CN214721346U - Large-thickness narrow-gap titanium alloy plate MIG/MAG welding gun - Google Patents
Large-thickness narrow-gap titanium alloy plate MIG/MAG welding gun Download PDFInfo
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- CN214721346U CN214721346U CN202120354220.XU CN202120354220U CN214721346U CN 214721346 U CN214721346 U CN 214721346U CN 202120354220 U CN202120354220 U CN 202120354220U CN 214721346 U CN214721346 U CN 214721346U
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Abstract
The utility model provides a narrow clearance titanium alloy board MIG MAG welder of big thickness, including the rifle head subassembly that connects gradually, cable assembly and european style joint subassembly, the rifle head subassembly is including the electrically conductive rifle head that connects gradually, 45 rifle neck and welder handle subassembly, electrically conductive rifle head includes the electrically conductive mouth of two-stage formula, awl nozzle and gaseous protection device of strengthening, the electrically conductive mouth of two-stage formula includes the electrically conductive mouth of integrated into one piece's the conventional electrically conductive mouth of one-level and the long and thin electrically conductive mouth of second grade, the electrically conductive mouth of one-level conventional is connected with the electrically conductive mouth seat, the electrically conductive mouth seat passes through the shunt and is connected with 45 rifle neck, be equipped with the awl nozzle at the outer cover of the electrically conductive mouth of two-stage formula, the long and thin electrically conductive mouth of second grade stretches out the awl nozzle, gaseous protection device of strengthening is fixed on the awl nozzle. The utility model discloses can guarantee that the welding gun head freely walks in the narrow clearance groove of large thickness titanium alloy, the welding wire passes through the accurate welding seam groove that arrives of super narrow clearance contact nozzle and treats the welding position, can guarantee again that the welding seam metal is protected completely by welder's gas protection device, guarantees the welding seam quality.
Description
Technical Field
The utility model belongs to the technical field of the welding process, especially, relate to a narrow clearance titanium alloy plate MIG of heavy gauge/MAG welder.
Background
Titanium alloy is known as marine metal, space metal and future metal due to its many excellent characteristics of high specific strength, no magnetism, no toxicity, high strength, corrosion resistance, wide working temperature range, good processing and forming, etc. It is widely applied to the fields of marine drilling, pressure vessels, deep submergence vehicles, nuclear submarines, aerospace ships, weaponry and the like. As early as the 80's of the last century, ocean defense construction army in the united states has started to manufacture ocean transport vessels from titanium alloy, so that the service life and stability of the ocean transport vessels are greatly improved, and the maintenance cost is also greatly reduced. In recent years, the proportion of titanium alloy materials used in the deep sea space workstation manufacturing industry has been increasing in many western developed countries.
Compared with integral stamping, the welding preparation has the advantages of small processing amount, short period, less material consumption and low cost. Titanium alloy required in the fields of deep sea space workstations, nuclear submarines, deep submergence vehicles and the like is large-thickness plates, the thickness of the titanium alloy is usually up to 20mm, and narrow-gap grooves are generally designed for improving production efficiency and are used for welding. At present, vacuum electron beam welding and laser wire filling welding are mostly adopted for the narrow gap welding of the large-thickness titanium alloy. The electron beam welding needs a vacuum environment, which not only increases the production cost, but also limits the size of a welding processing test piece, and simultaneously generates certain radiation; the narrow-gap laser wire-filling welding technology still has great dependence on a high-power laser, however, the laser power is too large, the range of a heating region is not easy to control, the plasma and a keyhole are unstable, the fusion ratio of a welding seam is increased, the advantage of accurate heating of a laser heat source is sacrificed, and splashing and smoke are easy to occur, which can seriously affect the welding quality.
The MIG welding equipment widely applied at present has low cost, simple operation and high welding production efficiency, and is more mature in the application of carbon steel, low alloy steel, aluminum alloy and other products. However, the application of the conventional MIG welding gun is blank in the large-thickness titanium alloy narrow gap welding at present, the main reason is that the diameter of the conventional MIG welding gun is large and is usually between 20 and 25mm, the width of a narrow gap groove is approximately between 5 and 8mm, the welding gun cannot weld in the welding groove, and the mechanical property of the welding seam is easily influenced because the crystal grain of the titanium alloy welding seam is too large due to large heat input of the MIG welding.
The titanium alloy has high chemical activity to gas under high-temperature welding conditions, is easily polluted by air, moisture, grease and the like, and reacts with oxygen, nitrogen and hydrogen in the titanium alloy, so that the plasticity and toughness of a welding joint are reduced. Under the condition of high temperature, titanium has very strong affinity with oxygen, nitrogen, hydrogen and the like, the titanium alloy without gas protection starts to absorb hydrogen at the temperature of more than 300 ℃, starts to absorb oxygen at the temperature of more than 600 ℃, starts to absorb nitrogen at the temperature of more than 700 ℃, and the hydrogen, the oxygen and the nitrogen are absorbed by the titanium alloy to cause the embrittlement of a joint, so that the hardening tendency of a welded joint is improved, the plasticity and the toughness are seriously reduced, and even a large number of pores and crack defects can occur. Therefore, a MIG/MAG welding gun of a large-thickness narrow-gap titanium alloy plate is needed to be designed.
Disclosure of Invention
In view of this, the utility model aims at providing a narrow clearance titanium alloy board MIG MAG welder of large-thickness can guarantee that the MIG welding gun head freely walks in the narrow clearance groove of large-thickness titanium alloy, and the welding wire passes through the accurate welding seam groove that arrives of super narrow clearance contact nozzle and treats the welding position, can guarantee again that the welding seam metal is protected completely by welder's gas protection device to effectual assurance crystalline grain size realizes high-quality high-efficient low-cost welding large thickness titanium alloy material.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a large-thickness narrow-gap MIG/MAG welding gun of a titanium alloy plate comprises a gun head component, a cable assembly and a European joint component which are connected in sequence, the gun head assembly comprises a conductive gun head, a 45-degree gun neck and a welding gun handle assembly which are connected in sequence, the conductive gun head comprises a two-stage conductive nozzle, a conical nozzle and a gas reinforced protection device, the two-stage conductive nozzle comprises a first-stage conventional conductive nozzle and a second-stage slender conductive nozzle which are integrally formed, the first-stage conventional conductive nozzle of the two-stage conductive nozzle is connected with a conductive nozzle seat, the conductive nozzle seat is connected with a conductive nozzle seat joint on a 45-degree gun neck through a shunt, the two-stage conductive nozzle is sleeved with a cone nozzle, a two-stage slender conductive nozzle of the two-stage conductive nozzle extends out of the cone nozzle, the gas strengthening protection device is fixed on the conical nozzle, and the upper end of the conical nozzle is in threaded connection with the 45-degree gun neck; the gas reinforced protection device comprises a baffle and two air inlet nozzles, wherein a cone nozzle connecting port for connecting with a cone nozzle is arranged at the center of the baffle, and the two air inlet nozzles are symmetrically distributed by taking the cone nozzle connecting port as the center.
Further, the welding gun handle assembly includes a front gun housing and a trigger.
Further, european style connects the subassembly including water-cooling european style plug and back rifle shell subassembly, cable assembly links to each other with water-cooling european style plug and locks through the plug-in components lock mother, establishes back rifle shell subassembly at cable assembly and water-cooling european style plug junction cover, cable assembly includes air feed pipe, cable, seal wire pipe, outlet pipe and arc control line.
Further, the length of the secondary elongated contact tip is 20mm, and the diameter of the secondary elongated contact tip is 4 mm.
Furthermore, the cone nozzle adopts a double-thread structure, an internal thread section connected with the outer wall of the 45-degree gun neck is arranged on the inner surface of the upper part of the cone nozzle, and an internal thread section connected with a cone nozzle connecting port is arranged on the outer surface of the lower part of the cone nozzle.
Furthermore, the air inlet nozzle and the baffle are arranged at an included angle of 45 degrees.
Further, welder is furnished with water cooling system, water cooling system includes water pipe and water pipe sheath, and the one end and the cable assembly intercommunication of water pipe, the other end are equipped with water injection well choke rubber end cap, set up the water pipe sheath outside the water pipe, the water pipe sheath is fixed on the back rifle shell subassembly and communicates with back rifle shell subassembly.
Furthermore, a front spring sheath and a rear spring sheath are respectively arranged at two end parts of the cable assembly.
Further, the welding gun further comprises a wire feeding hose, the wire feeding hose is sleeved in the nut, one end of the wire feeding hose is connected with the water-cooling European-type plug, and an O-shaped ring clamped with an O-shaped groove of the welding machine is arranged on the water-cooling European-type plug.
Further, a plastic gasket for avoiding electric conduction is arranged between the electric conduction nozzle base and the 45-degree gun neck.
Compared with the prior art, the MIG/MAG welding gun for the large-thickness narrow-gap titanium alloy plate has the following advantages:
1. the welding gun can bear carbon dioxide gas shielded welding within the range of welding current being less than or equal to 550A and argon and mixed gas shielded welding within the range of welding current being less than or equal to 500A;
2. the welding gun can adapt to MIG/MAG welding with a welding wire diameter of 1.2mm-1.6mm by replacing a contact tube;
3. the welding gun is additionally provided with a path of protective gas respectively in the front and the back in the advancing direction of the welding gun, so that the welding space is filled, the gas protection time is prolonged, and the gas protection effect is enhanced; meanwhile, the gas flow output from the nozzle is consistent with that of the conventional welding, and the phenomena that the arc stability is influenced and the gas protection layer turbulence is caused due to the fact that the protective gas is supercooled on the arc because the atmospheric flow is adjusted for enhancing the gas protection are avoided;
4. the welding gun is provided with the water cooling system, so that the welding gun can be ensured to weld for a long time without overheating.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
FIG. 1 is a schematic view of an overall structure of a MIG/MAG welding gun for a large-thickness narrow-gap titanium alloy plate according to an embodiment of the present invention;
FIG. 2 is an exploded view of a MIG/MAG welding gun for a large-thickness narrow-gap titanium alloy plate according to an embodiment of the present invention;
FIG. 3 is a schematic view of the overall structure of the lance tip assembly;
FIG. 4 is a cross-sectional view of the lance tip assembly;
FIG. 5 is a microstructure of a narrow gap MIG welded joint of TC4 titanium alloy.
Description of reference numerals:
the device comprises an A-cone nozzle, a B-two-stage type conductive nozzle, a C-wire feeding hose, a 1-flow divider, a 2-conductive nozzle base, a 3-plastic gasket, a 4-45-degree gun neck, a 5-trigger, a 6-front gun shell, a 7-front spring sheath, an 8-cable assembly, a 9-rear spring sheath, a 10-rear gun shell assembly, an 11-water pipe sheath, a 13-plug locking nut, a 14-water-cooled European plug, a 15-O-shaped ring, a 16-nut, a 17-water nozzle rubber plug, an 18-gas reinforced protection device, a 19-baffle, a 20-air inlet nozzle, a 21-cone nozzle connecting port, a 22-air feeding pipe, a 23-cable, a 24-wire guide pipe, a 25-water outlet pipe and a 26-arc control line.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1-4, the MIG/MAG welding gun with the large thickness and the narrow gap comprises a gun head assembly, a cable assembly 8 and a euro-type joint assembly which are sequentially connected, wherein the gun head assembly comprises a conductive gun head, a 45-degree gun neck 4 and a welding gun handle assembly which are sequentially connected, the conductive gun head comprises a two-stage conductive nozzle B, a cone nozzle a and a gas reinforcement protection device 18, the two-stage conductive nozzle B comprises a one-stage conventional conductive nozzle and a two-stage elongated conductive nozzle which are integrally formed, the one-stage conventional conductive nozzle of the two-stage conductive nozzle is connected with a conductive nozzle base 2, the conductive nozzle base 2 is connected with a conductive nozzle base joint on the 45-degree gun neck 4 through a shunt 1, the cone nozzle a is sleeved outside the two-stage conductive nozzle B, the two-stage elongated nozzle of the two-stage conductive nozzle B extends out of the cone nozzle a, the gas reinforcement protection device 18 is fixed on the cone nozzle a, the upper end of the conical nozzle A is in threaded connection with the 45-degree gun neck 4; the gas strengthening protection device 18 comprises a baffle plate 19 and two air inlet nozzles 20, wherein a cone nozzle connecting port 21 for connecting with the cone nozzle A is arranged at the center of the baffle plate 19, and the two air inlet nozzles 20 are symmetrically distributed by taking the cone nozzle connecting port 21 as the center; the air inlet nozzle 20 and the baffle plate 19 are arranged at an included angle of 45 degrees; this application design has more increased protective gas all the way around in welder direction of advance, has filled welding space, has strengthened the gas protection effect. Meanwhile, the gas flow output from the nozzle is consistent with that of conventional welding, and the arc stability is not influenced by supercooling of the protective gas to the arc due to adjustment of the atmospheric flow for enhancing gas protection;
the two air inlets 20 of the gas reinforced protection device 18 can supply gas through independent gas supply units, or can be communicated with the 45-degree gun neck 4 through a pipeline, and the original gas supply is used for providing three paths of protection gas.
This application is equipped with three routes protection gas: the welding gun neck is mainly used for welding protective gas, the gas strengthening protective device provides two paths of welding space protective gas, and the welding quality can be guaranteed.
The gun handle assembly includes a front gun housing 6 and a trigger 5. The welding gun handle component adopts a design which accords with human engineering, is based on the comfort level of holding the gun and the design of the welding posture, and ensures reasonable internal wiring, so that the gun head is more portable and is beneficial to welding operation.
European joint subassembly includes water-cooling European plug 14 and back rifle shell subassembly 10, cable assembly 8 links to each other and locks through plug-in components lock 13 with water-cooling European plug 14, establishes back rifle shell subassembly 10 at cable assembly 8 and water-cooling European plug 14 junction cover, cable assembly 8 includes air feed pipe 22, cable 23, seal wire pipe 24, outlet pipe 25 and arc control line.
The secondary elongated contact tip is a guide wire conductive design with narrow gap welding added at the front end of the conventional contact tip. This design ensures that the contact tip can extend 20mm beyond the nozzle in a standard mounting mode. And the diameter of the contact tip is 4mm, namely the ultra-narrow gap MIG welding of the titanium alloy plate with at least 5mm of gap can be ensured. The cone nozzle A is of a double-thread structure, an internal thread section connected with the outer wall of the 45-degree gun neck 4 is arranged on the inner surface of the upper portion of the cone nozzle A, and an internal thread section connected with the cone nozzle connecting port 21 is arranged on the outer surface of the lower portion of the cone nozzle A. The upper end of the conical nozzle A is designed into an internal thread, and is matched with a thread section of a 45-degree gun neck, so that the conical nozzle A can be adjusted to move up and down along the axis direction of the contact tube, the actual exposed length of the contact tube is controlled, and the conical nozzle A is suitable for welding seams with various groove depths.
The welding gun is provided with a water cooling system, the water cooling system comprises a water pipe and a water pipe sheath 11, one end of the water pipe is communicated with the cable assembly 8, the other end of the water pipe is provided with a water nozzle rubber plug 17, the water pipe sheath 11 is arranged outside the water pipe, and the water pipe sheath 11 is fixed on the rear gun shell component 10 and is communicated with the rear gun shell component 10; the welding gun is provided with the water cooling system, so that the welding gun can be ensured to weld for a long time without overheating.
And the two end parts of the cable assembly are respectively provided with a front spring sheath 7 and a rear spring sheath 9 to protect corresponding components. The welding gun further comprises a wire feeding hose C, the wire feeding hose C is sleeved in the nut 16, one end of the wire feeding hose C is connected with the water-cooling European-type plug 14, and an O-shaped ring 15 clamped with an O-shaped groove of the welding machine is arranged on the water-cooling European-type plug 14.
A plastic gasket 3 for avoiding electrical conduction is provided between the conductive nozzle base 2 and the 45 ° neck 4.
The tail socket of the welding gun is a universal socket and can be matched, installed and matched with a common welding power supply in the market for use.
The working principle of the welding gun is the same as that of the existing welding gun, and the working principle is not repeated. When the welding gun is used for welding a titanium alloy plate with the specification of 300mm multiplied by 150mm multiplied by 30mm, the truncated edge of a groove is 4mm, the gap of the groove is 5.2mm, the angle of the groove is 2 degrees, the specification of a welding wire is 1.2mm, the protective gas is pure argon, and the gas flow is 30L/min, the welding gun can find that the welding seam structure is columnar crystal from the longitudinal macroscopic morphology (as shown in figure 5) of the welding joint, and the welding joint has no welding defects such as unfused, air holes, slag inclusion and the like.
The welding gun device is reasonable and scientific in design, the deposition efficiency is improved by 40% compared with the traditional MIG welding, and the welding speed and the welding efficiency are improved by 50% compared with the traditional laser filler wire welding.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A large-thickness narrow-gap titanium alloy plate MIG/MAG welding gun is characterized in that: the gas-reinforced gas-shielded welding gun comprises a gun head assembly, a cable assembly (8) and a European-type joint assembly which are connected in sequence, wherein the gun head assembly comprises a conductive gun head, a 45-degree gun neck (4) and a welding gun handle assembly which are connected in sequence, the conductive gun head comprises a two-stage conductive nozzle (B), a cone nozzle (A) and a gas reinforcing and protecting device (18), the two-stage conductive nozzle (B) comprises an integrally formed one-stage conventional conductive nozzle and a two-stage slender conductive nozzle, the one-stage conventional conductive nozzle of the two-stage conductive nozzle is connected with a conductive nozzle seat (2), the conductive nozzle seat (2) is connected with the conductive nozzle seat on the 45-degree gun neck (4) through a shunt (1), the cone nozzle (A) is sleeved outside the two-stage conductive nozzle (B), the two-stage slender conductive nozzle of the two-stage conductive nozzle (B) extends out of the cone nozzle (A), and the gas reinforcing and protecting device (18) is fixed on the cone nozzle (A), the upper end of the conical nozzle (A) is in threaded connection with the 45-degree gun neck (4); the gas strengthening protection device (18) comprises a baffle plate (19) and two air inlet nozzles (20), wherein a cone nozzle connecting port (21) for connecting with the cone nozzle (A) is arranged at the center of the baffle plate (19), and the two air inlet nozzles (20) are symmetrically distributed by taking the cone nozzle connecting port (21) as the center.
2. A large thickness narrow gap titanium alloy plate MIG/MAG welding gun as claimed in claim 1 wherein: the welding gun handle assembly comprises a front gun shell (6) and a trigger (5).
3. A large thickness narrow gap titanium alloy plate MIG/MAG welding gun as claimed in claim 1 wherein: european joint subassembly includes water-cooling European plug (14) and back rifle shell subassembly (10), cable assembly (8) link to each other and lock through plug-in components lock mother (13) with water-cooling European plug (14), establish back rifle shell subassembly (10) at cable assembly (8) and water-cooling European plug (14) junction cover, cable assembly (8) include air feed pipe (22), cable (23), seal wire pipe (24), outlet pipe (25) and arc control line (26).
4. A large thickness narrow gap titanium alloy plate MIG/MAG welding gun as claimed in claim 1 wherein: the length of the secondary elongated contact nozzle is 20mm, and the diameter of the secondary elongated contact nozzle is 4 mm.
5. A large thickness narrow gap titanium alloy plate MIG/MAG welding gun as claimed in claim 1 wherein: the cone nozzle (A) is of a double-thread structure, an internal thread section connected with the outer wall of the 45-degree gun neck (4) is arranged on the inner surface of the upper portion of the cone nozzle (A), and an internal thread section connected with the cone nozzle connecting port (21) is arranged on the outer surface of the lower portion of the cone nozzle (A).
6. A large thickness narrow gap titanium alloy plate MIG/MAG welding gun as claimed in claim 1 wherein: the air inlet nozzle (20) and the baffle (19) are arranged at an included angle of 45 degrees.
7. A large thickness narrow gap titanium alloy plate MIG/MAG welding gun as claimed in claim 3 in which: the welder is furnished with water cooling system, water cooling system includes water pipe and water pipe sheath (11), and the one end and the cable assembly (8) intercommunication of water pipe, the other end are equipped with water injection well choke rubber end cap (17), set up water pipe sheath (11) outside the water pipe, water pipe sheath (11) are fixed on back rifle shell subassembly (10) and are linked together with back rifle shell subassembly (10).
8. A large thickness narrow gap titanium alloy plate MIG/MAG welding gun as claimed in claim 1 wherein: and a front spring sheath (7) and a rear spring sheath (9) are respectively arranged at the two end parts of the cable assembly.
9. A large thickness narrow gap titanium alloy plate MIG/MAG welding gun as claimed in claim 3 in which: the welding gun further comprises a wire feeding hose (C), the wire feeding hose (C) is sleeved in the nut (16), one end of the wire feeding hose (C) is connected with the water-cooling European-type plug (14), and an O-shaped ring (15) clamped with an O-shaped groove of the welding machine is arranged on the water-cooling European-type plug (14).
10. A large thickness narrow gap titanium alloy plate MIG/MAG weld gun according to any one of claims 1 to 9 wherein: a plastic gasket (3) for avoiding electric conduction is arranged between the electric conduction nozzle base (2) and the 45-degree gun neck (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120354220.XU CN214721346U (en) | 2021-02-08 | 2021-02-08 | Large-thickness narrow-gap titanium alloy plate MIG/MAG welding gun |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120354220.XU CN214721346U (en) | 2021-02-08 | 2021-02-08 | Large-thickness narrow-gap titanium alloy plate MIG/MAG welding gun |
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| CN214721346U true CN214721346U (en) | 2021-11-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112775523A (en) * | 2021-02-08 | 2021-05-11 | 哈尔滨焊接研究院有限公司 | Large-thickness narrow-gap titanium alloy plate MIG/MAG welding gun |
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2021
- 2021-02-08 CN CN202120354220.XU patent/CN214721346U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112775523A (en) * | 2021-02-08 | 2021-05-11 | 哈尔滨焊接研究院有限公司 | Large-thickness narrow-gap titanium alloy plate MIG/MAG welding gun |
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