CN109848519A - A kind of four pulse novel welding method of robot double wire - Google Patents
A kind of four pulse novel welding method of robot double wire Download PDFInfo
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- CN109848519A CN109848519A CN201811450725.5A CN201811450725A CN109848519A CN 109848519 A CN109848519 A CN 109848519A CN 201811450725 A CN201811450725 A CN 201811450725A CN 109848519 A CN109848519 A CN 109848519A
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- pulse
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Abstract
The invention discloses a kind of four pulse novel welding methods of robot double wire, the robot includes control unit, wire feed component, the two pulse welding power supplys and welding gun mutually communicated, the method includes two root wires are stretched to welding position by wire feed component in tandem at a certain angle；The control unit controls described two pulse welding power supplys so that the electric current that silk provides forward is greater than the electric current that silk provides backward；And the control unit controls the wire feed component also to provide preceding silk and the identical or different wire feed rate of rear silk, and the control pulse welding power supply using four independent pulses with to welding wire offer welding current.Method control range of the invention is wide, and welding effect aesthetic qualities are high.
Description
Technical field
The present invention relates to double wire welding technical fields, in particular to a kind of four pulse novel welding of robot double wire
Method.
Background technique
The prior art, which is included in, to be generated electric arc between consumable electrode (hereinafter referred to as welding welding wire) and base material and forms molten bath,
And filler wire is inserted into the Double-wire welding method that the molten bath is welded.In the Double-wire welding method, due to weldering
The molten metal for connecing welding wire applies the molten metal of filler wire, thus increases molten metal amount, therefore can carry out high deposition and height
The welding of speed.Especially, when carrying out high-speed welding using Double-wire welding method, become humping weld in order to prevent
(humpingbead), it is important that make filler wire after consumable electrode electric arc with molten bath it is short-circuit fed.This be because
To be melted if filler wire is fed in consumable electrode electric arc, molten bath is almost uncolled and due to can not also utilize
Filler wire constrains the latter half of protuberance in molten bath, therefore the effect for inhibiting humping weld is not achieved.In contrast, if making filler wire
With the molten bath of electric arc peripheral part it is latter half of it is short-circuit fed, and melted using the heat in molten bath, then molten bath is cold
But and using filler wire inhibit molten bath latter half of, so as to inhibit the formation of humping weld.Thus, in the prior art
Double-wire welding method in, with cooling state and molten bath short circuit and to filler wire no power electric current, thus can be cold
But molten bath.In Double-wire welding method, as the method for generating electric arc between welding welding wire and base material, it is able to use titanium dioxide
Arc, carbon welding, metal active gas arc welding connection (metalactivegaswelding), Metallic Inert Gas protection
The various fusings electricity of arc-welding process (metalinertgaswelding), pulse arc welding connection, alternating current arc welding etc.
Pole formula arc-welding process.General pulse arc welding connection is that pulse mariages couples control technology, by two root wires by certain
Angle is placed in a specially designed welding gun, two root wires, two power supply power supplies by mutually communicating respectively.Pulse mariages
Two welding machines of coupling welding are typically set at master slave mode, using pulsed arc, to reduce influence of the electric arc to the droplet transfer,
By the coordinated control between two sources of welding current, following three kinds of bond patterns (Fig. 2) may be implemented.Synchronous mode, two electricity
Arc reaches maximum value simultaneously, advantageously forms biggish fusion penetration, but it is larger to splash, general seldom to use；Alternate mode, electric arc
Interaction force only has a quarter when common welding even lower, and the influence to the droplet transfer is smaller, particularly suitable for light
The welding of metal can substantially reduce spatter；Stochastic model both can significantly reduce the active force of electric arc, reduces and splashes, and energy
It realizes biggish fusion penetration, faster speed of welding can be obtained when welding the heavier metals such as steel, but since two pulses are believed
It is number random to occur, therefore welding process does not have alternate mode to stablize.
And the invention is intended to provide a kind of improved pulse electric arc welding technique, i.e., a kind of novel four arteries and veins of robot double wire
Rush novel welding method.
The aforementioned discussion of background technique is intended merely to be easy to understand the present invention.The material referred to is not approved or is recognized in this discussion
Any one of be in the priority date of the application or be once public common sense a part.
Summary of the invention
The invention proposes a kind of four pulse novel welding method of robot double wire, the robot include control unit,
Wire feed component, two mutually communicated pulse welding power supply and welding gun, the method includes,
Two root wires are stretched to welding position by wire feed component in tandem at a certain angle；
The control unit controls described two pulse welding power supplys so that the electric current that silk provides forward is greater than silk backward
The electric current of offer；
And the control unit controls the wire feed component also to provide preceding silk and rear silk is identical or different send
Silk speed, and the pulse welding power supply is controlled using four independent pulses to provide welding current to the welding wire.
Preferably, wherein the control unit is SCM system.
Preferably, material, diameter, the wire feed rate of two root wire are same or different.
Preferably, the wire feed rate of two root wire is varied so that two root wire alternately enters welding pool.
Preferably, four independent pulses include at least a high-frequency impulse.
Preferably, four independent pulses include at least a low-frequency pulse and/or a medium-frequency pulse.
Preferably, the frequency of four independent pulses changes with wire feed rate.
Technical effect of the invention at least that:
1. expanding electric current use scope；
2. controllable droplet transfer and pool size, are conducive to all-position welding；
3. heat input can be effectively controlled, improve joint performance；
4. appearance of weld is beautiful；
5. increasing welding point gap；
6. reducing crack sensitivity；
7. increasing penetration ability.
Detailed description of the invention
From following description with reference to the accompanying drawings it will be further appreciated that the present invention.Component in figure is not drawn necessarily to scale,
But it focuses on and shows in the principle of embodiment.In different views, identical appended drawing reference specifies corresponding part.
Fig. 1 is four pulse novel welding structure schematic diagram of robot double wire of the invention.
Fig. 2 is the pulse current schematic diagram of the prior art.
Specific embodiment
In order to enable the objectives, technical solutions, and advantages of the present invention are more clearly understood, below in conjunction with embodiment and figure
1, the present invention will be described in further detail；It should be appreciated that described herein, the specific embodiments are only for explaining the present invention,
It is not intended to limit the present invention.To those skilled in the art, consult it is described in detail below after, the present embodiment its
Its system, method and/or feature will become obvious.All such additional systems, method, feature and advantage are intended to all to wrap
It includes in this specification, be included within the scope of the invention, and by the protection of the appended claims.Described in detail below
Describe the other feature of the disclosed embodiments, and these characteristic roots according to it is described in detail below will be apparent
's.
Embodiment one
The present embodiment proposes a kind of four pulse novel welding method of robot double wire, and the robot includes control unit
Part, wire feed component, the two pulse welding power supplys and welding gun mutually communicated, the method includes, wire feed components by two root beads
Silk stretches to welding position in tandem at a certain angle；The control unit control described two pulse welding power supplys so as to
The electric current that preceding silk provides is greater than the electric current that silk provides backward；And the control unit controls the wire feed component also to mention
For the identical or different wire feed rate of preceding silk and rear silk, and the control pulse welding power supply using four independent pulses with
Welding current is provided to the welding wire.
Wherein the control unit is SCM system.The material of two root wires described in the present embodiment, diameter, wire feed speed
It spends same or different.The wire feed rate of two root wire is varied so that two root wire alternately enters welding pool.
Four independent pulses include at least a high-frequency impulse.Four independent pulses include at least a low-frequency pulse
An and/or medium-frequency pulse.The frequency of four independent pulses changes with wire feed rate.
Embodiment two
The present embodiment proposes a kind of four pulse novel welding method of robot double wire, and the robot includes control unit
Part, wire feed component, the two pulse welding power supplys and welding gun mutually communicated, the method includes, wire feed components by two root beads
Silk stretches to welding position in tandem at a certain angle；The control unit control described two pulse welding power supplys so as to
The electric current that preceding silk provides is greater than the electric current that silk provides backward；And the control unit controls the wire feed component also to mention
For the identical or different wire feed rate of preceding silk and rear silk, and the control pulse welding power supply using four independent pulses with
Welding current is provided to the welding wire.
Wherein the control unit is SCM system.The material of two root wires described in the present embodiment, diameter, wire feed speed
Degree can be different.The wire feed rate of two root wire is varied so that two root wire alternately enters welding pool.It is described
Four independent pulses include at least two high-frequency impulses, a low-frequency pulse, a medium-frequency pulse.Four independent arteries and veins
The frequency of punching changes with wire feed rate.
This mariages couples four pulse welding processes and mainly optimizes in following aspect welding parameters:
1. expanding electric current use scope
For the welding wire of certain diameter, traditional MIG welding either still uses short circuiting transfer using jet stream, is used
Electric current be all conditional, and four pulse MIC weldings are by the cooperation of pulse parameter, can strobe pulse in the larger context
Electric current makes welding current range further expansion, while can be in lesser electric current (when average current is less than continuous current welding
Critical current) under realize stable spray transfer, as long as guarantee pulse current be higher than critical jet stream electric current, both may be used in this way
To weld slab, base material penetration situation when can also weld thin plate, and weld thin plate is connected than short circuit transition welding.It is more meaningful
, thicker welding wire can be used to weld thin plate, this brings great convenience to welding procedure, and crin wire feed is relatively first
Be it is easy, the most advantageous to soft welding wire (aluminium, copper etc.), secondly, the straight and upright property of crin is good, welding wire direction is not easy beat, is easy to protect
It holds on axis of a weld, in addition, the price of crin is lower than filament, production cost can be reduced, and specific surface area is small, can make to produce
The tendency in angry hole reduces；
2. controllable droplet transfer and pool size, are conducive to all-position welding
It in downhand position by the adjustment of pulse parameter, carries out the droplet transfer according to desired mode, is carrying out sky
Between position weld seam weld when, since pulse current is big, make the droplet transfer have stronger directionality, be conducive to molten drop along electric arc axis
Line smoothly transits in molten bath, and since average pulse electric current is small, being formed by molten bath volume also can be smaller, along with pulse plus
Heat and droplet transfer are discontinuity, so molten pool metal is also unlikely to trickle even at vertical position of welding, are maintained molten
The stability of pond state；
3. heat input can be effectively controlled, improve joint performance
Material biggish for heat sensitivity, such as aluminium alloy, magnesium alloy are adjusted defeated to the heat of base material by average current
Enter or weld heat input, reduce weld metal and the superheating phenomenon of heat affected area, to improve the performance of connector, reduces crackle
Tendentiousness, in addition, the strong melting bath stirring effect of four pulses can prevent molten bath from occurring unidirectionally spitting crystallization and coarse grains, and
The segregation of composition of weld line is conducive to improve Weld Performance；
4. appearance of weld is beautiful
Though using low-frequency pulse TIG weldering also available beautiful fish scale-shaped weld appearance, its productivity is low, often difficult
In the requirement for meeting large-scale production, using four pulse MIC welding methods, four pulse frequencies are adjusted according to speed of welding,
While to beautiful fish scale-shaped weld appearance, moreover it is possible to guarantee higher welding production efficiency；
5. increasing welding point gap
Compared with the welding of general pulse MIC, the solderable connector interstice coverage of four pulse MICs welding is bigger, the scope of application
It is wider；
6. reducing crack sensitivity
The average grain size of general pulse MIC welding is larger, is also easy to produce solidification cracking, and crack sensitivity is up to 70% left side
The right side, when being welded using four pulse MICs, crack sensitivity is substantially reduced；
7. increasing penetration ability
Four pulse MIC welding of direct current compares traditional pulse compared with traditional pulse MIG, by adjusting four pulse currents and can obtain
MIG welds bigger penetration ability, this greatly facilitates the welding of medium-thick plate.
The above analysis couples MIG welding technique using four pulse direct current of mariages, can be right at following two aspect
Conventional bonding technique improves:
1. carrying out accurate heat input control.Due to the addition of low pulse, the adjustable technological parameter of four pulse MIC weldings increases
More, range increases, and under certain average welding current, can obtain different mode of metal transfer by adjusting pulse parameter
Welding effect, and whole heat input is still in reduced levels, this is to the materials such as the stronger material of heat sensitivity, especially aluminium, magnesium
Welding it is especially important；
2. having strong melting bath stirring effect.The stirring action in molten bath is mainly the variation and molten drop pair due to arc force
Caused by the impact in molten bath.In traditional pulse MIG weldering, arc force only has a kind of variation with the pulsation of electric current, that is, works as electric current
When in during lower base value, arc force is smaller, when during the peak value of pulse that electric current is in transition molten drop, arc force compared with
Greatly, the arc force of this pulse, which acts on, just generates mixing effect on molten bath.In addition, the droplet transfer during tradition MIG weldering
And molten bath is impacted with a fixed frequency, and during four pulse MIC weldings, due to the addition of low pulse, the pulsation of electric current
A kind of variations more than traditional pulse MIG weldering, i.e. electric current have base value, low pulse peak, the variation of three kinds of high impulse peak, thus embody
It has changed also mostly one kind on arc force, bigger than during low pulse in the arc force during high impulse, the stirring to molten bath
Effect is also eager to excel.When carrying out the welding of almag using four pulse MIC welding methods, its droplet transfer during height pulse
All guarantee in the range of spray transfer, molten drop transition frequency is faster than during low pulse during high impulse, rushes to molten bath
The effect of hitting is stronger, what makes more sense is that, high magnesium alloy MIG welds STUDY ON THE WELDING, the synthesis result of the various effects of low pulse
The effect of cooperative reinforcing can be exactly generated, the strong melting bath stirring effect of four pulses reduces gas to big weld penetration is obtained
Hole refines crystal grain, reduces crack sensitivity, reduces component segregation, improves joint mechanical property and plays very crucial effect.
Although describing the present invention by reference to various embodiments above, but it is to be understood that of the invention not departing from
In the case where range, many changes and modifications can be carried out.That is methods discussed above, system or equipment etc. show
Example.Various configurations can be omitted suitably, replace or add various processes or component.For example, in alternative configuration, can with
Described order in a different order executes method, and/or can add, and omits and/or combine the various stages.Moreover, about
The feature of certain configuration descriptions can be combined with various other configurations.Can combine in a similar way configuration different aspect and
Element.In addition, many elements are only range of the example without limiting the disclosure or claims with the development of technology.
Give detail in the description to provide to the thorough understanding for including the exemplary configuration realized.However,
Configuration can be practiced without these specific details for example, having been illustrated with well-known circuit, process, calculation
Method, structure and technology are without unnecessary details, to avoid fuzzy configuration.The description only provides example arrangement, and unlimited
The scope of the claims processed, applicability or configuration.It is used on the contrary, front will provide the description of configuration for those skilled in the art
Realize the enabled description of described technology.It, can be to the function of element without departing from the spirit or the scope of the present disclosure
It can and arrange and carry out various changes.
In addition, many operations can be in parallel or concurrently although each operation can describe the operations as sequential process
It executes.Furthermore it is possible to rearrange the sequence of operation.One process may have other steps.Furthermore, it is possible to pass through hardware, soft
Part, firmware, middleware, code, hardware description language or any combination thereof carry out the example of implementation method.When software, firmware, in
Between when realizing in part or code, program code or code segment for executing necessary task can store in such as storage medium
In non-transitory computer-readable medium, and described task is executed by processor.
To sum up, be intended to foregoing detailed description be considered as it is illustrative and not restrictive, and it is to be understood that described
Claim (including all equivalents) is intended to limit the spirit and scope of the present invention.The above embodiment is interpreted as only using
In illustrating the present invention rather than limit the scope of the invention.After the content for having read record of the invention, technology
Personnel can make various changes or modifications the present invention, these equivalence changes and modification equally fall into the claims in the present invention and limited
Fixed range.
Claims (7)
1. a kind of four pulse novel welding method of robot double wire, the robot includes control unit, wire feed component, phase intercommunication
The two pulse welding power supplys and welding gun of news, which is characterized in that the method includes,
Two root wires are stretched to welding position by wire feed component in tandem at a certain angle；
The control unit controls described two pulse welding power supplys so that the electric current that silk provides forward is provided greater than silk backward
Electric current；
And the control unit also control the wire feed component with provide preceding silk and rear silk it is identical or different wire feed speed
Degree, and the pulse welding power supply is controlled using four independent pulses to provide welding current to the welding wire.
2. four pulse novel welding method of robot double wire as described in claim 1, which is characterized in that the wherein control unit
Part is SCM system.
3. four pulse novel welding method of robot double wire as described in claim 1, which is characterized in that two root wire
Material, diameter, wire feed rate are same or different.
4. four pulse novel welding method of robot double wire as described in claim 1, which is characterized in that two root wire
Wire feed rate is varied so that two root wire alternately enters welding pool.
5. four pulse novel welding method of robot double wire as described in claim 1, which is characterized in that described four independent
Pulse includes at least a high-frequency impulse.
6. four pulse novel welding method of robot double wire as described in claim 1, which is characterized in that described four independent
Pulse includes at least a low-frequency pulse and/or a medium-frequency pulse.
7. four pulse novel welding method of robot double wire as described in claim 1, which is characterized in that described four independent
The frequency of pulse changes with wire feed rate.
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| CN201811450725.5A CN109848519B (en) | 2018-11-30 | 2018-11-30 | Novel robot double-wire four-pulse welding method |
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Cited By (3)
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| CN111037047A (en) * | 2019-12-06 | 2020-04-21 | 西安铂力特增材技术股份有限公司 | Efficient forming device for electric arc additive manufacturing |
| CN113857620A (en) * | 2021-10-25 | 2021-12-31 | 天津新松机器人自动化有限公司 | Robot double-wire welding method |
| CN115070173A (en) * | 2022-07-09 | 2022-09-20 | 南京理工大学 | Superaudio pulse square wave MIG assisted three-wire electric arc additive manufacturing method |
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