CN105479027A - Automatic welding device for car radiator pipeline and working method of automatic welding device - Google Patents

Abstract

The invention relates to an automatic welding device for automobile radiator pipelines and a working method thereof, comprising an equipment cabinet and a working mechanism, the working mechanism including a column installed on the equipment cabinet, a work table and a rotating table; a rocker arm is installed on the column Ⅰ and rocker arm Ⅱ; four stations are evenly installed along the circumferential direction on the rotary table, and the four stations are the loading and unloading station, the first welding station, the second welding station and the cooling station. The arm I and the rocker arm II are respectively located above the first welding station and the second welding station. The invention has the advantages of high degree of automation, convenient operation, etc., and can meet the welding requirements of automobile heat dissipation pipes of various specifications through its own adjustment. The working environment reduces the labor intensity.

Description

An automatic welding device for automobile radiator pipeline and its working method

technical field

The invention relates to the field of welding equipment, in particular to an automatic welding device for automobile radiator pipelines and a working method thereof.

Background technique

In China, the welding of automobile radiator pipelines still stays in the process of manual flame brazing. The process flow is: after the radiator and heat pipe are assembled, manual flame brazing, cooling after welding, etc. The fitter assembles the heat dissipation pipe on the radiator, and the parts are clamped on the tooling. The welder holds the welding torch in one hand and the welding wire in the other hand, and reciprocates to heat the parts evenly. The welder judges the surface temperature of the parts based on experience, and then adds solder and flux. The welder has been observing the welded parts in this project. The labor intensity is very high, and the concentration is high, which is easy to cause fatigue and injury to the eyes, and the flame heating temperature is not easy to control. Often results in parts overheating. This method requires two people to cooperate with the operation, and can only complete single-piece production each time. The labor intensity is high, and the production efficiency is low. The welder's long-term observation of the flame is likely to cause damage to the welder's eyes, and the quality is difficult to guarantee.

Nowadays, manual brazing has become a bottleneck problem in the production process, which puts a lot of pressure on the production leaders. The existing technology has the following defects and deficiencies:

(1) Manual single-piece production requires a lot of labor intensity for the welders. During the welding process, the welders keep observing the parts and flames, which may easily cause fatigue and injury to the welders' eyes.

(2) In the welding process, the temperature difference between the aluminum brazing temperature and the melting temperature is small, about 50°C, the welder's attention is highly concentrated, the welder's skills are high, and it is easy to cause defects such as overheating.

Contents of the invention

In view of the defects of the above-mentioned technologies, the present invention proposes an automatic welding device and working method for automobile radiator pipelines that can realize automatic welding of automobile radiator pipelines, improve the working environment of workers, and improve welding quality and efficiency.

An automatic welding device for automobile radiator pipelines, comprising an equipment cabinet and a working mechanism installed on the equipment cabinet, the outside of the working mechanism is provided with an equipment cover connected with the equipment cabinet, and the working mechanism includes a The column, worktable and rotary table on the equipment cabinet, the column is located in the middle of the worktable, so that the overall structure is compact; the column is installed with rocker arm I and rocker II that can rotate around the column, so that the rocker arm I and rocker Arm II can be directly facing the welding spot of the pipeline to be welded, which increases the flexibility of the device; four stations are uniformly installed along the circumferential direction on the rotary table, and the four stations are respectively loading and unloading stations , the first welding station, the second welding station and the cooling station, the rocker arm I and the rocker arm II are respectively located above the first welding station and the second welding station. The invention realizes the position change of four stations through the rotation of the rotary table, which is helpful to realize the mass production and processing of automobile radiator pipelines. After the station change, the rocker arm I and rocker arm II can be used The welding process replaces the traditional manual welding, realizes automation, improves safety and ensures the quality of welding.

The rocker arm I includes a first horizontal movement mechanism, a first vertical movement mechanism and a connecting plate I, and the first vertical movement mechanism is mounted on the first horizontal movement mechanism through the connecting plate I.

The first horizontal movement mechanism includes a guide rail I and a slide block I, the slide block I is slidably matched with the guide rail I, and the connecting plate I is installed on the slide block I. For automobile radiator pipelines of different specifications, the horizontal position adjustment can be performed by the first horizontal moving mechanism.

The first vertical movement mechanism includes a linear module I, a motor I, a motor II, a coupling I, a mounting plate I, a transmission shaft I, a welding torch fixing plate I and a welding torch I, and the linear module I is installed on the connection On the board I, the motor I is installed vertically on the upper end of the linear module I, the installation board I is installed on the linear module I, the motor II is vertically installed on the upper end of the installation board I, and the transmission shaft The upper end of I is connected to the motor II through coupling I, the middle part of the transmission shaft I is connected to the mounting plate I through bearings, the welding torch fixing plate I is fixed on the lower end of the transmission shaft I, and the welding torch I is installed on the welding torch fixed Lower end of plate I. The linear module Ⅰ is driven by the motor Ⅰ, so as to realize the up and down movement of the mounting plate Ⅰ, and drive the welding gun Ⅰ to move up and down synchronously; the drive shaft Ⅰ is driven by the motor Ⅱ to rotate, so as to synchronously drive the welding gun Ⅰ to rotate, so as to ensure the welding quality.

The rocker arm II includes a second horizontal movement mechanism, a second vertical movement mechanism and a connection plate II, and the second vertical movement mechanism is mounted on the second horizontal movement mechanism through the connection plate II.

The second horizontal movement mechanism includes a guide rail II and a slider II, the slider II is slidingly matched with the guide rail II, and the connecting plate II is installed on the slider II. Similarly, for automobile radiator pipes of different specifications, the horizontal position can be adjusted through the second horizontal movement mechanism.

The second vertical movement mechanism includes a linear module II, a motor III, a motor IV, a shaft coupling II, a mounting plate II, a transmission shaft II, a welding fixing plate II and a welding torch II, and the linear module II is installed on the connection On the board II, the motor III is installed vertically on the upper end of the linear module II, the installation board II is installed on the lower part of the linear module II, the motor IV is vertically installed on the upper end of the installation board II, and the transmission shaft The upper end of II is connected to the motor IV through coupling II, the middle part of the transmission shaft II is connected to the mounting plate II through a bearing, the welding fixing plate II is fixed on the lower end of the transmission shaft II and connected, and the welding torch II is installed on the welding Fix the lower end of the plate II. The linear module II is driven by the motor III, so that the mounting plate II moves up and down, and the welding gun II moves up and down synchronously; the motor IV is started, and the power is transmitted through the transmission shaft II, so that the welding gun II rotates to ensure the welding quality.

A working method for an automatic welding device for automobile radiator pipelines, the steps of the method are as follows:

Step 1: First install the pipeline to be welded at the loading and unloading station, and determine the two welding positions of the pipeline;

Step 2: Rotate rocker arm Ⅰ and rocker arm Ⅱ so that rocker arm Ⅰ and rocker arm Ⅱ are located above the first welding station and the second welding station and locked;

Step 3: Adjust the position of welding gun I and welding gun II through the first horizontal moving mechanism and the second horizontal moving mechanism, so that welding gun I and welding gun II are located directly above the pipeline to be welded and lock the first horizontal moving mechanism and the second horizontal moving mechanism;

Step 4: Rotate the motor Ⅰ to return the welding torch Ⅰ to the initial position, and the position adjustment work is completed;

Step 5: Start the equipment, the rotary table rotates 90 degrees, the pipeline to be welded reaches the first welding station, the motor I starts, the first vertical moving mechanism moves the welding torch I downward, and the welding torch I reaches the welding position to start welding, the welding process The middle motor II is started to make the welding torch I rotate slowly. After the welding of the first point of the welding pipeline is completed, the motor I reverses and the welding torch I returns to the initial position;

Step 6: The rotary table rotates 90 degrees, the pipeline to be welded arrives at the second welding station, the motor Ⅲ starts, the second vertical moving mechanism makes the welding torch II move downward, and the welding torch II reaches the welding position to start welding. During the welding process, the motor Ⅳ Start to make the welding torch II rotate slowly. After the welding of the second point of the welding pipeline is completed, the motor III reverses to make the welding torch II return to the initial position. At the same time, the worker has installed the second pipeline to be welded at the loading and unloading station;

Step 7: The rotary table rotates 90 degrees, the first pipeline to be welded goes to the cooling station, the second pipeline to be welded goes to the second welding station, and steps 5 and 6 are repeated;

Step 8: The rotary table rotates 90 degrees, the worker removes the welded pipeline, and installs the new pipeline to be welded at the loading and unloading station;

Step 9: Repeat steps 5 to 8 to realize batch welding processing.

The present invention requires that before the production of the equipment, first install the pipeline to be welded, and make the welding gun I and the welding gun II face the two welding points of the pipeline to be welded by adjusting the rocker arm I and the rocker arm II and lock the rocker arm I and the rocker arm II. The first vertical moving mechanism and the second vertical moving mechanism bring welding torch I and welding torch II back to the initial height, start the equipment, and rotate the rotary table to realize fully automatic welding. When the specifications of the pipeline to be welded change, the first horizontal movement mechanism, the first vertical movement mechanism, the second horizontal movement mechanism, and the second vertical movement mechanism are required to readjust the positions of welding torch I and welding torch II.

The beneficial effects of the present invention are: the present invention has the advantages of high degree of automation, convenient operation, etc., and can satisfy the welding of automobile cooling pipes of various specifications through its own adjustment, has wide application, high flexibility, and the welding quality and efficiency are significantly improved. Improve, but also improve the working environment of workers, reduce labor intensity.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is the structural representation after removing equipment cover of the present invention;

Fig. 3 is the structural representation of working mechanism of the present invention;

Fig. 4 is the structural representation of rocker arm I of the present invention;

Fig. 5 is the structural representation of rocker arm II of the present invention;

detailed description

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further elaborated below.

As shown in Figures 1 to 5, an automatic welding device for automobile radiator pipelines includes an equipment cabinet 3 and a working mechanism installed on the equipment cabinet 3, and the outside of the working mechanism is provided with the equipment cabinet 3 Connected equipment cover 1, the working mechanism includes a column 9 installed on the equipment cabinet 3, a work surface 2 and a rotary table 4, the column 9 is located in the middle of the work surface 2, so that the overall structure is compact; the column 9 is installed with The rocker arm I10 and the rocker arm II11 that can rotate around the column 9, so that the rocker arm I10 and the rocker arm II11 can face the welding spot of the pipeline to be welded, which increases the flexibility of the device; There are four stations installed in a uniform direction, the four stations are respectively the loading and unloading station 5, the first welding station 6, the second welding station 7 and the cooling station 8, the rocker arm I10, rocker The arm II11 is located above the first welding station 6 and the second welding station 7 respectively. The present invention realizes the position transformation of the four stations through the rotation of the rotary table 4, which is helpful to realize the batch production and processing of the automobile radiator pipeline. After the station transformation, the rocker arm I10 and the rocker arm II11 can be used Realize the welding process, replace the traditional manual welding, realize automation, improve safety, and ensure the quality of welding.

The swing arm I10 includes a first horizontal movement mechanism, a first vertical movement mechanism and a connection plate I14, and the first vertical movement mechanism is mounted on the first horizontal movement mechanism through the connection plate I14. Before welding, the position of the first horizontal moving mechanism needs to be adjusted to ensure that other components installed on the rocker arm I10 are facing the first welding point of the pipeline to be welded on the first welding station 6 .

The first horizontal movement mechanism includes a guide rail I12 and a slider I13, the slider I13 is slidingly matched with the guide rail I12, and the connecting plate I14 is installed on the slider I13. For automobile radiator pipelines of different specifications, the horizontal position adjustment can be performed by the first horizontal moving mechanism.

The first vertical movement mechanism includes a linear module I15, a motor I16, a motor II17, a coupling I18, a mounting plate I19, a transmission shaft I20, a welding torch fixing plate I21 and a welding torch I22, and the linear module I15 is installed on the connection On the board I14, the motor I16 is installed vertically on the upper end of the linear module I15, the installation board I19 is installed on the linear module I15, the motor II17 is vertically installed on the upper end of the installation board I19, and the transmission shaft The upper end of I20 is connected with the motor II17 through the coupling I18, the middle part of the transmission shaft I20 is connected with the mounting plate I19 through a bearing, the welding torch fixing plate I21 is fixed on the lower end of the transmission shaft I20, and the welding torch I22 is installed on the welding torch fixed The lower end of the plate I21. The linear module I15 is driven by the motor I16, so as to realize the up and down movement of the mounting plate I19 and drive the welding torch I22 to move up and down synchronously; the drive shaft I20 is driven to rotate by the motor II17 to synchronously drive the welding torch I22 to rotate, thereby ensuring the quality of welding.

The rocker arm II11 includes a second horizontal movement mechanism, a second vertical movement mechanism and a connection plate II25, and the second vertical movement mechanism is mounted on the second horizontal movement mechanism through the connection plate II25.

The second horizontal movement mechanism includes a guide rail II23 and a slider II24, the slider II24 is slidingly matched with the guide rail II23, and the connecting plate II25 is installed on the slider II24. Similarly, for automobile radiator pipes of different specifications, the horizontal position can be adjusted through the second horizontal movement mechanism.

The second vertical moving mechanism includes a linear module II26, a motor III27, a motor IV28, a coupling II29, a mounting plate II30, a transmission shaft II31, a welding fixing plate II32 and a welding torch II33. The linear module II26 is installed on the connection On the board II25, the motor III27 is installed vertically on the upper end of the linear module II26, the installation board II30 is installed on the lower part of the linear module II26, the motor IV28 is vertically installed on the upper end of the installation board II30, and the transmission shaft The upper end of II31 is connected to the motor IV28 through coupling II29, the middle part of the transmission shaft II31 is connected to the installation plate II30 through a bearing, the welding fixing plate II32 is fixed to the lower end of the transmission shaft II31 and connected, and the welding torch II33 is installed on the welding The lower end of the fixed plate II32. The linear module II26 is driven by the motor III27, so that the mounting plate II30 moves up and down, and the welding gun II33 moves up and down synchronously; the motor IV28 is started, and the power is transmitted through the transmission shaft II31, so that the welding gun II33 rotates to ensure the welding quality.

A working method for an automatic welding device for automobile radiator pipelines, the steps of the method are as follows:

Step 1: Install the pipeline to be welded at the loading and unloading station 5, and determine the two welding positions of the pipeline;

Step 2: Rotate the rocker arm I10 and the rocker arm II11 so that the rocker arm I10 and the rocker arm II11 are located above the first welding station 6 and the second welding station 7 and locked;

Step 3: Adjust the positions of welding gun I22 and welding gun II33 through the first horizontal moving mechanism and the second horizontal moving mechanism, so that welding gun I22 and welding gun II33 are located directly above the pipeline to be welded and lock the first horizontal moving mechanism and the second horizontal moving mechanism;

Step 4: The motor I16 rotates to return the welding torch I22 to the initial position, and the position adjustment work is completed;

Step 5: Start the equipment, rotate the rotary table 4 by 90 degrees, the pipeline to be welded reaches the first welding station 6, the motor I16 is started, the first vertical moving mechanism moves the welding torch I22 downward, and the welding torch I22 reaches the welding position to start welding. During the welding process, the motor II is started to make the welding torch I22 rotate slowly. After the welding of the first point of the welding pipeline is completed, the motor I16 is reversed to make the welding torch I22 return to the initial position;

Step 6: The rotary table 4 rotates 90 degrees, the pipeline to be welded arrives at the second welding station 7, the motor Ⅲ27 starts, the second vertical moving mechanism moves the welding torch Ⅱ33 downward, and the welding torch Ⅱ33 reaches the welding position to start welding. During the welding process Motor IV is started to make welding torch II33 rotate slowly. After the welding of the second point of the pipeline to be welded is completed, motor III27 reverses to make welding torch II33 return to the initial position. At the same time, the worker has installed the second pipeline to be welded at loading and unloading station 5 ;

Step 7: The rotary table 4 rotates 90 degrees, the first pipeline to be welded goes to the cooling station 8, the second pipeline to be welded goes to the second welding station 7, and steps 5 and 6 are repeated;

Step 8: The rotary table 4 rotates 90 degrees, the worker removes the welded pipeline, and installs the new pipeline to be welded at the loading and unloading station 5 at the same time;

Step 9: Repeat steps 5 to 8 to realize batch welding processing.

The present invention requires that the pipeline to be welded be installed first before the production of the equipment, and the welding torch I22 and the welding torch II33 are facing the two welding points of the pipeline to be welded by adjusting the rocker arm I10 and the rocker II11 and locking the rocker arm I10 and the rocker arm II11. The first vertical moving mechanism and the second vertical moving mechanism make the welding torch I22 and welding torch II33 return to the initial height, start the equipment, and the rotary table 4 rotates to realize fully automatic welding. When the specifications of the pipeline to be welded change, the positions of welding torch I22 and welding torch II33 need to be readjusted through the first horizontal movement mechanism, the first vertical movement mechanism, the second horizontal movement mechanism, and the second vertical movement mechanism.

Taking welding 50 automobile cooling pipes of the same specification as an example, the specific working process of the present invention can be divided into the following steps:

1) Find out the welding position before the welding work, and install the first pipeline to be welded on the loading and unloading station 5;

2) Rotate the rocker arm I10, adjust the first horizontal movement mechanism installed on the rocker arm I10, make the welding torch I22 face the first welding point of the pipeline to be welded, lock the rocker arm I10 and the first horizontal movement installed on the rocker arm I10 mechanism, so that the first vertical moving mechanism installed on the rocker arm I10 moves upward, and the welding torch I22 returns to the initial position;

3) Rotate the rocker arm II11, adjust the second horizontal movement mechanism installed on the rocker arm II11, make the welding torch II33 face the second welding point of the pipeline to be welded, lock the rocker arm II11 and the second horizontal movement installed on the rocker arm II11 mechanism, so that the second vertical moving machine installed on the rocker arm II11 moves upward, and the welding torch II33 returns to the initial position;

4) Start the equipment, the rotary table 4 rotates 90 degrees, the first pipeline to be welded arrives at the first welding station 6, the motor I16 starts, the first vertical moving mechanism moves the welding torch I22 downward, and the welding torch I22 reaches the welding position and starts Welding, during the welding process, the motor II17 is started to make the welding torch I22 rotate slowly. After the welding of the first point of the welding pipeline is completed, the motor I16 is reversed, so that the welding torch I22 returns to the initial position;

5) The rotary table 4 rotates 90 degrees, the pipeline to be welded arrives at the second welding station 7, the motor III27 is started, the second vertical moving mechanism moves the welding torch II33 downward, and the welding torch II33 reaches the welding position to start welding. During the welding process, the motor Ⅳ28 is started to make the welding torch II33 rotate slowly. After the welding of the second point of the pipeline to be welded is completed, the motor III27 reverses to make the welding torch II33 return to the initial position. At the same time, the worker has installed the second pipeline to be welded at the loading and unloading station 5;

6) The rotary table 4 rotates 90 degrees, the pipeline to be welded reaches the second welding station 7, the motor III27 is started, the second vertical moving mechanism moves the welding torch II33 downward, and the welding torch II33 reaches the welding position to start welding. During the welding process, the motor Ⅳ28 is started to make the welding torch II33 rotate slowly. After the welding of the second point of the pipeline to be welded is completed, the motor III27 reverses to make the welding torch II33 return to the initial position. At the same time, the worker has installed the second pipeline to be welded at the loading and unloading station 5;

7) The rotary table 4 rotates 90 degrees, the first pipeline to be welded goes to the cooling station, the second pipeline to be welded goes to the second welding station, and steps 5 and 6 are repeated;

8) The rotary table 4 rotates 90 degrees, the worker removes the welded pipeline, and installs the pipeline to be welded to the loading and unloading station 5 at the same time;

9) Repeat step (4) to step (8). If you replace the pipeline with another specification for welding, you need to repeat step (1) to step (8).

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and what are described in the above-mentioned embodiments and description are only the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention also has various Variations and improvements all fall within the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. An automatic welding device for automobile radiator pipelines, comprising an equipment cabinet (3) and a working mechanism installed on the equipment cabinet (3), the outer sleeve of the working mechanism is provided with the equipment cabinet (3) to be connected The equipment cover (1) is characterized in that: the working mechanism includes a column (9) installed on the equipment cabinet (3), a work surface (2) and a rotary table (4), and the column (9) is located on the work surface ( 2) in the middle; the column (9) is equipped with a rocker arm I (10) and a rocker arm II (11) that can rotate around the column (9); Four stations are installed, and the four stations are respectively the loading and unloading station (5), the first welding station (6), the second welding station (7) and the cooling station (8). The rocker arm I (10) and the rocker arm II (11) are respectively located above the first welding station (6) and the second welding station (7). 2. An automatic welding device for automobile radiator pipelines according to claim 1, characterized in that: said rocker arm I (10) includes a first horizontal movement mechanism, a first vertical movement mechanism and a connecting plate I (14), the first vertical movement mechanism is installed on the first horizontal movement mechanism through the connecting plate I (14); The first horizontal movement mechanism includes a guide rail I (12) and a slider I (13), the slider I (13) is slidingly matched with the guide rail I (12), and the connecting plate I (14) is installed on the slider Ⅰ(13) on; The first vertical movement mechanism includes linear module I (15), motor I (16), motor II (17), coupling I (18), mounting plate I (19), transmission shaft I (20) , welding torch fixing plate I (21) and welding torch I (22), the linear module I (15) is installed on the connecting plate I (14), and the motor I (16) is vertically installed on the linear module I ( 15), the installation plate I (19) is installed on the linear module I (15), the motor II (17) is vertically installed on the upper end of the installation plate I (19), and the transmission shaft I ( The upper end of 20) is connected with the motor II (17) through the coupling I (18), the middle part of the transmission shaft I (20) is connected with the mounting plate I (19) through a bearing, and the welding torch fixing plate I (21) It is fixed on the lower end of the transmission shaft I (20), and the welding gun I (22) is installed on the lower end of the welding gun fixing plate I (21). 3. An automatic welding device for automobile radiator pipelines according to claim 1, characterized in that: said rocker arm II (11) includes a second horizontal movement mechanism, a second vertical movement mechanism and a connecting plate II (25), the second vertical movement mechanism is installed on the second horizontal movement mechanism through the connecting plate II (25); The second horizontal movement mechanism includes a guide rail II (23), a slider II (24), the slider II (24) is slidingly matched with the guide rail II (23), and the connecting plate II (25) is installed on the slider Ⅱ(24) on; The second vertical movement mechanism includes linear module II (26), motor III (27), motor IV (28), shaft coupling II (29), mounting plate II (30), transmission shaft II (31) , welding fixed plate II (32) and welding torch II (33), the linear module II (26) is installed on the connecting plate II (25), and the motor III (27) is vertically installed on the linear module II ( 26), the installation plate II (30) is installed on the lower part of the linear module II (26), the motor IV (28) is vertically installed on the upper end of the installation plate II (30), and the transmission shaft II ( The upper end of 31) is connected with the motor IV (28) through the shaft coupling II (29), the middle part of the transmission shaft II (31) is connected with the installation plate II (30) through the bearing, and the welding fixed plate II (32) It is fixed on the lower end of the transmission shaft II (31), and the welding torch II (33) is installed on the lower end of the welding fixed plate II (32). 4. A working method for an automatic welding device for automobile radiator pipelines, characterized in that: the method steps are as follows: Step 1: Install the pipeline to be welded at the loading and unloading station (5), and determine the two welding positions of the pipeline; Step 2: Rotate rocker arm I (10) and rocker arm II (11), so that rocker arm I (10) and rocker arm II (11) are located at the first welding station (6) and the second welding station (7) above and locked; Step 3: Adjust the position of welding torch I (22) and welding torch II (33) through the first horizontal movement mechanism and the second horizontal movement mechanism, so that welding torch I (22) and welding torch II (33) are located directly above the pipeline to be welded and locked a first horizontal movement mechanism and a second horizontal movement mechanism; Step 4: The motor I (16) rotates to make the welding torch I (22) return to the initial position, and the position adjustment work is completed; Step 5: Start the equipment, the rotary table (4) rotates 90 degrees, the pipeline to be welded reaches the first welding station (6), the motor I (16) starts, and the first vertical moving mechanism makes the welding torch I (22) downward The welding torch I (22) reaches the welding position and starts welding. During the welding process, the motor II starts to make the welding torch I (22) rotate slowly. After the welding of the first point of the welding pipeline is completed, the motor I (16) reverses to make the welding torch I (22) get back to the initial position; Step 6: The rotary table (4) rotates 90 degrees, the pipeline to be welded arrives at the second welding station (7), the motor III (27) starts, the second vertical moving mechanism moves the welding torch II (33) downward, and the welding torch II (33) reaches the welding position and starts welding. During the welding process, the motor IV starts to make the welding torch II (33) rotate slowly. Return to the initial position, while the worker has installed the second pipeline to be welded on the loading and unloading station (5); Step 7: The rotary table (4) is rotated 90 degrees, the first pipeline to be welded goes to the cooling station (8), the second pipeline to be welded goes to the second welding station (7), and steps 5 and 6 are repeated; Step 8: The rotary table (4) rotates 90 degrees, the worker removes the welded pipeline, and at the same time installs the new pipeline to be welded on the loading and unloading station (5); Step 9: Repeat steps 5 to 8 to realize batch welding processing.