CN100335222C - Control of removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding - Google Patents
Control of removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding Download PDFInfo
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- CN100335222C CN100335222C CNB2005100277123A CN200510027712A CN100335222C CN 100335222 C CN100335222 C CN 100335222C CN B2005100277123 A CNB2005100277123 A CN B2005100277123A CN 200510027712 A CN200510027712 A CN 200510027712A CN 100335222 C CN100335222 C CN 100335222C
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Abstract
The present invention relates to a control method for removing pellets by successive pulse burn-back voltage in melting polaric gas protection electric arc welding, which belongs to the technical field of welding. The present invention adopts the following procedures: a welding stage ends, a burn-back stage is entered, and at this point, a wire feeding system stops; however, due to inertia, a welding wire which does not stop to be fed in continues to be fed toward a workpiece according to the inertia, namely, the burn-back wire feeding speed, and the inertia enables the welding wire to advance until contacting the workpiece; when the successive pulse burn-back voltage appears, the welding wire which receives high-density energy is rapidly melted and exploded so that the welding wire and the workpiece are separated due to the sudden increase of contact current between the welding wire and the workpiece, an electric arc immediately disappears or maintains the time when the voltage is in a peak value in a successive pulse period, and the welding wire continues to be fed in toward the workpiece according to the inertia, namely, the burn-back wire feeding speed; the process is repeated until the burn-back wire feeding speed is equal to zero; the burn-back stage ends, and a welding waiting stage is entered. The present invention solves the problem always existing in the process of burn back that the electric arc melts the tail end of the welding wire, and thereby, the present invention achieves optimal pellet removing effect.
Description
Technical field
What the present invention relates to is a kind of method of welding technology field, specifically, is a kind of control method of removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding.
Background technology
Wire feed system stopped when the molten electrode protected by gas arc welding finished in welding process; but because the action of inertia welding wire continues to send into the adhesion that causes welding wire and workpiece to workpiece; for preventing that adhesion from generally finishing the back in welding process and having the process stage that flashes back; in the stage wire tip of flashing back owing to the existence of electric arc is melted; under capillary effect, retract into spherically, have the bead influence arcing initiation success rate of welding next time thereby welding finishes wire tip.
Find that by prior art documents Han Debin writes articles " arcing initiation success rate that improves welding machine " on " Tohoku Electric Power technology " 1994 (8), adopt the best voltage that flashes back to reach the purpose of bead in the literary composition.The Cheng Tao ripple is in " robot ", write articles " research that arch problem is received in the starting the arc among the robot welding system " on 1998 (11), Wen Zhongcong reduces the angle of energy and sets out, adopt wire feed rate to begin decay simultaneously by different separately attenuation degrees, electric arc is progressively disappeared in short circuiting transfer arrive the purpose of removing bead with arc voltage.Above method is direct current voltage or the decaying dc voltage that flashes back that flashes back, therefore there be the fusing of electric arc all the time in the process of flashing back to wire tip, can't reach the best and go the bead effect, in addition, direct current voltage or the decaying dc voltage that flashes back that flashes back needs to change with the variation of welding variables, the adaptability of removing bead a little less than.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art part; a kind of control method of removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding is provided; it has been solved have the fusing problem of electric arc in the process of flashing back all the time wire tip; the size of continuous impulse voltage and welding variables are irrelevant simultaneously, and adaptability is stronger.
The present invention is achieved by the following technical solutions, the present invention adopts the welding stage to finish to enter the stage of flashing back, this moment, wire feed system stopped, but because the inertia welding wire does not stop to send to, but press the inertia wire feed rate, the wire feed rate of promptly flashing back continues to send to workpiece, inertia advances to workpiece welding wire and contacts, when continuous impulse occurring and flash back voltage, because the pick-up current of welding wire and workpiece increases suddenly, welding wire receive high density energy and rapidly fusing produce quick-fried breaking welding wire separated with workpiece, electric arc disappear immediately or keep continuous impulse in the cycle voltage be in time of peak value, welding wire continues to press the inertia wire feed rate, the wire feed rate of promptly flashing back is sent to workpiece, repeats said process, and wire feed rate equals zero until flashing back, the stage of flashing back finishes, and the stage to be welded such as enters.
Described flashing back the stage, its time is controlled between 0.2 second and 1 second.
The described pulse voltage that flashes back is controlled between 50 volts and 60 volts.
In the described continuous impulse cycle, be controlled between 50 hertz and 200 hertz.
Described continuous impulse in the cycle voltage be in time of peak value, be controlled between 0.003 and 0.010 second.
The end of welding stage enters the stage of flashing back, stage wire feed control system is closed flashing back, but because thereby the machinery inertial welding wire of wire-feed motor is still sent the haircuts situation that causes to workpiece, therefore add the direct current voltage that flashes back in the stage of flashing back and solve the haircuts problem, but when welding wire with after workpiece separates if welding wire stops, thereby flash back this moment voltage still exist cause welding wire constantly heating form bead in wire tip, be unfavorable for striking again.The present invention adopts the continuous impulse voltage that flashes back to substitute traditional direct current voltage that flashes back, operation principle is as follows: the wire feed control system is closed, wire-feed motor inertia makes welding wire contact with workpiece, and the contact resistance heat that the appearance of pulse this moment makes the welding wire and the pick-up current of workpiece increase formation suddenly melts rapidly welding wire is separated with workpiece.It is can not grow up and played the purpose of removing bead in the welding wire end that arc extinction when pulse disappears, welding wire stop to melt.If this moment, welding wire still existed inertia that welding wire is contacted once more with workpiece, in the time of should pulse occurring once more together welding wire is separated with workpiece.Repeating said process stops until welding wire.After because pulse arc extinction when disappearing, be that electric current is zero even therefore occur the pulse electric arc that also can't ignite again, can not cause the heat fused of welding wire end, thus solved the stage of flashing back go the bead problem.
The present invention is through a large amount of tests, the ratio of the little bulb diameter of wire tip and gage of wire is less than 1.05, the present invention and tradition are flashed back, and to go the ball method to compare the ball effect obvious for voltage, solution is flashed back and is had the fusing problem of electric arc to wire tip all the time in the process, reach the best bead effect of going, the size of continuous impulse voltage and welding variables are irrelevant simultaneously, and adaptability is stronger.
The specific embodiment
Embodiment 1
1. the welding stage finishes to enter the stage of flashing back, this moment, wire feed system stopped, but because the inertia welding wire does not stop to send to, but press the inertia wire feed rate, the wire feed rate of promptly flashing back continues to send to workpiece, inertia advances to workpiece welding wire and contacts, when continuous impulse occurring and flash back voltage since the pick-up current of welding wire and workpiece increase suddenly, welding wire receive high density energy and rapidly fusing produce and quick-friedly disconnected welding wire separated with workpiece, electric arc disappear immediately or maintain continuous impulse in the cycle voltage be in time of peak value.
2. after this no longer produce electric arc before the short circuit second time, welding wire has also just stopped fusing, and promptly the welding wire end is difficult to grow up again, has played the purpose of removing bead like this.
3. welding wire continues to press the inertia wire feed rate, and the wire feed rate of promptly flashing back is sent to workpiece, and repeating step 1, step 2 process equal zero until the wire feed rate of flashing back, and the stage of flashing back finishes, and enters next welding stage of wait.
Described flashing back the stage, its time was controlled at 0.2 second.
The described pulse voltage that flashes back is controlled at 50 volts.
In the described continuous impulse cycle, be controlled at 50 hertz.
Described continuous impulse in the cycle voltage be in time of peak value, be controlled at 0.003 second.
The present invention and tradition are flashed back, and to go the ball method to compare the ball effect obvious for voltage, solution is flashed back and is had the fusing problem of electric arc to wire tip all the time in the process, reach the best bead effect of going, the size of continuous impulse voltage has nothing to do with welding variables simultaneously, and adaptability is stronger.
Embodiment 2
1. the welding stage finishes to enter the stage of flashing back, this moment, wire feed system stopped, but because the inertia welding wire does not stop to send to, but press the inertia wire feed rate, the wire feed rate of promptly flashing back continues to send to workpiece, inertia advances to workpiece welding wire and contacts, when continuous impulse occurring and flash back voltage since the pick-up current of welding wire and workpiece increase suddenly, welding wire receive high density energy and rapidly fusing produce and quick-friedly disconnected welding wire separated with workpiece, electric arc disappear immediately or maintain continuous impulse in the cycle voltage be in time of peak value.
2. after this no longer produce electric arc before the short circuit second time, welding wire has also just stopped fusing, and promptly the welding wire end is difficult to grow up again, has played the purpose of removing bead like this.
3. welding wire continues to press the inertia wire feed rate, and the wire feed rate of promptly flashing back is sent to workpiece, and repeating step 1, step 2 process equal zero until the wire feed rate of flashing back, and the stage of flashing back finishes, and enters next welding stage of wait.
Described flashing back the stage, its time was controlled at 0.5 second.
The described pulse voltage that flashes back is controlled at 56 volts.
In the described continuous impulse cycle, be controlled at 100 hertz.
Described continuous impulse in the cycle voltage be in time of peak value, be controlled at 0.007 second.
The present invention and tradition are flashed back, and to go the ball method to compare the ball effect obvious for voltage, solution is flashed back and is had the fusing problem of electric arc to wire tip all the time in the process, reach the best bead effect of going, the size of continuous impulse voltage has nothing to do with welding variables simultaneously, and adaptability is stronger.
Embodiment 3
1. the welding stage finishes to enter the stage of flashing back, this moment, wire feed system stopped, but because the inertia welding wire does not stop to send to, but press the inertia wire feed rate, the wire feed rate of promptly flashing back continues to send to workpiece, inertia advances to workpiece welding wire and contacts, when continuous impulse occurring and flash back voltage since the pick-up current of welding wire and workpiece increase suddenly, welding wire receive high density energy and rapidly fusing produce and quick-friedly disconnected welding wire separated with workpiece, electric arc disappear immediately or maintain continuous impulse in the cycle voltage be in time of peak value.
2. after this no longer produce electric arc before the short circuit second time, welding wire has also just stopped fusing, and promptly the welding wire end is difficult to grow up again, has played the purpose of removing bead like this.
3. welding wire continues to press the inertia wire feed rate, and the wire feed rate of promptly flashing back is sent to workpiece, and repeating step 1, step 2 process equal zero until the wire feed rate of flashing back, and the stage of flashing back finishes, and enters next welding stage of wait.
Described flashing back the stage, its time was controlled at 1 second.
The described pulse voltage that flashes back is controlled at 60 volts.
In the described continuous impulse cycle, be controlled at 200 hertz.
Described continuous impulse in the cycle voltage be in time of peak value, be controlled at 0.010 second.
The present invention and the tradition voltage that flashes back goes the ball method to compare the ball successful, solves in the process of flashing back to exist all the time Electric arc is to the Melting Problem of wire tip, reaches best bead effect, the simultaneously size of continuous impulse voltage of going Irrelevant with welding variables, adaptability is stronger.
Claims (5)
1. the control method of a removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding; it is characterized in that; the end of welding stage enters the stage of flashing back; this moment, wire feed system stopped; but because the inertia welding wire does not stop to send to; but press the inertia wire feed rate; the wire feed rate of promptly flashing back continues to send to workpiece; inertia advances to workpiece welding wire and contacts, when continuous impulse occurring and flash back voltage, because the pick-up current of welding wire and workpiece increases suddenly; welding wire receive high density energy and rapidly fusing produce and quick-friedly disconnected welding wire separated with workpiece; electric arc disappear immediately or keep continuous impulse in the cycle voltage be in time of peak value, welding wire continues to press the inertia wire feed rate, the wire feed rate of promptly flashing back is sent to workpiece; repeat said process; equal zero until the wire feed rate of flashing back, the stage of flashing back finishes, and the stage to be welded such as enters.
2. the control method of removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding according to claim 1 is characterized in that, described flashing back the stage, and its time is controlled between 0.2 second and 1 second.
3. the control method of removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding according to claim 1 is characterized in that, the described pulse voltage that flashes back is controlled between 50 volts and 60 volts.
4. the control method of removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding according to claim 1 is characterized in that, in the described continuous impulse cycle, is controlled between 50 hertz and 200 hertz.
5. the control method of removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding according to claim 1 is characterized in that, described continuous impulse in the cycle voltage be in time of peak value, be controlled between 0.003 and 0.010 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100277123A CN100335222C (en) | 2005-07-14 | 2005-07-14 | Control of removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100277123A CN100335222C (en) | 2005-07-14 | 2005-07-14 | Control of removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding |
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| Publication Number | Publication Date |
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| CN1712171A CN1712171A (en) | 2005-12-28 |
| CN100335222C true CN100335222C (en) | 2007-09-05 |
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| CNB2005100277123A Expired - Fee Related CN100335222C (en) | 2005-07-14 | 2005-07-14 | Control of removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101564789B (en) * | 2008-04-21 | 2012-10-24 | 深圳市瑞凌实业股份有限公司 | Automatic welding small vehicle capable of carrying out discontinuous welding and discontinuous welding method |
| CN102513648A (en) * | 2011-12-14 | 2012-06-27 | 湖南科技大学 | Arc start and arc withdrawal control method for double-wire serial submerged arc welding |
| CN105728899B (en) * | 2016-03-31 | 2017-10-31 | 唐山松下产业机器有限公司 | Pulse welding equipment and its control method |
| CN107775150B (en) * | 2017-09-22 | 2019-06-21 | 深圳市麦格米特焊接技术有限公司 | A kind of consumable electrode gas shielded welding terminates the control method of process |
| CN111872514B (en) * | 2020-07-24 | 2022-06-17 | 唐山松下产业机器有限公司 | Burn-back control method for digital welding machine and related equipment |
| CN114535755B (en) * | 2022-03-31 | 2024-01-19 | 北京工业大学 | High-dynamic wire feeding control method for fusion welding process based on piezoelectric actuator |
| CN114833431B (en) * | 2022-06-13 | 2024-05-14 | 唐山松下产业机器有限公司 | Pulse welding burn-back control method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4390771A (en) * | 1981-05-11 | 1983-06-28 | Fairchild Camera & Instrument Corp. | Bonding wire ball forming method and apparatus |
| US5212361A (en) * | 1989-01-07 | 1993-05-18 | Mitsubishi Denki Kabushiki Kaisha | Method and apparatus for forming balls at the ends of wires |
| RU2090325C1 (en) * | 1993-12-22 | 1997-09-20 | Производственное объединение "Юргинский машиностроительный завод" | Welding wire pulsed feeder |
| US6898849B2 (en) * | 2000-09-27 | 2005-05-31 | Texas Instruments Incorporated | Method for controlling wire balls in electronic bonding |
-
2005
- 2005-07-14 CN CNB2005100277123A patent/CN100335222C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4390771A (en) * | 1981-05-11 | 1983-06-28 | Fairchild Camera & Instrument Corp. | Bonding wire ball forming method and apparatus |
| US5212361A (en) * | 1989-01-07 | 1993-05-18 | Mitsubishi Denki Kabushiki Kaisha | Method and apparatus for forming balls at the ends of wires |
| RU2090325C1 (en) * | 1993-12-22 | 1997-09-20 | Производственное объединение "Юргинский машиностроительный завод" | Welding wire pulsed feeder |
| US6898849B2 (en) * | 2000-09-27 | 2005-05-31 | Texas Instruments Incorporated | Method for controlling wire balls in electronic bonding |
Non-Patent Citations (1)
| Title |
|---|
| 新型逆变CO2焊机的控制原理与特点 黄鹏飞 等，焊接学报，第24卷第3期 2003 * |
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| CN1712171A (en) | 2005-12-28 |
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Assignee: Shanghai Tractor & Internal Combustion Engine Co., Ltd. Assignor: Shanghai Jiao Tong University Contract record no.: 2010990000231 Denomination of invention: Control of removing granules by continuous impulsive return voltage in moltening polaric gas protection arc welding Granted publication date: 20070905 License type: Exclusive License Open date: 20051228 Record date: 20100429 |
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