CN204462873U - A kind of electron beam selective melting atmosphere forming apparatus - Google Patents
A kind of electron beam selective melting atmosphere forming apparatus Download PDFInfo
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- CN204462873U CN204462873U CN201520182232.3U CN201520182232U CN204462873U CN 204462873 U CN204462873 U CN 204462873U CN 201520182232 U CN201520182232 U CN 201520182232U CN 204462873 U CN204462873 U CN 204462873U
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Abstract
The utility model discloses a kind of electron beam selective melting atmosphere forming apparatus, the indoor gas being filled with control climate gas of forming cavity comprised to electron beam selective melting former is filled with equipment, the gas pressure intensity detecting unit that the vaccum-pumping equipment vacuumize shaping chamber and carrying out the gas pressure intensity of forming cavity indoor detects in real time, vaccum-pumping equipment is communicated with forming cavity chamber interior by vacuum lead, gas is filled with equipment and comprises gas-holder, gas transmission pipeline and the flowrate control valve be arranged on gas transmission pipeline, flowrate control valve is solenoid valve and it is controlled by controller, gas pressure intensity detecting unit and flowrate control valve are all electrically connected with controller, controller is electrically connected with parameter input unit.The utility model structure is simple, reasonable in design, input cost is lower and installation is laid and it is easy to operate to use, result of use good, can control effectively to the atmosphere of electron beam selective melting forming cavity indoor.
Description
Technical field
The utility model belongs to electron beam selective melting technical field, especially relates to a kind of electron beam selective melting atmosphere forming apparatus.
Background technology
Electron beam selective melting technology (Selective Electron Beam Melting, English abbreviation SEBM) is a kind of quick manufacturing process emerging at present.Electron beam selective melting process is as follows: in the shaping chamber (being specially vacuum chamber) be shaped at electron beam selective melting, first successively to be tiled equably on forming area powder by power spreading device, and control high-power electron beam by computing machine, and according to the cross section parameters melting powder of wanted formation of parts, correspondingly reach the object successively manufactured, and realize the quick manufacture of 3 d part.In traditional electron beam selective melting technology, need forming cavity indoor for vacuum environment, to ensure that electronic beam current normally works.But under vacuum conditions, during due to high-power electron beam bombardment powder surface, powder there will be defeated and dispersed, causes and blows powder, has a strong impact on forming process; Meanwhile, alloy powder is more easily volatilizing in a vacuum by the chemical composition contained by the rear inside of beam bombardment fusing, thus affects the chemical composition of part formed thereby; And under high vacuum environment, almost do not have conductive medium, temperature conduction mainly by radiation, so also can cause the phenomenon of temperature distributing disproportionation, affect greatly part forming.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of electron beam selective melting atmosphere forming apparatus is provided, its structure is simple, reasonable in design, input cost is lower and installation is laid and it is easy to operate to use, result of use good, can control effectively to the atmosphere of electron beam selective melting forming cavity indoor.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of electron beam selective melting atmosphere forming apparatus, it is characterized in that: comprise the gas vaccum-pumping equipment that is filled with equipment and shaping chamber is vacuumized that the forming cavity indoor to electron beam selective melting former are filled with control climate gas, and the gas pressure intensity of forming cavity indoor is carried out to the gas pressure intensity detecting unit of detection in real time, described vaccum-pumping equipment is communicated with forming cavity chamber interior by vacuum lead, and described control climate gas is hydrogen, nitrogen or inert gas; Described gas is filled with equipment and comprises the gas-holder that control climate gas is equipped with in inside and the gas transmission pipeline be connected between gas-holder and shaping chamber, and is arranged on the flowrate control valve on gas transmission pipeline; The lateral wall of described shaping chamber have respectively for the mounting hole that described vacuum lead and gas transmission pipeline are installed; Described flowrate control valve is solenoid valve and it is controlled by controller, and described gas pressure intensity detecting unit and flowrate control valve are all electrically connected with controller, and described controller is electrically connected with parameter input unit.
Above-mentioned a kind of electron beam selective melting atmosphere forming apparatus, is characterized in that: also comprise the display unit described gas pressure intensity detecting unit institute Detection Information being carried out to simultaneous display, described display unit is electrically connected with controller.
Above-mentioned a kind of electron beam selective melting atmosphere forming apparatus, it is characterized in that: described flowrate control valve is electromagnetic proportional valve, described controller is PID controller.
Above-mentioned a kind of electron beam selective melting atmosphere forming apparatus, is characterized in that: also comprise the signal amplification circuit be connected between described PID controller and flowrate control valve.
Above-mentioned a kind of electron beam selective melting atmosphere forming apparatus, is characterized in that: described gas pressure intensity detecting unit is vacuum meter, and described vacuum meter is electrically connected with controller.
Above-mentioned a kind of electron beam selective melting atmosphere forming apparatus, it is characterized in that: described vaccum-pumping equipment comprises mechanical pump and molecular pump, described vacuum lead comprises the first connecting pipe between air intake opening and shaping chamber being connected to mechanical pump and the second connecting pipe be connected between the air intake opening of molecular pump and shaping chamber, and the 3rd connecting pipe be connected between the gas outlet of molecular pump and the air intake opening of mechanical pump, described first connecting pipe and the second connecting pipe are all equipped with pipeline control valve.
Above-mentioned a kind of electron beam selective melting atmosphere forming apparatus, it is characterized in that: also comprise the three-way pipe be arranged on the 3rd connecting pipe, described 3rd connecting pipe is that boundary is divided into the first pipeline section and the second pipeline section with three-way pipe, first connecting interface of described three-way pipe is connected with the gas outlet of molecular pump by described first pipeline section and its second connecting interface is connected with the air intake opening of mechanical pump by described second pipeline section, and the 3rd connecting interface of described three-way pipe is connected with shaping chamber by the second connecting pipe.
Above-mentioned a kind of electron beam selective melting atmosphere forming apparatus, is characterized in that: described first connecting pipe, the second connecting pipe and the 3rd connecting pipe are corrugated tube.
Above-mentioned a kind of electron beam selective melting atmosphere forming apparatus, it is characterized in that: the pipeline control valve that described first connecting pipe and the second connecting pipe fill is solenoid valve and the two controls by controller, and described mechanical pump and molecular pump control by controller.
Above-mentioned a kind of electron beam selective melting atmosphere forming apparatus, is characterized in that: the pipeline control valve that described first connecting pipe fills is for take out valve in advance, and the pipeline control valve that the second connecting pipe fills is high pressure vacuum valve.
The utility model compared with prior art has the following advantages:
1, structure is simple, reasonable in design and input cost is lower, install lay convenient.
2, a closed-loop control system that the gas pressure intensity of forming cavity indoor is regulated and controled is formed by gas pressure intensity detecting unit, controller and flowrate control valve, accurately controlled by the charge of this closed-loop control system to the control climate gas being filled with shaping chamber, and the gas pressure intensity of forming cavity indoor is maintained a gas pressure intensity value P preset
0.
3, flowrate control valve is electromagnetic proportional valve, controller is PID controller, controlled by the aperture of PID controller to electromagnetic proportional valve, realize the online object changing control climate gas flow in real time, accurately to control the charge of control climate gas.
4, use easy and simple to handle, realize convenient and result of use is good, practical value is high, there is the features such as precision is high, reproducible, fast response time, soft start, reliable and stable, gas pressure intensity range of adjustment is wide, can realize the inert atmosphere of electron beam selective melting accurate, efficiently control.The gas pressure intensity of forming cavity indoor is maintained the gas pressure intensity value P preset
0, there is following beneficial effect: the first, contribute to suppressing alloying element volatilization; Correspondingly, when not being filled with control climate gas, easily cause the deviation of forming part chemical composition, part penalty; The second, produce positive ion after nitrogen and ionized inert gas, positive ion can remove the excess electron of powder surface, prevents electron-collection in powder; Correspondingly, when not being filled with control climate gas, because powder surface electron-collection, powder particle repels mutually, and produce during shaping and blow powder, forming process is unstable; Three, the uniform distribution of temperature field of forming cavity indoor is contributed to; Correspondingly, when not being filled with control climate gas, shaping chamber only has heat radiation to conduct heat a kind of form under vacuum, and parts locally can be caused overheated, and be shaped unstable, unrelieved stress is large, and distortion, problems of crack easily appear in part.Thus, the utility model is adopted to be filled with control climate gas in the forming cavity indoor of electron beam selective melting, dividing potential drop is carried out to the vacuum state of shaping chamber, and make point being pressed in forming process of control climate gas keep stable, inert gas can be made to ionize under the effect of electron beam, the positive ion produced is adsorbed on powder, makes the electronics in powder and its neutralization, thus avoids blowing powder phenomenon; Meanwhile, adding of control climate gas, under the prerequisite not affecting powder and formation of parts chemical composition, improve forming cavity indoor gas pressure, effectively can suppress the volatilization of powder material.In addition, be filled with a certain amount of control climate gas, the heat transmission medium of forming cavity indoor can be increased, make shaped region Temperature Distribution more even, under avoiding vacuum environment, the even part forming caused of the temperature distributing disproportionation that difficult heat transfer causes controls the problem of difficulty.
In sum, the utility model structure is simple, reasonable in design, input cost is lower and installation is laid and it is easy to operate to use, result of use good, can control effectively to the atmosphere of electron beam selective melting forming cavity indoor, can realize the inert atmosphere of electron beam selective melting accurate, efficiently control, solve alloying element volatilization in electron beam selective melting forming process, blow the problems such as powder, and the density of the corresponding adjustment temperature conduction medium of energy, improve being uniformly distributed of temperature field, improve forming process controllability and formation of parts quality.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is gas piping connection diagram of the present utility model.
Fig. 2 is schematic block circuit diagram of the present utility model.
Description of reference numerals:
1-shaping chamber; 2-controller; 3-1-mechanical pump;
3-2-molecular pump; 4-1-the first connecting pipe; 4-11-take out valve in advance;
4-2-the second connecting pipe; 4-21-high pressure vacuum valve; 4-3-the 3rd connecting pipe;
5-gas-holder; 6-gas transmission pipeline; 7-flowrate control valve;
8-display unit; 9-parameter input unit; 10-vacuum meter;
11-three-way pipe; 12-signal amplification circuit.
Embodiment
As shown in Figure 1 and Figure 2, the utility model comprises the vaccum-pumping equipment that the gas being filled with control climate gas in the shaping chamber 1 of electron beam selective melting former is filled with equipment and vacuumizes shaping chamber 1, and the gas pressure intensity in shaping chamber 1 is carried out to the gas pressure intensity detecting unit of detection in real time, described vaccum-pumping equipment is communicated with shaping chamber 1 inside by vacuum lead, and described control climate gas is hydrogen, nitrogen or inert gas.Described gas is filled with equipment and comprises the gas-holder 5 that control climate gas is equipped with in inside and the gas transmission pipeline 6 be connected between gas-holder 5 and shaping chamber 1, and is arranged on the flowrate control valve 7 on gas transmission pipeline 6.The lateral wall of described shaping chamber 1 has respectively for the mounting hole that described vacuum lead and gas transmission pipeline 6 are installed.Described flowrate control valve 7 is solenoid valve and it is controlled by controller 2, and described gas pressure intensity detecting unit and flowrate control valve 7 are all electrically connected with controller 2, and described controller 2 is electrically connected with parameter input unit 9.Described gas pressure intensity detecting unit is arranged in shaping chamber 1.
In the present embodiment, described control climate gas is helium.
During actual use, described control climate gas also can be the inert gas of nitrogen or other type.
In the present embodiment, described flowrate control valve 7 is electromagnetic proportional valve.Described controller 2 is PID controller.
Meanwhile, the utility model also comprises the display unit 8 described gas pressure intensity detecting unit institute Detection Information being carried out to simultaneous display, and described display unit 8 is electrically connected with controller 2.
In the present embodiment, described gas pressure intensity detecting unit is vacuum meter 10, and described vacuum meter 10 is electrically connected with controller 2.Further, the lateral wall of described shaping chamber 1 has the jack for vacuum meter 10 plug-in mounting.
During actual use, described gas pressure intensity detecting unit also can adopt the gas pressure intensity checkout equipment of other types.
In the present embodiment, described vaccum-pumping equipment comprises mechanical pump 3-1 and molecular pump 3-2, described vacuum lead comprises the first connecting pipe 4-1 between air intake opening and shaping chamber 1 being connected to mechanical pump 3-1 and the second connecting pipe 4-2 be connected between the air intake opening of molecular pump 3-2 and shaping chamber 1, and the 3rd connecting pipe 4-3 be connected between the gas outlet of molecular pump 3-2 and the air intake opening of mechanical pump 3-1, described first connecting pipe 4-1 and the second connecting pipe 4-2 is all equipped with pipeline control valve.Further, the pipeline control valve that described first connecting pipe 4-1 fills is for take out valve 4-11 in advance, and the pipeline control valve that the second connecting pipe 4-2 fills is high pressure vacuum valve 4-21, and takes out valve 4-11 in advance and high pressure vacuum valve 4-21 is flow control valve.
Simultaneously, the utility model also comprises the three-way pipe 11 be arranged on the 3rd connecting pipe 4-3, described 3rd connecting pipe 4-3 with three-way pipe 11 for boundary is divided into the first pipeline section and the second pipeline section, first connecting interface of described three-way pipe 11 is connected with the gas outlet of molecular pump 3-2 by described first pipeline section and its second connecting interface is connected with the air intake opening of mechanical pump 3-1 by described second pipeline section, and the 3rd connecting interface of described three-way pipe 11 is connected with shaping chamber 1 by the second connecting pipe 4-2.
In the present embodiment, described first connecting pipe 4-1, the second connecting pipe 4-2 and the 3rd connecting pipe 4-3 are corrugated tube.
During actual use, described first connecting pipe 4-1, the second connecting pipe 4-2 and the 3rd connecting pipe 4-3 also can adopt the connecting pipe of other type, as rubber tube.
In the present embodiment, the pipeline control valve that described first connecting pipe 4-1 and the second connecting pipe 4-2 fills is solenoid valve and the two controls by controller 2, and described mechanical pump 3-1 and molecular pump 3-2 controls by controller 2.Thus, actual manipulation is very easy.
In the present embodiment, the utility model also comprises the signal amplification circuit 12 be connected between described PID controller and flowrate control valve 7.
In actual use procedure, first by gas pressure intensity value P that parameter input unit 9 input presets
0, wherein P
0=2.0 × 10
-1pa ~ 6.0 × 10
-1pa.Described gas pressure intensity detecting unit, controller 2 and flowrate control valve 7 form a closed-loop control system regulated and controled the gas pressure intensity in shaping chamber 1, accurately controlled by the charge of this closed-loop control system to the control climate gas being filled with shaping chamber 1, and the gas pressure intensity in shaping chamber 1 is maintained P
0.Before being filled with control climate gas, be first pumped into high vacuum state by described vaccum-pumping equipment by shaping chamber 1, the gas pressure intensity now in shaping chamber 1 drops to 5.0 × 10
-2below Pa.After being filled with control climate gas by described gas transmission pipeline 6, described gas pressure intensity detecting unit detects the gas pressure intensity in shaping chamber 1 and in real time by detected gas pressure intensity value synchronous driving to controller 2, controller 2 according to described gas pressure intensity detecting unit detect and the gas pressure intensity value transmitted gas pressure intensity value P set by combining
0and by the aperture size of control flow check control valve 7, the gas flow of gas transmission pipeline 6 is regulated, thus realizes the accurate control of control climate gas inlet amount, ensure the continuing of gas pressure intensity in shaping chamber 1, stable and accurately control.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solutions of the utility model.
Claims (10)
1. an electron beam selective melting atmosphere forming apparatus, it is characterized in that: comprise the vaccum-pumping equipment that the gas being filled with control climate gas in the shaping chamber (1) of electron beam selective melting former is filled with equipment and vacuumizes shaping chamber (1), and the gas pressure intensity in shaping chamber (1) is carried out to the gas pressure intensity detecting unit of detection in real time, described vaccum-pumping equipment is communicated with shaping chamber (1) inside by vacuum lead, and described control climate gas is hydrogen, nitrogen or inert gas; Described gas is filled with equipment and comprises the gas-holder (5) that control climate gas is equipped with in inside and the gas transmission pipeline (6) be connected between gas-holder (5) and shaping chamber (1), and is arranged on the flowrate control valve (7) on gas transmission pipeline (6); The lateral wall of described shaping chamber (1) has the mounting hole supplying described vacuum lead and gas transmission pipeline (6) to install respectively; Described flowrate control valve (7) for solenoid valve and its controlled by controller (2), described gas pressure intensity detecting unit and flowrate control valve (7) are all electrically connected with controller (2), and described controller (2) is electrically connected with parameter input unit (9).
2. according to a kind of electron beam selective melting atmosphere forming apparatus according to claim 1, it is characterized in that: also comprise the display unit (8) described gas pressure intensity detecting unit institute Detection Information being carried out to simultaneous display, described display unit (8) is electrically connected with controller (2).
3., according to a kind of electron beam selective melting atmosphere forming apparatus described in claim 1 or 2, it is characterized in that: described flowrate control valve (7) is electromagnetic proportional valve, described controller (2) is PID controller.
4. according to a kind of electron beam selective melting atmosphere forming apparatus according to claim 3, it is characterized in that: also comprise the signal amplification circuit (12) be connected between described PID controller and flowrate control valve (7).
5. according to a kind of electron beam selective melting atmosphere forming apparatus described in claim 1 or 2, it is characterized in that: described gas pressure intensity detecting unit is vacuum meter (10), and described vacuum meter (10) is electrically connected with controller (2).
6. according to a kind of electron beam selective melting atmosphere forming apparatus described in claim 1 or 2, it is characterized in that: described vaccum-pumping equipment comprises mechanical pump (3-1) and molecular pump (3-2), described vacuum lead comprises the first connecting pipe (4-1) between air intake opening and shaping chamber (1) being connected to mechanical pump (3-1) and the second connecting pipe (4-2) be connected between the air intake opening of molecular pump (3-2) and shaping chamber (1), and the 3rd connecting pipe (4-3) be connected between the gas outlet of molecular pump (3-2) and the air intake opening of mechanical pump (3-1), described first connecting pipe (4-1) and the second connecting pipe (4-2) are all equipped with pipeline control valve.
7. according to a kind of electron beam selective melting atmosphere forming apparatus according to claim 6, it is characterized in that: also comprise the three-way pipe (11) be arranged on the 3rd connecting pipe (4-3), described 3rd connecting pipe (4-3) with three-way pipe (11) for boundary is divided into the first pipeline section and the second pipeline section, first connecting interface of described three-way pipe (11) is connected with the gas outlet of molecular pump (3-2) by described first pipeline section and its second connecting interface is connected with the air intake opening of mechanical pump (3-1) by described second pipeline section, 3rd connecting interface of described three-way pipe (11) is connected with shaping chamber (1) by the second connecting pipe (4-2).
8. according to a kind of electron beam selective melting atmosphere forming apparatus according to claim 6, it is characterized in that: described first connecting pipe (4-1), the second connecting pipe (4-2) and the 3rd connecting pipe (4-3) are corrugated tube.
9. according to a kind of electron beam selective melting atmosphere forming apparatus according to claim 6, it is characterized in that: the pipeline control valve that described first connecting pipe (4-1) and the second connecting pipe (4-2) fill is solenoid valve and the two controls by controller (2), and described mechanical pump (3-1) and molecular pump (3-2) control by controller (2).
10. according to a kind of electron beam selective melting atmosphere forming apparatus according to claim 6, it is characterized in that: the pipeline control valve that described first connecting pipe (4-1) fills is for take out valve (4-11) in advance, and the pipeline control valve that the second connecting pipe (4-2) fills is high pressure vacuum valve (4-21).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104765385A (en) * | 2015-03-29 | 2015-07-08 | 西安赛隆金属材料有限责任公司 | Electron beam selected area melting atmosphere adjust and control system and method |
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2015
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104765385A (en) * | 2015-03-29 | 2015-07-08 | 西安赛隆金属材料有限责任公司 | Electron beam selected area melting atmosphere adjust and control system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xi'an Sailong Additive Technology Co.,Ltd. Assignor: XI'AN SAILONG METAL MATERIALS Co.,Ltd. Contract record no.: X2022980007870 Denomination of utility model: An electron beam selective melting atmosphere forming device Granted publication date: 20150708 License type: Common License Record date: 20220615 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| CP03 | Change of name, title or address |
Address after: Room 303-46, building a, Kairui, Fengcheng 12th Road, Xi'an Economic and Technological Development Zone, Shaanxi 710018 Patentee after: Xi'an Sailong Additive Technology Co.,Ltd. Address before: 710,200 Middle section of Jinggao West Road, Jingwei New City New Material Industrial Park, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee before: XI'AN SAILONG METAL MATERIALS Co.,Ltd. |
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| CP03 | Change of name, title or address |