CN109940159A - Convection device and convective methods - Google Patents
Convection device and convective methods Download PDFInfo
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- CN109940159A CN109940159A CN201910235660.0A CN201910235660A CN109940159A CN 109940159 A CN109940159 A CN 109940159A CN 201910235660 A CN201910235660 A CN 201910235660A CN 109940159 A CN109940159 A CN 109940159A
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Abstract
The invention belongs to increasing material manufacturing preparation technical field more particularly to a kind of convection devices and convective methods.The convection device, since the other end of the first guide part is formed with the first notch, the other end of second guide part is formed with the second notch, first notch and the second notch are oppositely arranged to form convection channel, and first guide part and the second guide part be both connected on installation base plate, installation base plate is located at the top of print area.In this way, when the printing on print area proceeds to a certain region, it is corresponding with the region printed that actuator drives the first guide part and the second guide part to move to, so that the first notch and the second notch on the first guide part are corresponding with the region printed, in this way, the overlying regions printed always have convection current to blow air over, and so as to take away sputtering and flue dust well, laser are facilitated to focus.In addition, convection channel is always corresponding with the region printed, air quantity requirement is thus substantially reduced, reduces machine cost.
Description
Technical field
The invention belongs to increasing material manufacturing preparation technical field more particularly to a kind of convection devices and convective methods.
Background technique
The construction platform of increasing material manufacturing equipment, the temperature of molding protection room, the oxygen concentration and inert gas flow of protection room
The factors such as the speed through powder surface will affect the formation of technique conversion and part defect.
When printing, laser focuses on metal powder surface and quickly streaks, and molten bath at a certain moment can nearby generate splashing, cigarette
Dirt, this influences subsequent time laser focusing effect, so that the temperature of focus point is widely varied.In addition, sputtered
Grain is splashed to machining area surface and mixes in the powder.The temperature of these particles fuses is higher than unprocessed powder and wetability
Difference, therefore can only be set in part main body, become the fracture origin of part.When part is when bearing external force, splash
Faying face between grain and part main body is firstly broken, so that initial collapse line is formed, under the further effect of external force, this
A little crackles gradually extend, and eventually lead to part breaking failure.To reduce this defect, using inert gas on forming area surface pair
Stream reduces the influence splashed and focused with flue dust to laser, while splashing particle being blown away.
The convection type of print area surface inertness gas is entire print area convection current currently on the market, but substantially
It is big that the printer in face realizes that entire print area convection current requires fan delivery.The high-air-tightness blower cost of Wind Volume is than small wind
Measure much higher, and the power of blower, volume can also greatly increase.
Summary of the invention
The technical problems to be solved by the present invention are: the convection type for existing print area surface inertness gas is
Technological deficiency at high cost caused by whole region convection current provides a kind of convection device and convective methods.
In order to solve the above technical problems, on the one hand the embodiment of the present invention provides a kind of convection device, including installation base plate, the
One guide part, the second guide part and driving mechanism, the installation base plate are located at the top of print area, first guide part and
Second guide part is arranged on the installation base plate；
One end of first guide part is connected to gas source, and the other end of first guide part is formed with the first notch,
One end of second guide part is in communication with the outside, and the other end of second guide part is formed with the second notch, and described first
Notch and second notch are oppositely arranged to form convection channel, and on the extending direction of first straight line, and described first lacks
Mouth and second notch are located at the two sides of the print area；
The driving mechanism is for driving first guide part and second guide part to move, to drive described first
Notch and second notch are moved along second straight line；
The first straight line is mutually perpendicular to the second straight line, the first straight line and the second straight line with it is described
The direction of installation base plate to the print area is vertical.
Optionally, development length of first notch in the second straight line is less than second notch described the
Development length on two straight lines.
Optionally, first guide part includes the first connecting band, and second guide part includes the second connecting band, described
Driving mechanism includes actuator, the first driving wheel, the first idle pulley, the second driving wheel and the second idle pulley；
First connecting band is set on first driving wheel and first idle pulley, the first connecting band bending
So that first connecting band is formed with the first cavity with first notch, first cavity and the gas source connect
It is logical；
Second connecting band is set on second driving wheel and second idle pulley, the second connecting band bend so that
Second connecting band is formed with the second cavity with second notch, and second cavity is in communication with the outside；
The actuator is rotated for first driving wheel and the second driving wheel.
Optionally, it is formed with the air inlet for being connected to the gas source on the installation base plate and what is be in communication with the outside goes out
Air port, the bending place of first connecting band is located in the air inlet so that the air inlet is connected to first cavity,
The bending place of second connecting band is located in the air outlet so that the air outlet is connected to second cavity.
Optionally, the convection device further includes the first guide vane, first guide vane setting the air inlet with
Between first notch, the extending direction and the installation base plate of first guide vane are flat to the direction of the print area
Row.
Optionally, the convection device further includes the second guide vane, and second guide vane is arranged in first notch
Close to the side of second notch and second notch close to the side of first notch, second guide vane prolongs
It is consistent with the extending direction of the first straight line to stretch direction.
Optionally, second guide vane is equipped with multiple, the arragement direction of multiple second guide vanes and the installation
The direction of substrate to the print area is parallel.
Optionally, first guide part includes the first hose, and the import of first hose is connected to the gas source, institute
The outlet for stating the first hose forms first notch, and second guide part includes the second hose, second hose into
Mouth forms second notch, and the outlet of second hose is connect with the external world；
The driving mechanism includes actuator, the first sliding block, the first guide rail, the second sliding block and the second guide rail, and described first
Sliding block is connected to the outlet end of first hose, and first sliding block is slidably connected on first guide rail, and described second
Sliding block is connected to the input end of second hose, and second sliding block is slidably connected on second guide rail；
For driving, first sliding block slides the actuator along first guide rail and second sliding block is described in
The sliding of second guide rail.
Convection device provided in an embodiment of the present invention, since the other end of the first guide part is formed with the first notch, second
The other end of guide part is formed with the second notch, and the first notch and the second notch are oppositely arranged to form convection channel, and first
Guide part and the second guide part are both connected on installation base plate, and installation base plate is located at the top of print area.In this way, working as print zone
When printing on domain proceeds to a certain region, actuator drives the first guide part and the second guide part to move to and printing
Region is corresponding, so that the first notch and the second notch on the first guide part are corresponding with the region printed, this
Sample, the overlying regions printed always have convection current to blow air over, and so as to take away sputtering and flue dust well, facilitate laser poly-
It is burnt.Further, since convection channel is always corresponding with the region printed, the region of completion is not printed or printed
The few convective winds in top, thus substantially reduce air quantity requirement, can select the blower of low air quantity, reduce machine cost, subtract
Few complete machine consumption.
Another embodiment of the present invention also provides a kind of convective methods of convection device based on the above embodiment, including as follows
Step:
Convection device is placed on to the top of print area；
Printer sequentially forms printing content along second straight line；
Driving mechanism drives first guide part and second guide part movement, so that convection channel and the printing
Content is correspondingly arranged.
Optionally, the projection of the print area on the reference plane is located at the motion range of the convection channel described
In drop shadow spread in reference planes；
The reference planes are the plane where the second straight line and third straight line, the extending direction of the third straight line
It is vertical with the direction of the installation base plate to the print area.
Detailed description of the invention
Fig. 1 is the top view of the convection device of first embodiment provided in an embodiment of the present invention；
Fig. 2 is the front view of convection device shown in FIG. 1；
Fig. 3 is the top view of the convection device of second embodiment provided in an embodiment of the present invention.
Appended drawing reference in specification is as follows:
1, installation base plate；11, air inlet；12, air outlet；2, the first guide part；21, the first notch；3, the second guide part；
31, the second notch；41, the first driving wheel；42, the first idle pulley；43, the second driving wheel；44, the second idle pulley；45, the first sliding block；
46, the first guide rail；47, the second sliding block；48, the second guide rail；49, the first belt；410, the second belt；5, the first guide vane；6,
Second guide vane；10, print area；101, content is printed.
Specific embodiment
In order to which the technical problems, technical solutions and beneficial effects solved by the present invention is more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
The embodiment of the present invention provides a kind of convection device, including installation base plate 1, the first guide part 2, the second guide part 3 and
Driving mechanism, installation base plate 1 are located at the top of print area 10, and the first guide part 2 and the second guide part 3 are arranged at installation base
On plate 1, one end of the first guide part 2 is connected to gas source, and the other end of the first guide part 2 is formed with the first notch 21, and second leads
It is in communication with the outside to one end of part 3, the other end of the second guide part 3 is formed with the second notch 31, and the first notch 21 and second lacks
Mouth 31 is oppositely arranged to form convection channel, and on the extending direction of first straight line a, the first notch 21 and the second notch 31
In the two sides of print area 10.
Wherein, driving mechanism for drive the first guide part 2 and the second guide part 3 movement, with drive the first notch 21 and
Second notch 31 is moved along second straight line b, and first straight line a is mutually perpendicular to second straight line b, and first straight line a and second straight line b are equal
It is vertical to the direction of print area 10 with installation base plate 1.
In this way, actuator drives the first guide part 2 and second when the printing on print area 10 proceeds to a certain region
Guide part 3 move to it is corresponding with the region printed so that the first notch 21 and second on the first guide part 2 are led
The second notch 31 on part 3 is corresponding with the region printed, in this way, the overlying regions printed always have convective wind
It blows over, so as to take away sputtering and flue dust well, laser is facilitated to focus.Further, since convection channel always with beating
The region of print is corresponding, does not print or has printed the few convective winds in top in the region of completion, thus substantially reduce
Air quantity requirement, can select the blower of low air quantity, reduce machine cost, reduce complete machine consumption.
As shown in Figure 1 to Figure 3, development length of first notch 21 on second straight line b is greater than the second notch 31 second
Development length on straight line b, the center of the first notch 21 are aligned with the center of the second notch 31, in this way, the first notch 21 and
Convection velocity between two notches 31 is big, and the laminar flow effect of convection current is good, convenient preferably to take away sputtering and flue dust.
As shown in Figures 1 and 2, the convection device that first embodiment of the invention provides, the first guide part 2 include the first connection
Band, the second guide part 3 include the second connecting band, and driving mechanism includes actuator, the first driving wheel 41, the first idle pulley 42, second
Driving wheel 43 and the second idle pulley 44, the first driving wheel 41 are oppositely arranged on the extending direction of second straight line b with the first idle pulley 42,
Second driving wheel 43 is oppositely arranged on the extending direction of second straight line b with the second idle pulley 44.
First connecting band is set on first driving wheel 41 and first idle pulley 42, first connecting band
It bends so that first connecting band is formed with the first cavity with first notch 21, first cavity and the gas
Source connection, second connecting band are set on second driving wheel 43 and second idle pulley 44, the bending of the second connecting band
So that second connecting band is formed with the second cavity with second notch 31, second cavity is in communication with the outside,
Actuator is rotated for the first driving wheel 41 and the second driving wheel 43.
In this way, first connecting band is rotated around the first driving wheel 41 and the first idle pulley 42 when the rotation of the first driving wheel 41, from
And driving the first notch 21 along the movement of second straight line b, the rotation of the second driving wheel 43 drives the second connecting band around the second active
The rotation of wheel 43 and the second idle pulley 44, so that the second notch 31 be driven to move along second straight line b.
As shown in Figure 1, the outlet air for being formed with the air inlet 11 for being connected to gas source on installation base plate 1 and being in communication with the outside
Mouthfuls 12, the bending place of the first connecting band is located at that air inlet 11 is interior so that air inlet 11 is connected to the first cavity, the second connecting band
Bending place is located in air outlet 12 so that the air outlet 12 is connected to second cavity.
In the present embodiment, actuator includes first motor and the second motor, the output shaft of first motor and the first driving wheel
41 connections, the output shaft of the second motor are connect with the second driving wheel 43.
In other embodiments, actuator can be with double acting sub- servo motor etc..
Preferably, convection device further includes the first guide vane 5 and the second guide vane 6, and the first guide vane 5 is arranged in air inlet
11 and first between notch 21, the extending direction of first guide vane 5 and the installation base plate 1 to the print area 10
Direction is parallel.On the extending direction of first straight line a, the second guide vane 6 is arranged in first notch 21 close to described second
The side of notch 31 and second notch 31 are close to the side of first notch 21, the extension side of second guide vane 6
To consistent with the extending direction of the first straight line a.
In the present embodiment, the second guide vane 6 be equipped with it is multiple, arragement direction and the installation base plate 1 of multiple second guide vanes 6 arrive
The direction of print area 10 is parallel.First guide vane 5 also is provided with multiple.The setting of first guide vane 5 and the second guide vane 6 is advantageous
It is distinguished and admirable in making the wind into air inlet 11 form stable unidirectional ply, to realize better convection effects.
In other embodiments, at least one of which of the first guide vane 5 and the second guide vane 6 can also be omitted.
As shown in figure 3, second embodiment of the invention provides another convection device, exist with the difference of first embodiment
In, the first guide part 2 includes the first hose, and the second guide part 3 includes the second hose, and air inlet 11 and air outlet 12 omit, the
The import of one hose is connected to gas source, and the outlet of the first hose forms the first notch 21, and the import of the second hose forms second and lacks
Mouth 31, it includes actuator, the first sliding block 45, the first guide rail 46, second cunning that the outlet of the second hose, which connect driving mechanism with the external world,
Block 47 and the second guide rail 48, the first sliding block 45 are connected to the outlet end of the first hose, and the first sliding block 45 is slidably connected at first and leads
On rail 46, the second sliding block 47 is connected to the input end of the second hose, and the second sliding block 47 is slidably connected on the second guide rail 48, driving
For driving, the first sliding block 45 slides part along the first guide rail 46 and the second sliding block 47 is slided along the second guide rail 48.Wherein, it first leads
The axis of rail 46 is overlapped with second straight line b, and the axis of the second guide rail 48 is overlapped with third straight line c.
Actuator in the present embodiment includes first motor, the first driving wheel 41, the first idle pulley 42, the first belt 49,
Two motors, the second driving wheel 43, the second idle pulley 44 and the second belt 410, the first belt 49 are set in the first driving wheel 41 and
On one idle pulley 42, the first belt 49 is connect with the first sliding block 45, and the output shaft of first motor is connect with the first driving wheel 41, this
Sample, when first motor drives the rotation of the first driving wheel 41, the first belt 49 is around the first driving wheel 41 and turn of the first idle pulley 42
It is dynamic to be able to drive the first sliding block 45 and slided on the first guide rail 46.
Second belt 410 is set on the second driving wheel 43 and the second idle pulley 44, and the second belt 410 and the second sliding block 47 connect
It connects, the output shaft of the second motor is connect with the second driving wheel 43.In this way, when the second motor drives the rotation of the second driving wheel 43,
Second belt 410 is able to drive the second sliding block 47 cunning on the second guide rail 48 around the second driving wheel 43 and the rotation of the second idle pulley 44
It is dynamic.
In other embodiments, actuator can also be the other structures such as linear motor.
Third embodiment of the invention also provides a kind of convective methods of convection device based on the above embodiment, including as follows
Step:
The convection device is placed on to the top of print area 10；
Printer sequentially forms printing content 101 along the second straight line b；
Driving mechanism drive first guide part 2 and second guide part 3 movement so that the convection channel with just
It is correspondingly arranged in the printing content 101 of formation.
Preferably, the projection of print area 10 on the reference plane is located at the motion range of the convection channel in the ginseng
It examines in the drop shadow spread in plane, the reference planes are the plane where the second straight line b and third straight line c, described the
The extending direction of three straight line c is vertical to the direction of the print area 10 with the installation base plate 1.In this way, convection channel can
Print area 10 is covered, to reduce the sputtering in any region and flue dust.
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
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of convection device, which is characterized in that including installation base plate, the first guide part, the second guide part and driving mechanism, institute
The top that installation base plate is located at print area is stated, first guide part and second guide part are arranged at the installation base
On plate；
One end of first guide part is connected to gas source, and the other end of first guide part is formed with the first notch, described
One end of second guide part is in communication with the outside, and the other end of second guide part is formed with the second notch, first notch
Be oppositely arranged with second notch to form convection channel, and on the extending direction of first straight line, first notch and
Second notch is located at the two sides of the print area；
The driving mechanism is for driving first guide part and second guide part to move, to drive first notch
And second notch is moved along second straight line；
The first straight line is mutually perpendicular to the second straight line, the first straight line and the second straight line with the installation
The direction of substrate to the print area is vertical.
2. convection device according to claim 1, which is characterized in that the first notch prolonging in the second straight line
Elongation is less than development length of second notch in the second straight line.
3. convection device according to claim 1, which is characterized in that first guide part includes the first connecting band, institute
Stating the second guide part includes the second connecting band, and the driving mechanism includes actuator, the first driving wheel, the first idle pulley, the second master
Driving wheel and the second idle pulley；
First connecting band is set on first driving wheel and first idle pulley, first connecting band bend so that
First connecting band is formed with the first cavity with first notch, and first cavity is connected to the gas source；
Second connecting band is set on second driving wheel and second idle pulley, and the second connecting band is bent so that described
Second connecting band is formed with the second cavity with second notch, and second cavity is in communication with the outside；
The actuator is rotated for first driving wheel and the second driving wheel.
4. convection device according to claim 3, which is characterized in that be formed on the installation base plate for the gas
The air inlet of source connection and the air outlet that is in communication with the outside, the bending place of first connecting band be located at the air inlet it is interior so that
The air inlet is connected to first cavity, the bending place of second connecting band be located in the air outlet so that it is described go out
Air port is connected to second cavity.
5. convection device according to claim 4, which is characterized in that the convection device further includes the first guide vane, institute
State the first guide vane be arranged between the air inlet and first notch, the extending direction of first guide vane with it is described
The direction of installation base plate to the print area is parallel.
6. convection device according to claim 1, which is characterized in that the convection device further includes the second guide vane, institute
It states the second guide vane and first notch is set close to the side of second notch and second notch close to described
The extending direction of the side of one notch, second guide vane is consistent with the extending direction of the first straight line.
7. convection device according to claim 6, which is characterized in that second guide vane be equipped with it is multiple, it is multiple described
The arragement direction of second guide vane is parallel with the direction of the installation base plate to the print area.
8. convection device according to claim 1, which is characterized in that first guide part includes the first hose, described
The import of first hose is connected to the gas source, and the outlet of first hose forms first notch, second guiding
Part includes the second hose, and the import of second hose forms second notch, and the outlet of second hose and the external world are even
It connects；
The driving mechanism includes actuator, the first sliding block, the first guide rail, the second sliding block and the second guide rail, first sliding block
It is connected to the outlet end of first hose, first sliding block is slidably connected on first guide rail, second sliding block
It is connected to the input end of second hose, second sliding block is slidably connected on second guide rail；
For driving, first sliding block slides the actuator along first guide rail and second sliding block is along described second
Guide rail sliding.
9. a kind of convective methods based on the described in any item convection devices of claim 1-8, which is characterized in that including walking as follows
It is rapid:
Convection device is placed on to the top of print area；
Printer sequentially forms printing content along second straight line；
Driving mechanism drives first guide part and second guide part movement, so that convection channel and the institute formed
Printing content is stated to be correspondingly arranged.
10. convective methods according to claim 9, which is characterized in that the projection of the print area on the reference plane
Motion range positioned at the convection channel is in the drop shadow spread in the reference planes；
The reference planes are the plane where the second straight line and third straight line, the extending direction of the third straight line and institute
The direction for stating installation base plate to the print area is vertical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910235660.0A CN109940159B (en) | 2019-03-27 | 2019-03-27 | Convection device and convection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910235660.0A CN109940159B (en) | 2019-03-27 | 2019-03-27 | Convection device and convection method |
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| CN109940159A true CN109940159A (en) | 2019-06-28 |
| CN109940159B CN109940159B (en) | 2022-01-07 |
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| CN201910235660.0A Active CN109940159B (en) | 2019-03-27 | 2019-03-27 | Convection device and convection method |
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| CN113020628A (en) * | 2021-03-10 | 2021-06-25 | 贵州航天风华精密设备有限公司 | External circulating ventilation structure of magnesium alloy 3D printer and manufacturing method |
| CN114289740A (en) * | 2021-12-31 | 2022-04-08 | 南京中科煜宸激光技术有限公司 | Integrated scraper device suitable for large-breadth forming of selective laser melting and powder-spreading type additive manufacturing method |
| CN115138875A (en) * | 2021-03-30 | 2022-10-04 | 广东汉邦激光科技有限公司 | Metal 3D printing apparatus follows wind field system |
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| Publication number | Publication date |
|---|---|
| CN109940159B (en) | 2022-01-07 |
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