Convenient for the gas-shielded welder of the starting the arc
Technical field
The present invention relates to welding technique, in particular to a kind of gas-shielded welder convenient for the starting the arc.
Background technique
Gas-shielded welder (cogas protective welder) does not have to welding rod welding wire, with CO2, CO2 and argon gas gaseous mixture
Body, CO2 and helium mix gas do the parts such as protective gas, including power supply, wire feeding motor, and gas shield welding welding current is exportable
Rectangular pulse waveform, reaches spray transfer, is easy to all-position welding.
There are three types of the striking mode of consumable electrode pulse current gas protection weldering is general: (welding wire contact workpiece is led to for quick-fried disconnected striking
Electricity melts welding wire and workpiece contact position, the quick-fried electric arc that ignites of having no progeny of welding wire);Slow wire feed striking (welding wire be slowly sent to workpiece until
Then arc ignition improves wire feed rate) and pumpback striking (welding wire contact workpiece, pumpback welding wire ignites electric arc after energization).
Existing gas shield welding starting the arc method is to touch the moment of workpiece in welding wire, by gas-shielded welder export one it is fixed
Pulse (peak current level and width and welding wire material and gage of wire of this pulse have relationship), instant melting falls welding wire, then
Into welded condition.When welding the starting the arc, if for a long time with last time weld interval, welding wire is cold conditions at this time;If with upper
Secondary weld interval very short time, welding wire is hot at this time.Cold conditions and it is hot when, with same fixed pulse, welding wire it is molten
Change amount is different, if pulse fusing amount in cold conditions is suitable, fusing will be on the high side when hot, melts close when hot on the contrary
Fitting in cold conditions fusing will be inadequate, can cause the cause different in size of starting the arc moment electric arc in this way, cause weld seam starting the arc welding defect.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of gas-shielded welder convenient for the starting the arc, cold conditions welding wire, hot can be made
The fusing amount of welding wire is the same, avoids the cause different in size of starting the arc moment electric arc, causes weld seam starting the arc welding defect.
In order to solve the above technical problems, the gas-shielded welder provided by the invention convenient for the starting the arc comprising inversion rectification circuit,
Current feedback circuit, machine initial arc switch and controller;
The output welder arc electrodes of the inversion rectification circuit;
The current feedback circuit is used to acquire the electric current of welding machine arc electrode;
The controller is for controlling inversion rectification circuit as the power supply of welding machine arc electrode;
When machine initial arc switch is triggered, controller controls inversion rectification circuit and exports starting the arc pulse to the electric arc electricity
Pole, the pulse current and/or pulse width of the starting the arc pulse are positively correlated with weldering interval t is stopped, and stop weldering to be spaced t to be welding machine arc electricity
The electric current of pole starts to continue to that the machine initial arc switchs the period being triggered for 0.
Preferably, the pulse current of the starting the arc pulse is positively correlated with weldering interval t is stopped, pulse width is constant.
Preferably, the pulse width of the starting the arc pulse is positively correlated with weldering interval t is stopped, pulse current is constant.
Preferably, the same weldering interval t that stops of the pulse current of the starting the arc pulse and pulse width is positively correlated.
Preferably, M=t0*i0;
Work as tR≤ t, M=MR;
As t < tR, M=MS;
MS< MR;
i0For pulse current, t0For pulse width, tRTo originate cold welding thresholding duration, M is pulse area, MSFor calibration pulse face
Product, MRPulse area is set for starting cold welding.
Preferably, M=t0*i0;
Work as tn≤ t < tn+1, M=Mn;
Work as tK+1≤ t, M=MK+1;
As t < tR, M=MS;
tR< tn< tn+1, MS< Mn< Mn+1;
K is positive integer, and n is the positive integer less than or equal to K, i0For pulse current, t0For pulse width, tRTo originate cold welding thresholding
Duration, tnFor the n-th setting duration, M is pulse area, MSFor calibration pulse area, MnFor the n-th setting pulse area, Mn+1It is n-th
+ 1 setting pulse area.
Preferably, K is 1 or 2.
Preferably, M=t0*i0 ;
As t < tR, M=MS;
Work as tR≤ t < tL, M=ML;
Work as tH≤ t, M=MH;
Work as tL≤ t < tH, M=MH(d*(MH-ML)/(tH-tL));
tR< tL< tH, MS< ML< MH;
i0For pulse current, t0For pulse width, tRTo originate cold welding thresholding duration, tLFor cold welding low threshold duration, tHFor cold welding
Wealthy family's limit, M are pulse area, MSFor calibration pulse area, MLPulse area, M are set for low cold weldingHFor the setting of high cold welding
Pulse area, d are coefficient.
Preferably, the pulse current and/or pulse width of the starting the arc pulse are with weldering interval t is stopped, exponentially type is positively correlated.
Preferably, the pulse current i of starting the arc pulse0Greater than 180A and it is less than 300A, pulse width t0Greater than 400us and small
In 600us.
Gas-shielded welder convenient for the starting the arc of the invention, the starting the arc are that this welding starting the arc starts to protect with gas according to gas-shielded welder
What the welding of welding machine last time terminated stops weldering interval t, the pulse current of the starting the arc pulse of this welding of adjustment gas-shielded welder and/or pulse
Width makes the pulse current of the starting the arc pulse of this welding of gas-shielded welder and/or pulse width stop welding interval t positive with described
It closes, pulse when welding the starting the arc keeps the fusing amount of cold conditions welding wire, hot welding wire the same according to weldering interval t length adjust automatically is stopped,
The cause different in size of starting the arc moment electric arc is avoided, weld seam starting the arc welding defect is caused.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, the required attached drawing of the present invention is made below simple
It introduces, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ordinary skill people
For member, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is one example structure schematic diagram of gas-shielded welder convenient for the starting the arc of present patent application.
Specific embodiment
Below in conjunction with attached drawing, clear, complete description is carried out to the technical solution in the present invention, it is clear that described
Embodiment is a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff all other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
Embodiment one
As shown in Figure 1, convenient for the starting the arc gas-shielded welder include inversion rectification circuit, current feedback circuit, machine initial arc switch and
Controller;
The output welder arc electrodes of the inversion rectification circuit;
The current feedback circuit is used to acquire the electric current of welding machine arc electrode;
The controller is for controlling inversion rectification circuit as the power supply of welding machine arc electrode;
When machine initial arc switch is triggered, controller controls inversion rectification circuit and exports starting the arc pulse to the electric arc electricity
Pole, the pulse current and/or pulse width of the starting the arc pulse are positively correlated with weldering interval t is stopped, and stop weldering to be spaced t to be welding machine arc electricity
The electric current of pole starts to continue to that the machine initial arc switchs the period being triggered for 0.
Preferably, the pulse current of the starting the arc pulse is positively correlated with weldering interval t is stopped, pulse width is constant.
Preferably, the pulse width of the starting the arc pulse is positively correlated with weldering interval t is stopped, pulse current is constant.
Preferably, the same weldering interval t that stops of the pulse current of the starting the arc pulse and pulse width is positively correlated.
The gas-shielded welder convenient for the starting the arc of embodiment one, the starting the arc are that this welding starting the arc starts and gas according to gas-shielded welder
The weldering that stops that protecting the welding of welding machine last time terminates is spaced t, the pulse current and/or arteries and veins of the starting the arc pulse of this welding of adjustment gas-shielded welder
Width is rushed, the pulse current of the starting the arc pulse of this welding of gas-shielded welder and/or pulse width is made to stop welding interval t positive with described
It closes, pulse when welding the starting the arc keeps the fusing amount of cold conditions welding wire, hot welding wire the same according to weldering interval t length adjust automatically is stopped,
The cause different in size of starting the arc moment electric arc is avoided, weld seam starting the arc welding defect is caused.
Embodiment two
The gas-shielded welder convenient for the starting the arc based on embodiment one, M=t0*i0;
Work as tR≤ t, M=MR;
As t < tR, M=MS;
MS< MR;
i0For pulse current, t0For pulse width, tRTo originate cold welding thresholding duration, M is pulse area, MSFor calibration pulse face
Product, MRPulse area is set for starting cold welding.
The gas-shielded welder convenient for the starting the arc of embodiment two adjusts starting the arc pulse using single-order ladder type, reaches when stopping weldering interval t
Cold welding thresholding duration tR, by increasing the pulse current and/or pulse width of starting the arc pulse, make the pulse area of starting the arc pulse
It is increased to cold welding setting pulse area MR。
Embodiment three
Based on the gas-shielded welder of embodiment one, M=t0*i0;
Work as tn≤ t < tn+1, M=Mn;
Work as tK+1≤ t, M=MK+1;
As t < tR, M=MS;
tR< tn< tn+1, MS< Mn< Mn+1;
K is positive integer, and n is the positive integer less than or equal to K, i0For pulse current, t0For pulse width, tRTo originate cold welding thresholding
Duration, tnFor the n-th setting duration, M is pulse area, MSFor calibration pulse area, MnFor the n-th setting pulse area, Mn+1It is n-th
+ 1 setting pulse area.
Preferably, K is 1 or 2.
The gas-shielded welder convenient for the starting the arc of embodiment three adjusts starting the arc pulse using multistage ladder type, stops weldering interval t and reaches not
Same setting duration tn, by adjusting the pulse current and/or pulse width of starting the arc pulse, make the pulse area of starting the arc pulse
It is increased to corresponding setting pulse area Mn。
Example IV
Based on the gas-shielded welder of embodiment one, M=t0*i0 ;
As t < tR, M=MS;
Work as tR≤ t < tL, M=ML;
Work as tH≤ t, M=MH;
Work as tL≤ t < tH, M=MH(d*(MH-ML)/(tH-tL));
tR< tL< tH, MS< ML< MH;
i0For pulse current, t0For pulse width, tRTo originate cold welding thresholding duration, tLFor cold welding low threshold duration, tHFor cold welding
Wealthy family's limit, M are pulse area, MSFor calibration pulse area, MLPulse area, M are set for low cold weldingHFor the setting of high cold welding
Pulse area, d are coefficient (can be set according to different welding wire materials and gage of wire).
The gas-shielded welder convenient for the starting the arc of example IV adjusts starting the arc pulse using the linear formula of ladder.
Embodiment five
The gas-shielded welder convenient for the starting the arc based on embodiment one, the pulse current of the starting the arc pulse and/or pulse width with stop
Exponentially type is positively correlated weldering interval t;
Preferably, the pulse current i of starting the arc pulse0Greater than 180A and it is less than 800A, pulse width t0Greater than 0.4ms and it is less than
100ms。
The above is only preferred embodiment of the present application, it is not used to limit the application.Come for those skilled in the art
It says, various changes and changes are possible in this application.Within the spirit and principles of this application, made any modification, equivalent
Replacement, improvement etc., should be included within the scope of protection of this application.