CN220636584U - Automatic welding device for mechanical arc voltage tracking pipeline - Google Patents

Abstract

The automatic welding device for the mechanical arc voltage tracking pipeline comprises a welding gun, a pipeline clamp, and a mechanical arc voltage tracking assembly, wherein the welding gun is arranged on the mechanical arc voltage tracking assembly. The mechanical arc voltage tracking assembly comprises a positioning assembly and a pressurizing assembly, the positioning assembly comprises a rolling shaft, the relative position of the rolling shaft is fixedly connected with the welding gun through a connecting piece, the rolling shaft rolls along the surface of a pipeline to be welded, and the distance and the angle between the end part of the welding gun and the surface of the pipeline are kept unchanged. The pressurizing assembly applies pressure to the positioning assembly to compress the positioning assembly against the surface of the pipe. The device simple structure, convenient operation can effectively improve tubule welded efficiency and quality.

Description

Automatic welding device for mechanical arc voltage tracking pipeline

Technical Field

The utility model belongs to the field of welding, and particularly relates to an automatic welding device for a mechanical arc voltage tracking pipeline.

Background

At present, small pipe welding is generally performed by adopting a special pairing clamp to pair small pipe groups, and manual welding or automatic welding is performed after manual pairing. The manual welding process has higher requirement on the experience of operators, the welding efficiency and quality are easy to be unstable, the existing automatic welding device has larger volume and higher requirement on assembly precision, and the automatic welding device is not suitable for small pipe welding operation. In the manual welding process, the distance and angle between the tungsten electrode and the arc welding seam of the pipeline are kept, and an arc voltage tracking and feedback system in an automatic welding device occupies a large volume, so that the device is expensive and heavy and is generally only used for welding large pipelines. Therefore, the automatic welding device is simple in structure and convenient to operate, and has high practical value for improving the welding efficiency and quality of the small pipe.

Disclosure of Invention

The utility model aims to provide an automatic welding device for a mechanical arc voltage tracking pipeline, which simplifies the welding operation flow of a small-caliber pipeline.

According to an embodiment of the utility model, there is provided an automatic welding device for a mechanical arc voltage tracking pipeline, which comprises a welding gun and a pipeline clamp, and further comprises a mechanical arc voltage tracking assembly, wherein the welding gun is mounted on the mechanical arc voltage tracking assembly; the mechanical arc voltage tracking assembly comprises a positioning assembly and a pressurizing assembly; the positioning assembly comprises a roller and a connecting piece, wherein the connecting piece is used for connecting the roller with the welding gun, so that the relative positions of the roller and the end part of the welding gun are fixed; the roller is used for rolling along the surface of the pipeline to be welded so as to keep the distance and the angle between the end part of the welding gun and the surface of the pipeline to be welded unchanged; the pressurizing assembly applies pressure to the positioning assembly to enable the roller to be kept in a pressed state with the surface of the pipeline to be welded.

The device can realize that welder tip and the pipeline that waits to weld keep fixed distance and angle through mechanical arc voltage tracking module in the welding process, has omitted complicated sensing and feedback system in the conventional automatic weld equipment, simple structure, with low costs, convenient operation, small in size can effectively simplify the welding operation flow of small-bore pipeline.

Further, in some embodiments, the mechanical arc voltage tracking assembly further includes a rotary drive mechanism including a mounting plate fixedly mounted with respect to the pipe to be welded and a driver that drives the mounting plate to rotate circumferentially about the pipe to be welded, and the positioning assembly and the pressurizing assembly are mounted on the mounting plate. The rotary driving mechanism can drive the welding gun to rotate around the pipeline to be welded, so that the control precision is improved, and the manual labor is reduced.

Further, in some embodiments, the driver is configured to drive the motor and the opening gear.

Further, in some embodiments, the apparatus further comprises a base plate, the pipe clamp comprises a first pipe clamp and a second pipe clamp, the first pipe clamp and the second pipe clamp are respectively installed on the base plate, and clamping axes of the first pipe clamp and the second pipe clamp are parallel to each other; the first pipeline clamp comprises a clamping piece and a moving device, wherein the moving device allows the clamping piece to translate relative to the substrate; the second pipe clamp includes a jaw and a rotation device that allows the jaw to rotate circumferentially about the clamping axis of the second pipe clamp. The first pipeline clamp and the second pipeline clamp can be used for realizing pipeline assembly, so that the operation flow is simplified, the experience and the technical requirements on operators are reduced, and the labor load in the operation process is reduced.

Further, in some embodiments, the movement device includes a sliding rail disposed on a surface of the substrate and a lifting device capable of moving along a normal direction of the substrate.

Further, in some embodiments, the apparatus further comprises a scanning device fixedly mounted to the connector, the scanning device for scanning the surface of the pipe to be welded. The scanning device can scan and measure the offset of the butt joint position of the pipe orifice, and the welding quality is improved in an auxiliary manner.

Further, in some embodiments, the scanning device is configured as a laser scanner. The laser scanner has small volume, simple operation and high precision.

Further, in some embodiments, the apparatus further comprises a controller; the pipe clamp is configured as a movable electrically controlled pipe clamp; the mechanical arc voltage tracking assembly further comprises a rotary driving mechanism, the rotary driving mechanism comprises a mounting plate, a driver and a rotary plate, the mounting plate is fixedly mounted relative to a pipeline to be welded, the driver drives the rotary plate to circumferentially rotate around the pipeline to be welded, and the positioning assembly and the pressurizing assembly are fixedly mounted on the rotary plate. The controller is in signal connection with the pipeline clamp, the welding gun, the mechanical arc voltage tracking assembly and the scanning device, and can control the pipeline clamp to adjust the relative position of a pipeline to be welded according to the scanning signal of the scanning device and control the welding gun and the mechanical arc voltage tracking assembly to execute welding operation. The control device can improve the automation level of welding operation and reduce manual participation.

Further, in some embodiments, the pressurizing assembly includes a bracket and a spring having one end abutting the bracket and the other end applying pressure to the positioning assembly.

Further, the mechanical arc voltage tracking assembly also includes a guide rail that provides a limit to the positioning assembly to limit movement of the positioning assembly along the direction of extension of the guide rail. The guide rail limits the movement direction of the positioning assembly, and is beneficial to improving the welding precision.

Drawings

FIG. 1 is a schematic diagram of an automatic mechanical arc voltage tracking pipeline welding device according to an embodiment;

FIG. 2 is a schematic diagram of a mechanical arc voltage tracking assembly and a welding gun according to an embodiment;

FIG. 3 is a schematic diagram of a structure of a pressurizing assembly according to an embodiment;

FIG. 4 is a schematic diagram of a rotation driving mechanism according to an embodiment;

FIG. 5 is a schematic diagram of a second pipe clamp according to one embodiment;

FIG. 6 is a schematic diagram of a piping misalignment structure to be welded in an embodiment.

Meaning of reference numerals: 1-a mechanical arc voltage tracking assembly; 11 a positioning assembly; 111-rolling shafts; 112-roller linkage; 113 spring cover; 114-a sliding mounting plate; 12-a pressurizing assembly; 121-a spring; 122-adjusting the screw; 123-adjusting the nut; 124-mount; 13-a rotary drive mechanism; 131-driving a motor; 132-a split gear; 133-mounting plate; 14-sliding rails; 141-a slider; 20-a substrate; 21-a first pipe clamp; 211-clamping members; 212-lifting device; 213-guide rail; 22-a second pipe clamp; 221-claw; 222-a rotating motor; 3-welding gun; 31-tungsten electrode; 32-a guidewire tube; 33-welding gun insulation shell; 34-a water-gas interface; 40-welding seams; 41-a first pipe; 42-a second conduit; 5-scanning device.

The above drawings are provided for the purpose of explaining the present utility model in detail so that those skilled in the art can understand the technical concept of the present utility model, and are not intended to limit the present utility model. For simplicity of illustration, the above figures show only schematically the structures related to the technical features of the present utility model, and not all the details and the complete structures are drawn strictly to the actual scale.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings by means of specific examples.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment herein. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments limited to the same embodiment. Those skilled in the art will appreciate that embodiments herein may be combined with other embodiments without structural conflict.

In the description herein, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be movably connected, fixedly connected, or integrally formed. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

In the description herein, terms such as "upper," "lower," "left," "right," "transverse," "longitudinal," "height," "length," "width," and the like that indicate an azimuth or positional relationship are intended to accurately describe the embodiments and simplify the description, and do not limit the details or structures involved to having to have a particular azimuth, mount or operate in a particular azimuth, and are not to be construed as limiting embodiments herein.

In the description herein, the terms "first," "second," and the like are used merely to distinguish between different objects and should not be construed as indicating relative importance or defining the number, particular order, or primary and secondary relationships of the technical features described. In the description herein, the meaning of "plurality" is at least two.

The embodiment of the utility model provides an automatic welding device for a mechanical arc voltage tracking pipeline, the structure of which is shown in fig. 1, and the device is used for assembling a first pipeline 41 and a second pipeline 42 and welding a welding seam 42 between the two pipelines to realize the welding operation of the small-caliber pipeline. Referring to fig. 2, the apparatus includes a welding gun 3, a first pipe clamp 21, and a second pipe clamp 22, wherein the first pipe clamp 21 is used for clamping a first pipe 41, the second pipe clamp 22 is used for clamping a second pipe 42, and the welding gun 3 is used for performing welding operation. The device also comprises a mechanical arc voltage tracking assembly 1 consisting of a positioning assembly 11 and a pressurizing assembly 12. The positioning assembly comprises a roller 111 and a sliding mounting plate 114 serving as a connecting piece, the roller 111 is fixedly connected with the sliding mounting plate 114 through a roller connecting rod 112, and the welding gun 3 is also connected with the sliding mounting plate 114 in a rigid connection mode, so that the relative position between the tungsten electrode 31 at the end part of the welding gun 3 and the roller 111 is kept fixed. The roller 111 is slightly staggered with the tungsten electrode 31 in the axial direction of the pipeline, and the roller 111 is used for rolling along the surface of the pipeline to be welded so as to keep the distance and angle between the tungsten electrode 31 and the surface of the pipeline unchanged and realize tracking. Referring to fig. 3, the pressurizing assembly 12 includes a spring 121 and an adjusting screw 122, wherein one end of the spring 121 is abutted against the adjusting screw 122, and the other end is abutted against a spring cover 113 fixedly connected to the sliding mounting plate 114, so that pressure is applied to the sliding mounting plate 114, and the roller 111 is kept in a pressed state on the surface of the pipe to be welded. In other embodiments, the spring 121 may be replaced by other resilient structures, such as a reed or a gas spring.

By the device, mechanical arc voltage tracking in the pipeline welding process can be realized with a simple structure, the welding operation flow is simplified, the tungsten electrode 31 of the welding gun 3 in the welding process can always keep stable distance and angle, and the welding quality of the welding line 40 is improved. Even if the surface profile of the pipeline has certain fluctuation due to processing precision or transportation and storage, the tungsten electrode 31 can still keep the stability of the relative position through the rolling of the roller 111 along the surface of the pipeline, so that the welding parameters are ensured not to deviate obviously. It will be appreciated that the connection between the welding gun 3 and the slide mounting plate 114, while rigid, is still adjustable in its relative position to accommodate pipe welds of different sizes. In different embodiments, the relative position of the welding gun 3 and the sliding mounting plate 114 can be adjusted through positioning bolts, and can also be realized through slots with different gears.

In a preferred embodiment, referring to fig. 4, the automatic mechanical arc voltage tracking pipe welding apparatus further includes a rotation driving mechanism 13, wherein the rotation driving mechanism 13 includes a mounting plate 133 and a driver, and the positioning assembly 11 and the pressurizing assembly 12 are mounted on the mounting plate 133 and can rotate under the driving of the driver. In a further preferred embodiment, the driver arrangement comprises a drive motor 131 and a split gear 132, the drive motor 131 driving the split gear 132 to rotate, thereby driving the mounting plate 133 to rotate. In a further preferred embodiment, the mounting plate 133 has a surface fixedly mounted slide rail 14, and the slide mounting plate 114 is movably coupled to the slide rail 14 by a slide block 141. The mounting plate 133 is also fixedly provided with a mounting seat 124, the mounting seat 124 is provided with an adjusting nut 123, the adjusting screw 122 is arranged in the adjusting nut 123 in a penetrating way, the length of the adjusting screw 122 penetrating out of the mounting seat 124 can be changed by rotating the adjusting screw 122, and then the pressure on the spring 121 is adjusted. The mounting plate 133 can provide support for the positioning assembly 11 and the pressurizing assembly 12, and limit the positioning assembly 11 to slide along the extending direction of the sliding rail 14, so that the tungsten electrode 31 can still be kept stable when the relative distance between the positioning assembly 11 and the pressurizing assembly 12 is changed in the welding process. In other embodiments, the power source of the mechanical arc voltage tracking pipe automatic welding device may also be configured as an external electric or pneumatic device.

In a preferred embodiment, as shown in fig. 1, a first pipe clamp 21 and a second pipe clamp 22 are mounted on a base plate 20, the clamping axes of the first pipe clamp 21 and the second pipe clamp 22 being parallel to each other. The first pipe clamp 21 includes a clamp 211 for clamping the first pipe, wherein the clamp 211 is configured in the form of a vice and is mounted on a lifting device 212, and the lifting device 212 is connected to the base plate 20 through a guide rail 213. The lifting device 212 enables the first pipe clamp 21 to be lifted to adjust the first pipe 41 and the second pipe 42 to be centered with respect to each other, and the guide rail 213 allows the first pipe clamp 21 to be moved closer to or away from the second pipe clamp 22, facilitating the pairing between the first pipe 41 and the second pipe 42. Referring to fig. 5, the second pipe clamp 22 includes a claw 221 and a rotation motor 222, and the rotation motor 222 can drive the claw 221 to rotate circumferentially around the clamping axis.

In a preferred embodiment, the apparatus further comprises a scanning device 5, the scanning device 5 being fixedly mounted on the sliding mounting plate 114 for scanning the surface of the pipe to be welded. In various embodiments, the scanning device may employ an electromagnetic scanning device or an industrial camera. In a further preferred embodiment, the scanning device 5 is configured as a laser scanner. Referring to fig. 6, taking the first pipe 41 as an example, it is generally difficult to ensure a perfect circle on the pipe profile surface due to processing accuracy, transportation, storage, and the like, and a certain undulation Δx may exist. According to welding process data feedback of the instrument pipe of the nuclear power station, the offset of the butted pipeline cannot exceed 0.1mm, the surface of the pipeline is scanned through the scanning device 5, the deviation of the pipeline size can be measured, when the offset of the first pipeline 41 and the second pipeline 42 in the butted state exceeds 0.1mm, the butted position of the first pipeline 41 and the second pipeline 42 can be adjusted through the rotary clamping jaws 221, so that the offset is minimized, and the welding quality is improved.

In a preferred embodiment, the apparatus further comprises a controller (not shown) configured as an electronically controlled clamp for each of the first and second pipe clamps 21, 22, the controller being in signal communication with each of the first and second pipe clamps 21, 22 and the welding gun 3, the mechanical arc voltage tracking assembly 1, and the scanning device 5 and capable of controlling the actuation of each of the assemblies. The device can be controlled by the controller to automatically finish pipeline welding operation, so that the manual load is reduced.

In a preferred embodiment, the process of pipe welding using the mechanical arc voltage tracking pipe automatic welding apparatus shown in fig. 1-5 is as follows:

first, the first pipe 41 is clamped to the clamping piece 211 of the first pipe clamp 21, the second pipe 42 is clamped to the claw 221 of the second pipe clamp 22, the lifting device 212 is translated along the guide rail 213 to enable the first pipe 41 to approach the second pipe 42, and the height of the lifting device 212 is adjusted to enable the first pipe 41 to be coaxial with the second pipe 42.

Then, the rotary driving mechanism 13 is started to drive the scanning device 5 to complete circumferential scanning on the butt joint position of the first pipeline 41 and the second pipeline 42, the misalignment amount is measured, and when the misalignment amount is larger than 0.1mm, the claw 221 of the second pipeline clamp 22 is rotated, and the second pipeline 42 is rotated to the position with the minimum misalignment amount. At this time, if the misalignment amount is still out of tolerance, the pipeline needs to be replaced or repaired.

Next, the welding gun 3 is arranged. The wire guide tube 32 is filled with welding wire, and the water-air interface 34 is connected with the corresponding water-air pipeline. The adjusting screw 122 is dazzled, pressure is applied to the spring cover 113 through the spring 121, the sliding mounting plate 114 is pushed to slide along the sliding rail 14 until the roller 111 is abutted against the surface of the pipeline to be welded; the position of the tungsten electrode 31 is adjusted to form proper distance and angle with the pipeline to be welded; the adjustment screw 122 continues to be rotated to provide the proper pressure to the roller 111 to ensure that the roller 111 does not disengage from the pipe surface during welding.

Finally, the rotary driving mechanism 13 is started, the mounting plate 133 drives the positioning assembly 11 and the pressurizing assembly 12 to integrally rotate circumferentially around the pipeline to be welded, the positioning assembly 11 ensures that the tungsten electrode 31 of the welding gun 3 keeps stable relative to the position of the pipeline, and the welding gun 3 finishes welding the first pipeline 41 and the second pipeline 42 in the rotating process, so that the welding seam 40 is finally formed.

In another embodiment, the process of welding a pipe using the mechanical arc voltage tracking pipe automatic welding apparatus shown in fig. 1 to 5 is as follows:

first, the first pipe 41 is clamped to the clamping piece 211 of the first pipe clamp 21, the second pipe 42 is clamped to the claw 221 of the second pipe 22, and the first pipe and the second pipe are aligned.

Next, the welding gun 3 is arranged, and the first pipe 41 and the second pipe 42 are positioned by performing a plurality of equally spaced spot welds between the first pipe 41 and the second pipe 42 by the welding gun 3.

Next, the clamping member 211 is loosened, the welding gun 3 is kept still, the second pipe clamp 22 is rotated, the first pipe 41 and the second pipe 42 are driven to circumferentially rotate and start continuous welding, the roller 111 is abutted against the surface of the pipe to be welded, and the angle and the distance between the tungsten electrode 31 and the pipe are maintained stable until a complete and continuous welding line 40 is formed.

The operation mode in the embodiment is suitable for welding free pipelines, and the welding gun 3 is kept motionless, so that a water pipe, a cable and the like cannot interfere with equipment, and the welding effect is more stable.

In the above process, in different embodiments, part or all of the steps may be performed manually, or may be performed automatically by the controller. It should be understood that the above-described method of use is not exclusive and may be adapted according to the status of the apparatus and the actual situation of the construction site in different embodiments.

The above-described embodiments are intended to explain the present utility model in further detail with reference to the figures so that those skilled in the art can understand the technical concept of the present utility model. Within the scope of the claims, the structural optimization or equivalent replacement of the parts involved, and the implementation of the different embodiments without structural and principle conflicts, all fall within the scope of protection of the present utility model.

Claims (10)

1. The automatic welding device for the mechanical arc voltage tracking pipeline comprises a welding gun and a pipeline clamp, and is characterized by further comprising a mechanical arc voltage tracking assembly, wherein the welding gun is arranged on the mechanical arc voltage tracking assembly;

the mechanical arc voltage tracking assembly comprises a positioning assembly and a pressurizing assembly;

the positioning assembly comprises a roller and a connecting piece, wherein the connecting piece is used for connecting the roller with the welding gun, so that the relative positions of the roller and the end part of the welding gun are fixed; the roller is used for rolling along the surface of the pipeline to be welded so as to keep the distance and the angle between the end part of the welding gun and the surface of the pipeline to be welded unchanged;

the pressurizing assembly applies pressure to the positioning assembly to enable the roller to be kept in a pressed state with the surface of the pipeline to be welded.

2. The apparatus of claim 1, wherein the mechanical arc voltage tracking assembly further comprises a rotary drive mechanism comprising a mounting plate fixedly mounted with respect to the pipe to be welded and a driver for driving the mounting plate to rotate circumferentially about the pipe to be welded, the positioning assembly and the pressurizing assembly being mounted on the mounting plate.

3. The mechanical arc voltage tracking pipe automatic welding apparatus of claim 2 wherein the driver is configured to drive a motor and a pinion gear.

4. The automatic mechanical arc voltage tracking pipe welding device according to claim 1 or 2, further comprising a base plate, wherein the pipe clamp comprises a first pipe clamp and a second pipe clamp, the first pipe clamp and the second pipe clamp are respectively installed on the base plate, and clamping axes of the first pipe clamp and the second pipe clamp are parallel to each other; the first pipeline clamp comprises a clamping piece and a moving device, wherein the moving device allows the clamping piece to translate relative to the substrate; the second pipe clamp includes a jaw and a rotation device that allows the jaw to rotate circumferentially about the clamping axis of the second pipe clamp.

5. The automatic mechanical arc voltage tracking pipe welding apparatus according to claim 4, wherein the moving means comprises a slide rail provided on the surface of the base plate and a lifting means capable of moving in a normal direction of the base plate.

6. The automatic mechanical arc tracking pipe welding apparatus according to claim 1 or 2, further comprising a scanning device fixedly mounted to the connecting member, the scanning device being configured to scan a surface of a pipe to be welded.

7. The mechanical arc voltage tracking pipe automatic welding apparatus of claim 6 wherein the scanning device is configured as a laser scanner.

8. The automatic welding device for mechanical arc voltage tracking pipelines according to claim 6, wherein,

also comprises a controller;

the pipe clamp is configured as a movable electrically controlled pipe clamp;

the mechanical arc voltage tracking assembly further comprises a rotary driving mechanism, the rotary driving mechanism comprises a mounting plate, a driver and a rotary plate, the mounting plate is fixedly arranged relative to a pipeline to be welded, the driver drives the rotary plate to circumferentially rotate around the pipeline to be welded, and the positioning assembly and the pressurizing assembly are fixedly arranged on the rotary plate;

the controller is in signal connection with the pipeline clamp, the welding gun, the mechanical arc voltage tracking assembly and the scanning device, and can control the pipeline clamp to adjust the relative position of a pipeline to be welded according to the scanning signal of the scanning device and control the welding gun and the mechanical arc voltage tracking assembly to execute welding operation.

9. The automatic mechanical arc tracking pipe welding apparatus according to claim 1 or 2, wherein the pressurizing assembly includes a bracket and a spring, one end of the spring is abutted against the bracket, and the other end of the spring applies pressure to the positioning assembly.

10. The mechanical arc voltage tracking pipe automatic welding apparatus of claim 1 or 2, wherein the mechanical arc voltage tracking assembly further comprises a rail that provides a limit to the positioning assembly to limit movement of the positioning assembly along the direction of extension of the rail.