CN104308342B - Center pulsed negative pressure arc-welding apparatus and method - Google Patents
Center pulsed negative pressure arc-welding apparatus and method Download PDFInfo
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- CN104308342B CN104308342B CN201410458968.9A CN201410458968A CN104308342B CN 104308342 B CN104308342 B CN 104308342B CN 201410458968 A CN201410458968 A CN 201410458968A CN 104308342 B CN104308342 B CN 104308342B
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- arc
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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
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/26—Accessories for electrodes, e.g. ignition tips
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to a kind of center pulsed negative pressure arc-welding apparatus and method, belong to welding equipment and method and technology field.Which passes through air extractor, makes hollow tube cathode inner chamber and forms periodic negative pressure state at arc center below, and when arc center is in atmospheric pressure state, arc shape is free arc shape；When arc center is in negative pressure state, under the compression of outer atmospheric pressure, electric arc is in restrain state；Electric arc is switched between free electric arc and constrained arc, realize center pulsed negative pressure arc-welding method.The pulsating arc that the welder and method are produced has vibration and stirring action for welding pool, makes liquid metal form tiny equiax crystal, it is suppressed that the formation of pore, improves the mechanical property of welding point.By the ripple frequency and dutycycle that adjust electric arc, it is possible to achieve for welding pool vibration and the precise control of stirring, welding penetration and heat input.
Description
Technical field
The present invention relates to be a kind of center pulsed negative pressure arc-welding apparatus and method, belong to welding equipment and method and technology
Field.
Background technology
Solder technology is developed so far, and the target of pursuit is high-quality, efficient and high speed.Welding pool as in welding process most
For a complicated process, for welding quality, welding efficiency and speed of welding suffer from important impact.Welding pool form
It is also often weld defect with behavior, the such as key factor of the generation such as pore, slag inclusion and weld crack.And the crystallization of welding pool
Process is even more the mechanical property of the quality and welding point that affect weld seam.Due to extremely complex in welding pool crystallization process,
Thick columnar dendrite is often readily formed, the mechanical property of weld seam is affected.Therefore, control the knot of welding pool metal
Crystalline substance, is to obtain one of important means of good welds joint.For these problems, there is scholar to propose earliest and welding workpiece is applied
Plus the mechanical vibration of certain frequency and amplitude, make molten bath produce certain forced oscillation, break the columnar dendrite for being easy to grow up,
Change the rise and fall of structure and Energy distribution in molten bath, reduce constitutional supercooling district, solidify to form tiny so as to control molten pool metal
Equiax crystal.This method, achieves certain effect.Additionally, some scholars have carried out the research of ultrasound-TIG weld technique, grind
Impact of the addition of ultrasound to welding pool is studied carefully.Viewpoint is：On the one hand, in transonic process, part energy is by liquid
Sorption enhanced is heat energy, and this results in the decay of ultrasonic amplitude, and acoustic pressure gradient from top to bottom is defined in molten bath, causes to melt
The higher liquid metal of temperature in pond increased welding penetration at a high speed to molten bath flows.On the other hand, ultrasound wave transmission
After in molten bath, strong stirring, convection current and effect of vibration can be produced to welding pool, cause the thick dendrite for growing
It is broken, make the equiax crystal to form tiny equiax crystal.
The content of the invention
It is an object of the invention to be easy to weld defect and the deficiency for producing in overcoming existing solder technology, there is provided a kind of
Center pulsed negative pressure arc-welding apparatus and method.The device and method operation is simple, can adapt to various welding surroundings, passes through
The electric arc of periodically pulsing is stirred to welding pool and oscillation action, into increase welding penetration, and can not only can be pressed down
The formation of thick columnar dendrite in welding pool crystallization process processed, while being also beneficial to the effusion of gas in molten bath, reduces
Gas pore in weld metal defect, greatly improves the quality of the mechanical property and weld seam of welding point.
For achieving the above object, the present invention is adopted the following technical scheme that.
A kind of center pulsed negative pressure arc-welding apparatus, it is characterised in that：Which includes：
Welding gun, is provided with hollow tube cathode in which；
Air extractor, its intracavity inter-connection with the hollow tube cathode make the inner chamber of hollow tube cathode and hollow
Arc center below hollow edged electrode forms negative pressure region.
The welder also includes pressure relief device, wherein, the air extractor passes through the pressure relief device
Connect with the hollow tube cathode, valve is provided with the pipeline for connecting the pressure relief device and the hollow tube cathode
Door.
Also include that, for measuring and showing the pressure relief device of pressure in the pressure relief device, the pressure shows
Device is connected with the pressure relief device.
The welding gun is non-melt pole welding gun.
A kind of center pulsed negative pressure arc-welding method, it is characterised in that：There is air extractor to hollow tube cathode
Gas piping, carries out pumping process to the pipeline by air extractor, makes hollow tube cathode inner chamber and below in electric arc
Periodic negative pressure state is formed at the heart, when arc center is in atmospheric pressure state, arc shape is free arc shape；Work as electricity
When arc center is in negative pressure state, under the compression of outer atmospheric pressure, arc shape is made to be restrain state；So as to establish center
Pulsed negative pressure electric arc.
The welding method, it is characterised in that：Periodically open the shut-off valve, make hollow tube cathode inner chamber and
Form periodic negative pressure state below at arc center.
In welding process, the ripple frequency of center pulsed negative pressure electric arc can be regulated and controled.
Compared with prior art, the advantage of the inventive method is as follows：
Center pulsed negative pressure electric arc produced by welder of the present invention and method, can realize stirring welding pool
Dynamic and vibration, not only can suppress the formation of thick columnar dendrite, make molten pool metal crystallize the equiax crystal to form fine uniform,
And the effusion of gas in molten bath is also helped, it is difficult to form pore, improves the mechanical property of welding point.Additionally, when electricity
When arc is in contained form, the energy density and electric arc penetration power of electric arc are significantly higher than free electric arc, serve increase welding
The effect of fusion penetration.
Description of the drawings
Fig. 1 is this welding method implementation schematic diagram.
Fig. 2 is the sequential chart that valve is opened and closed.
In figure：1st, the source of welding current and its control system, 2, non-melt pole welding gun, 3, hollow tube cathode, 4, welding workpiece,
5th, air extractor, 6, gas-guide pipeline A, 7, pressure relief device, 8, pressure relief device, 9, gas-guide pipeline B, 10, valve, 11,
Gas-guide pipeline C, 12, jointing, 13, welding cable A, 14, welding cable B, 15, free electric arc, 16, constrained arc.
Specific embodiment
Embodiments of the present invention are specifically described below with reference to accompanying drawing.It is illustrated in figure 1 this welding method implementation
Schematic diagram, the center pulsed negative pressure arc-welding apparatus mainly include the source of welding current and its control system 1, non-melt pole welding gun 2,
Hollow tube cathode 3, welding workpiece 4, air extractor 5, pressure relief device 7, pressure relief device 8, valve 10, wherein being evacuated
--- --- --- gas-guide pipeline B 9 --- valve 10 --- the gas-guide pipeline C of pressure relief device 7 of gas-guide pipeline A 6 of device 5
11 --- jointing 12 --- hollow tube cathode 3 constitutes a gas-guide pipeline, pressure relief device 8 and pressure relief device
7 are connected, the source of welding current and its --- welding cable B 14 --- welding workpiece 4 --- non-melt pole welding gun of control system 1
2 --- the welding cable A 13 --- sources of welding current and its control system 1, constitute a road electric loop, the relevant weldering of the welding method
The necessary gas circuit of rifle and water route connection method are all conventional connections.So it will not be described.
The step of with reference to Fig. 1 to the welder and method, is described in detail：
First, will be welding workpiece 4 and the welding wire for matching ready, non-melt pole welding gun 2 is just being in welding workpiece 4
The suitable position in top, in the side of welding gun, necessary to welding gun, gas circuit and water route conventionally connect wire feeder, it is ensured that
--- --- --- gas-guide pipeline B 9 --- valve 10 --- airways of pressure relief device 7 of gas-guide pipeline A 6 of air extractor 5
Road C11 --- jointing 12 --- hollow tube cathode 3 this correct all the way connect, it is ensured that valve 10 is closed down,
Start air extractor 5, pumped down process is carried out to pressure relief device 7.Observation pressure relief device 8, until pressure discharges
Pressure in device 7 reaches default negative pressure value.Now, high-frequency arc strike is started by the source of welding current and its control system 1, hollow
Free electric arc 15 can be formed between hollow edged electrode 3 and welding workpiece 4.After free electric arc 15 is stable, by the source of welding current and its
The control of control system 1 control valve 10 is periodically opened and is closed, and when valve 10 is closed, electric arc is freely electricity
Arc 15, when valve 10 is in opening state, electric arc is constrained arc 16, so that electric arc is in free electric arc 15 and constrained arc
Periodically switch between 16, set up center pulsed negative pressure electric arc.
In welding process, the frequency that can be opened by changing valve 10 as shown in Figure 2 and be closed is changed with dutycycle
Become the time of ripple frequency and each arc shape arcing in a cycle of center pulsed negative pressure electric arc.So as to realize butt welding
Connect the precise control of Bath vibration and stirring, welding penetration and heat input.
Claims (5)
1. a kind of center pulsed negative pressure arc-welding apparatus, it is characterised in that：Which includes：
Welding gun, is provided with hollow tube cathode in which；
Air extractor, its intracavity inter-connection with the hollow tube cathode make the inner chamber and hollow tubular of hollow tube cathode
The arc center of base part forms negative pressure region；Which also includes pressure relief device, wherein, the air extractor is by described
Pressure relief device is connected with the hollow tube cathode, is connecting the pressure relief device and the hollow tube cathode
Pipeline is provided with valve；Which is also included for measuring and showing the pressure relief device of pressure in the pressure relief device, institute
State pressure relief device to be connected with the pressure relief device.
2. a kind of center pulsed negative pressure arc-welding apparatus according to claim 1, it is characterised in that：The welding gun is non-
Melting pole gun.
3. a kind of center pulsed negative pressure arc-welding apparatus according to claim 1, it is characterised in that：It is periodically open-minded
The valve is turned off, and is made hollow tube cathode inner chamber and periodic negative pressure state is formed at arc center below.
4. a kind of center pulsed negative pressure arc-welding method, it is characterised in that：There is the gas of air extractor to hollow tube cathode
Body pipeline, carries out pumping process to the pipeline by air extractor, makes hollow tube cathode inner chamber and arc center below
Place forms periodic negative pressure state, and when arc center is in atmospheric pressure state, arc shape is free arc shape；Work as electric arc
When center is in negative pressure state, under the compression of outer atmospheric pressure, arc shape is made to be restrain state；So as to establish center arteries and veins
Dynamic negative pressure electric arc.
5. a kind of center pulsed negative pressure arc-welding method according to claim 4, it is characterised in that：In welding process,
The ripple frequency of center pulsed negative pressure electric arc can be regulated and controled.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410458968.9A CN104308342B (en) | 2014-09-10 | 2014-09-10 | Center pulsed negative pressure arc-welding apparatus and method |
| PCT/CN2014/088499 WO2016037393A1 (en) | 2014-09-10 | 2014-10-13 | Central negative-pressure electric arc welding apparatus and method |
| US14/865,491 US20160067811A1 (en) | 2014-09-10 | 2015-09-25 | Central negative pressure arc welding apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410458968.9A CN104308342B (en) | 2014-09-10 | 2014-09-10 | Center pulsed negative pressure arc-welding apparatus and method |
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| Publication Number | Publication Date |
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| CN104308342A CN104308342A (en) | 2015-01-28 |
| CN104308342B true CN104308342B (en) | 2017-04-05 |
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| CN201410458968.9A Active CN104308342B (en) | 2014-09-10 | 2014-09-10 | Center pulsed negative pressure arc-welding apparatus and method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537723B (en) * | 2016-01-12 | 2017-11-24 | 北京工业大学 | Double hollow cathode swing arc welding methods |
| CN105436672B (en) * | 2016-01-12 | 2017-12-08 | 北京工业大学 | A kind of hollow cathode ring-type negative pressure arc-welding method |
| CN105499765B (en) * | 2016-01-12 | 2017-12-15 | 北京工业大学 | Consumable electrode ring-type negative pressure arc-welding method |
| CN107790886B (en) * | 2017-09-15 | 2019-09-17 | 哈尔滨工业大学（威海） | Pulsed negative pressure formula laser enhancing KTIG and MIG composite welding apparatus and method |
| CN107685193A (en) * | 2017-09-15 | 2018-02-13 | 哈尔滨工业大学（威海） | Pulsed negative pressure laser enhancing type lockhole TIG weld device |
| CN110340498A (en) * | 2019-07-16 | 2019-10-18 | 西南交通大学 | Hollow ring tungsten electrode GTA array silk filling increasing material manufacturing method and device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1220163A (en) * | 1967-06-12 | 1971-01-20 | Chambersburg Eng Co | Mechanical-pneumatic servo control system for high speed impact devices |
| GB1313128A (en) * | 1971-05-03 | 1973-04-11 | Centrul De Sudura Si Incercari | Plasma arc generator |
| CN1065420A (en) * | 1991-03-29 | 1992-10-21 | 机械电子工业部哈尔滨焊接研究所 | New-type non-vacuum electronic beam connects method and welding torch |
| CN2693399Y (en) * | 2004-05-25 | 2005-04-20 | 西安松立焊接工程自动化有限责任公司 | Multifunctional vacuum brazing mechanism |
| JP2008147011A (en) * | 2006-12-09 | 2008-06-26 | Toshiba Plant Systems & Services Corp | Arc generation device and arc generation method in vacuum |
| CN102642085A (en) * | 2012-04-01 | 2012-08-22 | 上海交通大学 | Plasma-side-suction negative pressure device for laser welding |
| CN203765141U (en) * | 2014-02-20 | 2014-08-13 | 河南科技大学 | Multi-pulse digital control type electric spark deposition surfacing power supply |
-
2014
- 2014-09-10 CN CN201410458968.9A patent/CN104308342B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1220163A (en) * | 1967-06-12 | 1971-01-20 | Chambersburg Eng Co | Mechanical-pneumatic servo control system for high speed impact devices |
| GB1313128A (en) * | 1971-05-03 | 1973-04-11 | Centrul De Sudura Si Incercari | Plasma arc generator |
| CN1065420A (en) * | 1991-03-29 | 1992-10-21 | 机械电子工业部哈尔滨焊接研究所 | New-type non-vacuum electronic beam connects method and welding torch |
| CN2693399Y (en) * | 2004-05-25 | 2005-04-20 | 西安松立焊接工程自动化有限责任公司 | Multifunctional vacuum brazing mechanism |
| JP2008147011A (en) * | 2006-12-09 | 2008-06-26 | Toshiba Plant Systems & Services Corp | Arc generation device and arc generation method in vacuum |
| CN102642085A (en) * | 2012-04-01 | 2012-08-22 | 上海交通大学 | Plasma-side-suction negative pressure device for laser welding |
| CN203765141U (en) * | 2014-02-20 | 2014-08-13 | 河南科技大学 | Multi-pulse digital control type electric spark deposition surfacing power supply |
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| CN104308342A (en) | 2015-01-28 |
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