Welding machine capable of aligning circular seams

Abstract

The utility model relates to the field of welding machines, in particular to a welding machine capable of aligning circular seams, which comprises a welding assembly, a multi-shaft mechanical arm, a pipeline support, a driving machine head and a plurality of driven machine heads, each driven machine head comprises a guide rail, a pair of roller carriers, a pair of rollers, a lead screw and a handle, and the handle drives the lead screw to rotate. And then the screw rod simultaneously changes the distance between the roller carrier and the rollers, so that the height of the other pipeline is changed. When round pipes with different diameters are replaced, the distance between the two idler wheels of one driven machine head can be adjusted, the height of one pipeline is changed, and therefore the two pipelines are aligned with each other. If pipelines with the same diameter cannot be aligned due to errors, the height of one of the pipelines can still be adjusted, the errors at the splicing position can be eliminated to a small extent, and welding seams can be aligned as much as possible, so that the two pipelines are kept in a relatively straight state after being welded, and the attractiveness and smoothness of the welding seams are maintained.

Description

Technical Field

[0001] The utility model belongs to the field of welding machines, in particular to a welding machine capable of aligning annular seams. Background Art

[0002] Welding is a process of combining metals or other thermoplastic materials by heating and high temperature. The weld is a seam formed by the melting connection of the welding rod and the metal at the joint. Circumferential seam welding refers to the welding of two circular tubes or cylinders that are spliced ​​to each other. The two circular tubes to be welded are fixed by the active machine head (three-jaw chuck driven by a motor) and the passive machine head (three-jaw chuck without a motor drive) respectively. Since there is no limit point set at the position where the two circular tubes fit together, and the two three-jaw chucks cannot be adjusted up and down (completely dependent on the coaxiality of the two three-jaw chucks during the production of the welding machine), the heavier active rotating circular tube and the driven rotating circular tube are easily misaligned with each other, thus affecting the flatness of the weld. If several welding points (hereinafter referred to as pre-welding points) are welded in advance and at intervals, when the circular tube is fed into the automatic welding machine, the pre-welding point position will be repeatedly welded many times, which will also affect the flatness of the weld. Utility Model Content

[0003] The utility model aims to provide a welding machine which can adjust the height of a round pipe and align the annular seam.

[0004] To achieve the above-mentioned purpose, the utility model provides a welding machine capable of aligning annular seams, comprising: a welding assembly and a multi-axis mechanical arm thereof, wherein the welding assembly is fixed to the multi-axis mechanical arm and approaches or moves away from a workpiece to be processed under the drive of the multi-axis mechanical arm; a pipe support, an active machine head arranged on the pipe support and a plurality of slave machine heads arranged on the pipe support, wherein the pipe support is a long strip structure, the active machine head is used to drive a pipe to rotate, and the slave machine head is used to support another pipe, each of the slave machine heads comprises a guide rail, a pair of roller frames mounted on the guide rail, a roller mounted on the top of the roller frame, a screw rod penetrating the roller frame and a handle for rotating the screw rod, after the handle is rotated to drive the screw rod to rotate, the axis lines of the two rollers are parallel to the axis line of the pipe and jointly support the side of the pipe, and the two roller frames drive the two rollers to approach or move away from each other at the same time with the axis line of the pipe as the midpoint, thereby changing the height of the other pipe.

[0005] As an improvement of the above scheme, two driven machine heads are provided for clamping another pipe, the same side of the two screw rods extends out of the side surface of the pipe support, and both are provided with transmission gears, and a synchronous belt is provided between the two transmission gears. When one screw rod is rotated, the other screw rod also rotates accordingly.

[0006] As an improvement of the above solution, the cross section of the pipe support is U-shaped, and the opening faces upward, and both ends of the screw rod are supported by the side wall of the pipe support.

[0007] As an improvement of the above solution, the end of the screw rod is provided with a hand-twisted wheel with a diameter larger than that of the screw rod, or a through hole for radial insertion of the rocker, or a prism for axial insertion of the wrench.

[0008] As an improvement of the above solution, the pipe support has reserved holes for installing guide rails and screw rods at other positions, so that the distance between two adjacent driven machine heads can be adjusted, and the synchronous belt of corresponding length can be replaced at this time.

[0009] As an improvement of the above solution, the pipe support is detachably provided with a dustproof plate at the location where the two pipes are spliced, and the upper surface of the dustproof plate is recessed to form a groove for temporarily collecting welding slag.

[0010] As an improvement of the above scheme, the active machine head is a three-jaw chuck, a through hole is provided in the middle of the three-jaw chuck to facilitate the passage of the pipe, and a number of jaws are provided around the through hole that can move closer to or away from the through hole. The three-jaw chuck is connected to the motor through a transmission belt and can be driven by the motor to rotate.

[0011] The utility model has the following beneficial effects: two pipes are butted against each other, and the welding machine can achieve circumferential seam welding by clamping and rotating one of the pipes through the active machine head, and supporting and passively rotating the other pipe through the driven machine head. When replacing round pipes of different diameters, the distance between the two rollers of a driven machine head can be adjusted to change the height of one of the pipes, so that the two pipes are aligned with each other; if there are pipes of the same diameter that cannot be aligned due to errors, the height of one of the pipes can still be adjusted to slightly eliminate the error at the joint, and the welds can be aligned as much as possible, so that the two pipes remain relatively straight after welding, and the beauty and flatness of the welds are maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a stereogram of a welding machine according to an embodiment;

[0013] Figure 2 1 is a side view of a welding machine according to an embodiment.

[0014] Explanation of the reference numerals: 11. multi-axis robot arm; 12. welding assembly; 21. pipe support; 22. active machine head; 23. dustproof plate; 31. roller frame; 32. roller; 33. screw rod; 34. guide rail; 35. handle; 36. gear; 37. synchronous belt. DETAILED DESCRIPTION

[0015] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0016] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.

[0018] Reference Figure 1 and Figure 2The utility model discloses a welding machine capable of aligning annular seams, comprising: a welding assembly 12 and a multi-axis mechanical arm 11, wherein the welding assembly 12 is fixed to the multi-axis mechanical arm 11 and moves closer to or farther from a workpiece to be processed under the drive of the multi-axis mechanical arm 11; a pipe support 21, an active machine head 22 arranged on the pipe support 21, and a plurality of driven machine heads arranged on the pipe support 21, wherein the pipe support 21 is a long strip structure, the active machine head 22 is used to drive a pipe to rotate, and the driven machine head is used to support another pipe, Each of the driven machine heads includes a guide rail 34, a pair of roller frames 31 installed on the guide rail 34, a roller 32 installed on the top of the roller frame 31, a screw rod 33 passing through the roller frame 31 and a handle 35 for rotating the screw rod 33. After the handle 35 is rotated to drive the screw rod 33 to rotate, the axis lines of the two rollers 32 are parallel to the axis line of the pipeline and jointly support the side of the pipeline. The two roller frames 31 drive the two rollers 32 to move closer or farther away at the same time with the axis line of the pipeline as the midpoint, thereby changing the height of the other pipeline.

[0019] The multi-axis robot arm 11 is a linear robot arm combining a Z axis and a Y axis, which can drive the welding assembly 12 to rise and fall, approach and move away from the pipeline. In other solutions, the multi-axis robot arm 11 can also be a solution with multiple rotation axes.

[0020] As an improvement of the above scheme, two driven heads are provided for clamping another pipe, the same side of the two screw rods 33 extends out of the side surface of the pipe support 21, and both are provided with a transmission gear 36, and a synchronous belt 37 is provided between the two transmission gears 36. When one screw rod 33 is rotated, the other screw rod 33 also rotates accordingly.

[0021] As an improvement of the above solution, the cross section of the pipe support 21 is U-shaped, and the opening faces upward, and both ends of the screw rod 33 are supported by the side walls of the pipe support 21.

[0022] As an improvement of the above solution, the length of the guide rail 34 is slightly shorter than the inner width of the pipe support 21, so that the guide rail 34 can be fine-tuned inside the pipe support 21 so that the pair of roller frames 31 and their rollers 32 are in symmetrical positions. After the fine-tuning of the guide rail 34 is completed, the guide rail 34 is fixed by a bolt group.

[0023] As an improvement of the above solution, the end of the screw rod 33 is provided with a hand-twisted wheel with a diameter larger than that of the screw rod 33, or a through hole for radial insertion of a rocker, or a prism for axial insertion of a wrench.

[0024] As an improvement of the above solution, the pipe support 21 has reserved holes for installing the guide rail 34 and the screw rod 33 at other positions, so that the distance between two adjacent driven machine heads can be adjusted. At this time, the corresponding length of the synchronous belt 37 needs to be replaced. The above solution enables the welding machine to have the ability to weld long pipes after simple modification. Figure 1 As shown, a group of driven heads are also arranged on the left side of the driving head 22. If the pipeline on this side is longer, the driven heads can properly support the pipeline to balance the force on the pipeline.

[0025] As an improvement of the above solution, the pipe support 21 is detachably provided with a dustproof plate 23 at the position where the two pipes are spliced. The upper surface of the dustproof plate 23 is recessed to form a groove for temporarily collecting welding slag to prevent the welding slag from falling directly into the pipe support 21.

[0026] As an improvement of the above scheme, the active machine head 22 is a three-jaw chuck, a through hole is provided in the middle of the three-jaw chuck for the pipe to pass through, and a plurality of jaws are provided around the through hole that can move closer to or away from the through hole, and the three-jaw chuck is connected to the motor through a transmission belt and can be driven by the motor to rotate. The three-jaw chuck and its driving method can refer to the prior art.

[0027] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A welding machine capable of aligning annular seams, characterized in that: include: A welding assembly and a multi-axis robot arm thereof, wherein the welding assembly is fixed to the multi-axis robot arm and is driven by the multi-axis robot arm to move closer to or farther from a workpiece to be processed; A pipe support, an active machine head arranged on the pipe support and a plurality of driven machine heads arranged on the pipe support, the pipe support is a long strip structure, the active machine head is used to drive a pipe to rotate, the driven machine head is used to support another pipe, each of the driven machine heads includes a guide rail, a pair of roller frames installed on the guide rail, a roller installed on the top of the roller frame, a screw rod penetrating the roller frame and a handle for rotating the screw rod, after the handle is rotated to drive the screw rod to rotate, the axis lines of the two rollers are parallel to the axis line of the pipe and jointly support the side of the pipe, and the two roller frames drive the two rollers to move closer or farther away at the same time with the axis line of the pipe as the midpoint, thereby changing the height of the other pipe.

2. The welding machine capable of aligning annular seams according to claim 1, characterized in that: Two driven machine heads are provided for clamping another pipeline. The same side of the two screw rods extends out of the side surface of the pipeline support and is provided with a transmission gear. A synchronous belt is provided between the two transmission gears. When one screw rod is rotated, the other screw rod also rotates accordingly.

3. The welding machine capable of aligning annular seams according to claim 2, characterized in that: The cross section of the pipe support is U-shaped, and the opening faces upward, and both ends of the screw rod are supported by the side wall of the pipe support.

4. The welding machine capable of aligning annular seams according to claim 3, characterized in that: The end of the screw rod is provided with a hand-twisted rotating wheel with a diameter larger than that of the screw rod, or a through hole for radial insertion of a rocker, or a prism for axial insertion of a wrench.

5. The welding machine capable of aligning annular seams according to claim 4, characterized in that: The pipe support is provided with reserved holes for installing guide rails and screw rods at other positions, so that the distance between two adjacent driven machine heads can be adjusted, and the synchronous belt of corresponding length can be replaced at this time.

6. The welding machine capable of aligning annular seams according to claim 1, characterized in that: The pipeline support is detachably provided with a dustproof plate at the position where two pipelines are spliced, and the upper surface of the dustproof plate is recessed to form a groove for temporarily collecting welding slag.

7. The welding machine capable of aligning annular seams according to claim 1, characterized in that: The active machine head is a three-jaw chuck, a through hole is arranged in the middle of the three-jaw chuck for the pipe to pass through, and a plurality of jaws are arranged around the through hole which can move towards or away from the through hole. The three-jaw chuck is connected to a motor through a transmission belt and can be driven by the motor to rotate.

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