阅读说明：本技术 管道焊接方法及焊接小车 (Pipeline welding method and welding trolley ) 是由 王喜春 吴海音 孙成成 于 2021-06-25 设计创作，主要内容包括：本发明公开了一种管道焊接方法及焊接小车,焊接小车包括行走装置,所述行走装置设有伸出的焊接臂,焊枪连接于所述焊接臂,焊接时,焊枪的焊接倾角α能够在预设的焊接范围内均匀变化。采用本发明的焊接方法以及能够以该方法焊接的焊接小车,通过给焊枪增设旋转机构,使焊枪自动转动以改变焊接倾角,对于多种焊接工艺可实现自动化的焊接倾角控制,提高焊接质量。(The invention discloses a pipeline welding method and a welding trolley, wherein the welding trolley comprises a walking device, the walking device is provided with a welding arm which extends out, a welding gun is connected with the welding arm, and a welding inclination angle alpha of the welding gun can be uniformly changed within a preset welding range during welding. By adopting the welding method and the welding trolley which can be welded by the method, the welding gun is automatically rotated to change the welding inclination angle by adding the rotating mechanism to the welding gun, so that the automatic welding inclination angle control can be realized for various welding processes, and the welding quality is improved.)

1. The pipeline welding method is characterized in that the pipeline is automatically welded through a welding trolley, and comprises the following steps: during welding, the welding inclination angle alpha of the welding gun (1) can be uniformly changed in a preset welding range (X).

2. The pipe welding method according to claim 1, wherein: the welding range is the walking range of the welding tractor, and when the pipeline is welded, the welding range is an angle range which is a value capable of being set at will.

3. The pipe welding method according to claim 1, wherein: the uniform change is from a first inclination angle alpha 1 to a second inclination angle alpha 2 in the welding range, and the first inclination angle alpha 1 and the second inclination angle alpha 2 are values which can be set randomly.

4. The utility model provides a welding carriage, includes running gear (2), its characterized in that: the walking device is provided with a protruding welding arm (21), a welding gun (1) is connected to the welding arm, and the welding gun can automatically rotate to change the angle of a welding inclination angle alpha during welding.

5. The welding carriage as recited in claim 4, further comprising: the welding gun is connected to the welding arm through a rotating mechanism (3), and the rotating mechanism is provided with a servo motor (31) for driving the rotating mechanism to rotate.

6. The welding carriage as recited in claim 5, further comprising: the rotary mechanism comprises a rotary seat (32) and a rotary disc (33), the rotary seat is provided with a containing cavity (321) for the rotary disc to be placed in, the rotary disc is rotatably connected in the containing cavity, the servo motor is installed on the rotary seat and is driven by a worm gear or a gear to rotate the rotary disc.

7. The welding carriage as recited in claim 5, further comprising: and the rotation axis defining the welding inclination angle alpha is an X axis, and the welding trolley is also provided with a driving device for driving the welding arm to reciprocate along the X axis.

8. The welding carriage as recited in claim 5, further comprising: the welding gun is arranged on the rotating mechanism through a straight line module (4), and the welding gun can slide along the straight line module, so that the welding gun can be close to or far away from a welded pipeline.

Technical Field

The invention belongs to the technical field of welding equipment, and particularly relates to a pipeline welding method and a pipeline welding trolley.

Background

The full-position automatic welding machine (welding trolley) can realize full-position welding of flat welding, vertical welding, transverse welding and overhead welding and full-position welding of large pipelines.

In an actual welding process, requirements for welding inclination angles of welding guns are different under different conditions of different welding positions, different welding processes, different welding materials, different pipes and the like, the existing welding trolleys are welded by adjusting the inclination angles before welding, the welding process cannot be changed, if the welding trolleys need to be changed, the welding is stopped firstly, the welding can be continued only after the inclination angles of the welding guns are adjusted, a section of welding seam is provided with a plurality of joints, welding defects are easy to generate, and the appearance is not attractive. If the inclination angle of the welding gun is not changed, unmelted slag or slag inclusion is easy to cause, and the welding quality is reduced.

Disclosure of Invention

The invention mainly solves the technical problem of providing a pipeline welding method and a welding trolley, which can realize automatic welding inclination angle control for various welding processes and improve the welding quality.

In order to solve the above technical problems, one technical solution adopted by the present invention is as follows:

a pipeline welding method is characterized in that automatic welding is carried out through a welding trolley, and a welding inclination angle alpha of a welding gun can be uniformly changed within a preset welding range during welding.

Further, the welding range is the walking range of the welding trolley, and when the pipeline is welded, the welding range is an angle range which is a value that can be set arbitrarily according to the requirements of process procedures.

In addition, the uniform change is a uniform change from a first inclination angle α 1 to a second inclination angle α 2 within the welding range, and both the first inclination angle α 1 and the second inclination angle α 2 are arbitrarily settable values.

In order to solve the technical problem, the invention further provides a welding trolley which comprises a walking device, wherein the walking device is provided with a welding arm extending out, a welding gun is connected to the welding arm, and the welding gun can automatically rotate to change the angle of the welding inclination angle alpha during welding.

Further, the welding gun is connected to the welding arm through a rotating mechanism, and the rotating mechanism is provided with a servo motor for driving the rotating mechanism to rotate.

Furthermore, rotary mechanism includes roating seat and carousel, the roating seat has the appearance the chamber that holds that the carousel put into, the carousel rotate connect in hold the intracavity, servo motor install in the roating seat, and through turbine worm or gear drive the carousel is rotatory.

Furthermore, a rotation axis defining the welding inclination angle alpha is an X axis, and the welding trolley is further provided with a driving device for driving the welding arm to reciprocate along the X axis.

Further, the welding gun is mounted on the rotating mechanism through a linear module, and the welding gun can slide along the linear module, so that the welding gun can approach or leave a welded pipeline.

The invention has the beneficial effects that:

by adopting the welding method and the welding trolley which can be welded by the method, the welding gun is automatically rotated to change the welding inclination angle by adding the rotating mechanism to the welding gun, so that the automatic welding inclination angle control can be realized for various welding processes, and the welding quality is improved.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIG. 1 is a schematic view of the position of a welding torch in the pipe welding method of the present invention;

FIG. 2 is a schematic view illustrating a moving process of a welding torch in the pipe welding method according to the present invention;

FIG. 3 is a schematic view of the overall construction of the welding carriage of the present invention (when installed in a pipeline);

FIG. 4 is a schematic view of the welding carriage of the present invention;

FIG. 5 is a schematic view of the structure of the rotating mechanism of the present invention;

FIG. 6 is a schematic view showing the internal structure of the walking device of the present invention;

FIG. 7 is a schematic view of the welding gun of the present invention mounted on a linear module;

the parts in the drawings are marked as follows:

the welding gun comprises a welding gun 1, a walking device 2 and a welding arm 21;

the rotary mechanism 3, the servo motor 31, the rotary seat 32, the accommodating cavity 321, the worm and gear mechanism 322 and the turntable 33;

the linear module 4, the track 5, the sliding table 61, the sliding rail 62, the screw rod mechanism 63 and the pipeline 9.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

Example (b):

a pipeline welding method which is automatically welded by a welding trolley, as shown in figure 1: during welding, the welding inclination angle α (also referred to as a welding gun inclination angle) of the welding gun 1 can be uniformly changed (changed at a constant speed) within a preset welding range X, wherein the welding range can be any value, and the welding inclination angle refers to an angle between the welding gun and a normal line passing through a welding point, which is also well understood.

In addition, the welding range described here is a traveling range of the welding carriage, and this range may be a part or all of the welding stroke (which needs to be set in advance), and in the case of pipe welding, the welding range is an angle range, and in the case of plane running welding, the welding range is a length range, and both the angle range and the length range are values that can be set arbitrarily.

The uniform change is that the uniform change is from a first inclination angle alpha 1 to a second inclination angle alpha 2 in the welding range, and the first inclination angle alpha 1 and the second inclination angle alpha 2 are values which can be set randomly;

as shown in fig. 2: for example, in the case of root welding (first pass welding backing), the welding gun is in the welding direction from top to bottom, and the process is performed in a straight welding position (defined as 0 °), in a forward tilting manner by about 15 ° to a middle transverse welding position (90 °), in a forward tilting manner by about 5 ° to an upward tilting position (180 °), in a backward tilting manner by about 10 °, wherein in the course of the above-mentioned several processes, the welding gun angle is within a set section (i.e., within the welding range), and is uniformly changed to a set degree.

It should be noted that the forward and backward inclinations described herein are defined relative to the direction of movement of the welding torch, so that when the welding torch is tilted forward by 15 °, i.e., the welding inclination α is 15 °, when the welding inclination α is 5 ° in the transverse welding position, i.e., the first inclination α 1 is 15 °, and the second inclination α 2 is 5 °, the inclination variation angle range of the welding torch within the welding range X (0 ° to 90 °) is 10 °, and particularly, when welding, the inclination variation angle range of the welding torch is uniformly changed linearly from 15 ° to 5 ° within 90 °;

in addition, in the overhead welding position, the welding gun is tilted backwards, although the inclination angle is 10 degrees at this time, the direction is reversed relative to 5 degrees of the former endpoint (transverse welding position), and the angle difference between the two is 15 degrees, so that the inclination angle of the welding gun is 15 degrees within the welding range X (90-180 degrees);

the welding quality can be improved through the (variable) gradually changed welding inclination angle, so that the surplus height of the welding line is small, and the welding line is well formed.

For another example, with flux cored wire, the torch needs to be perpendicular to the surface (coinciding with the weld found, i.e., at an angle of 0 °) in an overhead welding position when the torch is traveling in an upward direction, and needs to be tilted back by about 5 ° in a middle lateral welding position to an upper flat welding position, where the torch needs to be tilted forward by about 5 ° to prevent forward gushing of the molten pool and resulting unmelted weld, where forward and backward tilting are also defined with reference to the direction of travel of the torch.

Of course, the present embodiment only exemplifies two embodiments, and there are more inclination angle requirement scenarios in practical application, such as different welding seams, different pipe materials, and the like, for the requirements of different welding positions (root welding) and angles in welding processes (welding wires, welding directions, and the like), which are all the same welding methods.

In order to better realize the welding method, the invention also provides a welding trolley, which is shown in figures 3 and 4: the welding device comprises a traveling device 2, wherein the traveling device is installed on a track 5 to operate, the traveling device is provided with a protruding welding arm 21, a welding gun 1 is connected to the welding arm, and the welding gun can automatically rotate to change the angle of a welding inclination angle alpha during welding.

The welding gun is connected to the welding arm through a rotating mechanism 3, and the rotating mechanism is provided with a servo motor 31 for driving the rotating mechanism to rotate.

In the present embodiment, as shown in fig. 4 and 5: rotary mechanism includes roating seat 32 and carousel 33, the roating seat has the appearance the chamber 321 that holds that the carousel put into, the carousel rotate connect in hold the intracavity, servo motor install in the roating seat, and through turbine worm or gear drive the carousel is rotatory, in this embodiment, servo motor passes through the transmission of turbine worm mechanism 322.

In addition, taking the rotation axis of the welding inclination angle α as the X axis as a reference, the welding carriage is further provided with a driving device for driving the welding arm to reciprocate along the X axis, and this embodiment is shown in fig. 6: one end of the welding arm is connected with the rotating mechanism, the other end of the welding arm is fixedly connected with a sliding table 61, the sliding table linearly reciprocates along a sliding rail 62, and the sliding table is driven by a servo motor and a screw rod mechanism 63.

According to the welding trolley, the welding gun can rotate and linearly move in the horizontal direction, and can also linearly move in the normal direction of the pipeline, and specifically, as shown in fig. 7: the welding gun is arranged on the rotating mechanism through a linear module 4, and the welding gun can slide along the linear module, so that the welding gun can be close to or far away from a welded pipeline 9.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.