CN112570856A - Cold and hot welding wire matching welding device and system for oil gas conveying steel pipe - Google Patents
Cold and hot welding wire matching welding device and system for oil gas conveying steel pipe Download PDFInfo
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- CN112570856A CN112570856A CN202011446683.5A CN202011446683A CN112570856A CN 112570856 A CN112570856 A CN 112570856A CN 202011446683 A CN202011446683 A CN 202011446683A CN 112570856 A CN112570856 A CN 112570856A
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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
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
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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
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Abstract
The invention belongs to the technical field of welding, and particularly relates to a cold and hot welding wire matching welding device for an oil gas conveying steel pipe, aiming at solving the problems of reducing the cladding amount of base metal during welding of a large-caliber large-wall-thickness oil gas conveying steel pipe, improving the cooling speed of a welding seam, improving the structure of the welding seam and improving the performance in the prior art. The welding device comprises a welding wire conveying mechanism for conveying a first welding wire and a second welding wire at the same time, wherein the first welding wire/the second welding wire can be conveyed by the welding wire conveying mechanism to be respectively connected with first welding equipment/second welding equipment; the first welding equipment and the second welding equipment respectively comprise a welding wire tracking mechanism and a welding gun, the welding wire conveying mechanism is used for driving the first welding wire/the second welding wire to pass through the welding wire tracking mechanism and move towards the welding gun, and the welding wire tracking mechanism is used for adjusting the relative pose between the first welding wire and the second welding wire. The method and the device can improve the cooling speed of the welding line, improve the structure and improve the performance.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to a cold and hot welding wire matching welding device and system for an oil gas conveying steel pipe.
Background
Along with the construction of long-distance large-conveying pipeline, the caliber and the wall thickness of the steel pipe for oil and gas conveying are increasingly large. Along with the increase of the wall thickness, the cladding metal amount of the base material is increased, and the energy input of the weld line is increased. The heat affected zone of the welding seam is overheated, the structure is thick and thick, the toughness is reduced, and the internal quality of the steel pipe is reduced. How to reduce the cladding amount of base metal during welding of the large-caliber large-wall-thickness oil and gas conveying steel pipe, improve the cooling speed of a welding seam, improve the structure of the welding seam and improve the performance is one of the keys of the welding technology of the oil and gas conveying steel pipe.
Disclosure of Invention
The method aims to solve the problems in the prior art, namely, the problems in the prior art that how to reduce the cladding amount of base metal during welding of the large-caliber large-wall-thickness oil and gas conveying steel pipe, improve the cooling speed of a welding seam, improve the structure of the welding seam and improve the performance are solved. The invention provides a cold and hot welding wire matching welding device for an oil gas conveying steel pipe, which comprises a welding wire conveying mechanism, first welding equipment and second welding equipment, wherein the welding wire conveying mechanism comprises a welding wire conveying mechanism and a welding wire matching mechanism;
the welding wire conveying mechanism is used for conveying a first welding wire and a second welding wire at the same time, the first welding wire can be conveyed through the welding wire conveying mechanism to be connected with the first welding equipment, and the second welding wire can be conveyed through the welding wire conveying mechanism to be connected with the second welding equipment;
the welding wire conveying mechanism comprises a wheel base adjusting device and two groups of roller assemblies symmetrically arranged along the welding wire conveying direction; the roller wheel assembly comprises wire feeding wheel shafts arranged perpendicular to the welding wire feeding direction, and the wheel base adjusting device can adjust the axial distance between the two sets of the wire feeding wheel shafts so as to clamp or release the first welding wire and/or the second welding wire;
a first wire feeding wheel and a second wire feeding wheel are sleeved outside the wire feeding wheel shaft, and the first wire feeding wheel, the second wire feeding wheel and the wire feeding wheel shaft are insulated from each other; guide grooves used for being matched with the outer contours of the first welding wire and the second welding wire are formed in the circumferential direction of the first wire feeding wheel and the second wire feeding wheel respectively;
when the first welding wire/the second welding wire is clamped by the two first wire feeding wheels/the second wire feeding wheels, the two groups of roller wheel assemblies can respectively rotate around the axes of the roller wheel assemblies in opposite directions so as to drive the first welding wire/the second welding wire to displace along the axes of the roller wheel assemblies;
the first welding equipment and the second welding equipment comprise welding wire tracking mechanisms and welding guns, the welding wire conveying mechanisms are used for driving first welding wires/second welding wires to penetrate through the welding wire tracking mechanisms and move towards the welding guns, and the welding wire tracking mechanisms are used for adjusting relative poses between the first welding wires and the second welding wires.
In some preferred technical solutions, at least one guiding mechanism is further disposed between the welding wire feeding mechanism and the first welding device and/or the second welding device, and the guiding mechanism is configured to guide the first welding wire and/or the second welding wire.
In some preferred technical schemes, the device is further provided with a storage mechanism and a spraying mechanism, wherein the storage mechanism and the spraying mechanism are used for containing soldering flux, the storage mechanism is connected with the spraying mechanism, and the spraying mechanism is used for spraying the soldering flux.
In some preferred technical solutions, the welding wire feeding mechanism further includes a straightening roller assembly, the straightening roller assembly is configured to extrude and straighten the first welding wire/the second welding wire simultaneously, the straightening roller assembly includes at least five straightening roller sets, wherein the number of the fixed roller sets is equal to or one more than the number of the adjustable roller sets, and each straightening roller set includes two coaxially disposed straightening rollers.
In some preferred technical solutions, the welding wire tracking mechanism can travel along the extending direction of the welding seam.
In some preferred technical schemes, the welding wire tracking mechanism comprises a walking part, a fixing part and a posture adjusting part,
the walking part is used for matching with a guide rail, and the guide rail extends and is erected along the length direction of the welding line;
the fixed part is connected with the walking part, the fixed part is of a circular ring structure, the inner diameter of the circular ring structure is matched with the outer diameter of a first welding wire/a second welding wire, the first welding wire/the second welding wire penetrates through the circular ring structure and is connected with the welding gun, the fixed part can walk along the extending direction of the guide rail under the driving of the walking part, and the fixed part is used for fixing the welding wire;
the posture adjusting part is arranged on one side, deviating from the guide rail, of the welding wire tracking mechanism and used for driving the fixing part to rotate relative to the walking part so as to adjust the angle of the welding wire.
In some preferred technical solutions, the welding wire tracking mechanism can travel along the extending direction of the welding seam. The welding wire tracking mechanism is movably arranged on the guide rail and can move along the extension direction of the guide rail.
In some preferred technical solutions, the first wire feeding wheel and the second wire feeding wheel have the same structure and are both V-shaped wheels, and the guide groove is a V-shaped groove.
In some preferred technical solutions, the first wire feeding wheel, the second wire feeding wheel and the wire feeding wheel shaft are arranged in an insulated manner, two T-shaped insulating sleeves and insulating gaskets are sleeved on the wire feeding wheel shaft and sequentially connected to form two annular spaces, and the two annular spaces are respectively used for fixing the first wire feeding wheel and the second wire feeding wheel.
The invention provides a cold and hot welding wire matching welding system for an oil gas conveying steel pipe, which comprises a body structural member and a plurality of groups of cold and hot welding wire matching welding devices which are arranged on the body structural member and are arranged in any one of the technical schemes, wherein welding wire conveying mechanisms in all the groups are uniformly distributed along the arc shape, and welding wires conveyed in all the groups of cold and hot welding wire matching welding devices for the oil gas conveying steel pipe are linearly arranged.
In some preferred technical solutions, the first welding wire and the second welding wire in the system are respectively a hot welding wire and a cold welding wire, and the number of the cold welding wires is equal to the number of the hot welding wires, or the number of the cold welding wires is one less than the number of the hot welding wires.
In some preferred technical schemes, the number of the hot welding wires is four, the number of the cold welding wires is three, the four hot welding wires are linearly arranged, the three cold welding wires are sequentially distributed in gaps of the hot welding wires, the cold welding wires are inserted into electric arcs of the hot welding wires, and metal can be melted by using electric arc heat of the hot welding wires.
The invention has the beneficial effects that:
the welding wire conveying mechanism of the oil gas conveying steel pipe cold and hot welding wire matching welding device can guarantee synchronous conveying of the cold and hot welding wires, and the welding wires are insulated, so that the relative positions of the cold welding wires on a welding arc are stable. Further, the welding wire tracking mechanism guarantees reasonable adjustment of welding wire angles and welding wire distances.
The cold and hot welding wire matching welding system for the oil gas conveying steel pipe can weld the oil gas conveying steel pipe by adopting a welding method of four hot welding wires and three cold welding wires simultaneously. Four hot welding wires are arranged in a linear way, and three cold welding wires are sequentially distributed in the gaps of the hot welding wires. The cold wire is inserted into the arc of the hot wire and the heat of the hot wire arc is used to melt the metal. The cold and hot welding wires are arranged at intervals in a matched mode, so that the cladding amount of the welding wires in weld metal is increased, the cladding amount of base metal is reduced, the heat input amount to the base metal is reduced, overheating of a heat shadow area is reduced, the cooling speed of the weld is increased, the structure is improved, and the performance is improved.
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 diagram of the overall structure of a cold and hot welding wire matching welding system for an oil-gas conveying steel pipe according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a roller assembly according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an enlarged schematic view A of FIG. 2;
FIG. 4 is a schematic diagram of a wire tracking mechanism according to an embodiment of the present invention;
FIG. 5 is a schematic view of a stationary portion of the wire tracking mechanism according to an embodiment of the present invention;
FIG. 6 is a schematic view of a welding wire tracking mechanism and a guide rail according to an embodiment of the present invention;
list of reference numerals:
1-a body structural member; 2-a first welding wire; 3-a second welding wire; 4-a wire feeding mechanism; 5-a first welding device; 6-a second welding device; 7-a roller assembly; 8-a first wire feeding wheel; 9-a second wire feeding wheel; 10-a welding wire tracking mechanism, 11-a welding gun; 12-a storage mechanism; 13-a spraying mechanism; 14-straightening roller assemblies; 15-a guide rail; a 16-T shaped insulating sleeve; 17-an insulating spacer; 18-a wire feed wheel shaft; 19-wire feeding motor.
Detailed Description
In order to make the embodiments, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
The invention provides a cold and hot welding wire matching welding device for an oil gas conveying steel pipe, which comprises a body structural part, wherein a welding wire conveying mechanism, first welding equipment and second welding equipment are arranged on the body structural part;
the welding wire conveying mechanism is used for conveying a first welding wire and a second welding wire at the same time, the first welding wire can be conveyed through the welding wire conveying mechanism to be connected with first welding equipment, and the second welding wire can be conveyed through the welding wire conveying mechanism to be connected with second welding equipment;
the welding wire conveying mechanism comprises a wheel base adjusting device and two groups of roller assemblies which are symmetrically arranged along the welding wire conveying direction; the roller wheel assembly comprises wire feeding wheel shafts arranged perpendicular to the welding wire feeding direction, and the axle distance adjusting device can adjust the axial distance between the two sets of wire feeding wheel shafts so as to clamp or release the first welding wire and/or the second welding wire;
a first wire feeding wheel and a second wire feeding wheel are sleeved outside the wire feeding wheel shaft, and the first wire feeding wheel, the second wire feeding wheel and the wire feeding wheel shaft are insulated from each other; guide grooves used for being matched with the outer contours of the first welding wire and the second welding wire are formed in the circumferential direction of the first wire feeding wheel and the second wire feeding wheel respectively;
when the first welding wire/the second welding wire is clamped by the two first wire feeding wheels/the second wire feeding wheels, namely the first welding wire is clamped by the two first wire feeding wheels, the second welding wire is also clamped by the two second wire feeding wheels, and the two groups of roller wheel assemblies can respectively rotate around the axes of the roller wheel assemblies in opposite directions to drive the first welding wire/the second welding wire to displace along the axes of the roller wheel assemblies;
the first welding equipment and the second welding equipment are respectively provided with a welding wire tracking mechanism and a welding gun, the welding wire conveying mechanism is used for driving a first welding wire/a second welding wire to pass through the welding wire tracking mechanism and move towards the welding gun, and the welding wire tracking mechanism is used for adjusting the relative pose between the first welding wire and the second welding wire; the relative attitude in this application includes the angle and spacing between the first and second wires.
The invention also provides a cold and hot welding wire matching welding system for the oil gas conveying steel pipes, which comprises a plurality of cold and hot welding wire matching welding devices for the oil gas conveying steel pipes, wherein the body structural members of the cold and hot welding wire matching welding devices for the oil gas conveying steel pipes are connected with one another, and the welding wire conveying mechanisms in the groups are uniformly distributed along the arc shape.
In order to more clearly explain the cold and hot welding wire matching welding device for the oil and gas conveying steel pipe, a preferred embodiment of the invention is described in detail below with reference to the accompanying drawings.
As a preferred embodiment of the invention, the oil gas conveying steel pipe cold and hot welding wire matching welding device disclosed by the invention is shown in a figure 1, and comprises a body structural member 1, wherein a welding wire conveying mechanism 4, a first welding device 5 and a second welding device 6 are arranged on the body structural member 1;
the wire feeding mechanism 4 is configured to feed the first welding wire 2 and the second welding wire 3 at the same time, the first welding wire 2 can be fed by the wire feeding mechanism 4 to be connected to the first welding apparatus 5, and the second welding wire 3 can be fed by the wire feeding mechanism 4 to be connected to the second welding apparatus 6.
Furthermore, at least one guide mechanism is arranged between the wire feeding mechanism 4 and the first welding device 5 and/or the second welding device 6, and is used for guiding the first welding wire and the second welding wire 2 and/or the second welding wire 3 so that the welding wires can be smoothly connected with the welding device. The guide mechanism can be a roller, and the welding wire changes direction through the roller; or the guide means may be a guide tube, one end of which is connected to the output of the wire feeding means 4 and the other end of which is connected to the welding device, whereby the welding wire is introduced to be connected to the welding device.
Furthermore, the welding wire feeding mechanism further comprises a straightening roller assembly 14, the straightening roller assembly 14 is used for extruding and straightening the first welding wire 2/the second welding wire 3 at the same time, the straightening roller assembly 14 comprises at least five straightening roller sets, the number of the fixed roller sets is equal to or more than that of the adjustable roller sets, each straightening roller set comprises two coaxially arranged straightening rollers, so that the two welding wires can be straightened at the same time, namely the first welding wire 2 and the second welding wire 3. The welding wire straightened by the straightening roller component can have good rigidity and directivity, and the welding wire conveying mechanism is convenient to convey.
The welding wire conveying mechanism 4 comprises a wheel base adjusting device and two groups of roller assemblies 7 which are symmetrically arranged along the welding wire conveying direction; the roller assembly 7 comprises wire feed wheel shafts 18 arranged perpendicular to the wire feeding direction, and the distance between the two sets of wire feed wheel shafts 18 can be adjusted by the distance adjusting device to clamp or release the first welding wire 2 and/or the second welding wire 3.
Referring to fig. 2 and 3, preferably, the wire feeding wheel shaft 18 is externally sleeved with a first wire feeding wheel 8 and a second wire feeding wheel 9, and the first wire feeding wheel 8, the second wire feeding wheel 9 and the wire feeding wheel shaft 18 are insulated from each other. Specifically, two T-shaped insulating sleeves 16 and insulating gaskets 17 are sleeved on the wire feeding wheel shaft 18, the two T-shaped insulating sleeves 16 and the insulating gaskets 17 are sequentially connected to form two annular spaces, and the two annular spaces are respectively used for fixing the first wire feeding wheel 8 and the second wire feeding wheel 9 so as to prevent the first wire feeding wheel/the second wire feeding wheel from moving along the axial direction of the wire feeding wheel shaft 18. It is understood that the arrangement is only one preferred embodiment of the present invention, and those skilled in the art can also flexibly arrange the structure according to practical situations, for example, the wire feeding wheel and the wire feeding wheel shaft are both covered with an insulating material, preferably a rubber material, which can insulate to ensure the safety of the device, and can increase the friction force of the welding wire to enable the welding wire to move axially along the welding wire.
Specifically, the first wire feeding wheel 8 and the second wire feeding wheel 9 are respectively provided with a guide groove in the circumferential direction for matching the outer contour of the first welding wire 2 and the outer contour of the second welding wire 3; preferably, the first wire feeding wheel and the second wire feeding wheel have the same structure and are both V-shaped wheels, the guide groove is a V-shaped groove, and when the two roller wheel assemblies are close, the two V-shaped grooves which are symmetrically arranged are used for clamping with the outer contour of the welding wire, so that the first welding wire 2/the second welding wire 3 is clamped by the two first wire feeding wheels 8/the second wire feeding wheels 9.
When the first welding wire 2/the second welding wire 3 is clamped by the two first wire feeding wheels 8/the second wire feeding wheels 9, the axes of the two groups of roller wheel assemblies 7 are arranged in parallel and can respectively rotate around the own axes in opposite directions to drive the first welding wire 2/the second welding wire 3 to displace along the own axes; that is, when the two roller assemblies 7 rotate in opposite directions, the first welding wire 2 and the second welding wire 3 can be simultaneously moved in the feeding direction. Preferably, the welding wire feeding mechanism of the present application further comprises a driving device, the driving device comprises a wire feeding motor 19, and when both roller assemblies are driving roller assemblies, the wire feeding motor 19 can simultaneously drive the two roller assemblies to rotate oppositely around their axes; when only one of the two roller assemblies is the driving roller assembly, the wire feeding motor 19 drives only one roller assembly to move the welding wire in the feeding direction. Specifically, the output end of the wire feeding motor is coaxially connected with the wire feeding wheel shaft, and the wire feeding wheel shaft can be driven to rotate around the axis of the wire feeding wheel shaft, so that the welding wire is driven to move.
In some preferred embodiments of the present invention, each of the first welding apparatus 5 and the second welding apparatus 6 includes a wire tracking mechanism 10 and a welding gun 11, the wire feeding mechanism 4 is configured to drive the first welding wire 2/the second welding wire 3 through the wire tracking mechanism 10 and to move toward the welding gun 11, and the wire tracking mechanism 10 is configured to adjust a relative attitude between the first welding wire 2 and the second welding wire 3. It is understood that the pose is simply the abbreviation of position and pose, i.e., the wire tracking mechanism 10 can adjust the position of the second welding wire 3 relative to the first welding wire 2, i.e., the distance therebetween, and the angle between the second welding wire 3 relative to the first welding wire 2.
In the preferred embodiment of the invention, the welding wire tracking mechanism is connected with the walking device or integrally designed with the walking device, and the welding wire tracking mechanism can walk along the extending position of the welding line under the driving of the walking device so as to drive the welding wire to walk together to complete the welding task. The running gear can be a roller, a universal wheel, a gear rack, a roller screw and the like, which are not listed here.
In some preferred embodiments, referring to fig. 6, the body structure 1 is provided with a guide rail 15 extending perpendicular to the wire feeding direction, the guide rail 15 is located below the wire feeding mechanism 4, and the wire tracking mechanism 10 is movably arranged on the guide rail 15 and can move along the extending direction of the guide rail 15.
The welding wire tracking mechanism comprises a walking part, a fixing part and an attitude adjusting part, wherein the walking part is arranged on one side of the welding wire tracking mechanism close to the body structural part 1 and is used for being matched with the guide rail 15; the fixing portion is connected with the walking portion, referring to fig. 5, the fixing portion is of a circular ring structure, the inner diameter of the circular ring structure is matched with the outer diameter of the first welding wire/the second welding wire, the first welding wire/the second welding wire penetrate through the circular ring structure and are connected with a welding gun, the fixing portion can walk along the extending direction of the guide rail 15 under the driving of the walking portion, and the fixing portion is used for fixing the welding wire. It should be noted that, the guide rail 15 is correspondingly provided with scale marks above, so as to accurately control the distance between the cold and hot welding wires and facilitate manual adjustment.
The posture adjusting part is arranged on one side of the welding wire tracking mechanism 10, which is far away from the body structural part 1, and is used for driving the fixing part to rotate relative to the walking part so as to adjust the angle of the welding wire. Preferably, the posture adjusting part is arranged between the fixed part and the walking part and comprises a driving device and a rotating disc, and the output end of the driving device is connected with the rotating disc so that the rotating disc can rotate around the axis of the rotating disc. Further, the ring structure of fixed part is connected with the rotating disc to make the ring structure rotate under the drive of rotating disc, and its in-process that rotates, the ring structure can be around its connecting portion with the rotating disc as the center and rotate, and the welding wire passes the ring structure and can rotate along with the ring structure in the ring structure rotates the in-process.
It is understood that the body structure of the device of the present application may or may not be included in the present application, and may also serve as an external connector for connection to the device. In order to facilitate understanding of those skilled in the art, the related description of adding a body structure to provide a mounting platform for each mechanism in the device of the present application is shown in the above embodiments. Further, the welding wire feeding device is further provided with a controller, and the controller can automatically control the rotation angle of the rotating disc so as to adjust the angle of the welding wire relative to the original feeding direction of the welding wire. The controller is also capable of controlling the travel of the traveling part of the wire tracking mechanism 10, and in particular, the welding wire may control the traveling distance to adjust the relative distance between the first welding wire and the second welding wire.
It will be appreciated that the first welding device and the second welding device of the apparatus of the invention are independent, i.e. the second welding device can operate the feed speed of the second welding wire independently of the feed speed of the first welding wire. Preferably, the first wire is a hot wire and the second wire is a cold wire, i.e. a consumable electrode that melts without forming an arc.
In other preferred embodiments, the device is further provided with a storage mechanism 12 and a spraying mechanism 13 for containing soldering flux, wherein the storage mechanism 12 is connected with the spraying mechanism 13, and the spraying mechanism 13 is used for spraying the soldering flux so as to remove oil stains on the surface of the welded material, increase the welding area, assist heat conduction and protect the welding parent metal.
On the other hand, the application provides a cold and hot welding wire matching welding system for an oil-gas conveying steel pipe, as shown in fig. 1, the system comprises a body structural member 1 and a plurality of sets of cold and hot welding wire matching welding devices for the oil-gas conveying steel pipe, which are shown in the above embodiments and mounted on the body structural member 1. Specifically, the wire feeding mechanisms 4 in each set are evenly distributed along a circular arc. Preferably, the guide rails of each device extend in a collinear manner, i.e. the wire tracking mechanisms of each device are capable of moving along the same straight line relative to each other.
The first welding wire 2 and the second welding wire 3 in the system are respectively a hot welding wire and a cold welding wire, and the number of cold welding wires is preferably equal to the number of hot welding wires or one less than the number of hot welding wires.
Preferably, four groups of welding devices matched with cold and hot welding wires of the oil gas conveying steel pipe are arranged in the preferred embodiment of the application, and in order to ensure the welding quality of the large-caliber straight seam steel pipe for oil gas conveying and improve the welding efficiency, four-wire submerged arc welding is adopted. The multi-wire welding improves the production efficiency and correspondingly prolongs the stay time above the phase-change temperature. In order to save the volume and the installation space of the whole system, the fourth group of the oil gas conveying steel pipe cold and hot welding wire matching and welding device is not provided with second welding equipment, namely only four first welding equipment and three second welding equipment are arranged. The number of welding devices in a welding system may also be configured at will by those skilled in the art and is not further described herein.
The specific working principle of the system is as follows:
the welding wire is conveyed by controlling each welding wire conveying mechanism in the welding device, the first welding equipment is started, the first welding wire ignites a welding arc, and at the moment, the welding wire tracking mechanism of the second welding equipment is controlled to adjust the position of the second welding wire until the second welding wire enters a welding arc area generated by the first welding wire; the angle of the second welding wire is adjusted by the welding tracking mechanism to meet the requirements of the welding process, namely the welding system can weld the welding seam through four hot welding wires and three cold welding wires simultaneously. A welding tracking mechanism in the second welding device can control the second welding wire to move and rotate based on the position of the first welding wire so as to adjust the pose between the first welding wire and the second welding wire. Meanwhile, the first welding device and the second welding device can move along the extending direction of the welding seam at the same time so as to complete the welding task.
According to the preferred technical scheme, three cold welding wires are arranged in the middle of the gap of the four hot welding wires. When welding, the hot welding wire burns to generate electric arc, after the electric arc burns stably, the cold welding wire is inserted into the electric arc of the hot welding wire, and the heat of the electric arc of the hot welding wire is utilized to melt metal. The heat input amount depends on the current and voltage of the base material electrode. Compared with the prior art, the method has the advantages that the welding voltage and the welding current are not changed when only the hot welding wire is used for welding. Meanwhile, the heat input quantity of the base metal electrode and the welding wire electrode is not changed in unit time, and the melting quantity of the base metal and the welding wire is not changed in unit time. The cold wire is inserted into the hot wire arc and melted by the heat of the arc. The utilization rate of arc heat can be improved, and the cladding rate of weld metal is improved. When the same welding seam is filled, the welding speed can be increased, so that the welding linear energy is reduced, the stay time of the welding seam in a high-temperature area is reduced, the cooling speed of the welding seam and a heat affected area is accelerated, the structures of the welding seam and the heat affected area are improved, and the performance is improved. Due to the improvement of the welding speed, the production efficiency is correspondingly improved. The reduction of linear energy saves the energy consumption and reduces the welding deformation. The application has good comprehensive benefits.
Further, in the welding process of the welding system, the electric arc continuously fluctuates, and the wire feeding speed of the hot welding wire needs to be continuously adjusted according to the welding condition. The cold wire is inserted into the arc of the hot wire and the cold wire speed must be consistent with the hot wire speed. The first wire feeding wheel and the second wire feeding wheel of the welding wire conveying mechanism are respectively a hot welding wire conveying wheel and a cold welding wire conveying wheel which are equal in size and are arranged on the same wire feeding wheel shaft, so that the same conveying speed of the hot welding wire and the cold welding wire is guaranteed, and the cold welding wire and the hot welding wire can be synchronously conveyed. Insulation is arranged between the wire feeding wheels and the driving shaft, so that short circuit between cold and hot welding wires is prevented, and the stability of welding process parameters is guaranteed. The three cold welding wires are positioned in the gaps of the four hot welding wires, and the spatial position is limited. The welding wire of this application can adjust cold welding wire to suitable position, suitable angle according to the mechanism. The cold welding wire welding nozzle and the hot welding wire welding nozzle are insulated to prevent short circuit between the welding nozzles and ensure stable welding process. The proper position is determined according to the electric arc generated by the hot welding wire, as long as the cold welding wire can be ensured to be positioned in the electric arc generated by the hot welding wire; the proper angle is determined according to the welding process specification, the type of the welding process is different, and the angle between the cold welding wire and the hot welding wire is different.
It will be appreciated that the cold wire diameter and the hot wire diameter need to be properly configured for the application. The cold welding wire with too small diameter is easy to cause less cladding metal of the welding wire, and the structural performance is not obviously improved. The too large diameter of the cold welding wire influences the stability of the electric arc and the welding quality. In order to ensure the smooth implementation of the welding process and the expected structural performance, the diameter of the cold welding wire needs to be reasonably configured by those skilled in the art according to the process parameters such as the diameter of the hot welding wire, the welding current, the welding voltage and the like. In a preferred embodiment of the invention, the hot wire diameter is preferably 4mm and the cold wire diameter is preferably in
Meanwhile, when the diameter of the cold welding wire is too small, heat is wasted and the welding effect is not obvious; when the cold wire diameter is too large, the heat of the hot wire arc is not sufficient to completely melt the cold wire.
In the technical solution in the embodiment of the present application, at least the following technical effects and advantages are provided:
the welding wire conveying mechanism of the oil gas conveying steel pipe cold and hot welding wire matching welding device can guarantee synchronous conveying of the cold and hot welding wires, and the welding wires are insulated, so that the relative positions of the cold welding wires on a welding arc are stable. Further, the welding wire tracking mechanism guarantees reasonable adjustment of welding wire angles and welding wire distances.
The cold and hot welding wire matching welding system for the oil gas conveying steel pipe can weld the oil gas conveying steel pipe by adopting a welding method of four hot welding wires and three cold welding wires simultaneously. Four hot welding wires are arranged in a linear way, and three cold welding wires are sequentially distributed in the gaps of the hot welding wires. The cold wire is inserted into the arc of the hot wire and the heat of the hot wire arc is used to melt the metal. The cold and hot welding wires are arranged at intervals in a matched mode, so that the cladding amount of the welding wires in weld metal is increased, the cladding amount of base metal is reduced, the heat input amount to the base metal is reduced, overheating of a heat shadow area is reduced, the cooling speed of the weld is increased, the structure is improved, and the performance is improved.
It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element 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 cold and hot welding wire matching welding device for an oil gas conveying steel pipe is characterized by comprising a welding wire conveying mechanism, a first welding device and a second welding device;
the welding wire conveying mechanism is used for conveying a first welding wire and a second welding wire at the same time, the first welding wire can be conveyed through the welding wire conveying mechanism to be connected with the first welding equipment, and the second welding wire can be conveyed through the welding wire conveying mechanism to be connected with the second welding equipment;
the welding wire conveying mechanism comprises a wheel base adjusting device and two groups of roller assemblies symmetrically arranged along the welding wire conveying direction; the roller wheel assembly comprises wire feeding wheel shafts arranged perpendicular to the welding wire feeding direction, and the wheel base adjusting device can adjust the axial distance between the two sets of the wire feeding wheel shafts so as to clamp or release the first welding wire and/or the second welding wire;
a first wire feeding wheel and a second wire feeding wheel are sleeved outside the wire feeding wheel shaft, and the first wire feeding wheel, the second wire feeding wheel and the wire feeding wheel shaft are insulated from each other; guide grooves used for being matched with the outer contours of the first welding wire and the second welding wire are formed in the circumferential direction of the first wire feeding wheel and the second wire feeding wheel respectively;
when the first welding wire/the second welding wire is clamped by the two first wire feeding wheels/the second wire feeding wheels, the two groups of roller wheel assemblies can respectively rotate around the axes of the roller wheel assemblies in opposite directions so as to drive the first welding wire/the second welding wire to displace along the axes of the roller wheel assemblies;
the first welding equipment and the second welding equipment comprise welding wire tracking mechanisms and welding guns, the welding wire conveying mechanisms are used for driving first welding wires/second welding wires to penetrate through the welding wire tracking mechanisms and move towards the welding guns, and the welding wire tracking mechanisms are used for adjusting relative poses between the first welding wires and the second welding wires.
2. The matching welding device for cold and hot welding wires of oil and gas conveying steel pipes according to claim 1, wherein at least one guide mechanism is further arranged between the welding wire conveying mechanism and the first welding device and/or the second welding device, and the guide mechanism is used for guiding the first welding wire and/or the second welding wire.
3. The oil-gas conveying steel pipe cold-hot welding wire matching welding device according to claim 1, characterized in that a storage mechanism and a spraying mechanism are further arranged, wherein the storage mechanism is used for containing soldering flux and is connected with the spraying mechanism, and the spraying mechanism is used for spraying the soldering flux.
4. The welding device for matching cold and hot welding wires of the oil and gas conveying steel pipe according to claim 1, wherein the welding wire conveying mechanism further comprises a straightening roller assembly, the straightening roller assembly is used for extruding and straightening the first welding wire/the second welding wire at the same time, the straightening roller assembly comprises at least five straightening roller groups, the number of the fixed roller groups is equal to or one more than that of the adjustable roller groups, and each straightening roller group comprises two coaxially arranged straightening rollers.
5. The matched welding device for cold and hot welding wires of oil gas conveying steel pipes according to claim 1, wherein the welding wire tracking mechanism can walk along the extending direction of the welding seams.
6. The cold and hot welding wire matching welding device for the oil gas conveying steel pipe as claimed in claim 5, wherein the welding wire tracking mechanism comprises a walking part, a fixing part and a posture adjusting part,
the walking part is used for matching with a guide rail, and the guide rail extends and is erected along the length direction of the welding line;
the fixed part is connected with the walking part, the fixed part is of a circular ring structure, the inner diameter of the circular ring structure is matched with the outer diameter of a first welding wire/a second welding wire, the first welding wire/the second welding wire penetrates through the circular ring structure and is connected with the welding gun, the fixed part can walk along the extending direction of the guide rail under the driving of the walking part, and the fixed part is used for fixing the welding wire;
the posture adjusting part is arranged on one side, deviating from the guide rail, of the welding wire tracking mechanism and used for driving the fixing part to rotate relative to the walking part so as to adjust the angle of the welding wire.
7. The matched welding device for cold and hot welding wires of oil and gas conveying steel pipes according to claim 1, wherein the first wire feeding wheel and the second wire feeding wheel are identical in structure and are both V-shaped wheels, and the guide groove is a V-shaped groove.
8. The cold and hot welding wire matching welding device for the oil and gas conveying steel pipe as claimed in claim 1, wherein the first wire feeding wheel, the second wire feeding wheel and the wire feeding wheel shaft are arranged in an insulated manner, two T-shaped insulating sleeves and insulating gaskets are sleeved on the wire feeding wheel shaft, the two T-shaped insulating sleeves and the insulating gaskets are sequentially connected to form two annular spaces, and the two annular spaces are respectively used for fixing the first wire feeding wheel and the second wire feeding wheel.
9. A cold and hot welding wire matching welding system for an oil gas conveying steel pipe is characterized by comprising a body structural member and a plurality of groups of cold and hot welding wire matching welding devices for the oil gas conveying steel pipe, which are arranged on the body structural member, wherein the cold and hot welding wires matching welding devices for the oil gas conveying steel pipe are arranged in any one of the groups 1-8, and the welding wire conveying mechanisms in each group are uniformly distributed along the arc shape;
the first welding wire and the second welding wire are respectively a hot welding wire and a cold welding wire, and the number of the cold welding wires is equal to the number of the hot welding wires, or the number of the cold welding wires is one less than the number of the hot welding wires.
10. The oil-gas conveying steel pipe cold-hot welding wire matching welding system as claimed in claim 9, wherein the number of the hot welding wires is four, the number of the cold welding wires is three, the number of the hot welding wires is four, the three cold welding wires are sequentially distributed and arranged in gaps of the hot welding wires, the cold welding wires are inserted into arcs of the hot welding wires, and metal can be melted by arc heat of the hot welding wires.
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| CN202011446683.5A CN112570856B (en) | 2020-12-09 | 2020-12-09 | Cold and hot welding wire matching welding device and system for oil gas conveying steel pipe |
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