CN101693321A - Wire feeding system of double-motor combined welding wire coordinating mechanism - Google Patents
Wire feeding system of double-motor combined welding wire coordinating mechanism Download PDFInfo
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- CN101693321A CN101693321A CN200910210701A CN200910210701A CN101693321A CN 101693321 A CN101693321 A CN 101693321A CN 200910210701 A CN200910210701 A CN 200910210701A CN 200910210701 A CN200910210701 A CN 200910210701A CN 101693321 A CN101693321 A CN 101693321A
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Abstract
The invention belongs to the field of welding devices, particularly relates to a wire feeding system of a double-motor combined welding wire coordinating mechanism. The wire feeding system specifically comprises an upper computer (1), an interface circuit (2), a push-pull wire motor control unit (3), a push-pull wire feeding servo motor unit (4), a welding wire coordinating mechanism (5), a push wire motor unit (6) and a PWM speed adjusting circuit (7), wherein the upper computer is connected with the push-pull wire motor control unit via the interface circuit and connected with the PWM speed adjusting circuit, and used for totally controlling the whole push-pull wire feeding system; the push-pull wire motor control unit is used for closed loop control of the push-pull wire feeding servo motor unit; the PWM speed adjusting circuit is used for driving and controlling the push wire motor unit; the welding wire coordinating mechanism is an intermediate link for connecting the push wire motor unit with the push-pull wire feeding servo motor unit. The wire feeding system is mainly combined with a digital welding power source and capable of realizing various welding technological methods based on high-frequency feed-draw welding wires.
Description
Technical field
The invention belongs to field of welding devices, be specifically related to the wire feed system that a kind of bi-motor cooperates welding wire coordination organization.
Background technology
Wire-feed motor is the basic equipment of consumable electrode welding, and the quality of wire-feed motor performance directly affects the stability of welding process.Usually complete wire feed system is made up of two parts---mechanical part (comprising drive motors and mechanical driving device) and control circuit.In order to adapt to the requirement of different welding processes, along with Development of Welding Technology, propelling movement type has appearred successively, push-pull type and plug-type wire feeder.Entered since 20th century the eighties, at how reducing wire-feeder resistance and solution such as technological problemses such as molten drop pressures, the research of push-and-pull wire feeder has obtained many-sided achievement.Generally speaking, the push-and-pull wire feeder roughly can reduce two kinds of forms at present: a kind of is originally to study more mechanical structure, and its version is various.This class push-and-pull wire feed system complex structure, machinery inertial is bigger, can't realize that welding wire is high-frequency to send to-pumpback, and its collet segment wearing and tearing are very fast in addition, need periodic replacement, and regular maintenance and maintenance load are big.Another kind is the direct change drive-type structure that adopts high-performance motor and corresponding control approach to realize, representative is the push-and-pull wire feed system that adopts stepper motor.20th century 80, the nineties, stepper motor is widely used in welding field.Stepper motor is the open loop control element that electric impulse signal is changed into angular displacement or displacement of the lines.Under the situation of non-overload, the frequency and the umber of pulse of pulse signal are only depended in rotating speed of motor, the position that stops, and are not subjected to the influence of load variations, promptly add a pulse signal to motor, and motor then turns over a step angle.The existence of this linear relationship adds that stepper motor has only periodic error and do not have characteristics such as accumulated error, makes and controls the very simple of change in control fields such as speed, positions with stepper motor.In order to match with the droplet transfer process better, the dynamic responding speed of push-and-pull wire feed short circuit transition welding termination process butt welding silk requires very high, and stepper motor moment of torsion when high speed rotating can descend thereupon, and when higher pulse frequency, can occur losing the step, make this method under the sending to of lower welding wire-pumpback frequency, to weld, be difficult to practical application.
Summary of the invention
Technical problem to be solved by this invention provides a kind of digitlization push-and-pull wire feed system, and welding wire can be sent to-pumpback under higher frequency (reaching as high as 90Hz) in real time, sends to-requirement of the welding technique of pumpback to satisfy based on the welding wire high frequency.
A kind of bi-motor cooperates the wire feed system of welding wire coordination organization, comprises host computer 1, interface circuit 2, push-and-pull silk motor control unit 3, push-and-pull wire feed servomotor unit 4, welding wire coordination organization 5, pushes away an electric motor units 6, PWM alignment circuit 7.
Described host computer 1 can be PC or embedded control systems such as DSP, MCU.
Described push-and-pull wire feed servomotor unit 4 is actually the gas metal-arc welding welding gun that a cover is equipped with push-and-pull silk servomotor; mainly comprise welding gun part, push-and-pull silk servomotor, be fixed on wire feed rolls, silk pressing wheel and pressing handle on the motor shaft, as shown in Figure 2.Match by active wire feed rolls and the silk pressing wheel that is assemblied on the servo motor shaft, realize that the high frequency of welding wire is sent to and pumpback, the mode that this employing motor shaft directly drives has significantly improved the dynamic response capability and the wire feed precision of wire feeder.For guaranteeing that the silk pressing wheel has enough thrusts to reduce the relative slip between wire feed rolls and the welding wire, native system adopts the mode of two pressing handles to increase thrust.
Described push-and-pull silk motor control unit 3 comprises the special-purpose motion control card that has DSP or MCU, can accurately control position, speed, acceleration, the torque of push-and-pull silk servomotor unit 4 by motor servo driver, to reach the requirement of welding procedure.The motion employing of push-and-pull wire feeding motor and the mode of welding process Collaborative Control, promptly motion control card sends signal according to welded condition by host computer and controls the startup of welding wire, stops and state switches.In order to guarantee system's operate as normal, adopt interface circuit 2 that welding signal and motion control card are connected.Interface circuit is as shown in Figure 3: the Signal-in among the figure is the output signal of host computer, also is the input signal of interface circuit, comprises that guard signal, welding gun signal, striking judge signal.Signal-Out is the output signal of these signal correspondences, and it will directly link to each other with motion control card, triggers the motion of welding wire.
The described electric motor units 6 that pushes away adopts the general wire-feed motor of gas metal-arc welding, and its effect is to send welding wire according to welding conditions with constant speed.Because native system is very strict to the requirement of wire feed rate, therefore install rotary encoder additional pushing away on the motor shaft, motor speed is fed back to the PWM alignment circuit be complementary to guarantee the wire feed rate and the push-and-pull silk motor that push away a motor.Rotary encoder outputs to PWM alignment circuit 7 with pulse, and the PWM alignment circuit is the control core with the dsp chip, the pulse of input is counted, and compared with setting value, and after calculating by the PI control algolithm, the PWM waveform that output is corresponding drives and pushes away a motor movement.
Described welding wire coordination structure 5 as shown in Figure 4, it is the bridge of two wire feeding motors contacts, can make the constant-speed wire-feeding part can send welding wire stably forward to two parts wire feed organically in conjunction with as a whole by welding wire coordination organization.In welding wire coordination organization, the wire convey soft pipe of two can feel relieved rotation and form an angle (60-120 degree) is housed, welding wire is forced bending to have a certain degree by two flexible pipes, thereby the push-and-pull wire-feeding part is sent to-the pumpback welding wire fast with very high frequency.In addition, the scope of activities of two photoelectricity travel switches in order to the restriction welding wire is housed also in the welding wire coordination organization, when the welding wire break bounds in the welding wire coordination organization, just compensated by improving or reduce the speed that pushes away a motor.
The present invention has following beneficial effect:
1, system adopts control accuracy height, fireballing motion control card little to rotary inertia, and the fast high-performance AC servo motor of response speed is controlled, thus realize welding wire high-frequency, send-pumpback working stability in real time to.
2, welding wire coordination organization will push away silk part and push-and-pull silk AC servo motor organically in conjunction with as a whole, and it is smooth and easy that welding wire is sent to.
3, based on the degenerative PWM governing system of encoder rotating speed, directly control, both can compensating load change the rotation speed change that causes, the rotation speed change that again can the compensation network voltage pulsation causes pushing away a motor speed, make system's antijamming capability strong, wire feed is stable.
Description of drawings
Fig. 1 is a push-and-pull wire feed system structured flowchart
Fig. 2 is the structure chart of push-and-pull silk rifle
Fig. 3 is the isolating interface circuit diagram that welding signal and motion control card communicate
Fig. 4 is the structure chart of welding wire coordination organization
Fig. 5 is the motion schematic diagram of welding wire coordination organization
The specific embodiment
Now embodiments of the present invention are specifically described by an instantiation.
The BLS40 three-phase synchronous precise AC servo motor that push-and-pull wire feed servomotor selects for use Spain Ma Weinuo company to produce, motion control card adopts the PMAC2-PC104 motion control card of U.S. Delta Tau company.
During the welding beginning, receive behind the signal that welding gun presses that host computer 1 sends wire feed rate to PWM alignment circuit 7 and motion control card and begins the wire feed striking, after the striking success, push away a motor 6 and send welding wire to constant speed, motion control card drives the motion of push-and-pull silk motor positive and inverse according to the welded condition signal that receives, and welding wire is sent to or pumpback.Because push-and-pull silk motor constantly repeats to send to-process of pumpback, send state to and push away the another straight maintenance of a motor, therefore, push-and-pull silk motor when the pumpback welding wire will inevitably with push away sending to of a motor and clash, welding wire coordination organization 5 is then with solving this contradiction, because in welding wire coordination organization, welding wire is bent to certain angle (60-120 degree), reduced wire-feeder resistance, thereby the push-and-pull wire-feeding part is sent to-the pumpback welding wire fast with very high frequency the push-and-pull wire-feeding part.Welding wire coordination organization 5 can guarantee that welding wire has enough remainings to send to-pumpback, the concrete motion process of welding wire is as shown in Figure 5: the C point keeps certain speed to send to forward during wire feed, when A point welding wire is sent at a high speed, welding wire coordination organization B point moves down, to replenish the not difference of silk feeding quantity simultaneously of A, C two spot speed; In like manner, during the pumpback of A point welding wire high speed, move on the B point, make the surplus welding wire that goes out be retained in buffer inside to guarantee normally sending to of welding wire next time.Studies show that, take all factors into consideration under welding wire elasticity and the wire convey soft pipe friction situation, when two wire convey soft pipes become 90 to spend, the wire-feeder resistance minimum, therefore, in the wire feed process, should keep in the welding wire coordination organization two wire convey soft pipe angles about 90 degree as far as possible, though two parts wire feed unit all possesses perfect rate feedback system, but always there is minute differences in the wire feed rate of two wire feed systems, long-time continual welding can cause the accumulation of this difference, therefore, the scope of activities of two photoelectricity travel switches in order to the restriction welding wire also is housed, in the welding wire coordination organization when the welding wire break bounds in the welding wire coordination organization, just compensated by improving or reduce the speed that pushes away a motor, make welding wire get back to suitable position.
Native system has guaranteed that not only stable, the harmony of two parts wire feed unit send to, can effectively avoid again because the welding wire bending that the motion of high frequency push-and-pull silk causes, thereby cause the plug wire phenomenon.
Claims (7)
1. a bi-motor cooperates the wire feed system of welding wire coordination organization, include host computer (1), interface circuit (2), push-and-pull silk motor control unit (3), push-and-pull wire feed servomotor unit (4), welding wire coordination organization (5), push away an electric motor units (6), PWM alignment circuit (7), it is characterized in that: described host computer (1) is connected with push-and-pull silk motor control unit (3) by interface circuit (2), and be connected with PWM alignment circuit (7), be used for whole push-and-pull wire feed system is controlled, push-and-pull silk motor control unit (3) is by carrying out closed-loop control to push-and-pull wire feed servomotor unit (4), PWM alignment circuit (7) drives and controls pushing away an electric motor units (6), and welding wire coordination organization (5) connects the intermediate link that pushes away an electric motor units (6) and push-and-pull wire feed servomotor unit (4).
2. a kind of bi-motor according to claim 1 cooperates the wire feed system of welding wire coordination organization, it is characterized in that: described host computer (1) can be PC or DSP, MCU embedded control system.
3. a kind of bi-motor according to claim 1 cooperates the wire feed system of welding wire coordination organization; it is characterized in that: described push-and-pull wire feed servomotor unit (4) is the device that a gas metal-arc welding welding gun combines with push-and-pull silk servomotor; send to and pumpback by the active wire feed rolls rotating campaign drive welding wire that is assemblied on the servo motor shaft, and by the thrust between silk pressing wheel cooperation hold down gag adjusting wire feed rolls and the silk pressing wheel.
4. a kind of bi-motor according to claim 1 cooperates the wire feed system of welding wire coordination organization, it is characterized in that: described push-and-pull silk motor control unit (3) comprises the special-purpose motion control card that has DSP or MCU, by motor servo driver position, speed, acceleration, the torque of push-and-pull silk servomotor unit (4) are accurately controlled, reached the requirement of welding procedure.
5. a kind of bi-motor according to claim 1 cooperates the wire feed system of welding wire coordination organization, it is characterized in that: the described electric motor units (6) that pushes away is direct current generator and be aided with reducing gear, and installs in order to export the pulse frequency rotary encoder of current rotating speed correspondence on motor output shaft.
6. a kind of bi-motor according to claim 5 cooperates the wire feed system of welding wire coordination organization, it is characterized in that: the pulse frequency of described rotary encoder output, be input to PWM alignment circuit (7), the PWM alignment circuit is the control core with the dsp chip, pulse to input is counted, and compares with setting value, after calculating by the PI control algolithm, the PWM waveform that output is corresponding drives and pushes away a motor movement.
7. a kind of bi-motor according to claim 1 cooperates the wire feed system of welding wire coordination organization, it is characterized in that: described welding wire coordination structure (5) is to connect push-and-pull wire feeding motor unit (4) and push away the device of an electric motor units (6), send the pumpback campaign to cushion space is provided with thinking welding wire, reduce the wire-feeder resistance of push-and-pull wire feed simultaneously, in addition, described welding wire coordination organization (5) also possesses two position switch, is used for the situation that the fine difference accumulative total because of two inconsistent generations of motor speed causes welding wire to exceed the working range of mechanism is coordinated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009102107017A CN101693321B (en) | 2009-11-06 | 2009-11-06 | Wire feeding system of double-motor combined welding wire coordinating mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102107017A CN101693321B (en) | 2009-11-06 | 2009-11-06 | Wire feeding system of double-motor combined welding wire coordinating mechanism |
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| CN101693321A true CN101693321A (en) | 2010-04-14 |
| CN101693321B CN101693321B (en) | 2011-07-20 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639605A (en) * | 2013-11-28 | 2014-03-19 | 上海航天精密机械研究所 | Novel Plasma-MIG (metal-inert gas) hybrid welding wire feeding mechanism and control method thereof |
| CN105127554A (en) * | 2015-09-08 | 2015-12-09 | 刘文斌 | Wire feeding method for welding wires |
| CN105149745A (en) * | 2015-09-23 | 2015-12-16 | 成都电焊机研究所 | Design of movement patterns of servo motor for consumable gas shield welding |
| CN106891080A (en) * | 2017-04-20 | 2017-06-27 | 唐山松下产业机器有限公司 | The wire feed control system and method for many motors |
| CN108296607A (en) * | 2018-01-30 | 2018-07-20 | 哈尔滨工业大学（威海） | A kind of programmable pulse wire feed control system |
| CN109304531A (en) * | 2018-11-20 | 2019-02-05 | 唐山松下产业机器有限公司 | Weld time sequence synchronous control method |
| CN109530982A (en) * | 2018-10-30 | 2019-03-29 | 上海沪工焊接集团股份有限公司 | A kind of digitalization control method of wire-feed motor |
| CN111299771A (en) * | 2020-03-23 | 2020-06-19 | 深圳市麦格米特焊接技术有限公司 | Wire pushing motor control method, controller, control circuit and wire feeding system |
| CN113020753A (en) * | 2020-12-16 | 2021-06-25 | 中国石油大学(华东) | Novel double-cam push-pull wire electric arc additive manufacturing device |
| CN115464240A (en) * | 2022-09-30 | 2022-12-13 | 广州数控设备有限公司 | Differential value composite wire feeding control method and device, computer equipment and storage medium |
Family Cites Families (4)
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| CN100553109C (en) * | 2006-04-07 | 2009-10-21 | 唐山松下产业机器有限公司 | Wire feed speed regulating method and wire feed speed regulating system |
| CN100429030C (en) * | 2006-12-01 | 2008-10-29 | 北京工业大学 | Arc welding system and method with low energy input |
| CN201183166Y (en) * | 2008-01-02 | 2009-01-21 | 杭州凯尔达电焊机有限公司 | Electric arc electrode feeding machine |
| CN201559015U (en) * | 2009-11-06 | 2010-08-25 | 北京工业大学 | Wire feed system with double motors to cooperate with welding wire coordinating agency |
-
2009
- 2009-11-06 CN CN2009102107017A patent/CN101693321B/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639605A (en) * | 2013-11-28 | 2014-03-19 | 上海航天精密机械研究所 | Novel Plasma-MIG (metal-inert gas) hybrid welding wire feeding mechanism and control method thereof |
| CN105127554A (en) * | 2015-09-08 | 2015-12-09 | 刘文斌 | Wire feeding method for welding wires |
| CN105149745A (en) * | 2015-09-23 | 2015-12-16 | 成都电焊机研究所 | Design of movement patterns of servo motor for consumable gas shield welding |
| CN106891080A (en) * | 2017-04-20 | 2017-06-27 | 唐山松下产业机器有限公司 | The wire feed control system and method for many motors |
| CN108296607A (en) * | 2018-01-30 | 2018-07-20 | 哈尔滨工业大学（威海） | A kind of programmable pulse wire feed control system |
| CN109530982A (en) * | 2018-10-30 | 2019-03-29 | 上海沪工焊接集团股份有限公司 | A kind of digitalization control method of wire-feed motor |
| CN109304531A (en) * | 2018-11-20 | 2019-02-05 | 唐山松下产业机器有限公司 | Weld time sequence synchronous control method |
| CN111299771A (en) * | 2020-03-23 | 2020-06-19 | 深圳市麦格米特焊接技术有限公司 | Wire pushing motor control method, controller, control circuit and wire feeding system |
| CN111299771B (en) * | 2020-03-23 | 2021-09-28 | 深圳市麦格米特焊接技术有限公司 | Push-pull wire motor control method, controller, control circuit and wire feeding system |
| CN113020753A (en) * | 2020-12-16 | 2021-06-25 | 中国石油大学(华东) | Novel double-cam push-pull wire electric arc additive manufacturing device |
| CN115464240A (en) * | 2022-09-30 | 2022-12-13 | 广州数控设备有限公司 | Differential value composite wire feeding control method and device, computer equipment and storage medium |
| CN115464240B (en) * | 2022-09-30 | 2023-10-13 | 广州数控设备有限公司 | Differential value composite wire feeding control method and device, computer equipment and storage medium |
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Granted publication date: 20110720 Termination date: 20121106 |