CN116833524A - Welding gun for gas metal arc welding narrow gap welding - Google Patents
Welding gun for gas metal arc welding narrow gap welding Download PDFInfo
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- CN116833524A CN116833524A CN202310852487.5A CN202310852487A CN116833524A CN 116833524 A CN116833524 A CN 116833524A CN 202310852487 A CN202310852487 A CN 202310852487A CN 116833524 A CN116833524 A CN 116833524A
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- 238000003466 welding Methods 0.000 title claims abstract description 239
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 13
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- 238000009434 installation Methods 0.000 claims description 17
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 9
- 239000007769 metal material Substances 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims 1
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- 239000000463 material Substances 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 109
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- 238000010276 construction Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
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- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 1
- QZLJNVMRJXHARQ-UHFFFAOYSA-N [Zr].[Cr].[Cu] Chemical compound [Zr].[Cr].[Cu] QZLJNVMRJXHARQ-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
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Classifications
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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
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- 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
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
-
- 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
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
- B23K9/326—Purge gas rings, i.e. devices for supplying or evacuating shielding gas inside of hollow or tubular articles, e.g. pipes, vessels
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The utility model discloses a welding gun for gas metal arc welding narrow gap welding, which comprises a conductive structure, a nozzle structure and a gas holder structure, wherein the conductive structure comprises a conductive nozzle provided with a welding wire feeding channel; the nozzle structure is made of high-temperature resistant insulating materials, is sleeved outside the conductive structure, and comprises a first nozzle part and a second nozzle part connected with the first nozzle part, wherein the second nozzle part is of a flat structure; the gas support structure comprises at least one anti-collision column, the anti-collision column is arranged at the side of the second nozzle part along the length direction, a second gas supply channel for conveying protective gas is arranged in the anti-collision column in a penetrating mode along the axial direction of the anti-collision column, and the output direction of the second gas supply channel is consistent with that of the first gas supply channel. The welding gun for welding the narrow gap of the gas metal arc welding can be suitable for the narrow gap welding operation of materials with large thickness, and has the advantages of strong reliability, high safety and good stability, and greatly improves the welding quality and efficiency.
Description
Technical Field
The utility model relates to the field of welding equipment, in particular to a welding gun for welding a narrow gap by gas metal arc welding.
Background
Narrow gap welding is a method for welding materials such as steel structures in narrow groove gaps. The existing narrow gap welding method mainly comprises three welding methods, namely narrow gap argon tungsten-arc welding (NG-TIG for short), narrow gap submerged arc welding (NG-SAW for short) and narrow gap gas metal arc welding (NG-GMAW for short), and the three welding methods can play the due role only by adopting an automatic welding technology.
The NG-GMAW heat input range is wide and can be very low, so that the technology can directly weld the steel structures such as low-alloy high-strength steel or ultra-high-strength steel without adopting special procedures such as pre-welding, inter-channel temperature control, post-welding heat treatment, treatment at lower heat treatment temperature and the like. The NG-GMAW has the advantages of both the NG-SAW and the NG-TIG, has the advantages of high production efficiency, low welding cost, suitability for all-position welding, low welding heat input, small welding residual stress, small welding deformation, particular suitability for welding heat-sensitive high-strength steel, and the like, has relatively large application advantages and prospects, and also has a great research and development hot trend aiming at the NG-GMAW, such as the patent of the utility model (bulletin number: CN 202780193U), as shown in fig. 1 and 2, the device is a welding gun suitable for NG-GMAW welding, including a protective sleeve body 1, an insulating sleeve 2, a conducting rod 3 and a conducting nozzle 4, the protective sleeve body 1 is a nozzle of a hollow sleeve body, made of red copper material, the cross section is circular, the protective sleeve body 1 includes a large-size inner end 11, a small-size outer end 12 and a natural transition section 13 connecting the inner end and the outer end, the insulating sleeve 2 is in threaded connection with the inner end 11, the conducting rod 3 extends into the middle of the insulating sleeve 2 and the protective sleeve body 1 and is in threaded connection with the insulating sleeve 2, the conducting nozzle 4 is connected at the front end of the conducting rod 3 and is arranged in the protective sleeve body 1, a vent hole 31 for discharging CO2 is formed in the conducting rod 3, the vent hole 31 is positioned at the inner end 11 of the large-size, the gun head is convenient to cool, the CO2 is sprayed out from the outside through the outer end 12 of the small-size, and the welding wire sequentially extends out of the outer end through the conducting rod 3 and the conducting nozzle 4.
In actual production, although the NG-GMAW is most developed and researched, commercial application is less, and particularly large-scale application cannot be truly obtained in the field of welding of large-thickness materials, and the main reason is that the existing welding gun suitable for NG-GMAW welding has the following defects and cannot truly meet the requirements of actual welding:
(1) Because the protective gas can ensure that the welding pool always has good protective gas effect in the welding process only when the protective gas is sent to the condition close to the arc of the welding pool as much as possible, the nozzle of the welding gun needs to extend into the groove as much as possible, but the outer end of the existing nozzle is of a circular section, the radial width is large, and the depth of the outer end of the nozzle extending into the groove is shallower under the condition that the radial width does not exceed the standard narrow gap range of the groove, so that the protective gas is difficult to send to a deeper position;
(2) Because the welded groove is deep and narrow, under the condition that the standard narrow gap range of the groove is not exceeded, the gap between the outer end of the nozzle and the inner part of the groove is very narrow, the movement of the welding wire in the groove is seriously hindered by the outer end of the nozzle, the arc coverage is very limited, and the welding wire cannot be accurately and stably directed to a side wall fusion area, so that the heat input quantity to the side wall is insufficient, the defect of poor side wall fusion is generated, and the welding quality is influenced;
(3) Because the gap between the outer end of the nozzle and the groove is smaller, the gap is easily blocked after the splash large particles generated in the welding process are adhered to the side wall of the welding groove, and the welding gun is blocked due to moving and clamping, so that the welding process is blocked and even the welding gun is damaged;
(4) The splash particles generated in the welding process are easy to gather on the conducting nozzle, the protective gas channel and the nozzle, so that the protective gas channel is narrowed and even blocked, the ejection of the protective gas is influenced, the wire feeding of the welding wire is seriously blocked, the welding is interrupted, and in addition, the nozzle is made of a red copper conductive material, so that the splash particles generated in the welding process gather among the conducting nozzle, the nozzle and the workpiece, short circuit is easy to occur, the welding gun is burnt, and the welding is interrupted.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the welding gun for welding the narrow gap by using the gas metal arc welding, which can be suitable for the narrow gap welding operation of materials with large thickness, has strong reliability, high safety and good stability, and greatly improves the welding quality and efficiency.
The utility model discloses a welding gun for welding a narrow gap in gas metal arc welding, which comprises a conductive structure, a nozzle structure and a gas holder structure, wherein the conductive structure comprises a conductive nozzle provided with a welding wire feeding channel; the nozzle structure is made of high-temperature resistant insulating materials, is sleeved outside the conductive structure and comprises a first nozzle part and a second nozzle part connected with the first nozzle part, the second nozzle part is of a flat structure, a first air supply channel for conveying protective gas is arranged on the first nozzle part and the second nozzle part in a penetrating way along the axial direction of the first nozzle part and the second nozzle part, and the conductive nozzle sequentially penetrates through the first nozzle part and the second nozzle part after being installed and stretches out of the second nozzle part; the gas support structure comprises at least one anti-collision column, the anti-collision column is arranged at the side of the second nozzle part along the length direction, a second gas supply channel for conveying protective gas is arranged in the anti-collision column in a penetrating mode along the axial direction of the anti-collision column, and the output direction of the second gas supply channel is consistent with that of the first gas supply channel.
Preferably, the anti-collision columns are at least two, the two anti-collision columns are respectively arranged at two sides of the second nozzle part along the length direction, and one sides of the two anti-collision columns, which are oppositely arranged with the nozzle structure, are respectively provided with a protection surface matched with the outer side surface of the nozzle structure.
Preferably, the air support structure further comprises a mounting platform, wherein a mounting channel for sleeving the nozzle structure is arranged on the mounting platform in a penetrating manner along the axial direction of the mounting platform, and the anti-collision column is connected to the mounting platform and is arranged outside the mounting channel; the anti-collision post comprises a first post part and a second post part, wherein the first post part is arranged on one side of the protruding installation platform, the second post part is arranged on the other side of the protruding installation platform, one end, far away from the installation platform, of the first post part is provided with a gas connecting part for butting an external auxiliary gas supply mechanism, one end, far away from the installation platform, of the second post part is provided with a gas spraying part for spraying protective gas, and the distance between the outlet end plane of the gas spraying part and the plane of the extending end of the welding wire is smaller than the distance between the outlet end plane of the second nozzle part and the plane of the extending end of the welding wire.
Preferably, the middle nozzle base that still is equipped with protrusion mounting platform one side of mounting platform, the nozzle base wears to be equipped with the base passageway that link up mutually with the installation passageway along its axial, first nozzle portion suit is in base passageway and installation passageway, pass through fastener fixed connection between first nozzle portion and the nozzle base, the nozzle base wears to be equipped with along its radial and supplies the fastener to stretch into the fastening passageway in the base passageway, the second nozzle portion is arranged in one side that the mounting platform kept away from the nozzle base, first post portion is arranged in the base passageway outside, the guard surface sets up in the second post portion is inboard.
Preferably, the end face of the second post portion far away from the one end of the mounting platform is flush with or substantially flush with the end face of the second nozzle portion far away from the one end of the mounting platform, the gas spraying portion extends out of the end face of the second post portion far away from the one end of the mounting platform, and the protection surface is flush with the inner wall of the mounting channel and extends from the end portion of the second post portion near the one end of the mounting platform to the end portion far away from the one end of the mounting platform.
Preferably, two outer side surfaces that the second nozzle portion was arranged along width direction set up to the planar structure that is parallel to each other, two outer side surfaces that the second nozzle portion was arranged along length direction set up to the arc surface structure, the outer side surface of first nozzle portion is provided with cylindrical surface structure and inclined plane structure, the arc surface structure links to each other with cylindrical surface structure, and flushes mutually, planar structure passes through inclined plane structure with cylindrical surface structure and links to each other, the guard surface sets up to the first cambered surface structure with cylindrical surface structure and arc surface structure assorted.
Preferably, the second column part comprises a second column body and a second column reinforcing block, the distance between two outer side surfaces of the second column body arranged along the width direction of the second nozzle part is the same or basically the same as the distance between two outer side surfaces of the second nozzle part arranged along the width direction, two adjacent sides on the second column reinforcing block are respectively connected with the side surface of the mounting platform far away from the nozzle base and the side surface of the second column body arranged along the width direction of the second nozzle part, and the distance between the second column reinforcing block and the second nozzle part is larger than the distance between one end part of the inclined plane structure close to the mounting platform and the second nozzle part; the lateral surface of second post portion flushes with mounting platform periphery side.
Preferably, the conductive structure further comprises a conductive rod, an adapter and a conductive connecting part for butting an external wire feeding mechanism, one end of the conductive rod is connected with the conductive nozzle, the other end of the conductive rod is connected with the conductive connecting part, the conductive rod is radially provided with a gas channel for outputting protective gas in a penetrating mode, the adapter stretches into the first nozzle part to be detachably connected with the nozzle structure, the conductive connecting part is detachably connected with the adapter, and the conductive rod is arranged in the first nozzle part after installation.
Preferably, the nozzle structure is made of ceramic material, and the air support structure is made of metal material.
Preferably, the outer diameter of the second nozzle part in the width direction is X1, wherein X1 is more than or equal to 9mm and less than or equal to 14mm; the inner diameter of the second nozzle part in the width direction is X2, wherein X2 is more than or equal to 5mm and less than or equal to 8mm; the outer diameter of the second nozzle part in the length direction is Y1, wherein Y1 which is more than or equal to 16mm and less than or equal to 25mm; the length of the conductive structure extending out of the second nozzle part is Z, wherein Z is more than or equal to 3mm and less than or equal to 12mm.
The consumable electrode gas shield welding narrow gap welding gun disclosed by the utility model has the following beneficial effects:
(1) The second nozzle part is of a flat structure, so that the cross section width of the second nozzle part is narrowed, on one hand, the second nozzle part can extend into deeper positions in the groove more easily, so that a good gas protection effect is realized in the welding process, welding areas such as molten drops, a welding pool and a welding area high-temperature metal workpiece are prevented from being polluted by air, the welding quality is improved, the width arrangement of the welding groove can be greatly reduced to enable the welding groove to reach the standard range of narrow-gap welding, the welding filling quantity is greatly reduced, and the actual welding requirement of a large-thickness narrow-gap groove is met; on the other hand, the gap width between the second nozzle part and the side wall of the groove is increased, the movement of the second nozzle part in the groove is more free, so that the welding wire is more easily directed to the welding line, the side wall of the groove is heated, the welding seam is well fused, the restraint effect of the inner side of the groove on shielding gas can be enhanced when the second nozzle part with a flat structure is applied to a construction site of the welding groove with the width greatly reduced, the compression operation of the shielding gas on the arc after being sprayed out of the nozzle structure is facilitated, the energy density of the arc is improved, the heating effect of the arc on the side wall of the groove is enhanced, the welding seam is well fused, the welding seam is attractive and uniform in shape, the welding gun is prevented from being blocked or damaged due to the aggregation of splash large particles in the welding process in the gap, the service life of the welding gun is prolonged, the consumption of consumable parts such as a conductive nozzle, the nozzle structure and the like can be reduced, the consumption of the consumable parts such as the conductive nozzle and the nozzle structure can be reduced, the replacement time of the consumable parts such as the conductive nozzle and the nozzle structure can be reduced, and the welding cost can be reduced while the welding efficiency is improved;
(2) The nozzle structure is made of the high-temperature-resistant insulating material, so that risks such as short circuit, welding gun burning loss, welding interruption and the like caused by the fact that splash small particles gather between the nozzle structure and the conducting nozzle or the welding wire in the welding process can be prevented, the safety, reliability and stability of the welding gun are improved, and the welding efficiency is improved;
(3) The conducting nozzle is arranged outside the second nozzle part, and the standard value of the welding wire extending outside the conducting nozzle is 15-20mm, so that compared with the conducting nozzle which is hidden in the second nozzle part, the length of the welding wire extending outside the nozzle structure is longer, the width arrangement of a welding groove can be further reduced, the welding filling quantity is further reduced, the welding nozzle is more suitable for narrow-gap groove welding operation, the distance between the outlet end of the nozzle structure and a welding pool is greatly prolonged, welding particles splashed in the welding process can be further prevented from being gathered in the conducting nozzle, the nozzle structure, the first air supply channel or the second air supply channel, so that the air supply channel is narrowed or even blocked, the welding interruption and other risks are caused, the stability of the air protection effect is improved, the welding quality and the welding efficiency are improved, and the service life of a welding gun is prolonged;
(4) By arranging the anti-collision column at the side of the second nozzle part along the length direction, the nozzle structure can be prevented from being damaged due to accidental collision, and the welding quality is prevented from being influenced; the second air supply channel is arranged in the anti-collision column, and the output direction of the second air supply channel is consistent with that of the first air supply channel, so that the output amount of shielding gas is increased, the gas protection effect is enhanced, meanwhile, the shielding gas output by the second air supply channel can block the shielding gas output by the first air supply channel to the inner side of the second air supply channel to a certain extent, so that external air is expelled or isolated, the shielding gas output by the first air supply channel can be guided and assisted to be fed into a welding area as much as possible, the gas protection effect of the welding area is enhanced, the welding quality is improved, the splashing amount of welding particles in the welding process can be reduced to a certain extent, and risks such as narrowing and blocking of the shielding gas channel, wire feeding blocking, welding gun short circuit burning loss, welding gun movement blocking or welding interruption caused by adhesion of welding splashing particles to a nozzle structure, a gas holder structure, welding wires or workpieces are further reduced.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
fig. 1 is a schematic cross-sectional view of a small groove welding auxiliary device disclosed in the prior art.
Fig. 2 is a schematic exploded view of a small groove welding auxiliary device disclosed in the prior art.
Fig. 3 is a schematic diagram of the overall structure of a welding gun for gas metal arc welding with narrow gap according to an embodiment of the present utility model.
Fig. 4 is a schematic exploded view of a welding gun for gas metal arc welding with narrow gap according to an embodiment of the present utility model.
Fig. 5 is a schematic longitudinal cross-sectional view of a consumable electrode gas shield narrow gap welding gun according to one embodiment of the present utility model.
Fig. 6 is a schematic diagram showing a longitudinal cross section of a welding gun for gas metal arc welding with narrow gap according to an embodiment of the present utility model.
FIG. 7 is a schematic cross-sectional view of a consumable electrode gas shield narrow gap welding gun according to one embodiment of the present utility model.
Fig. 8 is a schematic structural view of a nozzle structure according to an embodiment of the present utility model.
Fig. 9 is a schematic structural diagram of a gas holder structure according to an embodiment of the present utility model.
Fig. 10 is a reference diagram of a usage state of a welding gun for welding a narrow gap gas metal arc welding in a construction site according to an embodiment of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact, but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.
As shown in fig. 3-9, as one embodiment of the present utility model, a consumable electrode gas shield narrow gap welding gun is disclosed, comprising a conductive structure 100, a nozzle structure 200, and a gas holder structure 300, wherein the conductive structure 100 can be used for the conduction of welding wire, and welding wire and CO 2 The conducting structure 100 comprises a conducting nozzle 110 provided with a wire feeding channel 101 of a welding wire 400, and the width of the wire feeding channel 101 in the conducting nozzle 110 is matched with the width of the welding wire 400 to draw the welding wire 400 and conduct electricity in contact with the welding wire 400. The nozzle structure 200 can be used for spraying protective gas, the nozzle structure 200 is sleeved outside the conductive structure 100 and comprises a first nozzle part 210 and a second nozzle part 220 connected with the first nozzle part 210, the first nozzle part 210 and the second nozzle part 220 are axially provided with a first air supply channel 201 for conveying the protective gas in a penetrating way, the nozzle structure 200 is arranged into a hollow cylinder structure, and the first air supply channel 201 is arranged into a nozzle structure 200, the conductive structure 100 is sleeved in the hollow part, and a gap is reserved between the conductive structure 100 and the inner wall of the nozzle structure 200, so that the protective gas can enter the first gas supply channel 201 through the gas channel 102 and be sprayed out to the outside through the outlet end of the first gas supply channel 201. The width direction and the length direction of the second nozzle part 220 are respectively arranged along the radial direction of the nozzle structure 200, the thickness direction of the contracted flat structure is the width direction of the second nozzle part 220, the length direction of the second nozzle part 220 is arranged perpendicular to the width direction thereof, and the length direction of the second nozzle part 220 is the traveling direction thereof. As shown in fig. 10, the mounted contact tip 110 sequentially passes through the first nozzle part 210 and the second nozzle part 220 and extends out of the outlet end of the second nozzle part 220, the welding wire 400 extends out of the outlet end of the contact tip 110 through the wire feeding channel 101, and shielding gas is sprayed out from the outlet end of the second nozzle part 220 to protect welding areas such as molten drops, a welding pool, a welding area high-temperature metal workpiece 500 and the like at the end of the extending welding wire 400 from air pollution, thereby achieving a gas shielding effect and ensuring welding quality. The gas holder structure 300 includes at least one collision post 310, the collision post 310 is disposed at a side of the second nozzle part 220 along the length direction, and a second gas supply channel 301 for supplying a shielding gas is disposed in the collision post 310 along the axial direction thereof, and the second gas supply channel 301 is consistent with the output direction of the first gas supply channel 201.
In the present embodiment, the second nozzle portion 220 is provided in a flat structure, thereby narrowing the cross-sectional width of the second nozzle portion 220. On the one hand, the welding groove can extend into deeper positions in the groove more easily, so that a good gas protection effect is realized in the welding process, the welding area is prevented from being polluted by air, the welding quality is improved, the width of the welding groove can be greatly reduced, the welding groove can reach the standard range of narrow-gap welding, the welding filling quantity is greatly reduced, and the actual welding requirement of a large-thickness narrow-gap groove is met. On the other hand, the gap width between the second nozzle part 220 and the groove side wall is increased, the movement of the second nozzle part 220 in the groove is more free, the directivity of the welding wire 400 in the welding groove is enhanced, the arc is easier to point to the welding line, the groove side wall is heated, good welding seam fusion is ensured, the restraint effect of the inner side of the groove on shielding gas can be enhanced when the second nozzle part 220 with a flat structure is applied to a welding groove construction site with the width greatly reduced, the compression operation of the arc after the shielding gas is sprayed out from the nozzle structure 200 is facilitated, the energy density of the arc is improved, the heating effect of the arc on the groove side wall is enhanced, the welding seam fusion is further ensured to be good, the welding seam molding is attractive and uniform, in addition, the moving clamping of a welding gun, the blocking or the damage of the welding gun caused by the splashing large particles in the welding process can be prevented, and the service life of the welding gun is prolonged. The consumption of consumable parts such as the contact tip and the nozzle structure can be reduced by low splashing, the consumption of the consumable parts can be reduced, the replacement time of the consumable parts such as the contact tip and the nozzle structure can be reduced, and the welding cost can be reduced while the welding efficiency is improved.
In this embodiment, the nozzle structure 200 is made of a high-temperature-resistant insulating material, so that risks such as short circuit, burning loss of a welding gun, and interruption of welding caused by aggregation of small splash particles between the nozzle structure 200 and the contact tip 110 or the welding wire 400 in the welding process can be prevented, safety, reliability and stability of the welding gun are improved, and welding efficiency is improved.
In this embodiment, since the contact tip 110 extends out of the second nozzle portion 220 and the standard value of the welding wire 400 extending out of the contact tip 110 is 15-20mm, compared with hiding the contact tip 110 in the second nozzle portion 220, the length of the welding wire 400 extending out of the nozzle structure 200 is longer, so that the welding groove width arrangement can be further reduced, the welding filling amount is further reduced, the welding method is more suitable for narrow gap groove welding operation, the distance between the outlet end of the nozzle structure 200 and the welding pool is greatly prolonged, the welding quality is further prevented from being influenced by narrowing or even blocking of the welding channel due to the fact that welding particles splashed in the welding process are gathered in the contact tip 110, the nozzle structure 200, the first air supply channel 201 or the second air supply channel 301, or risks such as wire feeding blocking and welding interruption are caused, the stability of the air protection effect is improved, the welding quality and the efficiency are improved, and the service life of the welding gun is prolonged.
In the present embodiment, by disposing the bump post 310 at the side of the second nozzle portion 220 disposed in the length direction, it is possible to prevent the nozzle structure 200 from being damaged by an accidental collision, affecting the welding quality. The second air supply passage 301 is provided in the anti-collision post 310, and the output direction of the second air supply passage 301 is identical to that of the first air supply passage 201, so that the shielding effect of the shielding gas is enhanced, and at the same time, the shielding gas output through the second air supply passage 301 can block the shielding gas output through the first air supply passage 201 to the inner side to a certain extent, so that the outside air is expelled or isolated, the shielding gas output from the first air supply passage 201 can be guided and assisted to be fed into a welding area as much as possible, so that the gas shielding effect of the welding area is enhanced, the welding quality is improved, the splashing amount of welding particles in the welding process can be reduced to a certain extent, and the risks of narrowing or blocking the shielding gas passage, wire feeding blocking, gun short-circuiting and burning loss, gun moving blocking or welding interruption and the like caused by the adhesion of welding splashing particles to the nozzle structure 200, the gas support structure 300, the welding wire 400 or the workpiece 500 can be further reduced.
As shown in fig. 5, in some embodiments, two anti-collision posts 310 are provided, two anti-collision posts 310 are respectively disposed at two sides of the second nozzle portion 220 in the length direction, in this embodiment, two anti-collision posts 310 are respectively disposed at two sides of the second nozzle portion 220 along the length direction, and two anti-collision posts 310 are respectively disposed at front and rear sides of the nozzle structure 200 in the running direction during operation, so as to ensure narrow gap groove welding operation, and can block the shielding gas output through the first air supply channel 201 between the shielding gases output through the second air supply channels 301 at two sides, further expel or isolate external air, so as to guide and assist the shielding gas output from the first air supply channel 201 to be fed into the welding area as much as possible, enhance the air protection effect, further reduce the splashing amount of welding particles during welding, and improve the welding quality and efficiency. Alternatively, the left and right end portions of the two anti-collision posts 310 protrude outside the left and right end portions of the second nozzle portion 220, respectively, so that the second nozzle portion 220 can be prevented from being damaged due to collision in four directions. In other embodiments, two, three, or even more bumper posts 310 may be disposed on two sides of the second nozzle portion 220 along the length direction, so as to enhance the bumper effect. The two anti-collision posts 310 are respectively provided with a protection surface 3121 matched with the outer side surface of the nozzle structure 200 on the side opposite to the nozzle structure 200, so as to better protect the nozzle structure 200 from collision.
As shown in fig. 6, in some embodiments, the air supporting structure 300 further includes a mounting platform 320, the mounting platform 320 is provided with a mounting channel 321 for sleeving the nozzle structure 200 along an axial direction of the mounting platform 320, the mounting channel 321 is located at a central position of the mounting platform 320, the anti-collision post 310 is connected to the mounting platform 320 and is arranged outside the mounting channel 321, the structure is simple, the processing is convenient, the anti-collision post 310 and the mounting platform 320 are integrally formed, the structure is stable and firm, and the assembly or the disassembly is convenient and quick.
As shown in fig. 9, in some embodiments, the anti-collision post 310 includes a first post portion 311 provided at one side of the protruding mounting platform 320, and a second post portion 312 provided at the other side of the protruding mounting platform 320, a gas connection portion 314 for abutting against an external auxiliary gas supply mechanism is provided at one end of the first post portion 311 remote from the mounting platform 320, a gas injection portion 313 for injecting a shielding gas is provided at one end of the second post portion 312 remote from the mounting platform 320, and the second gas supply passage 301 is provided to sequentially penetrate through the gas connection portion 314, the first post portion 311, the mounting platform 320, the second post portion 312, and the gas injection portion 313, and the shielding gas outputted from the external auxiliary gas supply mechanism is outputted to the outside through the second gas supply passage 301 in the gas connection portion 314, the first post portion 311, the mounting platform 320, the second post portion 312, and the gas injection portion 313. The distance between the gas ejection part outlet end plane 3010 and the wire extending end plane 401 is smaller than the distance between the second nozzle part outlet end plane 2010 and the wire extending end plane 401, that is, the ejection position of the second air supply passage 301 is further outside than the ejection position of the first air supply passage 201, so that it is more advantageous to isolate the shielding gas output through the first air supply passage 201 inside thereof by the shielding gas output through the second air supply passage 301, to guide and assist the shielding gas output from the first air supply passage 201 to be fed into the welding area as much as possible, and to enhance the gas shielding effect.
In some embodiments, a nozzle base 322 protruding from one side of the mounting platform 320 is further disposed in the middle of the mounting platform 320, the nozzle base 322 is configured as an annular structure, and has a base channel 3221 penetrating through the mounting channel 321 along the axial direction thereof, and the first nozzle portion 210 is sleeved in the base channel 3221 and the mounting channel 321. The first nozzle portion 210 is fixedly connected with the nozzle base 322 through the fastening piece 600, the fastening channel 3222 for the fastening piece 600 to extend into the base channel 3221 is penetrated through the nozzle base 322 along the radial direction of the nozzle base, the air supporting structure 300 and the nozzle structure 200 extend into the fastening channel 3222 from the fastening channel 3222 through the fastening piece 600 and are abutted against or connected with the outer side wall of the first nozzle portion 210 to be fastened and connected, the disassembly is convenient, and the nozzle structure 200 with different models can be replaced conveniently to adapt to different welding requirements. The second nozzle part 220 is disposed at a side of the mounting platform 320 remote from the nozzle base 322, so as to extend into the welding groove for welding operation. The first post portion 311 is disposed outside the base channel 3221, the protection surface 3121 is disposed inside the second post portion 312, and the nozzle structure 200 is protected and restrained by the protection surface 3121, the mounting channel 321 and the base channel 3221 together, and the connection is stable and the anti-collision effect is good.
In some embodiments, as shown in fig. 5, the end surface of the second post 312 remote from the mounting platform 320 is flush or substantially flush with the end surface of the second nozzle 220 remote from the mounting platform 320, wherein the vertical distance between the substantially flush and the flush is-2 mm, so as to ensure that the protection surface 3121 has a complete anti-collision protection effect on the second nozzle 220. Of course, in other embodiments, the end surface of the second post 312 remote from the mounting platform 320 may also be substantially larger or smaller than the end surface of the second nozzle portion 220 remote from the mounting platform 320, which may also provide a degree of anti-collision effect on the nozzle structure 200. The gas spraying portion 313 extends out of the end surface of the second post portion 312 far away from the end of the mounting platform 320, the protection surface 3121 is flush with the inner wall of the mounting channel 321, and extends from the end of the second post portion 312 near the end of the mounting platform 320 to the end far away from the end of the mounting platform 320, that is, the protection surface 3121 is the whole inner side surface of the second post portion 312, so that it is further ensured that the protection surface 3121 has a relatively complete anti-collision protection effect on the second nozzle portion 220, and in other embodiments, the protection surface 3121 may be only a part of the inner side surface of the second post portion 312, and also may perform anti-collision protection on the nozzle structure 200.
As shown in fig. 8, in some embodiments, two outer sides of the second nozzle 220 along the width direction are set to be parallel to each other and are set to be a plane structure 221, two outer sides of the second nozzle 220 along the length direction are set to be an arc surface structure 222, the outer side of the first nozzle 210 is set to be a cylindrical surface structure 211 and an inclined plane structure 212, the arc surface structure 222 is connected with the cylindrical surface structure 211 and is flush with the cylindrical surface structure 211, so as to ensure the flatness of the outer surface of the nozzle 200, and the second nozzle 220 can be extended into a welding groove during welding. The plane structure 221 is connected with the cylindrical surface structure 211 through the inclined plane structure 212, so that the overall structure is simple in design, production and processing are convenient, the inclined plane structure 212 can be further extended into a welding groove for operation, and the depth of the nozzle structure 200 extending into the welding groove is increased. As shown in fig. 9, the protection surface 3121 is set to a first arc structure matching with the cylindrical surface structure 211 and the arc surface structure 222, the inner wall of the installation channel 321 is set to an inner cylindrical arc structure matching with the cylindrical surface structure 211, the arc surface design is more uniformly stressed, the anti-collision effect is better, the protection surface 3121 is flush with the inner wall of the installation channel 321, the structure is simple, and the installation channel is more matched with the nozzle structure 200. In addition, the outer circumferential side of the mounting platform 320 is set to an outer cylindrical arc surface structure, and the side of the second column portion 312 opposite to the nozzle structure 200 is set to a second arc surface structure 3122 matching with the outer circumferential side of the mounting platform 320, so as to avoid scratch with objects such as the workpiece 500, and optionally, the outer side of the second column portion 312 is flush with the outer circumferential side of the mounting platform 320, so as to ensure the flatness of the outer side of the air supporting structure 300. The two inner sides of the second nozzle portion 220 arranged along the width direction and the two inner sides of the second nozzle portion 220 along the length direction are connected in pairs and enclose to form an inner ring structure, the inner ring structure and the outer ring structure are coaxially arranged and arranged in equal proportion, and the inner side of the first nozzle portion 210 and the outer side of the first nozzle portion 210 are coaxially arranged and arranged in equal proportion, so that the processing is facilitated.
As shown in fig. 9, in some embodiments, the second column part 312 includes a second column body 3123 and a second column reinforcing block 3124, and the distance between two outer side surfaces of the second column body 3123 arranged in the width direction of the second nozzle part 220 is the same or substantially the same as the distance between two outer side surfaces of the second nozzle part 220 arranged in the width direction, and the difference between substantially the same and the same is-2 to 2mm, so that the protection surface 3121 has a more complete anti-collision protection effect on the second nozzle part 220. Adjacent sides of the second column reinforcement block 3124 are respectively connected to a side surface of the mounting platform 320 remote from the nozzle base 322 and a side surface of the second column body 3123 disposed in the width direction of the second nozzle part 220, and have functions of reinforcing the connection strength of the second column body 3123 with the mounting platform 320 and increasing the protection surface 3121. The distance between the second column reinforcing block 3124 and the second nozzle part 220 is greater than the distance between the second nozzle part 220 and the end of the inclined plane structure 212 near the mounting platform 320, i.e. the second column reinforcing block 3124 is arranged on one side of the inclined plane structure 212 near the mounting platform 320, so that the second column reinforcing block 3124 is prevented from obstructing the planar structure 221 and the inclined plane structure 212 from extending into the groove.
As shown in fig. 4, in some embodiments, the conductive structure 300 further includes a conductive rod 120, an adapter 140, and a conductive connection part 130 for interfacing with an external wire feeding mechanism, one end of the conductive rod 120 is connected to the conductive tip 110, the other end of the conductive rod 120 is connected to the conductive connection part 130, wire feeding channels 101 are respectively provided in the conductive connection part 130 and the conductive rod 120 along the axes thereof, and a welding wire 400 outputted through the external wire feeding mechanism sequentially passes through the conductive connection part 130, the conductive rod 120, and the conductive tip 110 to protrude outside the outlet end of the conductive tip 110. The conductive rod 120 is radially provided with a gas channel 102 for outputting shielding gas, the gas channel 102 is communicated with the wire feeding channel 101, the gas channel 102 is communicated with the first air feeding channel 201 after installation, and the shielding gas is output to the first air feeding channel 201 through the gas channel 102 and then is sprayed out from the outlet end of the nozzle structure 200. The width of the wire feeding channel 101 in the conductive connecting portion 130 and the conductive rod 120 is larger than the width of the welding wire 400, so as to allow the shielding gas outputted from the external gas feeding mechanism to sequentially pass through the wire feeding channel 101 and the gas channel 102 in the conductive connecting portion 130 and the conductive rod 120 and to input and output the shielding gas into the first gas feeding channel 201. The adaptor 140 is configured as a cylindrical structure, the outer wall of the adaptor 140 is in threaded connection with the inner wall of the first nozzle portion 210, and the conductive connection portion 130 is in threaded connection with the inner wall of the adaptor 140, so as to be convenient to detach and replace, so as to match the nozzle structures 200 of different types, however, in other embodiments, the adaptor 140 and the first nozzle portion 210 or the adaptor 140 and the conductive connection portion 130 may be detachably connected by screws, buckles, or other manners. The post-installation conductive rod 120 is disposed in the first nozzle part 210, the conductive rod 120 and the conductive nozzle 110 are disposed in the first air supply passage 201, and the conductive nozzle 110 passes through the second nozzle part 220 and protrudes outside the second nozzle part 220, so that the shielding gas is sprayed at a high speed through the second nozzle part 220 of the flat structure after entering the first air supply passage 201 in the first nozzle part 210 through the gas passage 102. The two side walls of the second nozzle part 220 arranged in the width direction are respectively arranged close to two sides of the contact tip 110, and the interval distance between the two side walls of the second nozzle part 220 arranged in the length direction is larger than the interval distance between the two side walls of the second nozzle part 220 arranged in the width direction, so that enough interval gaps can be reserved between the second nozzle part 220 and the contact tip 110, the passage of protective gas is allowed, and the gas protection effect is ensured.
In some embodiments, the nozzle structure 200 is made of ceramic material, which has excellent high temperature resistance, corrosion resistance and mechanical strength, and in other embodiments, the nozzle structure 200 may be made by spraying a ceramic insulating material outside a metal material, or by using other high temperature resistant insulating materials with high temperature resistance and insulation, which can prevent the risk of short circuit of a welding gun and interruption of welding. The air support structure 300 is made of a metal material, such as copper, brass, chromium-zirconium-copper, and the like, and has high strength, so that the nozzle structure 200 can be protected from being damaged due to accidental collision.
As shown in FIGS. 5 and 7, in some embodiments, the second nozzle portion 220 has an outer diameter X1 in the width direction, wherein 9 mm.ltoreq.X1.ltoreq.14 mm, preferably 9 mm.ltoreq.X1.ltoreq.10 mm, enabling high quality narrow gap welding. The inner diameter of the second nozzle 220 in the width direction is X2, wherein X2 is more than or equal to 5mm and less than or equal to 8mm, preferably, X2 is more than or equal to 5mm and less than or equal to 6mm, so that a tiny movable gap is reserved between the inner wall of the second nozzle 220 and the conductive seat 110, the conductive nozzle is convenient to assemble and disassemble, and the conductive nozzle 110 is prevented from being crashed into the nozzle structure 200. The outer diameter of the second nozzle portion 220 in the length direction is Y1, wherein Y1 is 16mm or less and 25mm or less, preferably Y1 is 20mm or less and 25mm or less; the second nozzle part 220 has an inner diameter Y2 in the length direction, wherein Y2 is greater than or equal to 14mm and less than or equal to 23mm, preferably Y2 is greater than or equal to 18mm and less than or equal to 23mm, and can ensure sufficient output of the shielding gas while facilitating free movement of the nozzle structure 200 within the groove. The length of the contact tip 110 extending beyond the second nozzle portion 220 is Z, wherein Z is 3mm < 12mm, preferably 3mm < Z < 7mm, which can ensure that shielding gas is delivered as close to the weld puddle as possible while substantially elongating the distance between the outlet end of the nozzle structure 200 and the weld puddle.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
In summary, the foregoing description is only of the preferred embodiments of the present utility model, and all equivalent changes and modifications made in accordance with the claims should be construed to fall within the scope of the utility model.
Claims (10)
1. A consumable electrode gas shield narrow gap welding gun, comprising:
the conductive structure comprises a conductive nozzle provided with a welding wire feeding channel;
the nozzle structure is made of a high-temperature-resistant insulating material, is sleeved outside the conductive structure, comprises a first nozzle part and a second nozzle part connected with the first nozzle part, wherein the second nozzle part is of a flat structure, a first air supply channel for conveying protective gas is arranged on the first nozzle part and the second nozzle part in a penetrating way along the axial direction of the first nozzle part and the second nozzle part, and the conductive nozzle sequentially penetrates through the first nozzle part and the second nozzle part after being installed and stretches out of the second nozzle part;
the gas support structure comprises at least one anti-collision column, the anti-collision column is arranged at the side of the second nozzle part along the length direction, a second gas supply channel for conveying protective gas is arranged in the anti-collision column in a penetrating mode along the axial direction of the anti-collision column, and the output direction of the second gas supply channel is consistent with that of the first gas supply channel.
2. The consumable electrode gas shield welding narrow gap welding torch of claim 1, wherein: the anti-collision posts are at least two, the two anti-collision posts are respectively arranged on two sides of the second nozzle part along the length direction, and one sides of the two anti-collision posts, which are oppositely arranged with the nozzle structure, are respectively provided with a protection surface matched with the outer side surface of the nozzle structure.
3. The consumable electrode gas shield welding narrow gap welding torch of claim 2, wherein: the air support structure further comprises a mounting platform, a mounting channel for sleeving the nozzle structure is formed in the mounting platform in a penetrating mode along the axial direction of the mounting platform, and the anti-collision column is connected to the mounting platform and is arranged outside the mounting channel;
the anti-collision post comprises a first post part and a second post part, wherein the first post part is arranged on one side of the protruding installation platform, the second post part is arranged on the other side of the protruding installation platform, one end, far away from the installation platform, of the first post part is provided with a gas connecting part for butting an external auxiliary gas supply mechanism, one end, far away from the installation platform, of the second post part is provided with a gas spraying part for spraying protective gas, and the distance between the outlet end plane of the gas spraying part and the plane of the extending end of the welding wire is smaller than the distance between the outlet end plane of the second nozzle part and the plane of the extending end of the welding wire.
4. The consumable electrode gas shield welding narrow gap welding torch of claim 3, wherein: the novel spray nozzle is characterized in that a nozzle base protruding out of one side of the mounting platform is further arranged in the middle of the mounting platform, a base channel communicated with the mounting channel is arranged on the nozzle base in a penetrating mode along the axial direction of the nozzle base, a first nozzle portion is sleeved in the base channel and the mounting channel, the first nozzle portion is fixedly connected with the nozzle base through a fastening piece, the nozzle base is radially provided with a fastening channel for the fastening piece to extend into the base channel in a penetrating mode, a second nozzle portion is arranged on one side, far away from the nozzle base, of the mounting platform, a first column portion is arranged on the outer side of the base channel, and a protection surface is arranged on the inner side of a second column portion.
5. The consumable electrode gas shield welding narrow gap welding torch of claim 4, wherein: the end face of the second column part far away from one end of the mounting platform is flush with or basically flush with the end face of the second nozzle part far away from one end of the mounting platform, the gas spraying part extends out of the end face of the second column part far away from one end of the mounting platform, and the protection surface is flush with the inner wall of the mounting channel and extends from the end part of the second column part close to one end of the mounting platform to the end part far away from one end of the mounting platform.
6. The consumable electrode gas shield welding narrow gap welding torch of claim 5, wherein: the two outer side surfaces that the second nozzle portion arranged along width direction set up to the planar structure that is parallel to each other, the two outer side surfaces that the second nozzle portion arranged along length direction set up to the arc surface structure, the outer side surface of first nozzle portion is provided with cylindrical surface structure and inclined plane structure, the arc surface structure links to each other with cylindrical surface structure, and flushes mutually, planar structure passes through inclined plane structure with cylindrical surface structure and links to each other, the guard surface sets up to the first cambered surface structure with cylindrical surface structure and arc surface structure assorted.
7. The consumable electrode gas shield narrow gap welding torch of claim 6, wherein: the second column part comprises a second column body and a second column reinforcing block, the distance between two outer side surfaces of the second column body which are arranged along the width direction of the second nozzle part is the same or basically the same as the distance between two outer side surfaces of the second nozzle part which are arranged along the width direction, two adjacent sides on the second column reinforcing block are respectively connected with the side surface which is far away from the nozzle base on the mounting platform and the side surface which is arranged along the width direction of the second nozzle part on the second column body, and the distance between the second column reinforcing block and the second nozzle part is larger than the distance between one end part which is close to the mounting platform on the inclined plane structure and the second nozzle part; the lateral surface of second post portion flushes with mounting platform periphery side.
8. The consumable electrode gas shield narrow gap welding torch of claim 7, wherein: the conductive structure further comprises a conductive rod, an adapter and a conductive connecting part for butt joint of an external wire feeding mechanism, one end of the conductive rod is connected with the conductive nozzle, the other end of the conductive rod is connected with the conductive connecting part, a gas channel for outputting protective gas is radially arranged on the conductive rod in a penetrating mode along the conductive rod, the adapter stretches into the first nozzle part to be detachably connected with the nozzle structure, the conductive connecting part is detachably connected with the adapter, and the conductive rod is arranged in the first nozzle part after installation.
9. The consumable electrode gas shield welding narrow gap welding gun of any one of claims 1-8, wherein: the nozzle structure is made of ceramic materials, and the air support structure is made of metal materials.
10. The consumable electrode gas shield narrow gap welding torch of claim 9, wherein: the outer diameter of the second nozzle part in the width direction is X1, wherein X1 is more than or equal to 9mm and less than or equal to 14mm; the inner diameter of the second nozzle part in the width direction is X2, wherein X2 is more than or equal to 5mm and less than or equal to 8mm; the outer diameter of the second nozzle part in the length direction is Y1, wherein Y1 which is more than or equal to 16mm and less than or equal to 25mm; the length of the conductive structure extending out of the second nozzle part is Z, wherein Z is more than or equal to 3mm and less than or equal to 12mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310852487.5A CN116833524A (en) | 2023-07-12 | 2023-07-12 | Welding gun for gas metal arc welding narrow gap welding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310852487.5A CN116833524A (en) | 2023-07-12 | 2023-07-12 | Welding gun for gas metal arc welding narrow gap welding |
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| CN116833524A true CN116833524A (en) | 2023-10-03 |
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| CN202310852487.5A Pending CN116833524A (en) | 2023-07-12 | 2023-07-12 | Welding gun for gas metal arc welding narrow gap welding |
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| Country | Link |
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| CN (1) | CN116833524A (en) |
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- 2023-07-12 CN CN202310852487.5A patent/CN116833524A/en active Pending
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