CN211708342U - Pipeline all-position automatic TIG welding machine - Google Patents
Pipeline all-position automatic TIG welding machine Download PDFInfo
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- CN211708342U CN211708342U CN202020147327.2U CN202020147327U CN211708342U CN 211708342 U CN211708342 U CN 211708342U CN 202020147327 U CN202020147327 U CN 202020147327U CN 211708342 U CN211708342 U CN 211708342U
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Abstract
The utility model discloses an automatic TIG welding machine of pipeline all-position belongs to automatic weld equipment technical field, has extensive application in the aspect of pipeline, the automatic welding of pipe butt joint all-position. The utility model discloses an automatic TIG welding machine of pipeline total position, including walking welding carriage, circular motion is done along the pipeline to the welding carriage, is provided with wire feeding mechanism and welder on the welding carriage automobile body, and the wire feeding mechanism end is provided with hot wire nozzle, and hot wire nozzle is the copper pipe, and hot wire nozzle one end is passed through the wire and is connected with heating power supply, still includes anodal connecting wire, and anodal connecting wire one end is connected with heating power supply, and the other end is the free end. The utility model provides a welding wire preheat the problem in current TIG welds, guarantee that the welding wire welds before, has preheated, has solved the adjustment problem that the distance of welder and welding pipe fitting can not be convenient, send a stability, effectively improved the welding quality and the welding efficiency that the pipeline all-position is automatic TIG welded.
Description
Technical Field
The utility model relates to an automatic TIG welding machine of pipeline all-position belongs to automatic weld equipment technical field, has extensive application in the aspect of pipeline, the automatic welding of pipe butt joint all-position.
Background
The automatic welding of all-position pipelines is various, and can be divided into hot wire welding and cold wire welding according to whether preheating is carried out before welding, wherein the hot wire welding refers to that welding wires are preheated before entering a molten pool, so that the cladding efficiency and the welding speed are greatly improved compared with the common cold wire welding. As a typical representative of high-efficiency argon arc welding, hot wire argon arc welding improves the melting speed and the filling speed of a welding wire by preheating the welding wire while ensuring the welding quality, thereby greatly improving the welding efficiency. Compared with the traditional cold wire TIG, the hot wire TIG has the following advantages: in the welding process, before the welding wire is fed into a welding pool, the welding wire is heated to a temperature close to the melting temperature of the welding wire by an independent hot wire power supply, so that the melting and filling speeds of the welding wire are increased, and the welding efficiency is greatly improved.
But current all-position automatic welding of pipes is dominated by cold wire welding. The welding speed of cold wire welding is low, and the welding efficiency is not high.
In addition, the distance between the welding gun and the welded pipe fitting in the welding process is long and short, namely the arc length of the welding gun cannot be adjusted according to the position of the welding gun relative to the pipeline, or only can be manually adjusted, so that the adjustment is inconvenient.
During all-position TIG welding, wire feeder generally dissociates outside the welding carriage, and on-the-spot welding's pipeline generally needs the multiple welding, and among the welding process, the seal wire pipe can be along with the operation of welding carriage, and the winding is on the pipeline, influences the stability that send a silk.
In conclusion, the existing pipeline all-position TIG welding machine has the problems that the hot wire welding is inconvenient to preheat, the arc length of a welding gun cannot be adjusted in time, the wire feeding is unstable and the like, and therefore the welding quality and the welding efficiency are affected.
Disclosure of Invention
The utility model aims to remedy the defect that degree of automation is low in the TIG welding of prior art, and welding quality and efficiency can't compromise, provide one kind and can realize that the welding wire preheats, and welder can be convenient in welding process adjusts, send the automatic TIG welding machine of stable pipeline full position.
The utility model discloses a realize through following technical scheme:
the utility model provides an automatic TIG welding machine of pipeline all-position, includes the welding carriage, the welding carriage is circular motion along the pipeline, is provided with wire drive feed mechanism and welder on the welding carriage automobile body, and the wire drive feed mechanism end is provided with hot wire mouth, and hot wire mouth one end is passed through the wire and is connected with heating power supply, still includes anodal connecting wire, and anodal connecting wire one end is connected with heating power supply, and the other end with by welding the workpiece connection.
Be provided with welder swing mechanism on the welding carriage, welder swing mechanism includes: the welding machine comprises a stepping motor A, a stepping motor mounting plate, a coupler, a screw rod A, a linear optical axis guide rail A, a linear bearing A, a ball screw, a linear bearing and screw mounting seat, an optical axis and screw fixing plate, wherein the linear bearing and screw mounting seat is fixed on a welding trolley; and the optical axis and the lead screw fixing plate are also connected with a welding gun deflection fixing seat. The stepping motor A rotates to drive the screw rod A to rotate around the ball screw, the screw rod A drives the stepping motor A, the stepping motor mounting plate, the shaft coupling, the linear optical axis guide rail A, the optical axis and screw rod fixing plate and the welding gun displacement fixing seat to swing left and right along the linear bearing A, and therefore the welding gun swing mechanism can drive the welding gun to swing left and right when welding is carried out, and welding materials can uniformly cover a welding opening.
Be provided with arc length adjustment mechanism on the welder swing mechanism, arc length adjustment mechanism includes: the linear optical axis sliding mechanism comprises a stepping motor B, a screw rod B, a nut, a linear optical axis guide rail B, a linear bearing B, a sliding part of an arc-length sliding table and a fixing part of the arc-length sliding table, wherein the stepping motor B and the linear optical axis guide rail B are fixed on the fixing part of the arc-length sliding table; the welding gun deflection rotating shaft is also fixed on the fixed part of the arc length sliding table, the welding gun is fixedly connected to the sliding part of the arc length sliding table through the fixture mounting plate, the fixture is mounted on the fixture mounting plate, and the fixture clamps the welding gun.
The sliding part of arc length slip table, fixedly connected with welder pivot that shifts, the other end rotation of welder pivot that shifts is connected on welder shifts the fixing base.
The wire feeder includes: the device comprises a stepping motor C, an adjusting knob, a driven guide shaft, a driven wheel seat, a driven wheel, a driving wheel, a tensioning sleeve, a wire feeding base and a flexible adjusting block; the wire feeding base is connected with the welding trolley, the stepping motor C is fixed on the wire feeding base, the driving wheel is connected to an output shaft of the stepping motor C, and an annular groove matched with the cross section of the welding wire is formed in the outer side surface of the driving wheel;
the driven wheel is rotationally connected to a driven wheel shaft, the driven wheel shaft is connected to a driven wheel seat, one end of a driven guide shaft is connected to the driven wheel seat, a guide hole matched with the driven guide shaft is formed in the wire feeding machine seat, and the driven wheel seat drives the driven guide shaft to slide in the guide hole; the flexible adjusting block is arranged in a groove on the driven wheel seat and located between the two driven guide shafts, an adjusting screw rod is connected to the wire feeding machine seat through threads, an adjusting knob is arranged at one end of the adjusting screw rod, and the other end of the adjusting screw rod abuts against the flexible adjusting block.
And a welding wire enters between the driven wheel and the driving wheel from the wire inlet joint and extends out of the wire outlet joint to enter the hot wire nozzle through the wire feeding pipe.
The welding trolley is also provided with a wire disc mechanism which comprises a wire feeding support, a wire disc shaft, a spring pressing ring, a spring, a pressing nut and a wire disc, wherein the wire feeding support is connected to the welding trolley; the wire disc shaft is provided with a limiting groove, the spring pressing ring is provided with a cylindrical pin, and the cylindrical pin can slide in the limiting groove.
The welding tractor is driven by the stepping motor, is adsorbed on the pipeline by magnetic force and rotates around the pipeline.
The device also comprises a storage and transportation vehicle, wherein the storage and transportation vehicle is provided with a control box, a welding power supply, a heating power supply, a circulating cooling water tank and an argon bottle; the control system is arranged in the control box.
The welding process of the all-position automatic TIG welding machine for the pipeline comprises the following steps:
straightening the end part of the cut pipe, correcting within 500mm from the end part of the pipe to ensure that the straightness of the pipe body reaches 0.85 per thousand, meeting the requirement of straightening precision, and ensuring that the axes of the two pipes are superposed after assembly only through correction treatment;
processing the groove, namely processing the two pipe ends into a V-shaped groove with a truncated edge by adopting a beveling machine or a lathe;
thirdly, dehumidifying the inside and outside of the pipe, in order to prevent moisture inside and outside the pipe from influencing the welding quality during welding, cleaning up media which generate moisture from water stain and oil stain within the range of 300mm away from the pipe end, and uniformly heating the outer wall of the pipe body by adopting oxygen-acetylene flame to evaporate the moisture;
fourthly, removing rust on the inner wall and the outer wall of the pipe, if the inner wall and the outer wall of the pipe are rusted, oxidized skin and corrosion pits appear due to medium corrosion, polishing and cleaning the inner wall and the outer wall of the pipe within a range of 30mm away from the pipe end and exposing metal luster, and polishing and removing rust on the inner wall and the outer wall of the pipe by adopting a straight-handle angle grinder and an inner grinder;
fifthly, assembling in a butt joint mode, namely placing the two pipe ends prepared for butt joint on a butt joint assembling and welding device on site for assembling, wherein the assembling gap is 0-0.5mm, and checking the centering condition by using a steel plate ruler to ensure that the butt joint misalignment is not more than a specified value of 0.5 mm;
and (seventhly) filling protective gas into the tube, and filling argon with the quality purity not lower than 99.99% into the tube before welding, wherein the flow of the argon is 8-12L/min, so as to ensure that the back seam is not oxidized and the forming is good.
(eighth), adsorbing the welding trolley on the side of the welding opening of the pipe body, enabling the welding gun to be opposite to the welding seam, adjusting the position of a hot wire nozzle, enabling the sent welding wire to be in the center of the welding seam below the tungsten electrode, and adjusting the distance between the tungsten electrode and the welding wire to be 2-3 mm;
(nine) welding process adjustment and storage
Adopting a process method of layered and interval welding, filling the groove in 3 layers and one way: backing welding without filler wires, filling welding and cover welding; backing welding divides the all-position welding line into 8 sections; filling welding and cover surface welding are carried out in 2 intervals; the welding wire is ER50-6, and the diameter is 1.0 mm; a tungsten electrode: a cerium tungsten electrode with a diameter of 2.4 mm; power type and polarity: direct current is connected positively; argon flow: 8-12L/min; arcing position: clock 0:00 point position, arc-closing lap amount: 10 degrees;
the welding process parameters are set as follows:
backing welding without wire filling: dividing into 8 intervals: 0 to 45 degrees is a first interval, 45 to 90 degrees is a second interval, 90 to 135 degrees is a third interval, 135 to 180 degrees is a fourth interval, 180 to 225 degrees is a fifth interval, 225 to 270 degrees is a sixth interval, 270 to 315 degrees is a seventh interval, 315 to 360 degrees is an eighth interval, the welding current is 220 and 250A, the voltage is 13.8 to 14.4V, and the rotating speed is 100 mm/min;
filling and welding: dividing into 2 intervals: 0-180 degrees is a first interval, 180-360 degrees is a second interval, the welding current is 200-220A, the voltage is 13.1-13.7V, the hot wire current is 100A, the rotating speed is 150mm/min, the wire feeding speed is 3000mm/min, the yaw speed is 1000mm/min, and the yaw width is 4 mm;
cover surface welding: dividing into 2 intervals: 0-180 degrees is a first interval, 180-360 degrees is a second interval, the welding current is 220-250A, the voltage is 14.9-16.0V, the hot wire current is 100A, the rotating speed is 150mm/min, the wire feeding speed is 3000mm/min, the yaw speed is 1400mm/min, and the yaw width is 10 mm;
and (ten) calling a welding process, operating equipment to automatically weld, before formal welding, firstly performing simulated welding in order to check whether a program is suitable for a workpiece to be welded, observing the normal condition, then pressing a start switch to weld, and performing fine adjustment on welding parameters by tracking and observing the operation state of a machine head and the state of a real-time molten pool by an operator in the welding process until the whole welding process is finished.
The utility model has the advantages that:
(1) the welding trolley is provided with a hot wire nozzle, the hot wire nozzle is connected with a heating power supply, and the welding trolley is also provided with an anode connecting wire, one end of the anode connecting wire is connected with the heating power supply, and the other end of the anode connecting wire is in contact with a pipeline to be welded, so that a loop is formed, and a welding wire is heated when passing through the hot wire nozzle, so that the welding wire is ensured to be preheated before entering a welding pool.
(2) The welding trolley is provided with a welding gun swinging mechanism and an arc length adjusting mechanism which are driven by a stepping motor, a welding gun connected with the welding machine is arranged on the arc length adjusting mechanism, the welding gun swinging mechanism and the arc length adjusting mechanism are both connected with a control system, so that the welding gun can automatically realize swinging and arc length adjustment in the welding process, the welding trolley is suitable for welding weldments with groove requirements and workpieces with obvious ovality, manual adjustment or intervention is not needed, closed-loop control is realized, the labor intensity of operators is low, and the welding quality is also easy to guarantee.
(3) The welding gun fixing device is rotationally connected with the end part of the welding gun swinging mechanism, and when the welding gun needs to be disassembled, the welding gun can be rotated to a position far away from the circle center of the pipeline, so that the operation is convenient.
(4) Wire feeding mechanism sets up on the dolly, has avoided the welding wire winding on the welded tube way, and is provided with adjust knob, send a stability to improve welding quality.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural view of a welding gun swing mechanism of the present invention;
fig. 3 is a schematic view of the structure of the middle arc length adjusting mechanism of the present invention;
fig. 4 is a left side view structural schematic diagram of the middle arc length adjusting mechanism of the present invention;
FIG. 5 is a schematic sectional view B-B of FIG. 4;
FIG. 6 is a schematic front view of the wire feeding mechanism of the present invention;
FIG. 7 is a left side view of the wire feeding mechanism of the present invention;
FIG. 8 is a schematic sectional view A-A of FIG. 6;
fig. 9 is a schematic front view of the middle wire reel mechanism of the present invention;
fig. 10 is a schematic sectional structure view of C-C in fig. 9. In the figure:
1 welding gun, 2 welding gun swinging mechanisms, 3 arc length adjusting mechanisms, 4 hot wire nozzles, 5 wire feeding mechanisms, 6 stepping motors A, 7 stepping motor mounting plates, 8 couplings, 9 screw rods A, 10 linear optical axis guide rails A, 11 ball screws, 12 linear bearings and screw nut mounting seats, 13 welding trolleys, 14 optical axis and screw rod fixing plates, 15 welding gun displacement fixing seats, 16 stepping motors B, 17 screw rods B, 18 screw nuts, 19 arc length sliding tables, 20 arc length sliding tables, 21 linear optical axis guide rails B, 22 linear bearings B, 23 welding gun displacement rotating shafts, 24 clamps, 25 clamp mounting plates, 26 adjusting knobs, 27 driven guide shafts, 28 driven wheel seats, 29 wire inlet joints, 30 driving wheels, 31 tensioning sleeves, 32 wire feeding machine seats, 33 driven wheels, 34 wire outlet joints, 35 stepping motors C, 36 flexible adjusting blocks, 37 wire feeding supports, 38 wire disc shaft, Spring 39, spring 40, compression ring 41, compression nut 42.
Detailed Description
For better illustration of the technical solution of the present invention, the following description is made with reference to the accompanying drawings:
referring to fig. 1, the all-position automatic TIG welding machine for pipelines comprises a welding trolley, wherein the welding trolley moves circularly along the pipeline, a wire feeding mechanism 5 and a welding gun 1 are arranged on a trolley body of the welding trolley, a hot wire nozzle 4 is arranged at the tail end of the wire feeding mechanism 5, the hot wire nozzle 4 is a copper pipe, one end of the hot wire nozzle 4 is connected with a heating power supply through a wire, the all-position automatic TIG welding machine further comprises an anode connecting wire, one end of the anode connecting wire is connected with the heating power supply, and the other end of the anode connecting wire. When in use, the free end is contacted with a pipeline to be welded, so that a loop is formed, and a welding wire is heated when passing through the hot wire nozzle 4, so that the welding wire is ensured to be preheated before entering a welding pool.
Referring to fig. 2, a welding torch swinging mechanism 2 is disposed on the welding carriage, and the welding torch swinging mechanism 2 includes: a stepping motor A6, a stepping motor mounting plate 7, a shaft coupling 8, a screw A9, a linear optical axis guide rail A10, a linear bearing A, a ball screw 11, a linear bearing and screw mounting seat 12, an optical axis and screw fixing plate 14, the linear bearing and nut mounting seat 12 is fixed at one end of the welding trolley, the stepping motor A6 is installed on the stepping motor mounting plate 7, one end of the screw rod A9 is connected to the output shaft of the stepping motor A6 through the coupler 8, the other end of the screw rod A9 is rotatably connected to the optical axis and screw rod fixing plate 14 through a bearing, one end of the linear optical axis guide rail A10 is fixed on the motor mounting plate, the other end of the linear optical axis guide rail A10 is fixed on the optical axis and screw rod fixing plate 14, the ball nut 11 and the linear bearing A are installed on the linear bearing and nut mounting seat 12, the ball nut 11 is meshed with the screw rod A9, and the linear bearing A can slide along the linear optical axis guide rail; the optical axis and lead screw fixing plate 14 is also connected with a welding gun deflection fixing seat 15. The stepping motor A6 rotates to drive the screw rod A9 to rotate around the ball screw nut 11, the screw rod A9 drives the stepping motor A6, the stepping motor mounting plate 7, the coupler 8, the linear optical axis guide rail A10, the optical axis and screw rod fixing plate 14 and the welding gun displacement fixing seat 15 to swing left and right along the linear bearing A, and therefore the welding gun swing mechanism 2 can drive the welding gun to swing left and right when welding is carried out, and welding materials can uniformly cover a welding opening.
Referring to fig. 3 to 5, an arc length adjusting mechanism 3 is disposed on the welding gun swinging mechanism 2, and the arc length adjusting mechanism 3 includes: the linear optical axis sliding mechanism comprises a stepping motor B16, a lead screw B17, a nut 18, a linear optical axis guide rail B21, a linear bearing B22, an arc-length sliding table sliding part 19 and an arc-length sliding table fixing part 20, wherein the stepping motor B16 and the linear optical axis guide rail B21 are fixed to the arc-length sliding table fixing part 20, one end of a lead screw B17 is connected to an output shaft of the stepping motor B16, the linear bearing B22 and the nut 18 are fixed to the arc-length sliding table sliding part 19, the nut 18 is meshed with a lead screw B17, and the linear bearing B22 can slide along a linear optical axis guide rail B21; the welding gun displacement rotating shaft 23 is also fixed on the arc length sliding table fixing part 20, the welding gun 1 is fixedly connected to the arc length sliding table sliding part 19 through a clamp mounting plate 25, a clamp 24 is mounted on the clamp mounting plate 25, and the clamp 24 clamps the welding gun 1. The stepping motor B16 rotates to drive the screw rod B17 to rotate, the screw rod B17 drives the screw nut 18, the arc length sliding table sliding part 19 and the linear bearing B22 to move along the linear optical axis guide rail B21 together, so that the arc length adjusting mechanism 3 can enable a welding gun to automatically move close to and away from a pipe fitting in the welding process when welding is carried out, when the pipe fitting has obvious ovality, the arc voltage acquisition device can automatically acquire arc voltage in the welding process, the voltage signal is converted into a current signal through the current sensor and transmitted to the control system in real time, the control system compares the acquired arc voltage with the set arc voltage upper limit and lower limit, the arc voltage is related to the arc length under the condition that the welding current is unchanged, the longer arc voltage is larger, and the shorter arc voltage is smaller. And when the real-time arc voltage signal is greater than the set upper limit value, the welding gun moves towards the direction close to the pipe fitting. And when the real-time arc voltage signal is smaller than the set lower limit value, the welding gun moves towards the direction far away from the pipe fitting. And when the real-time arc voltage signal is smaller than the set upper limit value and larger than the set lower limit value, the welding gun stops moving.
On arc length slip table fixed part 20, fixedly connected with welder pivot 23 that shifts, the other end of welder pivot 23 that shifts rotates to be connected on welder fixing base 15 that shifts. The arc length adjusting mechanism 3 is connected with the welding gun deflection rotating shaft 23, and when the welding gun 1 is detached, the welding gun 1 can be conveniently rotated to a position far away from the circle center of a welded pipe fitting, so that the welding gun 1 is prevented from being damaged.
The welding gun swinging mechanism 2 and the arc length adjusting mechanism 3 can ensure that the welding gun 1 can swing left and right and slide up and down on the welding trolley, and the position of the welding gun 1 relative to a weldment can be conveniently adjusted in the welding process. In addition, when carrying out welder 1 and changing, welder fixing device rotates with the tip of welder swing mechanism 2 and is connected, can rotate welder 1 to the position of keeping away from the pipeline centre of a circle, convenient operation.
Referring to fig. 6 to 8, the wire feeder 5 is disposed at the other end of the welding carriage, and the wire feeder 5 includes: a stepping motor C35, an adjusting knob 26, two driven guide shafts 27, a driven wheel seat 28, a driven wheel 33, a driving wheel 30, a tension sleeve 31, a wire feeding machine seat 32 and a flexible adjusting block 36; the wire feeder base 32 is connected with the welding trolley, the stepping motor C35 is fixed on the wire feeder base 32, the driving wheel 30 is connected on the output shaft of the stepping motor C35, and the outer side surface of the driving wheel 30 is provided with an annular groove matched with the cross section of the welding wire;
the driven wheel 33 is rotatably connected to a driven wheel shaft through a bearing, the driven wheel shaft is connected to the driven wheel seat 28, one end of each of 2 driven guide shafts 27 is connected to the driven wheel seat 28, a guide hole matched with the driven guide shaft 27 is formed in the wire feeding machine seat 32, the driven wheel seat 28 drives the driven guide shaft 27 to slide in the guide hole in the wire feeding machine seat 32, the flexible adjusting block 36 is arranged in a groove in the driven wheel seat 28 and located between the two driven guide shafts 27, an adjusting screw rod is connected to the wire feeding machine seat 32 through threads, one end of the adjusting screw rod is provided with the adjusting knob 26, and the other end of the adjusting screw rod abuts against the flexible adjusting block 36; the two sides of the wire feeding base 32 are respectively provided with a wire inlet joint 29 and a wire outlet joint 34, welding wires enter between the driven wheel 33 and the driving wheel 30 from the wire inlet joint 29, extend out of the wire outlet joint 34 and enter the hot wire nozzle 4 through a wire feeding pipe, the welding wires are pressed in an annular groove on the driving wheel 30 by the driven wheel 33, and the pressure of the flexible adjusting block 36 on the driven wheel 33 can be adjusted by manually rotating the adjusting knob 26 so as to adjust the pressure on the welding wires and further prevent the welding wires from slipping between the driven wheel 33 and the driving wheel 30; wire feeding mechanism 5 sets up on the welding carriage, has avoided the welding wire distance far away, influences and send a stability, and can effectively avoid the welding wire winding on the pipe fitting, leads to sending a unstability.
Referring to fig. 9 to 10, the welding carriage is further provided with a wire reel mechanism, which includes a wire feeding bracket 37, a wire reel shaft 38, a spring pressing ring 40, a spring 39, a pressing nut 41 and a wire reel 42, the wire feeding bracket 37 is connected to the welding carriage, one end of the wire feeding shaft is fixedly mounted on the wire feeding bracket 37, the wire reel shaft 38 is sequentially sleeved with the spring 39, the spring pressing ring 40 and the wire reel 42, the other end of the wire feeding shaft is connected with the pressing nut 41, and the pressing nut 41 presses the wire reel 42 against the spring pressing ring 40; the wire disc shaft 38 is provided with a limiting groove, and the spring pressing ring 39 is provided with a cylindrical pin which can slide in the limiting groove.
The welding tractor is driven by the stepping motor, is adsorbed on the pipeline by magnetic force and rotates around the pipeline.
The embodiment also comprises a storage and transportation vehicle, wherein the storage and transportation vehicle is provided with a control box, a welding power supply, a heating power supply, a circulating cooling water tank and an argon bottle. The storage and transportation vehicle can conveniently transport various tools and instruments required by welding, is more suitable for field welding operation, and can avoid omission of the tools and the instruments. The control system is arranged in the control box, and the stepping motor A6, the stepping motor B16, the stepping motor C35, the welding trolley, the welding power supply and the heating power supply are all connected with the control system.
Use the utility model discloses the welding process of the automatic TIG welding machine of pipeline all position includes following step:
straightening the end part of the cut pipe, correcting within 500mm from the end part of the pipe to ensure that the straightness of the pipe body reaches 0.85 per thousand, meeting the requirement of straightening precision, and ensuring that the axes of the two pipes are superposed after assembly only through correction treatment;
processing the groove, namely processing the two pipe ends into a 75-degree V-shaped groove by adopting a beveling machine or a lathe, wherein the V-shaped groove is single-sided at 37.5 degrees and is truncated at 1-1.5 mm;
thirdly, dehumidifying the inside and outside of the pipe, in order to prevent moisture inside and outside the pipe from influencing the welding quality during welding, cleaning up media which generate moisture from water stain and oil stain within the range of 300mm away from the pipe end, and uniformly heating the outer wall of the pipe body by adopting oxygen-acetylene flame to evaporate the moisture;
fourthly, removing rust on the inner wall and the outer wall of the pipe, if the inner wall and the outer wall of the pipe are corroded by a medium to generate rust, oxide skin and corrosion pits, polishing and cleaning the inner wall and the outer wall of the pipe within a range of 30mm away from the pipe end and exposing metallic luster, and polishing and removing rust on the inner wall and the outer wall of the pipe by a straight-handle angle grinder and an inner grinder;
fifthly, assembling in a butt joint mode, namely placing the two pipe ends prepared for butt joint on a butt joint assembling and welding device on site for assembling, wherein the assembling gap is 0-0.5mm, and checking the centering condition by using a steel plate ruler to ensure that the butt joint misalignment is not more than a specified value of 0.5 mm;
and (seventhly) filling protective gas into the tube, and filling argon with the quality purity not lower than 99.99% into the tube before welding, wherein the flow of the argon is 8-12L/min, so as to ensure that the back seam is not oxidized and the forming is good.
(eighth) adsorbing the welding trolley on the side of the welding opening of the pipe body, enabling the welding gun 1 to be opposite to the welding seam and perpendicular to the tangent line of the pipe body, adjusting the position of a hot wire nozzle, enabling the sent welding wire to be in the center of the welding seam below the tungsten electrode, and adjusting the distance between the tungsten electrode and the welding wire to be 2-3 mm;
(nine) welding process adjustment and storage
Adopting a process method of layered and interval welding, filling the groove in 3 layers and one way: backing welding without filler wires, filling welding and cover welding; backing welding divides the all-position welding line into 8 sections, filling welding and cover surface welding are divided into 2 sections for welding; the welding wire is ER50-6, and the diameter is 1.0 mm; a tungsten electrode: a cerium tungsten electrode with a diameter of 2.4 mm; power type and polarity: direct current is connected positively; argon flow: 8-12L/min; arcing position: clock 0:00 point position, arc-closing lap amount: 10 degrees;
the welding process parameters are set as follows:
backing welding without wire filling: dividing into 8 intervals: 0 to 45 degrees is a first interval, 45 to 90 degrees is a second interval, 90 to 135 degrees is a third interval, 135 to 180 degrees is a fourth interval, 180 to 225 degrees is a fifth interval, 225 to 270 degrees is a sixth interval, 270 to 315 degrees is a seventh interval, 315 to 360 degrees is an eighth interval, the welding current is 220 and 250A, the voltage is 13.8 to 14.4V, and the rotating speed is 100 mm/min;
filling and welding: dividing into 2 intervals: 0-180 degrees is a first interval, 180-360 degrees is a second interval, the welding current is 200-220A, the voltage is 13.1-13.7V, the hot wire current is 100A, the rotating speed is 150mm/min, the wire feeding speed is 3000mm/min, the yaw speed is 1000mm/min, and the yaw width is 4 mm;
cover surface welding: dividing into 2 intervals: 0-180 degrees is a first interval, 180-360 degrees is a second interval, the welding current is 220-250A, the voltage is 14.9-16.0V, the hot wire current is 100A, the rotating speed is 150mm/min, the wire feeding speed is 3000mm/min, the yaw speed is 1400mm/min, and the yaw width is 10 mm;
calling a welding process, operating equipment to automatically weld, before formal welding, firstly performing simulated welding in order to check whether a program is suitable for a workpiece to be welded, observing the normal condition, then pressing a 'start' switch to weld, and performing fine adjustment on welding parameters by tracking and observing the operation state of a machine head and the state of a real-time molten pool by an operator in the welding process until the whole welding process is finished;
and (eleventh) inspecting after welding, namely inspecting whether the welding seam has defects such as cracks, pores and the like by adopting an appearance inspection method, a penetration inspection method and an X-ray inspection method, and if the defects are not detected, indicating that the possibility of the defects in the welding seam is low.
To sum up, the utility model solves the problem of preheating the welding wire in the existing TIG welding, and ensures that the welding wire is preheated before being welded; the problem of the distance of welder 1 and welded pipe fitting can not convenient adjustment is solved, send a stability, effectively improved the welding quality and the welding efficiency of the automatic TIG welding of pipeline all position.
It should be noted that the above-mentioned embodiments are exemplary, and those skilled in the art can make various modifications and variations to the pipe full position automatic TIG welding machine based on the above-mentioned embodiments under the above teaching of the present invention, and these modifications and variations fall within the scope of the present invention.
It will be appreciated by persons skilled in the art that the foregoing detailed description is merely illustrative of the invention,
and not as limiting the invention. The scope of the invention is defined by the claims and their equivalents.
Claims (9)
1. The utility model provides an automatic TIG welding machine of pipeline all position, includes the welding carriage, the welding carriage is circular motion, its characterized in that along the pipeline: the welding trolley comprises a welding trolley body and is characterized in that a wire feeding mechanism and a welding gun are arranged on the welding trolley body, a hot wire nozzle is arranged at the tail end of the wire feeding mechanism, one end of the hot wire nozzle is connected with a heating power supply through a wire, the welding trolley further comprises an anode connecting wire, one end of the anode connecting wire is connected with the heating power supply, and the other end of the anode connecting wire is connected with a workpiece to.
2. An all position automatic TIG welding machine for pipes as set forth in claim 1 wherein: be provided with welder swing mechanism on the welding carriage, welder swing mechanism includes: the welding machine comprises a stepping motor A, a stepping motor mounting plate, a coupler, a screw rod A, a linear optical axis guide rail A, a linear bearing A, a ball screw, a linear bearing and screw mounting seat, an optical axis and screw fixing plate, wherein the linear bearing and screw mounting seat is fixed on a welding trolley; and the optical axis and the screw rod fixing plate are also connected with a welding gun deflection fixing shaft seat.
3. An all position automatic TIG welding machine for pipes as set forth in claim 2 wherein: be provided with arc length adjustment mechanism on the welder swing mechanism, arc length adjustment mechanism includes: the linear optical axis sliding mechanism comprises a stepping motor B, a screw rod B, a nut, a linear optical axis guide rail B, a linear bearing B, a sliding part of an arc-length sliding table and a fixing part of the arc-length sliding table, wherein the stepping motor B and the linear optical axis guide rail B are fixed on the fixing part of the arc-length sliding table; the welding gun deflection rotating shaft is also fixed on the fixed part of the arc length sliding table, the welding gun is fixedly connected to the sliding part of the arc length sliding table through the fixture mounting plate, the fixture is mounted on the fixture mounting plate, and the fixture clamps the welding gun.
4. An all position automatic TIG welding machine for pipes as set forth in claim 3 wherein: the sliding part fixedly connected with welder of arc length slip table changes the pivot, and the other end that welder shifted the pivot rotates to be connected on welder shifts the fixing base.
5. An all position automatic TIG welding machine for pipes as set forth in claim 1 wherein: the wire feeder includes: the device comprises a stepping motor C, an adjusting knob, a driven guide shaft, a driven wheel seat, a driven wheel, a driving wheel, a tensioning sleeve, a wire feeding base and a flexible adjusting block; the wire feeding base is connected with the welding trolley, the stepping motor C is fixed on the wire feeding base, the driving wheel is connected to an output shaft of the stepping motor C, and an annular groove matched with the cross section of the welding wire is formed in the outer side surface of the driving wheel; the driven wheel is rotationally connected to a driven wheel shaft, and the driven wheel shaft is connected to a driven wheel seat; one end of the driven guide shaft is connected to the driven wheel seat, a guide hole matched with the driven guide shaft is formed in the wire feeding machine seat, the driven wheel seat drives the driven guide shaft to slide in the guide hole, the flexible adjusting block is arranged in a groove in the driven wheel seat and located between the two driven guide shafts, an adjusting screw rod is connected to the wire feeding machine seat through threads, an adjusting knob is arranged at one end of the adjusting screw rod, and the other end of the adjusting screw rod abuts against the flexible adjusting block.
6. An all position automatic TIG welding machine for pipes as set forth in claim 5 and wherein: and a welding wire enters between the driven wheel and the driving wheel from the wire inlet joint and extends out of the wire outlet joint to enter the hot wire nozzle through the wire feeding pipe.
7. An all position automatic TIG welding machine for pipes as set forth in claim 1 wherein: the welding trolley is also provided with a wire disc mechanism which comprises a wire feeding support, a wire disc shaft, a spring pressing ring, a spring, a pressing nut and a wire disc, wherein the wire feeding support is connected to the welding trolley; the wire disc shaft is provided with a limiting groove, the spring pressing ring is provided with a cylindrical pin, and the cylindrical pin can slide in the limiting groove.
8. An all position automatic TIG welding machine for pipes as set forth in claim 1 wherein: the welding tractor is driven by the stepping motor, is adsorbed on the pipeline by magnetic force and rotates around the pipeline.
9. An all position automatic TIG welding machine for pipes as set forth in claim 1 wherein: the device also comprises a storage and transportation vehicle, wherein the storage and transportation vehicle is provided with a control box, a welding power supply, a heating power supply, a circulating cooling water tank and an argon bottle; the control system is arranged in the control box.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020147327.2U CN211708342U (en) | 2020-01-25 | 2020-01-25 | Pipeline all-position automatic TIG welding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020147327.2U CN211708342U (en) | 2020-01-25 | 2020-01-25 | Pipeline all-position automatic TIG welding machine |
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| CN211708342U true CN211708342U (en) | 2020-10-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548423A (en) * | 2020-12-10 | 2021-03-26 | 宁波杭钢富春管业有限公司 | Single-gun and double-gun automatic welding equipment for lock catch |
| CN112935478A (en) * | 2021-02-04 | 2021-06-11 | 湖南理工学院 | Welding device and welding process for hydrogen conveying pipeline for outdoor processing |
| CN114131158A (en) * | 2021-12-21 | 2022-03-04 | 一重集团大连核电石化有限公司 | Portable flexible track TIG welding tractor |
-
2020
- 2020-01-25 CN CN202020147327.2U patent/CN211708342U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548423A (en) * | 2020-12-10 | 2021-03-26 | 宁波杭钢富春管业有限公司 | Single-gun and double-gun automatic welding equipment for lock catch |
| CN112935478A (en) * | 2021-02-04 | 2021-06-11 | 湖南理工学院 | Welding device and welding process for hydrogen conveying pipeline for outdoor processing |
| CN114131158A (en) * | 2021-12-21 | 2022-03-04 | 一重集团大连核电石化有限公司 | Portable flexible track TIG welding tractor |
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