Welding gun device for electric arc welding and welding robot

Abstract

The invention relates to a welding gun device for electric arc welding and a welding robot. The welding gun device for electric arc welding comprises a base, a clamp and a first driving assembly, and the clamp is used for clamping the first end of a welding rod; the first driving assembly is installed on the base, is in transmission connection with the clamp and is used for driving the clamp to move in the first direction. The base is provided with a guide channel, the guide channel and the clamp are oppositely arranged in a spaced mode in the first direction, and the second end of the welding rod can be slidably connected to the inner wall face of the guide channel. According to the welding gun device, the first driving assembly is used for driving the clamp to drive a welding rod to move in the first direction; wherein the first direction is the feeding direction of the welding rod. According to the welding gun device for electric arc welding, the first end of the welding rod is clamped through the clamp, the second end of the welding rod is supported through the guide channel, the welding rod is prevented from deviating from the feeding direction of the welding rod under the action of gravity in the feeding process of the welding rod, and therefore the stability of the welding process is improved, and the welding quality is improved.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and more specifically, to a welding torch device and a welding robot for arc welding. Background Technology

[0002] Arc welding, as an important metal welding process, is widely used in manufacturing, construction, petrochemical and other fields. With the continuous improvement of industrial automation, traditional manual welding methods can no longer meet the requirements of modern production for welding quality stability, production efficiency and operational safety. To solve these problems, various automated welding devices and welding robots have emerged.

[0003] However, existing automatic welding devices use a robotic arm to hold one end of the welding rod for welding. Especially when welding longer welding rods, the welding rod and the robotic arm form a cantilever structure due to gravity during the welding process. The welding rod is prone to deviating from its axis, resulting in an unstable welding process and affecting the weld quality. Summary of the Invention

[0004] This invention provides a welding torch device for arc welding, which solves the technical problem in existing automatic welding devices where the welding electrode tends to deviate from its axial position, leading to instability in the welding process and consequently affecting the quality of the weld.

[0005] This invention provides a welding torch device for arc welding, comprising a base, a clamp, and a first driving assembly. The clamp is used to hold a first end of a welding electrode. The first driving assembly is mounted on the base and drivenly connected to the clamp, and is used to drive the clamp to move along a first direction. The base has a guide channel, which is spaced apart from the clamp along the first direction. A second end of the welding electrode is slidably connected to the inner wall of the guide channel. The welding torch device is configured such that the first driving assembly drives the clamp to move the welding electrode along the first direction, wherein the first direction is the feed direction of the welding electrode.

[0006] Optionally, the base is provided with a guide member, the guide member having a cavity; the guide member is provided with elastic components, the elastic components having at least three and spaced apart along the circumferential direction; the elastic component includes an elastic element and a guide block, the first end of the elastic element is fixed to the guide member, and the second end is provided with the guide block; the guide block is located in the cavity, and the guide block surrounds to form the guide channel.

[0007] Optionally, the elastic element is a spring, the guide element is provided with a limiting rod, the spring is sleeved on the limiting rod and the first end of the spring is fixed to the guide element or the limiting rod; the second end of the spring is provided with the guide block; And / or, the second end of the elastic element is fixedly provided with a connecting member, the guide block is pivotally connected to the connecting member, and the pivoting axis is perpendicular to the first direction; wherein, the guide block is a columnar structure or a spherical structure.

[0008] Optionally, the base is provided with a guide rail that extends along the first direction, and a slide table is slidably connected to the guide rail. The slide table is drivenly connected to the first drive assembly; the clamp is fixed to the slide table.

[0009] Optionally, the first drive assembly includes a motor and a lead screw, the motor is mounted on the base, the lead screw is pivotally connected to the base and drivenly connected to the motor, and the slide is drivenly connected to the lead screw; Alternatively, the first drive component is an electric actuator, and the clamp is fixed to the power output end of the electric actuator.

[0010] Optionally, the clamp includes a body, a second drive assembly, a first clamping part, and a second clamping part. The body is drivenly connected to the first drive assembly, and the second drive assembly is mounted on the body. Both the first clamping part and the second clamping part are drivenly connected to the second drive assembly. They can move closer to or further away from each other along a second direction to clamp welding rods of different sizes. The second direction is perpendicular to the first direction.

[0011] Optionally, the opposing surfaces of the first clamping portion and the second clamping portion are respectively provided with a first groove and a second groove, and the space formed by the first groove and the second groove is used to accommodate the welding rod; wherein, the extending direction of the first groove and the second groove is along the first direction.

[0012] Optionally, the body is provided with a guide groove, the extension direction of the guide groove is parallel to the second direction, and the first clamping part and the second clamping part are slidably connected to the guide groove.

[0013] Optionally, the first clamping part is fixedly provided with a first slider, and the second clamping part is fixedly provided with a second slider, and the first slider and the second slider are slidably connected to the guide groove respectively.

[0014] The welding torch device for arc welding provided by the present invention has at least the following beneficial technical effects: By using a clamp to hold the first end of the welding electrode and a guide channel to support the second end of the welding electrode, the guide channel provides radial constraint to the welding electrode, ensuring that the welding electrode maintains a straight trajectory. This prevents the welding electrode from deviating from its feeding direction under the action of gravity during the feeding process, thereby improving the stability of the welding process and enhancing the welding quality.

[0015] The present invention also provides a welding robot, which includes a robotic arm, a camera, and the welding torch device for arc welding described above. The camera is fixed to the robotic arm for identifying the welding rod; the base is fixed to the end of the robotic arm.

[0016] The welding robot provided by the present invention includes the welding torch device for arc welding described above. In addition to having all the beneficial effects of the welding torch device described above, it also has the following beneficial technical effects: By integrating a camera onto the robotic arm, the camera can monitor the electrode's position and remaining length, ensuring the continuity of the welding process and achieving fully automated arc welding. The robotic arm provides flexible spatial movement capabilities, enabling the welding robot to adapt to different welding needs. Attached Figure Description

[0017] Figure 1 This is an assembly diagram of a welding torch device for arc welding provided in an embodiment of the present invention; Figure 2 A three-dimensional structural diagram of a guide member in a welding torch device for arc welding provided in an embodiment of the present invention; Figure 3 This is a side view of the guide structure in a welding torch device for arc welding provided in an embodiment of the present invention. Figure 4 for Figure 3 The middle circle shows a magnified structural diagram of part A. Figure 5 This is a three-dimensional structural diagram of the fixture in a welding torch device for arc welding provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 10. Base; 110. Guide rail; 111. First proximity switch; 112. Second proximity switch; 120. Slide table; 121. Sensing plate; 20. Fixture; 210. Body; 211. Guide groove; 220. First clamping part; 221. First groove; 230. Second clamping part; 231. Second groove; 240. First slider; 250. Second slider; 30. Motor; 40. Guide component; 401. Guide channel; 402. Elastic component; 403. Guide block; 404. Limiting rod. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the following description is provided in conjunction with the accompanying drawings. Figure 1 —5. Specific embodiments of the present invention will be described in detail.

[0020] This invention provides a welding torch device for arc welding. Referring to the accompanying drawings, the welding torch device includes a base 10, a clamp 20, and a first driving assembly. The clamp 20 is used to hold the first end of a welding rod. The first driving assembly is mounted on the base 10 and drivenly connected to the clamp 20, and is used to drive the clamp 20 to move along a first direction. The base 10 has a guide channel 401, which is spaced apart from the clamp 20 along the first direction. The second end of the welding rod can be slidably connected to the inner wall of the guide channel 401. The welding torch device is configured such that the first driving assembly drives the clamp 20 to move the welding rod along the first direction; wherein, the first direction is the feeding direction of the welding rod. It should be noted that the welding rod is used to weld the workpiece. During the welding process, the clamp 20 is connected to a positive electrode on one of the workpieces to be welded, and the other is connected to a negative electrode.

[0021] The welding torch device for arc welding provided in this embodiment of the invention uses a clamp 20 to hold the first end of the welding rod and a guide channel 401 to support the second end of the welding rod. The guide channel 401 provides radial constraint for the welding rod, ensuring that the welding rod maintains a straight trajectory. This prevents the welding rod from deviating from its feeding direction under the action of gravity during the feeding process, thereby improving the stability of the welding process and enhancing the welding quality.

[0022] In this embodiment of the invention, see appendix. Figure 2 - Figure 4 The base 10 is provided with a guide member 40, which has a cavity. The guide member 40 is provided with elastic components, at least three of which are spaced apart in the circumferential direction. Each elastic component includes an elastic element 402 and a guide block 403. The first end of the elastic element 402 is fixed to the guide member 40, and the second end is provided with the guide block 403. The guide block 403 is located in the cavity and forms a guide channel 401. With this configuration, the elastic element 402 connected to the guide block 403 can adapt to small changes in the size of the welding rod, improving the stability of the welding rod guidance.

[0023] In this embodiment of the invention, see appendix. Figure 4 The elastic element 402 is a spring, and the guide element 403 is provided with a limiting rod 404. The spring is sleeved on the limiting rod 404, and the first end of the spring is fixed to the guide element 40 or the limiting rod 404; the second end of the spring is provided with a guide block 403. It should be noted that the limiting rod 404 can be an integral structure with the guide element 40, or it can be a separate structure. For example, the limiting rod 404 is a screw, and the screw is threadedly connected to the guide element 40. This arrangement provides guidance and limitation for the spring.

[0024] In this embodiment of the invention, a connecting member is fixedly provided at the second end of the elastic member 402, and a guide block 403 is pivotally connected to the connecting member, with the pivot axis direction perpendicular to the first direction. The guide block 403 can be a columnar structure or a spherical structure. For example, the guide block 403 can be a columnar structure, capable of stably guiding the welding rod. Alternatively, the guide block 403 can be a spherical structure; with this configuration, the spherical guide block 403 can automatically adjust its contact angle with the welding rod.

[0025] In this embodiment of the invention, see appendix. Figure 1 The base 10 is provided with a guide rail 110, which extends along a first direction. A slide table 120 is slidably connected to the guide rail 110, and the slide table 120 is drive-connected to the first drive assembly. The clamp 20 is fixed to the slide table 120. With this configuration, the slide table 120 is slidably connected to the guide rail 110, ensuring stability during the electrode feeding process.

[0026] In this embodiment of the invention, the structure of the first driving component can be varied, as follows: For example, the first drive assembly includes a motor 30 and a lead screw. The motor 30 is mounted on the base 10, the lead screw is pivotally connected to the base 10 and drivenly connected to the motor 30, and the slide 120 is drivenly connected to the lead screw.

[0027] For example, the first drive component is an electric actuator, and the clamp 20 is fixed to the power output end of the electric actuator.

[0028] In addition, other driving structures in the existing technology can be used, as long as they can enable the slide table 120 to move along the guide rail 110, and no limitation is made here.

[0029] In this embodiment of the invention, see appendix. Figure 1 The guide rail 110 is fixedly provided with a first proximity switch 111 and a second proximity switch 112, which are spaced apart along a first direction; the side of the slide table 120 is fixedly provided with a sensing plate 121, and the sensing plate 121, the first proximity switch 111 and the second proximity switch 112 are configured such that: if the sensing plate 121 moves to the first proximity switch 111, the slide table 120 stops at the position of the first proximity switch 111; if the sensing plate 121 moves to the second proximity switch 112, the slide table 120 stops at the position of the second proximity switch 112.

[0030] In this embodiment of the invention, see appendix. Figure 5The clamp 20 includes a body 210, a second drive assembly, a first clamping part 220, and a second clamping part 230. The body 210 is driveably connected to the first drive assembly, and the second drive assembly is mounted on the body 210. Both the first clamping part 220 and the second clamping part 230 are driveably connected to the second drive assembly, and they can move closer to or further away from each other along a second direction to clamp welding rods of different sizes; wherein, the second direction is perpendicular to the first direction. It should be noted that the second drive assembly can be electrically driven or pneumatically driven, as long as it can realize the movement of the first clamping part 220 and the second clamping part 230 closer to or further away from each other.

[0031] In this embodiment of the invention, see appendix. Figure 5 The first clamping part 220 and the second clamping part 230 are respectively provided with a first groove 221 and a second groove 231 on their opposite surfaces. The space formed by the first groove 221 and the second groove 231 is used to accommodate the welding rod. The first groove 221 and the second groove 231 extend in a first direction. With this arrangement, the first groove 221 and the second groove 231 increase the contact area with the welding rod, improve the stability of the welding rod clamping, and can also adapt to the clamping of welding rods with different cross-sectional shapes.

[0032] In this embodiment of the invention, see appendix. Figure 5 The main body 210 is provided with a guide groove 211, the extension direction of which is parallel to the second direction. The first clamping part 220 and the second clamping part 230 are slidably connected to the guide groove 211. With this configuration, the guide groove 211 provides guiding constraints for the movement of the first clamping part 220 and the second clamping part 230.

[0033] In this embodiment of the invention, see appendix. Figure 5 The first clamping part 220 is fixedly provided with the first slider 240, and the second clamping part 230 is fixedly provided with the second slider 250. The first slider 240 and the second slider 250 are slidably connected to the guide groove 211 respectively.

[0034] This invention also provides a welding robot, which includes a robotic arm, a camera, and the aforementioned welding torch device for arc welding. The camera is fixed to the robotic arm for identifying welding rods; the base 10 is fixed to the end of the robotic arm. It should be noted that the robotic arm adopts a multi-joint design, enabling flexible movement in three-dimensional space, ensuring positional accuracy and posture stability during the welding process. The camera can be used to identify the welding rod's position and monitor its state, such as monitoring the remaining length of the welding rod, thereby providing feedback information for the welding rod's feed motion. When the camera detects that the welding rod has been consumed to a preset length, it controls the automatic adjustment of the welding rod's feed speed or reminds the user to replace the welding rod, thereby ensuring the continuity of the welding process and the stability of the welding quality.

[0035] The welding robot provided in this embodiment of the invention integrates a camera on the robotic arm. The camera can monitor the position and remaining length of the welding electrode, ensuring the continuity of the welding process and realizing fully automated arc welding. The robotic arm provides flexible spatial movement capabilities, enabling the welding robot to adapt to different welding needs.

[0036] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A welding torch device for arc welding, characterized in that, The device includes a base (10), a clamp (20), and a first drive assembly. The clamp (20) is used to hold the first end of a welding rod. The first drive assembly is mounted on the base (10) and driven to the clamp (20), and is used to drive the clamp (20) to move along a first direction. The base (10) has a guide channel (401), which is spaced apart from the clamp (20) along the first direction. The second end of the welding rod can be slidably connected to the inner wall of the guide channel (401). The welding torch device is configured such that the first drive assembly is used to drive the clamp (20) to move the welding rod along the first direction. The first direction is the feeding direction of the welding rod.

2. The welding torch device for arc welding according to claim 1, characterized in that, The base (10) is provided with a guide (40), the guide (40) having a cavity; the guide (40) is provided with an elastic component, the elastic component having at least 3 and spaced apart along the circumferential direction; the elastic component includes an elastic element (402) and a guide block (403), the first end of the elastic element (402) is fixed to the guide (40), and the second end is provided with the guide block (403); the guide block (403) is located in the cavity, and the guide block (403) surrounds to form the guide channel (401).

3. The welding torch device for arc welding according to claim 2, characterized in that, The elastic element (402) is a spring, the guide element (40) is provided with a limiting rod (404), the spring is sleeved on the limiting rod (404) and the first end of the spring is fixed to the guide element (40) or the limiting rod (404); the second end of the spring is provided with the guide block (403). And / or, the second end of the elastic member (402) is fixed with a connecting member, and the guide block (403) is pivotally connected to the connecting member, the pivot axis direction being perpendicular to the first direction; wherein, the guide block is a columnar structure or a spherical structure.

4. The welding torch apparatus for arc welding according to any one of claims 1-3, characterized in that, The base (10) is provided with a guide rail (110), which extends along the first direction. The guide rail (110) is slidably connected to a slide table (120), which is drivenly connected to the first drive assembly. The clamp (20) is fixed to the slide table (120).

5. The welding torch apparatus for arc welding according to claim 4, characterized in that, The first drive assembly includes a motor (30) and a lead screw. The motor (30) is mounted on the base (10), the lead screw is pivotally connected to the base (10) and is drivenly connected to the motor (30), and the slide (120) is drivenly connected to the lead screw. Alternatively, the first drive component is an electric push rod, and the clamp (20) is fixed to the power output end of the electric push rod.

6. The welding torch apparatus for arc welding according to any one of claims 1-3, characterized in that, The clamp (20) includes a body (210), a second drive assembly, a first clamping part (220), and a second clamping part (230). The body (210) is driven to the first drive assembly, and the second drive assembly is mounted on the body (210). The first clamping part (220) and the second clamping part (230) are both driven to the second drive assembly. They can move closer to each other or further away from each other along a second direction to clamp welding rods of different sizes. The second direction is perpendicular to the first direction.

7. The welding torch apparatus for arc welding according to claim 6, characterized in that, The first clamping part (220) and the second clamping part (230) are respectively provided with a first groove (221) and a second groove (231) on their opposite surfaces. The space formed by the first groove (221) and the second groove (231) is used to accommodate the welding rod. The extension direction of the first groove (221) and the second groove (231) is along the first direction.

8. The welding torch apparatus for arc welding according to claim 6, characterized in that, The main body (210) is provided with a guide groove (211), the extension direction of the guide groove (211) is parallel to the second direction, and the first clamping part (220) and the second clamping part (230) are slidably connected to the guide groove (211).

9. The welding torch apparatus for arc welding according to claim 8, characterized in that, The first clamping part (220) is fixedly provided with a first slider (240), and the second clamping part (230) is fixedly provided with a second slider (250). The first slider (240) and the second slider (250) are slidably connected to the guide groove (211).

10. A welding robot, characterized in that, The device includes a robotic arm, a camera, and a welding torch for arc welding as described in any one of claims 1-9, wherein the camera is fixed to the robotic arm for identifying the welding rod; and a base (10) is fixed to the end of the robotic arm.

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