CN112620880A - Circuit structure of double-channel short-period arc stud welding machine - Google Patents
Circuit structure of double-channel short-period arc stud welding machine Download PDFInfo
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- CN112620880A CN112620880A CN202011398947.4A CN202011398947A CN112620880A CN 112620880 A CN112620880 A CN 112620880A CN 202011398947 A CN202011398947 A CN 202011398947A CN 112620880 A CN112620880 A CN 112620880A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/20—Stud welding
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Abstract
The invention discloses a circuit structure of a two-channel short-period arc stud welding machine, which comprises a three-phase power supply alternating current circuit, a main transformer T1, a power transmission alternating current circuit, a three-phase full-bridge rectification circuit, a power transmission direct current circuit and a welding machine circuit, wherein the main transformer T1 is correspondingly arranged between the three-phase power supply alternating current circuit and the power transmission alternating current circuit, the three-phase full-bridge rectification circuit and the power transmission direct current circuit are sequentially connected; the welding machine circuit comprises a welding machine grounding clamp circuit and a double-channel welding gun output circuit, the welding machine grounding clamp circuit and the double-channel welding gun output circuit are respectively connected with a power transmission direct-current circuit, the double-channel welding gun output circuit comprises a first channel welding gun output circuit and a second channel welding gun output circuit, and a thyristor Q1 is connected between the double-channel welding gun output circuit and the power transmission direct-current circuit. The invention provides a circuit structure of a double-channel short-period arc stud welding machine, which adopts the output control of a double-channel welding circuit and can be quickly suitable for the welding requirements and parameter adjustment.
Description
Technical Field
The invention relates to the technical field of stud welding machines, in particular to a circuit structure of a double-channel short-period arc stud welding machine.
Background
The arc stud welding is a high-efficiency and high-quality stud welding method, a welding power supply, a circuit structure and an arc stud welding gun are necessary for a complete arc stud welding system, the circuit structure is the most important and most critical control circuit of the arc stud welding machine, the circuit structure plays a role in adjusting part of welding parameters and completing the welding process, is a key factor influencing the performance of the welding gun and has great influence on the welding quality. The welding time of the existing arc stud welding machine is usually more than 100 milliseconds, and a ceramic ring or an inert gas protection molten pool is needed in the welding process; the existing arc stud welding machine is generally in single-channel output, has larger impact current to a power grid and heavy harmonic, and can cause the resonance of the power grid when being used in a centralized way. With the development of society and the progress of welding technology, the demand on the automation degree of welding is increasingly improved, so that higher requirements are provided for the control precision of the welding process, and therefore, the real-time control and adjustment of the welding process are ensured in order to improve the welding efficiency and the welding quality.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a circuit structure of a double-channel short-period arc stud welding machine, which can realize the output of a double-channel welding circuit so as to meet the field welding requirements of studs with different specifications and corresponding to different parameters, and in the using process, a welding gun chuck and adjusting parameters do not need to be frequently replaced, and the two channels have independent parameters, are time-sharing multiplexed and are independently controlled.
The purpose of the invention is realized by the following technical scheme:
a circuit structure of a two-channel short-period arc stud welding machine comprises a three-phase power supply alternating current circuit, a main transformer T1, a power transmission alternating current circuit, a three-phase full-bridge rectification circuit, a power transmission direct current circuit and a welding machine circuit, wherein an air switch S1 is installed on the three-phase power supply alternating current circuit, the main transformer T1 is correspondingly arranged between the three-phase power supply alternating current circuit and the power transmission alternating current circuit, the three-phase full-bridge rectification circuit and the power transmission direct current circuit are sequentially connected; the welding machine circuit comprises a welding machine grounding clamp circuit and a double-channel welding gun output circuit, the welding machine grounding clamp circuit and the double-channel welding gun output circuit are respectively connected with a power transmission direct current circuit, and the welding machine grounding clamp circuit is connected with a high-voltage ceramic chip capacitor C1; the dual-channel welding gun output circuit comprises a first channel welding gun output circuit and a second channel welding gun output circuit, a thyristor Q1 is connected between the dual-channel welding gun output circuit and the power transmission direct-current circuit, an enamel resistor R4 is connected in parallel on the thyristor Q1, a thyristor Q2 and a high-voltage ceramic chip capacitor C2 are connected on the first channel welding gun output circuit, and a thyristor Q3 and a high-voltage ceramic chip capacitor C3 are connected on the second channel welding gun output circuit.
In order to better realize the invention, a solid-state relay K1 and a solid-state relay K2 are further connected between the high-voltage winding side of the main transformer T1 and a three-phase power supply alternating current circuit, a piezoresistor R1 is correspondingly connected to the solid-state relay K1, a piezoresistor R2 is correspondingly connected to the solid-state relay K2, a gear switch S2 is arranged on the high-voltage winding side of the main transformer T1, and the power transmission alternating current circuit is connected to the low-voltage winding side of the main transformer T1; an air valve K3 is correspondingly arranged on the first channel welding gun output circuit, and an air valve K4 is correspondingly arranged on the second channel welding gun output circuit.
The further technical scheme is as follows: the three-phase full-bridge rectifier circuit comprises a rectifying half-bridge module D1, a rectifying half-bridge module D2 and a rectifying half-bridge module D3, and the three-phase full-bridge rectifier circuit is correspondingly connected with a piezoresistor R3.
The further technical scheme is as follows: the invention also comprises a control circuit board which is respectively and electrically connected with the solid-state relay K1, the solid-state relay K2, the thyristor Q1, the thyristor Q2, the thyristor Q3, the air valve K3 and the air valve K4.
The further technical scheme is as follows: the transformer T1 is internally provided with an auxiliary winding connected with a control circuit board, the main transformer T1 is internally provided with a 105-DEG C normally-open temperature relay, and the auxiliary winding and the temperature relay are respectively connected with the control circuit board.
Preferably, the three-phase power supply alternating current circuit further comprises a control transformer T2, the three-phase power supply alternating current circuit is further sequentially connected with an axial flow fan B1 and a filter F1, the filter F1 is correspondingly connected with the high-voltage winding side of the control transformer T2, the low-voltage winding side of the control transformer T2 outputs an alternating current 60V functional circuit, an alternating current 18V functional circuit and an alternating current 8V functional circuit, and the alternating current 60V functional circuit, the alternating current 18V functional circuit and the alternating current 8V functional circuit are respectively connected with the control circuit board.
Preferably, a four-core aviation plug J1 and a four-core aviation plug J2 are connected to the control circuit board.
Preferably, the primary tap of the main transformer T1 is delta-connected, and the secondary tap of the main transformer T1 is star-connected.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the invention provides a circuit structure of a double-channel short-period arc stud welding machine, which can realize the output of a double-channel welding circuit so as to meet the field welding requirements of studs with different specifications and corresponding to different parameters.
(2) The invention can realize welding on the thin steel plate, adopts a high-power narrow melting zone welding method, and utilizes the explosion effect of electric arc to protect a molten pool, thereby greatly improving the welding strength, the welding quality and the welding efficiency; meanwhile, the welding time of the invention is extremely short, the air is discharged immediately after the electric arc explosion, and the welding is finished when the external air is not immersed into the molten pool, so that a ceramic ring or protective gas is not needed.
(3) The invention has the advantages of no harmonic pollution to the power grid, simple circuit structure and good reliability.
Drawings
FIG. 1 is a circuit diagram of the present invention;
fig. 2 is a block diagram of a circuit structure inside the control circuit board according to the third embodiment of the present invention;
FIG. 3 is a timing diagram of the welding control of the arc stud welder of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
example one
As shown in fig. 1, a circuit structure of a dual-channel short-period arc stud welding machine includes a three-phase power supply ac circuit, a main transformer T1, a power transmission ac circuit, a three-phase full-bridge rectification circuit, a power transmission dc circuit and a welding machine circuit, wherein an air switch S1 is installed on the three-phase power supply ac circuit, the main transformer T1 is correspondingly arranged between the three-phase power supply ac circuit and the power transmission ac circuit, the three-phase power supply ac circuit is correspondingly connected to a high-voltage winding side of the main transformer T1, and the power transmission ac circuit is correspondingly connected to a low-voltage winding side of the main transformer T1. The power transmission alternating current circuit, the three-phase full-bridge rectification circuit and the power transmission direct current circuit are sequentially connected. The three-phase full-bridge rectifier circuit of the embodiment comprises a rectifying half-bridge module D1, a rectifying half-bridge module D2 and a rectifying half-bridge module D3, and the three-phase full-bridge rectifier circuit is correspondingly connected with a piezoresistor R3. The welding machine circuit comprises a welding machine grounding clamp circuit and a double-channel welding gun output circuit, the welding machine grounding clamp circuit and the double-channel welding gun output circuit are respectively connected with a power transmission direct current circuit, and the welding machine grounding clamp circuit is connected with a high-voltage ceramic chip capacitor C1; the dual-channel welding gun output circuit comprises a first channel welding gun output circuit and a second channel welding gun output circuit, a thyristor Q1 is connected between the dual-channel welding gun output circuit and the power transmission direct-current circuit, an enamel resistor R4 is connected in parallel on the thyristor Q1, a thyristor Q2 and a high-voltage ceramic chip capacitor C2 are connected on the first channel welding gun output circuit, and a thyristor Q3 and a high-voltage ceramic chip capacitor C3 are connected on the second channel welding gun output circuit.
A solid-state relay K1 and a solid-state relay K2 are further connected between the high-voltage winding side of the main transformer T1 and the three-phase power supply alternating current circuit, a voltage dependent resistor R1 is correspondingly connected to the solid-state relay K1, a voltage dependent resistor R2 is correspondingly connected to the solid-state relay K2, a gear switch S2 is arranged on the high-voltage winding side of the main transformer T1, and the power transmission alternating current circuit is connected to the low-voltage winding side of the main transformer T1; an air valve K3 is correspondingly arranged on the first channel welding gun output circuit, and an air valve K4 is correspondingly arranged on the second channel welding gun output circuit.
According to the circuit diagram shown in fig. 1, the circuit related to the present embodiment is connected, the air switch S1 controls the switch of the whole machine, after the three-phase 380V/50Hz alternating current (i.e. the three-phase power supply alternating current circuit) passes through the air switch S1, two phases of the three-phase 380V/50Hz alternating current are switched on and off through the solid-state relay K1 and the solid-state relay K2 to control the primary input of the main transformer T1, and the voltage dependent resistor R1 and the voltage dependent resistor R2 respectively serve to protect the solid-state relay K1 and the solid-. The gear switch S2 is a two-gear three-phase linked switch, and different primary taps of the main transformer T1 can be changed to access the grid by adjusting the gear of the gear switch S2, so as to achieve the purpose of adjusting the secondary output voltage. Main transformer T1 mainly plays the effect of step-down isolation, the primary tap is "triangle" and connects, the secondary tap is "star" and connects, be provided with auxiliary winding at main transformer T1, auxiliary winding is synchronous signal, mainly provide the control panel, so that open solid-state relay K1 and solid-state relay K2 at the zero crossing point, prevent to produce harmonic interference electric wire netting, at main transformer T1 internally mounted have 105 degrees centigrade to normally open temperature relay, play the effect of protection main transformer T1. The three rectifying half-bridge modules D1, D2 and D3 form a three-phase full-bridge rectifying circuit, three-phase alternating current which is isolated by the main transformer T1 and is subjected to voltage reduction is rectified into direct current, and the piezoresistor R3 plays a role in protecting the rectifying bridge. The positive end of the three-phase full-bridge rectification circuit is directly output to a welding machine grounding clamp circuit of a welding machine circuit, the negative end of the three-phase full-bridge rectification circuit is output to a double-channel welding gun output circuit through an enamel resistor R4 and a thyristor Q1 which are connected in parallel, then is output to the welding gun output circuit of two channels through a thyristor Q2 and a thyristor Q3 which are connected in parallel, the enamel resistor R4 plays a role in limiting the current in the welding arcing stage and limits the arcing current to be within 100A, the thyristor Q1 plays a role in bypassing the enamel resistor R4 and short-circuits the enamel resistor R4 in the welding main arc stage. The purpose of controlling the access of different channels is achieved by controlling the on-off of the thyristor Q2 and the thyristor Q3. The gas valve K3 and the gas valve K4 play a role in controlling the on-off of the protective gas on the welding gun. The high-voltage ceramic chip capacitor C1, the high-voltage ceramic chip capacitor C2 and the high-voltage ceramic chip capacitor C3 are used for high-frequency filtering.
Example two
Compared with the first embodiment, the control circuit board is added, and the solid-state relay K1, the solid-state relay K2, the thyristor Q1, the thyristor Q2, the thyristor Q3, the air valve K3 and the air valve K4 are subjected to circuit control through the control circuit board. Compared with the first embodiment, the present embodiment adds the following technical solutions:
the embodiment also comprises a control circuit board which is respectively and electrically connected with the solid-state relay K1, the solid-state relay K2, the thyristor Q1, the thyristor Q2, the thyristor Q3, the air valve K3 and the air valve K4. The main transformer T1 of this embodiment has the auxiliary winding that is connected with control circuit board inside, main transformer T1 is inside still to be installed 105 degrees centigrade and normally open temperature relay, and auxiliary winding, temperature relay are connected with control circuit board respectively. The control circuit board of the embodiment is connected with a four-core aviation plug J1 and a four-core aviation plug J2.
EXAMPLE III
As shown in fig. 1 to 3, a circuit structure of a two-channel short-period arc stud welding machine includes a three-phase power supply ac circuit, a main transformer T1, a power transmission ac circuit, a three-phase full-bridge rectification circuit, a power transmission dc circuit and a welding machine circuit, wherein an air switch S1 is installed on the three-phase power supply ac circuit, the main transformer T1 is correspondingly arranged between the three-phase power supply ac circuit and the power transmission ac circuit, the three-phase full-bridge rectification circuit and the power transmission dc circuit are sequentially connected; the welding machine circuit comprises a welding machine grounding clamp circuit and a double-channel welding gun output circuit, the welding machine grounding clamp circuit and the double-channel welding gun output circuit are respectively connected with a power transmission direct current circuit, and the welding machine grounding clamp circuit is connected with a high-voltage ceramic chip capacitor C1; the dual-channel welding gun output circuit comprises a first channel welding gun output circuit and a second channel welding gun output circuit, a thyristor Q1 is connected between the dual-channel welding gun output circuit and the power transmission direct-current circuit, an enamel resistor R4 is connected in parallel on the thyristor Q1, a thyristor Q2 and a high-voltage ceramic chip capacitor C2 are connected on the first channel welding gun output circuit, and a thyristor Q3 and a high-voltage ceramic chip capacitor C3 are connected on the second channel welding gun output circuit.
As shown in fig. 1, a solid-state relay K1 and a solid-state relay K2 are further connected between the high-voltage winding side of the main transformer T1 and the three-phase power supply ac circuit of the present embodiment, a voltage dependent resistor R1 is correspondingly connected to the solid-state relay K1, a voltage dependent resistor R2 is correspondingly connected to the solid-state relay K2, a gear switch S2 is arranged on the high-voltage winding side of the main transformer T1, and the power transmission ac circuit is connected to the low-voltage winding side of the main transformer T1; an air valve K3 is correspondingly arranged on the first channel welding gun output circuit, and an air valve K4 is correspondingly arranged on the second channel welding gun output circuit.
The three-phase full-bridge rectifier circuit of this embodiment includes rectification half-bridge module D1, rectification half-bridge module D2, rectification half-bridge module D3, the last correspondence of three-phase full-bridge rectifier circuit is connected with piezo-resistor R3.
The embodiment also comprises a control circuit board which is respectively and electrically connected with the solid-state relay K1, the solid-state relay K2, the thyristor Q1, the thyristor Q2, the thyristor Q3, the air valve K3 and the air valve K4. The control circuit board of the embodiment is connected with a four-core aviation plug J1 and a four-core aviation plug J2.
The main transformer T1 of this embodiment has the auxiliary winding that is connected with control circuit board inside, 105 degrees centigrade normally open temperature relay is still installed to main transformer T1 inside, and auxiliary winding, temperature relay are connected with control circuit board respectively. The three-phase power supply alternating current circuit further comprises a control transformer T2, the three-phase power supply alternating current circuit is further sequentially connected with an axial flow fan B1 and a filter F1, the filter F1 is correspondingly connected with the high-voltage winding side of the control transformer T2, the low-voltage winding side of the control transformer T2 outputs an alternating current 60V functional circuit, an alternating current 18V functional circuit and an alternating current 8V functional circuit, and the alternating current 60V functional circuit, the alternating current 18V functional circuit and the alternating current 8V functional circuit are respectively connected with the control circuit board. The primary tap of the main transformer T1 adopts a delta connection, and the secondary tap of the main transformer T1 adopts a star connection.
The circuit is connected according to the circuit diagram shown in fig. 1, the air switch S1 controls the switch of the whole machine, after the three-phase 380V/50Hz alternating current (namely, the three-phase power supply alternating current circuit) passes through the air switch S1, two phases of the three-phase 380V/50Hz alternating current are switched on and off through the solid-state relay K1 and the solid-state relay K2 to control the primary input of the main transformer T1, and the piezoresistor R1 and the piezoresistor R2 respectively play roles in protecting the solid-state relay K1 and the solid-state relay K2. The gear switch S2 is a two-gear three-phase linked switch, and different primary taps of the main transformer T1 can be changed to access the grid by adjusting the gear of the gear switch S2, so as to achieve the purpose of adjusting the secondary output voltage. Main transformer T1 mainly plays the effect of step-down isolation, the primary tap is "triangle" and connects, the secondary tap is "star" and connects, be provided with auxiliary winding at main transformer T1, auxiliary winding is synchronous signal, mainly provide the control panel, so that open solid-state relay K1 and solid-state relay K2 at the zero crossing point, prevent to produce harmonic interference electric wire netting, at main transformer T1 internally mounted have 105 degrees centigrade to normally open temperature relay, play the effect of protection main transformer T1. The three rectifying half-bridge modules D1, D2 and D3 form a three-phase full-bridge rectifying circuit, three-phase alternating current which is isolated by the main transformer T1 and is subjected to voltage reduction is rectified into direct current, and the piezoresistor R3 plays a role in protecting the rectifying bridge. The positive end of the three-phase full-bridge rectification circuit is directly output to a welding machine grounding clamp circuit of a welding machine circuit, the negative end of the three-phase full-bridge rectification circuit is output to a double-channel welding gun output circuit through an enamel resistor R4 and a thyristor Q1 which are connected in parallel, then is output to the welding gun output circuit of two channels through a thyristor Q2 and a thyristor Q3 which are connected in parallel, the enamel resistor R4 plays a role in limiting the current in the welding arcing stage and limits the arcing current to be within 100A, the thyristor Q1 plays a role in bypassing the enamel resistor R4 and short-circuits the enamel resistor R4 in the welding main arc stage. The purpose of controlling the access of different channels is achieved by controlling the on-off of the thyristor Q2 and the thyristor Q3. The gas valve K3 and the gas valve K4 play a role in controlling the on-off of the protective gas on the welding gun. The high-voltage ceramic chip capacitor C1, the high-voltage ceramic chip capacitor C2 and the high-voltage ceramic chip capacitor C3 are used for high-frequency filtering. The axial flow fan B1 is used for forcibly blowing air inside the welding machine and plays a role in forcibly dissipating heat inside the welding machine. The filter F1 is used for filtering high-frequency harmonic waves in the power grid and preventing the high-frequency harmonic waves from influencing the control circuit; the control transformer T2 is isolated for voltage reduction, windings with different voltage grades respectively provide energy for different functional circuits on the control board, and the embodiment respectively reduces the voltage and outputs an alternating current 60V functional circuit, an alternating current 18V functional circuit and an alternating current 8V functional circuit to the control circuit board; the four-core aviation plug J1 and the four-core aviation plug J2 are connected to the output panel of the welding machine and used for controlling the welding gun.
As shown in fig. 2, this embodiment provides a schematic block diagram of an internal circuit of a preferred control circuit board, where the internal circuit of the control circuit board includes a welding gun driving circuit unit a, a welding gun driving circuit unit B, a solid-state relay driving circuit unit, a contact detection circuit unit, a resistance bypass thyristor driving circuit unit, a channel selection thyristor driving circuit unit, a zero-cross detection circuit unit, a logic control circuit unit, an overheat protection circuit unit, a gas valve driving circuit unit a, and a gas valve driving circuit unit B, and the above circuit units of the control circuit board are driving circuit units for each component in fig. 1, and mainly perform circuit driving control on the corresponding component. The welding gun driving circuit unit A and the welding gun driving circuit unit B respectively drive welding guns (two welding guns can be used) of two channels. The solid-state relay drive circuit unit controls the output of the welding machine by controlling the on-off of two phase lines in the input of the main transformer. And the contact detection circuit unit judges whether the stud and the workpiece are in contact. The resistor bypass silicon controlled rectifier driving circuit unit, namely the driving thyristor Q1 is in short circuit with the enamel resistor R4, and the current of the transformer is directly output. The channel selection silicon controlled rectifier driving circuit unit, namely the driving thyristor Q2 and the driving thyristor Q3, triggers and conducts different thyristors according to the welding channel selection result. And the zero-crossing detection circuit unit detects the zero crossing point of one phase line in the power grid when welding output is needed, and opens the solid relay to prevent harmonic waves from being generated and polluting the power grid. And the logic control circuit unit is mainly used for controlling the circuit unit of which the whole welding time sequence occurs according to the preset value. And an overheat protection circuit unit for protecting the transformer from overheating. And the gas valve driving circuit unit A and the gas valve driving circuit unit B are selected according to actual channels, and the on-off of protective gas of a first channel (corresponding to a first channel welding gun output circuit) and a second channel (corresponding to a second channel welding gun output circuit) is controlled according to requirements during welding.
The welding control sequence of the present embodiment is shown in fig. 3, and the output current is a fitted curve of the actual output current. The control sequence flow is as follows: after a short-circuit signal indicating that a stud on a welding gun is in contact with a workpiece is detected, whether the welding gun is buckled is detected? Opening a channel corresponding to the welding gun after the welding gun is buckled, selectively opening a thyristor (such as a thyristor Q2 or a thyristor Q3) of the corresponding channel, opening a solid-state relay (specifically a solid-state relay K1 and a solid-state relay K2) on the rising edge of the next synchronous signal, outputting arc striking current smaller than 100A by the current of the welding machine through a current limiting resistor R4, electrifying a welding gun electromagnet coil after about 5-10 ms, pulling up a stud, igniting electric arcs, triggering a resistor bypass thyristor Q1 to be conducted after about 10-20 ms, short-circuiting a resistor R4, and directly adding the rectified direct current to two ends of an arc column after the direct current passes through a resistor bypass thyristor Q1 and a channel selection thyristor (such as a thyristor Q2 or a thyristor Q3). And (3) rapidly burning the main arc, after the burning time is equal to the preset time, dropping a welding gun coil, enabling the welding gun to fall, inserting the stud into the molten pool, and closing the solid-state relay (specifically the solid-state relay K1 and the solid-state relay K2), the resistor bypass thyristor Q1 and the channel selection thyristor (such as the thyristor Q2 or the thyristor Q3) after about 2-5 ms, so as to complete single welding.
Compared with a capacitance energy storage type stud welding machine and a long-period arc discharge type stud welding machine, the invention adopts a circuit structure of a double-channel short-period arc stud welding machine to form the arc discharge type stud welding machine, the depth of a welding molten pool of the arc discharge type stud welding machine is between the two, the welding molten pool can be welded on a thin steel plate, and the welding strength and the welding quality of the arc discharge type stud welding machine are far higher than those of the two stud welding machines. The invention can realize welding on the thin steel plate, adopts a high-power narrow melting zone welding method, protects a molten pool by using the 'explosion effect' of electric arc, discharges air immediately after the electric arc is exploded, finishes welding when external air is not immersed into the molten pool, does not need a ceramic ring or protective gas, has extremely short welding time, and is usually one tenth to one tenth of the welding time under the protection mode of the ceramic ring or the inert gas.
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 and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a binary channels short cycle arc stud welding machine circuit structure which characterized in that: the welding machine comprises a three-phase power supply alternating current circuit, a main transformer T1, a power transmission alternating current circuit, a three-phase full-bridge rectification circuit, a power transmission direct current circuit and a welding machine circuit, wherein an air switch S1 is arranged on the three-phase power supply alternating current circuit, the main transformer T1 is correspondingly arranged between the three-phase power supply alternating current circuit and the power transmission alternating current circuit, the three-phase full-bridge rectification circuit and the power transmission direct current circuit are sequentially connected; the welding machine circuit comprises a welding machine grounding clamp circuit and a double-channel welding gun output circuit, the welding machine grounding clamp circuit and the double-channel welding gun output circuit are respectively connected with a power transmission direct current circuit, and the welding machine grounding clamp circuit is connected with a high-voltage ceramic chip capacitor C1; the dual-channel welding gun output circuit comprises a first channel welding gun output circuit and a second channel welding gun output circuit, a thyristor Q1 is connected between the dual-channel welding gun output circuit and the power transmission direct-current circuit, an enamel resistor R4 is connected in parallel on the thyristor Q1, a thyristor Q2 and a high-voltage ceramic chip capacitor C2 are connected on the first channel welding gun output circuit, and a thyristor Q3 and a high-voltage ceramic chip capacitor C3 are connected on the second channel welding gun output circuit.
2. The circuit structure of a two-pass short-cycle arc stud welder according to claim 1, wherein: a solid-state relay K1 and a solid-state relay K2 are further connected between the high-voltage winding side of the main transformer T1 and the three-phase power supply alternating current circuit, a piezoresistor R1 is correspondingly connected to the solid-state relay K1, a piezoresistor R2 is correspondingly connected to the solid-state relay K2, a gear switch S2 is arranged on the high-voltage winding side of the main transformer T1, and the power transmission alternating current circuit is connected to the low-voltage winding side of the main transformer T1; an air valve K3 is correspondingly arranged on the first channel welding gun output circuit, and an air valve K4 is correspondingly arranged on the second channel welding gun output circuit.
3. The circuit structure of a two-pass short cycle arc stud welder according to claim 2, wherein: the three-phase full-bridge rectifier circuit comprises a rectifying half-bridge module D1, a rectifying half-bridge module D2 and a rectifying half-bridge module D3, and the three-phase full-bridge rectifier circuit is correspondingly connected with a piezoresistor R3.
4. The circuit structure of a two-pass short cycle arc stud welder according to claim 3, wherein: the device also comprises a control circuit board which is respectively and electrically connected with the solid-state relay K1, the solid-state relay K2, the thyristor Q1, the thyristor Q2, the thyristor Q3, the air valve K3 and the air valve K4.
5. The circuit structure of a two-pass short cycle arc stud welder according to claim 4, wherein: the transformer T1 is internally provided with an auxiliary winding connected with a control circuit board, the main transformer T1 is internally provided with a 105-DEG C normally-open temperature relay, and the auxiliary winding and the temperature relay are respectively connected with the control circuit board.
6. The circuit structure of a two-pass short-period arc stud welder according to claim 4 or 5, wherein: the three-phase power supply alternating current circuit is further provided with a control transformer T2, the three-phase power supply alternating current circuit is further sequentially connected with an axial flow fan B1 and a filter F1, the filter F1 is correspondingly connected with the high-voltage winding side of the control transformer T2, the low-voltage winding side of the control transformer T2 outputs an alternating current 60V functional circuit, an alternating current 18V functional circuit and an alternating current 8V functional circuit, and the alternating current 60V functional circuit, the alternating current 18V functional circuit and the alternating current 8V functional circuit are respectively connected with the control circuit board.
7. The circuit structure of a two-pass short cycle arc stud welder according to claim 6, wherein: the control circuit board is connected with a four-core aviation plug J1 and a four-core aviation plug J2.
8. The circuit structure of a two-pass short cycle arc stud welder according to claim 2, wherein: the primary tap of the main transformer T1 adopts a delta connection method, and the secondary tap of the main transformer T1 adopts a star connection method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011398947.4A CN112620880A (en) | 2020-12-04 | 2020-12-04 | Circuit structure of double-channel short-period arc stud welding machine |
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| CN202011398947.4A CN112620880A (en) | 2020-12-04 | 2020-12-04 | Circuit structure of double-channel short-period arc stud welding machine |
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| CN202011398947.4A Pending CN112620880A (en) | 2020-12-04 | 2020-12-04 | Circuit structure of double-channel short-period arc stud welding machine |
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| CN (1) | CN112620880A (en) |
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2020
- 2020-12-04 CN CN202011398947.4A patent/CN112620880A/en active Pending
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