CN203956306U - For the anti-blocking anti-breaking control circuit of welding wire of welding equipment - Google Patents
For the anti-blocking anti-breaking control circuit of welding wire of welding equipment Download PDFInfo
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- CN203956306U CN203956306U CN201420388730.9U CN201420388730U CN203956306U CN 203956306 U CN203956306 U CN 203956306U CN 201420388730 U CN201420388730 U CN 201420388730U CN 203956306 U CN203956306 U CN 203956306U
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Abstract
The utility model discloses the anti-blocking anti-breaking control circuit of a kind of welding wire for welding equipment, for controlling the start and stop of wire-feed motor, the electrode input end of wire-feed motor is connected with the positive pole of dc source with after speed control circuit series connection, the driving signal of speed control circuit comprises pwm signal, the anti-blocking anti-breaking control circuit of welding wire comprises the first resistance～eight resistance, electric capacity, triode, comparator and with door, these elements form respectively wire-feed motor electric current real-time sampling circuit, sample rate current and setting current comparison circuit, decision circuitry, finally control start and stop and the speed of wire-feed motor.The electric current that the utility model flows through wire-feed motor by detection judges the size of current wire-feeder resistance, in the time that being greater than setting value, wire-feeder resistance can stop in time wire feed, thereby avoid welding wire even to fracture because of the excessive flexural deformation of resistance, workload and the time of welding personnel cleaning distortion welding wire are reduced, also saved cost, improved production efficiency simultaneously.
Description
Technical field
The utility model relates to a kind of control circuit for welding equipment, relates in particular to the anti-blocking anti-breaking control circuit of a kind of welding wire for semi-automatic welding equipment.
Background technology
At present, a large amount of semi-automatic welding equipments that use in Chinese engineering construction, this equipment is made up of the source of welding current, wire-feed motor and welding gun three parts; And wire-feed motor mostly adopts and pushes away a mode wire feed, welding wire is promoted by the wire feed rolls in wire-feed motor, delivers to ignition tip through the wire convey soft pipe of welding gun, then through arc-melting in molten bath.This wire feeding mode is simple in structure, easy to operate.Power input and the speed control circuit of existing wire-feed motor are connected in series, and the driving signal of speed control circuit is pwm signal, and speed control circuit is exported corresponding voltage according to pwm signal, control the wire feed rate of wire-feed motor.
In actual welding application, many or while damaging if that welding gun, wire-feed motor, gooseneck or ignition tip connect is improper, welding torch cable bending diameter is too little, wire convey soft pipe is aging, ignition tip splashes, all can cause wire-feeder resistance to become large.And for pushing away a welding manner, in order to ensure the uniformity of wire feed rate, in the time that the resistance in front becomes large, wire feeding circuit can increase the dynamics that pushes away silk, allow welding wire forward impelling, will cause like this welding wire at wire feed rolls place, the local flexural deformation such as welding gun and wire-feed motor central socket place or wire convey soft pipe, get lodged in these local or welding wires that fractures, the more serious wire convey soft pipe that also can make damages.When occurring that after plug wire or fracture of wire, welding operator has to welding gun to remove from wire-feed motor, finds plug wire or circuit wire position, after cleaning, reinstall welding wire and could continue normal welding, increase like this operator's workload, wasted time and welding wire, reduced production efficiency.
At present still there is no to prevent that the circuit of welding wire plug wire or fracture of wire or other device from can address the above problem.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem a kind of welding wire for welding equipment anti-blocking anti-breaking control circuit.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The anti-blocking anti-breaking control circuit of a kind of welding wire for welding equipment, for controlling the start and stop of wire-feed motor, the electrode input end of described wire-feed motor is connected with the positive pole of dc source with after speed control circuit series connection, the driving signal of described speed control circuit comprises pwm signal, the anti-blocking anti-breaking control circuit of described welding wire comprises the first resistance～eight resistance, electric capacity, triode, comparator and with door, the negative input of described wire-feed motor is connected with the first end of described the first resistance, the first end of described the first resistance is connected with the first end of described electric capacity and the first end of described the second resistance respectively, the second end of described the second resistance is connected with the first end of described the 3rd resistance and the signal input part to be compared of described comparator respectively, the first end of the first end of described the 4th resistance and described the 5th resistance is connected with the reference signal input of described comparator simultaneously, the output of described comparator is connected with the first end of described the 6th resistance and the first end of described the 7th resistance respectively, the second end of described the 7th resistance is connected with the base stage of described triode, the colelctor electrode of described triode is respectively with the first end of described the 8th resistance be describedly connected with the first signal input of door, described pwm signal is connected with the secondary signal input of door with described, described with door output be connected with the driving input of described speed control circuit, the second end of described the 5th resistance, the second end of described the 6th resistance, the second end of described the 8th resistance and the cathode power supply input of described comparator are all connected with the positive pole of described dc source, the second end of described the first resistance, the second end of described electric capacity, the second end of described the 3rd resistance, the second end of described the 4th resistance, the negative power supply input of described comparator and the emitter stage of described triode are all connected with the negative pole of described dc source.
The mentality of designing of foregoing circuit is as follows: want to prevent welding wire plug wire or fracture of wire, just must, in the time that wire-feeder resistance is greater than certain value, stop wire feed, make welding wire be unlikely to flexural deformation.Because the hardness of various welding wires is inconsistent, can cause the power of this wire bending distortion also different, this just requires for different welding wires, and the wire-feeder resistance reference value of setting is different.Because wire-feeder resistance is corresponding with the electric current of wire-feed motor, wire-feeder resistance is larger, the electric current of corresponding wire-feed motor is also larger, so the utility model is by the electric current of the first electrical resistance collection wire-feed motor, and this electric current and setting current value are contrasted, current value when the setting current value is here out of shape or fractures with wire bending is corresponding, realize variation by the resistance that changes the 4th resistance and the 5th resistance, after comparator compares collection electric current and setting electric current, break-make and the output of its output control triode, triode output signal and pwm signal by with Men Xiangyu after as drive signal give speed control circuit, control wire-feed motor and press the speed wire feed of pwm signal control, or out of service, suspend wire feed.
The beneficial effects of the utility model are:
The electric current that the utility model flows through wire-feed motor by detection judges the size of current wire-feeder resistance, in the time that being greater than setting value, wire-feeder resistance can stop in time wire feed, thereby avoid welding wire even to fracture because of the excessive flexural deformation of resistance, workload and the time of welding personnel cleaning distortion welding wire are reduced, also saved cost, improved production efficiency simultaneously; No matter be occur welding gun, wire-feed motor, gooseneck or ignition tip connect improper, welding torch cable bending diameter is too little, or aging, the ignition tip of the wire convey soft pipe situations such as many or damage of splashing, as long as cause wire-feeder resistance to change, the utility model just can be realized the anti-blocking anti-breaking function of welding wire, so detect accurately, it is convenient to control.
Brief description of the drawings
Fig. 1 is the circuit diagram of the anti-blocking anti-breaking control circuit of welding wire for welding equipment described in the utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the anti-blocking anti-breaking control circuit of welding wire for welding equipment described in the utility model, for controlling the start and stop of wire-feed motor (not shown), the electrode input end of wire-feed motor is connected with the positive pole of 15V dc source with after the series connection of speed control circuit (not shown), the driving signal of speed control circuit comprises pwm signal, the anti-blocking anti-breaking control circuit of described welding wire comprises the first resistance R 1～eight resistance R 8, capacitor C, triode, comparator U1 and with door U2, the negative input of wire-feed motor is connected with the first end of the first resistance R 1, the first end of the first resistance R 1 is connected with the first end of capacitor C and the first end of the second resistance R 2 respectively, the second end of the second resistance R 2 is connected with the first end of the 3rd resistance R 3 and the signal input part to be compared of comparator U1 respectively, the first end of the first end of the 4th resistance R 4 and the 5th resistance R 5 is connected with the reference signal input of comparator U1 simultaneously, the output of comparator U1 is connected with the first end of the 6th resistance R 6 and the first end of the 7th resistance R 7 respectively, the second end of the 7th resistance R 7 is connected with the base stage of triode Q, the colelctor electrode of triode Q is connected with the first end of the 8th resistance R 8 with the first signal input of door U2 respectively, pwm signal be connected with the secondary signal input of door U2, be connected with the output of door U2 and the driving input of speed control circuit, the second end of the 5th resistance R 5, the second end of the 6th resistance R 6, the second end of the 8th resistance R 8 is all connected with the positive pole of 15V dc source with the cathode power supply input of comparator U1, the second end of the first resistance R 1, the second end of capacitor C, the second end of the 3rd resistance R 3, the second end of the 4th resistance R 4, the negative power supply input of comparator U1 is all connected with the negative pole of 15V dc source with the emitter stage of triode Q.
As shown in Figure 1, the first resistance R 1 and speed control circuit are all the power inputs that are connected on wire-feed motor, the first resistance R 1 gathers the real work electric current of wire-feed motor the input Ui as this control circuit, this voltage signal is transferred to the signal input part to be compared of comparator U1, the 4th resistance R 4 is connected with 15V dc source with the 5th resistance R 5, its resistance size has determined the reference voltage size of comparator U1, also determined the output voltage size of comparator U1, and final decision with the voltage swing of the output Uo of door U2, thereby Negotiation speed control circuit has been realized start and stop and speed control to wire-feed motor.
Below circuit structure of the present utility model is done more specifically to describe:
As shown in Figure 1, owing to flowing through, the electric current of the first resistance R 1 is larger, selects so the first resistance R 1 is general the resistance that resistance is less, power is larger; Capacitor C 1 is filter capacitor, can value 0.1uF, the second resistance R 2 and the 3rd resistance R 3 form bleeder circuit, because the hardness of all kinds and diameter welding wire is inconsistent, can be according to different welding wires, regulate the value of the second resistance R 2 and the 3rd resistance R 3 to select different partial pressure value.The setting current value that the 4th resistance R 4 and the 5th resistance R 5 are out of shape or are fractureed for wire bending, this value also can regulate according to different welding wires; The current value that comparator U1 sets with the 4th resistance R 4 and the 5th resistance R 5 the wire feed current value feeding back through the first resistance R 1 compares, if feedback current value is large, just export high level at the output of comparator U1, otherwise with regard to output low level, because comparator U1 inside does not have pull-up resistor, thus in the output termination of comparator U1 the 6th resistance R 6 as pull-up resistor.The 7th resistance R 7, the 8th resistance R 8, triode Q and stop a circuit with door U2 composition, triode Q is NPN type triode, with door U2 be two inputs and door, be connected to the driving input of the speed control circuit of wire-feed motor with the output Uo of door U2.If the output of comparator U1 output high level, triode Q conducting, is pulled down to zero with the first signal input of door U2, and U2 is output as zero with door, and the driving of speed control circuit is input as zero, and wire-feed motor opens circuit out of service, and welding wire also halts; If the output output low level of comparator U1, not conducting of triode Q, drawn high high level with the first signal output of door U2 by the 8th resistance R 8, by with door U2 and pwm signal phase with, output is still pwm signal, being that wire-feed motor is normal moves and does not change original speed control method, and welding wire normally advances.Guarantee that like this, after the large trouble shooting of wire-feeder resistance, welding wire can recover normal wire feed state automatically.
In the utility model, prevent that wire bending distortion or the setting electric current fractureing from will select suitable value, if select too little, welding gun is in the time that slight curvature or ignition tip have a little to splash, control circuit described in the utility model will be judged as possibility plug wire/fracture of wire and stop wire feed, continuity and the effect of impact welding; If but selection is too large, may occur flexural deformation of welding wire or fracture, control circuit described in the utility model is also judged as normal wire feed state, and does not reach anti-blocking anti-breaking object.So in actual applications, will be according to on-the-spot environment for use, the type of welding wire is determined the wire-feeder resistance scope allowing, the wire-feeder resistance overcoming at needs and prevent that wire bending from finding an equalization point between fractureing, the problem should be noted that when this is this circuit application, the problem that the 4th resistance R 4 and the 5th resistance R 5 resistances are selected.
Above circuit is preferred circuit of the present utility model, is convenient to these those skilled in the art and can understands and apply the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, can also make without departing from the concept of the premise utility some simple deduction or replace, and needn't pass through performing creative labour.Therefore, those skilled in the art are according to announcement of the present utility model, and the simple modifications that the utility model is made all should be within protection domain of the present utility model.
Claims (1)
1. the anti-blocking anti-breaking control circuit of the welding wire for welding equipment, for controlling the start and stop of wire-feed motor, the electrode input end of described wire-feed motor is connected with the positive pole of dc source with after speed control circuit series connection, the driving signal of described speed control circuit comprises pwm signal, it is characterized in that: the anti-blocking anti-breaking control circuit of described welding wire comprises the first resistance～eight resistance, electric capacity, triode, comparator and with door, the negative input of described wire-feed motor is connected with the first end of described the first resistance, the first end of described the first resistance is connected with the first end of described electric capacity and the first end of described the second resistance respectively, the second end of described the second resistance is connected with the first end of described the 3rd resistance and the signal input part to be compared of described comparator respectively, the first end of the first end of described the 4th resistance and described the 5th resistance is connected with the reference signal input of described comparator simultaneously, the output of described comparator is connected with the first end of described the 6th resistance and the first end of described the 7th resistance respectively, the second end of described the 7th resistance is connected with the base stage of described triode, the colelctor electrode of described triode is respectively with the first end of described the 8th resistance be describedly connected with the first signal input of door, described pwm signal is connected with the secondary signal input of door with described, described with door output be connected with the driving input of described speed control circuit, the second end of described the 5th resistance, the second end of described the 6th resistance, the second end of described the 8th resistance and the cathode power supply input of described comparator are all connected with the positive pole of described dc source, the second end of described the first resistance, the second end of described electric capacity, the second end of described the 3rd resistance, the second end of described the 4th resistance, the negative power supply input of described comparator and the emitter stage of described triode are all connected with the negative pole of described dc source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420388730.9U CN203956306U (en) | 2014-07-14 | 2014-07-14 | For the anti-blocking anti-breaking control circuit of welding wire of welding equipment |
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| CN201420388730.9U CN203956306U (en) | 2014-07-14 | 2014-07-14 | For the anti-blocking anti-breaking control circuit of welding wire of welding equipment |
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| CN203956306U true CN203956306U (en) | 2014-11-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105965128A (en) * | 2015-03-10 | 2016-09-28 | 发那科株式会社 | Welding robot monitoring feedability of welding wire |
| CN113732451A (en) * | 2021-09-22 | 2021-12-03 | 唐山松下产业机器有限公司 | Welding method and system, electronic device, and storage medium |
| CN117206635A (en) * | 2023-10-12 | 2023-12-12 | 泰州市巨久不锈钢有限公司 | Wire feeding system for stainless steel welding |
-
2014
- 2014-07-14 CN CN201420388730.9U patent/CN203956306U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105965128A (en) * | 2015-03-10 | 2016-09-28 | 发那科株式会社 | Welding robot monitoring feedability of welding wire |
| CN105965128B (en) * | 2015-03-10 | 2019-01-15 | 发那科株式会社 | Monitor the welding robot of the feeding of welding wire |
| CN113732451A (en) * | 2021-09-22 | 2021-12-03 | 唐山松下产业机器有限公司 | Welding method and system, electronic device, and storage medium |
| CN117206635A (en) * | 2023-10-12 | 2023-12-12 | 泰州市巨久不锈钢有限公司 | Wire feeding system for stainless steel welding |
| CN117206635B (en) * | 2023-10-12 | 2024-03-19 | 泰州市巨久不锈钢有限公司 | Wire feeding system for stainless steel welding |
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