CN105728898B - Pulse welding equipment and its control method - Google Patents
Pulse welding equipment and its control method Download PDFInfo
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- CN105728898B CN105728898B CN201610187878.XA CN201610187878A CN105728898B CN 105728898 B CN105728898 B CN 105728898B CN 201610187878 A CN201610187878 A CN 201610187878A CN 105728898 B CN105728898 B CN 105728898B
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- background current
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- feed rate
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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
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
- B23K9/091—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits
- B23K9/092—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits characterised by the shape of the pulses produced
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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
- B23K9/095—Monitoring or automatic control of welding parameters
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- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
The present invention provides a kind of pulse welding equipment, and it includes：Preset current acquiring unit, the first wire feed rate computing unit, the first background current computing unit, the second background current computing unit and control unit.Described control unit is within the first scheduled period from arc welding gun switch connection, control is exported based on first background current, and within the second scheduled period for terminating to play since the first scheduled period main weldering was connect the stage, control causes background current from the first background current gradual change to second background current.It can effectively improve welding quality.
Description
[technical field]
The present invention relates to welding field, more particularly to a kind of welding equipment that is welded of use pulse welding mode and its
Control method.
[background technology]
Welding equipment (also referred to as welding machine) is widely used to all kinds of manufacturing industry.Welding equipment is different according to its welding manner,
Two kinds of short circuiting transfer and pulse welding can be divided into.Pulse welding has an electric arc pinch effect, and electric arc is concentrated, and it is excellent that deflection is good etc.
Point, thus be widely used in plate sheet welding (such as welding of stainless steel, steel and titanium non-ferrous metal).Hereinafter, pulse will be used
The welding equipment that mode is welded is referred to as pulse welding equipment.
At present, mainly there is the following two kinds welding method when carrying out plate sheet welding using pulse welding equipment：(1) small electricity is used
Fluid welding connects (for example, preset current is below 100A), and wire feed rate is relatively slow.(2) using high current welding (for example, preset
Electric current is more than 100A), wire feed rate is relatively fast.However, due to using during high current welding, even if accelerating wire feed rate,
Also often by thin plate burn-through, therefore, most producers are preferred to use small current welding.
When being welded using pulse welding equipment to thin plate, existing striking stage control is as follows：Such as Fig. 6 institutes
Show, after arc welding gun switch connection, in whole striking stage T2, with the wire feed rate increase of wire-feed motor, control causes base value electricity
Stream I is slowly increased.When wire feed rate reaches the setting speed that main weldering connects, the striking stage terminates, into main weldering connect the stage (T2 it
Afterwards).The stage is connect in main weldering, background current I keeps constant, and wire feed rate keeps constant.
Fig. 7 is the output voltage wave monitored when preset welding current is low current by oscillograph.As shown in fig. 7,
Have that base value voltage is unstable a striking stage, the phenomenon of even more than crest voltage can be gradually risen.In the case, if base
Threshold voltage is continued for some time more than crest voltage, then can produce current interruption, has had a strong impact on striking performance.In addition, along with base
Threshold voltage is too high to produce ear-piercing sound, welder can be made to do not feel like oneself.
In addition, market is it is also expected to the striking stage control for welding thin plate to existing use high current is optimized.
[content of the invention]
[technical problem]
It is contemplated that for existing pulse welding equipment when using small current welding thin plate the striking stage exist it is disconnected
The problems such as arc, high noise, there is provided a kind of pulse welding equipment and its control method.
[solution]
The present invention provides a kind of pulse welding equipment, and it includes：Preset current acquiring unit, it is used to obtain user's input
Preset current；First wire feed rate computing unit, it is used to connect the of the stage according to the predetermined preset current and main weldering
The corresponding relation of one wire feed rate, and the preset current, to calculate first wire feed rate；First background current is calculated
Unit, it is used for the first corresponding relation according to first wire feed rate and the first background current, and first wire feed
Speed, to calculate first background current；Second background current computing unit, for according to predetermined first wire feed speed
Second corresponding relation of degree and the second background current, and first wire feed rate, to calculate second background current, institute
State the background current that the second background current connects the stage for the main weldering；And control unit, in the from arc welding gun switch connection
In one scheduled period, control is exported based on first background current, and terminates to play main weldering from the first scheduled period
In the second scheduled period that the stage of connecing has started, control causes background current from the first background current gradual change to described second
Background current.
The present invention also provides a kind of control method of pulse welding equipment, and it comprises the following steps：Obtain user's input
Preset current；The corresponding relation of first wire feed rate in stage is connect according to the predetermined preset current and main weldering, and it is described
Preset current, to calculate first wire feed rate；It is corresponding according to the first of first wire feed rate and the first background current
Relation, and first wire feed rate, to calculate first background current；According to predetermined first wire feed rate with
Second corresponding relation of the second background current, and first wire feed rate, to calculate second background current, described
Two background currents are the background current that the main weldering connects the stage；And within the first scheduled period from arc welding gun switch connection,
Control is exported based on first background current, and is terminated to play main weldering connect the stage since the first scheduled period
In second scheduled period, control causes background current from the first background current gradual change to second background current.
[invention beneficial effect]
The present invention by above-mentioned technical proposal, can effectively overcome existing pulse welding equipment by during small current welding
Easy current interruption and the ear-piercing defect of noise that the striking stage is present, so as to improve striking performance and welding comfort level, additionally
The control in striking stage when can be to being welded using high current provides further optimization.
[brief description of the drawings]
Fig. 1 is the software architecture diagram of the pulse welding equipment of first embodiment of the invention.
Fig. 2 is the control flow chart in the pulse welding equipment striking stage of first embodiment of the invention.
Fig. 3 be first embodiment of the invention pulse welding equipment in the corresponding relation figure that changes over time of background current.
Fig. 4 is the oscillogram of the output voltage in the pulse welding equipment striking stage of first embodiment of the invention.
Fig. 5 be second embodiment of the invention pulse welding equipment in the corresponding relation figure that changes over time of background current.
Fig. 6 is the corresponding relation figure that background current is changed over time in existing pulse welding equipment.
Fig. 7 is the oscillogram of the output voltage in existing pulse welding equipment striking stage.
[embodiment]
The embodiment to the present invention is illustrated below in conjunction with the accompanying drawings.
First, the basic welding process to the pulse welding equipment of the present invention is described.In welding, weldering is connected first
Equipment (including the source of welding current and wire feeder) is connect, user inputs various welding parameters, such as material, silk by guidance panel
Footpath, preset current etc..Afterwards, user presses arc welding gun switch, and now welding equipment enters the striking stage, meanwhile, welding equipment control
Wire feeder processed starts wire feed.When wire feed rate reaches predetermined value, welding equipment control connects the stage into main weldering.Connect in main weldering
Base value in stage, the output current wave of pulse welding equipment keeps constant.Afterwards, when user presses arc welding gun switch again,
Welding equipment control, which enters, flashes back the stage.In the stage of flashing back, wire feed rate is gradually reduced, while the welding current of output is also gradually
Reduction is until for 0, now welding terminates.
User presses the process that arc welding gun switch is welded repeatedly, exactly repeats the process in each above-mentioned stage.The present invention
It is the improvement of the control method to the pulse welding equipment striking stage.The control method can be by the controller of welding equipment
Corresponding program is performed to realize.
Further, since the present invention is the improvement to pulse welding device interior control program (software), therefore omit herein
The description constituted to the hardware of the pulse power.
[first embodiment]
The first embodiment of the present invention is described referring to Fig. 1 to Fig. 4.In the first embodiment, to pulse welding equipment
It is described using control during small current welding.In the present embodiment, the preset current no more than 100A is defined as small electricity
Stream.Fig. 1 shows the software configuration of the pulse welding equipment of first embodiment.
As shown in figure 1, the pulse welding equipment of the present invention includes：Preset current acquiring unit, it is used to obtaining user defeated
The preset current entered；First wire feed rate computing unit, it is used to connect the stage according to the predetermined preset current and main weldering
The corresponding relation of first wire feed rate, and the preset current, to calculate first wire feed rate；First background current meter
Unit is calculated, it is used for the first corresponding relation according to predetermined first wire feed rate and the first background current, and described
First wire feed rate, to calculate first background current.
The pulse welding equipment of the present invention also includes：Second background current computing unit, for according to predetermined described
One wire feed rate and the second corresponding relation of the second background current, and first wire feed rate, to calculate second base
It is worth electric current, second background current is the background current that the main weldering connects the stage；And control unit, connect from arc welding gun switch
In the first scheduled period led to, control is exported based on first background current, and is terminated from the first scheduled period
Main weldering is played to connect in the second scheduled period that the stage started, control cause background current from the first background current gradual change to
Second background current.
In the first embodiment, it is assumed that user input preset current be 80A, but the invention is not restricted to this, Ke Yiwei
70A or 60A.The size of preset current can be determined according to the gauge of sheet of required welding and the welding conditions of reality.
Next, reference picture 2 describes the control method in the pulse welding equipment striking stage of first embodiment of the invention.Institute
Control method is stated as the corresponding software program of modules shown in the controller (CPU) of pulse welding equipment is performed with Fig. 1
To realize.
As shown in Fig. 2 first, in step s 201, CPU obtains the preset current of user's input.Specifically, CPU is read
Take the preset current value that family is inputted by the operating unit (for example, guidance panel) of welding equipment.
Then, in step S202, CPU connects first wire feed rate in stage according to the predetermined preset current and main weldering
Corresponding relation, and the preset current, to calculate first wire feed rate.The preset current connects the stage with main weldering
The corresponding relation of first wire feed rate can be stored in advance in the internal storage of pulse welding equipment as table.In addition, this
Invention not limited to this, the table can also be stored in external memory storage.
Then, in step S203, CPU is according to predetermined first wire feed rate and the first couple of the first background current
It should be related to, and first wire feed rate, to calculate first background current.It is corresponding with used in step S202 to close
It is similar, in the present embodiment, first corresponding relation also serves as the storage inside that table is stored in advance in pulse welding equipment
In device.In addition, the first corresponding relation can be obtained by testing repeatedly, i.e., for each in multiple wires feed rate, make
The test in striking stage is carried out with the first different background currents, optimal value is determined, and is stored as table, or fits phase
The homologous thread answered.
In step S204, CPU is according to second corresponding pass of predetermined first wire feed rate with the second background current
System, and first wire feed rate, to calculate second background current, second background current is that the main weldering connects rank
The background current of section.It is similar with the corresponding relation used in step S202, in the present embodiment, second corresponding relation
In the internal storage that pulse welding equipment is stored in advance in as table.
Then, in step S205, CPU is within the first scheduled period from arc welding gun switch connection, and control is based on described
First background current is exported, and is terminating to play the second scheduled period main weldering was connect the stage since the first scheduled period
Interior, control causes background current from the first background current gradual change (linear change) to second background current.
Specifically, CPU calculates the angle of flow of device for power switching (IGBT) according to the first background current, and first
Corresponding drive signal is exported to IGBT in scheduled period, so as to realize the output of the first scheduled period electric current.And it is pre- second
In periodically, background currents of the CPU according to corresponding to each moment calculates the IGBT angle of flow, and export corresponding driving letter
Number, so as to realize the output of the second scheduled period electric current.
It is for convenience, unrelated with the preset current that user inputs it should be noted that in the present embodiment, and by first
Scheduled period is set as fixed value.But the invention is not restricted to this, user can be according to the flexibly setting first of actual welding situation
Scheduled period, if the first scheduled period be less than the striking stage it is whole during, that is, require to reserve the in the striking stage
Two scheduled periods.
It should be noted that the step S201 in Fig. 2 is to S204, it can enter in the case where pulse welding equipment is in holding state
OK, i.e., carried out in a period of being inputted from user before preset current is connected to arc welding gun switch.Certainly, the invention is not restricted to this,
Above-mentioned steps can be carried out after arc welding gun switch connection.
Fig. 3 shows the corresponding relation figure that background current is changed over time in first embodiment.In figure 3, T2 is striking
The complete period in stage.T1 represented for the first scheduled period, and T2-T1 represented for the second scheduled period.After T2, carry out main weldering and connect rank
Section.As shown in figure 3, the value I1 (the first background current) of the background current of the first scheduled period connects the base value electricity in stage higher than main weldering
The value I2 (the second background current) of stream.Within the second scheduled period, background current is (linear to drop from the first background current I1 gradual changes
It is low) to the second background current I2.
Fig. 4 shows the oscillogram of the output voltage in the pulse welding equipment striking stage of first embodiment.Such as Fig. 4 institutes
Show, by the control method of first embodiment, it is unstable to eliminate base value voltage present in prior art, can gradually rise
The even more than phenomenon of crest voltage, so as to effectively improve welding quality.
[second embodiment]
The second embodiment of the present invention is described referring to Fig. 5.Second embodiment is using big electricity to pulse welding equipment
Control when fluid welding connects is described.In the present embodiment, the preset current more than 100A is defined as high current.
Because the software sharing and control method of second embodiment are identical with first embodiment, just it is not repeated to retouch herein
State.
The difference of second embodiment and first embodiment is the of different sizes of the first background current.As shown in figure 5,
In a second embodiment, the value I3 (the first background current) of the first scheduled period T1 background current connects the base in stage less than main weldering
It is worth the value I4 (the second background current) of electric current.Within the second scheduled period (T2-T1), background current from the first background current I3 gradually
Become (linear rise) to the second background current I4.
More than, with reference to detailed or specific embodiment, the present invention is described, but those skilled in the art manage
Solution, can carry out various changes and amendment on the premise of the thought and scope of the present invention is not departed from.
[industrial applicibility]
Present invention can apply in existing pulse welding equipment, can effectively improve welding quality.
Claims (6)
1. a kind of pulse welding equipment, it includes：
Preset current acquiring unit, it is used for the preset current for obtaining user's input；
First wire feed rate computing unit, it is used for the first wire feed speed that the stage is connect according to the predetermined preset current and main weldering
The corresponding relation of degree, and the preset current, to calculate first wire feed rate；
First background current computing unit, it is used for the first corresponding pass with the first background current according to first wire feed rate
System, and first wire feed rate, to calculate first background current；
Second background current computing unit, for the second couple according to predetermined first wire feed rate and the second background current
It should be related to, and first wire feed rate, to calculate second background current, second background current is the main weldering
Connect the background current in stage；And
Control unit, within the first scheduled period from arc welding gun switch connection, control is carried out based on first background current
Output, and terminate to play in the second scheduled period the main weldering was connect the stage since the first scheduled period, control causes
Background current is from the first background current gradual change to second background current.
2. pulse welding equipment according to claim 1, it is characterised in that the preset current is no more than 100A, and
First background current is higher than second background current.
3. pulse welding equipment according to claim 1, it is characterised in that the preset current is more than 100A, and institute
The first background current is stated less than second background current.
4. a kind of control method of pulse welding equipment, it comprises the following steps：
Obtain the preset current of user's input；
The corresponding relation of first wire feed rate in stage, and the preset electricity are connect according to the predetermined preset current and main weldering
Stream, to calculate first wire feed rate；
According to first wire feed rate and the first corresponding relation of the first background current, and first wire feed rate, come
Calculate first background current；
According to predetermined first wire feed rate and the second corresponding relation of the second background current, and first wire feed speed
Degree, to calculate second background current, second background current is the background current that the main weldering connects the stage；And
Within the first scheduled period from arc welding gun switch connection, control is exported based on first background current, and
Terminate to play in the second scheduled period the main weldering was connect the stage since the first scheduled period, control cause background current from
The first background current gradual change is to second background current.
5. the control method of pulse welding equipment according to claim 4, it is characterised in that the preset current is no more than
100A, and first background current is higher than second background current.
6. the control method of pulse welding equipment according to claim 4, it is characterised in that the preset current exceedes
100A, and first background current is less than second background current.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610187878.XA CN105728898B (en) | 2016-03-29 | 2016-03-29 | Pulse welding equipment and its control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610187878.XA CN105728898B (en) | 2016-03-29 | 2016-03-29 | Pulse welding equipment and its control method |
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| CN105728898B true CN105728898B (en) | 2017-09-29 |
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| CN108127220B (en) * | 2017-12-20 | 2019-09-17 | 唐山松下产业机器有限公司 | The striking method of pulsed gas metal arc welding |
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| JP3941802B2 (en) * | 2004-07-08 | 2007-07-04 | 松下電器産業株式会社 | Arc welding control method and arc welding apparatus |
| JP5558881B2 (en) * | 2010-03-29 | 2014-07-23 | 株式会社ダイヘン | Plasma MIG welding method |
| DE102010003530A1 (en) * | 2010-03-31 | 2011-10-06 | Robert Bosch Gmbh | Hardware data processing unit and method for monitoring a rounding duration of a routing unit |
| CN102873433B (en) * | 2012-07-03 | 2014-11-26 | 广东技术师范学院 | Method for predicting and setting wire feed speed of double-wire arc welding |
| US10906114B2 (en) * | 2012-12-21 | 2021-02-02 | Illinois Tool Works Inc. | System for arc welding with enhanced metal deposition |
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