Welding torch clamping mechanism of automatic pipeline welding robot

Abstract

The utility model provides an automatic pipeline welding robot welding torch clamping mechanism which comprises a clamping support provided with a first through hole and a second through hole which are communicated, two locking pins symmetrically arranged in the second through hole and provided with locking ends and a driving assembly used for driving the two locking pins to move along the second through hole, and the two locking ends are exposed in the first through hole. When the driving assembly drives the two locking pins to get close to each other, the two locking ends apply symmetrical extrusion force with the same size to the welding torch arranged in the first through hole, so that clamping of the welding torch is completed, compared with the prior art, by applying the symmetrical extrusion force to the welding torch, the uniformity of the clamping force is improved, deflection of the welding torch is avoided, and the welding torch clamping efficiency is improved. And therefore, the clamping stability is improved.

Description

Technical Field

[0001] This application relates to the field of pipeline welding technology, specifically to a welding torch clamping mechanism for an automatic pipeline welding robot. Background Technology

[0002] Automated pipeline welding robots are widely used in welding operations in fields such as oil and gas pipelines, ships, and steel structures. The welding torch is one of the core execution components of the automated pipeline welding robot. During the welding process, it is responsible for conducting current, delivering welding materials, and controlling the generation and stable combustion of the electric arc. Its working state directly affects the quality of the weld. The welding torch clamping mechanism, as a key component connecting the welding torch and the automated pipeline welding robot, plays a crucial role. It must not only ensure that the welding torch maintains a stable posture during the robot's movement but also flexibly control the torch's oscillation, enabling it to perform welding operations precisely within the working area.

[0003] Patent CN219026419U discloses a torch clamping mechanism for an all-position pipeline welding machine, including a torch locking assembly, a torch quick-release assembly, and a torch angle adjustment assembly. The torch locking assembly uses a handle to drive a locking bolt forward, forcing the torch jacket to retract. Anti-wear blocks and spring retaining rings clamp the torch, and a locking nut provides a rigid constraint. However, the jacket is only clamped by the bolt on one side, resulting in asymmetrical force on the torch and a tendency to shift under long-term vibration. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide a welding torch clamping mechanism for an automatic pipeline welding robot, comprising:

[0005] A clamping bracket has a first through hole and a second through hole that are connected. The directions of the extended axes of the first through hole and the second through hole are a first direction and a second direction, respectively. The first direction and the second direction are perpendicular to each other. The first through hole is used to install a welding torch.

[0006] A locking assembly, comprising two locking pins disposed in the second through hole, the two locking pins being symmetrically arranged, each locking pin having a locking end near the end of the first through hole;

[0007] A driving assembly is provided for driving the two locking pins to move closer to or further apart from each other. When the two locking pins move closer to each other, the two locking ends apply equal dispersive forces along a third direction to the welding torch. The third direction points along the second through hole to the first through hole and is perpendicular to the first direction and the second direction.

[0008] According to the technical solution provided in the embodiments of this application, each of the locking pins has a threaded hole, the two threaded holes have opposite directions of rotation and equal pitch; the driving assembly includes a locking bolt passing through the two threaded holes, the outer wall of the locking bolt having external threads that mate with the two threaded holes; it also includes a limiting assembly, which is used to limit the rotation of the locking pins when the driving assembly drives the two locking pins to move.

[0009] According to the technical solution provided in the embodiments of this application, the limiting component includes a limiting groove disposed on the inner wall of the second through hole, the extending direction of the limiting groove is the second direction, and the outer wall of each locking pin is provided with a limiting member that matches the limiting groove.

[0010] According to the technical solution provided in the embodiments of this application, the locking end has a curved surface that matches the outer wall of the welding torch.

[0011] According to the technical solution provided in the embodiments of this application, it further includes a first anti-detachment component, which is used for the locking bolt and the locking pin to be dislodged from the second through hole.

[0012] According to the technical solution provided in the embodiments of this application, the first anti-detachment component includes a first disc disposed at one end of the locking bolt and a second disc sleeved on the other end of the locking bolt and threadedly connected thereto. The first disc and the second disc are respectively placed on the outer side of the clamping bracket along the second direction.

[0013] According to the technical solution provided in the embodiments of this application, the second disk is provided with a second anti-disengagement component on the side away from the clamping bracket, and the second anti-disengagement component is used to prevent the second disk from disengaging from the locking bolt.

[0014] According to the technical solution provided in the embodiments of this application, the second disk is provided with a splash guard on the side near the first disk, and the splash guard is used to prevent welding slag from entering the second through hole.

[0015] According to the technical solution provided in the embodiments of this application, the outer wall of the locking bolt is treated with an electrophoresis process.

[0016] According to the technical solution provided in the embodiments of this application, the inner diameter of the threaded hole of the locking pin near the first disk is larger than the inner diameter of the threaded hole of the locking pin near the second disk.

[0017] In summary, this application proposes a welding torch clamping mechanism for an automatic pipeline welding robot, including a clamping bracket with a first through hole and a second through hole, two locking pins symmetrically disposed in the second through hole with locking ends, and a driving assembly for driving the two locking pins to move along the second through hole. The two locking ends are exposed in the first through hole. When the driving assembly drives the two locking pins to move closer to each other, the two locking ends apply symmetrical and equal extrusion forces to the welding torch placed in the first through hole, thereby completing the welding torch clamping. Compared with the prior art, this application improves the uniformity of the clamping force by applying symmetrical extrusion forces to the welding torch, avoids welding torch deflection, and thus improves the stability of clamping. Attached Figure Description

[0018] The text labels in the image represent:

[0019] Figure 1 This is a schematic diagram of the structure of the welding torch clamping mechanism of the automatic pipe welding robot provided in the embodiments of this application;

[0020] Figure 2 An exploded view of the welding torch clamping mechanism of the automatic pipe welding robot provided in the embodiments of this application;

[0021] Figure 3 This is a schematic diagram of the structure of the clamping bracket provided in the embodiments of this application;

[0022] Figure 4 This is a schematic diagram of the locking pin provided in an embodiment of this application.

[0023] 1. Clamping bracket; 11. First through hole; 12. Second through hole; 13. Limiting groove; 2. Locking assembly; 21. Locking pin; 22. Limiting component; 23. Locking end; 3. Drive assembly; 31. Locking bolt; 32. Rotating handle; 41. First disc; 42. Second disc; 421. Anti-splash component; 5. Second anti-detachment assembly; 6. Welding torch. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] As mentioned in the background section, this application proposes a welding torch clamping mechanism for an automatic pipe welding robot, such as... Figures 1-4 As shown, it includes:

[0027] The clamping bracket 1 has a first through hole 11 and a second through hole 12 that are connected. The extended directions of the axes of the first through hole 11 and the second through hole 12 are respectively the first direction and the second direction. The first direction and the second direction are perpendicular. The first through hole 11 is used to install the welding torch 6.

[0028] Optionally, the first direction is the vertical direction, and the second direction is the direction parallel to the width of the clamping bracket 1.

[0029] Locking assembly 2 includes two locking pins 21 disposed in the second through hole 12. The two locking pins 21 are symmetrically arranged, and each locking pin 21 has a locking end 23 near the end of the first through hole 11.

[0030] Specifically, the clamping bracket 1 is symmetrical along a center line parallel to the length direction, and two locking pins 21 are placed on both sides of this center line, thus symmetrically arranged along this center line.

[0031] The driving component 3 is used to drive the two locking pins 21 to move closer or further apart. When the two locking pins 21 move closer together, the two locking ends 23 apply equal decomposition forces to the welding torch 6 along a third direction. The third direction points along the second through hole 12 to the first through hole 11 and is perpendicular to the first and second directions.

[0032] Specifically, since the first through hole 11 and the second through hole 12 are connected, the two locking ends 23 can be exposed in the first through hole 11 and contact the welding torch 6. The third direction is parallel to the length direction of the clamping bracket 1. By applying symmetrical extrusion force to the welding torch 6, the uniformity of the clamping force is improved, the welding torch 6 is prevented from deflecting, and thus the stability of the clamping is improved.

[0033] In a preferred embodiment, each locking pin 21 has a threaded hole with opposite directions of rotation and equal pitch; the drive assembly 3 includes a locking bolt 31 passing through the two threaded holes, the outer wall of the locking bolt 31 having external threads that mate with the two threaded holes; it also includes a limiting assembly, which is used to limit the rotation of the locking pin 21 when the drive assembly 3 drives the two locking pins 21 to move.

[0034] Specifically, two locking pins 21 are fitted over the locking bolt 31 and threadedly connected to it. The locking pins 21 have left-hand internal threads and right-hand internal threads respectively. The outer wall of the locking bolt 31 is correspondingly provided with left-hand external threads and right-hand external threads. When the locking bolt 31 rotates, the two locking pins 21 move in the second direction under the restriction of the limiting component.

[0035] In a preferred embodiment, the limiting component includes a limiting groove 13 disposed on the inner wall of the second through hole 12, the extending direction of the limiting groove 13 being the second direction, and the outer wall of each locking pin 21 being provided with a limiting member 22 that matches the limiting groove 13.

[0036] Specifically, the shapes of the limiting groove 13 and the limiting member 22 are not limited, as long as they match. Since the limiting member 22 is placed in the limiting groove 13, it restricts its rotation, and the locking pin 21 and the locking bolt 31 are threadedly connected, so when the locking bolt 31 rotates, it can drive the locking pin 21 to move axially. The limiting member 22 and the locking pin 21 can be integrally formed, or they can be fixed to the locking pin 21 by welding or plugging.

[0037] In a preferred embodiment, the locking end 23 has a curved surface that matches the outer wall of the welding torch 6.

[0038] Specifically, the locking end 23 is an arc-shaped cut, the radius of curvature of which matches the outer diameter of the area where the welding torch 6 is clamped. This increases the contact area between the welding torch 6 and the locking end 23 during clamping, reduces stress concentration, and improves clamping stability. The tolerance range is ±0.02mm to ±0.8mm.

[0039] In a preferred embodiment, the inner diameter of the threaded hole of the locking pin 21 near the first disc 41 is larger than the inner diameter of the threaded hole of the locking pin 21 near the second disc 42.

[0040] Specifically, the locking bolt 31 includes two parts with different outer diameters. The outer diameter of the side closer to the first disc 41 is larger than that of the side closer to the second disc 42. Since both locking pins 21 are threadedly connected to the locking bolt 31, the inner diameter of the threaded hole of the locking pin 21 closer to the first disc 41 is larger than that of the threaded hole of the locking pin 21 closer to the second disc 42.

[0041] In a preferred embodiment, a first anti-disengagement component is further included, which is used to prevent the bolt 31 and the locking pin 21 from disengaging from the second through hole 12. The first anti-disengagement component includes a first disc 41 disposed at one end of the locking bolt 31 and a second disc 42 sleeved on the other end of the locking bolt 31 and threadedly connected thereto. The first disc 41 and the second disc 42 are respectively positioned on the outer side of the clamping bracket 1 along the second direction.

[0042] Specifically, the outer diameters of the first disc 41 and the second disc 42 are larger than the inner diameter of the second through hole 12. The first disc 41 is fixedly connected to the locking bolt 31, and the second disc 42 is threadedly connected to the locking bolt 31. During assembly, first screw the locking pin 21 with the larger inner diameter of the threaded hole into the locking bolt 31 with the larger outer diameter, and then screw the locking pin 21 with the smaller inner diameter of the threaded hole into the locking bolt 31 with the smaller outer diameter. The two locking pins 21 are respectively screwed to the ends of the two external threads of the locking bolt 31 that are close to each other (this position is the initial position. When the locking bolt 31 with the locking pin 21 is installed in the clamping bracket 1, the two locking pins 21 in the initial position are symmetrical with respect to the center line of the clamping bracket 1). Then, the locking bolt 31 with the locking pin 21 is inserted into the second through hole 12 until the first disc 41 is close to the outer wall of the clamping bracket 1. Then, the second disc 42 is screwed onto the other end of the locking bolt 31 until the second disc 42 is close to the other side of the outer wall of the clamping bracket 1. In addition, a rotating handle 32 is provided at the end of the first disc 41 away from the second disc 42 to facilitate rotating the locking bolt 31.

[0043] In a preferred embodiment, a second anti-disengagement component 5 is provided on the side of the second disc 42 away from the clamping bracket 1. The second anti-disengagement component 5 is used to prevent the second disc 42 from disengaging from the locking bolt 31. Optionally, the second anti-disengagement component 5 is a retaining spring.

[0044] Specifically, after the second disc 42 is threadedly connected to the locking bolt 31, the retaining ring is embedded in the external thread of the locking bolt 31, and the retaining ring is tightly against the second disc 42 to prevent the second disc 42 from moving axially. The second disc 42 and the retaining ring form a double limit to prevent the locking pin 21 from coming out.

[0045] In a preferred embodiment, the second disk 42 is provided with a splash guard 421 on the side near the first disk 41. The splash guard 421 is used to prevent welding slag from entering the second through hole 12.

[0046] Specifically, the splash guard 421 is cylindrical, with one end fixed to the side of the second disk 42 near the first disk 41 and concentrically arranged with the second disk 42. The outer diameter of the splash guard 421 is slightly smaller than the inner diameter of the second through hole 12, and its outer wall is in close contact with the inner wall of the second through hole 12, so as to prevent welding slag from entering the second through hole 12 and causing the locking pin 21 to be unable to move.

[0047] In a preferred embodiment, the outer wall of the locking bolt 31 is treated with an electrophoresis process. Optionally, the outer wall of the locking bolt 31 is made of titanium alloy. Titanium alloy is more likely to adsorb welding slag, causing the welding slag to enter the second through hole 12 and block the second through hole. Therefore, the outer wall is treated with an electrophoresis process to prevent the adsorption of welding slag.

[0048] The operation process is as follows:

[0049] Screw the two locking pins 21 to their initial positions, insert the locking bolts 31 into the second through hole 12 of the clamping bracket 1, and install the first disc 41, the second disc 42 and the snap ring;

[0050] By rotating the handle counterclockwise, the locking bolt 31 moves the two locking pins 21 in opposite directions.

[0051] Insert the welding torch 6 into the first through hole 11;

[0052] By rotating the handle clockwise, the locking bolt 31 moves the two locking pins 21 toward each other until the welding torch 6 is clamped.

[0053] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A welding torch clamping mechanism for an automatic pipe welding robot, characterized in that, include: The clamping bracket (1) has a first through hole (11) and a second through hole (12) that are connected. The directions of the extension lines of the axes of the first through hole (11) and the second through hole (12) are the first direction and the second direction, respectively. The first direction and the second direction are perpendicular. The first through hole (11) is used to install the welding torch (6). The locking assembly (2) includes two locking pins disposed in the second through hole (12). The two locking pins are symmetrically arranged, and each locking pin has a locking end (23) near the end of the first through hole (11). The driving component (3) is used to drive the two locking pins to move closer or further apart. When the two locking pins move closer together, the two locking ends (23) apply equal decomposition forces along a third direction to the welding torch (6). The third direction points along the second through hole (12) to the first through hole (11) and is perpendicular to the first direction and the second direction.

2. The welding torch clamping mechanism for the automatic pipeline welding robot according to claim 1, characterized in that, Each of the locking pins has a threaded hole, the two threaded holes have opposite directions of rotation and equal pitch; the drive assembly (3) includes a locking bolt (31) passing through the two threaded holes, the outer wall of the locking bolt (31) having an external thread that matches the two threaded holes; it also includes a limiting assembly, which is used to limit the rotation of the locking pins when the drive assembly (3) drives the two locking pins to move.

3. The welding torch clamping mechanism for the automatic pipeline welding robot according to claim 2, characterized in that, The limiting component includes a limiting groove (13) provided on the inner wall of the second through hole (12), the extending direction of the limiting groove (13) is the second direction, and the outer wall of each locking pin is provided with a limiting member (22) that matches the limiting groove (13).

4. The welding torch clamping mechanism for the automatic pipeline welding robot according to claim 1, characterized in that, The locking end (23) has a curved surface that matches the outer wall of the welding torch (6).

5. The welding torch clamping mechanism for the automatic pipeline welding robot according to claim 2, characterized in that, It also includes a first anti-detachment component, which is used to prevent the locking bolt (31) and the locking pin from dislodging from the second through hole (12).

6. The welding torch clamping mechanism for the automatic pipeline welding robot according to claim 5, characterized in that, The first anti-detachment component includes a first disc (41) disposed at one end of the locking bolt (31) and a second disc (42) sleeved on the other end of the locking bolt (31) and threadedly connected thereto. The first disc (41) and the second disc (42) are respectively placed on the outside of the clamping bracket (1) along the second direction.

7. The welding torch clamping mechanism for the automatic pipeline welding robot according to claim 6, characterized in that, The second disc (42) is provided with a second anti-disengagement component (5) on the side away from the clamping bracket (1). The second anti-disengagement component (5) is used to prevent the second disc (42) from coming off the locking bolt (31).

8. The welding torch clamping mechanism for the automatic pipeline welding robot according to claim 6, characterized in that, The second disk (42) is provided with a splash guard (421) on the side near the first disk (41), and the splash guard (421) is used to prevent welding slag from entering the second through hole (12).

9. The welding torch clamping mechanism for the automatic pipeline welding robot according to claim 2, characterized in that, The outer wall of the locking bolt (31) is treated with an electrophoresis process.

10. The welding torch clamping mechanism for the automatic pipeline welding robot according to claim 6, characterized in that, The inner diameter of the threaded hole of the locking pin near the first disc (41) is larger than the inner diameter of the threaded hole of the locking pin near the second disc (42).

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