Thick-wall circular seam automatic welding machine

Abstract

The utility model discloses a thick-wall circular seam automatic welding machine, and relates to the field of automatic welding devices. Comprising a base, a guide rail assembly fixedly installed on the base, a chuck driving assembly installed through the guide rail assembly and a movable welding assembly installed on the base, the chuck driving assembly is used for synchronously clamping the two ends of a workpiece, and a movable carrier roller assembly is slidably connected to the guide rail assembly. The carrier roller assembly further has a lifting function. Continuous welding operation can be achieved through the multiple chuck driving assemblies, workpieces are supported and limited through the movable carrier roller assemblies, the problems of workpiece eccentricity and rotary jumping are avoided, the girth welding efficiency and safety are effectively improved, and meanwhile the labor cost during machining and assembling is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of automatic welding devices, and particularly to an automatic thick-wall circumferential seam welder. Background Art

[0002] The automatic circumferential seam welder is a type of welding process, usually used to weld the seams between circular or annular workpieces. The automatic circumferential seam welder can automatically complete the circumferential seam welding work according to the set programs and parameters, improving production efficiency and welding quality. Such devices generally include components such as a welding power source, a welding torch or welding head, and an automatic control system. Through the preset welding path and welding parameters, the automatic circumferential seam welder can achieve a high degree of automation and production efficiency while ensuring welding quality, and is suitable for large-volume and high-precision circumferential seam welding requirements.

[0003] For example, the patent with the patent number CN210549032U discloses a double-chuck automatic welding device with a single drive source, which proposes a double drive and uses a transmission rod to achieve synchronous rotation while the two ends of the workpiece are fixed. During processing, it is found that when the workpiece is short in length and light in weight, the above solution is more practical; while the automatic thick-wall circumferential seam welder is specially designed for welding workpieces with thicker wall thicknesses and needs to handle more complex process requirements. For example, when the workpiece is a thick-wall pipe fitting, the positioning time itself is long, and when its length is longer and weight is heavier, problems such as workpiece eccentricity and jumping during rotation are more likely to occur. At this time, the requirements for the stiffness, straightness, etc. of the transmission rod in the above solution increase, and it cannot meet the above requirements. Therefore, based on the solution proposed in the patent with the patent number CN210549032U, this application makes further improvements to solve how to quickly and accurately position large-weight workpieces, especially for precise positioning of thick-wall pipe fittings, to avoid workpiece eccentricity during processing, and then complete the preset welding process flow. Summary of the Utility Model

[0004] Purpose of the Utility Model: To provide an automatic thick-wall circumferential seam welder to solve the above problems existing in the prior art.

[0005] Technical Solution: An automatic thick-wall circumferential seam welder includes a base, a guide rail assembly fixedly installed on the base, a chuck drive assembly installed through the guide rail assembly, the chuck drive assembly being used to synchronously clamp and drive both ends of a workpiece; and a moving welding assembly installed on the base; further including:

[0006] A moving roller assembly, slidably connected to the guide rail assembly; the roller assembly also has a lifting function and is used to carry the workpiece; the workpiece is located on the roller assembly and can freely rotate with its own center line as the rotation center;

[0007] Through the lifting and lowering of the workpiece by the movable roller assembly and the cooperation with the clamping and releasing states of the workpiece by the chuck driving assembly, the rapid alignment of the workpiece on the chuck driving assembly is realized.

[0008] In a further embodiment, the movable roller group includes:

[0009] A sliding block group, which is slidably connected to the guide rail assembly;

[0010] A height adjustment structure, one end of which is mounted on the upper surface of the sliding block group;

[0011] A roller group, which is mounted on the other end of the height adjustment structure; the rollers of the roller group are in clearance fit, so that the working surface of the roller group forms an included angle within a preset range with the rotation center of the workpiece.

[0012] In a further embodiment, the chuck driving assembly includes:

[0013] A driving support column, which is slidably connected to the guide rail assembly;

[0014] A locking slider, which is slidably connected to the guide rail assembly, and one side of the locking slider is fixedly connected to the driving support column; the locking slider is used to fix the position of the driving support column;

[0015] A chuck, which is rotatably connected to the driving support column, and a plurality of material clamping arms are movably arranged on the working surface of the chuck and can perform rotational adjustment operations within a predetermined range.

[0016] In a further embodiment, the movable welding assembly includes:

[0017] A linear moving rail, which is fixedly installed on the surface of the base;

[0018] A moving plate, which is slidably connected to the linear moving rail;

[0019] A positioning disc, the bottom of which is fixedly connected to the moving plate;

[0020] A rotating arm, the bottom end of which is rotatably connected to the positioning disc, has a predetermined working height and supporting force, and the rotating arm includes at least two degrees of freedom;

[0021] A welding torch, which is mounted on the working end of the rotating arm.

[0022] In a further embodiment, a plurality of recessed positioning grooves are evenly distributed on the working surface of the guide rail assembly.

[0023] In a further embodiment, a through hole is provided on the surface of the locking slider, and a locking rod with adjustable height is arranged in the provided through hole.

[0024] In a further embodiment, it further includes a gas protection component; the gas protection component includes:

[0025] Air holes, which are arranged at the top of the driving support column and communicated with the central through hole of the chuck;

[0026] A bearing slip ring, which is fixedly installed through the air holes;

[0027] A hose, one end of which passes through the bearing slip ring and extends to be close to the outside of the chuck; the other end is connected to a protective gas storage device.

[0028] Beneficial effects:

[0029] 1. This application can effectively save the clamping and alignment time of large-weight pipe fitting workpieces.

[0030] 2. Through the chuck driving component of this application, continuous welding operation can be realized, and the workpiece is supported and limited by the moving roller component, avoiding the problems of eccentricity and rotational runout when large-weight and long workpieces rotate, and effectively improving the girth welding efficiency.

[0031] 3. Through the gas protection component, protective gas can be effectively input, ensuring the stability of the gas inside the pipe fitting during welding. Description of the drawings

[0032] Figure 1 is the overall structural schematic diagram of this application.

[0033] Figure 2 is the structural schematic diagram of one of the moving roller components of this application.

[0034] Figure 3 is the enlarged schematic diagram of some components in this application.

[0035] Figure 4 is the schematic diagram of the moving welding component in this application.

[0036] Figure 5 is the structural schematic diagram of the roller in this application.

[0037] Figure 6 is the schematic diagram of the gas protection component of this application.

[0038] The reference numerals in the drawings are: base 1, guide rail assembly 2, moving roller assembly 3, adjusting support frame 301, telescopic cylinder 302, roller 303, connecting plate 304, chuck driving component 4, driving support column 401, chuck 402, clamping arm 403, locking slider 404, linear moving rail 5, moving welding component 6, moving plate 601, positioning disk 602, rotating arm 603, welding torch 604, bearing slip ring 7, hose 8. Detailed implementation manners

[0039] In the following description, numerous specific details are given to provide a more thorough understanding of the present utility model. However, it will be apparent to those skilled in the art that the present utility model can be practiced without one or more of these details. In other instances, in order to avoid obscuring the present utility model, some well-known technical features are not described.

[0040] Embodiment 1

[0041] The innovation of this application lies in the rapid and effective positioning of large-weight, thick-wall pipe fittings, which greatly reduces the positioning and clamping time. The improved solution is that the moving roller assembly bears most of the weight of the pipe fitting while clamping the pipe fitting, slowly starting the chuck drive assembly, and gradually adjusting the height of the pipe fitting through the lifting function of the roller assembly to quickly achieve the effective positioning of such pipe fittings.

[0042] To better illustrate the solution of this application, specific components will be described in this embodiment. The thick-wall circumferential seam automatic welding machine proposed in this embodiment includes a base 1 with a predetermined working size and supporting force, and also includes two components: a movable clamping component and a moving welding component installed on the base 1. The movable clamping component includes a guide rail assembly 2 placed on the working surface of the base 1, having a predetermined working length and supporting force, capable of performing corresponding loading and limiting operations; a moving roller assembly 3 movably arranged on the working surface of the guide rail assembly 2, having a predetermined working size and supporting force; and a plurality of chuck drive units 4 movably connected to the guide rail assembly 2 and having a predetermined working size and supporting force. The moving welding component 6 includes a linear moving rail 5 placed on the working surface of the base 1 and adapted to the guide rail assembly 2, a moving plate 601 slidably connected to the working surface of the linear moving rail 5 and capable of performing corresponding movement adjustment, as well as a positioning disk 602, a rotating arm 603, and a welding torch 604.

[0043] The moving roller assembly 3 includes a sliding block group, a height adjustment structure, and a roller group. To better illustrate this solution, as Figure 2As shown in the figure, the present application provides a specific implementation solution, which includes an adjustable support frame 301 for the sliding block group, a telescopic cylinder 302 for the height adjustment structure, and a roller 303. The adjustable support frame 301 is slidably connected to the working surface of the guide rail assembly 2 through a sliding block, has a predetermined working size and a bearing space, and the working surface is provided with corresponding through holes for sliding adjustment operations within a predetermined range. The telescopic cylinder 302 is connected to the adjustable support frame 301, has a predetermined working size and a supporting force, and can perform telescopic adjustment within a predetermined range. The roller 303 is connected to the telescopic cylinder 302 through a connecting plate 304 and passes through the through holes provided in the adjustable support frame 301, and can move to corresponding working positions following the telescopic adjustment of the telescopic cylinder 302. In a further preferred implementation, there are two through holes provided on the working surface of the adjustable support frame 301, and a predetermined working distance is left between the two through holes. The connecting plate 304 has a predetermined bending arc, and there are also two rollers 303, which respectively pass through the through holes provided in the adjustable support frame 301. The roller 303 is composed of a clamping plate with a predetermined bending arc and working size and two supporting wheels. The supporting wheels are rotatably connected to the clamping plate, and during later operations, when the workpiece is rotated, a certain degree of auxiliary adjustment operations can be performed through the rolling of the supporting wheels.

[0044] Here, the present application also provides a specific implementation solution, where the height adjustment structure is selected as a scissor lift table, and the scissor lift table uses a threaded structure for height lifting and locking.

[0045] Since some pipe fittings are not cylindrical structures, the aperture size changes from one end to the other end, which makes people like Figure 5 As shown in the figure, in the present application, the roller is redesigned. The inner diameter of the rotating ring of the roller in contact with the pipe fitting is large, and the diameter of the rotating shaft of the roller is small, with a gap left between the two. Then, when the outer surface of the pipe fitting presses against the outer surface of the rotating ring at an inclined angle, the rotating ring also tilts partially, reducing the local pressure on the outer surface of the pipe fitting and preventing marks from being generated.

[0046] In the present application, the chuck driving unit 4 includes two components: a driving support column 401 and a chuck 402. The driving support column 401 is connected to the guide rail assembly 2 through a locking slider 404, has a predetermined working height and a supporting force, and can perform sliding adjustment operations within a predetermined range along the working surface of the guide rail assembly 2. The chuck 402 is rotatably connected to the driving support column 401, and a plurality of material clamping arms 403 are slidably arranged on the working surface, and can perform rotational adjustment operations within a predetermined range. The driving support column 401 is hollow and has a predetermined accommodating property, and can internally accommodate a corresponding driving source, such as a driving motor, etc. There are at least three material clamping arms 403, and they can perform corresponding sliding adjustment operations along the working surface of the chuck 402 to facilitate corresponding clamping operations on the workpiece in the later stage.

[0047] Example Two

[0048] Based on Example One, the mobile welding assembly 6 includes four components: a moving plate 601, a positioning disk 602, a rotating arm 603, and a welding torch 604. The moving plate 601 is slidably connected to the working surface of the linear moving rail 5, has a predetermined working size and a bearing space, and can perform sliding adjustment operations within a predetermined range along the working surface of the linear moving rail 5. The positioning disk 602 is placed on the working surface of the moving plate 601, has a predetermined working size and a supporting force, and can be mobilized to corresponding working positions following the sliding adjustment of the moving plate 601. The rotating arm 603 is rotatably connected to the positioning disk 602, has a predetermined working height and a supporting force, and can perform omnidirectional rotational adjustment operations. The welding torch 604 is connected to the rotating arm 603, has a predetermined working size, and can be mobilized to corresponding working angles following the rotational adjustment of the rotating arm 603. The welding torch 604 is rotatably connected to the rotating arm 603 and can perform omnidirectional rotational adjustment operations, thereby enabling omnidirectional circumferential welding treatment of the workpiece. At the same time, the welding torch 604 unit 6 can be electrically connected to a corresponding motion control system to achieve corresponding full-automatic control. One of the driving units of multiple chucks 402 is fixedly connected to the base 1 and can perform corresponding supporting and limiting operations, while the other is slidably connected to the guide rail assembly 2 through a locking slider 404 and can perform sliding adjustment operations within a predetermined range. During the later operation process, the working position of the chuck 402 driving unit 4 can be limited by restricting the working position of the locking slider 404 according to the length dimension of the workpiece, thereby enabling the working distance between multiple chuck 402 driving units 4 to be limited and adjusted to adapt to workpieces of different length dimensions. A plurality of recessed positioning slots are evenly distributed on the working surface of the guide rail assembly 2. The working surface of the locking slider 404 is provided with a through hole, and a locking rod of a predetermined working length is slidably arranged in the through hole. The locking rod passes through the through hole provided in the locking slider 404 and can perform flexible sliding adjustment. During the later operation process, when mobile adjustment is required, only make the locking rod slide upward in the working direction, so that the locking slider 404 can slide flexibly along the working surface of the guide rail assembly 2. When the sliding adjustment reaches the predetermined working position, only make the locking rod slide downward in the working direction, so that the locking rod passes through the locking slider 404 and is inserted into the positioning slot provided in the guide rail assembly 2, thereby locking and limiting the locking slider 404 and further realizing the limiting and fixing of the chuck 402 driving unit 4. The locking rod can also be threadedly connected to the locking slider 404.

[0049] Example Three

[0050] During welding, some gases, heat, impurities, etc. penetrate into the interior of the pipe fittings, damaging the gas environment inside the pipe fittings. In this embodiment, a new solution is proposed. A gas protection component is provided to introduce protective gas into the interior of the pipe fittings to ensure that the internal environment remains stable during the processing of the pipe fittings. The specific solution is as follows: a gas hole is opened at the top position of the driving support column 401, and the gas hole is communicated with the central through hole of the chuck 402. A bearing slip ring 7 is installed in the gas hole, and a guiding hose 8 is introduced. One end of the guiding hose 8 passes through the bearing slip ring 7, extends and approaches the outside of the chuck 402, and conveys gas into the interior of the pipe fittings. The other end of the guiding hose 8 is connected to a protective gas storage device.

[0051] Based on the above embodiment, the working process of the present utility model is as follows: First, place the pipe fitting workpiece on the working surface of the provided moving roller assembly 3, and perform limit clamping through the provided chuck driving unit 4. Drive the chuck driving unit 4 to rotate slowly, adjust the working height of the moving roller assembly 3, so that the chuck driving unit 4 performs positioning adjustment on the pipe fitting, and then perform welding treatment through the provided moving welding assembly. And according to the workpiece size requirements, the working positions of the chuck 402 driving unit 4 and the welding torch 604 unit 6 can be flexibly adjusted in real time.

[0052] As described above, although the present utility model has been shown and described with reference to specific preferred embodiments, it should not be construed as a limitation of the present utility model itself. Various changes can be made in its form and details without departing from the spirit and scope of the present utility model defined by the appended claims.

Claims

1. A thick-walled circumferential seam automatic welding machine, comprising a base, a guide rail assembly fixedly mounted on the base, and a chuck drive assembly mounted through the guide rail assembly, wherein the chuck drive assembly is used to synchronously clamp and drive both ends of a workpiece; and a mobile welding assembly mounted on the base; characterized in that, Also includes: A movable roller assembly is slidably connected to the guide rail assembly; the roller assembly also has a lifting function and is used to carry a workpiece; the workpiece is located on the roller assembly and can rotate freely with its center line as the rotation center; The workpiece is lifted and lowered by the movable roller assembly, and cooperates with the chuck drive assembly in a slow-speed driving state to achieve rapid alignment of the workpiece on the chuck drive assembly.

2. The thick-walled circumferential seam automatic welding machine according to claim 1, characterized in that: The movable roller group comprises: A sliding block group, the sliding block group is slidably connected to the guide rail assembly; A height adjustment structure, one end of which is mounted on the upper surface of the sliding block group; A roller group is installed at the other end of the height adjustment structure; the rollers of the roller group are gap-assembled so that the working surface of the roller group and the rotation center of the workpiece form an angle within a preset range.

3. The thick-walled circumferential seam automatic welding machine according to claim 2, characterized in that: The chuck drive assembly include: A driving support column, slidably connected to the guide rail assembly; A locking slider is slidably connected to the guide rail assembly, and one side of the locking slider is fixedly connected to the driving support column; the locking slider is used to fix the position of the driving support column; The chuck is rotatably connected to the driving support column, and a plurality of clamping arms are movably arranged on the working surface, which can perform rotation adjustment operations within a predetermined range.

4. The thick-walled circumferential seam automatic welding machine according to claim 1, characterized in that: The mobile welding assembly comprises: A linear moving rail is fixedly mounted on the surface of the base; A movable plate slidably connected to the linear movable rail; A positioning plate, the bottom of which is fixedly connected to the moving plate; A rotating arm, the bottom end of which is rotatably connected to the positioning plate, has a predetermined working height and supporting force, and the rotating arm includes at least two degrees of freedom; A welding gun is installed at the working end of the rotating arm.

5. The thick-walled circumferential seam automatic welding machine according to claim 4, characterized in that: A plurality of recessed positioning grooves are evenly distributed on the working surface of the guide rail assembly.

6. The thick-walled circumferential seam automatic welding machine according to claim 3, characterized in that: A through hole is provided on the surface of the locking slide block, and a locking rod with adjustable height is arranged in the through hole.

7. The thick-walled circumferential seam automatic welding machine according to claim 3, characterized in that: Also includes a gas protection component; the gas protection component includes: An air hole is provided at the top of the driving support column and is communicated with the central through hole of the chuck; A bearing slip ring is fixedly installed through the air hole; A hose has one end passing through the bearing slip ring and extending close to the outside of the chuck; and the other end is connected to a protective gas storage device.

Images