Fast frequency arc additive power supply and wire feeding drive integrated control circuit and control method

Abstract

The application provides a fast-frequency arc additive power supply and a wire feeding drive integrated control circuit and a control method; wherein the control circuit comprises a fast-frequency pulse current main circuit, a base value current main circuit, a control circuit and a wire feeding drive circuit; the control circuit is connected with the fast-frequency pulse current main circuit and the base value current main circuit respectively; the control circuit is further connected with an external wire feeding motor through the wire feeding drive circuit to control the wire feeding speed; the peak value and the base value of the wire feeding speed are synchronized with the fast-frequency pulse waveform main current and the secondary current output by the fast-frequency pulse current main circuit. The control circuit integrates the fast-frequency welding power supply and the wire feeding motor drive, synchronously controls the fast-frequency welding power supply current parameters and the wire feeding speed, so that the welding wire can adopt the matching wire feeding speed in different current output stages of the fast-frequency welding power supply, and then the welding wire is fully melted, the additive forming is ensured, the welding porosity is reduced, and the additive quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric arc additive technology, and more particularly to a fast-frequency electric arc additive power supply and wire feeding drive integrated control circuit and control method. BACKGROUND

[0002] In recent years, electric arc additive technology has become a research focus in the field of additive manufacturing. Traditional TIG electric arc additive technology has a large heat input and an uncollected electric arc, which leads to grain coarsening and reduced mechanical properties of the additive part. Fast-frequency pulse TIG technology makes the electric arc shrink, improves the electric arc energy density and increases the electric arc stiffness, which increases the molten pool stirring effect, refines the weld grain and improves the weld mechanical properties. Electric arc additive technology is developing towards integration and high-precision control.

[0003] The existing fast-frequency pulse TIG electric arc additive system mainly includes an upper computer, a motion controller, a robot, a fast-frequency pulse TIG power supply, a wire feeder, a shielding gas device, a welding torch, and a workpiece clamp. Among them, the wire feeder and the fast-frequency pulse TIG power supply are separately arranged and controlled by different controllers. When the fast-frequency pulse TIG power supply outputs a current welding waveform for pulse current welding, the wire feeding drive waveform is not synchronized. For example, when the fast-frequency pulse TIG power supply outputs a base value stage of the current welding waveform, the welding current is small and the heat input is small, so if a faster wire feeding speed is used at this stage, the welding wire cannot be fully melted, which affects the forming quality of the additive part, and many pores may be generated at the additive part, or even the additive part cannot be formed. Therefore, if the wire feeding speed can be synchronized with the fast-frequency pulse TIG power supply, a slower wire feeding speed can be used when the fast-frequency pulse TIG power supply outputs a smaller welding current, and a faster wire feeding speed can be used when the fast-frequency pulse TIG power supply outputs a larger welding current, which is an ideal solution. However, the existing fast-frequency pulse TIG electric arc additive system does not synchronize the wire feeding speed with the fast-frequency pulse TIG power supply in the control. SUMMARY

[0004] To overcome the shortcomings and deficiencies in the prior art, the purpose of the present application is to provide a fast-frequency electric arc additive power supply and wire feeding drive integrated control circuit and control method. The control circuit integrates the fast-frequency welding power supply and the wire motor drive, synchronously controls the fast-frequency additive power supply current parameters and the wire feeding speed, so that the welding wire can use a matching wire feeding speed at different current output stages of the fast-frequency power supply, and then the welding wire can be fully melted, the additive forming can be ensured, the welding pores can be reduced, and the additive quality can be improved.

[0005] To achieve the above purpose, the present application realizes the technical scheme as follows: a fast-frequency electric arc additive power supply and wire feeding drive integrated control circuit, comprising a fast-frequency pulse current main circuit, a base value current main circuit, a control circuit and a wire feeding drive circuit.

[0006] The control circuit is connected with the fast frequency pulse current main circuit and the base value current main circuit through the welding power supply driving circuit respectively, so as to control the fast frequency pulse current main circuit to output the fast frequency pulse waveform and control the base value current main circuit to output the base value waveform, and the fast frequency pulse waveform and the base value waveform are superimposed to provide the fast frequency double pulse current welding waveform for the welding load together;

[0007] The control circuit is also connected with the external wire feeding motor through the wire feeding driving circuit, and the wire feeding speed is controlled by controlling the pulse width of the pulse driving signal output by the wire feeding driving circuit; the wire feeding speed peak value V p and the base value V b synchronize with the fast frequency pulse waveform main current I p and the secondary current I b , so that the wire feeding speed matches the stirring effect of the fast frequency double pulse current welding waveform on the molten pool.

[0008] Preferably, the wire feeding driving circuit comprises a driving chip of model IR2110, a bootstrap circuit and a motor half-bridge driving circuit.

[0009] Preferably, the pins HIN and LIN of the driving chip respectively receive two complementary PWM signals PWMH and PWML with dead zones output by the control circuit; the pin HO of the driving chip is connected with the upper arm control input end of the motor half-bridge driving circuit;

[0010] The pin LO of the driving chip is connected with the lower arm control input end of the motor half-bridge driving circuit; the pin VS of the driving chip is connected with the bootstrap circuit and the connection position of the upper arm and the lower arm; the connection position of the upper arm and the lower arm is connected with one end of the wire feeding motor; the other end of the wire feeding motor is grounded.

[0011] Preferably, the bootstrap circuit comprises a capacitor C202, a capacitor C203 and a diode D201; the motor half-bridge driving circuit comprises an N-channel field effect transistor Q201 and an N-channel field effect transistor Q202; the field effect transistor Q201 is located at the upper arm, and the field effect transistor Q202 is located at the lower arm; the D pole of the field effect transistor Q201 is connected with the driving power supply, the S pole of the field effect transistor Q201 is connected with the D pole of the field effect transistor Q202, and the S pole of the field effect transistor Q202 is grounded;

[0012] The pin HO of the driving chip is connected with the G pole of the field effect tube Q201 through the parallel diode D202 and the resistor R201; the G pole of the field effect tube Q201 is also connected with the S pole of the field effect tube Q201 through the resistor R202; the pin LO of the driving chip is connected with the G pole of the field effect tube Q202 through the parallel diode D203 and the resistor R203; the G pole of the field effect tube Q202 is also connected with the S pole of the field effect tube Q202 through the resistor R204; the S pole of the field effect tube Q201 is connected with the D pole of the field effect tube Q202, and the pin VS of the driving chip is connected with the connection position.

[0013] Preferably, the fast-frequency pulse current main circuit and the base value current main circuit each comprise a SiC MOSFET full-bridge inverter circuit, a high-frequency transformer and a full-wave rectifier circuit connected in sequence; the fast-frequency pulse current main circuit further comprises a high-frequency current switching circuit connected at the rear side of the full-wave rectifier circuit; wherein the SiC MOSFET full-bridge inverter circuit is connected with an external power supply through a rectifier filter circuit; the high-frequency current switching circuit of the fast-frequency pulse current main circuit is connected in parallel with the full-wave rectifier circuit of the base value current main circuit, and then connected with a welding load;

[0014] The control circuit is connected with the SiC MOSFET full-bridge inverter circuit of the fast-frequency pulse current main circuit and the base value current main circuit through a SiC driving circuit, respectively; the control circuit is connected with the high-frequency current switching circuit of the fast-frequency pulse current main circuit through an IGBT driving circuit.

[0015] Preferably, during the fast-frequency double-pulse current welding waveform output process, the control circuit controls the fast-frequency pulse waveform peak value through the SiC driving circuit, and controls the high-frequency current switching circuit to form a high-frequency complementary PWM pulse through the IGBT driving circuit, so as to generate a fast-frequency pulse waveform.

[0016] Preferably, the control circuit comprises an ARM microprocessor.

[0017] The control method of the above-mentioned fast-frequency arc additive power supply and wire feeding drive integrated control circuit is as follows:

[0018] When the fast-frequency pulse waveform enters the main current I p , the ARM microprocessor timer is timed; the ARM microprocessor controls the fast-frequency pulse waveform peak value output by the fast-frequency pulse current main circuit to be the main current I p , controls the base value waveform output by the base value current main circuit, and controls the pulse driving signal output by the wire feeding drive circuit, the pulse width of the pulse driving signal being the corresponding pulse width of the wire feeding speed peak value V p , so that the wire feeding speed reaches the peak value V p, until the ARM microprocessor timer timing completes the set primary current I p time;

[0019] Then the fast frequency pulse waveform enters the secondary current I b stage, the ARM microprocessor timer timing; the ARM microprocessor controls the fast frequency pulse current main circuit output fast frequency pulse waveform peak value is secondary current I b , control the base value current main circuit output base value waveform, and control the wire feeding driving circuit output pulse driving signal, the pulse driving signal pulse width is the corresponding pulse width of wire feeding speed base value V b , so that the wire feeding speed reaches the base value V b , until the ARM microprocessor timer timing completes the set secondary current I b time;

[0020] Repeat entering the primary current I p stage and secondary current I b stage, until the welding stops.

[0021] Primary current I p Secondary current I b ; the peak value of wire feeding speed V p The base value of wire feeding speed V b .

[0022] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0023] 1、The present application synchronously controls the fast frequency welding power supply current parameter and the wire feeding speed, realizes that the wire feeding speed changes with the fast frequency welding power supply current amplitude, so that the wire can adopt the matching wire feeding speed in different current output stages of the fast frequency welding power supply, and then the wire is fully melted, the additive forming is ensured, the welding porosity is reduced, and the additive quality is improved.

[0024] 2、The present application integrates the fast frequency welding power supply and the wire feeding motor drive, reduces the welding equipment cost, reduces the interference of the interaction process of the fast frequency welding power supply and the wire feeding machine, and improves the precision of the synchronous control of the fast frequency welding power supply and the wire feeding motor. DETAILED DESCRIPTION

[0025] Figure 1 The present application is the system block diagram of the fast frequency arc additive power supply and the wire feeding drive integrated control circuit;

[0026] Figure 2 The present application is the circuit principle diagram of the fast frequency arc additive power supply and the wire feeding drive integrated control circuit, the fast frequency pulse current main circuit and the base value current main circuit;

[0027] Figure 3It is the integrated control circuit of the fast frequency arc additive power supply and the wire feeding drive of the application, and the schematic diagram of the superposition of the fast frequency pulse current main circuit and the base value current main circuit output;

[0028] Figure 4 It is the circuit principle diagram of the wire feeding drive circuit of the integrated control circuit of the fast frequency arc additive power supply and the wire feeding drive of the application;

[0029] Figure 5 It is the control flow chart of the integrated control circuit of the fast frequency arc additive power supply and the wire feeding drive of the application;

[0030] Figure 6 It is the schematic diagram of the fast frequency double pulse current welding waveform and the wire feeding speed waveform of the integrated control circuit of the fast frequency arc additive power supply and the wire feeding drive of the application;

[0031] Fig. 7(a) and Fig. 7(b) are respectively the cross-sectional grain effect diagram of the conventional fast frequency pulse TIG additive part and the fast frequency pulse TIG arc additive part of the application. DETAILED DESCRIPTION

[0032] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0033] EMBODIMENT

[0034] The fast frequency arc additive power supply and the wire feeding drive integrated control circuit of the embodiment, as shown in the figure, comprises a fast frequency pulse current main circuit, a base value current main circuit, a control circuit and a wire feeding drive circuit. Figure 1

[0035] The control circuit is connected with the fast frequency pulse current main circuit and the base value current main circuit through the welding power supply drive circuit respectively.

[0036] The control circuit preferably adopts a 32-bit high-speed ARM microprocessor, and the full digital PWM control signal generated by the control circuit acts on the wire feeding drive circuit, the SiC drive circuit and the IGBT drive circuit respectively. The GPIO interface of the ARM chip controls the parallel connection of the fast frequency pulse current main circuit and the base value current main circuit, and the protection gas control through the isolation mode. The TIM timer is used for welding current waveform control and welding operation process control. The control circuit is also connected with the electric signal sampling feedback module. The current sampling, voltage sampling circuit and wire feeding speed acquisition signal are input to the control circuit after magnetic isolation and signal conditioning, and the output value and the preset value are compared by the control circuit, the PWM duty cycle of the output is changed, and the closed loop control of the power output current, voltage and wire feeding speed is completed.

[0037] As shown in the figure, Figure 2 ​As shown, the fast frequency pulse current main circuit and the base value current main circuit each include a SiC MOSFET full-bridge inverter circuit, a high-frequency transformer and a full-wave rectifier circuit connected in sequence; the fast frequency pulse current main circuit further includes a high-frequency current switching circuit connected at the rear side of the full-wave rectifier circuit; wherein the SiC MOSFET full-bridge inverter circuit is connected with an external power supply through a rectifier filter circuit; the high-frequency current switching circuit of the fast frequency pulse current main circuit is connected in parallel with the full-wave rectifier circuit of the base value current main circuit, and then connected with a welding load.

[0038] The ARM microprocessor is connected with the SiC MOSFET full-bridge inverter circuits of the fast frequency pulse current main circuit and the base value current main circuit through SiC driving circuits respectively; the ARM microprocessor is connected with the high-frequency current switching circuit of the fast frequency pulse current main circuit through an IGBT driving circuit.

[0039] As shown in Figure 3 , the control of the fast frequency double pulse current welding waveform is first that the ARM microprocessor sends a 100kHz 5V pulse voltage signal with a certain pulse width to the SiC driving circuit, the SiC driving circuit amplifies the 100kHz 5V pulse voltage to a 20V driving voltage signal, the 100kHz driving voltage drives the SiC MOSFET of the SiC MOSFET full-bridge inverter circuit to be turned on; the bus voltage Uin passes through the SiC MOSFET full-bridge inverter circuit, is stepped down by the high-frequency transformer, and then outputs direct current after the secondary full-wave rectifier circuit, the size of the direct current is controlled by the pulse width of the 100kHz driving signal, and the output main current I p and the secondary current I b are realized by changing the pulse width of the driving signal.

[0040] The main current I p and the secondary current I b are switched at a frequency of 50Hz, and a timer is used for control; when the main current I p is started, the SiC driving circuit is controlled to drive the SiC MOSFET with a large pulse width 100kHz pulse signal at this time, and the timer completes the set main current I p time tp; then the secondary current I b is started, the SiC driving circuit is controlled to drive the SiC MOSFET with a small pulse width 100kHz pulse signal at this time, and the timer completes the set secondary current I b time t b .

[0041] The whole main current I p and the secondary current I bIn the output stage, the control circuit sends a 20 kHz complementary PWM pulse signal to the IGBT drive circuit, and the IGBT drive circuit drives two IGBT power switches Q1 (series pipe) and Q2 (parallel pipe) to alternately conduct at 20 kHz (Q1 is on and Q2 is off, the main current I p or the auxiliary current I b is normally output through the Q1 pipe; when Q2 is on and Q1 is off, the current output is 0); in this way, the main current I p or the auxiliary current I b stage outputs a 20 kHz pulse current.

[0042] The control circuit controls the fast frequency pulse current main circuit to output a fast frequency pulse waveform and controls the base value current main circuit to output a base value waveform, and the fast frequency pulse waveform and the base value waveform are superimposed to together provide a fast frequency double pulse current welding waveform for the welding load.

[0043] The control circuit is also connected to an external wire feeding motor through a wire feeding drive circuit to control the wire feeding speed. As shown in Figure 4 , the wire feeding drive circuit includes a drive chip of model IR2110, a bootstrap circuit and a motor half-bridge drive circuit.

[0044] The pins HIN and LIN of the drive chip respectively receive two complementary PWM signals PWMH and PWML with a dead zone output by the control circuit; the pin HO of the drive chip is connected to the upper arm control input end of the motor half-bridge drive circuit; the pin LO of the drive chip is connected to the lower arm control input end of the motor half-bridge drive circuit; the pin VS of the drive chip is connected to the bootstrap circuit and is connected to the connection of the upper arm and the lower arm; the connection of the upper arm and the lower arm is connected to one end of the wire feeding motor; the other end of the wire feeding motor is grounded.

[0045] Specifically, the bootstrap circuit includes a capacitor C202, a capacitor C203 and a diode D201; the motor half-bridge drive circuit includes an N-channel field effect transistor Q201 and an N-channel field effect transistor Q202; the field effect transistor Q201 is located in the upper arm, and the field effect transistor Q202 is located in the lower arm; the D pole of the field effect transistor Q201 is connected to the drive power supply, the S pole of the field effect transistor Q201 is connected to the D pole of the field effect transistor Q202, and the S pole of the field effect transistor Q202 is grounded.

[0046] The pin HO of the driving chip is connected with the G pole of the field effect tube Q201 through the parallel diode D202 and the resistance R201; the G pole of the field effect tube Q201 is also connected with the S pole of the field effect tube Q201 through the resistance R202; the pin LO of the driving chip is connected with the G pole of the field effect tube Q202 through the parallel diode D203 and the resistance R203; the G pole of the field effect tube Q202 is also connected with the S pole of the field effect tube Q202 through the resistance R204; the S pole of the field effect tube Q201 is connected with the D pole of the field effect tube Q202, and the pin VS of the driving chip is connected with the connection position.

[0047] The principle of the wire feeding driving circuit is that the control circuit outputs two complementary PWM signals (PWMH and PWML) with dead zone to the driving chip IR2110. When PWMH is high and PWML is low, the field effect tube Q201 is reliably turned on and the field effect tube Q202 is turned off due to the action of the bootstrap circuit composed of the capacitors C202 and C203 and the diode D201, at this time, the voltage across the wire feeding motor is +24V, the wire feeding motor is in the high level of the pulse driving signal and starts to rotate. When PWMH is low and PWML is high, the field effect tube Q202 is turned on and the field effect tube Q201 is turned off, at this time, the positive and negative ends of the wire feeding motor are short-circuited to the GND ground wire end, and the wire feeding motor is in the low level of the pulse driving signal. By controlling the duty ratio of PWMH and PWML, the pulse width of the pulse driving signal acting on the wire feeding motor is controlled, so as to control the wire feeding speed. When the pulse width of PWMH is larger and the pulse width of PWML is smaller, the wire feeding speed is larger, and when the pulse width of PWMH is smaller and the pulse width of PWML is larger, the wire feeding speed is smaller. The resistance R201, the diode D202, the resistance R203 and the diode D203 respectively form the bleeder circuit of the field effect tube Q201 and the field effect tube Q202, so that the field effect tubes can be turned off quickly and the two field effect tubes are prevented from being turned on at the same time. The resistances R202 and R204 are input protection resistors of the field effect tube Q201 and the field effect tube Q202, which prevent the field effect tubes from being turned on accidentally due to static electricity and the like. In order to prevent the high-frequency noise signal of the analog circuit from being coupled to the digital circuit side, the ground end of the analog circuit and the ground end of the digital circuit are connected through the magnetic beads L201 and L202 at a single point.

[0048] The wire feeding speed peak value V p and the base value V b of the wire feeding driving circuit output are synchronized with the main current I p and the auxiliary current I b of the fast frequency double pulse current welding waveform, so that the wire feeding speed is matched with the stirring effect of the fast frequency double pulse current welding waveform on the molten pool.

[0049] As shown in Figure 5 , it is the integrated control process of the fast frequency welding power supply and the wire feeding motor driving; as shown in Figure 6The schematic diagram of the fast frequency double pulse current welding waveform and the wire feeding speed waveform is shown. After the user sets the additive power parameters, the welding gun switch is turned on, at which time the control system controls the arc starting circuit to start working, and the high frequency and high voltage between the tungsten electrode and the workpiece breaks the air to generate an arc. Next, the current waveform and the wire feeding speed synchronization period cycle process is entered: when the fast frequency pulse waveform enters the main current I p phase, the ARM microprocessor timer is timed; the ARM microprocessor controls the peak value of the fast frequency pulse waveform output by the fast frequency pulse current main circuit to be the main current I p , controls the base value waveform output by the base value current main circuit, which is I D in this embodiment, and controls the pulse driving signal output by the wire feeding driving circuit, and the pulse width of the pulse driving signal is the corresponding pulse width of the wire feeding speed peak value V p , so that the wire feeding speed reaches the peak value V p , until the ARM microprocessor timer timing completes the set main current I p time;

[0050] Then the fast frequency pulse waveform enters the secondary current I b phase, the ARM microprocessor timer is timed; the ARM microprocessor controls the peak value of the fast frequency pulse waveform output by the fast frequency pulse current main circuit to be the secondary current I b , controls the base value waveform output by the base value current main circuit, and controls the pulse driving signal output by the wire feeding driving circuit, and the pulse width of the pulse driving signal is the corresponding pulse width of the wire feeding speed base value V b , so that the wire feeding speed reaches the base value V b , until the ARM microprocessor timer timing completes the set secondary current I b time;

[0051] The main current I p is greater than the secondary current I b ; the wire feeding speed peak value V p is greater than the wire feeding speed base value V b ;

[0052] The main current I p phase and the secondary current I b phase are repeatedly entered until the welding is stopped.

[0053] Fig. 7(a) and Fig. 7(b) are cross-sectional grain effect diagrams of fast frequency pulse TIG non-synchronous wire feeding arc additive parts and fast frequency pulse TIG synchronous wire feeding arc additive parts of the present application. When the fast frequency non-synchronous wire feeding process is used, in order to ensure the additive part forming, it is necessary to ensure that the welding wire is in the secondary current I bThe stage can be melted, and a small wire feeding speed is used for the additive manufacturing. This makes the thickness of each layer thin, more heat is accumulated in each layer, and thus the grains of the additive part grow columnar from the bottom to the top. The fast-frequency pulse TIG synchronous wire feeding additive manufacturing process can increase the wire feeding speed in the main current I p stage, the thickness of each layer of the additive part is increased, the increased wire feeding amount can absorb the heat of the peak current, the heat accumulation of the additive part is reduced, the cooling speed of the molten pool is increased, a large number of equiaxed crystals appear in the solidification and growth process of the molten pool, the grains of the additive part are refined, and the mechanical properties of the additive part are improved.

[0054] The above embodiment is a preferred embodiment of the present application, but the embodiment of the present application is not limited to the above embodiment, and any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the present application should be an equivalent replacement mode, and all are included in the protection scope of the present application.

Claims

1. A fast-frequency arc additive power supply and wire feed drive integrated control circuit, characterized by: It includes a fast-frequency pulse current main circuit, a base current main circuit, a control circuit and a wire feeding drive circuit; The control circuit is connected to the fast-frequency pulse current main circuit and the base current main circuit respectively through the welding power drive circuit to control the fast-frequency pulse current main circuit to output a fast-frequency pulse waveform and to control the base current main circuit to output a base waveform. The fast-frequency pulse waveform and the base waveform are superimposed to jointly provide a fast-frequency double-pulse current welding waveform for the welding load; The control circuit is also connected to the external wire feeding motor through the wire feeding drive circuit, and the wire feeding speed is controlled by controlling the pulse width of the pulse driving signal output by the wire feeding drive circuit; the wire feeding speed peak value V p and base value V b Respectively with the fast frequency pulse waveform main current I p and the secondary current I b Synchronize so that the wire feed speed matches the stirring effect of the fast-frequency double-pulse current welding waveform on the molten pool.

2. The integrated control circuit of the fast-frequency arc additive power supply and wire feed drive according to claim 1, characterized in that: The wire feeding drive circuit includes a drive chip of model IR2110, a bootstrap circuit and a motor half-bridge drive circuit.

3. The integrated control circuit of the fast-frequency arc additive power supply and wire feed drive according to claim 2, characterized in that: The pins HIN and LIN of the driver chip respectively receive the two complementary PWM signals PWMH and PWML with dead zones output by the control circuit; the pin HO of the driver chip is connected to the upper arm control input terminal of the motor half-bridge drive circuit; The pin LO of the driver chip is connected to the lower bridge arm control input end of the motor half-bridge driver circuit; the pin VS of the driver chip is connected to the bootstrap circuit and is connected to the connection between the upper bridge arm and the lower bridge arm; the connection between the upper bridge arm and the lower bridge arm is connected to one end of the wire feeding motor; the other end of the wire feeding motor is grounded.

4. The integrated control circuit of the fast-frequency arc additive power supply and wire feed drive according to claim 3, characterized in that: The bootstrap circuit includes a capacitor C202, a capacitor C203 and a diode D201; the motor half-bridge drive circuit includes an N-channel field effect transistor Q201 and an N-channel field effect transistor Q202; the N-channel field effect transistor Q201 is located in the upper bridge arm, and the N-channel field effect transistor Q202 is located in the lower bridge arm; the D pole of the N-channel field effect transistor Q201 is connected to the driving power supply, the S pole of the N-channel field effect transistor Q201 is connected to the D pole of the N-channel field effect transistor Q202, and the S pole of the N-channel field effect transistor Q202 is grounded; Pin HO of the driver chip is connected to the G-pole of an N-channel field effect transistor Q201 via a parallel diode D202 and a resistor R201; the G-pole of the N-channel field effect transistor Q201 is also connected to the S-pole of the N-channel field effect transistor Q201 via a resistor R202; pin LO of the driver chip is connected to the G-pole of the N-channel field effect transistor Q202 via a parallel diode D203 and a resistor R203; the G-pole of the N-channel field effect transistor Q202 is also connected to the S-pole of the N-channel field effect transistor Q202 via a resistor R204; and the junction between the S-pole of the N-channel field effect transistor Q201 and the D-pole of the N-channel field effect transistor Q202 is connected to pin VS of the driver chip.

5. The integrated control circuit of the fast-frequency arc additive power supply and wire feed drive according to claim 1, characterized in that: The fast-frequency pulse current main circuit and the base current main circuit both include a SiC MOSFET full-bridge inverter circuit, a high-frequency transformer, and a full-wave rectifier circuit connected in sequence; the fast-frequency pulse current main circuit also includes a high-frequency current switching circuit connected to the rear side of the full-wave rectifier circuit; wherein the SiC MOSFET full-bridge inverter circuit is connected to an external power supply through a rectifier and filter circuit; the high-frequency current switching circuit of the fast-frequency pulse current main circuit is connected in parallel with the full-wave rectifier circuit of the base current main circuit, and then connected to the welding load; The control circuit is connected to the SiCMOSFET full-bridge inverter circuit of the fast-frequency pulse current main circuit and the base current main circuit through the SiC drive circuit respectively; the control circuit is connected to the high-frequency current switching circuit of the fast-frequency pulse current main circuit through the IGBT drive circuit.

6. The integrated control circuit of the fast-frequency arc additive power supply and wire feed drive according to claim 5, characterized in that: During the fast-frequency dual-pulse current welding waveform output process, the control circuit controls the peak value of the fast-frequency pulse waveform through the SiC drive circuit, and controls the high-frequency current switching circuit through the IGBT drive circuit to form a high-frequency complementary PWM pulse, thereby generating a fast-frequency pulse waveform.

7. The integrated control circuit of the fast-frequency arc additive power supply and wire feed drive according to claim 1, characterized in that: The control circuit includes an ARM microprocessor.

8. The control method of the integrated control circuit of the fast-frequency arc additive power supply and wire feed drive according to claim 7, characterized in that: The control method for matching the wire feeding speed with the stirring effect of the fast-frequency double-pulse current welding waveform on the molten pool is: When the fast-frequency pulse waveform enters the main current I p During the phase, the ARM microprocessor timer performs timing; the ARM microprocessor controls the fast-frequency pulse current main circuit to output the fast-frequency pulse waveform peak value as the main current I p , control the base current main circuit to output base waveform, and control the wire feeding drive circuit to output pulse drive signal, the pulse width of the pulse drive signal is the peak value of the wire feeding speed V p The corresponding pulse width makes the wire feeding speed reach the peak value V p Until the ARM microprocessor timer completes the set main current I p time; Then the fast frequency pulse waveform enters the secondary current I b In the stage, the ARM microprocessor timer performs timing; the ARM microprocessor controls the fast-frequency pulse current main circuit to output the fast-frequency pulse waveform peak value as the auxiliary current I b , control the base current main circuit to output base waveform, and control the wire feeding drive circuit to output pulse drive signal, the pulse width of the pulse drive signal is the wire feeding speed base value V b The corresponding pulse width makes the wire feeding speed reach the base value V b Until the ARM microprocessor timer completes the setting of the secondary current I b time; Repeatedly enter the main current I p Phase and secondary current I b stage until welding stops.

9. The control method according to claim 8, characterized in that: The main current I p >Secondary current I b ; Wire feeding speed peak V p >Wire feeding speed base value V b .

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