Automatic welding device for ball joint steel tube handrail

Abstract

The utility model relates to the technical field of welding equipment, and discloses an automatic welding device for ball joint steel pipe railings, which comprises a machine body, a placing table fixedly connected to the upper end of the machine body, a rotating motor fixedly connected to the upper end of the machine body, an adjusting frame fixedly connected to the output end of the rotating motor through the machine body, and a clamping rod slidably connected to the interior of the adjusting frame. The end of the clamping rod is fixedly connected with a clamping frame, and welding heads are installed on the two sides of the machine body. The two clamping rods drive the clamping frame to oppositely move from the two sides to fix the clamping frame, then the steel pipe is placed on the containing table to be limited by the containing table, the two welding heads weld the connecting position of the welding ball and the steel pipe from the two sides at the same time, and after the welding ball and the steel pipe are preliminarily welded and fixed, the rotating motor is started to drive the adjusting frame to rotate; and meanwhile, the welding head is started to continue welding, the welding ball does not need to be manually adjusted, and therefore the welding efficiency of the device in the welding process of the welding ball is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding equipment technical field, specifically point to a kind of ball node steel pipe railing automatic welding device. BACKGROUND

[0002] Ball node steel pipe railing, namely ball joint railing, is a new type of combined railing, with good corrosion resistance, hardness, aesthetics and economic advantages, and is usually used in humid environment and places with strong corrosion, such as sewage treatment plant, municipal, power machinery, petrochemical industry, highway and railway, bridge and wharf, and civil building, etc. Ball joint railing is composed of multiple steel balls with equal diameter and steel pipes (columns), and the spherical node design is not only beautiful, but also has enough strength to resist lateral and vertical forces. Ball joints are provided at the connection between the ball and the steel pipe, and connecting holes for mounting the steel pipe (horizontal bar) are provided on the ball joints.

[0003] The existing Chinese public patent (authorized announcement number: CN214444478U) mentions a kind of full-automatic derusting and welding steel device for railing. The trolley is provided with a liquid storage tank on one side of the top end, a motor is fixedly arranged on the middle of the top end of the liquid storage tank, the driving shaft of the motor is coaxially fixedly connected with the stirring shaft, multiple stirring rods are fixedly arranged on the outer side of the stirring shaft, a first liquid conveying pipe is fixedly arranged on one side of the bottom of the liquid storage tank, and a high-pressure water pump is fixedly arranged on one side of the front of the first liquid conveying pipe. The utility model is provided with a liquid storage tank, a stirring shaft, a high-pressure water pump and a spraying nozzle. The liquid storage tank can store metal rust remover. When the motor is started, the stirring shaft starts to rotate, thereby driving the stirring rods to rotate, so as to stir the metal rust remover and prevent the formation of internal deposits. At the same time, the liquid storage tank is fixedly connected with the high-pressure water pump through the first liquid conveying pipe, and the high-pressure water pump delivers the rust remover to the spraying nozzle through the second liquid conveying pipe. The spraying nozzle is used for derusting the railing.

[0004] When the existing device is used for welding the railing, the railing is fixed by the device, and then the intersection between the railings is welded by the device. However, the existing device is not convenient for fixing the welding ball when welding the ball node steel pipe. When the railing is welded on the welding ball, the connection between the two needs to be welded circumferentially, which further increases the difficulty of fixing the welding ball. When the second place needs to be welded after welding a place on the welding ball, the welding ball needs to be rotated again, which further causes inconvenience in welding the ball node. SUMMARY

[0005] The purpose of the present application is to solve the problem of inconvenience in fixing the welding ball with the existing device, and the need to adjust the position of the welding ball frequently when welding between the welding ball and the railing, which causes inconvenience in welding the ball node steel pipe railing. The present application provides a kind of ball node steel pipe railing automatic welding device.

[0006] The application specifically adopts the following technical scheme to achieve the above-mentioned purpose:

[0007] The automatic welding device for the ball joint steel pipe railing comprises a machine body, a placing table fixedly connected to the upper end of the machine body, a rotating motor fixedly connected to the upper end of the machine body, an adjusting frame fixedly connected to the output end of the rotating motor and penetrating through the machine body, a clamping rod slidingly connected to the inside of the adjusting frame, a clamping frame fixedly connected to the end of the clamping rod, welding heads installed on the two sides of the machine body, and an adjusting structure arranged between the adjusting frame and the clamping frame.

[0008] By adopting the above technical scheme, the welding ball is placed inside the two clamping frames, the clamping frames are driven by the two clamping rods to move towards each other from the two sides to fix the welding ball, then the steel pipe is placed on the placing table to be limited by the placing table, the tail of the steel pipe is pushed to make the end of the steel pipe adhere to the surface of the welding ball, and then the welding heads are used to weld the connection between the welding ball and the steel pipe from the two sides at the same time. After the welding ball and the steel pipe are preliminarily welded and fixed, the rotating motor is started to drive the adjusting frame to rotate, thereby driving the welding ball in the middle of the clamping frame to rotate. When the welding ball rotates, the steel pipe fixed on the surface of the welding ball also rotates. At this time, the welding heads are started to continue welding while the welding ball and the steel pipe are rotating. The welding ball does not need to be adjusted manually, and the tight welding between the steel pipe and the welding ball can be completed. This not only improves the welding efficiency of the device when welding the welding ball, but also enables the device to be automatically welded, reduces the participation of manual labor and reduces the consumption of manpower.

[0009] Further, the adjusting structure comprises a clamping motor fixedly connected to one end of the adjusting frame, a bidirectional screw rod fixedly connected to the telescopic end of the clamping motor and penetrating through the adjusting frame, and the bidirectional screw rod is rotationally connected with the adjusting frame, and the clamping rod is threadedly connected with the bidirectional screw rod.

[0010] By adopting the above technical scheme, the welding ball is placed inside the two clamping frames, and then the clamping motor is started to drive the bidirectional screw rod to rotate, so that the two clamping rods drive the clamping frames to move towards each other from the two sides to fix the welding ball.

[0011] Further, a guide column is fixedly connected to the inside of the adjusting frame, and the outer surface of the guide column is slidingly connected with the clamping rod.

[0012] By adopting the above technical scheme, the clamping rod moves along the guide column, so that the clamping rod is more stable.

[0013] Further, a sliding column is slidingly connected to the upper end of the placing table, a clamping plate is fixedly connected to the end of the sliding column, and an arc-shaped groove is formed in the inside of the clamping plate.

[0014] By adopting the above technical scheme, the clamping plate can limit the displacement of the steel pipe, but will not excessively prevent the rotation of the steel pipe.

[0015] Further, the sliding column is sleeved with a limiting spring outside, two ends of the limiting spring are fixedly connected with the placing table and the clamping plate respectively, and a plurality of rotating wheels are rotatably connected inside the clamping plate.

[0016] By adopting the above technical scheme, when the welding ball rotates, the steel pipe preliminarily welded on the surface of the welding ball also rotates, the steel pipe is conveniently rotated when being limited by the rotating wheel, and the displacement of the steel pipe is limited by the clamping plate, so that the steel pipe is more in line with the required adjustment angle in the welding process of the ball joint.

[0017] Further, the sliding column is sleeved with a limiting spring outside, two ends of the limiting spring are fixedly connected with the placing table and the clamping plate respectively, and a plurality of rotating wheels are rotatably connected inside the clamping plate.

[0018] By adopting the above technical scheme, the two clamping rods move in opposite directions when the clamping motor is started to drive the bidirectional screw rod to rotate reversely, the clamping frame slightly moves away from the two sides of the welding ball, the rotating spring is reset to push the limiting frame to fix the two sides of the welding ball, and the rotating column and the rotating spring are loosened to enable the rotating column to rotate.

[0019] Further, the adjusting frame is rotatably connected with a resisting rod at the upper end, the resisting rod is rotatably connected with an adjusting wheel at the end, the adjusting frame is fixedly connected with a torsional spring at the upper end, and the torsional spring is fixedly connected with the resisting rod at the end.

[0020] By adopting the above technical scheme, the resisting rod always drives the adjusting wheel to rotate towards the welding ball through the continuous pushing of the torsional spring, and the welding ball is limited by the three of the adjusting wheel and the two limiting frames.

[0021] Further, the resisting rod is fixedly connected with a driving motor outside, and the output end of the driving motor and the outside of the adjusting wheel are both mounted with a belt.

[0022] By adopting the above technical scheme, the driving motor is started to drive the belt to rotate, so that the adjusting wheel is driven to rotate, and the welding ball is driven to rotate by the adjusting wheel.

[0023] In summary, the present application has at least one of the following beneficial effects:

[0024] The application places the welding ball inside the two clamping frames, fixes it by moving the clamping frames from both sides to each other through the two clamping rods, then places the steel pipe on the placement table to limit it, pushes the tail of the steel pipe to make its end adhere to the surface of the welding ball, and further welds the connection between the welding ball and the steel pipe from both sides through the two welding heads. After the preliminary welding and fixation of the welding ball and the steel pipe, the rotating motor is started to drive the adjusting frame to rotate, thereby driving the welding ball in the middle of the clamping frame to rotate. At this time, the welding head is started to continue welding while the welding ball and the steel pipe are rotating. The welding ball does not need to be adjusted, and the tight welding between the steel pipe and the welding ball can be completed. This improves the welding efficiency of the device when welding the welding ball.

[0025] When the welding position on the welding ball needs to be switched, the clamping frame is slightly moved away from both sides of the welding ball. The contact rod is always driven by the torsional spring to rotate the adjusting wheel towards the welding ball. The welding ball is limited by the three of the adjusting wheel and the two limiting frames. The rotating column and the rotating spring are loosened so that they can rotate. The welding ball can rotate with the rotation of the adjusting wheel. The drive motor is started to drive the belt to rotate and drive the adjusting wheel to rotate. The adjusting wheel drives the welding ball to rotate. When the next welding point of the rotating welding ball corresponds to the steel pipe, the drive motor is stopped to keep the current position of the welding ball. Then the clamping rods are moved towards each other to fix the welding ball so that it does not rotate again. This reduces the difficulty of position adjustment and improves the convenience of the device in the ball node steel pipe welding process. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a perspective structure schematic view of a ball node steel pipe railing automatic welding device in the application;

[0027] Figure 2 is an internal schematic view of the adjusting frame of a ball node steel pipe railing automatic welding device in the application;

[0028] Figure 3 is a local sectional view of the adjusting frame of a ball node steel pipe railing automatic welding device in the application;

[0029] Figure 4 is a placement table structure schematic view of a ball node steel pipe railing automatic welding device in the application;

[0030] Figure 5 is a Figure 2 is an enlarged schematic view of A in the application;

[0031] Figure 6 is aFigure 3 Enlarged view of the middle B.

[0032] Mark explanation:

[0033] 1, body; 2, adjusting frame; 3, clamping rod; 4, clamping frame; 5, rotating motor; 6, welding head; 7, placement table; 8, clamping plate; 9, rotating wheel; 10, bidirectional screw; 11, clamping motor; 12, guide column; 13, sliding column; 14, limit spring; 15, abutting rod; 16, torsional spring; 17, drive motor; 18, belt; 19, adjusting wheel; 20, limit frame; 21, rotating column; 22, rotating spring. DETAILED DESCRIPTION

[0034] The technical scheme in the embodiments of the utility model will be described below in conjunction with the drawings of the embodiments of the utility model. Figures 1-6 The technical scheme in the embodiments of the utility model will be described below in conjunction with the drawings of the embodiments of the utility model.

[0035] Refer to Figure 1 With Figure 4 The utility model provides a kind of technical scheme: a kind of ball node steel pipe railing automatic welding device, including body 1, placement table 7 is fixedly connected in body 1 upper end, rotating motor 5 is fixedly connected in body 1 upper end, adjusting frame 2 is fixedly connected in the output end of rotating motor 5 and penetrates body 1, clamping rod 3 is slidably connected in adjusting frame 2, clamping frame 4 is fixedly connected in clamping rod 3 end, welding head 6 is installed in the both sides of body 1, adjusting structure is provided between adjusting frame 2 and clamping frame 4.

[0036] When the device is used to weld the spherical node steel pipe pole, the welding ball is first placed inside the two clamping frames 4, the clamping frames 4 are driven by the two clamping rods 3 to move towards each other from both sides to fix them, then the steel pipe is placed on the placement table 7 to be limited by the placement table 7, and then the tail of the steel pipe is pushed to make the end of the steel pipe adhere to the surface of the welding ball, or the end of the steel pipe is inserted into the welding groove reserved in the welding ball, and then the two welding heads 6 are used to weld the connection between the welding ball and the steel pipe from both sides at the same time, and after the welding ball and the steel pipe are preliminarily welded, the rotating motor 5 is started to drive the adjusting frame 2 to rotate, thereby driving the welding ball in the middle of the clamping frame 4 to rotate, when the welding ball rotates, the steel pipe fixed on the surface of the welding ball also rotates, at this time, the welding head 6 is started to continue welding while the welding ball and the steel pipe are rotating, so that the welding head 6 can automatically circumferentially weld the connection between the steel pipe and the welding ball during welding, so that the existing device can complete the tight welding between the steel pipe and the welding ball without manual adjustment of the welding ball, which not only improves the welding efficiency of the device when welding the welding ball, but also enables automatic welding to reduce the participation of manual labor and reduce the consumption of manpower.

[0037] Referring to Figure 1 With Figure 2 , Figure 4 The adjusting structure includes a clamping motor 11 fixedly connected to one end of the adjusting frame 2, a bidirectional screw rod 10 fixedly connected to the telescopic end of the clamping motor 11 and penetrating through the adjusting frame 2, the bidirectional screw rod 10 being rotatably connected to the adjusting frame 2, and the clamping rod 3 being threadedly connected to the bidirectional screw rod 10. The adjusting frame 2 is fixedly connected with a guide column 12 inside, and the outer surface of the guide column 12 is slidably connected with the clamping rod 3. The placement table 7 is slidably connected with a sliding column 13 at the upper end, and the sliding column 13 is fixedly connected with a clamping plate 8 at the end, and the clamping plate 8 is internally provided with an arc-shaped groove. The sliding column 13 is externally sleeved with a limiting spring 14, and the limiting spring 14 is fixedly connected with the placement table 7 and the clamping plate 8 at both ends, and the clamping plate 8 is rotatably connected with a plurality of rotating wheels 9 inside.

[0038] When the device is used to weld the spherical node steel pipe pole, first, the welding ball is placed inside the two clamping frames 4, then the clamping motor 11 is started to drive the bidirectional screw rod 10 to rotate, so that the two clamping rods 3 drive the clamping frames 4 to move from both sides to fix the welding ball, then the steel pipe is placed between the clamping plates 8 installed at the upper end of the placement table 7, then the steel pipe is pressed down to move downward along the inner part of the clamping plates 8, when the steel pipe is pressed down, it will squeeze the rotating wheels 9 on both sides, which makes the two clamping plates 8 move in opposite directions along the sliding columns 13 and squeeze the limiting springs 14 on the sliding columns 13 to shrink, until the steel pipe moves to the bottom of the clamping plates 8 and no longer squeezes the rotating wheels 9, at this time the limiting springs 14 reset to push the clamping plates 8 to move along the sliding columns 13 to limit the steel pipe from both sides, then the tail of the steel pipe is pushed to make the end of the steel pipe fit the surface of the welding ball, or the end of the steel pipe is inserted into the welding groove reserved in the welding ball, further welding the connection between the welding ball and the steel pipe from both sides by the two welding heads 6, and after the welding ball and the steel pipe are preliminarily welded, the rotating motor 5 is started to drive the adjusting frame 2 to rotate, thereby driving the welding ball in the middle of the clamping frame 4 to rotate, when the welding ball rotates, it also drives the steel pipe preliminarily welded on its surface to rotate, the rotating wheels 9 facilitate the rotation of the steel pipe when it is limited, at the same time the clamping plates 8 can limit the displacement of the steel pipe to make the steel pipe more conform to the required adjustment angle in the welding process of the spherical node welding, at this time the welding heads 6 continue to weld while the welding ball and the steel pipe are rotating, so that the welding heads 6 can automatically circumferentially weld the connection between the steel pipe and the welding ball during the welding process, so that the existing device can complete the tight welding between the steel pipe and the welding ball without manual adjustment of the welding ball when welding the welding ball and the steel pipe, which not only improves the welding efficiency of the device when welding the welding ball, but also enables automatic welding to reduce the involvement of manual labor and reduce labor consumption.

[0039] Referring to Figure 2 With Figure 3 , Figure 5 , Figure 6 , the rotating column 21 is slidably connected inside the clamping frame 4, the rotating column 21 is fixedly connected with the limiting frame 20 at the end, the rotating spring 22 is sleeved outside the rotating column 21, one end of the rotating spring 22 is fixedly connected with the clamping frame 4, and the other end of the rotating spring 22 is rotatably connected with the limiting frame 20. The adjusting frame 2 is rotatably connected with the abutting rod 15 at the upper end, the abutting rod 15 is rotatably connected with the adjusting wheel 19 at the end, the adjusting frame 2 is fixedly connected with the torsional spring 16 at the upper end, and the torsional spring 16 is fixedly connected with the abutting rod 15 at the end. The abutting rod 15 is fixedly connected with the driving motor 17 on the outer surface, and the output end of the driving motor 17 and the outer side of the adjusting wheel 19 are both provided with the belt 18.

[0040] When the clamping frame 4 clamps the welding ball, the bidirectional screw rod 10 is driven to rotate by starting the clamping motor 11, so that the two clamping rods 3 drive the clamping frame 4 to move from both sides to the middle, at this time the limiting frame 20 inside the clamping frame 4 will be fixed from both sides to the welding ball, and with the clamping process, the rotating column 21 will move to the inside of the clamping rod 3, and the rotating spring 22 will be stretched and compressed, which allows the welding ball to be fixed while the rotating column 21 and the rotating spring 22 cannot move the limiting frame 20 and the welding ball. When the welding position on the welding ball needs to be switched, the bidirectional screw rod 10 is driven to rotate in the opposite direction by starting the clamping motor 11, so that the two clamping rods 3 move in the opposite direction, so that the clamping frame 4 slightly moves away from both sides of the welding ball, so that the rotating spring 22 resets the limiting frame 20 to fix the welding ball on both sides, and the contact rod 15 is always driven by the adjusting wheel 19 to rotate the welding ball by the continuous pushing of the torsional spring 16, the welding ball is limited by the three adjusting wheel 19 and two limiting frames 20, which loosens the rotating column 21 and the rotating spring 22 so that it can rotate, so that the welding ball can rotate with the rotating of the adjusting wheel 19, then the driving motor 17 is started to drive the belt 18 to rotate and drive the adjusting wheel 19 to rotate, so that the adjusting wheel 19 drives the welding ball to rotate, when the next welding point of the rotating welding ball corresponds to the steel pipe, stop the driving motor 17 to keep the current position of the welding ball, then move the clamping rod 3 to the opposite direction to fix the welding ball so that it does not rotate again, which reduces the difficulty of manual position adjustment, can be adjusted to a certain extent. Degree of automation, reduces the inconvenience of manual adjustment of multiple different welding positions, improves the convenience of the device in the ball node steel pipe welding process.

[0041] Working principle: when the device is used for welding the ball joint steel pipe rod, first, the welding ball is placed inside the two clamping frames 4, then the clamping motor 11 is started to drive the bidirectional screw rod 10 to rotate, so that the two clamping rods 3 drive the clamping frames 4 to move from both sides to the welding ball for fixation, then the steel pipe is placed between the clamping plates 8 installed at the upper end of the placement table 7, then the steel pipe is pressed to fit the inside of the clamping plate 8 and move downward, when the steel pipe is pressed, the rotating wheels 9 on both sides are squeezed, which makes the two clamping plates 8 move in opposite directions along the sliding column 13 and squeeze the limiting spring 14 on the sliding column 13 to shrink, until the steel pipe moves to the bottom of the clamping plate 8 and no longer squeezes the rotating wheel 9, at this time, the limiting spring 14 resets to push the clamping plate 8 to move along the sliding column 13 and limit the steel pipe from both sides, then the tail of the steel pipe is pushed to make its end fit the surface of the welding ball, or the end of the steel pipe is inserted into the welding groove reserved in the welding ball, further welding the connection between the welding ball and the steel pipe from both sides through the two welding heads 6, and after the preliminary welding of the welding ball and the steel pipe, the rotating motor 5 is started to drive the adjusting frame 2 to rotate, thereby driving the welding ball in the middle of the clamping frame 4 to rotate, when the welding ball rotates, it also drives the steel pipe preliminarily welded on its surface to rotate, the rotating wheel 9 facilitates the rotation of the steel pipe when it is limited, at the same time, the clamping plate 8 can limit the displacement of the steel pipe to make the steel pipe more conform to the adjustment angle required in the welding process of the ball joint, at this time, the welding head 6 is started to continue welding while the welding ball and the steel pipe are rotating, so that the welding head 6 can automatically circumferentially weld the connection between the steel pipe and the welding ball during welding, so that the existing device can weld the steel pipe and the welding ball without manual adjustment of the welding ball, and can complete the tight welding between the steel pipe and the welding ball, which not only improves the welding efficiency of the device when welding the welding ball, but also enables automatic welding to reduce manual participation and reduce labor consumption;

[0042] When the clamping frame 4 clamps the welding ball, the bidirectional screw rod 10 is driven to rotate by starting the clamping motor 11, so that the two clamping rods 3 drive the clamping frame 4 to move from both sides to the middle, at this time the limiting frame 20 inside the clamping frame 4 will be fixed from both sides to the welding ball, and with the clamping process, the rotating column 21 moves to the inside of the clamping rod 3, and the rotating spring 22 is stretched and compressed, which fixes the welding ball while the rotating column 21 and the rotating spring 22 cannot move the limiting frame 20 and the welding ball. When the welding position on the welding ball needs to be switched, the bidirectional screw rod 10 is driven to rotate in the opposite direction by starting the clamping motor 11, so that the two clamping rods 3 move in the opposite direction, so that the clamping frame 4 slightly moves away from both sides of the welding ball, so that the rotating spring 22 resets the limiting frame 20 to fix the welding ball on both sides, and the contact rod 15 is always driven by the adjusting wheel 19 to rotate the welding ball by the continuous pushing of the torsional spring 16. The welding ball is limited by the three adjusting wheels 19 and the two limiting frames 20, which loosens the rotating column 21 and the rotating spring 22 so that they can rotate, and the welding ball can rotate with the rotating of the adjusting wheel 19. Then the drive motor 17 is started to drive the belt 18 to rotate, so that the adjusting wheel 19 is driven to rotate, so that the adjusting wheel 19 drives the welding ball to rotate. When the next welding point of the rotating welding ball corresponds to the steel pipe, stop the drive motor 17 to keep the current position of the welding ball, and then move the clamping rod 3 to the opposite side to fix the welding ball so that it does not rotate. When the device adjusts the welding position, it reduces the difficulty of manual position adjustment, can be automatically adjusted to a certain extent, reduces the inconvenience of manual adjustment of multiple different welding positions, and improves the convenience of the device in the ball node steel pipe welding process.

[0043] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A kind of ball node steel pipe railing automatic welding device, including machine body (1), it is characterized in that: The upper end of the machine body (1) is fixedly connected with a placing table (7), the upper end of the machine body (1) is fixedly connected with a rotating motor (5), the output end of the rotating motor (5) penetrates through the machine body (1) and is fixedly connected with an adjusting frame (2), the adjusting frame (2) is slidably connected with a clamping rod (3), the end of the clamping rod (3) is fixedly connected with a clamping frame (4), both sides of the machine body (1) are provided with a welding head (6), and the adjusting frame (2) and the clamping frame (4) are provided with an adjusting structure.

2. The ball joint steel pipe railing automatic welding device according to claim 1, characterized in that: The adjusting structure comprises a clamping motor (11) fixedly connected to one end of the adjusting frame (2), a bidirectional screw rod (10) fixedly connected to the telescopic end of the clamping motor (11) and penetrating through the adjusting frame (2), and the bidirectional screw rod (10) is rotatably connected with the adjusting frame (2), and the clamping rod (3) is threadedly connected with the bidirectional screw rod (10).

3. The ball joint steel pipe railing automatic welding device according to claim 2, characterized in that: The adjusting frame (2) is fixedly connected with a guide column (12) inside, and the outer surface of the guide column (12) is slidably connected with the clamping rod (3).

4. The ball joint steel pipe railing automatic welding device according to claim 2, characterized in that: The upper end of the placing table (7) is slidably connected with a sliding column (13), the end of the sliding column (13) is fixedly connected with a clamping plate (8), and the inside of the clamping plate (8) is provided with an arc-shaped groove.

5. The ball joint steel pipe railing automatic welding device according to claim 4, characterized in that: The outer side of the sliding column (13) is provided with a limiting spring (14), the two ends of the limiting spring (14) are fixedly connected with the placing table (7) and the clamping plate (8) respectively, and a plurality of rotating wheels (9) are rotatably connected in the clamping plate (8).

6. The ball joint steel pipe railing automatic welding device according to claim 4, characterized in that: The inside of the clamping frame (4) is slidably connected with a rotating column (21), the end of the rotating column (21) is fixedly connected with a limiting frame (20), the outer side of the rotating column (21) is provided with a rotating spring (22), one end of the rotating spring (22) is fixedly connected with the clamping frame (4), and the other end of the rotating spring (22) is rotatably connected with the limiting frame (20).

7. The ball joint steel pipe railing automatic welding device according to claim 6, characterized in that: The upper end of the adjusting frame (2) is rotatably connected with a resisting rod (15), the end of the resisting rod (15) is rotatably connected with an adjusting wheel (19), the upper end of the adjusting frame (2) is fixedly connected with a torsional spring (16), and the end of the torsional spring (16) is fixedly connected with the resisting rod (15).

8. The ball joint steel pipe railing automatic welding device according to claim 7, characterized in that: The outer surface of the resisting rod (15) is fixedly connected with a driving motor (17), and the output end of the driving motor (17) and the outer side of the adjusting wheel (19) are provided with a belt (18).

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