CN108723366B - A kind of electron beam fuse transition state keeps system and keeping method - Google Patents
A kind of electron beam fuse transition state keeps system and keeping method Download PDFInfo
- Publication number
- CN108723366B CN108723366B CN201810324124.3A CN201810324124A CN108723366B CN 108723366 B CN108723366 B CN 108723366B CN 201810324124 A CN201810324124 A CN 201810324124A CN 108723366 B CN108723366 B CN 108723366B
- Authority
- CN
- China
- Prior art keywords
- fuse
- electron beam
- transition state
- feed rate
- wire feed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- B22F10/30—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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
-
- 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
- B22F10/80—Data acquisition or data processing
-
- 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
- B22F12/90—Means for process control, e.g. cameras or sensors
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Automation & Control Theory (AREA)
- Analytical Chemistry (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
A kind of electron beam fuse transition state keeps system and keeping method, and the invention belongs to increasing material manufacturing forming process monitoring device and its methods, solve the problems of existing light, sound, thermal signal monitoring method；The electron beam fuse transition state keeps system, including machine vibration monitoring device, range unit, numerical simulation device and DC motor speed regulating device.Keeping method of the invention includes judgment step, simulation steps, set-up procedure.The present invention merges real-time physical monitoring and numerical simulation data, it can be according to droplet transfer state during electron beam fuse increasing material manufacturing, the wire feed rate of increasing material manufacturing equipment is adjusted, to meet during electron beam fuse increasing material manufacturing, real-time monitoring and adjustment are carried out to increasing material manufacturing process, fuse is made to keep good liquid bridge transition state.
Description
Technical field
The invention belongs to increasing material manufacturing forming process monitoring device and its method, in particular to a kind of electron beam fuse transition
State keeps system and keeping method, the monitoring of fusion real-time physical and numerical simulation data, can the increasing of real-time monitoring electron beam fuse
Material manufactures state, is adjusted electron beam fuse increasing material manufacturing equipment to keep good liquid bridge transition state.
Background technique
Electron beam fuse increases material manufacturing technology, which refers to, obtains two-dimensional silhouette information for the threedimensional model layered shaping of part, and
Generate processing route；Again using electron beam as heat source, according to scheduled processing route, welding wire, layer-by-layer heap are melted in vacuum chamber
Product, it is final to obtain 3-dimensional metal part.Electron beam fuse increases material manufacturing technology is pollution-free with vacuum, forming speed is fast, part
The advantages that good combination property, provides processing method simple, quick, without mold for the production of part, metal near net at
It is had broad application prospects in type.
During electron beam fuse increasing material manufacturing, droplet transfer state can generate very big shadow to the quality and size of workpiece
It rings.When fuse transient mode is liquid bridge transition, manufacturing process is relatively stable, and component shaping is good；When for other transient modes,
Manufacturing process is unstable, and component shaping is bad.Since the shaping speed of electron beam fuse increasing material manufacturing is very fast, therefore to increasing material manufacturing
The transition state of fuse is monitored in the process, is adjusted according to monitoring result to electron beam increasing material manufacturing equipment, is very
It is necessary.
Extensive research carried out to the monitoring of increasing material manufacturing forming process both at home and abroad, traditional forming process monitoring include light,
Sound, thermal signal monitoring method；The acquisition of optical signal and transmission vulnerable to interference, extract characteristic signal heavy workload, cause precision it is low,
Real-time is poor；The frequency of acoustical signal acquisition is more and miscellaneous, there is a problem of that treating capacity is big；Thermal signal is interfered vulnerable to plasma, meeting
Cause testing result error larger；And single detection system can only monitor droplet transfer state, cannot carry out to it in time
Effective adjustment.
Summary of the invention
The present invention provides a kind of electron beam fuse transition state and keeps system and keeping method, solves existing light, sound, heat letter
The problems of number monitoring method, the monitoring of fusion real-time physical and numerical simulation data, increase material in electron beam fuse to meet
In manufacturing process, real-time monitoring and adjustment are carried out to increasing material manufacturing process, fuse is made to keep good liquid bridge transition state.
A kind of electron beam fuse transition state provided by the present invention keeps system, including machine vibration monitoring device, survey
Away from device, numerical simulation device and DC motor speed regulating device, it is characterised in that:
The machine vibration monitoring device acquires the vibration signal of the droplet transfer state of fuse, the numerical simulation in real time
Device judges the fuse transition state of electron beam increasing material manufacturing under current state according to the vibration signal；
The range unit measures elevation information, and the numerical simulation device is simulated difference and sent according to the elevation information
Fuse transition state under silk speed is screened out from it corresponding wire feed rate when fuse transition state is liquid bridge transition；It is described
Elevation information is the operating distance of forming face during range unit to electron beam increasing material manufacturing；
According to the corresponding wire feed rate that the numerical simulation device obtains, the DC motor speed regulating device is to wire feed
Speed is adjusted.
The range unit can be infrared distance measuring device, be also possible to laser ranging system, supersonic range finder.
The DC motor speed regulating device includes adjuster, pressure regulator, dc motor, speed measure feedback device, adjuster
Given voltage is compared with the feedback voltage that speed measure feedback device exports, obtains difference voltage, then amplify to it, is amplified
Difference voltage afterwards is adjusted voltage by pressure regulator, directly as the supply voltage of dc motor, so that control is straight
The revolving speed of galvanic electricity motivation, and then the wire feed rate of electron beam fuse increasing material manufacturing process is adjusted in real time, to avoid because
Wire feed rate and current working status mismatch, and lead to cob webbing.
A kind of electron beam fuse transition state keeping method provided by the present invention, including judgment step, simulation steps and
Set-up procedure, it is characterised in that:
Judgment step: during electron beam increasing material manufacturing, the molten of fuse is acquired in real time by machine vibration monitoring device
Drip the vibration signal of transition state；The vibration signal is compared with ambient noise signal again, judge be under current state
The vibration signal of no real-time acquisition fuse is higher than ambient noise 10dB~20dB, is that then fuse transition state is liquid bridge transition, machine
Tool vibration monitoring device continues to be monitored increasing material manufacturing process；Otherwise simulation steps are carried out；
Simulation steps: elevation information is measured by range unit and is simulated under different wires feed rate according to the elevation information
Fuse transition state, be screened out from it corresponding wire feed rate when fuse transition state is liquid bridge transition, be adjusted step；
The elevation information is the operating distance of forming face during range unit to electron beam increasing material manufacturing；
Set-up procedure: according to the corresponding wire feed rate, controlling DC motor speed regulating device, molten to the electron beam
The wire feed rate of silk increasing material manufacturing equipment is adjusted, so that the electron beam fuse increasing material manufacturing fuse be made to keep good liquid
Bridge transition state.
The electron beam fuse transition state keeping method, it is characterised in that:
In the simulation steps, according to the elevation information, the fuse transition state under different wires feed rate is simulated, including
Following sub-steps:
(1) it establishes geometrical model: geometrical model being established using 3 d modeling software, the geometrical model is by substrate and silk material
Composition, substrate is cuboid, long 1mm~500mm, wide 1mm~500mm, high 1mm~200mm；Silk material is cylindrical body, diameter
0.2mm~5mm, high 1mm~500mm, silk material central axes with 0 °~180 ° of substrate X-axis positive direction angle, silk material threshold value base
Vertical height 0.1mm~the 10mm on material surface, horizontal distance 0mm~10mm of silk material threshold value electron beam center；To described
Geometrical model carries out grid dividing using grid dividing software, and the mesh shape is tetrahedron, cuboid or regular hexahedron, institute
The polyhedron side length for stating grid is 10 μm~500 μm；
Following step is carried out for 0.1m/min~15m/min with wire feed rate, wire feed rate step change is 0.01m/min
~5m/min；
(2) silk material and substrate surface arbitrary mess central point are calculated to the absorption energy q (r) of electron beam:
The η of q (r)=3 UaIb/(πR2)exp(-3(r2)/R2)；
Wherein, fuse materials absorption coefficient η, beam voltage Ua, electron beam current Ib, beam spot radius R, silk
The radial distance r of material or substrate surface arbitrary mess central point apart from beam spot center；Appoint herein for silk material or substrate surface
Grid element center point of anticipating absorbs energy, and heat is transmitted to metal inside by metal surface, and the formula of sub-step (3) contains between metal
The transmitting of heat, therefore each grid element center point has absorption energy；
After the energy for absorbing electron beam, softening, fusing, flowing and solidification behavior can be occurred by moving silk material and substrate,
Form accumulation body and molten bath；
(3) speed of each grid element center point is calculatedPressure p, temperature T and each mesh metal volume fraction F, under calculating
State equation group:
Wherein, beam motion speedFuse materials density metal ρ, time t, fuse materials metal hydraulic power are viscous
Spend μ, fuse materials metal thermal diffusion coefficient β, acceleration of gravityEnvironment temperature Tref, fuse materials Thermal Conductivity by Using λ,
Fuse materials metal specific heat holds Cp, darcy friction coefficient K, Hamiltonian operatorI, j, k distinguish
For rectangular coordinate system in space x, y, z axis positive direction unit vector；
0 < F < 1, refers to volume ratio shared by metal in each grid, can characterize silk material, molten bath, drop and liquid bridge etc.
Surface topography；
Temperature, speed formation temperature field and the velocity field of certain moment each grid element center point；
(4) by the speed of above-mentioned each gridPressure p, temperature T and metal volume score F input visualization processing are soft
Part, simulation calculate the surface topography of silk material, molten bath and accumulation body under different wires feed rate, export silk material end and molten bath table
The vertical range in face；When the vertical range is 0, silk material transition state is liquid bridge transition, is screened out from it corresponding wire feed speed
Degree.
The electron beam fuse transition state keeping method, it is characterised in that:
In the sub-step (1), the 3 d modeling software is the AutoCAD of U.S. Autodesk software company, Germany
The UG of the Siemens PLM Software company or Pro/E of U.S. parameters technology company；The grid dividing software is beauty
Altair company, state hypermesh, the Gridgen of Pointwise company, the U.S. or MSC.Software company, the U.S.
Patran；
Calculating for the sub-step (3) can be realized using the program of C language establishment；
In the sub-step (4), the visualization processing software is the Tecplot of U.S. Tecplot company, the U.S.
The Paraview or U.S. Lao Lunsi livermore national laboratory VisIT of Kitware company.
The electron beam fuse transition state keeping method, it is characterised in that:
In the set-up procedure, firstly, calculating corresponding wire-feed motor according to the corresponding wire feed rate that previous step provides
Given voltage, adjuster is compared given voltage with the feedback voltage that speed measure feedback device exports, obtain difference voltage, then
It is amplified, amplified difference voltage is adjusted voltage by pressure regulator, directly as the electricity of dc motor
Source voltage, to control the revolving speed of dc motor；
The revolving speed of speed measure feedback device monitoring dc motor simultaneously obtains feedback voltage, send to adjuster and given voltage and continues
It is compared, repeatedly, so that dc motor be made to be adjusted to given voltage, and then obtains ideal wire feed rate and fuse
Transition state.
Compared with traditional detection system, mechanical oscillation detection by motivate and receive vibration signal, have certain precision,
The advantages that non-contact, suitable for high temperature detection.It can be used for the every field such as thickness measuring, metal defect detection.
Single detection system can only monitor droplet transfer state, cannot timely and effectively be adjusted to it.Compared to
Single monitoring system, present invention introduces numerical simulation device and range units, can be according to electron beam fuse increasing material manufacturing
Droplet transfer state in journey is adjusted increasing material manufacturing equipment, to reach the mistake to electron beam fuse increasing material manufacturing process
Cross state and carry out real-time monitoring and adjustment, to guarantee that fuse keeps good liquid bridge transition state, avoid because wire feed rate with
Working condition mismatches and causes cob webbing, improves the dimensional accuracy and quality of workpiece, improves forming accuracy.
Detailed description of the invention
Fig. 1 is fuse transition state holding meanss schematic diagram；
Fig. 2 is DC motor speed regulating apparatus system composition block diagram；
Fig. 3 is speed-regulating system static structure schematic diagram；
Fig. 4 is fuse transition state keeping method flow diagram
Specific embodiment
Below in conjunction with drawings and examples, the present invention is further described.
As shown in Figure 1, a kind of electron beam fuse transition state provided by the invention keeps system, including mechanical oscillation monitoring
Device, range unit, numerical simulation device and DC motor speed regulating device；
The machine vibration monitoring device acquires the vibration signal of the droplet transfer state of fuse, the numerical simulation in real time
Device judges the fuse transition state of electron beam increasing material manufacturing under current state according to the vibration signal；
The range unit measures elevation information, and the numerical simulation device is simulated difference and sent according to the elevation information
Fuse transition state under silk speed is screened out from it corresponding wire feed rate when fuse transition state is liquid bridge transition；It is described
Elevation information is the operating distance of forming face during range unit to electron beam increasing material manufacturing；
According to the corresponding wire feed rate that the numerical simulation device obtains, the DC motor speed regulating device is to wire feed
Speed is adjusted.
As shown in Fig. 2, the DC motor speed regulating device includes adjuster, pressure regulator, dc motor, speed measure feedback
Device, adjuster are compared given voltage with the feedback voltage that speed measure feedback device exports, and obtain difference voltage, then carry out to it
Amplification, amplified difference voltage are adjusted voltage by pressure regulator, directly as the supply voltage of dc motor, from
And the revolving speed of dc motor is controlled, and then adjusted in real time to the wire feed rate of electron beam fuse increasing material manufacturing process,
It is mismatched to avoid because of wire feed rate and current working status, leads to cob webbing.
As shown in figure 3, the static relation of each component part of DC motor speed regulating device, is shown below:
Given voltage:
Regulator output voltage: Uc=Kp(Un-Un1),
Regulator output voltage: Ud=KsUc,
DC motor rotation speed:
Speed measure feedback voltage: Un1=α n,
In formula: the voltage amplification coefficient K of adjusterp, the voltage amplification coefficient K of pressure regulators, speed feedback factor alpha, unit
V·min/r；The ideal unloaded input voltage U of dc motord, armature supply Id, power coefficient Ce, armatureresistance R,
Magnetic flux Φ, wire feed rate V, wire feed rolls radius r.
The Static Characteristic Equation of entire DC motor speed regulating device are as follows:
In formula, DC motor speed regulating device amplification factor K=KpKsα/Ce。
The wire feed rate V of the increasing material manufacturing equipment wire-feed motor is adjusted by controlling the revolving speed n of dc motor.
Voltage adjustable extent is 0V~50V, and applicable wire feed rate is 0.01m/min~15m/min.
As shown in figure 4, keeping the electron beam fuse transition state of system to keep using the electron beam fuse transition state
Method, including judgment step, simulation steps, set-up procedure, it is characterised in that:
Judgment step: during electron beam increasing material manufacturing, the molten of fuse is acquired in real time by machine vibration monitoring device
Drip the vibration signal (such as vibration signal frequency is 0~500KHz) of transition state；Again by the vibration signal and ambient noise
Signal is compared, and judges that the vibration signal for whether acquiring fuse under current state in real time is higher than ambient noise 10dB~20dB,
It is that then fuse transition state is liquid bridge transition, machine vibration monitoring device continues to be monitored increasing material manufacturing process；Otherwise into
Row simulation steps；
Simulation steps: through range unit (such as ranging range is 0.005~300mm) measurement elevation information, according to described in
Elevation information simulates the fuse transition state under different wires feed rate, be screened out from it fuse transition state be liquid bridge transition when
Corresponding wire feed rate, is adjusted step；The elevation information is forming during range unit to electron beam increasing material manufacturing
The operating distance in face；
Set-up procedure: according to the corresponding wire feed rate, controlling DC motor speed regulating device, molten to the electron beam
The wire feed rate of silk increasing material manufacturing equipment is adjusted, so that the electron beam fuse increasing material manufacturing fuse be made to keep good liquid
Bridge transition state.
In the set-up procedure, firstly, calculating corresponding wire-feed motor according to the corresponding wire feed rate that previous step provides
Given voltage, adjuster is compared given voltage with the feedback voltage that speed measure feedback device exports, obtain difference voltage, then
It is amplified, amplified difference voltage is adjusted voltage by pressure regulator, directly as the electricity of dc motor
Source voltage, to control the revolving speed of dc motor；
The revolving speed of speed measure feedback device monitoring dc motor simultaneously obtains feedback voltage, send to adjuster and given voltage and continues
It is compared, repeatedly, so that dc motor be made to be adjusted to given voltage, and then obtains ideal wire feed rate and fuse
Transition state.
After wire feed rate adjustment, mechanical oscillation monitoring system is monitored the droplet transfer state of fuse, works as machinery
When the vibration signal that vibration monitor system obtains is judged as liquid bridge transition, then no longer adjust, conversely, continue according to above-mentioned steps into
Row adjustment.
Claims (7)
1. a kind of electron beam fuse transition state keeps system, including machine vibration monitoring device, range unit, numerical simulation dress
It sets and DC motor speed regulating device, it is characterised in that:
The machine vibration monitoring device acquires the vibration signal of the droplet transfer state of fuse, the numerical simulation device in real time
The fuse transition state of electron beam increasing material manufacturing under current state is judged according to the vibration signal；
The range unit measures elevation information, and the numerical simulation device simulates different wire feed speed according to the elevation information
Fuse transition state under degree is screened out from it corresponding wire feed rate when fuse transition state is liquid bridge transition；The height
Information is the operating distance of forming face during range unit to electron beam increasing material manufacturing；
According to the corresponding wire feed rate that the numerical simulation device obtains, the DC motor speed regulating device is to wire feed rate
It is adjusted.
2. electron beam fuse transition state as described in claim 1 keeps system, it is characterised in that: the range unit is red
Outer range unit, laser ranging system or supersonic range finder.
3. electron beam fuse transition state as claimed in claim 1 or 2 keeps system, it is characterised in that: the direct current drive
Machine speed regulation device includes adjuster, pressure regulator, dc motor, speed measure feedback device, and adjuster is to given voltage and speed measure feedback
The feedback voltage of device output is compared, and obtains difference voltage, then amplify to it, and amplified difference voltage passes through pressure regulation
Device is adjusted voltage, directly as the supply voltage of dc motor, to control the revolving speed of dc motor, and then right
The wire feed rate of electron beam fuse increasing material manufacturing process is adjusted in real time, to avoid because of wire feed rate and current working status
It mismatches, leads to cob webbing.
4. keeping the electron beam fuse transition state holding side of system using electron beam fuse transition state described in claim 1
Method, including judgment step, simulation steps and set-up procedure, it is characterised in that:
Judgment step: during electron beam increasing material manufacturing, the molten drop mistake of fuse is acquired in real time by machine vibration monitoring device
Cross the vibration signal of state；The vibration signal is compared with ambient noise signal again, is judged whether real under current state
When acquisition fuse vibration signal be higher than ambient noise 10dB~20dB, be then fuse transition state be liquid bridge transition, machinery vibration
Dynamic monitoring device continues to be monitored increasing material manufacturing process；Otherwise simulation steps are carried out；
Simulation steps: measuring elevation information by range unit, according to the elevation information, simulates molten under different wires feed rate
Silk transition state is screened out from it corresponding wire feed rate when fuse transition state is liquid bridge transition, is adjusted step；It is described
Elevation information is the operating distance of forming face during range unit to electron beam increasing material manufacturing；
Set-up procedure: according to the corresponding wire feed rate, DC motor speed regulating device is controlled, the electron beam fuse is increased
The wire feed rate of material manufacturing equipment is adjusted, so that the electron beam fuse increasing material manufacturing fuse be made to keep good liquid bridge mistake
Cross state.
5. electron beam fuse transition state keeping method as claimed in claim 4, it is characterised in that:
In the simulation steps, according to the elevation information, the fuse transition state under different wires feed rate is simulated, including following
Sub-step:
(1) it establishes geometrical model: geometrical model being established using 3 d modeling software, the geometrical model is by substrate and silk material group
At substrate is cuboid, long 1mm~500mm, wide 1mm~500mm, high 1mm~200mm；Silk material is cylindrical body, diameter 0.2mm
~5mm, high 1mm~500mm, silk material central axes with 0 °~180 ° of substrate X-axis positive direction angle, silk material threshold value substrate surface
Vertical height 0.1mm~10mm, horizontal distance 0mm~10mm of silk material threshold value electron beam center；To the geometry mould
Type carries out grid dividing using grid dividing software, and the mesh shape is tetrahedron, cuboid or regular hexahedron, the grid
Polyhedron side length be 10 μm~500 μm；
With wire feed rate be 0.1m/min~15m/min carry out following step, wire feed rate step change be 0.01m/min~
5m/min；
(2) silk material and substrate arbitrary surfaces grid element center point are calculated to the absorption energy q (r) of electron beam:
The η of q (r)=3 UaIb/(πR2)exp(-3(r2)/R2)；
Wherein, fuse materials absorption coefficient η, beam voltage Ua, electron beam current Ib, beam spot radius R, silk material or
Radial distance r of the substrate arbitrary surfaces grid element center point apart from beam spot center；After the energy for absorbing electron beam, silk is moved
Softening, fusing, flowing and solidification behavior can occur for material and substrate, form accumulation body and molten bath；
(3) speed of each grid element center point is calculatedPressure p, temperature T and each mesh metal volume fraction F, calculate following sides
Journey group:
Wherein, beam motion speedFuse materials density metal ρ, time t, fuse materials molten metal dynamic viscosity μ,
Fuse materials metal thermal diffusion coefficient β, acceleration of gravityEnvironment temperature Tref, fuse materials Thermal Conductivity by Using λ, fuse material
Expect that metal specific heat holds Cp, darcy friction coefficient K, Hamiltonian operatorI, j, k are respectively space
Rectangular coordinate system x, y, z axis positive direction unit vector；
0 < F < 1 refers to volume ratio shared by metal in each grid, can characterize the surface of silk material, molten bath, drop and liquid bridge etc.
Pattern；
Temperature, speed formation temperature field and the velocity field of certain moment each grid element center point；
(4) by the speed of above-mentioned each gridPressure p, temperature T and metal volume score F input visualization processing software, simulation
It calculates the surface topography of silk material, molten bath and accumulation body under different wires feed rate, exports hanging down for silk material end and weld pool surface
Straight distance；When the vertical range is 0, silk material transition state is liquid bridge transition, is screened out from it corresponding wire feed rate.
6. electron beam fuse transition state keeping method as claimed in claim 5, it is characterised in that:
In sub-step described in claim 5 (1), the 3 d modeling software be U.S. Autodesk software company AutoCAD,
The UG of the German Siemens PLM Software company or Pro/E of U.S. parameters technology company；The grid dividing software
For Altair company, U.S. hypermesh, the Gridgen of Pointwise company, the U.S. or MSC.Software company, the U.S.
Patran；
In sub-step described in claim 5 (4), the visualization processing software is the Tecplot of U.S. Tecplot company, beauty
The Paraview or U.S. Lao Lunsi livermore national laboratory VisIT of Kitware company, state.
7. electron beam fuse transition state keeping method as claimed in claim 4, it is characterised in that:
In the set-up procedure, firstly, according to the corresponding wire feed rate that previous step provides calculate corresponding wire-feed motor to
Constant voltage, adjuster are compared given voltage with the feedback voltage that speed measure feedback device exports, and obtain difference voltage, then to it
It amplifies, amplified difference voltage is adjusted voltage by pressure regulator, directly as the power supply electricity of dc motor
Pressure, to control the revolving speed of dc motor；
The revolving speed of speed measure feedback device monitoring dc motor simultaneously obtains feedback voltage, send to adjuster and given voltage and continues
Compare, repeatedly, so that dc motor be made to be adjusted to given voltage, and then obtains ideal wire feed rate and fuse transition
State.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810324124.3A CN108723366B (en) | 2018-04-11 | 2018-04-11 | A kind of electron beam fuse transition state keeps system and keeping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810324124.3A CN108723366B (en) | 2018-04-11 | 2018-04-11 | A kind of electron beam fuse transition state keeps system and keeping method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108723366A CN108723366A (en) | 2018-11-02 |
| CN108723366B true CN108723366B (en) | 2019-07-09 |
Family
ID=63940837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810324124.3A Active CN108723366B (en) | 2018-04-11 | 2018-04-11 | A kind of electron beam fuse transition state keeps system and keeping method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108723366B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109530919B (en) * | 2018-12-04 | 2020-11-06 | 华中科技大学 | Ultrasonic-assisted multi-beam laser fuse additive manufacturing equipment and method |
| CN109848409B (en) * | 2019-01-29 | 2021-02-19 | 中国科学院理化技术研究所 | Liquid metal wire for 3D printing and preparation method thereof |
| CN110142493B (en) * | 2019-05-29 | 2021-06-08 | 中国航空制造技术研究院 | Closed-loop control system and method for electron beam fuse deposition forming filament end position |
| CN110625307B (en) * | 2019-09-26 | 2020-08-18 | 华中科技大学 | Method, device and equipment for predicting multilayer multi-channel stacking behavior of fuse additive manufacturing |
| CN114178546B (en) * | 2021-11-25 | 2022-11-01 | 清华大学 | Method and device for monitoring transition state of molten drop deposited by dual-channel electron beam fuse |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7208731A (en) * | 1972-06-26 | 1973-12-28 | Skf Ind Trading & Dev | |
| JPH01247507A (en) * | 1988-03-30 | 1989-10-03 | Nippon Steel Corp | Method for converting molten metal into drops |
| CN103448247B (en) * | 2013-09-13 | 2015-08-26 | 周建 | The control system of the accurate stack colorful three-dimensional three-dimensional printing machine printed can be realized |
| CN104210108B (en) * | 2014-09-15 | 2017-11-28 | 宁波高新区乐轩锐蓝智能科技有限公司 | The print defect of 3D printer makes up method and system |
| CN104669623B (en) * | 2015-02-09 | 2017-01-18 | 浙江大学 | Wire feeding speed control system and method of FDM rapid molding machine |
| CN105128332B (en) * | 2015-09-01 | 2019-04-30 | 芜湖思瑞迪三维科技有限公司 | A kind of intellectual monitoring 3D printing equipment |
| CN205498071U (en) * | 2016-03-08 | 2016-08-24 | 福建省物联网科学研究院 | Multi -functional 3D print system |
-
2018
- 2018-04-11 CN CN201810324124.3A patent/CN108723366B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108723366A (en) | 2018-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108723366B (en) | A kind of electron beam fuse transition state keeps system and keeping method | |
| Ma et al. | Optimization strategies for robotic additive and subtractive manufacturing of large and high thin-walled aluminum structures | |
| Eisenbarth et al. | Spatial powder flow measurement and efficiency prediction for laser direct metal deposition | |
| CN103978307B (en) | A kind of macromolecular material Ultra-Violet Laser 3D Method of printing for accurate temperature controlling and device | |
| CN108098146B (en) | High-precision laser additive forming method for non-flat surface | |
| Zhang et al. | An integrated dual ultrasonic selective powder dispensing platform for three-dimensional printing of multiple material metal/glass objects in selective laser melting | |
| Yang et al. | Tool edge radius effect on cutting temperature in micro-end-milling process | |
| CN104972124B (en) | Real-time monitoring rapid prototyping device and method based on femtosecond laser composite technology | |
| CN102139415B (en) | Vascular stent cutting device and vascular stent cutting method | |
| CN107402044A (en) | A kind of online nondestructive detection system of metal increasing material manufacturing component quality and method | |
| CN107037126A (en) | Acoustic monitoring method for additivity manufacturing process | |
| Moralejo et al. | A feedforward controller for tuning laser cladding melt pool geometry in real time | |
| CN110747459B (en) | Robot-linked double-beam steering control method for laser cladding composite laser forging | |
| CN111283192A (en) | Laser powder bed melting additive manufacturing molten pool monitoring and pore control method | |
| KR101492339B1 (en) | Method for controlling laser cladding and laser cladding system | |
| CN110093601B (en) | Method and device for laser cladding real-time thickness measurement and feedback | |
| CN109420762A (en) | A kind of 3D printing device and method | |
| CN108907191A (en) | 30CrMnSiA metal pattern increasing material manufacturing method suitable for high wind tunnel testing | |
| KR20150044418A (en) | Method for controlling laser cladding and laser cladding system | |
| CN203764976U (en) | Laser forming manufacture integration platform equipment | |
| Zhang et al. | Experimental and numerical investigation on the effect of layer thickness during laser powder-bed fusion of stainless steel 17-4PH | |
| CN206084386U (en) | Increase and decrease material combined machining equipment | |
| Jhabvala et al. | Study of the inter‐particle necks in selective laser sintering | |
| Dunaway et al. | A preliminary experimental study of additive manufacturing energy consumption | |
| Zhao et al. | Theoretical and experimental investigation of the effect of the machining process chain on surface generation in ultra-precision fly cutting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |