CN110548957B

CN110548957B - Automatic argon arc welding machine

Info

Publication number: CN110548957B
Application number: CN201910942710.9A
Authority: CN
Inventors: 邱德敏
Original assignee: Wuxi Haiying Engineering Equipment Co ltd
Current assignee: Wuxi Haiying Engineering Equipment Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2021-09-03
Anticipated expiration: 2039-09-30
Also published as: CN110548957A

Abstract

The invention discloses an automatic argon arc welding machine, and belongs to the field of welding machines. The method comprises the following steps: the device comprises an operation module, a relay module, a direct current motor module, a transformer module, a direct current speed regulation module, a programmable control module, an argon arc welding machine module, a box regulation and box regulation module, a photoelectric control module and a switching power supply module; the operation module and the photoelectric control module are connected with the input point of the programmable control module, and the relay module is connected with the output point of the programmable control module; the direct current motor module and the box adjusting module are respectively connected with the direct current speed adjusting module; the input of the transformer module is connected with a three-phase power supply; the argon arc welding machine module is connected with a three-phase power supply; the switch power supply module is respectively connected with the photoelectric control module and the programmable control module. The invention has reliable welding quality, low failure rate and convenient operation.

Description

Automatic argon arc welding machine

Technical Field

The invention relates to the field of welding machines, in particular to an automatic argon arc welding machine.

Background

The argon arc welding technology is a welding technology which utilizes the protection of argon gas to metal welding materials on the basis of the principle of common electric arc welding, so that the tip of a tungsten electrode, electric arc, a molten pool and high-temperature metal adjacent to a heat affected zone are not contacted with air, the oxidation of the welding materials is prevented, and the welding materials are melted into a liquid molten pool through welding current, so that the welded metal achieves metallurgical bonding. Stainless steel, low carbon steel, etc., as well as some refractory metals and readily oxidizable metals such as magnesium, titanium, molybdenum, zirconium, aluminum, etc., and alloys thereof, can be welded because the inert gas argon is continuously provided in high temperature welding.

The argon arc welding machine has the advantages of stable electric arc, concentrated heat, small stress deformation, small electrode loss, no solvent or coating during welding, but the argon arc welding machine in the market at present has low mechanization and automation degree, the welding quality cannot be guaranteed, and the operation is not convenient enough.

Disclosure of Invention

The embodiment of the invention provides an automatic argon arc welding machine. The technical scheme is as follows:

an automatic argon arc welding machine is provided, which comprises: the device comprises an operation module, a relay module, a direct current motor module, a transformer module, a direct current speed regulation module, a programmable control module, an argon arc welding machine module, a box regulation and box regulation module, a photoelectric control module and a switching power supply module;

the operation module is connected with an input point of the programmable control module, the programmable control module is used for realizing the logic control of the argon arc welding machine module, and the operation module is used for providing an operation button; the relay module is connected with an output point of the programmable control module and is used for working under the control of the programmable control module; the direct current motor module and the box adjusting module are respectively connected with the direct current speed regulating module, the direct current motor module is used for driving the welding rotary table to rotate, the box adjusting module is used for regulating the rotating speed of the welding rotary table, and the direct current speed regulating module is used for regulating the armature voltage of the direct current motor to realize stepless speed regulation of the welding rotary table; the input of the transformer module is connected with a three-phase power supply and is used for converting the three-phase power supply into different alternating-current voltages for supplying power; the argon arc welding machine module is connected with a three-phase power supply and is used for welding a workpiece; the photoelectric control module and the operation module are connected with an input point of the programmable control module, and the photoelectric control module is used for realizing origin detection and seam detection; the switch power supply module is respectively connected with the photoelectric control module and the programmable control module and used for supplying power to the photoelectric control module and the programmable control module.

Optionally, the operation module includes a power on button, a power off button, a forward rotation button, a reverse rotation button, an adjusting and welding knob, a welding mode knob, a foot switch, a start button, and a stop button;

when the power switch-on button is pressed, 380V alternating current power supply is provided for the argon arc welding machine module;

the 380V alternating current power supply of the argon arc welding machine module is cut off when the power supply cut-off button is pressed;

when the forward rotation button is pressed down, the direct current motor module is controlled to drive the welding rotary table to rotate forward;

when the reversing button is pressed down, the direct current motor module is controlled to drive the welding rotary table to reverse;

the origin contact is a normally open contact inside the photoelectric control module and is used for detecting and positioning the origin of the welding rotary table;

the joint contact is a normally open contact inside the photoelectric control module and is used for detecting and adjusting the length of a welding joint;

when the adjusting and welding knob is rotated to an adjusting position, the argon arc welding machine module is controlled to be in an adjusting state, and when the adjusting and welding knob is rotated to a welding position, the argon arc welding machine module is controlled to be in a welding mode state;

when the welding mode knob is rotated to a girth welding position, the argon arc welding machine module is controlled to be in a girth welding state, when the welding mode knob is rotated to a repair welding position, the argon arc welding machine module is controlled to be in a repair welding state, and when the welding mode knob is rotated to a middle neutral position, the argon arc welding machine module is controlled to be in a spot welding state;

when the pedal switch is stepped, the argon arc welding machine module is controlled to perform spot welding on a workpiece;

the starting button controls the argon arc welding machine module to start welding when the girth welding state or the repair welding state is pressed;

and the stop button controls the argon arc welding machine module to stop welding when the girth welding state or the repair welding state is pressed.

Optionally, the relay module includes a first relay, a second relay, a first contactor, a second contactor, a third relay, a fourth relay, a fifth relay, and a power indicator;

the first relay is attracted to drive the first contactor to be attracted, an armature loop of the direct current motor module is connected, and the direct current motor module rotates forwards;

the second relay is actuated to drive the second contactor to actuate, an armature loop of the direct current motor module is switched on, and the direct current motor module rotates reversely;

the first contactor and the second contactor are logically interlocked, when the first contactor and the second contactor are released, the normally closed contacts corresponding to the first contactor and the second contactor are closed, the direct current motor module is in an energy consumption braking state, and the welding rotary table is controlled to stop;

the third relay is an electrified time delay type time relay, and when the start button is pressed down to start welding, the welding rotary table starts to rotate after delaying for a preset time;

the fourth relay is attracted when the starting button is pressed down to drive a normally open contact of the fourth relay to be closed, and the argon arc welding machine module obtains a welding control signal to start welding;

the fifth relay is actuated when the power supply on button is pressed to drive the third contactor to be actuated, the argon arc welding machine module obtains a 380V alternating current power supply, and the fifth relay is released when the power supply off button is pressed to drive the third contactor to be released to cut off the 380V alternating current power supply of the argon arc welding machine module;

the power indicator lights up when the power on button is pressed and lights off when the power off button is pressed.

Optionally, the dc motor module includes a dc motor and a brake resistor, the dc motor is configured to drive the welding turntable to rotate, the dc motor includes an excitation coil with an excitation voltage of dc 100V, and the brake resistor is configured to perform energy consumption braking on the dc motor, so as to stop the welding turntable;

the transformer module is used for converting a 380V alternating-current power supply into three alternating-current voltages of 220V, 110V and 24V, the 220V alternating-current voltage supplies power to the direct-current speed regulation module, the 110V alternating-current voltage supplies power to coils of the first contactor, the second contactor and the third contactor, and the 24V alternating-current voltage supplies power to an illuminating lamp;

the direct current speed regulating module is matched with the first contactor and the second contactor to realize positive and negative rotation and energy consumption braking of the welding rotary table;

the programmable control module is used for realizing the logic control of the argon arc welding machine module, and the logic control at least comprises logic interlocking, time delay, counting, mode selection, welding and motor rotation;

the box adjusting module comprises a box adjusting button switch, a box adjusting potentiometer and a box adjusting potentiometer, wherein when the box adjusting button switch is in a box adjusting position, the box adjusting potentiometer is used for adjusting the rotating speed of the welding rotary table, and when the box adjusting button switch is in the box adjusting position, the box adjusting potentiometer is used for adjusting the rotating speed of the welding rotary table;

the photoelectric control module comprises a first photoelectric sensor and a second photoelectric sensor, wherein the first photoelectric sensor is used for realizing origin detection, and the second photoelectric sensor is used for realizing seam detection;

the switching power supply module comprises a first switching power supply and a second switching power supply; the input of the first switching power supply is 220V alternating current, the output of the first switching power supply is 12V direct current, and the first switching power supply is used for supplying power to the photoelectric control module; the input of the second switching power supply is 220V alternating current, and the output of the second switching power supply is 24V direct current and is used for supplying power to the output loop of the programmable control module.

The technical scheme provided by the embodiment of the invention has the following beneficial effects:

the automatic argon arc welding machine composed of the operation module, the relay module, the direct current motor module, the transformer module, the direct current speed regulation module, the programmable control module, the argon arc welding machine module, the box regulation module, the photoelectric control module and the switching power supply module can be used for girth welding of thin-wall stainless steel parts, welding wires are not needed during welding, the welding wires are heated and melted and welded together by means of argon arc welding, the welding lines are smooth and attractive, the sealing performance is good, the automatic argon arc welding machine can be used for a long time, the welding quality is reliable, the fault rate is low, and the operation is convenient. The operation input signal is connected to the input end of the programmable control module, the interior is photoelectrically isolated, the anti-interference capability is strong, the output is controlled by the relay module, and the welding rotary table adopts soft start to eliminate the shaking phenomenon during start.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is an electrical schematic diagram of an automatic argon arc welding machine in accordance with an exemplary embodiment of the present invention;

fig. 2 is a schematic diagram of a dc governor according to an exemplary embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is an electrical schematic diagram of an automatic argon arc welding machine according to an exemplary embodiment of the present invention, and as shown in fig. 1, the automatic argon arc welding machine may include: the device comprises an operation module 101, a relay module 102, a direct current motor module 103, a transformer module 104, a direct current speed regulation module 105, a programmable control module 106, an argon arc welding machine module 107, a box regulation and box regulation module 108, a photoelectric control module 109 and a switching power supply module 110.

Optionally, the argon arc welding module 107 adopts a SANREX IA-3001TP TIG welding machine, and the main technical parameters of the welding machine of this type include: the power supply comprises a rated input voltage of 380V and 50/60Hz, a rated input power of 16kVA, a rated output current of 300A, a rated output voltage of 22V, a maximum no-load voltage of 57V, an output current regulation range of DC5-300A and AC 10-300A. The main parameters that can be set by the operation panel include: the pre-flow time is 0-1 second, the initial current is 5-300A, the rise time is 0-15 seconds, the peak current is 5-300A, the base current is 5-300A, the spot welding time is 0.5-5 seconds, the pulse width is 15-80%, the pulse frequency is 0.5-500Hz, the fall time is 0-25 seconds, the fire hole current is 5-300A, and the lag air flow is 0-60 seconds. In practical application, according to the technological requirements of the weldment such as material, thickness, weld seam width and the like, corresponding welding parameters are adjusted through a panel key and a knob of the TIG welding machine, so that the TIG welding machine is in the state of the optimal welding performance. As shown in figure 1, the positive pole of the welding machine is grounded, the negative pole is connected with the welding gun, a normally open contact of a fourth relay KA4 is connected between pins 2 and 3, and pins 5, 6 and 7 are connected with a current regulation potentiometer RP 1.

The operation module 101 is connected with an input point of a programmable control module 106, the programmable control module 106 is used for realizing the logic control of an argon arc welding machine module 107, and the operation module 101 is used for providing an operation button; the relay module 102 is connected with an output point of the programmable control module 106, and the relay module 102 is used for working under the control of the programmable control module 106; the direct current motor module 103 and the box adjusting module 108 are respectively connected with the direct current speed regulating module 105, the direct current motor module 103 is used for driving the welding turntable to rotate, the box adjusting module 108 is used for adjusting the rotating speed of the welding turntable, and the direct current speed regulating module 105 is used for adjusting the armature voltage of the direct current motor to realize stepless speed regulation of the welding turntable; the input of the transformer module 104 is connected to a three-phase power supply, and is configured to convert the three-phase power supply into different ac voltages for supplying power; the argon arc welding machine module 107 is connected with the three-phase power supply, and the argon arc welding machine module 107 is used for welding the workpiece; the photoelectric control module 109 is connected with the input point of the programmable control module 106, and the photoelectric control module 109 is used for realizing origin detection and seam detection; the switching power supply module 110 is connected to the optoelectronic control module 109 and the programmable control module 106, respectively, and is configured to supply power to the optoelectronic control module 109 and the programmable control module 106.

As shown in fig. 1, the operation module 101 includes a power on button SB1, a power off button SB2, a forward rotation button SB3, a reverse rotation button SB4, an origin contact KA6, a seam contact KA7, an adjustment and welding knob SA1, a welding mode knob SA2, a foot switch K3, a start button SB5, and a stop button SB 6.

When the power switch-on button SB1 is pressed, the third contactor KM3 is pulled in, and 380V alternating current power is provided for the argon arc welding machine module 107.

When the power supply disconnection button SB2 is pressed, the third contactor KM3 is released, and 380V alternating current power supply of the argon arc welding machine module 107 is cut off.

When the forward rotation button SB3 is pressed, the first contactor KM1 is attracted, and the direct current motor module 103 is controlled to drive the welding rotary table to rotate forward.

When the reverse button SB4 is pressed, the second contactor KM2 is attracted, and the direct current motor module 103 is controlled to drive the welding rotary table to reversely rotate.

The KA6 origin contact is a normally open contact inside the optoelectronic control module 109 for detecting and positioning the origin of the welding turret.

The joint contact KA7 is a normally open contact inside the optoelectronic control module 109 for detecting and adjusting the length of the weld joint.

When the adjusting and welding knob SA1 rotates to the adjusting position, the argon arc welding machine module 107 is controlled to be in the adjusting state, and when the adjusting and welding knob SA1 rotates to the welding position, the argon arc welding machine module 107 is controlled to be in the welding mode state (girth welding, repair welding or spot welding).

In the mode of adjustment, welding cannot be performed, and the welding part is used for adjusting and fixing the welding part on the rotary table, for example, the welding part is clamped and fixed firmly, the welding part is prevented from being eccentric and inclined, the length of a seam is adjusted, and the length of the seam refers to the overlapping length of the welding seam in girth welding.

When the welding mode knob SA2 rotates to the ring welding position (SA2-1), the argon arc welding machine module 107 is controlled to be in the ring welding state, when the welding mode knob SA2 rotates to the repair welding position (SA2-2), the argon arc welding machine module 107 is controlled to be in the repair welding state, and when the welding mode knob SA2 rotates to the middle neutral position, the argon arc welding machine module 107 is controlled to be in the spot welding state.

When the foot switch K3 is pressed, the argon arc welding machine module 107 is controlled to perform spot welding on the workpiece.

The SB5 start button controls the argon welder module 107 to start welding when the girth welding state or the repair welding state is pressed.

The stop button SB6 controls the argon arc welder 107 module to stop welding when the girth welding state or the repair welding state is pressed.

As shown in fig. 1, the relay module 102 includes a first relay KA1, a second relay KA2, a first contactor KM1, a second contactor KM2, a third contactor KM3, a third relay SJ1, a fourth relay KA4, a fifth relay KA5, and a power indicator HL 2.

The first relay KA1 is attracted to drive the first contactor KM1 to be attracted, an armature loop of the direct current motor module 103 is connected, and the direct current motor module 103 rotates forwards.

The second relay KA2 is attracted to drive the second contactor KM2 to be attracted, an armature loop of the direct current motor module 103 is connected, and the direct current motor module 103 rotates reversely.

The first contactor KM1 and the second contactor KM2 are in logic interlocking, when the first contactor KM1 and the second contactor KM2 are released, the normally closed contacts corresponding to the first contactor KM1 and the second contactor KM2 are closed, the direct current motor module 103 is in a dynamic braking state, and the welding turntable is controlled to stop.

The third relay SJ1 is an electrified time delay type time relay, and when the start button SB5 is pressed to start welding, the welding rotary table starts to rotate after delaying for a preset time. That is, the welding rotary table is not rotated immediately, but is rotated after a while, and the time delay time can be adjusted by a time relay SJ1 panel knob.

The fourth relay KA4 is attracted when the start button SB5 is pressed down, the normally open contacts (line numbers 10 and 11) of the fourth relay KA4 are driven to be closed, and the argon arc welding machine module 107 obtains a welding control signal to start welding.

The fifth relay KA5 is attracted when the power supply on button SB1 is pressed down to drive the third contactor KM3 to be attracted, the argon arc welding machine module 107 obtains 380V alternating current power supply, and the fifth relay KA5 is released when the power supply off button SB2 is pressed down to drive the third contactor KM3 to be released, so that the 380V alternating current power supply of the argon arc welding machine module 107 is cut off.

The power indicator lamp HL2 lights up when the power on button SB1 is pressed, and lights out when the power off button SB2 is pressed.

Referring to fig. 1 in combination, the dc motor module 103 includes a dc motor FM-12 and a braking resistor R1, the dc motor FM-12 is used for driving the welding turret to rotate, the dc motor FM-12 includes an excitation coil with an excitation voltage of 100V dc, and the braking resistor R1 is used for dynamic braking of the dc motor FM-12 to stop the welding turret.

Illustratively, DC motor FM-12 has a voltage of 68V, a power of 35W, and a current of 0.8A. With reference to fig. 1, one end of the dc motor FM-12 is connected to the normally open contacts of the first contactor KM1, the braking resistor R1 and the second contactor KM2, and the other end is connected to the normally open contacts of the second contactor KM2, the normally closed contact of the second contactor KM2 and the normally open contact of the first contactor KM1, the normally open contact of the first contactor KM1 is connected to the normally open contact of the second contactor KM2, and the braking resistor R1 is connected to the normally closed contact of the first contactor KM1 and the normally closed contact of the second contactor KM2 in series.

The transformer module 104 is used for converting a 380V alternating current power supply into three alternating current voltages of 220V, 110V and 24V, the 220V alternating current voltage supplies power to the direct current speed regulation module 105, the 110V alternating current voltage supplies power to coils of the first contactor KM1, the second contactor KM2 and the third contactor KM3, and the 24V alternating current voltage supplies power to the illuminating lamp HL 1. Optionally, the transformer module 104 includes a control transformer BK150, an input end of the control transformer BK150 is connected in series with a fuse FU4 to be connected to a 380V three-phase ac power supply, three output ends of the control transformer BK150 are respectively connected in series with three fuses FU1, FU2, FU3, and 220V ac voltage to respectively supply power to the switching power supply module 110 and the programmable control module 106. 110V alternating voltage respectively supplies power for coils of a first contactor KM1, a second contactor KM2 and a third contactor KM3 and a direct current speed regulation module 105, a coil of the first contactor KM1, a normally closed contact of the second contactor KM2 and a normally open contact of a first relay KA1 are connected in series to form a first branch, a coil of the second contactor KM2, a normally closed contact of the first contactor KM1 and a normally open contact of the second relay KA2 are connected in series to form a second branch, a coil of the third contactor KM3 and a normally open contact of a fifth relay KA5 are connected in series to form a third branch, and the three branches are connected in parallel. 24V alternating current supplies power for lighting lamp HL1, and lighting lamp HL1 is connected with switch K1 in series.

The direct current speed regulating module 105 realizes continuous regulation of armature voltage of the direct current motor FM-12, realizes stepless speed regulation of the welding turntable, and is matched with the first contactor KM1 and the second contactor KM2 to realize positive and negative rotation and energy consumption braking of the welding turntable. Optionally, the dc throttle module 105 includes a dc governor KBLC-240D, and for example, fig. 2 shows a schematic of the dc governor KBLC-240D, the dc governor KBLC-240D being operable with 115V and 230V ac and providing 0-90V and 0-180V dc outputs for achieving over 2% static differential in a 50:1 throttle range. The transient overvoltage protection of a piezoresistor is adopted, the transient overvoltage protection has good load and line voltage feedback regulation and improves the static difference rate, an electronic current limiting Circuit (CL) is used for protecting a motor and controlling the maximum value of overload output current, soft start (0.5-4 second regulation) can enable the direct current motor to be started stably, and when a forbidden circuit (terminals I1 and I2) is switched on, the output voltage of an armature is reduced to zero, and the motor is forbidden to rotate. A + and A-terminals of the direct current speed regulator KBLC-240D are connected with the direct current motor module 103, F + and F-terminals of the direct current speed regulator KBLC-240D are connected with an excitation coil inside the direct current motor FM-12, I1 and I2 terminals of the direct current speed regulator KBLC-240D are connected with a third relay SJ1 to realize soft start, an L1 terminal of the direct current speed regulator KBLC-240D is connected with 110V alternating current, an L2 terminal is connected with a 0V terminal of a transformer, and P1, P2 and P3 terminals of the direct current speed regulator KBLC-240D are connected with the box-type modulation module 108.

The programmable control module 106 is used for realizing logic control of the argon arc welding machine module 107, and the logic control at least comprises logic interlocking, time delay, counting, mode selection, welding and motor rotation.

Optionally, the programmable control module 106 includes an ohm dragon programmable controller CPM 1A.

Referring to table 1 in conjunction, there is shown an input point address look-up table for the ohm dragon programmable controller CPM 1A.

TABLE 1

Referring to table 2 in conjunction, there is shown an output point address look-up table for the ohm dragon programmable controller CPM 1A.

TABLE 2

Name (R)	(Code)	PLC output address	Wiring line number
				Positive rotation (Relay)	KA1	10.00	63
Reverse rotation (Relay)	KA2	10.01	64
				Soft start (time relay)	SJ1	10.02	65
Welding (Relay)	KA4	10.03	66
				Power supply (Relay)	KA5	10.04	67
Power indicator (indicator lamp)	HL2	10.05	68

The box adjusting and box adjusting module 108 comprises a box adjusting and button switch K2, a box adjusting potentiometer RP2 (on an electrical box panel), and a box adjusting potentiometer RP3 (on an operation box panel), wherein when the box adjusting and button switch K2 is in a box adjusting position, the rotating speed of the welding rotary table is adjusted through the box adjusting potentiometer RP2, and when the box adjusting and button switch K2 is in a box adjusting position, the rotating speed of the welding rotary table is adjusted through the box adjusting potentiometer RP 3.

The photoelectric control module 109 includes a first photosensor OP1 and a second photosensor OP2, the first photosensor OP1 is used for implementing origin detection, and the second photosensor OP2 is used for implementing seam detection. The first photosensor OP1 and the second photosensor OP2 are photo interrupters, also called penetration type photosensors, and the light emitting element and the light receiving element are arranged face to face and are disposed in the same package, and the detection function is realized by using the principle that the detection object is shielded from light when passing through. The light emitting component adopts an infrared light emitting diode, and the light receiving component adopts a phototriode.

The switching power supply module 110 includes a first switching power supply AC/DC1 and a second switching power supply AC/DC 2; the input of the first switching power supply AC/DC1 is 220V alternating current, and the output is 12V direct current, and the first switching power supply AC/DC1 is used for supplying power to the photoelectric control module 109; the second switching power supply AC/DC2 has an input of 220V AC and an output of 24V DC for supplying power to the output circuit of the programmable control module 106.

The argon arc welding machine module 107 adopts an IA-3001TP welding machine, the maximum welding current is 300A, the machine has the functions of argon conveying, high-frequency arc striking, maintaining current regulation, welding current regulation, spot welding time regulation, pulse current regulation, welding current attenuation and the like, and is used for argon arc welding (TIG welding) of workpieces.

The automatic argon arc welding machine provided by combining the figure 1 has the working principle that:

1. a power supply connection button SB1 is pressed, a PLC input point is connected with 0.00, an output point is connected with 10.04 in an attracting mode, an auxiliary contact is locked with 10.04 in a self-locking mode, a fifth relay KA5 is connected with the PLC input point in an attracting mode, a third contactor KM3 is connected with the PLC input point in an attracting mode, and an IA-3001TP welding machine obtains 380V voltage.

2. And when a power supply disconnection button SB2 is pressed, the PLC input point is disconnected at 0.02, the output point is released at 10.04, the fifth relay KA5 is released, the third contactor KM3 is released, and the IA-3001TP welding machine has no power supply.

3. When the IA-3001TP welding machine obtains 380V power supply, the output point 10.04 is attracted, at the same time the output point 10.05 is attracted, and the power supply indicator lamp HL2 is lighted.

4. When the welding rotary table is in a spot welding mode (the welding mode knob SA2 is in a neutral position), the internal coil 200.02 is attracted, the forward rotation button SB3 is pressed, the input point is 0.04 connected, the internal coil 200.04 is attracted, the output point is 10.00 attracted, the first relay KA1 is attracted, the first contactor KM1 is attracted, the direct current motor FM-12 rotates forward, and the welding rotary table rotates forward. When a reverse button SB4 is pressed, an input point is connected with 0.06, an internal coil is attracted by 200.05, an output point is attracted by 10.01, a second relay KA2 is attracted, a second contactor KM2 is attracted, a direct current motor FM-12 is reversed, and a welding rotary table is reversed. When the forward rotation button SB3 or the reverse rotation button SB4 is released, the motor is immediately stopped, and the button is in a inching state.

5. When the spot welding machine is in a spot welding mode (the welding mode knob SA2 is in a neutral position), the starting button SB5 is pressed, the PLC input point is connected with 0.09, the output point is connected with 10.03 in an attraction mode, the fourth relay KA4 is connected in an attraction mode, the normally open contact of the fourth relay KA4 is connected with lines (line numbers 10 and 11), and the IA-3001TP welding machine carries out spot welding.

6. When the foot switch K3 is stepped down, the PLC input point is 0.07 connected, the output point is 10.03 sucked, the fourth relay KA4 is sucked, the normally open contact of the fourth relay KA4 is closed (line numbers 10 and 11), and the IA-3001TP welding machine performs spot welding. The foot switch K3 and the start button SB5 are functionally identical, and only operate differently.

7. Adjusting a welding knob SA1 to rotate to an adjusting mode, forbidding welding of the automatic argon arc welding machine at the moment, attracting an inner coil 200.03, connecting an auxiliary contact 200.03, pressing a forward rotation button SB3, connecting a PLC input point 0.04, attracting an inner coil 200.13, connecting an auxiliary contact 200.13, attracting an output point 10.00, attracting a first relay KA1, attracting a first contactor KM1, positively rotating a direct current motor FM-12 and positively rotating a welding rotary table. When a reverse button SB4 is pressed, an input point is connected with 0.06, an internal coil is attracted by 200.14, an output point is attracted by 10.01, a relay KA2 is attracted, a contactor KM2 is attracted, a direct current motor FM-12 reverses, and a welding rotary table reverses. In the adjustment mode, the forward rotation button SB3 and the reverse rotation button SB4 are only clicked.

8. In the adjusting mode, a starting button SB5 is pressed, the welding rotary table rotates forwards and fully, and when the joint photoelectric controller KA7 acts, the welding rotary table automatically rotates backwards and stops after returning to the original point.

9. And the welding mode knob SA2 is rotated to a girth welding mode, the start button SB5 is pressed, the welding rotary table rotates forwards, the welding machine performs welding at the same time, the current is automatically attenuated when the seam photoelectric controller KA7 acts, the welding is completed, and then the welding rotary table rotates backwards and stops at the original point.

10. The welding mode knob SA2 is turned to repair welding mode, the welding rotary table can be stopped at any position by pressing the forward rotation button SB3 and the reverse rotation button SB4, the welding rotary table rotates forwards by pressing the start button SB5, the welding machine performs welding at the same time, the current is automatically attenuated by pressing the stop button SB6, the welding is completed, and the welding rotary table stops.

In summary, the automatic argon arc welding machine provided in this embodiment can be used for girth welding of thin-wall stainless steel parts by an automatic argon arc welding machine composed of an operation module, a relay module, a direct current motor module, a transformer module, a direct current speed regulation module, a programmable control module, an argon arc welding machine module, a box regulation module, a photoelectric control module and a switching power supply module, does not need a welding wire during welding, and is welded together by heating and melting argon arc welding, so that the welding line is smooth, attractive, good in sealing performance, reliable in welding quality, low in failure rate and convenient to operate, and can be used for a long time. The operation input signal is connected to the input end of the programmable control module, the interior is photoelectrically isolated, the anti-interference capability is strong, the output is controlled by the relay module, and the welding rotary table adopts soft start to eliminate the shaking phenomenon during start.

In addition, the automatic argon arc welding machine is composed of a programmable controller, a direct current motor speed regulator, a photoelectric controller, a welding rotary table, a welding gun fixing and adjusting frame and the like, and four working modes of girth welding, repair welding, spot welding and adjustment can be realized.

In addition, the automatic argon arc welding machine has the function of preventing the welding rotary table from rotating for a short time to make misoperation when the power supply of the equipment is just switched on, and has the function of dynamic braking when the welding rotary table stops, so that the rotary table can be quickly stopped.

In addition, in the girth welding mode, the length of the seam is adjusted by adjusting the angle of the second photoelectric sensor baffle sheet; the rotating speed of the welding rotary table can be adjusted through a box potentiometer or a box potentiometer; the fixed adjusting frame of the welding gun is adjusted, so that the welding gun can move in three dimensions, the tungsten electrode of the welding gun is aligned to a welding line, and the proper argon arc discharge distance is kept. The welding rotary table can be used for both horizontal and vertical purposes and is used for welding seams at different positions.

In addition, when in a girth welding mode, the argon feeding, the high-frequency arc striking, the current soft starting (rising time), the welding, the workpiece rotation, the seam welding, the current attenuation ending, the argon maintenance protection and the automatic returning of the reversing table to the original point after the welding is finished can be automatically finished by pressing a starting button, and the whole welding process is finished.

In addition, in the spot welding mode, the workpiece is fixed and positioned (only a single welding spot is formed), and the rotary table can rotate in a forward and backward inching manner.

In addition, in the repair welding mode, the repair welding device is used for repairing welding of a weldment with a defect or welding a section of welding line, the weldment can be welded at any position, and the welding is finished at any position.

In addition, in the mode of adjustment, welding can not be carried out, and the welding part is used for adjusting and fixing the welding part on the rotary table, for example, the welding part is clamped and fixed firmly, the welding part is prevented from being eccentric, inclined and the like, and the length of a joint is adjusted.

The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying a number of the indicated technical features. Thus, a defined feature of "first", "second", may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An automatic argon arc welding machine is characterized by comprising: the device comprises an operation module, a relay module, a direct current motor module, a transformer module, a direct current speed regulation module, a programmable control module, an argon arc welding machine module, a box regulation and box regulation module, a photoelectric control module and a switching power supply module;

the operation module is connected with an input point of the programmable control module, the programmable control module is used for realizing the logic control of the argon arc welding machine module, and the operation module is used for providing an operation button; the relay module is connected with an output point of the programmable control module and is used for working under the control of the programmable control module; the direct current motor module and the box adjusting module are respectively connected with the direct current speed regulating module, the direct current motor module is used for driving the welding rotary table to rotate, the box adjusting module is used for regulating the rotating speed of the welding rotary table, and the direct current speed regulating module is used for regulating the armature voltage of the direct current motor to realize stepless speed regulation of the welding rotary table; the input of the transformer module is connected with a three-phase power supply and is used for converting the three-phase power supply into different alternating-current voltages for supplying power; the argon arc welding machine module is connected with a three-phase power supply and is used for welding a workpiece; the photoelectric control module is connected with an input point of the programmable control module and is used for realizing origin detection and seam detection; the switch power supply module is respectively connected with the photoelectric control module and the programmable control module and used for supplying power to the photoelectric control module and the programmable control module;

the operation module comprises a power on button, a power off button, a forward rotation button, a reverse rotation button, an adjusting and welding knob, a welding mode knob, a foot switch, a start button and a stop button;

the stop button controls the argon arc welding machine module to stop welding when the girth welding state or the repair welding state is pressed;

the working principle of the automatic argon arc welding machine is as follows:

pressing a power supply connection button SB1, connecting a PLC input point of 0.00, attracting an output point of 10.04, self-locking an auxiliary contact of 10.04, attracting a fifth relay KA5, attracting a third contactor KM3, and obtaining 380V voltage by an IA-3001TP welding machine;

the power supply disconnection button SB2 is pressed, the PLC input point is disconnected at 0.02, the output point is released at 10.04, the fifth relay KA5 is released, the third contactor KM3 is released, and the IA-3001TP welding machine has no power supply;

when the IA-3001TP welding machine obtains a 380V power supply, the output point is attracted by 10.04, meanwhile, the output point is attracted by 10.05, and a power supply indicator lamp HL2 is lightened;

when the welding rotary table is in a spot welding mode, the welding mode knob SA2 is in a neutral position, the internal coil 200.02 is attracted, the forward rotation button SB3 is pressed, the input point is 0.04 to be connected, the internal coil 200.04 is attracted, the output point is 10.00 to be attracted, the first relay KA1 is attracted, the first contactor KM1 is attracted, the direct current motor FM-12 rotates forwards, and the welding rotary table rotates forwards; pressing a reverse button SB4, connecting an input point 0.06, attracting an internal coil 200.05, attracting an output point 10.01, attracting a second relay KA2, attracting a second contactor KM2, reversing a direct current motor FM-12, and reversing a welding rotary table; when the forward rotation button SB3 or the reverse rotation button SB4 is released, the motor stops rotating immediately, and the button is in a inching state;

when the spot welding machine is in a spot welding mode, the welding mode knob SA2 is in a neutral position, the starting button SB5 is pressed, the PLC input point is connected with 0.09, the output point is attracted by 10.03, the fourth relay KA4 is attracted, the normally open contact of the fourth relay KA4 is connected, and the IA-3001TP welding machine performs spot welding;

stepping on a foot switch K3, connecting a PLC input point 0.07, sucking an output point 10.03, sucking a fourth relay KA4, closing a normally open contact of a fourth relay KA4, and performing spot welding by an IA-3001TP welding machine; the stepping switch K3 has the same function as pressing the start button SB5, and only the operation mode is different;

adjusting a welding knob SA1 to rotate to an adjusting mode, prohibiting welding by an automatic argon arc welding machine at the moment, attracting an inner coil 200.03, connecting an auxiliary contact 200.03, pressing a forward rotation button SB3, connecting a PLC input point 0.04, attracting an inner coil 200.13, connecting an auxiliary contact 200.13, attracting an output point 10.00, attracting a first relay KA1, attracting a first contactor KM1, rotating a direct current motor FM-12 forward, and rotating a welding turntable forward; pressing a reverse button SB4, connecting an input point 0.06, attracting an internal coil 200.14, attracting an output point 10.01, attracting a relay KA2, attracting a contactor KM2, reversing a direct current motor FM-12, and reversing a welding rotary table; in the adjustment mode, the forward button SB3 and the reverse button SB4 can only be clicked;

in the adjustment mode, a start button SB5 is pressed, the welding rotary table rotates forwards and fully rotates for a circle, and when the joint photoelectric controller KA7 acts, the welding rotary table automatically rotates backwards and stops after returning to the original point;

the welding mode knob SA2 is rotated to a girth welding mode, the start button SB5 is pressed, the welding rotary table rotates forwards, the welding machine performs welding at the same time, current is automatically attenuated when the seam photoelectric controller KA7 acts, welding is completed, then the welding rotary table rotates reversely, and the welding rotary table stops when reaching the original point;

the welding mode knob SA2 is turned to repair welding mode, the welding rotary table can be stopped at any position by pressing the forward rotation button SB3 and the reverse rotation button SB4, the welding rotary table rotates forwards by pressing the start button SB5, the welding machine performs welding at the same time, the current is automatically attenuated by pressing the stop button SB6, the welding is completed, and the welding rotary table stops.

2. The automatic argon arc welding machine according to claim 1, wherein the relay module comprises a first relay, a second relay, a first contactor, a second contactor, a third relay, a fourth relay, a fifth relay and a power indicator;

3. The automatic argon arc welding machine according to claim 2, wherein the direct current motor module comprises a direct current motor and a brake resistor, the direct current motor is used for driving the welding turntable to rotate, an excitation coil with excitation voltage of direct current of 100V is arranged in the direct current motor, and the brake resistor is used for energy consumption braking of the direct current motor to stop the welding turntable;