CN104028883B - A kind of device of pulse current assistant electric arc welding process - Google Patents
A kind of device of pulse current assistant electric arc welding process Download PDFInfo
- Publication number
- CN104028883B CN104028883B CN201410289453.0A CN201410289453A CN104028883B CN 104028883 B CN104028883 B CN 104028883B CN 201410289453 A CN201410289453 A CN 201410289453A CN 104028883 B CN104028883 B CN 104028883B
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- pulse current
- circuit
- welding
- arc welding
- current
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
- B23K9/091—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits
- B23K9/092—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits characterised by the shape of the pulses produced
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
The present invention discloses a kind of device of pulse current assistant electric arc welding process, comprise the device of welding machine electric power, welding circuit, applying pulse current, impulse circuit in welding circuit and resistance circuit are two current branch of drawing from welding machine electric power, in parallel with welding circuit, the pulse current that DC current is converted to discontinuous conduction by gauge tap is set in current branch, and makes at a time only have a road conducting in resistance circuit and impulse circuit; The device applying pulse current contains the identical positive pole slide block of structure and negative pole slide block, it is fixed on welder head, by conductive lever, the electric current on terminal plate is imported on graphite slider, the graphite slider being arranged on both sides, arc welding molten bath contacts with welded part sliding friction formula, together move ahead with welding wire, synchronously pulse current is applied in arc welding molten bath.Welded Joints place of the present invention applies pulse current, can reduce weld seam coarse grain zone, improve the microstructure and mechanical property at welding point place.
Description
Technical field
The present invention relates to a kind of arc-welding apparatus, particularly a kind of device of pulse current assistant electric arc welding process.
Background technology
Welding is that workpiece and solder fusing are formed melt region, just defines the connection between material after the cooled and solidified of molten bath.Owing to needing larger heat input in welding process, this makes the coarse grain zone of welding point wider, and mechanical property is poor, requires that high occasion (as gas pipeline used of transferring natural gas from the west to the east) is worthless in welding quality.Usual people are by improving welding joint structure that the grade of steel of steel avoids large heat input to bring and the shortcoming that mechanical property is deteriorated, but often improve a grade of steel, and its difficulty of processing and production cost all can increase a lot.Existing result of study shows, pulse current can make that the tissue of liquid metal and high-temperature solid metal obtains evenly, refinement.And welding process is exactly a rapid melting and the metallurgical process of solidifying, existing liquid metal, there is again high-temperature solid metal, therefore Welded Joints place applies pulse current, can be used for improving the microstructure and mechanical property at welding point place, thus avoid improving the shortcomings such as high difficulty of processing that grade of steel brings and high cost.
Summary of the invention
The present invention is directed to the problem that welding point coarse grain zone is wider, mechanical property is poor that existing Arc Welding Process exists, proposing one is incorporated in arc welding molten bath by pulse current, is improved the device of the microstructure and mechanical property of welding point by pulse current.
The present invention's design is realized by following technical proposals: a kind of device of pulse current assistant electric arc welding process, comprise welding machine electric power, welding circuit, it is characterized in that: also comprise the device applying pulse current, the device of described applying pulse current comprises positive pole slide block P and negative pole slide block N, described positive pole slide block P is connected by link 10 with negative pole slide block N, described positive pole slide block P is identical with negative pole slide block N structure, comprise graphite slider 2, conductive lever 5, terminal plate 9 and insulating part, described terminal plate 9 is arranged on above link 10, described conductive lever 5 is connected with terminal plate 9 in rear insertion link 10, be connected with the graphite slider 2 be embedded in link lower recess, described graphite slider 2, conductive lever 5, terminal plate 9 is respectively equipped with insulating part with the contact site of link 10 and makes it mutually isolated, the device of described applying pulse current is fixed on welder head, by conductive lever 5, the electric current on terminal plate 9 is imported on graphite slider 2, the graphite slider 2 being arranged on both sides, arc welding molten bath contacts with welded part sliding friction formula, together move ahead with welding wire 12, synchronously pulse current is applied in arc welding molten bath, described welding circuit comprises welding circuit, impulse circuit and resistance circuit, its welding circuit is conventional arc welding circuit, its impulse circuit and resistance circuit are the current branch of drawing from welding machine electric power, in parallel with welding circuit, arrange the pulse current that DC current is converted to discontinuous conduction by gauge tap K in current branch, when impulse circuit conducting, resistance circuit ends, when impulse circuit ends, resistance circuit conducting.
Impulse circuit and resistance circuit is provided with in welding circuit of the present invention, arranging resistance circuit is to ensure the constant of commissure electric current, arranging gauge tap K in circuit makes at a time impulse circuit and resistance circuit can only have a road conducting, such design also makes the DC current of drawing from welding machine electric power be converted to pulse current, reduce the electrocaloric effect in welded part, improve electric current to improve the microstructure and mechanical property effect of welding point.
Welded Joints place of the present invention applies pulse current, can reduce weld seam coarse grain zone, improve the microstructure and mechanical property at welding point place, thus the shortcoming such as the high difficulty of processing that raising grade of steel can be avoided to bring and high cost.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Fig. 2 is structural representation of the present invention.
Fig. 3 is the apparatus structure schematic diagram of applying pulse current of the present invention.
In figure: 1-weldment a, 2-graphite slider, 3-sells, 4-spring, 5-conductive lever, 6-insulation sleeve, 7-insulating washer, 8-nut, 9-terminal plate, 10-link, 11-felt pad, 12-welding wire, 13-weldment b; P-positive pole slide block, N-negative pole slide block, K-gauge tap.
Detailed description of the invention
Hereinafter, with reference to the accompanying drawings of embodiments of the invention.
With reference to Fig. 1-2, the device of pulse current assistant electric arc welding process is made up of the device of welding machine electric power, welding circuit and the applying pulse current containing positive pole slide block P, negative pole slide block N, and welding circuit comprises welding circuit, impulse circuit and resistance circuit.Welding circuit is: welding machine electric power-positive pole slide block P-weldment b13-molten bath-welding wire 12-welding machine electric power, completes conventional electric arc welding process.Impulse circuit and resistance circuit in parallel with welding circuit, gauge tap K is set and makes at a time impulse circuit and resistance circuit can only have a road conducting.Impulse circuit is: welding machine electric power-positive pole slide block P-weldment b13-molten bath-weldment a1-negative pole slide block N-gauge tap K-welding machine electric power, imports to pulse current in molten bath, is used for improving the microstructure and mechanical property of arc welding joint.Resistance circuit is: welding machine electric power-resistance circuit-gauge tap K-welding machine electric power, in order to ensure the constant of commissure electric current.When arc welding, welding circuit normally completes conventional electric arc welding process, by conducting or the cut-off of gauge tap K control impuls circuit, the frequency of switch is the frequency of pulse current, the duration of single conducting is the width of pulse current, and the intensity of pulse current is regulated by welding machine electric power.The resistance value of adjusting resistance circuit is identical with the resistance value of impulse circuit in advance, regulates and controls at a time have among resistance circuit and impulse circuit and only have a road conducting, to ensure the constant of commissure electric current by gauge tap K.
With reference to Fig. 3, the device of applying pulse current of the present invention comprises positive pole slide block P, link 10 and negative pole slide block N.Positive pole slide block P is identical with negative pole slide block N structure, comprises graphite slider 2, pin 3, spring 4, conductive lever 5, insulation sleeve 6, insulating washer 7, nut 8, terminal plate 9 and felt pad 11.Graphite slider 2 is embedded in the groove of link 10, and makes it to keep apart with link 10 with felt pad 11.Be connected for pin 3 between conductive lever 5 with graphite slider 2, be convenient to replacing and the adjustment of graphite slider 2.The phenomenon of loose contact between the graphite slider caused due to wearing and tearing in order to avoid appearance and welded part, utilizes spring 4 to be pressed on the surface of welded part by graphite slider 2.The upper end of conductive lever 5 is provided with nut 8, when graphite slider 2 serious wear can not use, after nut 8 can being unloaded, graphite slider 2 is extracted out in the groove of link 10, changes.This device is fixed on the head of welding machine, and graphite slider is together moved ahead with welding wire, is positioned at the both sides in arc welding molten bath all the time, is synchronously applied in arc welding molten bath by pulse current.
Claims (5)
1. the device of a pulse current assistant electric arc welding process, comprise welding machine electric power and welding circuit, it is characterized in that: also comprise the device applying pulse current, the device of described applying pulse current comprises positive pole slide block (P) and negative pole slide block (N), described positive pole slide block (P) is connected by link (10) with negative pole slide block (N), described positive pole slide block (P) is identical with negative pole slide block (N) structure, comprise graphite slider (2), conductive lever (5), terminal plate (9) and insulating part, described terminal plate (9) is arranged on above link (10), described conductive lever (5) inserts after being connected with terminal plate (9) in link (10), be connected with the graphite slider be embedded in link lower recess (2), described graphite slider (2), conductive lever (5), terminal plate (9) is respectively equipped with insulating part with the contact site of link (10) and makes it mutually isolated, the device of described applying pulse current is fixed on welder head, by conductive lever (5), the electric current on terminal plate (9) is imported on graphite slider (2), the graphite slider (2) being arranged on both sides, arc welding molten bath contacts with welded part sliding friction formula, together move ahead with welding wire (12), synchronously pulse current is applied in arc welding molten bath, described welding circuit comprises welding circuit, impulse circuit and resistance circuit, its welding circuit is conventional arc welding circuit, its impulse circuit and resistance circuit are two current branch of drawing from welding machine electric power, in parallel with welding circuit, arrange the pulse current that DC current is converted to discontinuous conduction by gauge tap (K) in current branch, when impulse circuit conducting, resistance circuit ends, when impulse circuit ends, resistance circuit conducting.
2. the device of pulse current assistant electric arc welding process according to claim 1, is characterized in that, the device of described applying pulse current, and its graphite slider (2) and conductive lever (5) adopt to be sold (3) and be connected.
3. the device of pulse current assistant electric arc welding process according to claim 1, it is characterized in that, the device of described applying pulse current, is provided with and conductive lever (5) non-contacting spring (4) in the groove gap of its graphite slider (2) top.
4. the device of pulse current assistant electric arc welding process according to claim 1, is characterized in that, the device of described applying pulse current, and its conductive lever (5) upper end is provided with nut (8).
5. the device of pulse current assistant electric arc welding process according to claim 1, it is characterized in that, described resistance circuit and impulse circuit are set with identical resistance value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410289453.0A CN104028883B (en) | 2014-06-25 | 2014-06-25 | A kind of device of pulse current assistant electric arc welding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410289453.0A CN104028883B (en) | 2014-06-25 | 2014-06-25 | A kind of device of pulse current assistant electric arc welding process |
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| Publication Number | Publication Date |
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| CN104028883A CN104028883A (en) | 2014-09-10 |
| CN104028883B true CN104028883B (en) | 2015-11-18 |
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| CN201410289453.0A Expired - Fee Related CN104028883B (en) | 2014-06-25 | 2014-06-25 | A kind of device of pulse current assistant electric arc welding process |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368902A (en) * | 2014-11-11 | 2015-02-25 | 无锡恒富科技有限公司 | Bonding conducting device |
| CN105127552B (en) * | 2015-10-23 | 2017-09-05 | 南京中车浦镇城轨车辆有限责任公司 | A kind of pulse current auxiliary welding device and welding method |
| CN105543468B (en) * | 2015-12-24 | 2017-12-29 | 燕山大学 | The device that seam organization refines after a kind of pulse current auxiliary welded tube high-frequency welding |
| CN107855672B (en) * | 2017-12-22 | 2024-03-01 | 上海海事大学 | Method and system for reducing laser welding residual stress by coupling high-energy pulse current |
| CN111203614B (en) * | 2020-01-16 | 2021-05-25 | 燕山大学 | Device for assisting LSAW pipe welding process through pulse current and using method |
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| US4293758A (en) * | 1979-08-01 | 1981-10-06 | Midcon Pipeline Equipment Co. | Welding apparatus including means for depositing the weld metal along parallel paths |
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| CN101215630A (en) * | 2007-12-26 | 2008-07-09 | 燕山大学 | Electromagnetic thermal effect welding seam crack arresting and soldering structure strengthening device |
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2014
- 2014-06-25 CN CN201410289453.0A patent/CN104028883B/en not_active Expired - Fee Related
Patent Citations (6)
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| JPS55166002A (en) * | 1979-06-13 | 1980-12-24 | Kenkichi Suzuki | Position detector |
| US4293758A (en) * | 1979-08-01 | 1981-10-06 | Midcon Pipeline Equipment Co. | Welding apparatus including means for depositing the weld metal along parallel paths |
| CN1072123A (en) * | 1991-11-12 | 1993-05-19 | 严元增 | The manual welding by direct current pulse method and apparatus |
| JPH097436A (en) * | 1995-06-19 | 1997-01-10 | Tokyo Gas Co Ltd | Power transmission cable of pipe circumference automatic welding equipment |
| CN101215630A (en) * | 2007-12-26 | 2008-07-09 | 燕山大学 | Electromagnetic thermal effect welding seam crack arresting and soldering structure strengthening device |
| CN102848058A (en) * | 2011-06-30 | 2013-01-02 | 宝山钢铁股份有限公司 | Method and device for refining weld joint structures by using pulsed magnet fields in welding process |
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| CN104028883A (en) | 2014-09-10 |
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Granted publication date: 20151118 Termination date: 20180625 |