Digital welding machine with fine welding waveform
A welding machine and waveform technology, applied in welding equipment, manufacturing tools, arc welding equipment, etc., can solve problems such as small bridge gasification explosion, small bridge heating, metal spatter, etc., to improve weld formation, prevent spatter, The effect of overcoming dependence on operational experience
Active Publication Date: 2015-06-10
GUANGZHOU CHANGSHENG ELECTROMECHANICAL
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Problems solved by technology
As the current increases and the necking decreases, the current density at the small bridge increases rapidly, which heats the small bridge rapidly, resulting in the accumulation of excess energy, and finally causes the gasification explosion of the small bridge, and at the same time causes metal splashing
Method used
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Embodiment Construction
[0034] Such as Figure 2 to Figure 6 As shown, a digital welding machine with a good welding waveform includes an inverter main circuit unit 1 , a PWM control unit 2 , a controller 3 , a signal detection unit 4 and a state detection unit 5 . see figure 2 , figure 2 Shown is a schematic structural diagram of the control system of the digital welding machine of the present invention, the inverter main circuit unit 1 is used to control the opening / closing of the output circuit 6, and the controller 3 according to the detection signal of the signal detection unit 4 and the state detection unit The state signal of 4 controls the PWM control unit 2 to send a control signal to control the inverter main circuit unit 1 to turn on / off. The effective value of the output current is adjusted by controlling the ratio of the turn-on time of the inverter main circuit unit 1 to the sum of the turn-on time and the turn-off time, that is, the duty cycle.
[0035] see image 3 , image 3 S...
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The invention discloses a digital welding machine with a fine welding waveform, which comprises a main inverter circuit unit, a signal detection unit, a PWM (pulse-width modulation) control unit, a state detection unit and a controller, wherein the main inverter circuit unit is used for controlling on / off of an output circuit of the welding machine, the signal detection unit is used for detecting current signals and voltage signals of the output circuit of the welding machine, the PWM control unit is connected with the main inverter circuit unit and used for controlling on / off of the main inverter circuit unit according to controller signals transmitted by the controller, the state detection unit is used for judging the current output state of the output circuit of the welding machine according to the signals detected by the signal detection unit, and the controller is used for receiving detection signals and state judgment of the signal detection unit and controlling the PWM control unit. Compared with the prior art, the digital welding machine has the advantages that by timely detecting the current welding state and controlling output current, sputtering in the welding process is effectively prevented, and weld formation is improved.
Description
technical field [0001] The invention relates to an electric welding machine control system, in particular to a digital electric welding machine capable of good welding waveform. Background technique [0002] Current gas shielded welding machines are generally controlled by analog circuits, please refer to figure 1 , Control the output of the welding machine through switching devices such as IGBT. The detection of the output feedback of the welding machine is generally the output voltage, the output current or the combination of the two, and the error signal is obtained in the form of the reference given input signal. Proportional-integral (PI) control method is performed on the error signal to obtain a control signal with steady-state precision and anti-high frequency and anti-interference ability to control the conduction of the IGBT. [0003] Due to the large number of control components of the simulated welding machine, the ability to control the welding current and vol...
Claims
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IPC IPC(8): B23K9/10B23K9/095B23K9/16
Inventor 杜长禄余棉水温自力温清松
Owner GUANGZHOU CHANGSHENG ELECTROMECHANICAL