Automatic welding device for one-side end cover of pipeline

CN224750429UActive Publication Date: 2026-09-15FOSHAN YIDE HONGYANG AUTOMATION TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202521838162.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-28
Publication Date
2026-09-15
Estimated Expiration
2035-08-28

AI Technical Summary

Technical Problem

[0004]本实用新型提供了一种管道单侧端盖自动焊接装置,解决了现有技术中存在的产品质量瑕疵率高且焊接效率低的问题

Benefits of technology

[0011]This invention uses a positioning base to fix the first end of the tube to be welded, and an end cap positioning assembly to fix the second end of the tube to be welded. This ensures the stability of the tube and the end cap during welding, improving welding accuracy compared to manual fixing, and thus improving welding efficiency and quality. Furthermore, the end cap positioning assembly uses a positioning sleeve to press the edge of the end cap to be welded for fixation. This enhances the stability of the tube to be welded, preventing it from shaking during welding. The annular pressure generated by its structure ensures that the end cap is evenly and firmly pressed against the second end of the tube, contributing to improved welding accuracy and reduced product defect rate.

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Abstract

The utility model provides a kind of pipeline unilateral end cover automatic welding device, including welding torch, carousel, end cover positioning assembly and multiple positioning bases being located on carousel. Multiple positioning bases are along the circumferential interval of carousel First sliding rail is located on the circumferential outside of carousel and extends along the axial direction of carousel, first sliding block is slidably connected to first sliding rail, positioning sleeve is located in first sliding block, and can move between the position of pressing and non-pressing with first sliding block. When positioning sleeve is in the position of pressing, one end of positioning sleeve abuts on the circumferential edge of the end cover to be welded. When welding, the first end of the pipe to be welded is fixed to the positioning base, the end cover to be welded is arranged on the second end of the pipe to be welded, the positioning sleeve is in the position of pressing, and the welding torch moves around the circumference of the end cover to be welded to weld the end cover to be welded to the second end of the pipe to be welded. The problem of high product quality defect rate and low welding efficiency in the prior art is solved.
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Description

Technical Field

[0001] This utility model relates to the field of pipe welding, and in particular to an automatic welding device for a single-sided end cap of a pipe. Background Technology

[0002] End cap welding is a process that welds the cap plate to the end face of the pipe as a whole. It requires both a tight seal and a smooth appearance. In existing technology, a positioning device can be used to fix the bottom of the pipe, and then welding can be performed on the top of the pipe. The welder can maintain the stability of the pipe by holding the pipe section close to the top. However, this requires extremely high technical skills from the welder, and it is also difficult to avoid shaking during the welding process, resulting in a high product quality defect rate and low efficiency.

[0003] It is evident that existing technologies suffer from high product quality defect rates and low welding efficiency. Utility Model Content

[0004] This invention provides an automatic welding device for single-sided pipe end caps, which solves the problems of high product quality defect rate and low welding efficiency in the prior art.

[0005] This utility model provides an automatic welding device for a single-sided pipe end cap, including a welding gun, a turntable, an end cap positioning assembly, and multiple positioning bases disposed on the turntable;

[0006] Multiple positioning bases are spaced apart along the circumference of the turntable.

[0007] The end cap positioning assembly includes a first slide rail, a first slider, and a positioning sleeve.

[0008] The first slide rail is located on the outer circumference of the turntable and extends along the axial direction of the turntable. The first slider is slidably connected to the first slide rail. The positioning sleeve is located on the first slider and can move with the first slider between the pressing position and the non-pressing position.

[0009] When the positioning sleeve is in the clamping position, one end of the positioning sleeve abuts against the circumferential edge of the end cap to be welded.

[0010] During welding, the first end of the tube to be welded is fixed to the positioning base, the end cap to be welded is placed on the second end of the tube to be welded, the positioning sleeve is in the pressing position, and the welding torch moves around the circumference of the end cap to be welded in order to weld the end cap to be welded to the second end of the tube to be welded.

[0011] This invention uses a positioning base to fix the first end of the tube to be welded, and an end cap positioning assembly to fix the second end of the tube to be welded. This ensures the stability of the tube and the end cap during welding, improving welding accuracy compared to manual fixing, and thus improving welding efficiency and quality. Furthermore, the end cap positioning assembly uses a positioning sleeve to press the edge of the end cap to be welded for fixation. This enhances the stability of the tube to be welded, preventing it from shaking during welding. The annular pressure generated by its structure ensures that the end cap is evenly and firmly pressed against the second end of the tube, contributing to improved welding accuracy and reduced product defect rate.

[0012] Optionally, the end cap positioning assembly also includes a limiting shaft, which is located within the positioning sleeve and can move vertically between a target position and a non-target position under the action of an external force. The target position is configured such that one end of the limiting shaft abuts against the top of the end cap to be welded. During welding, the limiting shaft is in the target position.

[0013] This utility model embodiment uses a limiting shaft that can pass through the positioning sleeve and abut against the top of the end cap to be welded during welding, which further improves the stability of the pipe to be welded and prevents it from shaking during the welding process. In addition, it further improves the firmness and stability of the end cap to be welded when it is placed at the second end of the pipe to be welded, thereby improving the welding reliability.

[0014] Optionally, the positioning base includes a positioning shaft and a clamping assembly. The positioning shaft includes a bushing and a spindle. The first end of the bushing is mounted on the turntable, and the spindle is inserted into the second end of the bushing and can move along the axial direction of the bushing so that the cross-section of the bushing expands or contracts radially.

[0015] The clamping assembly is located on the circumferential outer side of the bushing. During welding, the pipe wall at the first end of the pipe to be welded is inserted between the clamping assembly and the bushing.

[0016] This utility model embodiment can change the cross-section of the bushing by cooperating with the shaft, thereby changing the distance between the outer wall of the bushing and the clamping component, so that the positioning base can use different pipe wall sizes, thus expanding the applicability of the automatic welding device for single-sided pipe end caps in this utility model embodiment.

[0017] Optionally, the second end of the bushing has multiple grooves distributed along the circumferential direction of the bushing, and the sidewalls of the grooves extend along the axial direction of the bushing.

[0018] Optionally, the clamping assembly includes a first clamping plate and a second clamping plate, which are symmetrically arranged on both sides of the bushing. During welding, the outer wall of the tube to be welded abuts against the side surface of the first clamping plate and the side surface of the second clamping plate, and the inner wall of the tube to be welded abuts against the outer wall of the bushing.

[0019] Optionally, the first clamping plate is slidably connected to the turntable, and / or the second clamping plate is slidably connected to the turntable, so that the first clamping plate and the second clamping plate can move towards each other or away from each other along the radial direction of the positioning axis.

[0020] This utility model embodiment provides another implementation method for changing the distance between the outer wall of the bushing and the clamping assembly by slidingly connecting the first clamping plate and / or the second clamping plate to the turntable, so that the positioning base can use different pipe wall sizes, expanding the application range of the automatic pipe single-side end cap welding device of this utility model embodiment, and providing a variety of pipe fixing methods for the welding process to adapt to different application scenarios.

[0021] Optionally, the automatic welding device for single-sided pipe end caps also includes a pipe segment positioning assembly. The pipe segment positioning assembly includes a second slide rail, a second slider, and a clamp.

[0022] The second slide rail is located on the outer circumference of the turntable and extends along the axial direction of the turntable. The second slider is slidably connected to the second slide rail. The clamp is located on the second slider and can move up and down along the axial direction of the turntable along with the second slider. The clamp is used to hold the wall of the pipe to be welded.

[0023] This embodiment of the invention can further improve the stability of the pipe to be welded during the welding process by using a pipe segment positioning component, avoiding shaking during the welding process, and thus further improving the welding accuracy.

[0024] Optionally, the clamp is a pincer clamp with an opening angle of 0 to 180°.

[0025] When the clamp angle is 180°, it can avoid interference with multiple tubes to be welded on the turntable when the turntable rotates, ensuring the smoothness and safety of the welding process and improving welding efficiency.

[0026] Optionally, the first slide rail can be reused as the second slide rail.

[0027] Optionally, the automatic welding device for single-sided pipe end caps may also include an end cap detection assembly;

[0028] The end cap detection assembly includes a mounting bracket and a laser rangefinder. The mounting bracket is located on the outer circumference of the turntable, and the laser rangefinder is mounted on the mounting bracket. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the automatic welding device for single-sided pipe end caps according to an embodiment of the present utility model;

[0030] Figure 2 This is a three-dimensional structural diagram of the end cap positioning component in the automatic welding device for single-sided pipe end caps according to an embodiment of this utility model;

[0031] Figure 3This is a three-dimensional structural diagram of the positioning base in the automatic welding device for single-sided pipe end caps according to an embodiment of this utility model;

[0032] Figure 4 This is a three-dimensional structural diagram of the pipe section positioning component in the automatic welding device for single-sided pipe end caps according to an embodiment of this utility model;

[0033] Figure 5 This is a three-dimensional structural diagram of the end cap detection component in the automatic welding device for single-sided pipe end caps according to an embodiment of this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Automatic welding device for single-sided pipe end caps;

[0036] 101. Welding torch; 102. Turntable;

[0037] 11. Positioning base; 110. Mounting seat; 111. Positioning shaft; 112. Bushing; 1120. Groove; 113. Shaft; 114. Clamping assembly; 1141. First clamping plate; 1142. Second clamping plate;

[0038] 12. End cap positioning assembly; 121. First slide rail; 122. First slider; 123. Positioning sleeve; 124. Limiting shaft; 125. Output shaft; 126. Output shaft; 127. Output shaft;

[0039] 13. Pipe segment positioning assembly; 132. Second slide rail; 133. Second slider; 134. Clamp;

[0040] 14. End cap detection assembly; 141. Mounting bracket; 142. Laser rangefinder; 143. Laser;

[0041] 21. Pipe to be welded; 22. End cap to be welded. Detailed Implementation

[0042] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0043] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0045] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0046] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0047] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0048] Please see Figure 1 and Figure 2 This utility model provides an automatic welding device 1 for a single-sided pipe end cap, including a welding torch 101, a turntable 102, an end cap positioning assembly 12, and multiple positioning bases 11 disposed on the turntable 102.

[0049] Multiple positioning bases 11 are arranged at intervals along the circumference of the turntable 102.

[0050] End cap positioning assembly 12 includes a first slide rail 121 (e.g. Figure 1 As shown), the first slider 122 and the positioning sleeve 123.

[0051] The first slide rail 121 is located on the outer circumferential side of the turntable 102 and extends along the axial direction of the turntable 102. Alternatively, the first slide rail 121 can be understood as extending vertically. The first slider 122 is slidably connected to the first slide rail 121. The positioning sleeve 123 is located on the first slider 122 and can move with the first slider 122 between the pressed position and the unpressed position. When the positioning sleeve 123 is in the pressed position, one end of the positioning sleeve 123 (or the end facing the turntable 102) abuts against the circumferential edge of the end cap 22 to be welded.

[0052] During welding, the first end of the tube 21 to be welded is fixed to the positioning base 11, the end cap 22 to be welded is placed on the second end of the tube 21 to be welded, the positioning sleeve 123 is in the pressing position, and the welding gun 101 moves around the end cap 22 to weld the end cap 22 to the second end of the tube 21 to be welded.

[0053] Those skilled in the art will understand that the turntable 102 can be driven to rotate about its axis, and the driving source can be, for example, a cylinder drive, an electric motor drive, a hydraulic drive, etc.

[0054] The shape of the tube 21 to be welded is not limited. For example, it can be a round tube. In other alternative embodiments, it can also be a square tube. Correspondingly, the end cap 22 to be welded can be a round cap or a rectangular cap.

[0055] The number of positioning bases 11 is not limited; in one embodiment, there are twelve positioning bases 11. The twelve positioning bases 11 are evenly distributed on the circumferential edge of the turntable 102.

[0056] This invention uses a positioning base 11 to fix the first end of the tube 21 to be welded, and an end cap 22 to be welded, located at the second end of the tube 21, to be fixed by an end cap positioning assembly 12. This ensures the stability of the tube 21 and the end cap 22 during welding, improving welding accuracy compared to manual fixing, thereby increasing welding efficiency and quality. Furthermore, the end cap positioning assembly 12 uses a positioning sleeve 123 to press and fix the edge of the end cap 22. This strengthens the stability of the tube 21 to be welded, preventing it from shaking during welding. The annular pressure generated by its structure ensures that the end cap 22 is evenly and stably and firmly pressed against the second end of the tube 21, which helps improve welding accuracy and reduce product defect rate.

[0057] In a further implementation, such as Figure 2 As shown, the end cap positioning assembly 12 also includes a limiting shaft 124, which is disposed within the positioning sleeve 123. The limiting shaft 124 can move vertically between a target position and a non-target position under the action of an external force. The target position is configured such that one end of the limiting shaft 124 (which can be understood as the end facing the turntable 102) abuts against the top of the end cap 22 to be welded. During welding, the limiting shaft 124 is in the target position.

[0058] In this embodiment of the utility model, the limiting shaft 124 can pass through the positioning sleeve 123 and abut against the top of the end cap 22 to be welded during welding, which further improves the stability of the tube 21 to be welded and prevents it from shaking during the welding process. In addition, it further improves the firmness and stability of the end cap 22 to be welded when it is set at the second end of the tube 21 to be welded, and improves the welding reliability.

[0059] In one embodiment, both the positioning sleeve 123 and the limiting shaft 124 are driven by a drive cylinder, and are respectively connected to three different output shafts of the drive cylinder. Specifically, in this embodiment, the positioning sleeve 123 is connected to output shafts 125 and 127, and the limiting shaft 124 is connected to output shaft 126. In other alternative embodiments, other driving methods may also be used.

[0060] Furthermore, in one implementation, please refer to Figure 3 The positioning base 11 includes a positioning shaft 111 and a clamping assembly 114. The positioning shaft 111 includes a bushing 112 and a shaft 113. The first end of the bushing 112 is mounted on the turntable 102, and the shaft 113 is inserted into the second end of the bushing 112 and can move along the axial direction of the bushing 112 so that the cross-section of the bushing 112 expands or shrinks radially.

[0061] The clamping assembly 114 is located on the circumferential outer side of the bushing 112. During welding, the pipe wall of the first end of the pipe 21 to be welded is inserted between the clamping assembly 114 and the bushing 112.

[0062] In one embodiment, the turntable 102 is provided with multiple mounting seats 110, and the positioning shaft 111 and the clamping assembly 114 are disposed on the corresponding mounting seats 110. The second end of the bushing 112 is a deformable structure; in one embodiment, it can be a hard silicone or a hard spring with deformability; in another embodiment, such as... Figure 3 As shown, the second end of the bushing 112 has a plurality of grooves 1120, which are distributed along the circumferential direction of the bushing 112, and the sidewalls of the grooves 1120 extend along the axial direction of the bushing 112. The grooves 1120 can also be understood as narrow slits along the axial direction of the bushing 112, which do not penetrate the first end of the bushing 112. The shaft 113 can be, for example, a pin, a pivot pin, etc.

[0063] This utility model embodiment can change the cross-section of the bushing 112 by cooperating with the shaft 113, thereby changing the distance between the outer wall of the bushing 112 and the clamping assembly 114, so that the positioning base 11 can use different pipe wall sizes, thus expanding the applicability of the automatic welding device 1 for single-sided pipe end caps in this utility model embodiment.

[0064] For further implementation methods, please refer to Figure 3 The clamping assembly 114 includes a first clamping plate 1141 and a second clamping plate 1142, which are symmetrically arranged on both sides of the bushing 112. During welding, the outer wall of the tube 21 to be welded abuts against the side surfaces of the first clamping plate 1141 and the second clamping plate 1142, and the inner wall of the tube 21 to be welded abuts against the outer wall of the bushing 112. In one exemplary embodiment, both the first clamping plate 1141 and the second clamping plate 1142 are L-shaped.

[0065] In one embodiment, the first clamping plate 1141 is slidably connected to the turntable 102, and / or the second clamping plate 1142 is slidably connected to the turntable 102, so that the first clamping plate 1141 and the second clamping plate 1142 can move towards each other or away from each other along the radial direction of the positioning shaft 111.

[0066] The first clamping plate 1141 is slidably connected to the turntable 102, and / or the second clamping plate 1142 is slidably connected to the turntable 102. This can be understood as three parallel embodiments, such as the first clamping plate 1141 being slidably connected to the turntable 102 and the second clamping plate 1142 being fixed, or the second clamping plate 1142 being slidably connected to the turntable 102 and the first clamping plate 1141 being fixed, or both the first clamping plate 1141 and the second clamping plate 1142 being slidably connected to the turntable 102.

[0067] In a specific embodiment, taking the sliding connection of the first clamping plate 1141 as an example, the first clamping plate 1141 is provided with a waist-shaped hole on the side near the mounting base 110. The waist-shaped hole extends radially along the bushing 112. The mounting base 110 is provided with a mounting post, which passes through the waist-shaped hole. The first clamping plate 1141 can slide along the mounting post through the waist-shaped hole. The first clamping plate 1141 can be fixed in a set position by a nut.

[0068] This utility model embodiment provides another implementation method for changing the distance between the outer wall of the bushing 112 and the clamping assembly 114 by slidingly connecting the first clamping plate 1141 and / or the second clamping plate 1142 to the turntable 102. This allows the positioning base 11 to use different pipe wall sizes, expands the applicability of the automatic pipe single-side end cap welding device 1 of this utility model embodiment, and provides a variety of pipe fixing methods for the welding process to adapt to different application scenarios.

[0069] For further details, please see Figure 4 and combined Figure 1 It is understood that the automatic welding device 1 for single-sided pipe end caps also includes a pipe segment positioning assembly 13. The pipe segment positioning assembly 13 includes a second slide rail 132, a second slider 133, and a clamp 134.

[0070] The second slide rail 132 is located on the outer circumferential side of the turntable 102 and extends along the axial direction of the turntable 102. The second slider 133 is slidably connected to the second slide rail 132. The clamp 134 is located on the second slider 133 and can move up and down along the axial direction of the turntable 102 following the second slider 133. The clamp 134 is used to clamp the wall of the pipe 21 to be welded.

[0071] In one embodiment, the aforementioned first slide rail 121 is reused as a second slide rail 132. The first slider 122 and the second slider 133 can slide on different sections of the first slide rail 121, respectively.

[0072] This embodiment of the utility model can further improve the stability of the pipe 21 to be welded during the welding process by using the pipe segment positioning component 13, and avoid it from shaking during the welding process, thus further improving the welding accuracy.

[0073] In one implementation, such as Figure 4 As shown, the clamp 134 is a clamp-shaped clamp with an opening angle of 0 to 180°. When the opening angle of the clamp is 180°, it can avoid interference with the multiple tubes 21 to be welded on the turntable 102 when the turntable 102 rotates, ensuring the smoothness and safety of the welding process and improving welding efficiency.

[0074] For further details, please see Figure 5 and combined Figure 1 It is understood that the automatic welding device for single-sided pipe end caps 1 also includes an end cap detection component 14.

[0075] The end cap detection assembly 14 includes a mounting bracket 141 and a laser rangefinder 142. The mounting bracket 141 is located on the outer circumferential side of the turntable 102, and the laser rangefinder 142 is mounted on the mounting bracket 141.

[0076] The laser rangefinder 142 emits a laser 143 towards the inside of the pipe 21 to be welded. If the end cap 22 to be welded is not placed at the second end of the pipe 21, the laser 143 will penetrate the entire pipe, resulting in a larger distance measurement value. If the end cap 22 to be welded is placed at the second end of the pipe 21, the laser distance measurement result is the distance between the laser rangefinder 142 and the top of the pipe 21, which is a smaller distance measurement value. Therefore, by setting a threshold for the distance measurement value, it can be determined whether the end cap 22 to be welded is placed at the second end of the pipe 21. If the distance measurement value exceeds the threshold, an alarm can be triggered.

[0077] For an example of the working process, please refer to Figures 1-5 The process begins with fixing the pipe 21 to be welded onto the turntable 102 using the positioning base 11. Then, the end cap 22 to be welded is placed on the turntable. The end cap detection component 14 detects the end cap 22. If the detection is normal, the turntable 102 rotates to position the pipe 21 and end cap 22 to the welding position. The positioning sleeve 123 is then lowered to the clamping position, and the limiting shaft 124 is moved to the target position. The middle section of the pipe 21 is clamped by the pipe segment positioning component 13. Finally, the welding torch 101 rotates circumferentially around the end cap 22 to perform welding. After welding, the turntable 102 rotates to perform the next stage of fixing and welding.

[0078] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An automatic welding device for single-sided pipe end caps, characterized in that, It includes a welding torch, a turntable, an end cap positioning assembly, and multiple positioning bases disposed on the turntable; The plurality of positioning bases are arranged at intervals along the circumference of the turntable; The end cap positioning assembly includes a first slide rail, a first slider, and a positioning sleeve; The first slide rail is located on the circumferential outer side of the turntable and extends along the axial direction of the turntable. The first slider is slidably connected to the first slide rail. The positioning sleeve is located on the first slider and can follow the first slider between the pressing position and the non-pressing position. When the positioning sleeve is in the clamping position, one end of the positioning sleeve abuts against the circumferential edge of the end cap to be welded; During welding, the first end of the tube to be welded is fixed to the positioning base, the end cap to be welded is placed on the second end of the tube to be welded, the positioning sleeve is in the pressing position, and the welding torch moves around the end cap to be welded in the circumference to weld the end cap to the second end of the tube to be welded.

2. The automatic welding device for single-sided pipe end caps according to claim 1, characterized in that, The end cap positioning assembly further includes a limiting shaft, which is disposed inside the positioning sleeve. The limiting shaft can move vertically between a target position and a non-target position under the action of an external force. The target position is configured such that one end of the limiting shaft abuts against the top of the end cap to be welded. During welding, the limiting shaft is in the target position.

3. The automatic welding device for single-sided pipe end caps according to claim 1, characterized in that, The positioning base includes a positioning shaft and a clamping assembly. The positioning shaft includes a bushing and a shaft center. The first end of the bushing is mounted on the turntable, and the shaft center is inserted into the second end of the bushing and can move along the axial direction of the bushing so that the cross-section of the bushing expands or shrinks radially. The clamping assembly is located on the circumferential outer side of the bushing. During welding, the pipe wall of the first end of the pipe to be welded is inserted between the clamping assembly and the bushing.

4. The automatic welding device for single-sided pipe end caps according to claim 3, characterized in that, The second end of the bushing has a plurality of grooves, which are distributed along the circumferential direction of the bushing, and the sidewalls of the grooves extend along the axial direction of the bushing.

5. The automatic welding device for single-sided pipe end caps according to claim 3, characterized in that, The clamping assembly includes a first clamping plate and a second clamping plate, which are symmetrically arranged on both sides of the bushing. During welding, the outer wall of the tube to be welded abuts against the side surface of the first clamping plate and the side surface of the second clamping plate, and the inner wall of the tube to be welded abuts against the outer wall of the bushing.

6. The automatic welding device for single-sided pipe end caps according to claim 5, characterized in that, The first clamping plate is slidably connected to the turntable, and / or the second clamping plate is slidably connected to the turntable, so that the first clamping plate and the second clamping plate can move towards each other or away from each other along the radial direction of the positioning axis.

7. The automatic welding device for single-sided pipe end caps according to claim 1, characterized in that, It also includes a pipe segment positioning assembly; the pipe segment positioning assembly includes a second slide rail, a second slider, and a clamp. The second slide rail is located on the outer circumferential side of the turntable and extends along the axial direction of the turntable. The second slider is slidably connected to the second slide rail. The clamp is located on the second slider and can move up and down along the axial direction of the turntable following the second slider. The clamp is used to hold the wall of the pipe to be welded.

8. The automatic welding device for single-sided pipe end caps according to claim 7, characterized in that, The clamp is a pincer-shaped clamp with an opening angle of 0 to 180°.

9. The automatic welding device for single-sided pipe end caps according to claim 7, characterized in that, The first slide rail is reused as the second slide rail.

10. The automatic welding device for single-sided pipe end caps according to claim 1, characterized in that, It also includes an end cap detection component; The end cap detection assembly includes a mounting bracket and a laser rangefinder. The mounting bracket is located on the outer circumferential side of the turntable, and the laser rangefinder is mounted on the mounting bracket.