CN105364264A - Molten pool liquid level control method for resonant mode short circuiting transfer - Google Patents

Molten pool liquid level control method for resonant mode short circuiting transfer Download PDF

Info

Publication number
CN105364264A
CN105364264A CN201510805830.6A CN201510805830A CN105364264A CN 105364264 A CN105364264 A CN 105364264A CN 201510805830 A CN201510805830 A CN 201510805830A CN 105364264 A CN105364264 A CN 105364264A
Authority
CN
China
Prior art keywords
voltage
short circuiting
welding wire
resonant mode
welding
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.)
Granted
Application number
CN201510805830.6A
Other languages
Chinese (zh)
Other versions
CN105364264B (en
Inventor
蔡立民
袁荣勤
王洪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHENGDU HUAYUAN ELECTRIC EQUIPMENT Co Ltd
Original Assignee
CHENGDU HUAYUAN ELECTRIC EQUIPMENT Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CHENGDU HUAYUAN ELECTRIC EQUIPMENT Co Ltd filed Critical CHENGDU HUAYUAN ELECTRIC EQUIPMENT Co Ltd
Priority to CN201510805830.6A priority Critical patent/CN105364264B/en
Publication of CN105364264A publication Critical patent/CN105364264A/en
Application granted granted Critical
Publication of CN105364264B publication Critical patent/CN105364264B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B23K9/095—Monitoring or automatic control of welding parameters
    • 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
    • B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding Control (AREA)

Abstract

The invention discloses a molten pool liquid level control method for resonant mode short circuiting transfer. Under the condition that current is larger than 40 A and smaller than 300 A, the change rate Di/Dt of current flowing through a welding wire equals to K*(D+K1)<2>*Ia/(Va-K2)(A/mS), wherein K is a constant and ranges from 1.2 to 1.5, D is the diameter of the welding wire, K1 is a correction value and ranges from 0.4 to 0.7, Ia is the current flowing through the welding wire, Va is voltage at the two ends of the welding wire, K2 is a correction value and ranges from 12 to 16.

Description

The bath surface control method of resonant mode short circuiting transfer
Technical field
The present invention relates to welding method field, specifically, relate to a kind of bath surface control method of resonant mode short circuiting transfer.
Background technology
Short circuiting transfer is mainly used in metal arc welding.When short circuiting transfer refers to and adopts small electric stream and low-voltage welding, molten drop just directly contacts with molten bath before not departing from welding wire termination, the instantaneous extinguishing short circuit of electric arc, is transitioned in molten bath under the surface tension effects of the electromagnetic contractile force that molten drop produces at short circuit current, gravity and liquid metals.Resonant mode short circuiting transfer is a kind of phenomenon.Work study shows, in welding process, has the weld seam of resonant mode short circuiting transfer, and the hem width of weld seam is even, and scalelike mark is fine and closely woven, and fusion penetration uniformity is better, and the defect of weld seam is few, and splash low, have high welding quality, its welding effect as shown in Figure 1.But in welding process, resonant mode short circuiting transfer phenomenon is not recurrent.So, research and develop a kind of continuing in welding process and keep the method for resonant mode short circuiting transfer phenomenon to be extremely necessary to improve welding quality.
Summary of the invention
The present invention provides a kind of bath surface control method of resonant mode short circuiting transfer in order to solve the problems of the technologies described above, realize the short circuiting transfer within the scope of total current, improves welding quality.
Fig. 2 is resonant mode short circuiting transfer schematic diagram, and molten bath is positioned at the opposite direction of welding direction, under the acting in conjunction of arc force and magneto-restrictive power and molten drop gravity, accelerates liquid state molten pool distally to movement, as shown in A figure in Fig. 2; Under surface tension effects, regularly reflux in molten bath, as shown in B figure in Fig. 2; And be in height connected to and send constantly into and the welding wire end of dissolving, now molten drop is grown up, as shown in C figure in Fig. 2, current-rising-rate now will ensure within a rational time, ensure the temperature in molten bath, and provide the electric current of molten bath and welding wire separate type, the size of this electric current, must be that the rational magneto-restrictive power of generation is necessary.
Resonant mode short circuiting transfer phenomenon and dry extension of electrode, arc voltage, electric current, wire feed rate etc. are closely related, and in order to realize above-mentioned phenomenon, the technical scheme that inventor adopts is:
When electric current is greater than 40A and is less than 300A, the current changing rate Di/Dt flowing through welding wire is:
Di/Dt＝K*（D+K 1） ２*Ia/（Va-K 2）（A／mS）；
Wherein:
K is constant, and its span is 1.2-1.5;
D is gage of wire;
K 1for correction value, its span is 0.4-0.7;
The electric current of what Ia was flow through welding wire;
Va is the voltage of welding wire end to workpiece two ends;
K 2for correction value, its span is 12-16.
As preferably, the value of described K is 1.33.
Further, the span of described K1 is 0.4-0.6.
Further, the span of described K2 is 13-15.
To sum up, the invention has the beneficial effects as follows: utilize method of the present invention, can be implemented in the resonant mode short circuiting transfer phenomenon of 40A to 300A, solve the FR problem of implementation of short circuiting transfer, improve welding quality.
Accompanying drawing explanation
Fig. 1 is the welding effect figure of existing solder technology.
Fig. 2 is resonant mode short circuiting transfer schematic diagram.
Fig. 3 is gage of wire when being 0.8mm, electric current I a=100A, voltage Va=19V, voltage when not improving, current waveform figure;
Fig. 4 is gage of wire when being 0.8mm, electric current I a=100A, voltage Va=19V, the voltage after improvement, current waveform figure.
Fig. 5 is gage of wire when being 0.8mm, electric current I a=160A, voltage Va=21V, voltage when not improving, current waveform figure;
Fig. 6 is gage of wire when being 0.8mm, electric current I a=160A, voltage Va=21V, the voltage after improvement, current waveform figure.
Fig. 7 is gage of wire when being 0.8mm, electric current I a=180A, voltage Va=24V, voltage when not improving, current waveform figure;
Fig. 8 is gage of wire when being 0.8mm, electric current I a=180A, voltage Va=24V, the voltage after improvement, current waveform figure.
Fig. 9 is gage of wire when being 1.0mm, electric current I a=110A, voltage Va=19V, voltage when not improving, current waveform figure;
Figure 10 is gage of wire when being 1.0mm, electric current I a=110A, voltage Va=19V, the voltage after improvement, current waveform figure.
Figure 11 is gage of wire when being 1.0mm, electric current I a=180A, voltage Va=20V, voltage when not improving, current waveform figure;
Figure 12 is gage of wire when being 1.0mm, electric current I a=180A, voltage Va=20V, the voltage after improvement, current waveform figure;
Figure 13 is gage of wire when being 1.0mm, electric current I a=210A, voltage Va=22V, voltage when not improving, current waveform figure;
Figure 14 is gage of wire when being 1.0mm, electric current I a=210A, voltage Va=22V, the voltage after improvement, current waveform figure.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The gas protecting welding wire of fusing is one after another drop of under gravity, magneto-restrictive power, surface tension effects flows to molten bath, and liquid state molten pool liquid level is in periodically dipping and heaving fluctuation.Its intrinsic frequency of the motion of bath surface is certain.Molten bath is larger, and its intrinsic frequency is lower.Utilize droplet size, the intrinsic frequency in arcing pulsating current and molten bath " is in step with ", sets up the molten bath molten drop of total current scope and the resonator system of arcing pulsating current, shaping to reach low spatter, excellent welding penetration and weld appearance.
In welding process, wire feed rate can have an impact to system.Wire feed rate is faster, and the frequency beated in required molten bath is also higher; Frequency is higher, and the power of wire feed wants corresponding increase; In welding, wire feed rate is proportional to size of current, therefore available Ia electric current characterizes wire feed rate.
Arc voltage is also the key factor affecting resonance.Arc voltage is higher, and the length of electric arc is longer, and the time required for liquid level raises is longer, and the cycle is also longer, and now required Di/Dt is less, and magneto-restrictive power is also less to the effect of page acceleration shock, is conducive to the jumping frequency rate keeping liquid level.
Gage of wire is also the key factor affecting resonance.Unit interval send the amount of metal of welding region to and gage of wire closely related.Welding wire is thicker, and needed for molten drop disengaging welding wire end, magneto-restrictive power is larger, and required Di/Dt is larger.Welding wire sectional area square has substantial connection with diameter.
According to above-mentioned analysis, inventor finds in an experiment, and when electric current is greater than 40A and is less than 300A, cover with the gamut making metal arc welding realize short circuiting transfer, the current changing rate Di/Dt flowing through welding wire meets following rule:
Di/Dt＝K*（D+K 1） ２*Ia/（Va-K 2）（A／mS）；
Wherein:
K is constant, and its span is 1.2-1.5;
D is gage of wire;
K 1for correction value, its span is 0.4-0.7;
The electric current of what Ia was flow through welding wire;
Va is the voltage of welding wire end to workpiece two ends;
K 2for correction value, its span is 12-16.
At welding field, the very difficult derivation of equation of generation of phenomenon, namely utilizes above-mentioned formula to go the generation of derivation resonance to be a very difficult thing.But resonant mode short circuiting transfer reflects by voltage waveform, it is periodically strong.
In welding process, the stem elongation of welding wire is Φ 0.8=8/12, Φ 1.0=10/15, Φ 1.2=12/18.
Choose the welding wire that diameter is 0.8mm:
When electric current I a=100A, voltage Va=19V, under high-speed photography, when not adopting said method, the voltage of its welding wire, current waveform as shown in Figure 3, can be found out that from waveform it exists 1 abnormal short circuit, affect welding effect.Adopt said method, preferably, K=1.33, K 1=0.5, K 2when=14, the voltage of its welding wire, current waveform as shown in Figure 4, can find out from waveform abnormal short circuit disappear and frequency evenly, realize resonant mode short circuiting transfer.
When electric current I a=160A, voltage Va=21V, under high-speed photography, when not adopting said method, the voltage of its welding wire, current waveform as shown in Figure 5, can be found out that from waveform it exists 3 abnormal short circuits, affect welding effect.Adopt said method to improve, and make K=1.3, K 1=0.55, K 2=15, as shown in Figure 6, can find out that from waveform abnormal short circuit disappears, bath surface enters resonant condition for the voltage of its welding wire, current waveform.
When electric current I a=180A, voltage Va=24V, under high-speed photography, when not adopting said method, the voltage of its welding wire, current waveform as shown in Figure 7, can be found out that from waveform it exists 9 abnormal short circuits, affect welding effect.Adopt said method to improve, and make K=1.33, K 1=0.45, K 2=14.5, the voltage of its welding wire, current waveform as shown in Figure 8, can find out that from waveform abnormal short circuit disappears, periodically grow, and bath surface enters resonant condition.
Choose the welding wire that diameter is 1.0mm:
When electric current I a=110A, voltage Va=19V, under high-speed photography, when not adopting said method, the voltage of its welding wire, current waveform are as shown in Figure 9, although can find out the generation not having abnormal short circuit from waveform, it is periodically not strong, and welding effect is affected.Adopt said method to improve, and make K=1.35, K 1=0.55, K 2=14, as shown in Figure 10, can find out its periodically grow from waveform, bath surface enters resonant condition for the voltage of its welding wire, current waveform.
When electric current I a=180A, voltage Va=20V, under high-speed photography, when not adopting said method, as shown in figure 11, can find out that from waveform it exists 5 abnormal short circuits, welding effect is bad for the voltage of its welding wire, current waveform.Adopt said method to improve, and keep K=1.33, K 1=0.5, K 2=13, the voltage of its welding wire, current waveform as shown in figure 12, can find out that from waveform abnormal short circuit disappears, periodically grow, and bath surface enters resonant condition.
When electric current I a=210A, voltage Va=22V, under high-speed photography, when not adopting said method, the voltage of its welding wire, current waveform as shown in figure 13, can be found out that from waveform it exists 10 abnormal short circuits, affect welding effect.Adopt said method to improve, and keep K=1.33, K 1=0.5, K 2=14, the voltage of its welding wire, current waveform as shown in figure 14, can find out that from waveform abnormal short circuit disappears, periodically grow, and bath surface enters resonant condition.

Claims (4)

1. the bath surface control method of resonant mode short circuiting transfer, is characterized in that, when electric current is greater than 40A and is less than 300A, the current changing rate Di/Dt flowing through welding wire is:
Di/Dt＝K*（D+K 1） ２*Ia/（Va-K 2）（A／mS）；
Wherein:
K is constant, and its span is 1.2-1.5;
D is gage of wire;
K 1for correction value, its span is 0.4-0.7;
The electric current of what Ia was flow through welding wire;
Va is the voltage of welding wire end to workpiece two ends;
K 2for correction value, its span is 12-16.
2. the bath surface control method of resonant mode short circuiting transfer according to claim 1, is characterized in that: the value of described K is 1.33.
3. the bath surface control method of resonant mode short circuiting transfer according to claim 1 and 2, is characterized in that: described K 1span be 0.4-0.6.
4. the bath surface control method of resonant mode short circuiting transfer according to claim 1 and 2, is characterized in that: described K 2span be 13-15.
CN201510805830.6A 2015-11-20 2015-11-20 The bath surface control method of resonant mode short circuiting transfer Active CN105364264B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510805830.6A CN105364264B (en) 2015-11-20 2015-11-20 The bath surface control method of resonant mode short circuiting transfer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510805830.6A CN105364264B (en) 2015-11-20 2015-11-20 The bath surface control method of resonant mode short circuiting transfer

Publications (2)

Publication Number Publication Date
CN105364264A true CN105364264A (en) 2016-03-02
CN105364264B CN105364264B (en) 2016-11-30

Family

ID=55367159

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510805830.6A Active CN105364264B (en) 2015-11-20 2015-11-20 The bath surface control method of resonant mode short circuiting transfer

Country Status (1)

Country Link
CN (1) CN105364264B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1190629A (en) * 1997-09-26 1999-04-06 Toyota Motor Corp Pulsed arc welding method
EP1710037A1 (en) * 2005-04-05 2006-10-11 Vermaat Technics B.V. Apparatus and method for short-circuit arc welding
CN101428368A (en) * 2008-12-12 2009-05-13 北京工业大学 Control method for short-circuiting transfer soldering system
CN103111732A (en) * 2013-01-25 2013-05-22 昆山华恒焊接股份有限公司 Control method of short circuiting transient process in consumable electrode gas shielded welding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1190629A (en) * 1997-09-26 1999-04-06 Toyota Motor Corp Pulsed arc welding method
EP1710037A1 (en) * 2005-04-05 2006-10-11 Vermaat Technics B.V. Apparatus and method for short-circuit arc welding
CN101428368A (en) * 2008-12-12 2009-05-13 北京工业大学 Control method for short-circuiting transfer soldering system
CN103111732A (en) * 2013-01-25 2013-05-22 昆山华恒焊接股份有限公司 Control method of short circuiting transient process in consumable electrode gas shielded welding

Also Published As

Publication number Publication date
CN105364264B (en) 2016-11-30

Similar Documents

Publication Publication Date Title
CN101274384B (en) Consumable electrode type gas shielded arc welding control apparatus and welding control method
JP4498263B2 (en) Pulse arc welding method
Yan et al. Droplet transition for plasma-MIG welding on aluminium alloys
CN101870032A (en) Molten drop timed and forced short-circuiting transfer control method in large-current CO2 welding process
CN1942279A (en) Consumable electrode arc-welding machine
JP4877235B2 (en) Welding output control method and arc welding apparatus
CN101885103B (en) Arc welding method
JP2011098375A (en) Method and apparatus for arc welding
JPWO2017125989A1 (en) Pulse arc welding control method and pulse arc welding apparatus
CN105562894B (en) A kind of device using the auxiliary MIG welding of pulse TIG electric arcs and the welding method using device realization
CN108555421A (en) A kind of droplet transfer control device and its control method based on pulse matching electrode TIG
CN103111732A (en) Control method of short circuiting transient process in consumable electrode gas shielded welding
CN204160022U (en) A kind of consumable electrode arc welding control device
CN100584504C (en) Sub-jet transient self-adaption control method for aluminum and aluminum alloy consumable electrode gas-arc welding
CN108883486A (en) arc welding control method
CN110369838A (en) A kind of nickel-base alloy gas metal-arc welding welding waveform controlling method
JPWO2017029783A1 (en) Arc welding control method
CN104209631B (en) A kind of consumable electrode arc welding control device
CN101282813B (en) Method and apparatus for welding
CN105364264B (en) The bath surface control method of resonant mode short circuiting transfer
CN111001902B (en) Welding control circuit and alternating current welding power supply
CN102756197A (en) Welding current control method in short circuit period
WO2017038060A1 (en) Arc welding method and arc welding device
CN102978413A (en) Hundred-ton large-scale three-phase electroslag furnace feeding technique
Ma et al. Efficient manufacturing of Al–Mg alloys using controlled low heat input wire and arc additive manufacturing

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant