CN106623920B - A kind of the compact 3D printer powder supplying mechanism and drive method of precision - Google Patents
A kind of the compact 3D printer powder supplying mechanism and drive method of precision Download PDFInfo
- Publication number
- CN106623920B CN106623920B CN201610944855.9A CN201610944855A CN106623920B CN 106623920 B CN106623920 B CN 106623920B CN 201610944855 A CN201610944855 A CN 201610944855A CN 106623920 B CN106623920 B CN 106623920B
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- screw rod
- splined shaft
- splined
- supplying mechanism
- cylinder body
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Classifications
-
- 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
-
- 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
-
- 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
- B22F10/10—Formation of a green body
-
- 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
-
- 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
- B22F12/222—Driving means for motion along a direction orthogonal to 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
-
- 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
-
- 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
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
-
- 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
- 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
- B22F12/30—Platforms or substrates
-
- 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
Abstract
A kind of the compact 3D printer powder supplying mechanism and drive method of precision, including lower cylinder body, splined member, screw rod and motor, the lower cylinder body top are equipped with supporting element；The splined member includes splined shaft and spline housing, and the spline housing is fixed on the bottom surface of the supporting element, and the lower cylinder body is stretched out in one end of the insertion that the splined shaft the may be axially movable spline housing, the splined shaft；The screw rod includes screw rod and feed screw nut, the feed screw nut is located in the lower cylinder body, and the feed screw nut is fixed on the bottom end of the splined shaft, and the screw rod is threadedly coupled with the feed screw nut, the screw rod protrudes into the splined shaft, and the screw rod is connect with the servo motor.The present invention passes through the connection and transmission between the two of screw rod and splined member.So that powder supplying mechanism has higher precision of rectilinear motion, meet the transmission accuracy demand of 3D printer.In addition, screw rod is protruded into splined member, have the advantages that the arrangement space of drive mechanism is small.
Description
Technical field
The present invention relates to printer powder supplying mechanism technical field more particularly to a kind of compact 3D printer powder supplies of precision
Mechanism and drive method.
Background technique
3D printer is also known as three-dimensional printer, is a kind of cumulative manufacturing technology, i.e. a kind of machine of rapid prototyping technology.It
With adhesive materials such as special wax material, powdery metal or plastics, it is made by printing a layer of adhesive material three-dimensional
Object.3D printer generallys use the kind of drive of screw rod driving cooperation guide rail slide block in print procedure.This class formation needs
A series of guide rail and slide block mechanism are installed, suitable for large-scale equipment, possess enough spaces drive mechanism is arranged.
Therefore, also lead to the drive mechanism that some sizes are small, insufficient space equipment is difficult with screw rod, guide rail.
Chinese Patent Application No. discloses a kind of movement mechanism of 3D printer, including mounting base for 201620147025.9
And X-axis mobile device, Y-axis mobile device, the Z axis mobile device being arranged on.Include fixing seat, screw rod, with it is described
Transmission nut that screw rod matches, with screw rod guiding axis disposed in parallel, linear guide, the cunning matched with linear guide
Block and support frame.It can be seen that although the powder supplying mechanism in this document can ensure the linear motion essence of print head and print platform
Degree, however linear guide is arranged in it, sliding block etc. needs larger space so that application apparatus be subject to many limitations.
Summary of the invention
The purpose of the present invention is to overcome the shortcomings of the existing technology, provides a kind of compact 3D printer powder supply machine of precision
Structure.
The main problem of solution is that existing printer powder supplying mechanism is to guarantee precision of rectilinear motion, leads to powder supplying mechanism
The problem that structure is complicated, bulky.
In order to solve the above technical problems, present invention employs following technical measures:
A kind of compact 3D printer powder supplying mechanism of precision, including lower cylinder body, splined member, screw rod and motor, it is described
Supporting element is equipped with above lower cylinder body, the bottom surface of the supporting element is plane；The splined member includes splined shaft and spline housing, institute
State the bottom surface that spline housing is fixed on the supporting element, the insertion spline housing that the splined shaft may be axially movable, the flower
The lower cylinder body is stretched out in one end of key axis；The screw rod includes screw rod and feed screw nut, and the feed screw nut is located at the lower cylinder
In vivo, the feed screw nut is fixed on the bottom end of the splined shaft, and the screw rod is threadedly coupled with the feed screw nut, the spiral shell
Bar protrudes into the splined shaft, and the screw rod is connect with the motor.
The present invention can also be further perfect by following technical measures:
As a further improvement, the plane perpendicular of the relatively described upper cylinder body of the spline housing is arranged.
As a further improvement, being equipped with through-hole in the splined shaft, the screw rod protruded into the through-hole, the screw rod with
The splined shaft is coaxial.
As a further improvement, the feed screw nut includes fixed part and same axle portion, the fixed part and the splined shaft
It is fixedly connected, the same axle portion protrudes into the through-hole, and the same axle portion is equipped with threaded hole and connect with the screw rod.
As a further improvement, the splined member uses ball spline component, the top of the splined shaft is equipped with work
Platform, the workbench are fixed on the splined shaft by fixing piece, are arranged with y-type seal ring on the fixing piece.
As a further improvement, the spline housing includes interconnecting piece and guide part, the interconnecting piece and the supporting element
Bottom surface is fixedly connected, and the guide part stretches out the lower cylinder body.
As a further improvement, further including shaft coupling, the shaft of the motor is connect by shaft coupling with the screw rod.
As a further improvement, the lower cylinder body bottom offers connecting hole, plane bearing, institute are equipped in the connecting hole
The shaft for stating motor passes through the plane bearing and connect with the shaft coupling.
As a further improvement, further including electromagnetic switch, for controlling the mobile range of the splined shaft, the electromagnetism is opened
Closing includes metalwork and induction pieces, and the bottom surface of the feed screw nut is equipped with metalwork, bottom and top part in the lower cylinder body
It She You not induction pieces.
In addition, additionally provide a kind of drive method, using above-mentioned powder supplying mechanism, including controller, the controller with
Powder supplying mechanism connection, comprising the following steps:
Workbench is fixedly connected by S1 with the top of the splined shaft；
S2, starts motor and controller, and the motor drives the screw rod rotation；
S3, along the axial movement of screw rod, the splined shaft moves the feed screw nut together with feed screw nut；
S4, the workbench move up and down under the drive of the splined shaft along accommodating cavity.
Compared with prior art, the invention has the following advantages that
1, since splined member has the characteristic of high-precision longitudinal axis sliding, while screw rod also has high-precision transmission special
Property.Therefore, pass through the connection and transmission between the two of screw rod and splined member.So that powder supplying mechanism has higher straight line
Kinematic accuracy meets the transmission accuracy demand of 3D printer.In addition, screw rod is protruded into splined member, this connection relationship is big
The arrangement space of drive mechanism is reduced greatly, so that the powder supplying mechanism of screw rod and splined member composition can be applied to some spaces
In equipment small, size is small.
2, the plane perpendicular of the relatively described supporting element of the spline housing is arranged, so that the spline with spline housing coaxial arrangement
Axis, also the plane perpendicular setting of relative support.Thus it is guaranteed that the vertical precision of splined shaft, so that splined shaft is along axial fortune
Dynamic vertical range reaches design requirement.
Detailed description of the invention
Attached drawing 1 is the stereoscopic schematic diagram of accurate compact 3D printer powder supplying mechanism of the invention；
Attached drawing 2 is the main sectional view of compact 3D printer powder supplying mechanism accurate shown in attached drawing 1；
Attached drawing 3 is that the solid of splined member and screw rod is shown in compact 3D printer powder supplying mechanism accurate shown in attached drawing 1
It is intended to；
Attached drawing 4 is the stereoscopic schematic diagram of feed screw nut in compact 3D printer powder supplying mechanism accurate shown in attached drawing 2.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing.
The present invention is main to solve the problems, such as it is the drive mechanism for changing existing screw rod and guide rail cooperation, simplifies transmission
Structure and diminution powder supplying mechanism volume.Certainly on the basis of solving the problems, such as, the precision of rectilinear motion for guaranteeing powder supplying mechanism is also needed,
It can be applied in 3D printer equipment.Wherein, the characteristics of being formed according to metal 3D printer, it is desirable that the distance of each feeding
For 0.02mm, repetitive error is in 0.005mm hereinafter, the driving member therefore connecting with workbench must linear motion with higher
Range accuracy, and have that controllability is high, movement is steady.
Please refer to Fig. 1 and Fig. 2, a kind of compact 3D printer powder supplying mechanism of precision includes lower cylinder body 10, splined member
50 and screw rod 40, accommodating cavity 13 is equipped in the lower cylinder body 10, and the splined member 50 is located at the accommodating cavity 13 with screw rod 40
It is interior.Supporting element 30 is equipped with above the lower cylinder body 10, it is subsequent splined member 50 that the bottom surface 31 of the supporting element, which is plane,
Setting is prepared.Wherein, the supporting element 30 is in hollow housing structure, and the component of equipment is facilitated to be arranged.
Referring to FIG. 2, the splined member 50 includes splined shaft 52 and spline housing 51, the spline housing 51 is fixed on described
The bottom surface 31 of supporting element.The insertion that the splined shaft 52 the may be axially movable spline housing 51, one end of the splined shaft 52
Stretch out the lower cylinder body 10.By cleverly using splined member 50, splined shaft 52 acts on driving member, and matched spline
Set 51 plays guiding role, eliminates the structure of big volume, complicated guide rail, sliding block.
Referring to FIG. 2, the screw rod 40 includes screw rod 42 and feed screw nut 41, the feed screw nut 41 is located at the lower cylinder
In body 10, the feed screw nut 41 is fixed on the bottom end of the splined shaft 52, the screw rod 42 and 41 screw thread of feed screw nut
Connection, the screw rod 42 protrude into the splined shaft 52, and the screw rod 42 is connect with the motor 20.By feed screw nut 41 and flower
Key axis 52 is fixedly connected, and screw rod 40 is enabled to drive the linear motion of splined shaft 52, have linear motion range accuracy height and
The good advantage of transmission stability.
Since splined member 50 has the characteristic of high-precision longitudinal axis sliding, while screw rod 40 also has high-precision transmission
Characteristic.Therefore, pass through the connection and transmission between the two of screw rod 40 and splined member 50.So that powder supplying mechanism have compared with
High precision of rectilinear motion meets the transmission accuracy demand of 3D printer.In addition, screw rod 42 is protruded into splined member 50, it is this
Connection relationship greatly reduces the arrangement space of drive mechanism, the powder supplying mechanism that screw rod 40 and splined member 50 are formed
In the equipment small applied to some spaces, size is small.
Referring to FIG. 2, preferred, the plane perpendicular setting of the relatively described upper cylinder body of spline housing 51.So that and spline
The splined shaft 52 of 51 coaxial arrangement of set, also the bottom surface 31 of relative support is vertically arranged.Thus it is guaranteed that splined shaft 52 is vertical
Precision, so that the vertical range of splined shaft 52 reaches design requirement.
Referring to FIG. 2, being equipped with through-hole 53 in the splined shaft 52, the screw rod 42 is protruded into the through-hole 53, the spiral shell
Bar 42 and the splined shaft 52 are coaxial, so that the transmission of the screw rod 40 will not influence the vertical precision of the splined shaft 52, from
And guarantee the range accuracy that the splined shaft 52 moves along a straight line.
Please refer to Fig. 2 and Fig. 4, the feed screw nut 41 includes fixed part 411 and with axle portion 412, the fixed part 411 with
The splined shaft 52 is fixedly connected, and the same axle portion 412 protrudes into the through-hole 53, and the same axle portion 412 is equipped with threaded hole 413
It is connect with the screw rod 42.The same axle portion 412 is protruded into the through-hole 53, the relatively described flower of the screw rod 42 is effectively avoided
52 deflection of key axis, so that the screw rod 42 is coaxial with the splined shaft 52 under the action of same axle portion 412.
Referring to FIG. 3, the splined member 50 uses ball spline, there is rotary motion to slide with along y direction, energy
It is enough to connect to form powder supplying mechanism with the screw rod 40, have the advantages that structure simplification, stable drive, with high accuracy.The spline housing
51 include interconnecting piece 511 and guide part 512, and the interconnecting piece 511 is fixedly connected with the bottom surface 31 of the supporting element, the guiding
The lower cylinder body 10 is stretched out in portion 512.
Referring to FIG. 3, the top of the splined shaft 52 is equipped with workbench 70, the workbench 70 is fixed by fixing piece 32
On the splined shaft 52.It is arranged with y-type seal ring 33 on the fixing piece 32, prevents metal powder etc. from falling into powder supplying mechanism
It is interior.
Fig. 2 and Fig. 3 are please referred to, further includes shaft coupling 80, the shaft of the motor 20 passes through shaft coupling 80 and the screw rod
42 connections.Enable motor 20 that screw rod 42 is smoothly driven to rotate by shaft coupling 80.10 bottom of lower cylinder body offers
Connecting hole 11, the connecting hole 11 is interior to be equipped with plane bearing 12, and the shaft of the motor 20 passes through the plane bearing 12 and institute
State the connection of shaft coupling 80.The plane bearing 12 is capable of the shaft of motor 20 described in effective protection, and extend motor 20 uses the longevity
Life.
Referring to FIG. 3, further including electromagnetic switch 60, for controlling the mobile range of the splined shaft 52, the electromagnetism is opened
Closing 60 includes metalwork 61 and induction pieces 62, and the bottom surface of the feed screw nut 41 is equipped with metalwork 61, in the lower cylinder body 10
Bottom and top are respectively equipped with induction pieces 62.The upper limit and lower limit has been set separately in the moving process of the splined shaft 52, it is described
Induction pieces 62 are respectively used to control the mobile upper limit of the splined shaft 52 and mobile lower limit.
A kind of drive method is additionally provided, using above-mentioned powder supplying mechanism, including controller, the controller and powder supply machine
Structure connection, comprising the following steps:
Workbench 70 is fixedly connected by S1 with the top of the splined shaft 52；
S2, starts motor 20 and controller, and the motor 20 drives the screw rod 40 to rotate；
S3, along the axial movement of screw rod 40, the splined shaft 52 moves the feed screw nut 41 together with feed screw nut 41；
S4, the workbench 70 move up and down under the drive of the splined shaft 52 along accommodating cavity 13.
Wherein, in step 4, when the splined shaft 52 is moved to the upper limit or lower limit, the electromagnetic switch 60 will work,
After the induction pieces 62 sense metalwork 61, controller is connected, so that controller controls the motor 20 and stops operating.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (8)
1. a kind of compact 3D printer powder supplying mechanism of precision, it is characterised in that: including lower cylinder body, splined member, screw rod and
Motor, the lower cylinder body top are equipped with supporting element, and the bottom surface of the supporting element is plane；The splined member include splined shaft and
Spline housing, the spline housing include interconnecting piece and guide part, and the interconnecting piece is fixedly connected with the bottom surface of the supporting element, described
The plane perpendicular of the relatively described supporting element of guide part is arranged, and the guide part stretches out the lower cylinder body, and the splined shaft can be along axis
To the insertion spline housing of movement, the lower cylinder body is stretched out in one end of the splined shaft；The screw rod includes screw rod and screw rod
Nut, the feed screw nut are located in the lower cylinder body, and the feed screw nut is fixed on the bottom end of the splined shaft, the screw rod
It is threadedly coupled with the feed screw nut, the screw rod protrudes into the splined shaft, and the screw rod is connect with the motor；The flower
The top of key axis is equipped with workbench, and the workbench is for supplying powder.
2. the compact 3D printer powder supplying mechanism of precision according to claim 1, which is characterized in that in the splined shaft
Equipped with through-hole, the screw rod is protruded into the through-hole, and the screw rod and the splined shaft are coaxial.
3. the compact 3D printer powder supplying mechanism of precision according to claim 2, which is characterized in that the feed screw nut
Including fixed part and same axle portion, the fixed part is fixedly connected with the splined shaft, and the same axle portion protrudes into the through-hole, institute
Same axle portion is stated to connect equipped with threaded hole with the screw rod.
4. the compact 3D printer powder supplying mechanism of precision according to claim 1, which is characterized in that the splined member
Using ball spline component, the workbench is fixed on the splined shaft by fixing piece, and Y type is arranged on the fixing piece
Sealing ring.
5. the compact 3D printer powder supplying mechanism of precision according to claim 1, which is characterized in that further include shaft coupling
The shaft of device, the motor is connect by shaft coupling with the screw rod.
6. the compact 3D printer powder supplying mechanism of precision according to claim 5, which is characterized in that the lower cylinder body bottom
Portion offers connecting hole, is equipped with plane bearing in the connecting hole, the shaft of the motor pass through the plane bearing with it is described
Shaft coupling connection.
7. the compact 3D printer powder supplying mechanism of precision according to claim 1, which is characterized in that further include that electromagnetism is opened
It closes, for controlling the mobile range of the splined shaft, the electromagnetic switch includes metalwork and induction pieces, the feed screw nut's
Bottom surface is equipped with metalwork, and the bottom and top in the lower cylinder body are respectively equipped with induction pieces.
8. a kind of drive method, which is characterized in that use the powder supplying mechanism in claim 1 to 7 any one, including control
Device, the controller are connect with powder supplying mechanism, comprising the following steps:
Workbench is fixedly connected by S1 with the top of the splined shaft；
S2, starts motor and controller, and the motor drives the screw rod rotation；
S3, along the axial movement of screw rod, the splined shaft moves the feed screw nut together with feed screw nut；
S4, the workbench move up and down under the drive of the splined shaft along accommodating cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610944855.9A CN106623920B (en) | 2016-10-26 | 2016-10-26 | A kind of the compact 3D printer powder supplying mechanism and drive method of precision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610944855.9A CN106623920B (en) | 2016-10-26 | 2016-10-26 | A kind of the compact 3D printer powder supplying mechanism and drive method of precision |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106623920A CN106623920A (en) | 2017-05-10 |
| CN106623920B true CN106623920B (en) | 2019-08-13 |
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| CN201610944855.9A Active CN106623920B (en) | 2016-10-26 | 2016-10-26 | A kind of the compact 3D printer powder supplying mechanism and drive method of precision |
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| CN103192081A (en) * | 2013-04-27 | 2013-07-10 | 余振新 | Longitudinal movement device of selective laser sintering molding platform |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106623920A (en) | 2017-05-10 |
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