CN112605504A - Preheating welding wire submerged arc welding gun - Google Patents
Preheating welding wire submerged arc welding gun Download PDFInfo
- Publication number
- CN112605504A CN112605504A CN202011412453.7A CN202011412453A CN112605504A CN 112605504 A CN112605504 A CN 112605504A CN 202011412453 A CN202011412453 A CN 202011412453A CN 112605504 A CN112605504 A CN 112605504A
- Authority
- CN
- China
- Prior art keywords
- hole
- section
- conductive
- welding wire
- pull rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 190
- 239000000919 ceramic Substances 0.000 claims description 45
- 230000000670 limiting effect Effects 0.000 claims description 15
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims 2
- 238000002844 melting Methods 0.000 abstract description 5
- 230000008018 melting Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 10
- 238000005299 abrasion Methods 0.000 description 3
- 238000005381 potential energy Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
-
- 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
Abstract
The invention belongs to the technical field of welding, aims to solve the problems of poor preheating performance of a welding wire, poor stability of welding wire alignment welding seams and poor accuracy of the existing submerged arc welding gun, and particularly relates to a preheated welding wire submerged arc welding gun which comprises a conductive component, a conductive joint and a centering component for centering the welding wire; the conductive assembly comprises a first device and a conductive nozzle, and a first through hole is formed in the first device; the center of the contact tube is provided with a second through hole along the axial direction of the contact tube; one end of the conductive joint is connected with the first device, and the other end of the conductive joint is connected with the righting component; a stepped through hole is formed in the conductive connector and comprises a first section of through hole and a second section of through hole, wherein the first section of through hole is used for arranging a conductive nozzle, and the inner diameter of the first section of through hole is larger than that of the second section of through hole; the length of the conductive joint is greater than that of the conductive nozzle; the invention can improve the melting speed of the welding wire of unit current by 10 to 80 percent, reduce the energy of welding line by 5 to 20 percent and improve the mechanical properties of a welding seam and a heat affected zone.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to a preheating welding wire submerged arc welding gun.
Background
In the existing conventional submerged arc welding process, a submerged arc welding gun generally adopts a tubular contact nozzle, the dry extension of a welding wire is generally 25-40mm, and the tubular contact nozzle is simple in structure, compact in size and convenient to arrange and apply in multi-wire submerged arc welding. However, in the process adopting the dry elongation of the welding wire of 25-40mm, because the dry elongation of the welding wire is very short, resistance heat generated by welding current in the welding wire of 25-40mm in length is very small, and almost no preheating effect is exerted on the welding wire. Meanwhile, if a conventional submerged arc welding gun is directly used, the position of a contact nozzle of the welding gun is directly raised to increase the dry extension of the welding wire, the stability and accuracy of the welding wire to the alignment welding seam are obviously poor, and welding deviation is easily caused.
Disclosure of Invention
In order to solve the problems in the prior art, namely to solve the problems of poor preheating performance of the existing submerged arc welding gun on the welding wire and poor stability and accuracy of the welding wire on the alignment welding seam, the invention provides a preheated welding wire submerged arc welding gun, which comprises a conductive component, a conductive joint and a centering component; the conductive assembly comprises a first device and a conductive nozzle, and a first through hole is formed in the center of the first device along the axial direction of the first device; a second through hole is formed in the center of the contact tube along the axial direction of the contact tube; the first through hole and the second through hole can be used for penetrating welding wires;
one end of the conductive joint is connected with the first device, and the other end of the conductive joint is connected with the righting component; a stepped through hole is formed in the conductive joint and comprises a first section of through hole and a second section of through hole, and the inner diameter of the first section of through hole is larger than that of the second section of through hole; the contact tube is arranged in the first section of through hole; the length of the conductive joint is greater than that of the contact tip;
and a third through hole is formed in the center of the centering component along the axial direction of the centering component and is used for centering the welding wire.
In some preferred embodiments, the first device comprises a first conductor bar, a joint and a welding wire tensioning device, wherein one end of the joint is in threaded connection with the first conductor bar, and the other end of the joint is in threaded connection with the conductor joint; the central line of the joint is consistent with the central line of the first conducting rod;
the joint comprises a first connecting section and a second connecting section, wherein one end of the first connecting section, which is far away from the second connecting section, is provided with an internal thread matched with an external thread arranged on the outer side of the first conducting rod; a first joint through hole is formed in the middle of the first connecting section, a pull rod accommodating through hole communicated with the first joint through hole is formed in the side part of the first connecting section, and the center line of the pull rod accommodating through hole is consistent with that of the welding wire tensioning device; one end of the second connecting section, which is far away from the first connecting section, is provided with an internal thread matched with an external thread arranged on the outer side of the conductive connector, the middle of the second connecting section is provided with a second connector through hole, and the second connector through hole is overlapped with the central line of the first connector through hole;
the welding wire tensioning device comprises a rotating handle, a pull rod and an elastic assembly, wherein the first end of the pull rod is fixedly connected with the rotating handle, the second end of the pull rod penetrates through the pull rod accommodating through hole to be arranged inside the first connecting section, and the axis of the pull rod is perpendicular to the axis of the first connecting section; the second end is provided with a pull rod through hole for penetrating a welding wire, and the axis of the pull rod through hole is parallel to the axis of the first connecting section; the elastic component is sleeved outside the pull rod; the elastic assembly is compressed by rotating the rotating handle and drives the pull rod and the welding wire in the pull rod through hole to move outwards, so that the reliable contact and the electric conduction of the welding wire and the contact tip are ensured.
In some preferred embodiments, the resilient assembly comprises a spring and a spring retainer ring, the spring retainer ring being disposed at an end of the spring remote from the swing handle;
the outer diameter of the spring retainer ring is larger than the inner diameter of the pull rod through hole.
In some preferred embodiments, the conductive assembly further includes a guide sleeve, the guide sleeve is disposed at an end of the conductive nozzle away from the righting assembly, and the guide sleeve is disposed in the first section of through hole;
the inside of uide bushing is equipped with first inverted circular truncated cone shape through-hole, the first direction through-hole section of first inverted circular truncated cone shape through-hole is kept away from the contact tube setting, and second direction through-hole section is close to the contact tube setting, just the internal diameter of first direction through-hole section is greater than the internal diameter of second direction through-hole section.
In some preferred embodiments, the stepped through hole further comprises a third section of through hole, and the inner diameter of the third section of through hole is larger than that of the second section of through hole; the third section of through hole is provided with an internal thread, and the outer side of the centering component is provided with an external thread matched with the internal thread.
In some preferred embodiments, the first device is a second conductive rod, and the first through hole is a central hole of the second conductive rod; the second through hole is eccentrically arranged with the central hole and the third through hole; the second through hole is overlapped with the axis of the stepped through hole.
In some preferred embodiments, the centralizing assembly comprises a ceramic tube and a ceramic tube sheath, the ceramic tube sheath being sleeved outside the ceramic tube;
a second inverted circular truncated cone-shaped through hole is formed in the ceramic tube, a first inner diameter through hole section of the second inverted circular truncated cone-shaped through hole is arranged far away from the conductive nozzle, a second inner diameter through hole section is arranged close to the conductive nozzle, and the inner diameter of the second inner diameter through hole section is larger than that of the first inner diameter through hole section;
a fifth through hole is formed in the ceramic tube sheath and comprises a connecting through hole section and a limiting through hole section, the inner diameter of the limiting through hole section is smaller than that of the connecting through hole section, and the inner diameter of the limiting through hole section is smaller than the outer diameter of the ceramic tube; the ceramic tube is arranged on the connecting through hole section;
the center line of the fifth through hole is consistent with the center line of the second inverted circular truncated cone-shaped through hole.
In some preferred embodiments, the taper of the second truncated-cone-shaped through hole is θ, θ e [30 °, 60 ° ].
In some preferred embodiments the height of the contact tip from the end of the contact tip remote from the first means to the area to be welded is h, h e [70mm, 130mm ].
In some preferred embodiments, the preheating temperature of the preheated wire submerged arc welding gun is T, T e [400 ℃, 900 ℃).
Compared with the existing submerged arc welding technology of normal dry extension of the welding wire of 25mm-40mm of the conventional submerged arc welding gun, the preheating welding wire submerged arc welding gun provided by the invention adopts a 70mm-130mm welding wire large dry extension submerged arc welding process, can improve the melting speed of the welding wire, namely the welding speed by 10% -80% under the same welding current condition, reduces the energy of the welding wire by 5% -20%, and effectively improves the metallographic structure and the mechanical property of a welding line and a heat affected zone.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic cross-sectional view of one embodiment of a pre-heated wire submerged arc welding gun of the present invention;
FIG. 2 is a schematic cross-sectional view of another embodiment of the preheated wire submerged arc welding gun of the present invention.
Description of reference numerals:
100. a second conductive rod; 110. a first conductive rod; 121. a rotating handle 122, a pull rod 123, a spring 124 and a spring retainer ring; 130. a joint; 140. a guide sleeve; 200. a contact tip; 300. a conductive joint; 400. a ceramic tube; 500. and (4) a ceramic tube sheath.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, and it will be understood by those skilled in the art that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of the present invention.
The invention provides a preheating welding wire submerged arc welding gun which comprises a conductive component, a conductive joint and a centering component, wherein the conductive component is arranged on the conductive joint; the conductive assembly comprises a first device and a conductive nozzle, and a first through hole is formed in the center of the first device along the axial direction of the first device; the center of the contact tube is provided with a second through hole along the axial direction of the contact tube; the first through hole and the second through hole can be used for penetrating welding wires, namely the inner diameters of the first through hole and the second through hole are larger than the outer diameter of the welding wires, so that the penetrating of the welding wires is not influenced; one end of the conductive joint is connected with the first device, and the other end of the conductive joint is connected with the righting component; a stepped through hole is formed in the conductive connector and comprises a first section of through hole and a second section of through hole, the inner diameter of the first section of through hole is larger than that of the second section of through hole, the conductive nozzle is arranged in the first section of through hole, and the second end of through hole with smaller diameter has a limiting effect on the conductive nozzle; the length of the conductive joint is larger than that of the conductive nozzle, so that the position of the conductive nozzle is increased to increase the dry extension of the welding wire through the arrangement of the conductive joint and the centering component, namely, the position of the conductive nozzle is increased to increase the length of the welding wire extending out of the end part of the conductive nozzle on the basis of the conventional submerged arc welding process of the submerged arc welding gun, and further, the welding speed is increased, the energy of a welding line is reduced, and the metallographic structure and the mechanical property of a welding seam and a heat affected zone are improved. The center of the centering component is provided with a third through hole along the axial direction of the centering component, and the third through hole is used for centering a welding wire, so that the reliable alignment problem of a large-dry-extension welding wire to a welding seam and the abrasion problem of a preheating high-temperature welding wire to a centering device can be effectively solved through the setting of the centering component.
Furthermore, the righting component comprises a ceramic tube and a ceramic tube sheath, and the ceramic tube sheath is sleeved on the outer side of the ceramic tube; the inside of ceramic tube is provided with second radius platform shape through-hole, and the first internal diameter through-hole section of second radius platform shape through-hole is kept away from the contact tip setting, and second internal diameter through-hole section is close to the contact tip setting, and the internal diameter of second internal diameter through-hole section is greater than the internal diameter of first internal diameter through-hole section, passes through radius platform hole section transition promptly inside ceramic tube, can guarantee smooth and easy the wearing of welding wire in welder and send, can realize the natural emergence elastic bending of 2-6 of welding wire simultaneously, can make the in close contact with of welding wire and contact tip, guarantee the electrically conductive stability of welding wire in the welding process.
Furthermore, a fifth through hole is formed in the ceramic tube sheath, the fifth through hole comprises a connecting through hole section and a limiting through hole section, the inner diameter of the limiting through hole section is smaller than that of the connecting through hole section, and the inner diameter of the limiting through hole section is smaller than the outer diameter of the ceramic tube, so that the ceramic tube is limited while being protected; the ceramic tube is arranged at the connecting through hole section; the center line of the fifth through hole is consistent with that of the second inverted-truncated-cone-shaped through hole, namely, the fifth through hole and the second inverted-truncated-cone-shaped through hole are arranged in a superposed mode. In the invention, the insulating, high-temperature-resistant and wear-resistant ceramic tube is used as the centralizer of the large-dry-extension welding wire, so that the problems of reliable alignment of the large-dry-extension welding wire to a welding seam and abrasion of the preheated high-temperature welding wire to the centralizer can be effectively solved.
The preheating welding wire submerged arc welding gun provided by the invention can greatly improve the resistance heat of the welding wire by increasing the conductive length of the welding wire by means of welding current, the welding wire is preheated to the temperature of 400-900 ℃ and then is sent into an arc area, the melting speed of the welding wire at unit current can be increased by 10-80% on the premise of not increasing the input of welding heat, and the purposes of improving the welding speed, reducing the energy of the welding wire and improving the metallographic structure and the mechanical property of a welding seam and a heat affected area can be achieved.
The problem of poor conductive stability of the tubular conductive nozzle arranged with the same axis can be effectively solved through the arrangement of the first device.
Furthermore, the first device comprises a first conducting rod, a joint and a welding wire tensioning device, wherein one end of the joint is in threaded connection with the first conducting rod, and the other end of the joint is in threaded connection with the conducting joint; the central line of the joint is consistent with the central line of the first conducting rod; the joint comprises a first connecting section and a second connecting section, wherein an internal thread matched with an external thread arranged on the outer side of the first conducting rod is arranged at one end of the first connecting section, which is far away from the second connecting section; a first joint through hole is formed in the middle of the first connecting section, a pull rod accommodating through hole communicated with the first joint through hole is formed in the side part of the first connecting section, and the center line of the pull rod accommodating through hole is consistent with the center line of the welding wire tensioning device and provides a channel for the horizontal movement of the welding wire tensioning device; one end of the second connecting section, which is far away from the first connecting section, is provided with an internal thread matched with an external thread arranged on the outer side of the conductive connector, a second connector through hole is arranged in the middle of the second connecting section, and the second connector through hole is coincided with the central line of the first connector through hole.
In a first embodiment, the submerged arc welding gun is a spring pull rod type welding gun; the welding wire tensioning device comprises a rotating handle, a pull rod and an elastic assembly, wherein the first end of the pull rod is fixedly connected with the rotating handle, the second end of the pull rod penetrates through the pull rod accommodating through hole to be arranged inside the first connecting section, and the axis of the pull rod is perpendicular to the axis of the first connecting section; the second end is provided with a pull rod through hole for penetrating a welding wire, the axis of the pull rod through hole is parallel to the axis of the first connecting section, and the inner diameter of the pull rod through hole is larger than the outer diameter of the welding wire; the elastic component is sleeved outside the pull rod; under the action of external force, the handle can be rotated to drive the pull rod and the welding wire in the pull rod through hole to move outwards so as to conduct close contact between the welding wire and the contact tip, when the external force is released, the pull rod restores to an initial state under the action of elastic potential energy of the compressed elastic component, and the initial state is that the central line of the pull rod through hole is superposed with the central line of the first connecting section.
In a second embodiment, the first device is a second conductive rod, and the first through hole is a central hole of the second conductive rod; the second through hole is eccentrically arranged with the central hole and the third through hole; the axes of the second through hole and the stepped through hole are coincided, namely, the center hole of the conductive nozzle, the center hole of the first conductive rod and the center hole of the centering component are eccentrically arranged, and the problem of poor conductive stability of the tubular conductive nozzle which is arranged with the same axis can be effectively solved by adopting the eccentrically arranged conductive nozzle.
The invention is further described with reference to the following detailed description of embodiments with reference to the accompanying drawings.
Referring to FIG. 1, a schematic cross-sectional view of one embodiment of a preheated wire submerged arc welding gun of the present invention is illustrated; in this embodiment, the submerged arc welding gun is a spring-pull rod type welding gun, and includes a first conductive rod 110, a joint 130, a welding wire tensioning device, a contact tip 200, a conductive joint 300, a ceramic tube 400, and a ceramic tube sheath 500, where one end of the joint 130 is in threaded connection with the first conductive rod 110, and the other end is in threaded connection with the conductive joint 300; the center line of the joint 130 is arranged in correspondence with the center line of the first conductive rod 110; the center of the contact tip 200 is provided with a second through hole along the axial direction thereof for penetrating a welding wire; one end of the conductive joint 300 is connected with the joint 130, and the other end of the conductive joint is connected with the ceramic tube sheath 500; a stepped through hole is formed in the conductive connector and comprises a first section of through hole and a second section of through hole, and the inner diameter of the first section of through hole is larger than that of the second section of through hole; the contact tube is arranged in the first section of through hole, and is limited while being fixed through the second section of through hole with small inner diameter; the length of the conductive contact 300 is greater than the length of the contact tip 200; the ceramic tube sheath 500 is sleeved on the outer side of the ceramic tube 400.
Furthermore, the stepped through hole also comprises a third section of through hole, and the inner diameter of the third section of through hole is larger than that of the second section of through hole; the third section of through hole is provided with an internal thread, and the outer side of the ceramic tube sheath 500 is provided with an external thread matched with the internal thread.
Further, the joint 130 includes a first connection section and a second connection section, wherein one end of the first connection section, which is far away from the second connection section, is provided with an internal thread matched with an external thread arranged on the outer side of the first conducting rod, and the first connection section is a section provided with a spring pull rod; a first joint through hole is formed in the middle of the first connecting section, a pull rod accommodating through hole communicated with the first joint through hole is formed in the side part of the first connecting section, and the center line of the pull rod accommodating through hole is consistent with that of the welding wire tensioning device; one end of the second connecting section, which is far away from the first connecting section, is provided with an internal thread matched with an external thread arranged on the outer side of the conductive connector 300, a second connector through hole is arranged in the middle of the second connecting section, and the second connector through hole is coincided with the central line of the first connector through hole.
Further, the welding wire tensioning device comprises a rotating handle 121, a pull rod 122 and an elastic assembly, wherein a first end of the pull rod 122 is fixedly connected with the rotating handle 121, a second end of the pull rod 122 penetrates through the pull rod accommodating through hole to be arranged inside the first connecting section, and the axis of the pull rod 122 is perpendicular to the axis of the first connecting section; the second end is provided with a pull rod through hole for penetrating a welding wire, and the axis of the pull rod through hole is parallel to the axis of the first connecting section; the elastic component is sleeved outside the pull rod 122; the elastic assembly is compressed by rotating the rotating handle, and the elastic potential energy accumulated after the elastic assembly is compressed acts on the rotating handle outwards, so that the pull rod and the welding wire in the pull rod through hole are driven to move outwards, and the welding wire is ensured to be in reliable contact with the contact tip to be conductive.
Preferably, in the process of welding wire penetration, the center of the pull rod through hole coincides with the center of the first connecting section, so that the welding wire can be smoothly penetrated and arranged.
Preferably, the resilient assembly comprises a spring 123 and a spring collar 124, the spring collar being disposed at an end of the spring remote from the twist grip; the external diameter of the spring retainer ring is larger than the internal diameter of the pull rod accommodating through hole so as to limit the spring.
Preferably, the first contact rod, the joint, the welding wire tensioning device and the contact tip form a conductive assembly, and the position of the contact tip can be increased to increase the dry extension of the welding wire, namely, the position of the contact tip is increased to increase the length of the welding wire extending out of the end part of the contact tip on the basis of the conventional submerged arc welding process of the submerged arc welding gun, so that the welding speed is increased, the energy of a welding line is reduced, and the metallographic structure and the mechanical property of a welding seam and a heat affected zone are improved.
Furthermore, the ceramic tube and the ceramic tube sheath form a centering assembly, and the insulating, high-temperature-resistant and wear-resistant ceramic tube is used as a centering device for the long welding wire, so that the problems of reliable alignment of the long welding wire to a welding seam and abrasion of the preheated high-temperature welding wire to the centering device can be effectively solved.
Preferably, a second inverted circular truncated cone-shaped through hole is formed in the ceramic tube 400, a first inner diameter through hole section of the second inverted circular truncated cone-shaped through hole is arranged far away from the contact tip 200, a second inner diameter through hole section is arranged close to the contact tip 200, the inner diameter of the second inner diameter through hole section is larger than that of the first inner diameter through hole section, and the inner diameter is smaller along the welding wire penetrating direction, so that the welding wire can be conveniently penetrated; a fifth through hole is formed in the ceramic tube sheath 500 and comprises a connecting through hole section and a limiting through hole section, the inner diameter of the limiting through hole section is smaller than that of the connecting through hole section, the inner diameter of the limiting through hole section is smaller than the outer diameter of the ceramic tube, and the connecting through hole section is used for being connected with the ceramic tube 400; the ceramic tube 400 is in threaded connection with the connecting through hole section; the center line of the fifth through hole is consistent with the center line of the second inverted round table-shaped through hole.
Preferably, the taper of the second truncated-cone-shaped through hole is theta, theta epsilon [30 degrees and 60 degrees ].
The central hole of the ceramic tube is designed to be different in the upper section and the lower section, the diameter of the inner hole of the upper section is large, the diameter of the inner hole of the lower section is small, and the upper section and the lower section of inner holes are transited through a section of conical hole, so that the welding wire can be smoothly fed in a welding gun; meanwhile, the welding wire is naturally elastically bent by 2-6 degrees, so that the welding wire can be tightly contacted with the middle contact nozzle, and the conductive stability of the welding wire in the welding process is ensured.
Further, the conductive assembly further comprises a guide sleeve 140, the guide sleeve is disposed at one end of the contact tip 200 away from the ceramic tube 400, and the guide sleeve 140 is disposed in the first section of through hole; the inside of uide bushing is equipped with first inverted circular truncated cone shape through-hole, and the contact tip setting is kept away from to the first direction through-hole section of first inverted circular truncated cone shape through-hole, and the second direction through-hole section is close to the contact tip setting, and the internal diameter of first direction through-hole section is greater than the internal diameter of second direction through-hole section, the leading-in of the welding wire of being convenient for.
Preferably, the height of the contact tip from the end of the first device to the area to be welded is h, h e [70mm, 130mm ]; by the present invention, the dry elongation of the wire is increased from the length range of about 25mm-40mm of conventional submerged arc welding to the range of 70mm-130 mm; after the welding wire with the length of 70mm-130mm is adopted for large-dry extension, the welding wire can be preheated to 400-900 ℃, and the melting speed of the welding wire can be 10-80%.
Preferably, the preheating temperature of the welding wire submerged arc welding gun is T, and T belongs to [400 ℃, 900 ℃; the resistance heat of the welding wire is greatly improved by increasing the conductive length of the welding wire by means of welding current, the welding wire is preheated to the temperature of 400-900 ℃ and then is sent into an arc area, the melting speed of the welding wire at unit current can be increased by 10-80% on the premise of not increasing the input of welding heat, and the aims of improving the welding speed, reducing the energy of the welding wire, and improving the metallographic structure and the mechanical property of a welding seam and a heat affected area can be fulfilled.
Further, referring to fig. 2, there is shown a schematic cross-sectional view of another embodiment of the pre-heated welding wire submerged arc welding gun of the present invention, in this embodiment, the first device is a second conductive rod 100, and the first through hole is a central hole of the second conductive rod; the second through hole is eccentrically arranged with the central hole and the third through hole; the second through hole is overlapped with the axis of the stepped through hole; the center hole of the contact tip, the center hole of the first contact rod and the center hole of the centering component are eccentrically arranged, the problem that the tubular contact tip arranged coaxially with the axis is poor in conductive stability can be effectively solved by the aid of the eccentrically arranged contact tip, and the conductive stability of the welding wire is guaranteed.
Referring to table 1, table 1 shows experimental statistics of welding current, dry elongation, and wire feed speed for a 4mm diameter wire using a preheated wire submerged arc welding gun.
TABLE 1
Data table of wire feeding speed corresponding to different welding currents and dry elongations
While the invention has been described with reference to a preferred embodiment, various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and particularly, features shown in the various embodiments may be combined in any suitable manner without departing from the scope of the invention. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A pre-heating welding wire submerged arc welding gun is characterized in that the welding gun comprises a conductive component, a conductive joint and a centering component; the conductive assembly comprises a first device and a conductive nozzle, and a first through hole is formed in the center of the first device along the axial direction of the first device; a second through hole is formed in the center of the contact tube along the axial direction of the contact tube; the first through hole and the second through hole can be used for penetrating welding wires;
one end of the conductive joint is connected with the first device, and the other end of the conductive joint is connected with the righting component; a stepped through hole is formed in the conductive joint and comprises a first section of through hole and a second section of through hole, and the inner diameter of the first section of through hole is larger than that of the second section of through hole; the contact tube is arranged in the first section of through hole; the length of the conductive joint is greater than that of the contact tip;
and a third through hole is formed in the center of the centering component along the axial direction of the centering component and is used for centering the welding wire.
2. The preheated welding wire submerged arc welding gun according to claim 1, wherein the first means comprises a first conductor bar, a joint, and a welding wire tensioning device, one end of the joint is in threaded connection with the first conductor bar, and the other end is in threaded connection with the conductor joint; the central line of the joint is consistent with the central line of the first conducting rod;
the joint comprises a first connecting section and a second connecting section, wherein one end of the first connecting section, which is far away from the second connecting section, is provided with an internal thread matched with an external thread arranged on the outer side of the first conducting rod; a first joint through hole is formed in the middle of the first connecting section, a pull rod accommodating through hole communicated with the first joint through hole is formed in the side part of the first connecting section, and the center line of the pull rod accommodating through hole is consistent with that of the welding wire tensioning device; one end of the second connecting section, which is far away from the first connecting section, is provided with an internal thread matched with an external thread arranged on the outer side of the conductive connector, the middle of the second connecting section is provided with a second connector through hole, and the second connector through hole is overlapped with the central line of the first connector through hole;
the welding wire tensioning device comprises a rotating handle, a pull rod and an elastic assembly, wherein the first end of the pull rod is fixedly connected with the rotating handle, the second end of the pull rod penetrates through the pull rod accommodating through hole to be arranged inside the first connecting section, and the axis of the pull rod is perpendicular to the axis of the first connecting section; the second end is provided with a pull rod through hole for penetrating a welding wire, and the axis of the pull rod through hole is parallel to the axis of the first connecting section; the elastic component is sleeved outside the pull rod; the elastic assembly is compressed by rotating the rotating handle and drives the pull rod and the welding wire in the pull rod through hole to move outwards, so that the reliable contact and the electric conduction of the welding wire and the contact tip are ensured.
3. The preheated wire submerged arc welding gun according to claim 2, wherein the resilient assembly comprises a spring and a spring collar, the spring collar being disposed at an end of the spring remote from the rotating handle;
the outer diameter of the spring retainer ring is larger than the inner diameter of the pull rod through hole.
4. The preheated welding wire submerged arc welding gun according to claim 1, wherein the conductive assembly further comprises a guide sleeve, the guide sleeve is arranged at one end of the contact tip, which is far away from the righting assembly, and the guide sleeve is arranged in the first section of through hole;
the inside of uide bushing is equipped with first inverted circular truncated cone shape through-hole, the first direction through-hole section of first inverted circular truncated cone shape through-hole is kept away from the contact tube setting, and second direction through-hole section is close to the contact tube setting, just the internal diameter of first direction through-hole section is greater than the internal diameter of second direction through-hole section.
5. The pre-heated wire submerged arc welding gun according to claim 1, wherein the stepped through hole further comprises a third section of through hole having an inner diameter larger than an inner diameter of the second section of through hole; the third section of through hole is provided with an internal thread, and the outer side of the centering component is provided with an external thread matched with the internal thread.
6. The preheated welding wire submerged arc welding gun according to claim 1, wherein the first means is a second conductive rod, and the first through hole is a center hole of the second conductive rod; the second through hole is eccentrically arranged with the central hole and the third through hole; the second through hole is overlapped with the axis of the stepped through hole.
7. The pre-heated wire submerged arc welding gun according to claim 1, wherein the centering assembly comprises a ceramic tube and a ceramic tube sheath, the ceramic tube sheath being disposed outside the ceramic tube;
a second inverted circular truncated cone-shaped through hole is formed in the ceramic tube, a first inner diameter through hole section of the second inverted circular truncated cone-shaped through hole is arranged far away from the conductive nozzle, a second inner diameter through hole section is arranged close to the conductive nozzle, and the inner diameter of the second inner diameter through hole section is larger than that of the first inner diameter through hole section;
a fifth through hole is formed in the ceramic tube sheath and comprises a connecting through hole section and a limiting through hole section, the inner diameter of the limiting through hole section is smaller than that of the connecting through hole section, and the inner diameter of the limiting through hole section is smaller than the outer diameter of the ceramic tube; the ceramic tube is arranged on the connecting through hole section;
the center line of the fifth through hole is consistent with the center line of the second inverted circular truncated cone-shaped through hole.
8. The pre-heated welding wire submerged arc welding gun according to claim 7, wherein the taper of the second truncated cone shaped through hole is θ, θ e [30 °, 60 °.
9. The preheated welding wire submerged arc welding gun according to any one of claims 1 to 8, wherein the height of the tip away from the first device to the area to be welded is h, h e [70mm, 130mm ].
10. The pre-heated welding wire submerged arc welding gun according to any one of claims 1 to 8, characterized in that the pre-heating temperature of the pre-heated welding wire submerged arc welding gun is T, T e [400 ℃, 900 ℃).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011412453.7A CN112605504A (en) | 2020-12-04 | 2020-12-04 | Preheating welding wire submerged arc welding gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011412453.7A CN112605504A (en) | 2020-12-04 | 2020-12-04 | Preheating welding wire submerged arc welding gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112605504A true CN112605504A (en) | 2021-04-06 |
Family
ID=75229086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011412453.7A Pending CN112605504A (en) | 2020-12-04 | 2020-12-04 | Preheating welding wire submerged arc welding gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112605504A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114367725A (en) * | 2022-02-16 | 2022-04-19 | 意大利科林派斯公司 | Submerged arc welding hot wire welding gun |
| DE102022112983A1 (en) | 2022-05-23 | 2023-11-23 | AWS Schäfer Technologie GmbH | Process for submerged arc welding |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87206665U (en) * | 1987-04-24 | 1988-09-28 | 锦西化工机械厂 | Preheating solder wire submerged-arc welding device with increasing solder wire power on length |
| CN2097709U (en) * | 1990-08-26 | 1992-03-04 | 罗竞明 | Side slot layering type welding tip |
| CA2239198A1 (en) * | 1998-05-29 | 1999-11-29 | Donald James Savage | Ceramic insert for welding torch |
| CN101331000A (en) * | 2005-12-12 | 2008-12-24 | 弗罗纽斯国际有限公司 | Welding torch and end piece and also contact tube for a welding torch |
| CN201442147U (en) * | 2009-03-27 | 2010-04-28 | 毛宇 | Electric conduction nozzle having long dry-extension |
| CN104668748A (en) * | 2013-11-29 | 2015-06-03 | 何朋飞 | Submerged-arc welding eccentric conductive nozzle |
| CN208961189U (en) * | 2018-08-20 | 2019-06-11 | 中国石油天然气集团有限公司 | Welder and welding system |
-
2020
- 2020-12-04 CN CN202011412453.7A patent/CN112605504A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87206665U (en) * | 1987-04-24 | 1988-09-28 | 锦西化工机械厂 | Preheating solder wire submerged-arc welding device with increasing solder wire power on length |
| CN2097709U (en) * | 1990-08-26 | 1992-03-04 | 罗竞明 | Side slot layering type welding tip |
| CA2239198A1 (en) * | 1998-05-29 | 1999-11-29 | Donald James Savage | Ceramic insert for welding torch |
| CN101331000A (en) * | 2005-12-12 | 2008-12-24 | 弗罗纽斯国际有限公司 | Welding torch and end piece and also contact tube for a welding torch |
| CN201442147U (en) * | 2009-03-27 | 2010-04-28 | 毛宇 | Electric conduction nozzle having long dry-extension |
| CN104668748A (en) * | 2013-11-29 | 2015-06-03 | 何朋飞 | Submerged-arc welding eccentric conductive nozzle |
| CN208961189U (en) * | 2018-08-20 | 2019-06-11 | 中国石油天然气集团有限公司 | Welder and welding system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114367725A (en) * | 2022-02-16 | 2022-04-19 | 意大利科林派斯公司 | Submerged arc welding hot wire welding gun |
| DE102022112983A1 (en) | 2022-05-23 | 2023-11-23 | AWS Schäfer Technologie GmbH | Process for submerged arc welding |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112605504A (en) | Preheating welding wire submerged arc welding gun | |
| CN101331000B (en) | Welding torch and end piece and also contact tube for a welding torch | |
| US9302341B2 (en) | Welding contact tip with conductive brush | |
| CN100531993C (en) | Rotating arc narrow gap welding torque | |
| CN102223983A (en) | Device and method for contacting a welding rod and contact shell | |
| US6066832A (en) | Welding arc voltage sense lead | |
| CN201405155Y (en) | Welding device of weld seam in spiral welded steel pipe | |
| CN209850074U (en) | Single-arc double-wire surfacing wire feeding mechanism | |
| CN213497097U (en) | TIG welding gun for small space operation | |
| CN213614720U (en) | Contact tube structure and welding gun with same | |
| CN105195871B (en) | Narrow-clearance submerged arc welding rifle and welding equipment | |
| CN208961189U (en) | Welder and welding system | |
| CN104538753B (en) | A kind of hyperconductive cable piecing devices | |
| CN106964871A (en) | For the mechanically height tracing device and method of electric arc Cutting dolly under water | |
| CN214849121U (en) | Terminal convenient to installation wiring | |
| CN102922106A (en) | Automatic-clamp and energy-saving contact tube with long service life | |
| CN217096096U (en) | Wire guide pipe for welding gun | |
| CN210167537U (en) | Electric connection structure of ultrasonic main shaft | |
| CN113305405A (en) | Double-wire single-arc welding contact tip and application thereof | |
| CN210435380U (en) | Ultrasonic main shaft and ultrasonic machine tool comprising same | |
| CN209592432U (en) | Big tolerance radio frequency connector inner conductor | |
| CN214161712U (en) | Welding gun contact tube | |
| KR101791145B1 (en) | A total welding torch | |
| CN100475406C (en) | Welding tongs head of manual electric arc welding | |
| CN212823320U (en) | Automatic welding elliptical hole welding nozzle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210406 |
|
| RJ01 | Rejection of invention patent application after publication |