shape is generated from computer graphics data is connect, easily realizes that personalized customization is processed；Part design need not
It can be realized dependent on processing technology again；Can be with one-shot forming, quick manufacture eliminates the multiple working procedure of traditional handicraft, shortened
Production cycle of product, improve productivity ratio；The unconventional Subtraction method using method of addition, saves raw material, does not have substantially
Discarded object is produced, and is that manufacturing industry revolution brings new vitality.
With the development of laser technology, research has been increasingly becoming for the laser fast shaping equipment of machining tool using laser
Focus.Rapid laser-shaping technique, is to utilize under superlaser effect, metal dust Flashmelt is fast after cooling
The principle of speed solidification, layer by layer accumulation molds the rapid shaping technique of 3D solid.Layering according to computer software to model
Slice information, the powder that laser beam is acted under scanning system control in region to be formed, after one layer is scanned, powdering base
Plate declines a thickness distance, and the powder that powder feed system and powdering scraper sprawl a thickness is deposited on molded layer, is repeated
Above-mentioned forming process, until the slicing layer of all threedimensional models is all scanned, removes after excessive powder, obtains forming metal
Part.
Laser fast shaping equipment belongs to precise machining equipment, to laser parameter, automaticity, mechanical movement precision,
Processing environment and human-computer interaction function have very high requirement.Equipment is using metal dust as raw material, and precision of powder laying is to processing zero
Part precision has a major impact.By the shadow of many factors such as motion controller precision, mechanical moving structure backhaul difference and powder diameter
Ring, how to improve and control laser fast shaping equipment precision of powder laying is all the problem for perplexing researcher all the time.
The content of the invention
The technical problems to be solved by the invention：A kind of powdering for laser fast shaping equipment is provided and accurately controls dress
Put and method, control available for the powder feeding of laser fast shaping equipment and powdering process and accurately powder layer thickness, and then raising laser
Rapid forming equipment processes the precision of part.
The technical solution adopted by the present invention：
The present invention proposes a kind of powdering precise control device for laser fast shaping equipment, it is characterized in that：Including
Scraper motion controller, scraper height adjuster, powdering scraper, laser displacement sensor, guide rail, moulding cylinder, powdering substrate, paving
Powder substrate motion controller, powder feeding cylinder, powder feeding substrate, powder feeding substrate motion controller, recovery tank, shaping panel and supporting plate,
The scraper motion controller moves back and forth for linear motion controller and along guide rail under current control；The scraper is highly adjusted
Section device lower surface is connected by screw with scraper motion controller upper surface；The powdering scraper cross section is L-shaped, and it passes through spiral shell
Silk is connected with scraper height adjuster upper surface；The laser displacement sensor is connected by screw with powdering scraper；It is described to lead
Rail is arranged on shaping panel upper surface by screw；The upper end of the powdering substrate motion controller passes through screw and powdering substrate
Connection；The upper end of the powder feeding substrate motion controller passes through screw and powder feeding substrate connection；The powdering substrate is arranged on into
In type cylinder, and powdering substrate edges are contacted by lubricant medium with the casing wall of moulding cylinder, and its casing wall along moulding cylinder moves up and down；
The powder feeding substrate is arranged in powder feeding cylinder, and powder feeding substrate edges are contacted by lubricant medium with the casing wall of powder feeding cylinder, and its edge is sent
The casing wall of powder cylinder moves up and down；Edge is concordant with powdering panel upper surface on the moulding cylinder, powder feeding cylinder and recovery tank, moulding cylinder,
Powder feeding cylinder and recovery tank are connected with shaping panel, and wherein recovery tank is fastenedly connected with shaping panel for detachable；The powdering
Substrate motion controller and powder feeding substrate motion controller are connected by screw with supporting plate respectively；
Wherein scraper motion controller, scraper height adjuster, laser displacement sensor, powdering substrate motion controller and
Powder feeding substrate motion controller is connected with industrial computer.
Further, the scraper motion controller is electronic slide unit, and movement velocity is 100mm/s.
Further, the laser displacement sensor is high accuracy displacement sensor, measuring accuracy<1μm.
Further, the powdering cylinder and powder feeding cylinder are welded on powdering panel.
Further, the powdering cylinder and powder feeding cylinder by screw connection on powdering panel.
Further, the powdering cylinder and powder feeding cylinder are connected with powdering panel fastener respectively.
Further, the powdering substrate motion controller and powder feeding substrate motion controller are electric cylinders, kinematic accuracy<10μ
m。
Further, the recovery tank passes through screw connection with shaping panel.
Further, the recovery tank is connected with shaping panel fastener.
The invention also provides a kind of powdering accuracy control method for laser fast shaping equipment, it is characterized in that：Adopt
With the above-mentioned powdering precise control device for laser fast shaping equipment, one end of guide rail is powder feeding end, the other end of guide rail
To receive powder end, following steps are specifically included：
Step 1: presetting initial position, powdering scraper initial position is located at the powder feeding end of guide rail；Powdering substrate with into
Type panel is concordant；Powder feeding substrate is located at the bottom of powder feeding cylinder；Metal dust, and metal dust top and powdering are filled with powder feeding cylinder
Scraper its lower edge is concordant；
Step 2: powdering substrate declines certain distance under the control of powdering substrate motion controller along the casing wall of moulding cylinder
h1, make powdering upper surface of base plate and powdering scraper its lower edge that there is predetermined vertical range h2；Powdering scraper is now moved in scraper
Moved under the control of controller along guide rail from powder feeding end to powder end is received, when powdering scraper is located at powdering surface, laser displacement
Sensor measures powdering scraper its lower edge and powdering upper surface of base plate actual range, and by the actual range measured and makes a reservation for hang down
Directly apart from h2Between control information pass to industrial computer, industrial computer receive control information be computed it is after analysis that control information is anti-
Powdering of feeding substrate motion controller, while sending the operation for promoting powdering substrate to move up and down to powdering substrate motion controller
Instruction, powdering substrate motion controller receives the control information that industrial computer is sent to and the behaviour for promoting powdering substrate to move up and down
Instruct, and perform, make powdering scraper and powdering substrate actual range and predetermined vertical range h2Error reduce, powdering scraper this
When along guide rail return to powder feeding end under the control of scraper motion controller；Control lower edge of the powdering scraper in scraper motion controller
Guide rail is again from powder feeding end to the movement of powder end is received, and when powdering scraper is located at powdering surface, laser displacement sensor measurement is spread
Powder scraper its lower edge and powdering upper surface of base plate actual range, repeat said process, reduce powdering scraper its lower edge and paving
Powder substrate actual range and predetermined vertical range h2Error；Powder feeding substrate is moved up under the promotion of powder feeding substrate motion controller
One distance, metal dust is released, powdering scraper now under the control of scraper motion controller along guide rail from powder feeding end to
The movement of powder end is received, the metal dust that powder feeding substrate is released is scraped on powdering substrate, uniform one layer of gold of shakedown on powdering substrate
Belong to powder, powdering scraper drives unnecessary metal dust to continue to move to receipts powder end under the control of scraper motion controller along guide rail
It is dynamic, until metal dust falls into recovery tank；According to technological requirement, start laser fast shaping equipment to the metal on powdering substrate
Powder selective scanning, metal powders melt forms part bottom to be processed on powdering substrate；
Step 3: powdering substrate declines certain distance under the control of powdering substrate motion controller along the casing wall of moulding cylinder
h1, powdering scraper is moved under the control of scraper motion controller along guide rail from powder end is received to powder feeding end, on powdering substrate
Metal powder layer upper surface on Fang Shi, laser displacement sensor measurement powdering scraper its lower edge and powdering substrate it is actual away from
From, and by predetermined vertical range h described in the actual range measured and step 22Control information passes to industrial computer；
Step 4: repeat step one arrives step 3, part successively machine-shaping in moulding cylinder, until part is processed
Into.
By above-mentioned design, the present invention can bring following beneficial effect：The present invention proposes a kind of for laser
The powdering precise control device and method of rapid forming equipment, the present invention can be used for the powder feeding of laser fast shaping equipment and powdering mistake
Journey, using laser displacement sensor, distance between accurate measurement powdering scraper and powdering substrate can feed back to laser fast shaping
Equipment industrial computer, calculates and transmits instruction by control software, and industrial computer control scraper motion controller, scraper are highly adjusted
Device, powdering substrate motion controller, powder feeding substrate motion controller, make accurate adjustment, eliminate the backhaul of forming moving mechanism poor
Brought influences different with powdering substrate thickness, so as to accurately control powder layer thickness, and then improve laser fast shaping equipment
Process the precision of part.
Brief description of the drawings
Below in conjunction with brief description of the drawings, the invention will be further described with embodiment：
Fig. 1 is used for the powdering precise control device schematic side view of laser fast shaping equipment for the present invention.
Fig. 2 is used for the powdering precise control device schematic top plan view of laser fast shaping equipment for the present invention.
In figure：1- scrapers motion controller, 2- scrapers height adjuster, 3- powderings scraper, 4- laser displacement sensors, 5-
Guide rail, 6- moulding cylinders, 7- powderings substrate, 8- powdering substrate motions controller, 9- powder feeding cylinders, 10- powder feedings substrate, 11- powder feeding bases
Plate motion controller, 12- recovery tanks, 13- shapings panel, 14- supporting plates.
Embodiment
The present invention proposes a kind of powdering precise control device for laser fast shaping equipment, such as Fig. 1 and Fig. 2 institutes
Show, including scraper motion controller 1, scraper height adjuster 2, powdering scraper 3, laser displacement sensor 4, guide rail 5, moulding cylinder
6th, powdering substrate 7, powdering substrate motion controller 8, powder feeding cylinder 9, powder feeding substrate 10, powder feeding substrate motion controller 11, recovery
Cylinder 12, shaping panel 13 and supporting plate 14, the scraper motion controller 1 is for linear motion controller and in current control lower edge
Guide rail 5 is moved back and forth；The lower surface of scraper height adjuster 2 is connected by screw with the upper surface of scraper motion controller 1；Institute
The cross section of powdering scraper 3 is stated for L-shaped, it is connected by screw with the upper surface of scraper height adjuster 2；The laser displacement sensing
Device 4 is connected by screw with powdering scraper 3；The guide rail 5 is arranged on shaping panel 13 upper surface by screw；The powdering base
The upper end of plate motion controller 8 is connected by screw with powdering substrate 7；The upper end of the powder feeding substrate motion controller 11 passes through
Screw is connected with powder feeding substrate 10；The powdering substrate 7 is arranged in moulding cylinder 6, and the edge of powdering substrate 7 passes through lubricant medium
Contacted with the casing wall of moulding cylinder 6, its casing wall along moulding cylinder 6 moves up and down；The powder feeding substrate 10 is arranged in powder feeding cylinder 9,
The edge of powder feeding substrate 10 is contacted by lubricant medium with the casing wall of powder feeding cylinder 9, and its casing wall along powder feeding cylinder 9 moves up and down；It is described
Along, moulding cylinder 6, powder feeding cylinder 9 and recovery tank 12 concordant with the upper surface of powdering panel 13 on moulding cylinder 6, powder feeding cylinder 9 and recovery tank 12
It is connected with shaping panel 13, wherein recovery tank 12 is fastenedly connected with shaping panel 13 for detachable；The powdering substrate motion
Controller 8 and powder feeding substrate motion controller 11 are connected by screw with supporting plate 14 respectively；
Wherein scraper motion controller 1, scraper height adjuster 2, laser displacement sensor 4, the control of powdering substrate motion
Device 8 and powder feeding substrate motion controller 11 are connected with industrial computer.
The scraper motion controller 1 is electronic slide unit, and movement velocity is 100mm/s.
The laser displacement sensor 4 is high accuracy displacement sensor, measuring accuracy<1μm.
The powdering cylinder 6 and powder feeding cylinder 9 are welded on powdering panel 13.
The powdering cylinder 6 and powder feeding cylinder 9 are by screw connection on powdering panel 13.
The powdering cylinder 6 and powder feeding cylinder 9 are snapped connection with powdering panel 13 respectively.
The powdering substrate motion controller 8 and powder feeding substrate motion controller 11 are electric cylinders, kinematic accuracy<10μm.
The recovery tank 12 passes through screw connection with shaping panel 13.
The recovery tank 12 is snapped connection with shaping panel 13.
The shaping panel 13 is connected with laser fast shaping equipment supporter, and scraper motion controller 1, scraper are highly adjusted
Section device 2, powdering scraper 3, laser displacement sensor 4, guide rail 5, moulding cylinder 6, powder feeding cylinder 9 and recovery tank 12 play a supportive role.
The supporting plate 14 is connected with laser fast shaping equipment supporter, to powdering substrate 7, powdering substrate motion controller
8th, powder feeding substrate 10 and powder feeding substrate motion controller 11 play a supportive role.
For the powdering accuracy control method of laser fast shaping equipment, laser fast shaping equipment is used for using above-mentioned
Powdering precise control device, one end of its middle guide 5 is powder feeding end, and the other end of guide rail 5 is specifically included following to receive powder end
Step：
Step 1: presetting initial position, the initial position of powdering scraper 3 is located at the powder feeding end of guide rail 5；Powdering substrate 7
It is concordant with shaping panel 13；Powder feeding substrate 10 is located at the bottom of powder feeding cylinder 9；Metal dust is filled with powder feeding cylinder 9, is scraped by regulation
Knife height adjuster 2, metal dust top is concordant with its lower edge of powdering scraper 3；
Step 2: powdering substrate 7 declines necessarily under the control of powdering substrate motion controller 8 along the casing wall of moulding cylinder 6
Apart from h1, make the upper surface of powdering substrate 7 and its lower edge of powdering scraper 3 that there is predetermined vertical range h2；Powdering scraper 3 now exists
Moved under the control of scraper motion controller 1 along guide rail 5 from powder feeding end to powder end is received, powdering scraper 3 is located at the top of powdering substrate 7
When, its lower edge of the measurement of laser displacement sensor 4 powdering scraper 3 and the upper surface actual range of powdering substrate 7, and by the reality measured
Border distance and predetermined vertical range h2Between control information pass to industrial computer, industrial computer receives control information and is computed analysis
Control information is fed back into powdering substrate motion controller 8 afterwards, powdering base is promoted while being sent to powdering substrate motion controller 8
The operational order that plate 7 is moved up and down, powdering substrate motion controller 8 receives control information and the promotion paving that industrial computer is sent to
The operational order that powder substrate 7 is moved up and down, and perform, make powdering scraper 3 and the actual range of powdering substrate 7 and predetermined vertical range
h2Error reduces, and powdering scraper 3 now returns to powder feeding end under the control of scraper motion controller 1 along guide rail 5；Powdering scraper 3
Moved again from powder feeding end to powder end is received along guide rail 5 under the control of scraper motion controller 1, powdering scraper 3 is located at powdering base
During 7 top of plate, its lower edge of the measurement powdering of laser displacement sensor 4 scraper 3 and the upper surface actual range of powdering substrate 7 are repeated
Said process, reduces its lower edge of powdering scraper 3 and the actual range of powdering substrate 7 and predetermined vertical range h2Error；Powder feeding base
Plate 10 moves up a distance under the promotion of powder feeding substrate motion controller 11, metal dust is released, powdering scraper 3 is now
Moved under the control of scraper motion controller 1 along guide rail 5 from powder feeding end to powder end is received, the metal powder that powder feeding substrate 10 is released
End is scraped on powdering substrate 7, the uniform shakedown layer of metal powder on powdering substrate 7, and powdering scraper 3 is in scraper motion controller
Unnecessary metal dust is driven to continue to move to receipts powder end along guide rail 5 under 1 control, until metal dust falls into recovery tank 12；Press
According to technological requirement, start laser fast shaping equipment to the metal dust selective scanning on powdering substrate 7, metal dust melts
Melt, part bottom to be processed is formed on powdering substrate 7；
Step 3: powdering substrate 7 declines necessarily under the control of powdering substrate motion controller 8 along the casing wall of moulding cylinder 6
Apart from h1, powdering scraper 3 is moved under the control of scraper motion controller 1 along guide rail 5 from powder end is received to powder feeding end, positioned at powdering
During 7 top of substrate, its lower edge of the measurement powdering of laser displacement sensor 4 scraper 3 and the metal powder layer upper table on powdering substrate 7
Face actual range, and by predetermined vertical range h described in the actual range measured and step 22Control information passes to industry control
Machine；
Step 4: repeat step one arrives step 3, part successively machine-shaping in moulding cylinder 6, until part is processed
Into.
In above-mentioned process, the upper surface of powdering substrate 7 is predetermined vertical with its lower edge of powdering scraper 3 when work starts
Apart from h2With powdering substrate 7 decline every time apart from h1It is important parameter, h under normal circumstances1=h2=h, its precision is to paving
The precision of powder thickness has material impact, and then has material impact to the overall precision of part.
H in the embodiment of the present invention1=h2=h, controls h precision, and then precision of powder laying is entered using laser displacement sensor 4
The accurate control of row.Laser displacement sensor 4 uses screw connection with the powdering scraper 3, can accurately measure the lower end of powdering scraper 3
Blade and the upper surface distance of powdering substrate 7, and both depth of parallelisms, can give laser fast shaping equipment by the information transmission of measurement
Industrial computer, calculated and transmitted by software and instruct, powdering substrate 7 is controlled along moulding cylinder 6 by powdering substrate motion controller 8
Accurate movement, improves h precision up and down.
The laser displacement sensor 4 can also be accurate to survey under powdering scraper 3 in the laser fast shaping equipment course of work
Terminal knife edge and the distance for processing each formable layer face of part, pass to industrial computer, are calculated by software, and dynamic adjustment is each
During layer powdering powdering substrate 7 decline apart from h, accurately control precision of powder laying, optimization part machining path and scheme enter one
Step improves part processing precision.
By the above-mentioned means, powder layer thickness is controlled available for the powder feeding of laser fast shaping equipment and powdering process and accurately,
And then improve the precision that laser fast shaping equipment processes part.
Above-described embodiment is only the method and beneficial effect of the illustrative present invention, not for the limitation present invention.Appoint
What is familiar with the personage of the method can be modified under the spirit and scope without prejudice to the present invention to above-described embodiment.Therefore
The scope of the present invention, should be as listed by claim.
Claims (10)
1. for the powdering precise control device of laser fast shaping equipment, it is characterized in that：Including scraper motion controller (1),
Scraper height adjuster (2), powdering scraper (3), laser displacement sensor (4), guide rail (5), moulding cylinder (6), powdering substrate
(7), powdering substrate motion controller (8), powder feeding cylinder (9), powder feeding substrate (10), powder feeding substrate motion controller (11), recovery
Cylinder (12), shaping panel (13) and supporting plate (14), the scraper motion controller (1) is for linear motion controller and in electric current
Moved back and forth under control along guide rail (5)；Scraper height adjuster (2) lower surface passes through screw and scraper motion controller
(1) upper surface is connected；Powdering scraper (3) cross section is L-shaped, and it passes through screw and scraper height adjuster (2) upper surface
Connection；The laser displacement sensor (4) is connected by screw with powdering scraper (3)；The guide rail (5) is arranged on by screw
It is molded panel (13) upper surface；The upper end of the powdering substrate motion controller (8) is connected by screw with powdering substrate (7)；
The upper end of the powder feeding substrate motion controller (11) is connected by screw with powder feeding substrate (10)；The powdering substrate (7) sets
Put in the moulding cylinder (6), and powdering substrate (7) edge is contacted by lubricant medium with the casing wall of moulding cylinder (6), it is along moulding cylinder
(6) casing wall moves up and down；The powder feeding substrate (10) is arranged in powder feeding cylinder (9), and powder feeding substrate (10) edge passes through lubrication
Medium is contacted with the casing wall of powder feeding cylinder (9), and its casing wall along powder feeding cylinder (9) moves up and down；The moulding cylinder (6), powder feeding cylinder (9)
And along concordant with powdering panel (13) upper surface on recovery tank (12), moulding cylinder (6), powder feeding cylinder (9) and recovery tank (12) with
Panel (13) connection is molded, wherein recovery tank (12) is fastenedly connected with shaping panel (13) for detachable；The powdering substrate fortune
Movement controller (8) and powder feeding substrate motion controller (11) are connected by screw with supporting plate (14) respectively；
Wherein scraper motion controller (1), scraper height adjuster (2), laser displacement sensor (4), powdering substrate motion control
Device (8) processed and powder feeding substrate motion controller (11) are connected with industrial computer.
2. the powdering precise control device according to claim 1 for laser fast shaping equipment, it is characterized in that：It is described
Scraper motion controller (1) is electronic slide unit, and movement velocity is 100mm/s.
3. it is used for the powdering precise control device of laser fast shaping equipment according to claim 1, it is characterized in that：It is described to swash
Optical displacement sensor (4) is high accuracy displacement sensor, measuring accuracy<1μm.
4. the powdering precise control device according to claim 1 for laser fast shaping equipment, it is characterized in that：It is described
Powdering cylinder (6) and powder feeding cylinder (9) are welded on powdering panel (13).
5. the powdering precise control device according to claim 1 for laser fast shaping equipment, it is characterized in that：It is described
Powdering cylinder (6) and powder feeding cylinder (9) are by screw connection on powdering panel (13).
6. the powdering precise control device according to claim 1 for laser fast shaping equipment, it is characterized in that：It is described
Powdering cylinder (6) and powder feeding cylinder (9) are snapped connection with powdering panel (13) respectively.
7. the powdering precise control device according to claim 1 for laser fast shaping equipment, it is characterized in that：It is described
Powdering substrate motion controller (8) and powder feeding substrate motion controller (11) are electric cylinders, kinematic accuracy<10μm.
8. the powdering precise control device according to claim 1 for laser fast shaping equipment, it is characterized in that：It is described
Recovery tank (12) passes through screw connection with shaping panel (13).
9. the powdering precise control device according to claim 1 for laser fast shaping equipment, it is characterized in that：It is described
Recovery tank (12) is snapped connection with shaping panel (13).
10. for the powdering accuracy control method of laser fast shaping equipment, it is characterized in that：Appoint using in such as claim 1-9
The powdering precise control device for laser fast shaping equipment described in meaning one, one end of guide rail (5) is powder feeding end, guide rail
(5) the other end specifically includes following steps to receive powder end：
Step 1: presetting initial position, powdering scraper (3) initial position is located at the powder feeding end of guide rail (5)；Powdering substrate
(7) it is concordant with shaping panel (13)；Powder feeding substrate (10) is located at the bottom of powder feeding cylinder (9)；Metal powder is filled with powder feeding cylinder (9)
End, and metal dust top is concordant with powdering scraper (3) its lower edge；
Step 2: powdering substrate (7) declines one under the control of powdering substrate motion controller (8) along the casing wall of moulding cylinder (6)
Set a distance h1, make powdering substrate (7) upper surface and powdering scraper (3) its lower edge that there is predetermined vertical range h2；Powdering scraper
(3) now moved under the control of scraper motion controller (1) along guide rail (5) from powder feeding end to powder end is received, powdering scraper (3) position
When above powdering substrate (7), laser displacement sensor (4) measurement powdering scraper (3) its lower edge and powdering substrate (7) upper table
Face actual range, and by the actual range measured and predetermined vertical range h2Between control information pass to industrial computer, industry control
Machine is received after control information is computed analysis feeds back to powdering substrate motion controller (8) by control information, while to powdering base
Plate motion controller (8) sends the operational order for promoting powdering substrate (7) to move up and down, and powdering substrate motion controller (8) connects
The control information that industrial computer is sent to and the operational order for promoting powdering substrate (7) to move up and down are received, and is performed, powdering is scraped
Knife (3) and powdering substrate (7) actual range and predetermined vertical range h2Error reduces, and powdering scraper (3) is now moved in scraper
Under the control of controller (1) powder feeding end is returned to along guide rail (5)；Control lower edge of the powdering scraper (3) in scraper motion controller (1)
Guide rail (5) is again from powder feeding end to the movement of powder end is received, and when powdering scraper (3) is located above powdering substrate (7), laser displacement is sensed
Device (4) measures powdering scraper (3) its lower edge and powdering substrate (7) upper surface actual range, repeats said process, reduces powdering
Scraper (3) its lower edge and powdering substrate (7) actual range and predetermined vertical range h2Error；Powder feeding substrate (10) is in powder feeding base
Plate motion controller (11) moves up a distance under promoting, and metal dust is released, and powdering scraper (3) is now transported in scraper
Moved under the control of movement controller (1) along guide rail (5) from powder feeding end to powder end is received, the metal dust that powder feeding substrate (10) is released
Scrape on powdering substrate (7), the uniform shakedown layer of metal powder on powdering substrate (7), powdering scraper (3) is moved in scraper to be controlled
Unnecessary metal dust is driven to continue to the movement of powder end is received, until metal dust falls into recovery along guide rail (5) under device (1) control processed
Cylinder (12)；According to technological requirement, start laser fast shaping equipment to the metal dust selective scanning on powdering substrate (7),
Metal powders melt, forms part bottom to be processed on powdering substrate (7)；
Step 3: powdering substrate (7) declines one under the control of powdering substrate motion controller (8) along the casing wall of moulding cylinder (6)
Set a distance h1, powdering scraper (3) movement along guide rail (5) from receipts powder end to powder feeding end under scraper motion controller (1) control,
When above powdering substrate (7), on laser displacement sensor (4) measurement powdering scraper (3) its lower edge and powdering substrate (7)
Metal powder layer upper surface actual range, and by predetermined vertical range h described in the actual range measured and step 22Error
Information transmission is to industrial computer；
Step 4: repeat step one arrives step 3, part successively machine-shaping in moulding cylinder (6), until part is machined.
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