CN104668743A - Plasma-arc welding device implemented by aid of TIG (tungsten inert gas) welding method - Google Patents
Plasma-arc welding device implemented by aid of TIG (tungsten inert gas) welding method Download PDFInfo
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- CN104668743A CN104668743A CN201410855284.2A CN201410855284A CN104668743A CN 104668743 A CN104668743 A CN 104668743A CN 201410855284 A CN201410855284 A CN 201410855284A CN 104668743 A CN104668743 A CN 104668743A
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- 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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
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- 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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
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- 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
- B23K9/24—Features related to electrodes
- B23K9/26—Accessories for electrodes, e.g. ignition tips
-
- 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
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
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- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
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Abstract
The invention relates to a plasma-arc welding device implemented by the aid of a TIG (tungsten inert gas) welding method. The plasma-arc welding device comprises an upper gun and a lower gun. An upper spray nozzle is connected with the lower end of the upper gun and is mechanically coaxially connected with the lower gun. A water cooling groove is formed in the wall of the upper gun, an upper water inlet pipe, an upper water outlet pipe and an upper gas inlet pipe are arranged in the wall of the upper gun, a flow guide component, a tungsten electrode clamp and a tungsten electrode are coaxially arranged in the upper gun, and the tungsten electrode penetrates the tungsten electrode clamp and extends into the lower gun. A water cooling groove is formed in the wall of the lower gun, a lower water inlet pipe, a lower water outlet pipe and a lower gas inlet pipe are arranged in the wall of the lower gun, a lower spray nozzle is connected with the inner wall of the lower end of the lower gun, pore passages are arranged in the center of the lower spray nozzle, the tail end of the tungsten electrode is separated from each center pore passage of the lower spray nozzle by a certain distance, and a protective cover is connected to the outer wall of the lower end of the lower gun. The plasma-arc welding device has the advantages that plasma-arc welding can be implemented, the TIG welding efficiency and the quality of weld joints can be obviously improved, and the plasma-arc welding device is low in welding cost as compared with the traditional plasma-arc welding.
Description
Technical field
The present invention relates to the device that a kind of TIG of utilization welding method realizes PLASMA ARC WELDING.
Background technology
Argon tungsten-arc welding (TIG) has the advantages such as welding cost is lower, welding process stable, appearance of weld is attractive in appearance, protected effect is good; be used widely aborning, particularly to the high quality welds most advantage of non-ferrous metal, stainless steel and titanium alloy.But due to tungsten electrode current capacity limited, arc power is restricted, and cause pool depth shallow, welding efficiency is lower.TIG weld be born in basis compression arc welding procedure---plasma arc welding (PAW) connection technology (PAW) then significantly can improve the inefficient deficiency of TIG welding production.The welding gun tungsten electrode of plasma arc is reduced in nozzle, and the aperture of nozzle is smaller, and when electric arc is by nozzle bore, electric arc arc column sectional area is restricted, and electric arc can not spread, produces outsidely restrain effect and form the plasma arc of high current density.High-current plasma arc welding (100 ~ 300A) complete for workpiece penetration, can realize PLASMA ARC WELDING, namely under the effect of plasma arc, forms the aperture that runs through molten bath, realizes single-sided welding two-sides forming.
Compared with welding with traditional TIG, PLASMA ARC WELDING is due to its special keyhole effect, there is the advantages such as welding seam deep width ratio is large, heat affected area is narrow, forming quality is good, welding productivity is high, the welding of various metal material, built-up welding, spraying, cutting etc. can be widely used in.But because plasma welding machine cost of equipment is more much higher than the TIG welding machine with electrical power, equipment one-time investment is large; Because conventional plasma welding gun structure is complicated, heavier, be unfavorable for manual operations.Above two reasons limit the industry application of plasma arc welding (PAW) connection technology.
To sum up analyze, existing TIG solder technology welding efficiency is not high, and though conventional plasma arc welding technology improves welding productivity but welding cost is higher, and welder is comparatively heavy, make it to realize PLASMA ARC WELDING if carry out transformation to existing TIG welding gun, both can promote the welding efficiency of TIG weldering, significantly can reduce again the production cost of plasma arc welding method, the flexibility of PLASMA ARC WELDING can also be strengthened, thus there is larger using value.
Summary of the invention
Based on above weak point, a kind of TIG of utilization welding method is the object of the present invention is to provide to realize the device of PLASMA ARC WELDING, in order to realize the plasma arc welding (PAW) connection technology of low cost, available mode of welding manually or automatically carries out PLASMA ARC WELDING, and equipment cost significantly reduces compared to plasma arc welding (PAW).
The technology used in the present invention is as follows: a kind of TIG of utilization welding method realizes the device of PLASMA ARC WELDING, comprise electrode cap (1), sealing ring (2), upper cutting gun (3), tungsten electrode folder (4), conducting element (6), top nozzle (7), centering ring (8), lower gun body (9), lower discharging tube (10), protective cover (11), lower nozzle (12), tungsten electrode (13), lower inlet duct (14), lower water inlet pipe (15), enterprising tracheae (21), upper water inlet pipe (22) and upper water-out pipe (23), screw thread pair is adopted to be connected between electrode cap (1) with upper cutting gun (3), sealing ring (2) is positioned between electrode cap (1) and upper cutting gun (3), water-cooling groove (5) is had in the wall of upper cutting gun (3), electrode cap (1) center has two ducts, upper cutting gun (3) sidewall is connected with enterprising tracheae (21), upper water inlet pipe (22) and upper water-out pipe (23), upper cutting gun (3) is built with tungsten electrode folder (4), conducting element (6) and tungsten electrode (13), tungsten electrode folder (4), conducting element (6) and tungsten electrode (13) are coaxially arranged with upper cutting gun (3), tungsten electrode folder (4) stretches into conducting element (6) endoporus through the short-bore road of electrode cap (1) along upper cutting gun (3) axis, tungsten electrode (13) passes elongated hole road and tungsten electrode folder (4) of electrode cap (1) along upper cutting gun (3) axis, upper cutting gun (3) lower end is connected with top nozzle (7) threaded upper ends, top nozzle (7) lower end and lower gun body (9) upper end are coaxially fastenedly connected, lower gun body (9) lower end is connected with lower nozzle (12) upper end by inner thread, lower nozzle (12) bottom center place has air-flow and restrains duct, lower gun body (9) lower end is connected with protective cover (11) by outer wall thread, lower gun body (9) inwall has water-cooling groove, lower gun body (9) sidewall is connected with lower discharging tube (10), lower inlet duct (14) and lower water inlet pipe (15), centering ring (8) is fixed on lower gun body (9) inwall staircase structural model place in the axial direction, stretches into the tungsten electrode (13) of lower gun body (9) through centering ring (8).
The present invention also has following technical characteristic:
1. two ducts as above, one identical with tungsten electrode (13) external diameter, and one to press from both sides (4) external diameter with tungsten electrode identical.
2. the inwall of upper cutting gun (3) as above and the outer wall of conducting element (6) respectively have place's staircase structural model in the axial direction, and conducting element (6) is fixed in upper cutting gun (3) by staircase structural model; Conducting element (6) inwall is sloping platform stage structure, and sloping platform rank place conducting element (6) internal diameter reduces gradually, the narrowest place internal diameter 1 ~ 1.5mm larger than tungsten electrode (13) diameter.
3. top nozzle (7) lower end described in is connected by screw threads for fastening with lower gun body (9) upper end.
4. upper cutting gun (3) as above and lower gun body (9) outside are overlapped all respectively and are had clip (16); Be bolted connection between two clips (16).
5. the welding power source system of this device is by two-way electric power generating composition, and a road power supply is connected between tungsten electrode (13) and lower nozzle (12), for playing arc power; Another road power supply is connected between tungsten electrode (13) and workpiece, is main power source; The high frequency starting the arc is adopted to make to produce a little electric arc between tungsten electrode (13) and lower nozzle (12) inwall, along with electrode is heated after the starting the arc, space temperature raises, charged High Temperature Gas layer is produced gradually between electrode and workpiece, under the floating voltage that main power source is higher, electric arc is automatically transferred between electrode and workpiece and is burnt.Be restricted in due to electric arc compression during the duct of electric arc by lower nozzle (12), arc energy density increases, and temperature increases, thus realizes PLASMA ARC WELDING.
6. adjusting tungsten electrode (13) makes its length of stretching out top nozzle (7) be 5 ~ 10mm, adopts suitable welding condition, can realize traditional TIG welding.
Feature of the present invention and beneficial effect:
(1) appropriate reconstruction has been carried out to traditional TIG welding gun, TIG welding equipment can be used to realize PLASMA ARC WELDING, improved welding efficiency and the weldquality of TIG welding;
(2) compared to conventional plasma arc welding, the device utilizing TIG welding method to realize PLASMA ARC WELDING can make welding cost significantly reduce;
(3) TIG welding can be realized when only welding with lance body structure, can PLASMA ARC WELDING be realized after upper cutting gun and lower gun body are coaxially assembled, expand the range of application of traditional TIG soldering set;
(4) hand both can have been taked to realize PLASMA ARC WELDING, and also this device can be assembled in robot welding system and realize self-action PLASMA ARC WELDING, flexibly and easily.
Accompanying drawing explanation
Fig. 1 is the welding gun structure figure of embodiments of the invention 1.
Fig. 2 is the source of welding current circuit theory diagrams of first.
Fig. 3 is the welding gun structure figure of the embodiment of the present invention 2.
Detailed description of the invention
Further illustrate according to Figure of description citing below:
Embodiment 1
As shown in Figure 1, a kind of TIG of utilization welding method realizes the device of PLASMA ARC WELDING, comprise electrode cap 1, sealing ring 2, upper cutting gun 3, tungsten electrode folder 4, conducting element 6, top nozzle 7, centering ring 8, lower gun body 9, lower discharging tube 10, protective cover 11, lower nozzle 12, tungsten electrode 13, lower inlet duct 14, lower water inlet pipe 15, enterprising tracheae 21, upper water inlet pipe 22 and upper water-out pipe 23, screw thread pair is adopted to be connected between electrode cap 1 with upper cutting gun 3, sealing ring 2 is between electrode cap 1 and upper cutting gun 3, have water-cooling groove 5 in the wall of upper cutting gun 3, electrode cap 1 center has the duct identical with tungsten electrode 13 external diameter and presss from both sides the identical duct of 4 external diameters with tungsten electrode, upper cutting gun 3 sidewall is connected with enterprising tracheae 21, upper water inlet pipe 22 and upper water-out pipe 23, upper cutting gun 3 is built with tungsten electrode folder 4, conducting element 6 and tungsten electrode 13, tungsten electrode folder 4, conducting element 6 and tungsten electrode 13 coaxially arranged with upper cutting gun 3, the inwall of upper cutting gun 3 and the outer wall of conducting element 6 respectively have place's staircase structural model in the axial direction, conducting element 6 is fixed in upper cutting gun 3 by staircase structural model, tungsten electrode folder 4 stretches into conducting element 6 endoporus through the short-bore road of electrode cap 1 along upper cutting gun 3 axis, tungsten electrode 13 passes elongated hole road and the tungsten electrode folder 4 of electrode cap 1 along upper cutting gun 3 axis, conducting element 6 inwall is sloping platform stage structure, sloping platform rank place conducting element 6 internal diameter reduces gradually, the narrowest place internal diameter 1 ~ 1.5mm larger than tungsten electrode 13 diameter, when carrying out threaded engagement between electrode cap 1 and upper cutting gun 3, tungsten electrode presss from both sides 4 upper ends and is subject to downward pressure effect, and lower end contacts with the sloping platform hierarchic structure of conducting element 6, and tungsten electrode presss from both sides 4 lower ends and shrinks gradually, realizes the clamping for tungsten electrode 13, upper cutting gun 3 lower end is connected with top nozzle 7 threaded upper ends, top nozzle 7 lower end is connected by screw threads for fastening with lower gun body 9 upper end, and top nozzle 7 lower end is coaxial with lower gun body 9, lower gun body 9 lower end is connected with lower nozzle 12 upper end by inner thread, and lower gun body 9 lower end is connected with protective cover 11 by outer wall thread, lower gun body 9 inwall has water-cooling groove, lower gun body 9 sidewall is connected with lower discharging tube 10, lower inlet duct 14 and lower water inlet pipe 15, and centering ring 8 is fixed on lower gun body 9 inwall staircase structural model place in the axial direction, stretches into the tungsten electrode 13 of lower gun body 9 through centering ring 8.
When using this contrive equipment to realize PLASMA ARC WELDING, the effect of the protection gas that enterprising tracheae 21 passes into is equivalent to the ion-gas in PLASMA ARC WELDING, and the effect of the protection gas that lower inlet duct 14 passes into is equivalent to the protection gas in PLASMA ARC WELDING.As shown in Figure 2, welding power source system is by two-way electric power generating composition, and a road power supply is connected between tungsten electrode 13 and lower nozzle 12, for playing arc power; Another road power supply is connected between tungsten electrode 13 and workpiece, is main power source.The high frequency starting the arc is adopted to make to produce a little electric arc between tungsten electrode 13 and lower nozzle 12 inwall.Along with electrode is heated after the starting the arc, space temperature raises, and between electrode and workpiece, produce charged High Temperature Gas layer gradually, under the floating voltage that main power source is higher, electric arc is automatically transferred between electrode and workpiece and burnt.Be restricted in due to electric arc compression during the duct of electric arc by lower nozzle 12, arc energy density increases, and temperature increases, thus realizes PLASMA ARC WELDING.After lower gun body 12 is unloaded from overall structure, adjustment tungsten electrode 13 makes its length of stretching out top nozzle 7 be 5 ~ 10mm, adopts suitable welding condition, can realize traditional TIG welding.
Embodiment 2
As shown in Figure 3, this welding gun structure is in the same manner as in Example 1, and difference is, top nozzle 7 and lower gun body 9 outer wall respectively overlap and have a clip 16, the clamping being realized top nozzle 7 and lower gun body 9 by screw 17, bolt 18, spring washer 19 and nut 20 be connected.
Claims (7)
1. the device utilizing TIG welding method to realize PLASMA ARC WELDING, comprise electrode cap (1), sealing ring (2), upper cutting gun (3), tungsten electrode folder (4), conducting element (6), top nozzle (7), centering ring (8), lower gun body (9), lower discharging tube (10), protective cover (11), lower nozzle (12), tungsten electrode (13), lower inlet duct (14), lower water inlet pipe (15), enterprising tracheae (21), upper water inlet pipe (22) and upper water-out pipe (23), it is characterized in that, screw thread pair is adopted to be connected between electrode cap (1) with upper cutting gun (3), sealing ring (2) is positioned between electrode cap (1) and upper cutting gun (3), water-cooling groove (5) is had in the wall of upper cutting gun (3), electrode cap (1) center has two ducts, upper cutting gun (3) sidewall is connected with enterprising tracheae (21), upper water inlet pipe (22) and upper water-out pipe (23), upper cutting gun (3) is built with tungsten electrode folder (4), conducting element (6) and tungsten electrode (13), tungsten electrode folder (4), conducting element (6) and tungsten electrode (13) are coaxially arranged with upper cutting gun (3), tungsten electrode folder (4) stretches into conducting element (6) endoporus through the short-bore road of electrode cap (1) along upper cutting gun (3) axis, tungsten electrode (13) passes elongated hole road and tungsten electrode folder (4) of electrode cap (1) along upper cutting gun (3) axis, upper cutting gun (3) lower end is connected with top nozzle (7) threaded upper ends, top nozzle (7) lower end and lower gun body (9) upper end are coaxially fastenedly connected, lower gun body (9) lower end is connected with lower nozzle (12) upper end by inner thread, lower nozzle (12) bottom center place has air-flow and restrains duct, lower gun body (9) lower end is connected with protective cover (11) by outer wall thread, lower gun body (9) inwall has water-cooling groove, lower gun body (9) sidewall is connected with lower discharging tube (10), lower inlet duct (14) and lower water inlet pipe (15), centering ring (8) is fixed on lower gun body (9) inwall staircase structural model place in the axial direction, stretches into the tungsten electrode (13) of lower gun body (9) through centering ring (8).
2. a kind of TIG of utilization welding method according to claim 1 realizes the device of PLASMA ARC WELDING, it is characterized in that: two described ducts, and one identical with tungsten electrode (13) external diameter, and one to press from both sides (4) external diameter with tungsten electrode identical.
3. a kind of TIG of utilization welding method according to claim 1 realizes the device of PLASMA ARC WELDING, it is characterized in that: the inwall of described upper cutting gun (3) and the outer wall of conducting element (6) respectively have place's staircase structural model in the axial direction, and conducting element (6) is fixed in upper cutting gun (3) by staircase structural model; Conducting element (6) inwall is sloping platform stage structure, and sloping platform rank place conducting element (6) internal diameter reduces gradually, the narrowest place internal diameter 1 ~ 1.5mm larger than tungsten electrode (13) diameter.
4. a kind of TIG of utilization welding method according to claim 1 realizes the device of PLASMA ARC WELDING, it is characterized in that: described top nozzle (7) lower end is connected by screw threads for fastening with lower gun body (9) upper end.
5. a kind of TIG of utilization welding method according to claim 1 realizes the device of PLASMA ARC WELDING, it is characterized in that: there is clip (16) in described upper cutting gun (3) and lower gun body (9) outside all respectively cover; Be bolted connection between two clips (16).
6. a kind of TIG of the utilization welding method according to any one of claim 1-5 realizes the device of PLASMA ARC WELDING, it is characterized in that: the welding power source system of this device is by two-way electric power generating composition, one road power supply is connected between tungsten electrode (13) and lower nozzle (12), for playing arc power; Another road power supply is connected between tungsten electrode (13) and workpiece, is main power source; The high frequency starting the arc is adopted to make to produce a little electric arc between tungsten electrode (13) and lower nozzle (12) inwall, along with electrode is heated after the starting the arc, space temperature raises, charged High Temperature Gas layer is produced gradually between electrode and workpiece, under the floating voltage that main power source is higher, electric arc is automatically transferred between electrode and workpiece and is burnt.Be restricted in due to electric arc compression during the duct of electric arc by lower nozzle (12), arc energy density increases, and temperature increases, thus realizes PLASMA ARC WELDING.
7. a kind of TIG of utilization welding method according to claim 1 realizes the device of PLASMA ARC WELDING, it is characterized in that: adjustment tungsten electrode (13) makes its length of stretching out top nozzle (7) be 5 ~ 10mm, traditional TIG welding can be realized.
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Cited By (16)
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|---|---|---|---|---|
| CN105491783A (en) * | 2016-02-16 | 2016-04-13 | 衢州迪升工业设计有限公司 | Plasma pyrolysis device achieving arc striking by means of fuse wire |
| CN105478974A (en) * | 2015-12-28 | 2016-04-13 | 哈尔滨工业大学（威海） | Transferred arc and non-transferred arc synchronous rotation type plasma welding gun |
| CN105537743A (en) * | 2016-02-05 | 2016-05-04 | 中国民航大学 | Micro-plasma arc welding gun |
| CN106270989A (en) * | 2016-09-23 | 2017-01-04 | 卓拓精密工具（苏州）有限公司 | A kind of metal cutting welding plasma arc device |
| CN106735803A (en) * | 2017-01-23 | 2017-05-31 | 宁波驰迈激光科技有限公司 | A kind of plasma arc powder surfacing rifle |
| CN107335906A (en) * | 2017-07-28 | 2017-11-10 | 山东船舶技术研究院 | A kind of embedded dual power supply and double tungsten electrode welders and welding method |
| CN108817611A (en) * | 2018-06-29 | 2018-11-16 | 山东大学 | It is a kind of to force to restrain type electric arc metal increasing material manufacturing device |
| CN108817621A (en) * | 2018-08-02 | 2018-11-16 | 威海万丰镁业科技发展有限公司 | Low frequency sound field controlling type longitudinal movement electric arc Tig Welding device and method |
| CN109465527A (en) * | 2019-01-09 | 2019-03-15 | 湘潭大学 | A kind of magnetic control swing plasma arc welding (PAW) connection device for narrow gap |
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| CN105478974A (en) * | 2015-12-28 | 2016-04-13 | 哈尔滨工业大学（威海） | Transferred arc and non-transferred arc synchronous rotation type plasma welding gun |
| CN105537743A (en) * | 2016-02-05 | 2016-05-04 | 中国民航大学 | Micro-plasma arc welding gun |
| CN105537743B (en) * | 2016-02-05 | 2018-05-15 | 中国民航大学 | Micro-plasma arc welding rifle |
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| CN106270989A (en) * | 2016-09-23 | 2017-01-04 | 卓拓精密工具（苏州）有限公司 | A kind of metal cutting welding plasma arc device |
| CN106735803A (en) * | 2017-01-23 | 2017-05-31 | 宁波驰迈激光科技有限公司 | A kind of plasma arc powder surfacing rifle |
| CN107335906A (en) * | 2017-07-28 | 2017-11-10 | 山东船舶技术研究院 | A kind of embedded dual power supply and double tungsten electrode welders and welding method |
| CN108817611A (en) * | 2018-06-29 | 2018-11-16 | 山东大学 | It is a kind of to force to restrain type electric arc metal increasing material manufacturing device |
| CN108817621A (en) * | 2018-08-02 | 2018-11-16 | 威海万丰镁业科技发展有限公司 | Low frequency sound field controlling type longitudinal movement electric arc Tig Welding device and method |
| CN109465527A (en) * | 2019-01-09 | 2019-03-15 | 湘潭大学 | A kind of magnetic control swing plasma arc welding (PAW) connection device for narrow gap |
| DE102019121380A1 (en) * | 2019-08-07 | 2021-02-11 | Faurecia Emissions Control Technologies, Germany Gmbh | Welding torch |
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Effective date of registration: 20170811 Address after: 110027, No. twenty-six, No. 4, North Road, Shenyang economic and Technological Development Zone, Liaoning Patentee after: SHENYANG JINCHANG LANYU NEW MATERIAL CO., LTD. Address before: 150001 School of materials science and engineering,, Harbin, Nangang, China, Harbin Institute of Technology, Patentee before: Harbin Institute of Technology |