Automatic welding production line for automotive LNG (Liquefied Natural Gas) cylinders

Abstract

The invention relates to the field of LNG cylinder production, in particular to a vehicle LNG cylinder automatic welding production line which comprises a guide rail underframe and the like. According to the automatic welding production line for the automotive LNG gas cylinders, the supporting suction assembly provides rotary inner support for the automatic welding mechanical arm on the inner wall of the gas cylinder set, meanwhile, the supporting suction assembly conducts smoke particle suction work in the area close to the inner wall of the gas cylinder set, and an ash removal brush and a flame baffle are arranged on the automatic welding gun; according to the automatic welding mechanical arm, smoke dust particles adhering to a welding area on the inner wall of a gas cylinder group can be continuously removed, a shovel piece is arranged on a supporting suction assembly and matched with suction work of the supporting suction assembly, and the problems that when an automatic welding mechanical arm is used for welding work in the gas cylinder group of LNG gas cylinders, shaking is caused due to insufficient supporting, and the welding efficiency is high are solved. And the welding seam forming effect on the inner wall of the gas cylinder group is affected and damaged by smoke dust particle coverage.

Description

Technical Field

[0001] The present invention relates to the field of LNG cylinder production, and particularly to an automatic welding production line for vehicle-mounted LNG cylinders. Background Art

[0002] The LNG cylinder is composed of a cylinder body and two end heads located at the front and rear ends. On the LNG cylinder automatic production line, an automatic welding robotic arm needs to pass through the hollow area in the middle of the front end head of the cylinder group, enter the cylinder body of the cylinder group, and perform internal welding on the cylinder body of the cylinder group and the two end heads from the inside of the cylinder group. During this process, since the automatic welding robotic arm needs to extend deep into the cylinder group for a long distance, but the automatic welding robotic arm cannot be well supported inside the cylinder group, there is a small amount of shaking during the welding work of the automatic welding robotic arm inside the cylinder group, which affects the forming effect of the inner wall weld of the cylinder group. Moreover, a large amount of soot particles will be generated during the welding work of the automatic welding robotic arm inside the cylinder group. When these soot particles cover the area to be welded inside the cylinder group, it will also affect the forming effect of the inner wall weld of the cylinder group, ultimately resulting in the overall welding structure strength of the cylinder group being affected. Summary of the Invention

[0003] In order to overcome the disadvantages of insufficient support causing shaking and being affected by the coverage of soot particles to damage the forming effect of the inner wall weld of the cylinder group during the welding work of the automatic welding robotic arm inside the cylinder group of the LNG cylinder, the present invention provides an automatic welding production line for vehicle-mounted LNG cylinders.

[0004] An automatic welding production line for vehicle-mounted LNG cylinders includes a guide rail chassis, a double-ring fixed frame, an automatic welding gun, a longitudinal sliding control console, an electric control central rotating shaft, an electric control turntable, a first type of electric control telescopic arm, welding electrodes, a longitudinal sliding frame, an electric control push rod, a support and suction assembly, and an annular pipe; the double-ring fixed frame is detachably and fixedly connected to the rear side of the guide rail chassis; the longitudinal sliding control console is slidably connected to the front side of the guide rail chassis; the electric control central rotating shaft is rotatably connected to the longitudinal sliding control console; the electric control turntable is installed on the electric control central rotating shaft; the first type of electric control telescopic arm is installed on the rotating part of the electric control turntable; the automatic welding gun is installed on the telescopic part of the first type of electric control telescopic arm; an electric control feeding tray is installed on the electric control central rotating shaft; the welding electrodes are wound around the electric control feeding tray; the longitudinal sliding frame is slidably connected to the electric control central rotating shaft; the electric control push rod for controlling the forward and backward movement of the longitudinal sliding frame is installed on the electric control central rotating shaft; a plurality of support and suction assemblies are connected in a circumferential distribution around the longitudinal sliding frame; the annular pipe is fixedly connected to the longitudinal sliding frame; a suction machine is installed on the longitudinal sliding control console; a suction pipe is commonly connected between the air inlet of the suction machine and the annular pipe.

[0005] Preferably, the support suction assembly includes an electric control rotating shaft, a second electric control telescopic arm, a roller slider, a suction block, and a telescopic tube; the electric control rotating shaft is installed on the longitudinal sliding frame; the rotating component of the electric control rotating shaft is installed with the second electric control telescopic arm; the telescopic component of the second electric control telescopic arm is rotatably connected with the roller slider through a rotating shaft; the suction block is fixedly connected to the roller slider; the telescopic tube is fixedly connected to the second electric control telescopic arm; one end of the telescopic tube is connected to the annular tube; the other end of the telescopic tube is connected to the suction block.

[0006] Preferably, a first outer ring is fixedly connected to the rear side of the double annular fixing frame; a second outer ring is fixedly connected to the front side of the double annular fixing frame.

[0007] Preferably, a dust cleaning brush is fixedly connected to the first type of electric control telescopic arm, and the dust cleaning brush is located on one side of the rotation direction of the adjacent automatic welding gun.

[0008] Preferably, a flame baffle is fixedly connected to the first type of electric control telescopic arm, and the flame baffle is located between the adjacent dust cleaning brush and the automatic welding gun.

[0009] Preferably, a shovel blade is fixedly connected to the roller slider.

[0010] Preferably, the shovel blade is set to be inclined towards the rotation direction.

[0011] A production method of an automatic welding production line for vehicle-mounted LNG cylinders is characterized by comprising the following steps: Step 1, fixing the gas cylinder group. The head of the gas cylinder group is spliced and clamped on the double annular fixing frame. Step 2, alignment work. Through the longitudinal sliding console, control the automatic welding robotic arm composed of the electric control central rotating shaft, the electric control turntable, and the first type of electric control telescopic arm, and align the automatic welding gun with the two annular splicing gaps of the gas cylinder body and the front and rear end heads of the gas cylinder group in sequence. At the same time, the support suction assembly closely adheres to one side of the annular splicing gap to be welded on the inner wall of the gas cylinder group to provide internal support for the automatic welding robotic arm. Step 3, rotary welding work. Through the automatic welding robotic arm, control the automatic welding gun to perform rotary welding work on the annular splicing gaps of the gas cylinder group aligned by it in sequence. Step 4, soot particle suction work. While step 3 is being carried out, the support suction assembly rotates along the inner wall of the gas cylinder group, continuously providing internal support for the automatic welding robotic arm. At the same time, the support suction assembly is close to the rotary welding work area inside the gas cylinder group to perform suction work on the generated soot particles.

[0012] Preferably, in the work of step 3, the soot particles adhered to the area to be welded on the inner wall of the gas cylinder group are removed by the dust cleaning brush.

[0013] Preferably, during step four, the weld seam on the inner wall of the gas cylinder group is cooled by the support and suction assembly; after step four, the shovel on the support and suction assembly is used to scrape away the welding slag from the weld seam on the inner wall of the gas cylinder group.

[0014] The present invention discloses an automatic welding production line for LNG gas cylinders for vehicles, which is composed of an electric control center rotating shaft, an electric control turntable and an electric control telescopic arm to control an automatic welding gun to perform welding work inside a gas cylinder group. A support suction component is also provided on the electric control center rotating shaft through a longitudinal sliding frame and an electric control push rod. The support suction component provides a rotating internal support for the automatic welding robot arm on the inner wall of the gas cylinder group, and the support suction component can also perform smoke and dust particle suction work in the area close to the inner wall of the gas cylinder group. The automatic welding production line of the vehicle LNG gas cylinder of the present invention is provided with a dust cleaning brush and a flame shield on the automatic welding gun, which can continuously remove the smoke particles adhered to the welding area of ​​the inner wall of the gas cylinder group; The automatic welding production line of the vehicle LNG cylinder of the present invention has a shovel blade on the support suction assembly, which cooperates with the suction work of the support suction assembly to realize the integration of the welding seam cooling work and the welding slag shoveling work into the automatic welding forming production line of the present invention; The automatic welding production line for vehicle LNG cylinders of the present invention solves the technical problems of shaking caused by insufficient support and damage to the weld forming effect of the inner wall of the cylinder group due to the coverage of smoke particles when using an automatic welding robot arm to perform welding work inside the cylinder group of the LNG cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the placement state of the gas cylinder group of the present invention; Figure 3 It is a cross-sectional schematic diagram of the gas cylinder assembly of the present invention in a placement state; Figure 4 It is a schematic diagram of a partial three-dimensional structure of the automated welding robot arm of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the electric-controlled feeding tray of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the support and suction assembly of the present invention; Figure 7 It is a schematic diagram of a partial three-dimensional structure of the support and suction assembly of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the dust cleaning brush and the flame baffle plate of the present invention.

[0016] Description of the drawing reference numerals: 1 - guide rail chassis, 2 - double - ring fixing frame, 21 - first outer ring, 22 - second outer ring, 3 - automatic welding gun, 31 - longitudinal sliding control console, 32 - electric control central rotating shaft, 33 - electric control turntable, 34 - first type of electric control telescopic arm, 35 - dust cleaning brush, 36 - flame baffle, 4 - welding rod, 41 - electric control feeding tray, 51 - longitudinal sliding frame, 52 - electric control push rod, 61 - electric control rotating shaft, 62 - second type of electric control telescopic arm, 63 - roller slider, 64 - suction block, 65 - shovel blade, 71 - annular pipe, 72 - telescopic pipe, 73 - suction machine, 74 - suction pipe, 8 - gas cylinder group. Detailed implementation manners

[0017] The present invention will be further described below in conjunction with the drawings and the detailed implementation manners.

[0018] Embodiment 1 An automatic welding production line for vehicle - used LNG gas cylinders, as Figures 1 - 8 shown, includes a guide rail chassis 1, a double - ring fixing frame 2, an automatic welding gun 3, a longitudinal sliding control console 31, an electric control central rotating shaft 32, an electric control turntable 33, a first type of electric control telescopic arm 34, a welding rod 4, a longitudinal sliding frame 51, an electric control push rod 52, a support suction assembly, and an annular pipe 71; the rear side of the guide rail chassis 1 is fixedly connected with the double - ring fixing frame 2 through fasteners; the rear side of the double - ring fixing frame 2 is fixedly connected with a first outer ring 21; the front side of the double - ring fixing frame 2 is fixedly connected with a second outer ring 22; the front side of the guide rail chassis 1 is slidably connected with; the longitudinal sliding control console 31 is rotatably connected with an electric control central rotating shaft 32; the rear end of the electric control central rotating shaft 32 is provided with an electric control turntable 33; the rotating part of the electric control turntable 33 is provided with a first type of electric control telescopic arm 34; the telescopic part of the first type of electric control telescopic arm 34 is provided with an automatic welding gun 3; the electric control central rotating shaft 32 is provided with an electric control feeding tray 41; the welding rod 4 is wound around the electric control feeding tray 41; the automatic welding gun 3 is internally provided with a feeding mechanism, and the automatic welding gun 3 conveys the welding rod 4 to the nozzle end of the automatic welding gun 3 through the internally - provided feeding mechanism; the longitudinal sliding frame 51 is slidably connected to the electric control central rotating shaft 32; the electric control central rotating shaft 32 is provided with an electric control push rod 52; the telescopic end of the electric control push rod 52 is fixedly connected to the longitudinal sliding frame 51; a plurality of support suction assemblies are circumferentially distributed and connected around the longitudinal sliding frame 51; the longitudinal sliding frame 51 is fixedly connected with an annular pipe 71; the longitudinal sliding control console 31 is provided with a suction machine 73; the air inlet of the suction machine 73 and the annular pipe 71 are jointly connected through a suction pipe 74.

[0019] As Figures 4 - 7As shown in the figure, the support suction assembly includes an electric control rotating shaft 61, a second electric control telescopic arm 62, a roller slider 63, a suction block 64, and a telescopic pipe 72; the electric control rotating shaft 61 is installed on the longitudinal sliding frame 51; the rotating component of the electric control rotating shaft 61 is installed with the second electric control telescopic arm 62; the telescopic component of the second electric control telescopic arm 62 is rotationally connected with the roller slider 63 through a rotating shaft, and the roller slider 63 closely adheres to the inner wall of the gas cylinder group 8 through the roller component during the working process; the suction block 64 is fixedly connected to the roller slider 63; the telescopic pipe 72 is fixedly connected to the second electric control telescopic arm 62; one end of the telescopic pipe 72 is connected to the annular pipe 71; the other end of the telescopic pipe 72 is connected to the suction block 64.

[0020] The automatic welding forming production line of the present invention, which is abbreviated as the automatic welding production line for vehicle-mounted LNG gas cylinders, is composed of an electric control central rotating shaft 32, an electric control turntable 33, and a first type of electric control telescopic arm 34 to form an automatic welding robotic arm that controls the automatic welding gun 3 to perform welding work. The air outlet of the suction machine 73 of the automatic welding forming production line of the present invention is externally connected to an exhaust gas treatment device. The working steps of the automatic welding forming production line of the present invention are as follows.

[0021] First, the staff members splice and clamp the gas cylinder body and two end heads of the gas cylinder group 8 on the double-ring fixing frame 2. The first outer ring 21 provides external support for the right outer surface of the gas cylinder body of the gas cylinder group 8 and the front side of the outer surface of the front end head of the gas cylinder group 8. The second outer ring 22 provides external support for the right outer surface of the gas cylinder body of the gas cylinder group 8 and the front side of the outer surface of the rear end head of the gas cylinder group 8, completing the placement of the gas cylinder group 8. Subsequently, the longitudinal sliding console 31 moves backward along the guide rail chassis 1, driving the automatic welding robotic arm, the automatic welding gun 3, and each support and suction component to pass backward through the central hollow area of the front end head of the gas cylinder group 8 and enter the gas cylinder body of the gas cylinder group 8. The longitudinal sliding console 31 successively moves the automatic welding robotic arm and the automatic welding gun 3 to align with the two annular splicing gaps between the gas cylinder body of the gas cylinder group 8 and the front and rear end heads respectively. Under the control of the automatic welding robotic arm over the automatic welding gun 3, the automatic welding gun 3 performs rotary welding on these two annular splicing gaps respectively from inside the gas cylinder group 8. At the same time, the longitudinal sliding frame 51 and the electric control push rod 52 control each support and suction component to align with the left side areas of these two annular splicing gaps successively. When the automatic welding gun 3 performs rotary welding on the annular splicing gap between the gas cylinder body of the gas cylinder group 8 and the rear end head, the longitudinal sliding frame 51 and the electric control push rod 52 control the support and suction component to closely adhere to the area on the inner wall of the gas cylinder group 8 that aligns with the first outer ring 21, providing internal support for the automatic welding robotic arm. At the same time, the first outer ring 21 provides external support corresponding to the support and suction component for the outer surface of the gas cylinder group 8. When the automatic welding gun 3 performs rotary welding on the annular splicing gap between the gas cylinder body of the gas cylinder group 8 and the front end head, the longitudinal sliding frame 51 and the electric control push rod 52 control the support and suction component to closely adhere to the area on the inner wall of the gas cylinder group 8 that aligns with the second outer ring 22, providing internal support for the automatic welding robotic arm. At the same time, the second outer ring 22 provides external support corresponding to the support and suction component for the outer surface of the gas cylinder group 8.

[0022] During the process of the automatic welding robotic arm controlling the automatic welding gun 3 to perform rotary welding on the annular splicing gap of the gas cylinder group 8, first, the electric control turntable 33 drives the first type of electric control telescopic arm 34 and the automatic welding gun 3 connected thereto to align with the annular splicing gap of the gas cylinder group 8. Then, the first type of electric control telescopic arm 34 pushes the automatic welding gun 3 to approach the annular splicing gap of the gas cylinder group 8. Subsequently, the longitudinal sliding frame 51 pushes the electric control push rod 52 to move backward along the electric control central rotating shaft 32. At the same time, the electric control rotating shaft 61 drives the second electric control telescopic arm 62 to rotate towards the inner wall direction of the gas cylinder group 8. At the same time, the second electric control telescopic arm 62 pushes the roller slider 63 to extend towards the inner wall direction of the gas cylinder group 8, so that the roller part of the roller slider 63 closely adheres to the corresponding area on the inner wall of the gas cylinder group 8. All the roller sliders 63 that closely adhere to the inner wall of the gas cylinder group 8 jointly provide internal support for the electric control central rotating shaft 32 of the automatic welding robotic arm.

[0023] After that, the electric control center rotating shaft 32 drives the first electric control telescopic arm 34 and the automatic welding gun 3 connected thereto to rotate. At the same time, the electric control feeding tray 41 cooperates with the feeding mechanism built in the automatic welding gun 3 to continuously convey the welding electrode 4 to the nozzle end of the automatic welding gun 3, so that during the rotation of the automatic welding gun 3 along the annular splicing gap of the gas cylinder group 8, the welding electrode 4 is continuously welded in the annular splicing gap of the gas cylinder group 8 to complete the rotary welding work of the gas cylinder group 8. At the same time, the continuously rotating electric control center rotating shaft 32 drives each support suction assembly on the longitudinal sliding frame 51 to rotate closely against the inner wall of the gas cylinder group 8 through the roller parts of the roller slider 63, so that the suction block 64 on the roller slider 63 rotates along the annular splicing gap of the gas cylinder group 8 following the automatic welding gun 3 in the area close to the annular splicing gap of the gas cylinder group 8. At the same time, the suction machine 73 successively performs gas suction work on the suction block 64 through the suction pipe 74, the annular pipe 71, and the telescopic pipe 72, so that the 64 - suction block sucks the surrounding soot particles in the area close to the annular splicing gap of the gas cylinder group 8, realizing that the soot particles generated during the continuous rotary welding work of the automatic welding gun 3 can be timely sucked away by each suction block 64, and the sucked - away soot particles are discharged by the suction machine 73 into the external waste gas treatment equipment.

[0024] Through the above working steps, the technical problems of insufficient support causing shaking and the damage to the forming effect of the inner - wall weld of the gas cylinder group 8 due to being covered by soot particles during the welding work inside the gas cylinder group 8 of the LNG gas cylinder using an automated welding robotic arm are solved.

[0025] Embodiment 2 On the basis of Embodiment 1, as Figures 1 - 8As shown in the figure, a dust cleaning brush 35 is fixedly connected to the first type of electric control telescopic arm 34 in this embodiment. The dust cleaning brush 35 is located on one side of the rotation direction of the adjacent automatic welding gun 3. During the rotation welding operation of the inner wall of the gas cylinder group 8 by the automatic welding gun 3, a large amount of soot particles will be generated. Although the suction block 64 timely sucks away the generated soot particles, there will still be some soot particles that are not sucked away and cover various areas of the inner wall of the gas cylinder group 8. Therefore, during the rotation welding operation of the inner wall of the gas cylinder group 8 by the electric control central rotating shaft 32 driving the automatic welding gun 3, first, the dust cleaning brush 35 on the automatic welding gun 3 clears the soot particles adhering to the area to be welded on the inner wall of the gas cylinder group 8, improving the forming quality of the weld on the inner wall of the gas cylinder group 8; a flame baffle 36 is fixedly connected to the first type of electric control telescopic arm 34. The flame baffle 36 is located between the adjacent dust cleaning brush 35 and the automatic welding gun 3. An isolation barrier is formed between the dust cleaning brush 35 and the automatic welding gun 3 through the flame baffle 36, providing isolation protection for the dust cleaning brush 35 against the spark sputtering from the automatic welding gun 3, enabling the installation position of the dust cleaning brush 35 to be closer to the automatic welding gun 3, so that the cleaning position of the dust cleaning brush 35 is closer to the welding position of the automatic welding gun 3, further improving the forming quality of the weld on the inner wall of the gas cylinder group 8; both the left and right ends of the flame baffle 36 are set to be inclined structures facing away from the adjacent dust cleaning brush 35. When the dust cleaning brush 35 is located above the automatic welding gun 3, the soot particles brushed down from the inner wall of the gas cylinder group 8 by the dust cleaning brush 35 can actively slide downward along the inclined structures at both ends of the flame baffle 36, so that the soot particles are as far away as possible from the automatic welding gun 3 that is in the welding operation.

[0026] Embodiment 3 On the basis of Embodiment 2, as Figures 1 - 8 shown, a shovel blade 65 is fixedly connected to the side of the roller slider 63 facing the inner wall of the gas cylinder group 8 during the support work in this embodiment; the shovel blade 65 is set to be an inclined structure facing the rotation direction.

[0027] In this embodiment, during the rotation welding operation of the inner wall of the gas cylinder group 8 by the electric control central rotating shaft 32 driving the automatic welding gun 3, the electric control central rotating shaft 32 drives the suction block 64 on the roller slider 63 to rotate synchronously along the inner wall of the gas cylinder group 8. The suction block 64 timely sucks away the soot particles generated by the operation of the automatic welding gun 3 inside the gas cylinder group 8. At the same time, the air inside the gas cylinder group 8 will also be continuously sucked away by the suction block 64. At this time, fresh air from the outside continuously flows into the inside of the gas cylinder group 8. During this period, each suction block 64 continuously approaches the weld formed on the inner wall of the gas cylinder group 8 for suction work, allowing the fresh air from the outside to continuously flow through the weld on the inner wall of the gas cylinder group 8 during this suction work. Therefore, the weld on the inner wall of the gas cylinder group 8 will be cooled by air cooling.

[0028] After finishing the welding work on the inner wall of the gas cylinder group 8, the suction block 64 continues to rotate and continuously sucks against the weld seam on the inner wall of the gas cylinder group 8. The weld seam on the inner wall of the gas cylinder group 8 will be quickly formed and cooled under the air cooling treatment of the continuously flowing external fresh air. At this time, the welding slag on the weld seam on the inner wall of the gas cylinder group 8 will also be quickly embrittled during the cooling process and peeled off from the weld seam on the inner wall of the gas cylinder group 8. Subsequently, the electric control rotating shaft 61 and the second electric control telescopic arm 62 jointly drive the shovel blade 65 on the roller slider 63 to closely adhere to the weld seam on the inner wall of the gas cylinder group 8. As the electric control central rotating shaft 32 drives the shovel blade 65 on the roller slider 63 to rotate, the shovel blade 65 will continuously adhere to the weld seam on the inner wall of the gas cylinder group 8 and remove the embrittled and peeled welding slag on the weld seam on the inner wall of the gas cylinder group 8, realizing the combination of the weld cooling work and the welding slag removal work into the automatic welding and forming production line of the present invention, effectively reducing the overall welding process and the time required for the welding work of the gas cylinder group 8, and improving the overall welding work efficiency of the gas cylinder group 8.

[0029] Although the present invention has been described in detail with reference to the above embodiments, it is obvious to those skilled in the art through the present disclosure that various changes or modifications can be made to the present invention without departing from the principle and spirit scope of the present invention defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, rather than to limit the present invention, and the scope of protection is defined by the content of the claims.

Claims

1. An automatic welding production line for LNG gas cylinders for vehicles, comprising: a guide rail frame (1); a double annular fixing frame (2) detachably fixedly connected to the rear side of the guide rail frame (1); and a longitudinal sliding control console (31) slidably connected to the front side of the guide rail frame (1); It is characterized in that The electric control center also includes an electric control center rotating shaft (32); the electric control center rotating shaft (32) is rotatably connected to the longitudinal sliding control panel (31); the electric control center rotating shaft (32) is installed with an electric control turntable (33); a first electric control telescopic arm (34) is installed on the rotating part of the electric control turntable (33); an automatic welding gun is installed on the telescopic part of the first electric control telescopic arm (34); an electric control feeding tray (41) is installed on the electric control center rotating shaft (32); a welding rod (4) is wound around the electric control feeding tray (41); A longitudinal sliding frame (51) is slidably connected to the rotating shaft (32); an electric control push rod (52) for controlling the longitudinal sliding frame (51) to move in a forward and backward direction is installed on the electric control center rotating shaft (32); a plurality of supporting suction components are connected in a ring-shaped distribution around the longitudinal sliding frame (51); an annular tube (71) is fixedly connected to the longitudinal sliding frame (51); a suction machine (73) is installed on the longitudinal sliding control console (31); and a suction pipe (74) is connected between the air inlet of the suction machine (73) and the annular tube (71).

2. The automatic welding production line for LNG cylinders for vehicles according to claim 1 is characterized in that: The supporting suction assembly comprises an electric-controlled rotating shaft (61); the electric-controlled rotating shaft (61) is mounted on the longitudinal sliding frame (51); a second electric-controlled telescopic arm (62) is mounted on the rotating component of the electric-controlled rotating shaft (61); a roller slider (63) is rotatably connected to the telescopic component of the second electric-controlled telescopic arm (62) via the rotating shaft; a suction block (64) is fixedly connected to the roller slider (63); a telescopic tube (72) is fixedly connected to the second electric-controlled telescopic arm (62); one end of the telescopic tube (72) is connected to the annular tube (71); and the other end of the telescopic tube (72) is connected to the suction block (64).

3. The automatic welding production line for LNG cylinders for vehicles according to claim 1 is characterized in that: A first outer ring (21) is fixedly connected to the rear side of the double-annular fixing frame (2); and a second outer ring (22) is fixedly connected to the front side of the double-annular fixing frame (2).

4. The automatic welding production line for LNG cylinders for vehicles according to any one of claim 1, characterized in that: A cleaning brush (35) is fixedly connected to the first electrically controlled telescopic arm (34), and the cleaning brush (35) is located on one side of the rotation direction of the adjacent automatic welding gun.

5. The automatic welding production line for LNG cylinders for vehicles according to claim 4 is characterized in that: A flame shield (36) is fixedly connected to the first electrically controlled telescopic arm (34), and the flame shield (36) is located between the adjacent cleaning brushes (35) and the automatic welding gun.

6. The automatic welding production line for LNG cylinders for vehicles according to claim 1 is characterized in that: A shovel piece (65) is fixedly connected to the roller slider (63).

7. The automatic welding production line for LNG cylinders for vehicles according to claim 6 is characterized in that: The shovel blade (65) is arranged to be inclined toward the rotation direction.

8. A method for automatic welding of LNG gas cylinders for vehicles, the method using an automatic welding production line for LNG gas cylinders for vehicles according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: fix the gas cylinder group (8) by clamping the gas cylinder group (8) head onto the double annular fixing frame (2); Step 2, alignment work, by controlling the automatic welding robot arm composed of the electric control center shaft (32), the electric control turntable (33), and the first electric control telescopic arm (34) through the longitudinal sliding control console (31), the automatic welding gun (3) is aligned with the two annular splicing gaps of the gas cylinder body and the front and rear end caps of the gas cylinder group (8) in sequence, and at the same time, the support suction component is closely attached to the inner wall of the gas cylinder group (8) on one side of the annular splicing gap to be welded, providing internal support for the automatic welding robot arm; Step 3, performing rotation welding, wherein the automatic welding robot arm sequentially controls the automatic welding gun (3) to perform rotation welding on the annular joint gap of the gas cylinder group (8) aligned therewith; Step 4, the smoke and dust particles are sucked out. While step 3 is being performed, the suction component is supported to rotate along the inner wall of the gas cylinder group (8) to continuously provide internal support for the automated welding robot arm. At the same time, the suction component is supported to be close to the rotating welding work area inside the gas cylinder group (8) to suck out the generated smoke and dust particles.

9. The production method of the automatic welding production line for vehicle LNG cylinders according to claim 8 is characterized in that: In step three, smoke particles adhering to the area of ​​the inner wall of the gas cylinder assembly (8) to be welded are removed by using a cleaning brush (35).

10. The production method of the automatic welding production line for vehicle LNG cylinders according to claim 8 is characterized in that: In step four, the weld seam on the inner wall of the gas cylinder assembly (8) is cooled by the support and suction assembly; after step four, the shovel (65) on the support and suction assembly is used to scrape away the welding slag on the inner wall of the gas cylinder assembly (8).

Images