CN207756918U - A kind of selective laser fusing hypoxic atmosphere circulating purification system - Google Patents
A kind of selective laser fusing hypoxic atmosphere circulating purification system Download PDFInfo
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- CN207756918U CN207756918U CN201820155394.1U CN201820155394U CN207756918U CN 207756918 U CN207756918 U CN 207756918U CN 201820155394 U CN201820155394 U CN 201820155394U CN 207756918 U CN207756918 U CN 207756918U
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- valve
- purification system
- selective laser
- circulating purification
- hypoxic atmosphere
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Abstract
The utility model discloses a kind of selective lasers to melt hypoxic atmosphere circulating purification system,Closed forming cavity including being internally provided with scraper,Laser window piece protection location is provided in the cavity wall of closed forming cavity side,Circularly purifying unit and monitoring unit are connected to by connection structure with closed forming cavity,The system can quickly deoxygenation and can according to actual demand be arranged closed chamber in oxygen content concentration and pressure range,Monitor the oxygen content and pressure in airtight cavity in real time,Ensure the state that hypoxemia constant pressure is in closed chamber,And by the smog generated in print procedure and contaminant filter,The gas of purification is for recycling,Ensure that metal powder is not contaminated,Improve forming parts quality,The utility model can directly utilize recyclegas,Out-source gas is not needed,Protect laser window piece not contaminated,Extend service life,And it is of low cost.
Description
Technical field
The present invention relates to increasing material manufacturing research fields, melt hypoxic atmosphere circularly purifying more particularly to a kind of selective laser
System.
Background technology
Selective laser smelting technology (Selective Laser Melting, SLM) is a kind of to utilize high power density
Laser beam melts the new pattern laser rapid prototyping technology of metal powder straight forming, which can directly manufacture dense structure, machine
Tool is functional, high-precision metal parts, is one of latest development form of RP technique.
In the melt-processed forming process in selective laser, if containing hyperoxia in environment, metal powder is molten in laser emission
It can contact and aoxidize with oxygen after change, or even burning.When containing the elements such as C, Si, Mn, Ti and Ca in metal powder, they
It can be easier to be combined row at stable impurity phase with oxygen, seriously affect the quality of metal forming part.Therefore, selective laser is being carried out
When melt-processed molding, needs to be passed through the inert gases such as nitrogen or argon gas to processing environment and be protected, prevent high-temperature oxydation.
Meanwhile even if being found under environmental protection in process engineering, laser and the moment of metal powder effect will produce splatter
And smog, when the metal oxide of splashing and it is full of smoke to entire molding room when, not only can to metal powder generate pollution, directly
Connecing influences forming parts quality, can also pollute laser window piece.After laser window piece pollutes, diaphragm perspective rate can reduce,
Directly result in laser irradiation to metal powder surface underpower, fusion of metal powder is insufficient, influence metal parts at
Type quality and shaping efficiency, being resulted even in when serious can not be molded.Simultaneously as flue dust is attached on diaphragm, diaphragm
A large amount of laser energy can be absorbed, causes diaphragm fever even to crack, seriously affects the service life of laser window piece.
Therefore, in the melt-processed forming process in selective laser, a hypoxemia and the molding environment of non smoke are provided for it
It is very necessary.Currently, what selective laser melting unit substantially used is all directly to be passed through high-purity into molding room always
Inert gas makes the oxygen content inside molding room reduce until oxygen content reaches the mode of forming requirements, but this mode deoxygenation
Efficiency is low, and inert gas waste is serious, increases production cost.Meanwhile using cheap scheme specifically for laser window
Piece is protected, and is extended its service life and is also had a very important significance.
Utility model content
In view of the deficiencies of the prior art, molding room can be carried out quick deoxygenation and keep low the utility model by providing one kind
The environment of oxygen, and purification is filtered to recyclegas, while laser window piece can be protected from the pollution of flue dust, extend laser
Melt hypoxic atmosphere circulating purification system in the selective laser of the service life of diaphragm.
In order to solve the above technical problems, the utility model is addressed by the following technical programs：A kind of selective laser is molten
Change hypoxic atmosphere circulating purification system, including is internally provided with the closed forming cavity of scraper, the closed forming cavity side cavity wall
On be provided with laser window piece protection location, circularly purifying unit and monitoring unit pass through connection structure and closed forming cavity
Connection, the laser window piece protection location include be arranged reeded diaphragm mounting plate, mounting plate lower cover, quick plug with
And ratio adjusting valve, laser window piece, sealing ring and mounting plate upper cover are sequentially arranged in the groove of the diaphragm mounting plate.
In said program, it is preferred that the circularly purifying unit include industrial control unit (ICU), inert gas source, gas circulator,
Filter and with control and unicom effect valve body.
In said program, it is preferred that the circularly purifying unit further includes silencer, and the silencer is mounted on three and is powered
On No. 1 port of magnet valve B, it to be used for noise abatement.
In said program, it is preferred that the valve body includes pressure reducing valve, triple valve, three-way magnetic valve A and three-way magnetic valve
B, pressure reducing valve are mounted on inert gas source, the inert gas pressure for controlling inert gas source output, triple valve, threeway electromagnetism
Valve A and three-way magnetic valve B is used to control the break-make of gas, realizes the cycle of gas.
In said program, it is preferred that the monitoring unit include small air pump, oxygen level sensor, pressure sensor with
And two three-way electromagnetic valve A and two three-way electromagnetic valve B, oxygen level sensor are used to monitor the oxygen content in closed forming cavity, pressure sensing
Device is used to monitor the pressure in airtight cavity.
In said program, it is preferred that the connection structure includes connecting line and connecting tube.
In said program, it is preferred that the connecting tube is that PU is managed or stainless steel tube can using the connecting tube of the material
Ensure the reliability of connection and longer service life.
Compared with prior art, the utility model has the advantages that：A kind of selective laser provided by the present application is molten
Changing hypoxic atmosphere circulating purification system can quick deoxygenation and can be dense according to oxygen content in the setting closed chamber of actual demand human nature
Degree and pressure range, oxygen content and pressure that can be in whole real time monitoring airtight cavity, ensure to be in hypoxemia constant pressure in closed chamber
State.The present invention can fall the smog generated in print procedure and contaminant filter, and the gas of purification is ensured for recycling
Metal powder improves forming parts quality not by smog pollution.The diaphragm protection location that the present invention designs directly utilizes
Recyclegas, does not need out-source gas, not only protects laser window piece not contaminated, extends service life, and cost
It is cheap.
Description of the drawings
Fig. 1 is that hypoxic atmosphere circulatory system schematic diagram is melted in selective laser.
Fig. 2 is that laser window piece of the present invention protects unit overall structure diagram.
Fig. 3 is positive three shaft side figure of diaphragm mounting plate of the present invention.
Fig. 4 is diaphragm mounting plate vertical view of the present invention.
Fig. 5 is diaphragm mounting plate upward view of the present invention.
Fig. 6 is positive three shaft side figure of diaphragm mounting plate upper cover of the present invention.
Fig. 7 is positive three shaft side figure of diaphragm mounting plate lower cover of the present invention.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be described in further detail.
Referring to Fig. 1, a kind of selective laser fusing hypoxic atmosphere circulating purification system, including it is internally provided with the close of scraper 15
Close forming cavity 7, be provided with laser window piece protection location 14 in 7 side cavity wall of the closed forming cavity, circularly purifying unit with
And monitoring unit is connected to by connection structure with closed forming cavity, the laser window piece protection location 14 is recessed including being provided with
Diaphragm mounting plate 21, mounting plate lower cover 27, quick plug 22 and the ratio adjusting valve 17 of slot, the diaphragm mounting plate 21
Groove in be sequentially arranged with laser window piece 25, sealing ring 24 and mounting plate upper cover 26.
Referring to Fig. 2 to Fig. 7, mounting plate upper cover 26 is fixed on by hexagon socket head cap screw 23 on diaphragm mounting plate 21, ratio
Regulating valve 17 is connected by 9 one end of connecting tube with quick plug, and one end is connected with triple valve.Ratio adjusting valve 17 is defeated for adjusting
Enter to the gas pressure inside diaphragm mounting plate 21,21 top of diaphragm mounting plate has 360 there are three step on level-one step
6 uniformly distributed counter sinks are spent, and have the threaded hole of a diameter of 10 ~ 15mm on the left of step, there are 360 degree uniformly distributed 6 in two stage steps
A counter sink, 21 lower left side of diaphragm mounting plate have seven diameters identical and the hole of centerline parallel, bore dia 3
~ 8mm, quick plug 22 are threadedly attached on 21 level-one step of diaphragm mounting plate.21 bottom of diaphragm mounting plate is whole
There are one arc groove, grooves to be penetrated through with threaded hole for leftward position, and recess width is more than the screw thread bore dia on level-one step,
Arc groove both ends are semicircle.There are four threaded hole, diaphragm installations in the 21 bottom centre position of diaphragm mounting plate
21 lower cover of plate is " U "-shaped, and there are four counter sink, hexagon socket head cap screws 23, and diaphragm installation lower cover is fixed on diaphragm for bottom,
Diaphragm mounting plate 21 is mounted on closed molding top, has sealing ring between diaphragm mounting plate 21 and closed forming cavity, it is ensured that
The leakproofness of closed forming cavity 7, output pressure value can be arranged in industrial control unit (ICU) in ratio adjusting valve 17, and then controls and enter window
Pressure in mouth piece mounting plate 21, uniform air-flow stable in order to generate.
Referring to Fig. 1, the circularly purifying unit includes industrial control unit (ICU) 4, inert gas source 2, gas circulator 19, filter
18 and the valve body with control and unicom effect, the circularly purifying unit further includes silencer 1, and the valve body includes depressurizing
Valve 3, triple valve 20, three-way magnetic valve A5 and three-way magnetic valve B6, pressure reducing valve is mounted in inert gas source 19, lazy for controlling
Property air source output inert gas pressure, pressure reducing valve 3 is connected with the port 1 of three-way magnetic valve A, the port 2 of three-way magnetic valve A and
7 left side of closed forming cavity is connected, and 18 air inlet of filter is connected with 7 the right of closed forming cavity, 18 gas outlet of filter and gas
Circulating pump is connected to, and 20 a port of triple valve is connect with gas circulator 19, the port 2 of another port and three-way magnetic valve B
It is connected.The port 3 of three-way magnetic valve B is connected with the port 3 of three-way magnetic valve A, and inert gas source is including but not limited to High Purity Nitrogen
Gas and high-purity argon gas, three-way magnetic valve A, gas circulator, three-way magnetic valve B are connected by connecting line with industrial control unit (ICU),
Gas circulation revolution speed is adjustable by industrial control unit (ICU), and silencer is used for noise abatement on the port 1 of three-way magnetic valve B.
Referring to Fig. 1, the monitoring unit includes small air pump 12, oxygen level sensor 11, pressure sensor 16 and two
Three-way electromagnetic valve A10 and two three-way electromagnetic valve B13, the connection structure include connecting line 8 and connecting tube 9, and the connecting tube 9 is managed for PU
Or stainless steel tube, monitoring unit include that two three-way electromagnetic valve A, small air pump, oxygen level sensor, two three-way electromagnetic valve B and pressure pass
Sensor, two three-way electromagnetic valve one end are connected with closed forming cavity top, and the other end is powered with oxygen level sensor, small air pump, two
Magnet valve and closed forming cavity top are sequentially connected in order, and pressure sensor is mounted on closed forming cavity top, two three-way electromagnetic valves
A, oxygen level sensor, small air pump, two three-way electromagnetic valve B, pressure sensor are connected with industrial control unit (ICU), oxygen level sensor
For monitoring the oxygen content in closed forming cavity, pressure sensor is used to monitor the pressure in airtight cavity.
The operation principle of the utility model is：It is first set on industrial control unit (ICU) 4 in the oxygen content in closed forming cavity 7
Limit and lower limit, upper pressure limit and lower limit, 19 rotating speed of pumpdown time and gas circulator in closed forming cavity 7 wait for items
The good latter key startup program of parameter setting, industrial control unit (ICU) 4, which controls three-way magnetic valve A5, at this time makes its port 2 and port 3 be in
Connected state, industrial control unit (ICU) 4 control three-way magnetic valve B6 and open, its port 1 and port 2 is made to be in connected state, while gas
19 operating of body circulation pump, the air in the sealed environment being entirely connected to is discharged from silencer 1, at this time place in closed forming cavity 7
In vacuum state, pressure is measured by pressure sensor 16 and is shown on industrial control unit (ICU) 4, when evacuated between arrive after,
Industrial control unit (ICU) 4 controls three-way magnetic valve A5 and opens, and so that its port 1 and port 2 is in connected state, at this time from inert gas source
2 output inert gases after pressure reducing valve 3 enter is confined in cavity 7, while industrial control unit (ICU) 4 make two three-way electromagnetic valve A10,
Oxygen level sensor 11, small air pump 12 and two three-way electromagnetic valve B13 are all in working condition, the oxygen content in closed forming cavity 7
It is shown on industrial control unit (ICU) 4 in real time.Inert gas constantly enters closed forming cavity from the ports three-way magnetic valve A5 2 at this time
7, mixed gas is constantly ejected from silencer 1, and the inert gas being filled with so quickly reduces in closed molding cavity 7
Oxygen content, after the oxygen content in closed molding cavity 7 reaches set interval, three-way magnetic valve A5 is closed, and makes its 2 He of port
Port 3 is in connected state, and three-way magnetic valve B6 is closed, and so that its port 2 and port 3 is in connected state, at this time whole system
It is in interior recurrent state under the operating of gas circulator 19, pressure constant state is in closed forming cavity 7.Then it is controlled again in industry
The output pressure of setting ratio regulating valve 17 on device 4 processed, the gas for making it into diaphragm mounting plate 21 are flat by internal seven
The air-flow stablized at the uniform velocity is generated behind row hole.If after recycling a period of time, oxygen content or pressure in 7 body of closed forming cavity exceed
The range of set definite value, oxygen level sensor 11 and pressure sensor 16 can feed back to industrial control unit (ICU) 4, it is made to coordinate control three
The switch of three-way electromagnetic valve A5 and three-way magnetic valve B6 ensures that oxygen content in 7 body of closed forming cavity and pressure are in setting value area
In.When oxygen level sensor 11 detects the oxygen content in 7 body of closed forming cavity higher than the setting upper limit, three-way magnetic valve B6
It opens, port 1 is deflated, and three-way magnetic valve A5 is opened, and port 1 is connected to port 2, and inert gas enters closed molding from pressure reducing valve 3
In 7 body of chamber, after oxygen content reaches set interval requirement, three-way magnetic valve B6 and three-way magnetic valve A5 are closed for this action,
System is in interior recurrent state at this time.When pressure sensor 16 detects the pressure in 7 body of closed forming cavity higher than the setting upper limit
When, three-way magnetic valve B6 is opened, and port 1 is deflated until pressure returns to after being arranged in section, and three-way magnetic valve B6 is closed, then at system
In interior recurrent state.When pressure sensor 16 detects the pressure in closed molding cavity 7 less than setting lower limit, threeway electromagnetism
Valve A5 is opened, and port 1 and port 2 are logical at this time, and inert gas enters from pressure reducing valve 3 in closed 7 body of forming cavity to be set up to pressure reaches
After setting in section, three-way magnetic valve A5 is closed, and port 2 is connected to port 3 at this time, and then system is in interior recurrent state.
When printing completion, industrial control unit (ICU) 4 can be first shut off two three-way electromagnetic valve A11 and two three-way electromagnetic valve B13, mesh
Be to preserve a certain amount of low-oxygen gas in oxygen level sensor 11, be at low-oxygen environment, extend its service life.
Then the other parts of system are turned off.
The technical solution of the utility model is described in detail in embodiment described above, it should be understood that the above institute
Only specific embodiment of the utility model is stated, is not intended to limit the utility model, all spirits in the utility model
Interior done any modification, supplement or similar fashion replacement etc., should be included within the scope of protection of this utility model.
Claims (7)
1. hypoxic atmosphere circulating purification system is melted in a kind of selective laser, including is internally provided with scraper（15）Closed forming cavity
（7）, which is characterized in that the closed forming cavity（7）Laser window piece protection location is provided in the cavity wall of side（14）, cycle is only
Change unit and monitoring unit is connected to by connection structure with closed forming cavity, the laser window piece protection location（14）Packet
Include the reeded diaphragm mounting plate of setting（21）, mounting plate lower cover（27）, quick plug（22）And ratio adjusting valve（17）,
The diaphragm mounting plate（21）Groove in be sequentially arranged with laser window piece（25）, sealing ring（24）With mounting plate upper cover
（26）.
2. hypoxic atmosphere circulating purification system is melted in a kind of selective laser according to claim 1, which is characterized in that described
Circularly purifying unit includes industrial control unit (ICU)（4）, inert gas source（2）, gas circulator（19）, filter（18）And with control
The valve body of system and unicom effect.
3. hypoxic atmosphere circulating purification system is melted in a kind of selective laser according to claim 1, which is characterized in that described
Circularly purifying unit further includes silencer（1）.
4. hypoxic atmosphere circulating purification system is melted in a kind of selective laser according to claim 2, which is characterized in that described
Valve body includes pressure reducing valve（3）, triple valve（20）, three-way magnetic valve A（5）And three-way magnetic valve B（6）.
5. hypoxic atmosphere circulating purification system is melted in a kind of selective laser according to claim 2, which is characterized in that described
Monitoring unit includes small air pump（12）, oxygen level sensor（11）, pressure sensor（16）And two three-way electromagnetic valve A（10）With
Two three-way electromagnetic valve B（13）.
6. hypoxic atmosphere circulating purification system is melted in a kind of selective laser according to claim 2, which is characterized in that described
Connection structure includes connecting line（8）And connecting tube（9）.
7. hypoxic atmosphere circulating purification system is melted in a kind of selective laser according to claim 6, which is characterized in that described
Connecting tube（9）For PU pipes or stainless steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820155394.1U CN207756918U (en) | 2018-01-30 | 2018-01-30 | A kind of selective laser fusing hypoxic atmosphere circulating purification system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820155394.1U CN207756918U (en) | 2018-01-30 | 2018-01-30 | A kind of selective laser fusing hypoxic atmosphere circulating purification system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110227820A (en) * | 2019-07-01 | 2019-09-13 | 广州大学 | A kind of printing equipment of SLM type metal 3D printer |
| CN110238398A (en) * | 2019-07-01 | 2019-09-17 | 广州大学 | A kind of lens protection device of SLM type metal 3D printer |
| CN111097910A (en) * | 2020-02-06 | 2020-05-05 | 高尚孜 | AI-based environment control system and control method |
| CN111687549A (en) * | 2020-06-04 | 2020-09-22 | 西安交通大学 | Atmosphere monitoring system and monitoring method for laser/electric arc material increase and decrease manufacturing equipment |
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2018
- 2018-01-30 CN CN201820155394.1U patent/CN207756918U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110227820A (en) * | 2019-07-01 | 2019-09-13 | 广州大学 | A kind of printing equipment of SLM type metal 3D printer |
| CN110238398A (en) * | 2019-07-01 | 2019-09-17 | 广州大学 | A kind of lens protection device of SLM type metal 3D printer |
| CN110238398B (en) * | 2019-07-01 | 2022-01-04 | 广州大学 | Lens protection device of SLM type metal 3D printer |
| CN111097910A (en) * | 2020-02-06 | 2020-05-05 | 高尚孜 | AI-based environment control system and control method |
| CN111097910B (en) * | 2020-02-06 | 2021-11-30 | 高尚孜 | AI-based environment control system and control method |
| CN111687549A (en) * | 2020-06-04 | 2020-09-22 | 西安交通大学 | Atmosphere monitoring system and monitoring method for laser/electric arc material increase and decrease manufacturing equipment |
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