CN206392864U - A kind of double-pole two-way powder laying device for selective laser melting unit - Google Patents
A kind of double-pole two-way powder laying device for selective laser melting unit Download PDFInfo
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- CN206392864U CN206392864U CN201720054655.6U CN201720054655U CN206392864U CN 206392864 U CN206392864 U CN 206392864U CN 201720054655 U CN201720054655 U CN 201720054655U CN 206392864 U CN206392864 U CN 206392864U
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- storing machine
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- 239000000843 powder Substances 0.000 title claims abstract description 152
- 238000002844 melting Methods 0.000 title claims abstract description 27
- 230000008018 melting Effects 0.000 title claims abstract description 27
- 235000012054 meals Nutrition 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 claims abstract description 6
- 238000010168 coupling process Methods 0.000 claims abstract description 6
- 238000005859 coupling reaction Methods 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000000227 grinding Methods 0.000 abstract description 31
- 239000002184 metal Substances 0.000 description 24
- 239000000428 dust Substances 0.000 description 17
- 230000007480 spreading Effects 0.000 description 11
- 238000003892 spreading Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000016507 interphase Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002114 biscuit porcelain Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Abstract
The utility model discloses a kind of double-pole two-way powder laying device for selective laser melting unit, including：Airtight cavity and the forming cavity in the airtight cavity, the first guide rail and the second guide rail is distributed with the forming cavity both sides, powder-storing machine is connected with first guide rail and the second guide rail, powder input port is offered above the powder-storing machine, automatic switch device is installed at the powder input port, the first scraper and the second scraper is fixedly mounted by the first scraper pressing plate and the second scraper pressing plate respectively in the powder-storing machine two ends, meal outlet is offered below the powder-storing machine, powder feeding floral whorl is installed between the storing space of the powder-storing machine and the meal outlet, the powder feeding floral whorl is connected by shaft coupling with servomotor.The double-pole two-way powder laying device for melting equipment for selective laser of the utility model offer, can realize quantitative powder feeding, and two-way powder laying adds powder automatically, shortens powdering and adds the time of powder, greatly there is provided operating efficiency.
Description
Technical field
The utility model is related to increasing material manufacturing research field, more particularly to a kind of pair for melting equipment for selective laser
Knife two-way powder laying device.
Background technology
The rapid shaping technique for manufacturing metal function part using metal dust is selective laser fusing (SLM), is metal
A kind of method of part straight forming, is the latest development of rapid shaping technique.Selective laser is melted and molded system and generally utilizes paving
Powder mode ensures the levelness and homogeneity question of metal bisque, thus, powdering be selective laser fusing important step it
One, the quality of powdering effect directly affects forming parts quality.
At present, selective laser melting unit can be divided into two kinds of unidirectional powdering and two-way powder laying according to powdering mode.Unidirectional paving
Powder equipment uses twin-tub form mostly, and equipment volume is very huge too fat to move, and before each powdering, scraper is firstly the need of fortune
Move to initial position, then perform powdering action, at this moment scraper is needed across two cylinders, and simply shot, this list
It is low to powdering mode efficiency, expend the time long.Now, some selective laser melting units are had begun to using more efficient pair
To power spreading device, this kind equipment only retains a formation cylinder, and power spreading device carries out two-pass powdering." laser is selected Chinese patent
Melt hilted broadsword two-way powder laying device and selective laser melting unit (A of publication number CN 105921748) in area " provide a kind of laser
Selective melting hilted broadsword two-way powder laying device, by the powder feeding bar on power spreading device and the ejector pin contact of forming room's side wall, in power
The lower compression spring of effect simultaneously promotes powder feeding plate metal dust is realized whereabouts under gravity, and the arrangement achieves a scraper
The function of two-way powder laying can be completed, equipment cost is reduced, but the mechanical structure due to device in itself determines to be difficult to accomplish
Quantitative powder feeding, and by mechanical collision influenceed to cause changing for scraper height and setting angle as powder feeding bar is prolonged
Become, influence powdering quality.A kind of Chinese patent " two-way powder laying device and selective laser melting unit (publication number CN
106111990 A) " a kind of selective laser fusing two-way powder laying device is provided, solve existing two-way powder laying device leveling not side
Just and the problem of leveling precision is difficult to ensure that, but the problem of the device has uncontrollable powdering amount and bad seal.
During metal 3D printing, during the interphase interaction of laser and metal dust, due to its unstability sometimes
Splash even spherodization occurs, causes molded surface of poor quality.In the unidirectional power spreading device running of single scraper, paving
Scraper meeting scratch powdering layer during powder, produces cut in powdering layer and even groove mark occurs, seriously reduce powdering quality, cause powdering
Effect is poor.Simultaneously existing most of selective laser thawing equipment can not all be realized adds powder automatically to powder feeding cylinder or Chu Fenqu,
After each powder feeding cylinder or Chu Fenqu metal dust are finished, equipment needs break-off or opening equipment hatch door manually to add
Metal dust, is then further continued for processing, so not only processing efficiency is low, and complex operation, cumbersome.
Utility model content
The purpose of this utility model is to provide a kind of double-pole two-way powder laying device for melting equipment for selective laser, to solve
The problem of certainly above-mentioned prior art is present, can realize quantitative powder feeding, and two-way powder laying adds powder, shortens powdering and plus powder automatically
Time, greatly there is provided operating efficiency.
To achieve the above object, the utility model provides following technical scheme：
The utility model provides a kind of double-pole two-way powder laying device for selective laser melting unit, including：Closed chamber
The first guide rail and the second guide rail, described is distributed with body and the forming cavity in the airtight cavity, the forming cavity both sides
It is connected with one guide rail and the second guide rail above powder-storing machine, the powder-storing machine and offers powder input port, is installed at the powder input port
There is automatic switch device, the powder-storing machine two ends are fixedly mounted first by the first scraper pressing plate and the second scraper pressing plate respectively and scraped
Meal outlet is offered below knife and the second scraper, the powder-storing machine, between the storing space of the powder-storing machine and the meal outlet
Powder feeding floral whorl is installed, the powder feeding floral whorl is connected by shaft coupling with servomotor.
Optionally, in addition to powder quantity regulating device, the powder is connected with quantity regulating device upper end for powder cabin, under
End is provided with connecting tube, the connecting tube and is arranged with telescoping tube, the telescoping tube be fixedly connected with bindiny mechanism and with it is described
Powder input port is connected, and is fixed with motor in the bindiny mechanism, the confession powder cabin upper end is provided with fast-assembling butterfly valve.
Optionally, it is provided with the confession powder cabin on the first powder headroom sensor, the powder-storing machine and is provided with the second powder
Last headroom sensor, the first powder headroom sensor and the second powder headroom sensor are connected to controller.
Optionally, the forming cavity is provided at both ends with the first recovery chamber and second reclaims chamber, and described first reclaims chamber and institute
The second recovery chamber is stated to be located between first guide rail and second guide rail.
Optionally, the powder-storing machine two ends are connected to the first connecting plate and the second connecting plate, first connecting plate
It is connected respectively by mobile sliding block with first guide rail and second guide rail with second connecting plate.
Optionally, the mobile sliding block is connected with linear electric motors, the linear electric motors control mobile sliding block movement.
Optionally, it is uniform on the circumference of the powder feeding floral whorl to be placed with flower-shape groove, and the powder feeding floral whorl is cylindrical and institute
State circular arc inside powder-storing machine tangent.
Optionally, the section of the flower-shape groove is semicircle, triangle, rectangle or pentagon.
Optionally, the automatic switch device is connected with push-pull electromagnet, and the push-pull electromagnet control is described certainly
The opening and closing of dynamic opening and closing device.
What the utility model was provided is used for the double-pole two-way powder laying device of selective laser thawing equipment compared with prior art
With following technique effect：
1st, the utility model is using double scraper two-way powder laying designs, along the direction of powdering during powdering, in powder-storing machine front end
The scraper eliminating impurities that will can be produced due to the interphase interaction unstability of laser and powder, it is ensured that powdering is smoothly entered
The uniformity of row and powdering thickness, improves the compactness of powdering, and then improves forming parts quality, while realizing double
To the purpose of powdering, efficiency is improved.
2nd, the utility model uses the powder feeding floral whorl with flower-shape groove, controls to send by the anglec of rotation of servomotor
The rotational angle of pink blossom wheel, realizes accurate quantitatively supplying powder, reduces powder and wastes, improves powder utilization rate, be that powder compacting is carried
Supply to ensure.
3rd, the utility model is designed with adds powder function automatically, and the metal dust for solving each powder feeding cylinder or Chu Fenqu is used
Complete rear equipment needs break-off or opens the problem of equipment hatch door manually adds metal dust, eliminates the auxiliary of artificial plus powder
Help the time, and the feature operation is convenient, simple, automaticity is high, substantially increases processing efficiency.
4th, unnecessary powder feeding is reclaimed chamber by the utility model, greatly reduces the waste of material, and the device
Powder is in closed system during powdering, the motion surface in forming room is not polluted, it is ensured that clean in equipment
Working environment.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
In required for the accompanying drawing that uses be briefly described, it should be apparent that, drawings in the following description are only of the present utility model
Some embodiments, for those of ordinary skill in the art, without having to pay creative labor, can also basis
These accompanying drawings obtain other accompanying drawings；
Fig. 1 is the structural representation for the double-pole two-way powder laying device that the utility model is used for selective laser melting unit；
Fig. 2 is the top view for the double-pole two-way powder laying device that the utility model is used for selective laser melting unit；
Fig. 3 is the different shape schematic diagram of the utility model powder feeding floral whorl end face；
Description of reference numerals：1 is the first recovery chamber, and 2 be substrate, and 3 be forming cavity, and 4 be the first scraper, and 5 be the first scraper
Pressing plate, 6 be airtight cavity, and 7 be automatic switch device, and 8 be sealing ring, and 9 be telescoping tube, and 10 be powder input port, and 11 be fast-assembling butterfly valve,
12 be that, for powder cabin, 13 be metal dust, and 14 be the first powder headroom sensor, and 15 be powder quantity regulating device, and 16 be connection
Pipe, 17 be motor, and 18 be bindiny mechanism, and 19 be powder-storing machine, and 20 be the second powder headroom sensor, and 21 be the second scraper pressure
Plate, 22 be screw, and 23 be the second scraper, and 24 be powder feeding floral whorl, and 25 be the second recovery chamber, and 26 be the first guide rail, and 27 lead for second
Rail, 28 be the first connecting plate, and 29 be the second connecting plate, and 30 be linear electric motors, and 31 be shaft coupling, and 32 be servomotor.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
The purpose of this utility model is to provide a kind of double-pole two-way powder laying device for melting equipment for selective laser, to solve
The problem of certainly above-mentioned prior art is present, can realize quantitative powder feeding, and two-way powder laying adds powder, shortens powdering and plus powder automatically
Time, greatly there is provided operating efficiency.
The utility model provides a kind of double-pole two-way powder laying device for selective laser melting unit, including：Closed chamber
The first guide rail and the second guide rail, described is distributed with body and the forming cavity in the airtight cavity, the forming cavity both sides
It is connected with one guide rail and the second guide rail above powder-storing machine, the powder-storing machine and offers powder input port, is installed at the powder input port
There is automatic switch device, the powder-storing machine two ends are fixedly mounted first by the first scraper pressing plate and the second scraper pressing plate respectively and scraped
Meal outlet is offered below knife and the second scraper, the powder-storing machine, between the storing space of the powder-storing machine and the meal outlet
Powder feeding floral whorl is installed, the powder feeding floral whorl is connected by shaft coupling with servomotor.
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings and tool
Body embodiment is described in further detail to the utility model.
The utility model provides a kind of double-pole two-way powder laying device for selective laser melting unit, such as Fig. 1 and Fig. 2 institutes
Show, including：Airtight cavity 6 and forming cavity 3 and powder quantity regulating device 15 in the airtight cavity 6, it is described into
The both sides of die cavity 6 are distributed with the first guide rail 26 and the second guide rail 27, the guide rail 27 of the first guide rail 26 and second and are connected with storage powder
Device 19, the two ends of powder-storing machine 19 are connected to the first connecting plate 28 and the second connecting plate 29, the He of the first connecting plate 28
Second connecting plate 29 is connected by mobile sliding block with first guide rail 26 and second guide rail 27 respectively, the movement
Sliding block is connected with linear electric motors 30, and the linear electric motors 30 control the mobile sliding block movement, and the top of the powder-storing machine 19 is opened
Provided with powder input port 10, automatic switch device 7 is installed at the powder input port 10, the automatic switch device 7 is connected with plug-type
Electromagnet, the push-pull electromagnet controls the opening and closing of the automatic switch device 7, and the two ends of powder-storing machine 19 are respectively by the
The first scraper 4 and the second scraper 23 is fixedly mounted in one scraper pressing plate 5 and the second scraper pressing plate 21, and the lower section of powder-storing machine 19 is opened up
There is meal outlet, powder feeding floral whorl 24, the powder feeding floral whorl are installed between the storing space of the powder-storing machine 19 and the meal outlet
24 are connected by shaft coupling 31 with servomotor 32；The powder is connected with the upper end of quantity regulating device 15 for powder cabin 12, lower end
It is provided with connecting tube 16, the connecting tube 16 and is provided with sealing ring 8, telescoping tube 9 is arranged with the connecting tube 16, it is described to stretch
The draw 9 is fixedly connected with bindiny mechanism 18 and connected with the powder input port 10, and motor is fixed with the bindiny mechanism 18
17, the upper end of confession powder cabin 12 is provided with fast-assembling butterfly valve 11.
Further, it is provided with the first powder headroom sensor 14, the powder-storing machine 19 and sets on the confession powder cabin 12
There is the second powder headroom sensor 20, the first powder headroom sensor 14 and the second powder headroom sensor 20 are distinguished
It is electrically connected with the controller；The forming cavity 3 is provided at both ends with the first recovery chamber 1 and second and reclaims chamber 25, and described first reclaims chamber 1
And the second recovery chamber 25 is located between first guide rail 26 and second guide rail 27；As shown in figure 3, the powder feeding flower
It is uniform on the circumference of wheel 24 to be placed with flower-shape groove, the section of the flower-shape groove can for semicircle, triangle, rectangle or
Pentagon.
When the double-pole two-way powder laying device for selective laser melting unit that the utility model is provided brings into operation, straight line
Motor 30 first can drive power spreading device to reach zero-bit.At this moment, controller meeting basis is arranged on more than the second powder in powder-storing machine 19
Quantity sensor 20 judges the metal dust surplus in powder-storing machine 19, if fewer than the value of setting, can feed back to control zone and point out
Automatically powder unit is added to need to the inner addition metal dust of powder-storing machine 19.Simultaneously also can be according to the first powder in for powder cabin 12
Last headroom sensor 14 is judged for the metal dust surplus in powder cabin 12, if powder surplus can feed back to less than the value of setting
Simultaneously point out to for the inner addition metal dust in powder cabin 12 control zone.Before ensureing that the powder surplus in powder-storing machine 19 is more than setting value
Put, power spreading device moves to the position set in advance under the drive of linear electric motors 30, according to SLM molding thicknesses in controller
On be configured, be provided with rear controller and send instructions to servomotor 32 and complete corresponding angular deflection, servomotor 32
Deflection drive powder feeding floral whorl 24 to rotate work of the metal dust on certain angle, powder feeding floral whorl 24 in flower-shape groove in gravity
Freely fallen with the lower meal outlet by the lower end of powder-storing machine 19, then linear electric motors 30 drive power spreading device to carry out powdering.Pawnshop
While powder device completes powdering, unnecessary metal dust can be sent into back along scraper of the powdering direction in the front end of powder-storing machine 19
Receive chamber.Followed by laser beam is scanned by light path system in forming area face according to the figure set on controller,
While laser scanning pattern, power spreading device counter motion under the drive of linear electric motors 30, to the position set in advance, is watched
The deflection for taking motor 32 drives powder feeding floral whorl 24 to rotate certain angle, and metal dust passes through powder-storing machine 19 under gravity
The meal outlet of lower end is freely fallen.After the completion of laser scanning, linear electric motors 30 drive power spreading device to carry out powdering.When powdering dress
While putting completion powdering, unnecessary metal dust can be sent into and reclaimed along scraper of the powdering direction in the front end of powder-storing machine 19
Chamber.Then laser beam is scanned by light path system in forming area face according to the figure set on controller, until
Scanning is completed.So, power spreading device one just completes two-way powder laying action back and forth.So above step is reruned until beating
Printed document is molded.
If among process, because printout volume is larger, run into amount of powder in powder-storing machine 19 it is inadequate when, second
Powder headroom sensor 20 can give controller feedback, and point out to add powder unit to need to the inner addition metal powder of powder-storing machine 19 automatically
End.Now, linear electric motors 30 drive power spreading device to reach the position for adding powder automatically.Then storage will be added to by setting on the controller
The value of the metal dust of powder device 19, after setting, automatic switch device 7 is opened, and powder-storing machine powder input port is revealed, telescoping tube 9
The position set in advance is moved down under the drive of motor 17, then powder quantity regulating device 15 is opened, metal
Powder enters powder-storing machine 19 by powder quantity regulating device 15, connecting tube 16 and telescoping tube 9, when the metal for entering powder-storing machine 19
Amount of powder reaches after setting value that powder quantity regulating device 15 is closed, and then telescoping tube 9, which is moved up, rises to original position
Put, automatic switch device 7 is closed.Then, then it is processed.
Apply specific case in this specification to be set forth principle of the present utility model and embodiment, the above is real
The explanation for applying example is only intended to help and understands method of the present utility model and its core concept；Simultaneously for the general of this area
Technical staff, according to thought of the present utility model, will change in specific embodiments and applications.To sum up institute
State, this specification content should not be construed as to limitation of the present utility model.
Claims (9)
1. a kind of double-pole two-way powder laying device for selective laser melting unit, it is characterised in that：Including airtight cavity and position
The first guide rail and the second guide rail, first guide rail is distributed with forming cavity in the airtight cavity, the forming cavity both sides
Powder input port is offered with being connected with the second guide rail above powder-storing machine, the powder-storing machine, is provided with the powder input port automatic
The first scraper and the is fixedly mounted by the first scraper pressing plate and the second scraper pressing plate respectively in opening and closing device, the powder-storing machine two ends
Meal outlet is offered below two scrapers, the powder-storing machine, is provided between the storing space of the powder-storing machine and the meal outlet
Powder feeding floral whorl, the powder feeding floral whorl is connected by shaft coupling with servomotor.
2. the double-pole two-way powder laying device according to claim 1 for selective laser melting unit, it is characterised in that：Also
Including powder quantity regulating device, the powder is connected with quantity regulating device upper end for powder cabin, and lower end is provided with connecting tube, institute
State and telescoping tube is arranged with connecting tube, the telescoping tube is fixedly connected with bindiny mechanism and connected with the powder input port, the company
Motor is fixed with connection mechanism, the confession powder cabin upper end is provided with fast-assembling butterfly valve.
3. the double-pole two-way powder laying device according to claim 2 for selective laser melting unit, it is characterised in that：Institute
State and be provided with the second powder headroom sensor for being provided with powder cabin on the first powder headroom sensor, the powder-storing machine, it is described
First powder headroom sensor and the second powder headroom sensor are connected to controller.
4. the double-pole two-way powder laying device according to claim 2 for selective laser melting unit, it is characterised in that：Institute
State forming cavity and be provided at both ends with the first recovery chamber and the second recovery chamber, described first, which reclaims chamber and described second, reclaims chamber positioned at institute
State between the first guide rail and second guide rail.
5. the double-pole two-way powder laying device according to claim 2 for selective laser melting unit, it is characterised in that：Institute
State powder-storing machine two ends and be connected to the first connecting plate and the second connecting plate, first connecting plate and second connecting plate point
It is not connected by mobile sliding block with first guide rail and second guide rail.
6. the double-pole two-way powder laying device according to claim 5 for selective laser melting unit, it is characterised in that：Institute
State mobile sliding block and be connected with linear electric motors, the linear electric motors control mobile sliding block movement.
7. the double-pole two-way powder laying device according to claim 1 for selective laser melting unit, it is characterised in that：Institute
State on the circumference of powder feeding floral whorl it is uniform be placed with flower-shape groove, and the powder feeding floral whorl is cylindrical with powder-storing machine inside circular arc phase
Cut.
8. the double-pole two-way powder laying device according to claim 7 for selective laser melting unit, it is characterised in that：Institute
The section for stating flower-shape groove is semicircle, triangle, rectangle or pentagon.
9. the double-pole two-way powder laying device according to claim 1 for selective laser melting unit, it is characterised in that：Institute
State automatic switch device and be connected with push-pull electromagnet, the push-pull electromagnet controls the opening and closing of the automatic switch device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720054655.6U CN206392864U (en) | 2017-01-18 | 2017-01-18 | A kind of double-pole two-way powder laying device for selective laser melting unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720054655.6U CN206392864U (en) | 2017-01-18 | 2017-01-18 | A kind of double-pole two-way powder laying device for selective laser melting unit |
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| CN201720054655.6U Expired - Fee Related CN206392864U (en) | 2017-01-18 | 2017-01-18 | A kind of double-pole two-way powder laying device for selective laser melting unit |
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| CN107626921A (en) * | 2017-09-26 | 2018-01-26 | 芜湖天梦信息科技有限公司 | Melt equipment in a kind of selective laser |
| CN107695354A (en) * | 2017-11-13 | 2018-02-16 | 黎硕三维科技发展（上海）有限公司 | A kind of powder supplying mechanism of laser sintered equipment |
| CN108000869A (en) * | 2017-12-13 | 2018-05-08 | 华侨大学 | A kind of power spreading device suitable for selective laser sintering and moulding |
| CN108080639A (en) * | 2018-01-30 | 2018-05-29 | 宁波蓝野医疗器械有限公司 | Melt rapidly pre-warming power spreading device in a kind of selective laser |
| CN108273998A (en) * | 2018-02-24 | 2018-07-13 | 广州华钛三维材料制造有限公司 | Melt hilted broadsword two-way powder laying device and selective laser melting unit in selective laser |
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| CN110548868A (en) * | 2018-06-04 | 2019-12-10 | 陕西恒通智能机器有限公司 | Laser 3D printer and laser 3D printing method |
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2017
- 2017-01-18 CN CN201720054655.6U patent/CN206392864U/en not_active Expired - Fee Related
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