CN210469137U

CN210469137U - Control circuit of welding bead processor

Info

Publication number: CN210469137U
Application number: CN201921338653.5U
Authority: CN
Inventors: 李从海
Original assignee: Shenzhen Huachuangmei Electric Appliance Co Ltd
Current assignee: Shenzhen Huachuangmei Electric Appliance Co Ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-05-05
Anticipated expiration: 2029-08-14

Abstract

The utility model discloses a control circuit of welding bead processor, including the alternating current input end, first rectifier module, contravariant module, second rectifier module and control module, insert first rectifier module through the alternating current input end, first rectifier module becomes the alternating current direct current transmission to contravariant module with the alternating current, contravariant module becomes the alternating current transmission of well high frequency to second rectifier module with the direct current, second rectifier module becomes the alternating current with the alternating current and exports behind the direct current, second rectifier module still is connected with feedback circuit, control module can adjust the voltage of second rectifier module output through feedback circuit, electric current or frequency. Commercial power AC220V obtains the direct current through first rectifier module, and the rethread contravariant module becomes the alternating current of medium-high frequency, obtains direct current output through second rectifier module again, through the aforesaid setting, and regulation second rectifier module that can be accurate exports suitable DC voltage, electric current or frequency, makes washing and polishing effect better.

Description

Control circuit of welding bead processor

Technical Field

The utility model belongs to the technical field of the welding bead processor, in particular to control circuit of welding bead processor.

Background

The traditional welding bead treatment is carried out by adopting cleaning cloth or a welding bead treatment machine, the cleaning cloth treatment speed is low, the efficiency is low, and the cleaning is not clean enough.

The principle used by the welding bead processor is electrochemistry, and the stainless steel surface oxide is processed in an electrolytic reduction mode to achieve the reduction effect. The machine itself requires a dc power supply, and two electrodes. One connected to the cathode and one connected to the anode. The anode is connected to the bottom wire clamp, the cathode is connected to the handle of the welding bead processor, the anode (bottom wire clamp) is clamped on a workpiece during use, the handle electrode part of the cathode is wrapped with insulating cloth (the insulating cloth has the function of insulating and absorbing water) and is stained with electrolyte, after the anode is electrified, the surface oxide of the stainless steel is repeatedly scrubbed, and the electrolyte in the insulating cloth wrapping the electrode at the handle part is subjected to electrolytic chemical action, so that the oxide on the surface of the stainless steel is dissolved, and the effect of removing welding spots and welding seams is achieved.

However, the current bead processing machine on the market has insufficient processing speed and high cost.

Patent 201520019967.4 discloses a welding bead processing device, which adds a solid voltage regulating part in the control circuit, so that the welding bead processing machine can freely regulate the voltage without being limited by the voltage gear when working. This welding bead processing apparatus, including quick-witted case, even there are welding bead treatment rifle head and earth clamp through the wire on the quick-witted case, be equipped with quick-witted case socket on the quick-witted case box, be equipped with control circuit in the quick-witted case, control circuit electricity links quick-witted case socket, control circuit includes solid-state voltage regulator, solid-state voltage regulator even has the potentiometre through the backward flow circuit, the output electricity of solid-state voltage regulator links the elementary of transformer, the rectifier bridge is linked to the secondary electricity of transformer, rectifier bridge output circuit establishes ties has the overload short-circuit protection device, the two table circuits that show of overload short-.

However, the welding bead processing device disclosed above, which is stepped down by the line frequency transformer and outputs DC voltage through the silicon bridge rectifier, cannot adjust appropriate output according to the output requirements of different production types, and is not good enough in cleaning and polishing effects, easy to generate sparks on the workpiece, and unsafe to use.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a control circuit of a weld bead processing machine, which can precisely adjust appropriate DC voltage, current or frequency, so that the cleaning and polishing effects are better, and no spark is generated to the workpiece, so that the use is safer.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a control circuit of welding bead processor, is including alternating current input end, first rectifier module, contravariant module, second rectifier module and control module, alternating current input end is connected with first rectifier module, through alternating current input end inserts the alternating current and gets into first rectifier module, first rectifier module is connected with the contravariant module, and first rectifier module becomes the direct current transmission with the alternating current and to the contravariant module, the contravariant module is connected with second rectifier module, and the contravariant module becomes the alternating current transmission of well high frequency with the direct current and to the second rectifier module, the second rectifier module is used for changing the alternating current into the direct current after-output, the second rectifier module still is connected with feedback circuit, feedback circuit is connected with the control module electricity, makes control module can adjust the voltage that second rectifier module exported through feedback circuit's setting, Current or frequency. The utility model discloses in, commercial power AC220V reachs the direct current through first rectifier module, and rethread contravariant module becomes the alternating current of medium-high frequency, again obtains direct current output through second rectifier module, and through feedback circuit and control module's setting, can export appropriate DC voltage, electric current or frequency through the accurate regulation second rectifier module of control module, it is better to make washing and polishing effect, and through the aforesaid setting, the direct current that makes the output does not produce the spark to the work piece, uses safelyr.

Further, a power switch is arranged at an alternating current input end, the first rectifying module comprises a first rectifying bridge and a filtering unit, the specific model of the first rectifying bridge is KBPC3510, the inverter module comprises a first triode, a second triode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first diode, a second diode and a first transformer, the models of the first triode and the second triode are FGH40N60, the specific model of the first transformer is EE25, and the first transformer comprises a first primary side, a second primary side and a secondary side;

the first rectifier bridge is connected with the filter unit and used for converting alternating current into direct current and transmitting the direct current to the filter unit, the filter unit is connected with a collector electrode of a first triode and used for transmitting filtered current to the first triode, one end of a first resistor is connected with the collector electrode of the first triode, the other end of the first resistor is connected with one end of a second resistor, the other end of the second resistor is connected with one end of a first capacitor, the other end of the first capacitor is connected with one end of a third resistor and then connected with the collector electrode of the second triode, the other end of the third resistor is connected with one end of a fourth resistor, the other end of the fourth resistor is connected with one end of a second capacitor, the other end of the second capacitor is connected with an emitter electrode of the second triode, a base electrode of the first triode is connected with an anode electrode of a first diode, and the fifth resistor is connected in parallel with two ends of the first diode, one end of the third capacitor is connected to the anode of the first diode, the other end of the third capacitor is connected to a connecting node between the emitter of the first triode and the collector of the second triode, the cathode of the first diode is connected with one end of a sixth resistor, the other end of the sixth resistor is connected with one end of the first primary side of the first transformer, the other end of the first primary side of the first transformer is connected with the collector of the second triode, the emitter of the first triode is connected with the collector of the second triode, the base of the second triode is connected with the anode of the second diode, the eighth resistor is connected in parallel with the two ends of the second diode, one end of the fourth capacitor is connected with the anode of the second diode, the other end of the fourth capacitor is connected with the emitter of the second triode, and the cathode of the second diode is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with one end of a second primary side of the first transformer, the other end of the second primary side of the first transformer is connected with an emitting electrode of the second triode, and a secondary side of the first transformer is connected with the control module. In the utility model, the first rectifier bridge is used for changing alternating current into direct current, the KBPC3510 is a bipolar diode, can handle powerful alternating current, the first triode and the second triode of the model FGH40N60, and the function is to amplify weak signals into electrical signals with larger amplitude values; the first transformer with the model number of EE25 is a high-frequency transformer and has the characteristics of small size, low price and high reliability, and the EE type transformer is a basic ferrite magnetic core and has stable performance, low cost and large current; through the arrangement, the first rectifying module can convert alternating current into direct current, the alternating current is transmitted to the inversion module after filtering, and the inversion module can invert the direct current into the alternating current through the arrangement that the first triode and the second triode are matched with other peripheral circuits.

Furthermore, the filter unit comprises a first electrolytic capacitor, a first filter capacitor and a second filter capacitor, wherein the anode of the first electrolytic capacitor is connected with the direct current anode of the first rectifier bridge, the cathode of the first electrolytic capacitor is connected with the direct current cathode of the first rectifier bridge, the cathode of the first electrolytic capacitor is grounded, one end of the first filter capacitor is connected with the anode of the first electrolytic capacitor, the other end of the first filter capacitor is connected with one end of the second filter capacitor, and the other end of the second filter capacitor is connected with the cathode of the first electrolytic capacitor. The utility model discloses in, through first electrolytic capacitor, first filter capacitor, second filter capacitor's setting, the filtering action that plays that can be better.

Furthermore, the first rectification module is further connected with a sampling unit, the sampling unit is electrically connected with the control module, and when the sampling unit detects that the current is too large, the control module stops inversion work by controlling the inversion module. The utility model discloses in, through the setting of sampling unit, can sample the electric current in the major loop constantly, in case the electric current exceeds the admissible value, just stop inverter circuit work through control module, play overcurrent protection function, use safelyr.

Further, the sampling unit comprises a second transformer, a first high-speed switching diode, a second high-speed switching diode, a third high-speed switching diode, a fourth high-speed switching diode, a ninth resistor and a tenth resistor, the second rectifying module comprises a third transformer, a second rectifying bridge, a third rectifying bridge, an eleventh resistor, a twelfth resistor, a fifth capacitor, a sixth capacitor and a seventh capacitor, the second transformer and the third transformer both comprise a primary side and a secondary side, the turn ratio of the primary side and the secondary side of the second transformer is 200:1, the turn ratio of the primary side and the secondary side of the third transformer is 16:2, and the second rectifying bridge and the third rectifying bridge both comprise 2 diodes;

one end of the primary side of the second transformer is connected to a connecting node between the first filter capacitor and the second filter capacitor, the other end of the primary side of the second transformer is connected to one end of the primary side of the third transformer, the other end of the primary side of the third transformer is connected to one end of a fifth capacitor, the other end of the fifth capacitor is connected to a connecting node between an emitter of the first triode and a collector of the second triode, an anode of the first high-speed switching diode is connected to a cathode of the second high-speed switching diode, a cathode of the first high-speed switching diode is connected to a cathode of the third high-speed switching diode and then connected to the control module, an anode of the third high-speed switching diode is connected to a cathode of the fourth high-speed switching diode, an anode of the fourth high-speed switching diode is connected to an anode of the second high-speed switching diode and then grounded, one end of a secondary side of the second transformer is connected to a connection node between the first high-speed switching diode and the second high-speed switching diode, and the other end of the secondary side of the second transformer is connected to a connection node between the third high-speed switching diode and the fourth high-speed switching diode;

the input end of the second rectifier bridge is connected with one end of the secondary side of the third transformer, one end of an eleventh resistor is connected with a connection node between the input end of the second rectifier bridge and the secondary side of the third transformer, the other end of the eleventh resistor is connected with one end of a sixth capacitor, the other end of the sixth capacitor is connected with the output end of the second rectifier bridge, the input end of the third rectifier bridge is connected with the other end of the secondary side of the third transformer, one end of a twelfth resistor is connected with a connection node between the input end of the third rectifier bridge and the secondary side of the third transformer, the other end of the twelfth resistor is connected with one end of a seventh capacitor, the other end of the seventh capacitor is connected with the output end of the third rectifier bridge, the output end of the second rectifier bridge is connected with the output end of the third rectifier bridge, and one ends of the ninth resistor and the tenth resistor are both connected with the cathode of the third high-speed switching diode, and the other ends of the ninth resistor and the tenth resistor are connected with the anode of a fourth high-speed switching diode. The utility model discloses in, through the second transformer, first high speed switch diode, the high speed switch diode of second, third high speed switch diode and fourth high speed switch diode, the third transformer, second rectifier bridge and third rectifier bridge and peripheral circuit's setting, realization that can be better can be constantly to sampling the electric current in the major loop through the sampling unit, in case the electric current exceeds the admissible value, just stop inverter circuit work through control module, play overcurrent protection function, it is safer to use.

Furthermore, the control module comprises a main control unit, a first adjusting unit, a second adjusting unit, a switch unit, a first operational amplifying unit and a second operational amplifying unit, wherein the first adjusting unit, the second adjusting unit, the switch unit and the first operational amplifying unit are all connected with the main control unit, the second operational amplifying unit is connected with the switch unit, two ends of a secondary side of the first transformer are respectively connected with the first adjusting unit and the second adjusting unit, a cathode of a first high-speed switching diode of the sampling unit is connected with a cathode of a third high-speed switching diode and then connected with the second operational amplifying unit, and a secondary side of the third transformer is connected with the first operational amplifying unit through a feedback circuit. In the utility model, through the arrangement of the main control unit, the driving unit can be controlled by the first adjusting unit and the second adjusting unit, so as to control the start and stop of the inverter circuit, play the role of overcurrent protection and ensure safer use; the main control unit can control the first operational amplification unit to control the feedback circuit, so that the voltage, the current or the frequency output by the second rectification module are adjusted through the feedback circuit; the main control unit can control the second operational amplification unit through the switch unit so as to be connected with the sampling unit, the current in the main loop can be sampled constantly through the sampling unit, and the overcurrent protection effect is achieved.

Furthermore, the control module is also connected with an overheating protection unit for protecting the control module, the overheating protection unit is provided with an adjusting port and a thermosensitive switch interface, and the adjusting port and the thermosensitive switch interface are both connected with the control module. The utility model discloses in, through the setting of overheat protection unit, carry out heat detection to main device in case the heat exceeds the admissible value, just stop inverter circuit work through control module, use safelyr.

Furthermore, the second rectification module is also connected with a hand switch unit, and the hand switch unit is connected with the switch unit of the control module and used for manually controlling the switch. The utility model discloses in, can reduce the power consumption of machine through hand switch unit control module's switch.

Furthermore, the first rectification module is also connected with an auxiliary power supply module used for supplying power to the control module, and the auxiliary power supply module is electrically connected with the control module. The utility model discloses in, can give control module through the power supply of auxiliary power source module, the working effect is high.

Furthermore, the control circuit of the welding bead processor further comprises a cooling fan unit used for cooling and an indicating unit used for emitting light to play an indicating role, the indicating unit comprises a power indicator and an abnormal indicator, and the cooling fan unit and the indicating unit are both electrically connected with the control module. The utility model discloses in, the radiator fan unit can play the radiating action, and the machine during operation, power indicator lights, and when the abnormal conditions appeared, the abnormal indicator lights, and it is safer to use.

Further, the main control unit comprises a main control chip, and the specific model of the main control chip is SG2525 AN; the first regulating unit comprises a first metal-oxide-semiconductor field effect transistor, a first TVS diode, a second TVS diode, a third diode, a thirteenth resistor, a fourteenth resistor, an eighth capacitor and a ninth capacitor, the second regulating unit comprises a second metal-oxide-semiconductor field effect transistor, a third TVS diode, a fourth diode, a fifteenth resistor, a sixteenth resistor, a tenth capacitor and an eleventh capacitor, and the first metal-oxide-semiconductor field effect transistor and the second metal-oxide-semiconductor field effect transistor are both ECN603S in model; the switch unit comprises a third triode, a fourth triode, a fifth TVS diode, a seventeenth resistor and a twelfth capacitor;

the first operational amplification unit comprises a first operational amplifier, a first light emitting diode, a second light emitting diode, a fifth triode, a sixth triode, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor and a seventeenth capacitor, the second operational amplification unit comprises a second operational amplifier, an eighth TVS diode, a sixth diode, a seventh diode, an eighth diode, a twenty-fifth resistor, a twenty-sixth resistor, an eighteenth capacitor and a thermistor, and the specific models LM of the first operational amplifier and the second operational amplifier are 358;

the GND pin of the first metal-oxide-semiconductor field effect transistor is grounded, the OUT pin of the first metal-oxide-semiconductor field effect transistor is connected with one end of the secondary side of the first transformer, the cathode of the first TVS diode is connected with the IN2 pin of the first metal-oxide-semiconductor field effect transistor, the eighth capacitor is connected IN parallel with two ends of the first TVS diode, one end of the thirteenth resistor is connected with the anode of the first TVS diode and connected on the connection node of the eighth capacitor and the first TVS diode, the other end of the thirteenth resistor is connected with the OUTA pin of the main control chip, the ninth capacitor is connected IN parallel with two ends of the second TVS diode, one end of the fourteenth resistor is connected with the cathode of the second TVS diode and connected on the connection node between the ninth capacitor and the second TVS diode, the other end of the fourteenth resistor is connected with the OUTA pin of the main control chip, the anode of the second TVS diode is connected with the IN1 pin of the first MOSFET, the anode of the third diode is connected with the IN1 pin of the first MOSFET, and the cathode of the third diode is grounded;

the GND pin of the second metal-oxide-semiconductor field effect transistor is grounded, the OUT pin of the second metal-oxide-semiconductor field effect transistor is connected with the other end of the secondary side of the first transformer, the cathode of the third TVS diode is connected with the IN2 pin of the first metal-oxide-semiconductor field effect transistor, the tenth capacitor is connected IN parallel with two ends of the third TVS diode, one end of the fifteenth resistor is connected with the anode of the first TVS diode and is connected with the connection node of the tenth capacitor and the third TVS diode, the other end of the fifteenth resistor is connected with the OUTB pin of the main control chip, the eleventh capacitor is connected IN parallel with two ends of the fourth TVS diode, one end of the sixteenth resistor is connected with the cathode of the fourth TVS diode and is connected with the connection node between the eleventh capacitor and the fourth TVS diode, and the other end of the sixteenth resistor is connected with the OUTB pin of the main control chip, the anode of the fourth TVS diode is connected with the IN1 pin of the second metal oxide semiconductor field effect transistor, the anode of the fourth diode is connected with the IN1 pin of the second metal oxide semiconductor field effect transistor, and the cathode of the fourth diode is grounded;

the CSS pin of a main control chip of a collector of a third triode of the switch unit is connected, the hand switch is connected with the collector of the third triode, an emitter of the third triode is grounded, a base of the third triode is connected with a collector of a fourth triode, an emitter of the fourth triode is grounded, a base of the fourth triode is connected with an anode of a fifth TVS diode, a cathode of the fifth TVS diode is connected with a connecting node between the base of the third triode and the collector of the fourth triode, one end of a seventeenth resistor is connected with the base of the fourth triode, the other end of the seventeenth resistor is connected with an anode of a sixth diode, a cathode of the sixth diode is connected with an output end of a second operational amplifier, and a twelfth capacitor is connected in parallel with two ends of the seventeenth resistor;

the inverting input end of the second operational amplifier is connected with one end of a thermistor, the other end of the thermistor is connected with a thermal switch interface of the overheating protection unit, the non-inverting input end of the second operational amplifier is connected with one end of a twenty-fifth resistor, the other end of the twenty-fifth resistor is connected with one end of a twenty-sixth resistor, the other end of the twenty-sixth resistor is connected with the anode of a seventh diode, the cathode of the seventh diode is connected with the output end of the second operational amplifier, the abnormality indicator lamp is connected with the output end of the second operational amplifier, the anode of the eighth diode is connected with the output end of the second operational amplifier, the cathode of the eighth diode is connected with the anode of the eighth TVS diode, and the cathode of the eighth TVS diode is connected with the cathode of a third high-speed switch diode of the sampling unit, the eighteenth capacitor is connected in parallel between the eighth diode and the eighth TVS diode;

the positive phase input end of the first operational amplifier is grounded, the secondary side of the third transformer is connected with the inverting input end of the first operational amplifier through a feedback circuit, one end of a thirteenth capacitor is connected with the inverting input end of the first operational amplifier, the other end of the thirteenth capacitor is connected with the output end of the first operational amplifier, one end of a fourteenth capacitor is connected with the inverting input end of the first operational amplifier, the other end of the fourteenth capacitor is connected with one end of an eighteenth resistor, the other end of the eighteenth resistor is connected with the output end of the first operational amplifier, the anode of the first light-emitting diode is connected with the output end of the first operational amplifier, the cathode of the first light-emitting diode is connected with the anode of the second light-emitting diode, the cathode of the second light-emitting diode is connected with the inverting input end of the first operational amplifier, and one end of the nineteenth resistor is connected with the cathode of the first, the other end of the nineteenth resistor is connected with one end of a fifteenth capacitor, the other end of the fifteenth capacitor is connected with the anode of a second light-emitting diode, one end of the twentieth resistor is connected with the cathode of a first light-emitting diode, the other end of the twentieth resistor is connected with an adjusting port of an overheating protection unit, one end of the twenty-first resistor is connected with the inverting input end of a first operational amplifier, the other end of the twenty-first resistor is connected with the cathode of a fifth diode, the anode of the fifth diode is connected with the collector of a fifth triode, one end of the sixteenth capacitor is connected with the cathode of a fifth diode, the other end of the sixteenth capacitor is connected with the emitter of the fifth triode, the emitter of the fifth triode is grounded, the base of the fifth triode is connected with one end of a twenty-second resistor, and the other end of the twenty-second resistor is connected with the output end of the first operational amplifier, one end of the twenty-third resistor is connected with the output end of the first operational amplifier, the other end of the twenty-third resistor is connected with the base electrode of the sixth triode, the emitting electrode of the sixth triode is grounded, the collecting electrode of the sixth triode is connected with the COMPN pin of the main control chip, one end of the twenty-fourth resistor is connected with the base electrode of the sixth triode, the other end of the twenty-fourth resistor is connected with the emitting electrode of the sixth triode, and the seventeenth capacitor is connected in parallel at two ends of the twenty-fourth resistor. In the present invention, SG2525AN can provide better performance and lower the external parts count; the MOS field effect transistor can allow current to pass through, and the magnitude of the current which can flow through the channel of the MOS field effect transistor can be changed under the control of the MOS field effect transistor according to different voltage values applied to the grid, and the LM358 is a double operational amplifier and internally comprises two independent operational amplifiers with high gain and internal frequency compensation; through the setting of above-mentioned circuit structure, the suitable DC voltage of regulation second rectifier module output, electric current or frequency that can be accurate make washing and polishing effect better, moreover through the aforesaid setting, make the direct current of output not produce the spark to the work piece, use safelyr.

Further, the auxiliary power supply module comprises a power switch controller, a chip coupler, a fourth transformer, a first fast recovery diode, a second fast recovery diode, a sixth TVS diode, a seventh TVS diode, a second electrolytic capacitor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor and a twenty-third capacitor;

the specific model of the power switch controller is TNY275, the specific model of the chip coupler is PC817, the specific model of the fourth transformer is EE19, the specific model of the first fast recovery diode is BYV26E, the specific model of the seventh TVS diode is P6KE200, the specific model of the second fast recovery diode is SS110, the source electrode of the power switch controller is grounded, the drain electrode of the power switch controller is connected with the collector electrode of the third triode of the switch unit, the BP/M pin of the power switch controller is connected with one end of the twentieth capacitor, the other end of the twentieth capacitor is connected with the source electrode of the power switch controller, the EN/UV pin of the power switch controller is connected with the collector electrode of the chip coupler and grounded, the emitter electrode of the chip coupler is connected with the source electrode of the power switch controller, the anode of the chip coupler is grounded, the cathode of the chip coupler is connected with the cathode of a sixth TVS diode, the anode of the sixth TVS diode is grounded, one end of a twenty-seventh resistor is connected with the cathode of the chip coupler, the other end of the twenty-seventh resistor is connected with the anode of the chip coupler, the anode of a first fast recovery diode is connected with the drain electrode of a power switch controller, the cathode of the first fast recovery diode is connected with the cathode of a seventh TVS diode, the anode of the seventh TVS diode is externally connected with 310V alternating current, one end of the primary side of a fourth transformer is connected with the anode of the first fast recovery diode, the other end of the primary side of the fourth transformer is connected with the anode of the seventh TVS diode, one end of the secondary side of the fourth transformer is connected with the anode of the second fast recovery diode, and the other end of the secondary side of the fourth transformer is grounded, the negative pole of the second fast recovery diode is connected with one end of the twenty-first capacitor, the other end of the twenty-first capacitor is grounded, one end of the twenty-second capacitor is connected with the positive pole of the seventh TVS diode, the other end of the twenty-second capacitor is grounded, one end of the twenty-eighth resistor is connected with the positive pole of the second fast recovery diode, the other end of the twenty-eighth resistor is connected with one end of the twenty-third capacitor, the other end of the twenty-third capacitor is connected with the positive pole of the second electrolytic capacitor, the negative pole of the second electrolytic capacitor is grounded, one end of the twenty-ninth resistor is connected with the negative pole of the second fast recovery diode, and the other end of the twenty-ninth resistor is connected with the positive pole of the chip coupler.

The utility model discloses in, the setting of switch controller can be better supplies power to control module, and PC817 optoelectronic coupler for signal transmission makes the front end keep apart with the load completely, and aim at increases the security, reduces circuit interference, simplifies circuit design. When the input end is electrified, the light emitter emits light rays to irradiate the light receiver, the light receiver is conducted after receiving the light rays, and photocurrent is generated and output from the output end, so that 'electricity-light-electricity' conversion is realized, and the PC817 photoelectric coupler not only can play a feedback role, but also can play an isolation role; the EE19 high-frequency transformer has the characteristics of small size, low price and high reliability, and the EE transformer is a basic ferrite magnetic core, has stable performance, low cost and large current; the BYV26E diode is used for a switching power supply and is a semiconductor diode with the characteristics of good switching characteristic and short reverse recovery time; the P6KE200 is a TVS diode, mainly used for protecting important devices in a line, mainly for preventing static electricity, having extremely fast response time (sub-nanosecond level) and quite high surge absorption capability, when two ends of the TVS are subjected to transient high-energy impact, the TVS can change the impedance value between the two ends from high impedance to low impedance at extremely high speed to absorb a transient large current and clamp the voltage at the two ends of the TVS at a predetermined value, thereby protecting the following circuit elements from the impact of transient high-voltage spike pulse; the SS110 is a fast recovery rectifier diode and is used for outputting after being rectified and filtered by an inductance capacitor; through the arrangement of the circuit structure, a power supply can be better supplied to the control module.

The utility model has the advantages that:

compared with the prior art, the utility model provides a control circuit of weld bead processor, commercial power AC220V reachs the direct current through first rectifier module, rethread contravariant module becomes the alternating current of medium-high frequency, obtain direct current output through second rectifier module again, setting through feedback circuit and control module, can export appropriate DC voltage through the accurate regulation second rectifier module of control module, electric current or frequency, it is better to make washing and polishing effect, and through the aforesaid setting, make the direct current of output not produce the spark to the work piece, it is safer to use.

Drawings

Fig. 1 is a schematic circuit diagram of a control circuit of a weld bead processing machine according to the present invention.

Fig. 2 is a schematic circuit diagram of a control module of a control circuit of a weld bead processing machine according to the present invention.

Fig. 3 is a schematic circuit diagram of an auxiliary power supply module of a control circuit of a weld bead processing machine according to the present invention.

Fig. 4 is a schematic circuit diagram of an overheat protection unit of a control circuit of a weld bead processing machine according to the present invention.

Fig. 5 is a schematic circuit diagram of a hand switch unit of a control circuit of a weld bead processing machine according to the present invention.

Fig. 6 is a schematic circuit diagram of a radiator fan unit of a control circuit of a weld bead processing machine according to the present invention.

Fig. 7 is a schematic circuit diagram of a power indicator of a control circuit of a weld bead processing machine according to the present invention.

Fig. 8 is a schematic circuit diagram of an abnormality indicator lamp of a control circuit of a weld bead processing machine according to the present invention.

Fig. 9 is a schematic structural view of a PIN of a control circuit of a weld bead processing machine according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The technical scheme of the utility model as follows:

referring to fig. 1 to 9, the present invention provides a control circuit of a bead processor, including an ac input terminal 1, a first rectifying module 2, an inverter module 3, a second rectifying module 4 and a control module 5, where the ac input terminal 1 is connected to the first rectifying module 2, ac power is inputted through the ac input terminal 1 to enter the first rectifying module 2, the first rectifying module 2 is connected to the inverter module 3, the first rectifying module 2 converts ac power into dc power and transmits the dc power to the inverter module 3, the inverter module 3 is connected to the second rectifying module 4, the inverter module 3 converts dc power into ac power with medium-high frequency and transmits the ac power to the second rectifying module 4, the second rectifying module 4 is configured to convert ac power into dc power and output the dc power, the second rectifying module 4 is further connected to a feedback circuit 6, the feedback circuit 6 is electrically connected to the control module 5, and the control module 5 can adjust the ac power outputted by the feedback circuit 6 through the feedback circuit 6 Voltage, current, or frequency. The utility model discloses in, commercial power AC220V reachs the direct current through first rectifier module 2, rethread contravariant module 3 becomes the alternating current of medium-high frequency, obtain direct current output through second rectifier module 4 again, setting through feedback circuit 6 and control module 5, can export appropriate DC voltage, electric current or frequency through the accurate regulation second rectifier module 4 of control module 5, it is better to make washing and polishing effect, and through the aforesaid setting, the direct current that makes the output does not produce the spark to the work piece, it is safer to use.

In specific application, commercial power AC220V passes through the first rectification module 2 to obtain DC310V, then passes through the inversion module 3 to be changed into 40KHZ medium-high frequency alternating current, and then passes through the second rectification module 4 to obtain 18-24V direct current output.

In this embodiment, the ac input terminal 1 is provided with a power switch 11, the first rectifying module 2 includes a first rectifying bridge BD1 and a filtering unit, the specific model of the first rectifying bridge BD1 is KBPC3510, the inverting module 3 includes a first triode G2, a second triode G4, a first resistor R41, a second resistor R2, a third resistor R3, a fourth resistor R40, a fifth resistor R5, a sixth resistor R4, a seventh resistor R9, an eighth resistor R8, a first capacitor C7, a second capacitor C8, a third capacitor C42, a fourth capacitor C635928, a first diode D9, a second diode D9, a first transformer T4, the models of the first triode G2 and the second triode G4 are both FGH40N60, the specific model of the first transformer T4 is 25, and the first transformer T4 includes a primary side, a second secondary side and a secondary side;

the first rectifier bridge BD1 is connected with the filter unit and used for converting alternating current into direct current and transmitting the direct current to the filter unit, the filter unit is connected with a collector of a first triode G2 and used for transmitting the filtered current to a first triode G2, one end of a first resistor R41 is connected with a collector of a first triode G2, the other end of a first resistor R41 is connected with one end of a second resistor R2, the other end of a second resistor R2 is connected with one end of a first capacitor C7, the other end of the first capacitor C7 is connected with one end of a third resistor R3 and then connected with a collector of a second triode G4, the other end of a third resistor R3 is connected with one end of a fourth resistor R40, the other end of a fourth resistor R40 is connected with one end of a second capacitor C8, the other end of the second capacitor C8 is connected with an emitter of a second triode G4, a base of the first triode G2 is connected with an anode of a first diode D5, and a fifth resistor R5857323 is connected in parallel with two ends, one end of a third capacitor C17 is connected to an anode of the first diode D8, the other end of the third capacitor C17 is connected to a connection node between an emitter of the first transistor G2 and a collector of the second transistor G4, a cathode of the first diode D8 is connected to one end of a sixth resistor R4, the other end of the sixth resistor R4 is connected to one end of a first primary side of the first transformer T4, the other end of the first primary side of the first transformer T4 is connected to a collector of the second transistor G4, an emitter of the first transistor G2 is connected to a collector of the second transistor G4, a base of the second transistor G4 is connected to an anode of the second diode D9, an eighth resistor R8 is connected in parallel to both ends of the second diode D5, one end of the fourth capacitor C18 is connected to an anode of the second diode D9, the other end of the fourth capacitor C18 is connected to an emitter of the second transistor G4, a cathode of the second diode D9 is connected to a seventh resistor 5739, the other end of the seventh resistor R9 is connected to one end of the second primary side of the first transformer T4, the other end of the second primary side of the first transformer T4 is connected to the emitter of the second transistor G4, and the secondary side of the first transformer T4 is connected to the control module 5. In the utility model, the first rectifier bridge BD1 is used for changing alternating current into direct current, the KBPC3510 is a bipolar diode, and can process high-power alternating current, the first triode G2 and the second triode G4 of the model FGH40N60 have the function of amplifying weak signals into electrical signals with large amplitude values; the first transformer T4 with the model number of EE25 is a high-frequency transformer and has the characteristics of small size, low price and high reliability, and the EE type transformer is a basic ferrite magnetic core and has stable performance, low cost and large current; through the arrangement, the alternating current can be changed into the direct current by the first rectifying module 2, the alternating current is transmitted to the inversion module 3 after filtering, and the direct current can be inverted into the alternating current by the inversion module 3 through the arrangement that the first triode G2 and the second triode G4 are matched with other peripheral circuits.

In this embodiment, the filter unit includes a first electrolytic capacitor C5, a first filter capacitor C4, and a second filter capacitor C6, an anode of the first electrolytic capacitor C5 is connected to a dc positive electrode of the first rectifier bridge DB1, a cathode of the first electrolytic capacitor C5 is connected to a dc negative electrode of the first rectifier bridge BD1, a cathode of the first electrolytic capacitor C5 is grounded, one end of the first filter capacitor C4 is connected to an anode of the first electrolytic capacitor C5, the other end of the first filter capacitor C4 is connected to one end of the second filter capacitor C6, and the other end of the second filter capacitor C6 is connected to a cathode of the first electrolytic capacitor C5. The utility model discloses in, through first electrolytic capacitor C5, first filter capacitor C4, second filter capacitor C6's setting, can be better play the filtering action.

In this embodiment, the first rectifying module 2 is further connected to a sampling unit 7, the sampling unit 7 is electrically connected to the control module 5, and when the sampling unit 7 detects that the current is too large, the control module 5 stops the inversion operation by controlling the inversion module 3. The utility model discloses in, through the setting of sampling unit 7, can sample the electric current in the major loop constantly, in case the electric current exceeds the admissible value, just stop inverter circuit work through control module 5, play overcurrent protection function, use safelyr.

In this embodiment, the sampling unit 7 includes a second transformer T3, a first high-speed switching diode D5, a second high-speed switching diode D7, a third high-speed switching diode D6, a fourth high-speed switching diode D8, a ninth resistor R21 and a tenth resistor R22, the second rectification module 4 includes a third transformer T2, a second rectification bridge D1, a third rectification bridge D4, an eleventh resistor R15, a twelfth resistor R16, a fifth capacitor C11, a sixth capacitor C12 and a seventh capacitor C13, the second transformer T3 and the third transformer T2 both include a primary side and a secondary side, a turn ratio of the primary side and the secondary side of the second transformer T3 is 200:1, a turn ratio of the primary side and the secondary side of the third transformer T2 is 16:2, and each of the second rectification bridge D1 and the third rectification bridge D4 includes 2 diodes;

one end of the primary side of the second transformer T3 is connected to a connection node between the first filter capacitor C4 and the second filter capacitor C6, the other end of the primary side of the second transformer T3 is connected to one end of the primary side of the third transformer T2, the other end of the primary side of the third transformer T2 is connected to one end of a fifth capacitor C11, the other end of the fifth capacitor C11 is connected to a connection node between the emitter of the first transistor G2 and the collector of the second transistor G4, the anode of the first high-speed switching diode D5 is connected to the cathode of the second high-speed switching diode D7, the cathode of the first high-speed switching diode D5 is connected to the cathode of the third high-speed switching diode D6 and then to the control module 5, the anode of the third high-speed switching diode D6 is connected to the cathode of the fourth high-speed switching diode D8, the anode of the fourth high-speed switching diode D8 is connected to the anode of the second high-speed switching diode D7 and then to ground, one end of a secondary side of the second transformer T3 is connected to a connection node between the first high-speed switching diode D5 and the second high-speed switching diode D7, and the other end of the secondary side of the second transformer T3 is connected to a connection node between the third high-speed switching diode D6 and the fourth high-speed switching diode D8;

an input end of the second rectifying bridge D1 is connected to one end of a secondary side of the third transformer T2, one end of an eleventh resistor R15 is connected to a connection node between an input end of the second rectifying bridge D1 and a secondary side of the third transformer T2, the other end of the eleventh resistor R15 is connected to one end of a sixth capacitor C12, the other end of a sixth capacitor C12 is connected to an output end of the second rectifying bridge D1, an input end of the third rectifying bridge D4 is connected to the other end of the secondary side of the third transformer T2, one end of a twelfth resistor R16 is connected to a connection node between an input end of the third rectifying bridge D4 and the secondary side of the third transformer T2, the other end of the twelfth resistor R16 is connected to one end of a seventh capacitor C13, the other end of the seventh capacitor C13 is connected to an output end of the third rectifying bridge D4, an output end of the second rectifying bridge D1 is connected to an output end of the third rectifying bridge D4, a ninth resistor R5928 and a cathode 599 of the ninth resistor R599 are connected to the high-speed switch, the other ends of the ninth resistor R21 and the tenth resistor R22 are both connected to the anode of the fourth high-speed switching diode D8. The utility model discloses in, through second transformer T3, first high speed switch diode D5, second high speed switch diode D7, third high speed switch diode D6 and fourth high speed switch diode D8, third transformer T2, second rectifier bridge D1 and third rectifier bridge D4 and peripheral circuit's setting, the realization that can be better can be sampled the electric current in the major loop constantly through sampling unit 7, in case the electric current exceeds the permissible value, just stop inverter circuit work through control module 5, play overcurrent protection function, it is safer to use.

In this embodiment, the control module 5 includes a main control unit 51, a first adjusting unit 52, a second adjusting unit 53, a switch unit 54, a first operational amplifying unit 55, and a second operational amplifying unit 56, where the first adjusting unit 52, the second adjusting unit 53, the switch unit 54, and the first operational amplifying unit 55 are all connected to the main control unit 51, the second operational amplifying unit 56 is connected to the switch unit 54, two ends of a secondary side of the first transformer T4 are respectively connected to the first adjusting unit 52 and the second adjusting unit 53, a cathode of the first high-speed switching diode D5 of the sampling unit 7 is connected to a cathode of the third high-speed switching diode D6 and then connected to the second operational amplifying unit 56, and a secondary side of the third transformer T2 is connected to the first operational amplifying unit 55 through the feedback circuit 6. In the utility model, through the arrangement of the main control unit 51, the driving unit can be controlled through the first adjusting unit 52 and the second adjusting unit 53, so as to control the start and stop of the inverter circuit, thereby having the function of overcurrent protection and being safer to use; the main control unit 51 can control the first operational amplifier unit 55 to control the feedback circuit 6, so that the voltage, current or frequency output by the second rectifier module 4 is adjusted by the feedback circuit 6; the main control unit 51 can control the second operational amplification unit 56 through the switch unit 54, so as to be connected with the sampling unit 7, so that the current in the main loop can be sampled at any time through the sampling unit 7, and an overcurrent protection effect is achieved.

In the present embodiment, the control module 5 is further connected with an overheating protection unit 8 for protecting the control module 5, the overheating protection unit 8 is provided with an adjusting port 81 and a thermal switch interface 82, and the adjusting port 81 and the thermal switch interface 82 are both connected with the control module 5. The utility model discloses in, through the setting of overheat protection unit 8, carry out heat detection to main device in case the heat exceeds the admissible value, just stop inverter circuit work through control module 5, use safelyr.

In the present embodiment, the second rectification module 4 is further connected with a hand switch unit 9, and the hand switch unit 9 is connected with the switch unit 54 of the control module 5 for manually controlling the switch. The utility model discloses in, can reduce the power consumption of machine through the switch of hand switch unit 9 control module 5.

In this embodiment, the first rectification module 2 is further connected to an auxiliary power module 10 for supplying power to the control module 5, and the auxiliary power module 10 is electrically connected to the control module 5. The utility model discloses in, can supply power for control module 5 through auxiliary power supply module 10, the working effect is high.

In this embodiment, the control circuit of the weld bead processor further includes a heat dissipation fan unit 20 for dissipating heat and an indication unit for emitting light to indicate, the indication unit includes a power indicator 30 and an abnormality indicator 40, and both the heat dissipation fan unit 20 and the indication unit are electrically connected to the control module 5. The utility model discloses in, radiator fan unit 20 can play the radiating action, and the machine during operation, power indicator 30 is bright, and when the abnormal conditions appeared, abnormal indicator 40 was bright, and it is safer to use.

In a specific application, the driving unit, the sampling unit 7, the feedback circuit 6, the auxiliary power module 10, the hand switch unit 9, the overheating protection unit 8, the cooling fan unit 20 and the indication unit are all connected with the control module 5 through a PIN J1.

In this embodiment, the main control unit 51 includes a main control chip U2, and the specific model of the main control chip U2 is SG2525 AN; the first adjusting unit 52 includes a first mosfet VT2, a first TVS diode Z4, a second TVS diode Z3, a third diode D4, a thirteenth resistor R34, a fourteenth resistor R33, an eighth capacitor C20 and a ninth capacitor C19, the second adjusting unit 53 includes a second mosfet VT1, a third TVS diode Z6, a fourth TVS diode Z5, a fourth diode D5, a fifteenth resistor R37, a sixteenth resistor R36, a tenth capacitor C22 and an eleventh capacitor C21, and the first mosfet VT2 and the second mosfet VT1 are all ECN 603S; the switch unit 54 includes a third transistor V3, a fourth transistor V2, a fifth TVS diode Z2, a seventeenth resistor R22, and a twelfth capacitor C15;

the first operational amplification unit 55 includes a first operational amplifier U1B, a first light emitting diode L2, a second light emitting diode L1, a fifth diode D3, a fifth triode Q1, a sixth triode V4, an eighteenth resistor R9, a nineteenth resistor R4, a twentieth resistor R8, a twenty-first resistor R6, a twenty-second resistor R13, a twenty-third resistor R18, a twenty-fourth resistor R20, a thirteenth capacitor C20, a fourteenth capacitor C20, a fifteenth capacitor C20, a sixteenth capacitor C20 and a seventeenth capacitor C20, the second operational amplification unit 56 includes a second operational amplifier U1 20, an eighth TVS diode Z20, a sixth diode D20, a seventh diode D20, an eighth diode V20, a twenty-fifth resistor R20, a twenty-sixth resistor R20, an eighteenth capacitor C20, a thermistor R20, a first operational amplifier U1 and a second operational amplifier LM 20;

the GND pin of the first mosfet VT2 is grounded, the OUT pin of the first mosfet VT2 is connected to one end of the secondary side of the first transformer T4, the cathode of the first TVS diode Z4 is connected to the IN2 pin of the first mosfet VT2, the eighth capacitor C20 is connected IN parallel to both ends of the first TVS diode Z4, one end of the thirteenth resistor R34 is connected to the anode of the first TVS diode Z4 and to the connection node of the eighth capacitor C20 and the first TVS diode Z4, the other end of the thirteenth resistor R34 is connected to the OUTA of the main control chip U2, the ninth capacitor C19 is connected IN parallel to both ends of the second TVS diode Z3, one end of the fourteenth resistor R33 is connected to the cathode of the second TVS diode Z3 and to the connection node between the ninth capacitor C19 and the second TVS diode Z5, the other end of the fourteenth resistor R33 is connected to the OUTA pin of the main control chip U57324, the anode of the second TVS diode Z3 is connected to the IN1 pin of the first mosfet VT2, the anode of the third diode D4 is connected to the IN1 pin of the first mosfet VT2, and the cathode of the third diode D4 is grounded;

a GND pin of the second mosfet VT1 is grounded, an OUT pin of the second mosfet VT1 is connected to the other end of the secondary side of the first transformer T4, a cathode of the third TVS diode Z6 is connected to an IN2 pin of the first mosfet VT2, a tenth capacitor C22 is connected IN parallel to both ends of the third TVS diode Z6, one end of a fifteenth resistor R37 is connected to an anode of the first TVS diode Z4 and to a connection node of the tenth capacitor C22 and the third TVS diode Z6, the other end of the fifteenth resistor R37 is connected to an OUTB of the main control chip U2, an eleventh capacitor C21 is connected IN parallel to both ends of the fourth TVS diode Z5, one end of the sixteenth resistor R36 is connected to a cathode of the fourth TVS diode Z5 and to a connection node between the eleventh capacitor C21 and the fourth TVS diode Z5, and the other end of the sixteenth resistor R36 is connected to an OUTB pin 573 of the main control chip U57324, the anode of the fourth TVS diode Z5 is connected to the IN1 pin of the second mosfet VT1, the anode of the fourth diode D5 is connected to the IN1 pin of the second mosfet VT1, and the cathode of the fourth diode D5 is grounded;

a CSS pin of a main control chip U2 of a collector of a third transistor V3 of the switching unit 54 is connected, and a hand switch is connected to a collector of a third transistor V3, an emitter of the third transistor V3 is grounded, a base of the third transistor V3 is connected to a collector of a fourth transistor V2, an emitter of the fourth transistor V2 is grounded, a base of the fourth transistor V2 is connected to an anode of a fifth TVS diode Z2, a cathode of the fifth TVS diode Z2 is connected to a connection node between the base of the third transistor V3 and the collector of the fourth transistor V2, one end of a seventeenth resistor R22 is connected to the base of the fourth transistor V2, the other end of the seventeenth resistor R22 is connected to an anode of a sixth diode D2, a cathode of the sixth diode D2 is connected to an output end of a second operational amplifier U1A, and a twelfth capacitor C15 is connected in parallel to both ends of the seventeenth resistor R22;

an inverting input terminal of the second operational amplifier U1A is connected to one end of a thermistor R11, the other end of the thermistor R11 is connected to a thermal switch interface 82 of the overheating protection unit 8, a non-inverting input terminal of the second operational amplifier U1A is connected to one end of a twenty-fifth resistor R10, the other end of the twenty-fifth resistor R10 is connected to one end of a twenty-sixth resistor R5, the other end of the twenty-sixth resistor R5 is connected to an anode of a seventh diode D1, a cathode of the seventh diode D1 is connected to an output terminal of the second operational amplifier U1A, the abnormality indicator light 40 is connected to an output terminal of the second operational amplifier U1A, an anode of the eighth diode V1 is connected to an output terminal of the second operational amplifier U1A, a cathode of the eighth diode V1 is connected to an anode of the eighth TVS diode Z1, a cathode of the eighth TVS diode Z1 is connected to a cathode of the third high speed switch diode D6 of the sampling unit 7, the eighteenth capacitor C10 is connected in parallel between the eighth diode V1 and the eighth TVS diode Z1;

the non-inverting input terminal of the first operational amplifier U1B is grounded, the secondary side of the third transformer T2 is connected to the inverting input terminal of the first operational amplifier U1B through the feedback circuit 6, one end of a thirteenth capacitor C2 is connected to the inverting input terminal of the first operational amplifier U1B, the other end of a thirteenth capacitor C2 is connected to the output terminal of the first operational amplifier U1B, one end of a fourteenth capacitor C5 is connected to the inverting input terminal of the first operational amplifier U1B, the other end of a fourteenth capacitor C5 is connected to one end of an eighteenth resistor R9, the other end of an eighteenth resistor R9 is connected to the output terminal of the first operational amplifier U1B, the anode of the first light emitting diode L2 is connected to the output terminal of the first operational amplifier U1B, the cathode of the first light emitting diode L2 is connected to the anode of the second light emitting diode L1, the cathode of the second light emitting diode L1 is connected to the inverting input terminal of the first operational amplifier U1 686, one end of a nineteenth resistor R4 is connected to a cathode of the first light emitting diode L2, the other end of the nineteenth resistor R4 is connected to one end of a fifteenth capacitor C6, the other end of the fifteenth capacitor C6 is connected to an anode of the second light emitting diode L1, one end of a twentieth resistor R8 is connected to a cathode of the first light emitting diode L2, the other end of a twentieth resistor R8 is connected to the regulation port 81 of the overheating protection unit 8, one end of a twenty-first resistor R6 is connected to the inverting input terminal of the first operational amplifier U1B, the other end of a twenty-first resistor R6 is connected to a cathode of the fifth diode D3, an anode of the fifth diode D3 is connected to a collector of the fifth triode Q1, one end of a sixteenth capacitor C12 is connected to a cathode of the fifth diode D3, the other end of a sixteenth capacitor C12 is connected to an emitter of the fifth triode Q1, an emitter of the fifth triode Q1 is grounded, the base of the fifth triode Q1 is connected with one end of a twenty-second resistor R13, the other end of the twenty-second resistor R13 is connected with the output end of the first operational amplifier U1B, one end of the twenty-third resistor R18 is connected with the output end of the first operational amplifier U1B, the other end of the twenty-third resistor R18 is connected with the base of the sixth triode V4, the emitter of the sixth triode V4 is grounded, the collector of the sixth triode V4 is connected with the COMPN pin of the main control chip U2, one end of the twenty-fourth resistor R20 is connected with the base of the sixth triode V4, the other end of the twenty-fourth resistor R20 is connected with the emitter of the sixth triode V4, and the seventeenth capacitor C13 is connected in parallel with the two ends of the twenty-fourth resistor R20. In the present invention, SG2525AN can provide better performance and lower the external parts count; the MOS field effect transistor can allow current to pass through, and the magnitude of the current which can flow through the channel of the MOS field effect transistor can be changed under the control of the MOS field effect transistor according to different voltage values applied to the grid, and the LM358 is a double operational amplifier and internally comprises two independent operational amplifiers with high gain and internal frequency compensation; through the setting of above-mentioned circuit structure, the suitable DC voltage of regulation second rectifier module 4 output, electric current or frequency that can be accurate make washing and polishing effect better, moreover through the aforesaid setting, make the direct current of output not produce the spark to the work piece, use safelyr.

In this embodiment, the auxiliary power module 10 includes a power switch controller U5, a chip coupler U4, a fourth transformer T4, a first fast recovery diode D6, a second fast recovery diode D10, a sixth TVS diode D10, a seventh TVS diode D5, a second electrolytic capacitor C12, a twenty-seventh resistor R26, a twenty-eighth resistor R19, a twenty-ninth resistor R25, a twentieth capacitor C18, a twenty-first capacitor C22, a twenty-second capacitor C7, and a twenty-third capacitor C19;

the specific model of the power switch controller U5 is TNY275, the specific model of the chip coupler U4 is PC817, the specific model of the fourth transformer T4 is EE19, the specific model of the first fast recovery diode D6 is BYV26E, the specific model of the seventh TVS diode D5 is P6KE200, the specific model of the second fast recovery diode D10 is SS110, the source of the power switch controller U5 is grounded, the drain of the power switch controller U5 is connected with the collector of the third triode V3 of the switch unit 54, the BP/M pin of the power switch controller U5 is connected with one end of the twentieth capacitor C18, the other end of the twentieth capacitor C18 is connected with the source of the power switch U5, the EN/UV pin of the power switch controller U5 is connected with the collector of the chip coupler U4 and grounded, the emitter of the chip coupler U4 is connected with the source of the power switch controller U5, the anode of the chip coupler U4, a cathode of the chip coupler U4 is connected to a cathode of the sixth TVS diode D10, an anode of the sixth TVS diode D10 is grounded, one end of a twenty-seventh resistor R26 is connected to a cathode of the chip coupler U4, the other end of the twenty-seventh resistor R26 is connected to an anode of the chip coupler U4, an anode of the first fast recovery diode D6 is connected to a drain of the power switch controller U5, a cathode of the first fast recovery diode D6 is connected to a cathode of the seventh TVS diode D5, an anode of the seventh TVS diode D5 is externally connected to the alternating current of 310V, one end of a primary side of a fourth transformer T4 is connected to an anode of the first fast recovery diode D6, the other end of a primary side of a fourth transformer T4 is connected to an anode of the seventh TVS diode D5, one end of a secondary side of the fourth transformer T4 is connected to an anode of the second fast recovery diode D10, the other end of the fourth transformer T4 is grounded, and one end of a secondary side of the second fast recovery diode D10 is connected to a cathode of the first capacitor 22C 364932, the other end of the twenty-first capacitor C22 is grounded, one end of the twenty-second capacitor C7 is connected with the anode of the seventh TVS diode D5, the other end of the twenty-second capacitor C7 is grounded, one end of the twenty-eighth resistor R19 is connected with the anode of the second fast recovery diode D10, the other end of the twenty-eighth resistor R19 is connected with one end of the twenty-third capacitor C19, the other end of the twenty-third capacitor C19 is connected with the anode of the second electrolytic capacitor C12, the cathode of the second electrolytic capacitor C12 is grounded, one end of the twenty-ninth resistor R25 is connected with the cathode of the second fast recovery diode D10, and the other end of the twenty-ninth resistor R25 is connected with the anode of the chip coupler U4.

The utility model discloses in, the setting of switch controller U5 can be better supplies power to control module 5, and PC817 optoelectronic coupler for signal transmission makes the front end keep apart with the load completely, and aim at increases the security, reduces circuit interference, simplifies circuit design. When the input end is electrified, the light emitter emits light rays to irradiate the light receiver, the light receiver is conducted after receiving the light rays, and photocurrent is generated and output from the output end, so that 'electricity-light-electricity' conversion is realized, and the PC817 photoelectric coupler not only can play a feedback role, but also can play an isolation role; the EE19 high-frequency transformer has the characteristics of small size, low price and high reliability, and the EE transformer is a basic ferrite magnetic core, has stable performance, low cost and large current; the BYV26E diode is used for a switching power supply and is a semiconductor diode with the characteristics of good switching characteristic and short reverse recovery time; the P6KE200 is a TVS diode, mainly used for protecting important devices in a line, mainly for preventing static electricity, having extremely fast response time (sub-nanosecond level) and quite high surge absorption capability, when two ends of the TVS are subjected to transient high-energy impact, the TVS can change the impedance value between the two ends from high impedance to low impedance at extremely high speed to absorb a transient large current and clamp the voltage at the two ends of the TVS at a predetermined value, thereby protecting the following circuit elements from the impact of transient high-voltage spike pulse; the SS110 is a fast recovery rectifier diode and is used for outputting after being rectified and filtered by an inductance capacitor; through the arrangement of the circuit structure, power can be better supplied to the control module 5.

The utility model has the advantages that:

The above description is intended to be illustrative of the present invention and is not intended to be limiting, and all such modifications, equivalents and improvements as fall within the spirit and scope of the invention are intended to be included therein.

Claims

1. The control circuit of the weld bead processor is characterized by comprising an alternating current input end, a first rectifying module, an inverting module, a second rectifying module and a control module, wherein the alternating current input end is connected with the first rectifying module, alternating current is accessed to the alternating current input end to enter the first rectifying module, the first rectifying module is connected with the inverting module, the alternating current is converted into direct current by the first rectifying module and is transmitted to the inverting module, the inverting module is connected with the second rectifying module, the alternating current converted into medium and high frequency alternating current is transmitted to the second rectifying module by the inverting module, the second rectifying module is used for converting the alternating current into the direct current and then outputting the direct current, the second rectifying module is further connected with a feedback circuit, the feedback circuit is electrically connected with the control module, and the control module can adjust the voltage output by the second rectifying module through the feedback circuit, Current or frequency.

2. The control circuit of the bead processor according to claim 1, wherein a power switch is provided at an ac input terminal, the first rectifying module includes a first rectifying bridge and a filtering unit, the first rectifying bridge is of a specific type of KBPC3510, the inverting module includes a first transistor, a second transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first diode, a second diode, and a first transformer, the first transistor and the second transistor are of a type FGH40N60, the first transformer is of a specific type of EE25, and the first transformer includes a first primary side, a second primary side, and a secondary side;

the first rectifier bridge is connected with the filter unit and used for converting alternating current into direct current and transmitting the direct current to the filter unit, the filter unit is connected with a collector electrode of a first triode and used for transmitting filtered current to the first triode, one end of a first resistor is connected with the collector electrode of the first triode, the other end of the first resistor is connected with one end of a second resistor, the other end of the second resistor is connected with one end of a first capacitor, the other end of the first capacitor is connected with one end of a third resistor and then connected with the collector electrode of the second triode, the other end of the third resistor is connected with one end of a fourth resistor, the other end of the fourth resistor is connected with one end of a second capacitor, the other end of the second capacitor is connected with an emitter electrode of the second triode, a base electrode of the first triode is connected with an anode electrode of a first diode, and the fifth resistor is connected in parallel with two ends of the first diode, one end of the third capacitor is connected to the anode of the first diode, the other end of the third capacitor is connected to a connecting node between the emitter of the first triode and the collector of the second triode, the cathode of the first diode is connected with one end of a sixth resistor, the other end of the sixth resistor is connected with one end of the first primary side of the first transformer, the other end of the first primary side of the first transformer is connected with the collector of the second triode, the emitter of the first triode is connected with the collector of the second triode, the base of the second triode is connected with the anode of the second diode, the eighth resistor is connected in parallel with the two ends of the second diode, one end of the fourth capacitor is connected with the anode of the second diode, the other end of the fourth capacitor is connected with the emitter of the second triode, and the cathode of the second diode is connected with one end of the seventh resistor, the other end of the seventh resistor is connected with one end of a second primary side of the first transformer, the other end of the second primary side of the first transformer is connected with an emitting electrode of the second triode, and a secondary side of the first transformer is connected with the control module.

3. The control circuit of bead processing machine according to claim 2, wherein the filter unit includes a first electrolytic capacitor, a first filter capacitor, and a second filter capacitor, an anode of the first electrolytic capacitor is connected to a dc positive electrode of the first rectifier bridge, a cathode of the first electrolytic capacitor is connected to a dc negative electrode of the first rectifier bridge, and a cathode of the first electrolytic capacitor is grounded, one end of the first filter capacitor is connected to the anode of the first electrolytic capacitor, the other end of the first filter capacitor is connected to one end of the second filter capacitor, and the other end of the second filter capacitor is connected to the cathode of the first electrolytic capacitor.

4. The control circuit of the bead processing machine according to claim 3, wherein the first rectifying module is further connected to a sampling unit, the sampling unit is electrically connected to the control module, and when the sampling unit detects that the current is too large, the control module stops the inversion operation by controlling the inversion module.

5. The control circuit of the bead processing machine according to claim 4, wherein the sampling unit comprises a second transformer, a first high-speed switching diode, a second high-speed switching diode, a third high-speed switching diode, a fourth high-speed switching diode, a ninth resistor and a tenth resistor, the second rectifier module comprises a third transformer, a second rectifier bridge, a third rectifier bridge, an eleventh resistor, a twelfth resistor, a fifth capacitor, a sixth capacitor and a seventh capacitor, the second transformer and the third transformer each comprise a primary side and a secondary side, the turn ratio of the primary side and the secondary side of the second transformer is 200:1, the turn ratio of the primary side and the secondary side of the third transformer is 16:2, and the second rectifier bridge and the third rectifier bridge each comprise 2 diodes;

the input end of the second rectifier bridge is connected with one end of the secondary side of the third transformer, one end of an eleventh resistor is connected with a connection node between the input end of the second rectifier bridge and the secondary side of the third transformer, the other end of the eleventh resistor is connected with one end of a sixth capacitor, the other end of the sixth capacitor is connected with the output end of the second rectifier bridge, the input end of the third rectifier bridge is connected with the other end of the secondary side of the third transformer, one end of a twelfth resistor is connected with a connection node between the input end of the third rectifier bridge and the secondary side of the third transformer, the other end of the twelfth resistor is connected with one end of a seventh capacitor, the other end of the seventh capacitor is connected with the output end of the third rectifier bridge, the output end of the second rectifier bridge is connected with the output end of the third rectifier bridge, and one ends of the ninth resistor and the tenth resistor are both connected with the cathode of the third high-speed switching diode, and the other ends of the ninth resistor and the tenth resistor are connected with the anode of a fourth high-speed switching diode.

6. The control circuit of the bead processing machine according to claim 5, wherein the control module includes a main control unit, a first adjustment unit, a second adjustment unit, a switch unit, a first operational amplification unit, and a second operational amplification unit, the first adjustment unit, the second adjustment unit, the switch unit, and the first operational amplification unit are all connected to the main control unit, the second operational amplification unit is connected to the switch unit, two ends of a secondary side of the first transformer are respectively connected to the first adjustment unit and the second adjustment unit, a cathode of a first high-speed switching diode of the sampling unit is connected to a cathode of a third high-speed switching diode and then to the second operational amplification unit, and a secondary side of the third transformer is connected to the first operational amplification unit through a feedback circuit.

7. The control circuit of the bead processing machine according to claim 6, wherein the control module is further connected with an overheat protection unit for protecting the control module, the overheat protection unit is provided with an adjustment port and a thermal switch interface, and the adjustment port and the thermal switch interface are both connected with the control module; the second rectifying module is also connected with a hand switch unit, and the hand switch unit is connected with the switch unit of the control module and used for manually controlling the switch; the first rectifying module is further connected with an auxiliary power supply module used for supplying power to the control module, and the auxiliary power supply module is electrically connected with the control module.

8. The control circuit of the bead processing machine according to claim 7, wherein the control circuit of the bead processing machine further includes a heat dissipation fan unit for dissipating heat and an indication unit for emitting light to indicate, the indication unit includes a power indicator and an abnormality indicator, and both the heat dissipation fan unit and the indication unit are electrically connected to the control module.

9. The control circuit of the bead processing machine according to claim 8, wherein the main control unit includes a main control chip, and the specific model of the main control chip is SG2525 AN; the first regulating unit comprises a first metal-oxide-semiconductor field effect transistor, a first TVS diode, a second TVS diode, a third diode, a thirteenth resistor, a fourteenth resistor, an eighth capacitor and a ninth capacitor, the second regulating unit comprises a second metal-oxide-semiconductor field effect transistor, a third TVS diode, a fourth diode, a fifteenth resistor, a sixteenth resistor, a tenth capacitor and an eleventh capacitor, and the first metal-oxide-semiconductor field effect transistor and the second metal-oxide-semiconductor field effect transistor are both ECN603S in model; the switch unit comprises a third triode, a fourth triode, a fifth TVS diode, a seventeenth resistor and a twelfth capacitor;

the positive phase input end of the first operational amplifier is grounded, the secondary side of the third transformer is connected with the inverting input end of the first operational amplifier through a feedback circuit, one end of a thirteenth capacitor is connected with the inverting input end of the first operational amplifier, the other end of the thirteenth capacitor is connected with the output end of the first operational amplifier, one end of a fourteenth capacitor is connected with the inverting input end of the first operational amplifier, the other end of the fourteenth capacitor is connected with one end of an eighteenth resistor, the other end of the eighteenth resistor is connected with the output end of the first operational amplifier, the anode of the first light-emitting diode is connected with the output end of the first operational amplifier, the cathode of the first light-emitting diode is connected with the anode of the second light-emitting diode, the cathode of the second light-emitting diode is connected with the inverting input end of the first operational amplifier, and one end of the nineteenth resistor is connected with the cathode of the first, the other end of the nineteenth resistor is connected with one end of a fifteenth capacitor, the other end of the fifteenth capacitor is connected with the anode of a second light-emitting diode, one end of the twentieth resistor is connected with the cathode of a first light-emitting diode, the other end of the twentieth resistor is connected with an adjusting port of an overheating protection unit, one end of the twenty-first resistor is connected with the inverting input end of a first operational amplifier, the other end of the twenty-first resistor is connected with the cathode of a fifth diode, the anode of the fifth diode is connected with the collector of a fifth triode, one end of the sixteenth capacitor is connected with the cathode of a fifth diode, the other end of the sixteenth capacitor is connected with the emitter of the fifth triode, the emitter of the fifth triode is grounded, the base of the fifth triode is connected with one end of a twenty-second resistor, and the other end of the twenty-second resistor is connected with the output end of the first operational amplifier, one end of the twenty-third resistor is connected with the output end of the first operational amplifier, the other end of the twenty-third resistor is connected with the base electrode of the sixth triode, the emitting electrode of the sixth triode is grounded, the collecting electrode of the sixth triode is connected with the COMPN pin of the main control chip, one end of the twenty-fourth resistor is connected with the base electrode of the sixth triode, the other end of the twenty-fourth resistor is connected with the emitting electrode of the sixth triode, and the seventeenth capacitor is connected in parallel at two ends of the twenty-fourth resistor.

10. The control circuit of the bead processing machine according to claim 9, wherein the auxiliary power module comprises a power switch controller, a chip coupler, a fourth transformer, a first fast recovery diode, a second fast recovery diode, a sixth TVS diode, a seventh TVS diode, a second electrolytic capacitor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, a twenty-third capacitor;