CN2090295U

CN2090295U - Microcomputer-controlled submerged-arc welder

Info

Publication number: CN2090295U
Application number: CN 91210818
Authority: CN
Inventors: 郭忠实; 阎明礼
Original assignee: Unit No81872 Cpla
Current assignee: Unit No81872 Cpla
Priority date: 1991-07-01
Filing date: 1991-07-01
Publication date: 1991-12-11

Abstract

The utility model discloses a submerged-arc welding automatic welding device, comprising a welding power source, a welding handle with a welding car and a control unit whose controlling circuit comprises a welding voltage controlling ring, a welding electric current controlling ring and a welding speed controlling ring. Three signals of an arc voltage, an electric current and speed which are tested by the welding power source, a work piece and the welding handle, are respectively inputted to the CPU of the control unit, which achieves a high quality welding through magnifying shaping, photoelectric isolation and driving after the CPU is treated. The utility model has the advantages of stable and reliable welding process, beautiful appearance, powerful interference rejection, and convenient popularization and use.

Description

Microcomputer-controlled submerged-arc welder

The utility model relates to a kind of submerged-arc welding automatic welding device.The welding machine that is widely used at present, its structure all is to be made of power supply box, electrode holder two parts of having a welding wire, connect with cable between electrode holder and the power supply box, this kind welding machine all is manual operations to welded piece, its shortcoming is: welding quality is not good, speed of welding is slow, wastes energy, and that gives welding personnel healthyly brings very big harm.

For solving above deficiency, it is a kind of with micro-processor controlled automatic submerged-arc welding machine that the purpose of this utility model provides, by the source of welding current, utilization has the control of microcomputer device, the electrode holder that has welding tractor is controlled accurately, thereby realize that welding process is stable, what appearance of weld was attractive in appearance welds the workpiece automatic submerged-arc.

Design of the present utility model is to realize like this, according to the inherent characteristic of automatic welder(welding machine), promptly in welding process, influence the welding quality quality and mainly contain three important parameters, weldingvoltage, welding current and speed of welding can be represented W=K.VI/V by mathematical formulae.W-heat input, K-constant, U-arc voltage, I-welding current, V-speed of welding.Verify according to the theory analysis and the work of putting into practice, above three parameters must be controlled in the reasonable technological parameter scope relatively stablely as reaching high quality welding, for overcoming in the welding process welding quality that influences owing to human factor and power network fluctuation factor and equipment heat fatigue factor, above three main welding parameters are controlled in the reasonable technological parameter scope relatively stablely, for overcoming in the welding process welding quality that influences owing to human factor and power network fluctuation factor and equipment heat fatigue factor, adopt three links to control respectively to above three main welding parameters, it promptly is the weldingvoltage control loop, the welding current control loop, the speed of welding control loop, by microcomputer three parameters are organically combined then, realize Optimal Control, concrete structure of the present utility model, by welding is the source, the welding head and controller three parts that have welding tractor are formed, the negative pole of the source of welding current is received on the welded piece, and positive pole is connected on the welding gun; On the head handle, DC servo motor is housed, driving welding wire by the mechanical gear transmission moves forward and backward, at the source of welding current output current diverter (FI) is housed, head is contained on the welding tractor, welding tractor and head are fixed together, DC servo motor and earpiece suddenly are housed on welding tractor, advance or retreat by the driven by motor dolly; Controller built-in circuit control panel, the CPU processor is housed on control panel, be MOS8098, be connected to operational amplifier with CPU, filter circuit, the AD interface, logic is judged, parts such as PID arithmetic unit, specifically control shown in block diagram, by arc voltage detection signal between welding gun and the workpiece, current detection signal on the current diverter (FI) is sent into controller simultaneously, carrying out data through CPU handles, to handle the back control signal through amplifying shaping, the photoelectricity isolation drive is carried out wire feed control by wire feeder at last, simultaneously through amplifying shaping, photoisolator, the control circuit of the driving source of welding current, the size of electric current is supplied with in control; The speed that welding tractor is advanced is sent into CPU by speed detector and is carried out the data processing, again through amplifying shaping, photoisolator, drive the welding tractor motor, control welding tractor gait of march, more than three control loops control by CPU respectively, three parameters are organically connected in CPU.

The utility model has following advantage compared with the prior art: this device is with the welding of MOS-8098 microcomputer control automatic submerged-arc welding machine to workpiece, welding process is stable, bead contour is attractive in appearance, system works is reliable and stable, stronger anti-interference ability is arranged, be a kind of comparatively ideal automatic submerged-arc welding machine, be convenient to promote the use of.

Detailed structure of the present utility model is provided by following examples and accompanying drawing.

Know by Fig. 1, (1) is the source of welding current, join with the 380V power supply, its output one end (negative pole) is received on the welding work pieces (5), the other end (positive pole) is connected on the welding gun (4), motor is housed on the welding gun (4) makes a mechanism (7) and current diverter (10), welding tractor (3) is equipped with in electrode holder (4) side, motor (8) and earpiece (9) suddenly are housed on welding tractor (3), (2) be controller, on the panel of controller (2), power switch is housed, start stop switch, keyboard button, indicator lamp and charactron show, can find out three control loops by the control block diagram, concrete voltage, current detection signal is by shown in Figure 6,220V is a working power, Uf is the arc voltage signal, and If is a current signal, sends into CPU simultaneously, current signal is taken out after high precision operating amplifier by current divider (FI)) send controller AD mouth after OP-O7 and the filter circuit filtering, by CPU control it is sampled, digital filtering, logic is judged, the PID computing, obtain the correction value of controlled quentity controlled variable at last, obtain more accurate controlled quentity controlled variable, send with pulsewidth modulation square wave form again, send signal and amplify shaping through triode, photoelectricity is isolated, and driving should be managed in high-power effect field, passes through KA ₁KA ₂The control circuit of the control source of welding current, make welding current (as shown in Figure 7) within the limits prescribed, speed of welding control is that the welding tractor speed of travel is conversed passing on of direct current generator, realize the control of butt welding speed indirectly by the rotating speed of control direct current generator, the speed of direct current generator provides with the pulse signal form by Hall sensor, delivers to computer and specifies the input port.CPU detects the assorted numerical value of this passage in real time, compares with setting as calculated, and logic is judged and PID calculates this output controlled quentity controlled variable.As the amount of feeding of Fig. 3 realization to welding wire, Fig. 4 realizes the control of butt welding vehicle speed, M ₁, M ₂Be respectively DC servo motor.

Claims

1, a kind of microcomputer control automatic submerged-arc welding machine, form by the source of welding current and electrode holder, it is characterized in that this welding machine is by the source of welding current (1), the welding gun (4) and controller (2) three parts that have welding tractor (3) are formed, the control circuit of its controller (2) is by the weldingvoltage control loop, and welding current control loop and speed of welding control loop are formed.

2, by the described microcomputer control automatic submerged-arc welding machine of claim 1, it is characterized in that on electrode holder (4), being equipped with DC servo motor (7), drive welding wire (6) by gear transmission and move forward and backward, current diverter (FI) (10) is housed on electrode holder (4) simultaneously.

3, by the described microcomputer control automatic submerged-arc welding machine of claim 1, it is characterized in that welding tractor (3) being housed in the side of welding gun (4), welding tractor (3) and welding gun (4) are fixed together, and direct current Dong clothes motor (8) and earpiece (9) suddenly are housed on welding tractor (3).

4, by the described microcomputer control Unionmelt welding machine of claim 1, it is characterized in that the weldingvoltage control loop sends into CPU by the arc voltage signal that the source of welding current (1), workpiece (5) and electrode holder (4) are detected, CPU output is by amplifying shaping, and photoelectricity is isolated, and drives wire feeder feeding welding wire.

5, by the described microcomputer control automatic submerged-arc welding machine of claim 1, it is characterized in that current regulator sends into CPU by the welding current signal that the source of welding current (1), workpiece (5) and current divider (FI) detect, CPU output is by amplifying shaping, and photoelectricity is isolated, and drives the control circuit of the source of welding current.

6, by the described microcomputer control automatic submerged-arc welding machine of claim 1, it is characterized in that the speed of welding control loop sends into CPU by the motor speed signal that the earpiece suddenly (9) on the welding tractor (3) detects, CPU output by amplify shaping, direct current generator (8) on the welding tractor is isolated, driven to photoelectricity.