A welding device specially used for thin-walled welded steel pipes

Abstract

The utility model discloses a welding device specially used for thin-walled steel pipe welding, which relates to the field of thin-walled steel pipe welding, including a support frame, the inner side of the support frame is rotatably connected with two groups of driving wheels, the two groups of driving wheels are connected through a transmission mechanism, a bracket is welded on the top of the support frame, a fan-shaped groove is opened on the top of the bracket and runs through the bottom end of the bracket, the inner wall of the fan-shaped groove is movably connected with a connecting cover, and the top of the bracket is equipped with a reciprocating driving mechanism that drives the connecting cover to move along the inner wall of the electric welding wire; a feed tray is rotatably installed on the outer side of the vertical plate part of the bracket, and the outer wall of the feed tray is wound with electric welding wire. The utility model realizes that the tungsten needle cooperates with the moving steel pipe to form a "Z"-shaped welding track by setting a reciprocating driving mechanism, and the welding area is larger, the welding effect is better, and the problem of false welding is not easy to occur.

Description

Technical Field

[0001] The utility model relates to the field of thin-wall steel pipe welding, in particular to a welding device specially used for thin-wall welded steel pipes. Background Art

[0002] The thin-walled metal plate is formed into a steel pipe after being corrected by multiple sets of pressing wheels. Then a welding machine is needed to weld the gaps to form a seamless steel pipe.

[0003] In the prior art, during welding, the connection cover and the tungsten needle inside it are both aligned with the gap and do not move. This welding method has the problem of a small welding area, which leads to a weak connection force at the weld. Utility Model Content

[0004] The purpose of the utility model is to provide a welding device specially used for thin-walled welded steel pipes in order to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a welding device specially used for thin-walled welded steel pipes, comprising a support frame, the inner side of the support frame is rotatably connected with two sets of driving wheels, the two sets of driving wheels are connected through a transmission mechanism, a bracket is welded on the top of the support frame, a fan-shaped groove is opened on the top of the bracket and runs through the bottom end of the bracket, a connecting cover is movably connected to the inner wall of the fan-shaped groove, and a reciprocating driving mechanism that drives the connecting cover to move along the inner wall of the fan-shaped groove is installed on the top of the bracket;

[0006] A feeding tray is rotatably mounted on the outer side of the vertical plate portion of the bracket, and an electric welding wire is wound around the outer wall of the feeding tray. A feeding mechanism for driving the electric welding wire to perform wire feeding operation is mounted on the top of the support frame.

[0007] As a further solution of the utility model: the reciprocating drive mechanism includes a protruding ear integrally formed on the outer wall of the connecting cover, one end of the protruding ear is fixedly connected to a rotating shaft rotatably connected to the bracket, the top of the rotating shaft is interference fitted with a passive gear, the bottom end of the rotating shaft is integrally formed with a connecting disk, and a torsion spring is engaged and connected between the top end of the connecting disk and the bottom end of the bracket;

[0008] A half gear is meshed on the outer periphery of the passive gear, a rotating motor driving the half gear to rotate is installed at the bottom end of the bracket, and two groups of symmetrically arranged tooth blocks are distributed on the outer periphery of the half gear, with a spacing between the two groups of tooth blocks.

[0009] As a further solution of the utility model: the feeding mechanism includes two vertical plates fixedly connected to the top of the support frame, a feeding roller that is rotatably connected between the two vertical plates and fits the outer wall of the welding wire, and a feeding motor connected to one of the feeding rollers is installed on the outer side of one of the vertical plates.

[0010] As a further solution of the utility model: a synchronous wheel is fixedly installed on the top of one of the driving wheels in each group, the two synchronous wheels are connected by a synchronous belt transmission, a driving motor is installed on the top of the support frame through a fixed frame, and the output end of the driving motor is connected to one of the synchronous wheels.

[0011] As a further solution of the utility model: a fan is installed on the top of the bracket, and the output end of the fan is connected to the inner cavity of the connecting cover through an air duct.

[0012] As a further solution of the utility model: a tungsten needle is installed inside the connecting cover, and the tungsten needle is connected to the positive pole of the electric welder through a wire. A negative terminal in contact with the surface of the steel pipe is installed on the bottom end plate of the support frame, and the negative terminal is connected to the negative pole of the electric welder.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. By setting up a reciprocating drive mechanism, the tungsten needle cooperates with the moving steel pipe to form a "Z"-shaped welding track, which has a larger welding area, better welding effect, and is not prone to cold welding problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 For the utility model Figure 1 A partial enlarged view of the middle part;

[0017] Figure 3 For the utility model Figure 1 A partial enlarged view of point B in the middle;

[0018] Figure 4 It is a cross-sectional view of the connection cover of the utility model.

[0019] In the figure: 1. support frame; 2. driving wheel; 3. synchronous wheel; 4. synchronous belt; 5. driving motor; 6. bracket; 7. fan-shaped groove; 8. fan; 9. air duct; 10. feeding tray; 11. welding wire; 12. connecting cover; 13. protruding ear; 14. rotating shaft; 15. connecting plate; 16. torsion spring; 17. rotating motor; 18. half gear; 19. feeding motor; 20. vertical plate; 21. feeding roller; 22. passive gear. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 to Figure 4 In the embodiment of the utility model, a welding device specially used for thin-walled welded steel pipes includes a support frame 1, the inner side of the support frame 1 is rotatably connected with two sets of driving wheels 2, the two sets of driving wheels 2 are connected by a transmission mechanism, a bracket 6 is welded on the top of the support frame 1, a fan-shaped groove 7 is opened on the top of the bracket 6 and runs through the bottom end of the bracket 6, a connecting cover 12 is movably connected to the inner wall of the fan-shaped groove 7, and a reciprocating driving mechanism for driving the connecting cover 12 to move along the inner wall of the fan-shaped groove 7 is installed on the top of the bracket 6; a feeding tray 10 is rotatably installed on the outer side of the vertical plate portion of the bracket 6, and an electric welding wire 11 is wound on the outer wall of the feeding tray 10, and a feeding mechanism for driving the electric welding wire 11 to perform wire feeding operation is installed on the top of the support frame 1.

[0022] In this embodiment, the metal sheet is rolled and formed during the conveying process, and there is a gap on the rolled and formed steel pipe. At this time, the gap needs to be welded to form a seamless thin-walled steel pipe.

[0023] During the welding process, the reciprocating drive mechanism drives the tungsten needle to swing back and forth, and cooperates with the transported steel pipe to be welded to form a "Z"-shaped welding track, which has a larger and more comprehensive welding area and a more reliable welding effect;

[0024] During the welding process, the welding current breaks through the air to form an arc, which melts the delivered welding wire 11 and fills the welding gap to form a solid welding point.

[0025] Please refer to Figure 2 The reciprocating drive mechanism includes a protruding ear 13 integrally formed on the outer wall of the connecting cover 12, one end of the protruding ear 13 is fixedly connected to a rotating shaft 14 rotatably connected to the bracket 6, the top of the rotating shaft 14 is interference-fitted with a passive gear 22, the bottom end of the rotating shaft 14 is integrally formed with a connecting disk 15, and a torsion spring 16 is engaged and connected between the top of the connecting disk 15 and the bottom end of the bracket 6; the outer periphery of the passive gear 22 is meshed with a half gear 18, and the bottom end of the bracket 6 is installed with a rotating motor 17 that drives the half gear 18 to rotate, and the outer periphery of the half gear 18 is distributed with two groups of symmetrically arranged tooth blocks, and there is a spacing between the two groups of tooth blocks.

[0026] In this embodiment: the rotating motor 17 is started, and the rotating motor 17 drives the half gear 18 to rotate. When the tooth block on the outer side of the half gear 18 meshes with the driven gear 22, the driven gear 22 is driven to rotate with the rotating shaft 14 as the axis. At this time, the driven gear 22 drives the protruding ear 13 to rotate through the rotating shaft 14, and the protruding ear 13 drives the connecting cover 12 to rotate, and the connecting cover 12 rotates along the fan-shaped groove 7. In this process, the connecting disk 15 rotates accordingly, and then the connecting disk 15 drives one end of the torsion spring 16 engaged therewith to twist accordingly, while the other end of the torsion spring 16 engaged with the bracket 6 remains stationary, and the torsion spring 16 is twisted at this time;

[0027] When the tooth block of the half gear 18 is separated from the driven gear 22, the torsion spring 16 is reset, and the torsion spring 16 drives the driven gear 22 to rotate and reset, so that the connecting cover 12 drives the tungsten needle connected inside it to swing back and forth, and cooperates with the moving steel pipe to form a "Z"-shaped welding action on the gap of the steel pipe.

[0028] Please refer to Figure 3 The feeding mechanism includes two vertical plates 20 fixedly connected to the top of the support frame 1, a feeding roller 21 that is rotatably connected between the two vertical plates 20 and fits the outer wall of the welding wire 11, and a feeding motor 19 connected to a feeding roller 21 is installed on the outer side of one vertical plate 20.

[0029] In this embodiment: by starting the feeding motor 19, the feeding motor 19 drives the feeding roller 21 connected thereto to rotate, and the feeding roller 21 rotates to drive the welding wire 11 to move and feed, while the other feeding roller 21 serves as a limiting support and reduces the resistance of the welding wire 11 during movement.

[0030] Please refer to Figure 1 A synchronous wheel 3 is fixedly installed on the top of a driving wheel 2 in each group, and the two synchronous wheels 3 are connected through a synchronous belt 4. A driving motor 5 is installed on the top of the support frame 1 through a fixed frame, and the output end of the driving motor 5 is connected to a synchronous wheel 3.

[0031] In this embodiment: by starting the driving motor 5, the driving motor 5 drives the synchronous wheel 3 connected thereto to rotate, and the synchronous wheel 3 drives another synchronous wheel 3 to rotate synchronously through the synchronous belt 4. The two synchronous synchronous wheels 3 with the same rotation direction synchronously drive the driving wheel 2 to rotate, and the rotating driving wheel 2 drives the thin-walled steel pipe to move.

[0032] Please refer to Figure 1 and Figure 4 A fan 8 is installed on the top of the bracket 6, and the output end of the fan 8 is connected to the inner cavity of the connecting cover 12 through the air duct 9.

[0033] In this embodiment: the input end of the fan 8 is connected to the high-pressure tank of the shielding gas through a connecting pipe, and the shielding gas enters the connecting cover 12 through the fan 8 and the air duct 9. The sprayed shielding gas squeezes out the external air around it, thereby avoiding oxidation and other problems during the welding process.

[0034] Please refer to Figure 1 and Figure 4 A tungsten needle is installed inside the connecting cover 12, and the tungsten needle is connected to the positive electrode of the electric welder through a wire. A negative terminal in contact with the surface of the steel pipe is installed on the bottom end plate of the support frame 1, and the negative terminal is connected to the negative electrode of the electric welder.

[0035] In this embodiment: the tungsten needle and the negative terminal are respectively connected to the electric welding machine and powered on, and the generated large current breaks through the air to form an arc, thereby achieving a welding effect;

[0036] The negative terminal is only in contact with the surface, which avoids the problem of the negative terminal moving with the steel pipe and enables continuous generation of the arc.

[0037] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welding device specially used for thin-walled welded steel pipes, comprising a support frame (1), the inner side of the support frame (1) is rotatably connected to two sets of drive wheels (2), the two sets of drive wheels (2) are connected via a transmission mechanism, and is characterized in that: A bracket (6) is welded to the top of the support frame (1); a fan-shaped groove (7) is formed on the top of the bracket (6) and extends to the bottom of the bracket (6); a connecting cover (12) is movably connected to the inner wall of the fan-shaped groove (7); and a reciprocating driving mechanism for driving the connecting cover (12) to move along the inner wall of the fan-shaped groove (7) is installed at the top of the bracket (6); A feeding tray (10) is rotatably mounted on the outer side of the vertical plate portion of the bracket (6), an electric welding wire (11) is wound around the outer wall of the feeding tray (10), and a feeding mechanism for driving the electric welding wire (11) to perform a wire feeding operation is mounted on the top end of the support frame (1).

2. A welding device specially used for thin-walled welded steel pipe according to claim 1, characterized in that: The reciprocating drive mechanism comprises a protruding ear (13) integrally formed on the outer wall of the connecting cover (12), one end of the protruding ear (13) is fixedly connected to a rotating shaft (14) rotatably connected to the bracket (6), the top of the rotating shaft (14) is interference fitted with a passive gear (22), the bottom end of the rotating shaft (14) is integrally formed with a connecting disk (15), and a torsion spring (16) is engaged and connected between the top end of the connecting disk (15) and the bottom end of the bracket (6); A half gear (18) is meshed with the outer periphery of the passive gear (22), a rotary motor (17) for driving the half gear (18) to rotate is installed at the bottom end of the bracket (6), and two groups of symmetrically arranged tooth blocks are distributed on the outer periphery of the half gear (18), with a spacing between the two groups of tooth blocks.

3. A welding device specially used for thin-walled welded steel pipe according to claim 1, characterized in that: The feeding mechanism comprises two vertical plates (20) fixedly connected to the top of the support frame (1), a feeding roller (21) that is rotatably connected between the two vertical plates (20) and is in contact with the outer wall of the welding wire (11), and a feeding motor (19) connected to one of the feeding rollers (21) is installed on the outer side of one of the vertical plates (20).

4. A welding device specially used for thin-walled welded steel pipe according to claim 1, characterized in that: A synchronous wheel (3) is fixedly mounted on the top of one of the driving wheels (2) in each group, and the two synchronous wheels (3) are connected by a synchronous belt (4). A driving motor (5) is mounted on the top of the support frame (1) via a fixed frame, and the output end of the driving motor (5) is connected to one of the synchronous wheels (3).

5. A welding device specially used for thin-walled welded steel pipe according to claim 2, characterized in that: A fan (8) is installed on the top of the bracket (6), and the output end of the fan (8) is connected to the inner cavity of the connection cover (12) through an air duct (9).

6. A welding device specially used for thin-walled welded steel pipe according to claim 1, characterized in that: A tungsten needle is installed inside the connection cover (12), and the tungsten needle is connected to the positive electrode of the electric welder through a wire. A negative terminal in contact with the surface of the steel pipe is installed on the bottom end plate of the support frame (1), and the negative terminal is connected to the negative electrode of the electric welder.

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