CN105904078A - Zoom welding method and system of electron beam - Google Patents
Zoom welding method and system of electron beam Download PDFInfo
- Publication number
- CN105904078A CN105904078A CN201610481336.3A CN201610481336A CN105904078A CN 105904078 A CN105904078 A CN 105904078A CN 201610481336 A CN201610481336 A CN 201610481336A CN 105904078 A CN105904078 A CN 105904078A
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- China
- Prior art keywords
- electron beam
- focusing
- exciting current
- weld seam
- welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
- B23K15/0046—Welding
- B23K15/0053—Seam welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
The invention discloses a zoom welding method and system of an electron beam. According to the welding velocity v of the electron beam, a change frequency of a focused exciting current I and a change waveform of the focused exciting current I are selected, so that the velocity of a keyhole developing along a welding direction and the change frequency of the focused exciting current I tend to synchronization, that is, the focus point of the electron beam is positioned in the bottom of the keyhole or is close to the bottom of the keyhole all the way. By adopting zoom welding, development of a keyhole effect to the longitudinal direction is facilitated. For same electron beam parameters, a deeper weld joint and a greater depth-to-width ratio of the weld joint can be obtained by adopting zoom welding, so that the welding property of an electron beam welding machine is favorably improved.
Description
Technical field
The present invention relates to electron Beam Machining field, be specifically related to a kind of electron beam zoom soldering method and be
System.
Background technology
The electron beam of high-energy-density is owing to beam spot diameter, is little, heating region is concentrated, thus firing rate pole
Hurry up, the peak temperature obtained is high, can be rapidly reached the boiling point of metal.When the electron beam of big thick member welds
The power density needed has been above the critical pow er density 10 of conduction weldering5W/cm2Time, this electron beam is deep
The feature of melting welding occurs in that keyhole exactly.Explain that at present keyhole formation mechenism has two kinds of viewpoints:
1. evaporation penetrates mechanism and thinks that the evaporation of metal plays decision for deep penetration welding at line shock point
Effect, fusing metal is vaporization counteracting force to the main drive that molten bath tailing edge moves, so that having
The metal or alloy of higher vapor pressure has and deeper penetrates.2. fusing penetrates mechanism and thinks that keyhole is vapour pressure
Common results with the melt flows upward and outward that surface tension gradient causes.Explain in any case,
The formation of keyhole, maintain with stable, and the size of keyhole, size, form and with electron beam and weldering
The dependency connecing material determines the characteristic of keyhole, and its quasistatic behavior in welding process and dynamically
Behavioral trait determines again the quality that electron beam deep penetration welding connects.
Due to electron beam envelope line axially with focus for the tapered divergent shape in two ends, boundary, and the biggest thick member
Electron beam weldering all be use focus weldering, when only electron beam spot acts on metal, maximum could be obtained
Vapour pressure.Therefore no matter electron beam spot is positioned at weld seam longitudinally any fixed position, and keyhole is from top to bottom
Generation during, the electron beam spot overwhelming majority time is not located at the bottom of keyhole, thus reduces
Keyhole develops in depth.
Summary of the invention
The technical problem to be solved is that existing deep penetration welding process uses and focuses weldering, its electronics
Bundle focus is not located at the bottom of keyhole thus the problem that can not give full play to keyhole, it is provided that Yi Zhong electricity
Son bundle zoom soldering method and system.
For solving the problems referred to above, the present invention is achieved by the following technical solutions:
A kind of electron beam zoom soldering method, according to speed of welding v of electron beam, selective focus exciting current I
Change frequency and focus on exciting current I change waveform so that keyhole along the welding direction speed of development with
Focus on exciting current I change frequency to tend to synchronizing, i.e. electron beam spot is always positioned at the bottom of keyhole or connects
The bottom of nearly keyhole.
Above-mentioned electron beam zoom soldering method, specifically includes step as follows:
Step 1: according to material and the weld seam longitudinal direction depth process requirement thereof of workpiece, by experience or expert's number
Beam power and speed of welding v is selected according to storehouse；
Step 2: according to longitudinal degree of depth of the weld seam of workpiece and the surface location of weld seam away from electron beam outlet
Height, determine higher limit Imax and the lower limit Imin of the focusing exciting current I of focusing arrangement；Its
Higher limit Imax of middle focusing exciting current I makes the focus of electron beam be positioned at weld seam high position G, and focusing is encouraged
The lower limit Imin of magnetoelectricity stream I makes the focus of electron beam be positioned at weld seam low level D；
Step 3: speed of welding v selected according to step 1, selective focus exciting current I change frequency,
Keyhole is made to tend to Tong Bu, i.e. along the welding direction speed of development with focusing on exciting current I change frequency
Electron beam spot is always positioned at the bottom of keyhole or close to the bottom of keyhole；
Step 4: selective focus exciting current I changes waveform；
Step 5: start electron-beam welder, is carried out welding until terminating by the welding condition selected.
In such scheme, weld seam high position G is at the upper surface of weld seam between the center line of weld seam, and weld seam is low
Position D at the center line of weld seam between the lower surface of weld seam.
A kind of electron beam zoom weldering system, including electron beam generator, focusing arrangement, focusing power supply, in
Centre control unit, benchtop supply and workbench；Central control unit and focusing power supply and benchtop supply
It is connected；Focusing power supply connects focusing arrangement winding；Benchtop supply connecting working table drives motor；
Central control unit, produces and focuses on exciting current I control instruction and movable workbench control instruction；
Produce control instruction and the running parameter detection of whole equipment of electron-beam welder simultaneously；
Electron beam generator, under the control of central control unit, produces controlled electron beam；
Focusing power supply, under the control of central control unit, produces controlled focusing exciting current I, should
Focus on exciting current I and be supplied to focusing arrangement winding；
Focusing arrangement, can converge in certain point i.e. focus by electron beam, and at controlled focusing exciting current I
Effect under produce variable focus exciting current I so that the focus of electron beam moves up and down；
Benchtop supply, under the control of central control unit, produces stage motor and drives power supply；
Workbench, carries workpiece, under the control of central control unit so that the weld seam on workpiece is even
Continue and pass through electron beam.
Compared with prior art, the present invention uses zoom to weld, keyhole along the welding direction speed of development with
Focus on exciting current I change frequency tend to synchronize, the focus of electron beam be always positioned at the bottom of keyhole (or
Close to bottom), beneficially keyhole is to longitudinal depth development.Same electron beam parameter uses zoom weldering
Deeper weld seam and higher welding seam deep width ratio can be obtained, be conducive to improving the welding performance of electron-beam welder.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of electron beam zoom weldering system.
Fig. 2 is the sectional view of workpiece in Fig. 1.
Fig. 3 is a kind of focusing exciting current I oscillogram.
Fig. 4 is the flow chart of electron beam zoom soldering method.
Labelling in figure: 1, electron beam generating apparatus；2, focusing arrangement；3, focusing power supply；4, central authorities
Control unit；5, benchtop supply；6, workbench；7, workpiece；71, weld seam；8, electron beam.
Detailed description of the invention
A kind of electron beam zoom weldering system, as it is shown in figure 1, include electron beam generator 1, focusing arrangement 2,
Focusing power supply 3, central control unit 4, benchtop supply 5 and workbench 6.
Electron beam generator 1: under central control unit 4 controls, electron beam generator 1 produces controlled
Electron beam 8.
Focusing arrangement 2: electron beam 8 is by, after focusing arrangement 2, converging in certain point (focus).
Focusing power supply 3: provide focusing arrangement 2 winding to focus on exciting current I, by central control unit 4
Control focusing exciting current I change just can control electron beam 8 focus and move up and down.
Central control unit 4: produce focusing exciting current I control instruction and workbench 6 moves control and refers to
Order；Produce control instruction and the running parameter detection of whole equipment of electron-beam welder simultaneously.
Benchtop supply 5: workbench 6 motor-driven power supply is provided.
Workbench 6: carrying workpiece 7, under central control unit 4 controls, the weld seam 71 on workpiece 7
Continue through electron beam 8.
A kind of electron beam zoom soldering method that above-mentioned electron beam zoom weldering system is realized, as shown in Figure 4,
Comprise the steps:
Step 1: according to material and the longitudinal depth process requirement of weld seam 71 thereof of workpiece 7, by experience or special
Family data base selects electron beam 8 power and speed of welding v.
Step 2: electric from electron gun according to the longitudinal degree of depth of the weld seam 71 of workpiece 7 and weld seam 71 surface location
The height in son bundle 8 exits, determines focusing exciting current I upper lower limit value.Wherein focus on exciting current I
The high-order G position of higher limit Imax correspondence electron beam 8 focus weld seam 71 in fig. 2, focus on exciting current
I lower limit Imin correspondence electron beam 8 focus weld seam 71 low level D position in fig. 2.G position is positioned at weld seam
71 longitudinal degree of depth upper surfaces are optional to the somewhere between center line, and D position is positioned at the longitudinal degree of depth center line of weld seam 71 extremely
Somewhere between lower surface is optional.
Step 3: speed of welding v selected according to step 1, selective focus exciting current I change frequency,
I.e. determine cycle T in Fig. 3 so that keyhole is along the welding direction speed of development and focuses on exciting current I
Change frequency tends to synchronizing, i.e. electron beam 8 focus is always positioned at (or the end close to keyhole, bottom of keyhole
Portion).
Step 4: selective focus exciting current I changes waveform, gives the poly-of a kind of sawtooth waveforms in Fig. 3
Burnt exciting current I waveform, it is possible to select the focusing exciting current I waveform of other waveform.
Step 5: start electron-beam welder, is carried out welding until terminating by the welding condition selected.
Claims (4)
1. an electron beam zoom soldering method, is characterized in that, according to the speed of welding of electron beam (8)
V, selective focus exciting current I change frequency and focusing exciting current I change waveform so that keyhole
Tend to Tong Bu along the welding direction speed of development with focusing on exciting current I change frequency, i.e. electron beam
(8) focus is always positioned at the bottom of keyhole or close to the bottom of keyhole.
A kind of electron beam zoom soldering method the most according to claim 1, is characterized in that, specifically
Comprise the steps:
Step 1: according to the longitudinal depth process requirement of the material of workpiece (7) and weld seam (71) thereof, by
Experience or expert database select electron beam (8) power and speed of welding v；
Step 2: according to longitudinal degree of depth and the surface of weld seam (71) of the weld seam (71) of workpiece (7)
Position, from the height in electron beam (8) exit, determines the focusing exciting current I of focusing arrangement (2)
Higher limit Imax and lower limit Imin；Higher limit Imax wherein focusing on exciting current I makes electricity
The focus of son bundle (8) is positioned at the high-order G of weld seam (71), focuses on the lower limit Imin of exciting current I
The focus making electron beam (8) is positioned at weld seam (71) low level D；
Step 3: according to speed of welding v that step 1 is selected, selective focus exciting current I changes frequency
Rate so that keyhole tends to same along the welding direction speed of development with focusing on exciting current I change frequency
Step, i.e. electron beam (8) focus are always positioned at the bottom of keyhole or close to the bottom of keyhole；
Step 4: selective focus exciting current I changes waveform；
Step 5: start electron-beam welder, is carried out welding until terminating by the welding condition selected.
A kind of electron beam zoom soldering method the most according to claim 2, is characterized in that, weld seam
(71) high-order G is positioned at the upper surface of weld seam (71) between the center line of weld seam (71), weld seam (71)
Low level D is positioned at the center line of weld seam (71) between the lower surface of weld seam (71).
4. a kind of electron beam zoom weldering system designed by method based on claim 1, its feature
It is to control single including electron beam generator (1), focusing arrangement (2), focusing power supply (3), central authorities
Unit (4), benchtop supply (5) and workbench (6)；Central control unit (4) and focusing power supply
And benchtop supply (5) (3)；Focusing power supply (3) connects focusing arrangement (2) winding；Work
Platform power supply (5) connecting working table (6) motor；
Central control unit (4), produces and focuses on exciting current I control instruction and workbench (6) shifting
Dynamic control instruction；Produce control instruction and the running parameter detection of whole equipment of electron-beam welder simultaneously；
Electron beam generator (1), under the control of central control unit (4), produces controlled electricity
Son bundle (8)；
Focusing power supply (3), under the control of central control unit (4), produces controlled focusing and encourages
Magnetoelectricity stream I, this focusing exciting current I are supplied to focusing arrangement (2) winding；
Focusing arrangement (2), can converge in certain point i.e. focus by electron beam (8), and controlled poly-
Under the effect of burnt exciting current I so that the focus of electron beam (8) moves up and down；
Benchtop supply (5), under the control of central control unit (4), produces motor-driven
Power supply；
Workbench (6), carrying workpiece (7), mobile by motor-driven workbench (6) so that
Weld seam (71) on workpiece (7) continues through electron beam (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610481336.3A CN105904078B (en) | 2016-06-24 | 2016-06-24 | Electron beam zoom soldering method and system |
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| CN201610481336.3A CN105904078B (en) | 2016-06-24 | 2016-06-24 | Electron beam zoom soldering method and system |
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| CN105904078B CN105904078B (en) | 2017-11-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110788466A (en) * | 2019-10-31 | 2020-02-14 | 中国航发南方工业有限公司 | Space three-dimensional curve continuous non-uniform zooming variable-section electron beam welding method |
| CN110788467A (en) * | 2019-10-31 | 2020-02-14 | 中国航发南方工业有限公司 | Space curve electron beam welding method |
| CN117733305A (en) * | 2024-02-20 | 2024-03-22 | 四川华束科技有限公司 | Sealed-off type electron gun and non-vacuum electron beam welding robot |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110788466A (en) * | 2019-10-31 | 2020-02-14 | 中国航发南方工业有限公司 | Space three-dimensional curve continuous non-uniform zooming variable-section electron beam welding method |
| CN110788467A (en) * | 2019-10-31 | 2020-02-14 | 中国航发南方工业有限公司 | Space curve electron beam welding method |
| CN110788467B (en) * | 2019-10-31 | 2021-11-26 | 中国航发南方工业有限公司 | Space curve electron beam welding method |
| CN110788466B (en) * | 2019-10-31 | 2021-11-30 | 中国航发南方工业有限公司 | Space three-dimensional curve continuous non-uniform zooming variable-section electron beam welding method |
| CN117733305A (en) * | 2024-02-20 | 2024-03-22 | 四川华束科技有限公司 | Sealed-off type electron gun and non-vacuum electron beam welding robot |
| CN117733305B (en) * | 2024-02-20 | 2024-04-26 | 四川华束科技有限公司 | Sealed-off type electron gun and non-vacuum electron beam welding robot |
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| CN105904078B (en) | 2017-11-17 |
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Address after: No. 5-1 Pioneer Industrial Park, Kungming West Road, Guilin City, Guangxi Zhuang Autonomous Region, 541004 Patentee after: Guilin Shida Technology Co.,Ltd. Address before: No. 5-1 Pioneer Industrial Park, Kungming West Road, Guilin City, Guangxi Zhuang Autonomous Region, 541004 Patentee before: GUILIN THD MECHANICAL & ELECTRICAL ENGINEERING CO.,LTD. |
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Effective date of registration: 20220719 Address after: 100101 building 21, Anyuan, Anhui Beili, Chaoyang District, Beijing Patentee after: SINOPEC ENGINEERING Inc. Patentee after: Guilin Shida Technology Co.,Ltd. Address before: No. 5-1 Pioneer Industrial Park, Kungming West Road, Guilin City, Guangxi Zhuang Autonomous Region, 541004 Patentee before: Guilin Shida Technology Co.,Ltd. |