A magnetic adsorption type longitudinal circumferential seam welding back gas protection device

Abstract

The present invention relates to the field of welding technology, and particularly to a magnetic adsorption type longitudinal and circumferential seam welding back gas protection device, comprising: a fixed buffer assembly, a top magnetic adsorption assembly, and a bottom magnetic adsorption assembly; the fixed buffer assembly includes a fixed plate, a sliding unit, and a spring, the sliding unit is slidably mounted on the fixed plate, one end of the spring is connected to the fixed plate, and the other end is connected to the sliding unit; the top magnetic adsorption assembly includes a fixed shaft and a top magnetic seat, the bottom end of the fixed shaft is connected to the top magnetic seat, and the top end is connected to the sliding unit; the bottom magnetic adsorption assembly includes a bottom magnetic seat, a support rod, and a back gas box, one end of the support rod is mounted on the lower side of the bottom magnetic seat, and the back gas box is mounted at the other end of the support rod and can rotate a predetermined angle relative to the support rod. By means of this back gas protection device, the welding efficiency is improved, the cost is reduced, and the welding quality is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and particularly to a magnetic absorption type longitudinal and circumferential seam welding back gas protection device. Background Art

[0002] In modern industrial production, welding technology is widely used in the manufacture of various metal structures, especially in the welding of large-diameter cylinders, and its quality directly affects the safety and reliability of the structure. The welding back gas protection device is mainly used in the longitudinal and circumferential seam welding of large-diameter cylinders or the welding process of flat plates to provide back gas protection to ensure the welding quality.

[0003] Currently, the commonly used back gas protection devices include cross manipulators, back protection follower cross arms, cross or cross support frames, etc. These toolings usually have complex structures, require a large floor space, and are expensive. During the operation process, workers need to manually lift or adjust the tooling to adapt to cylinders with different diameters, which not only increases the labor intensity but also affects the welding efficiency and quality. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the embodiments of the present invention is to provide a magnetic absorption type longitudinal and circumferential seam welding back gas protection device.

[0005] To achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

[0006] A magnetic absorption type longitudinal and circumferential seam welding back gas protection device, comprising: a fixed buffer assembly, a top magnetic absorption assembly, and a bottom magnetic absorption assembly; the fixed buffer assembly includes a fixing plate, a sliding unit, and a spring, the sliding unit is slidably installed on the fixing plate, one end of the spring is connected to the fixing plate, and the other end is connected to the sliding unit; the top magnetic absorption assembly includes a fixed shaft and a top magnetic seat, the bottom end of the fixed shaft is connected to the top magnetic seat, and the top end is connected to the sliding unit; the bottom magnetic absorption assembly includes a bottom magnetic seat, a support rod, and a back gas box, one end of the support rod is installed on the lower side of the bottom magnetic seat, and the back gas box is installed at the other end of the support rod and can rotate a predetermined angle with the support rod.

[0007] Optionally, an insulating bottom plate is provided at the top of the side surface of the fixing plate, the insulating bottom plate and the fixing plate are connected by screws, and an insulating bushing is provided between the screws and the fixing plate.

[0008] Optionally, a linear guide rail is provided at the bottom of the fixing plate, the linear guide rail is vertically arranged, and the sliding unit includes a slider, and the slider is slidably installed on the linear guide rail.

[0009] Optionally, the sliding unit further includes a support rod, a mounting block, and a circular clamp. The front side of the support rod is mounted on the slider, the rear end of the support rod extends to the rear side of the fixed plate and is connected to the upper end of the spring, and the lower end of the spring is connected to the lower end of the fixed plate. The mounting block is mounted on the lower side of the slider, and the circular clamp is mounted on the mounting block.

[0010] Optionally, the top magnetic base has a hollow chamber inside, a magnet is installed in the hollow chamber, a magnetic base cover plate is provided at one end of the top magnetic base, and handles are provided on both sides of the top magnetic base.

[0011] Optionally, universal ball seats are provided at the four corners of the top magnetic base. The universal ball seats are installed on the bottom side of the top magnetic base through studs and the height of the universal ball seats can be adjusted.

[0012] Optionally, the main structure of the bottom magnetic base is the same as that of the top magnetic base, and bearings are installed on the outer sides of both ends of the bottom magnetic base.

[0013] Optionally, the back gas box includes a back protection box body, a back protection air sieve, and a back protection arc plate. The back protection air sieve is arranged on the top side of the back protection box body, and there is a gap between the back protection air sieve and the side walls on both sides of the back protection box body. The back protection arc plate is inserted into the gap.

[0014] Optionally, an adjustment plate is provided on the side of the back protection box body. The lower end of the adjustment plate extends out towards the center of the back protection box body. A long slot is provided on the adjustment plate. A vertical rod is provided at the end of the support rod. The vertical rod is installed on the adjustment plate and is connected by bolts.

[0015] Optionally, long and short strip grooves arranged alternately are provided on the back protection sieve plate of the back gas box. An air inlet pipe is further provided in the back gas box. Air inlet holes are evenly provided on the side of the air inlet pipe away from the back protection sieve plate.

[0016] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0017] The top magnetic attraction assembly and the bottom magnetic attraction assembly work together to provide a device for back gas protection during the welding process. By the principle of magnetic attraction of the magnet, the back protection structure is divided into upper and lower parts, which can be taken and used independently to solve the technical problems in the prior art, improve the welding efficiency, reduce the cost, and improve the welding quality. When in a non-vertical welding posture, by adjusting the relative angle between the back gas box and the support rod (or the bottom magnetic base), the back gas box can better fit the cylinder body. The setting of the fixed buffer assembly can ensure that during welding (especially in a non-vertical welding posture), it can make up for the problem of poor fitting of the box body caused by the change of the pipe diameter ellipticity, and prevent the magnetic attraction effect from weakening due to excessive change in the distance between the upper and lower magnetic bases.

[0018] Advantages of additional aspects of the present invention will be given in the following description, some will become obvious from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. In addition, the distances or sizes between parts are exaggerated for showing the positions of each part, and the schematic diagrams are only for illustrative use.

[0020] Figure 1 is a schematic diagram of the back gas protection device provided by an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the fixed buffer assembly provided by an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the top magnetic attraction assembly provided by an embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of the bottom magnetic base provided by an embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the top surface of the bottom magnetic attraction assembly provided by an embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of the bottom surface of the bottom magnetic attraction assembly provided by an embodiment of the present invention;

[0026] Figure 7 is a schematic diagram of the back protection arc plate provided by an embodiment of the present invention;

[0027] Figure 8 is a schematic diagram of the back protection box body provided by an embodiment of the present invention;

[0028] Figure 9 is a side view of the back gas protection device in the use state provided by an embodiment of the present invention;

[0029] Figure 10 is a front view of the back gas protection device in the use state provided by an embodiment of the present invention;

[0030] In the figure: 1, fixed buffer assembly; 2, top magnetic attraction assembly; 3, bottom magnetic attraction assembly; 11, insulating base plate; 12, insulating bushing; 13, fixing plate; 14, linear guide rail; 15, support rod; 16, spring; 17, mounting block; 18, circular clamp; 21, fixed shaft; 22, top magnetic base; 23, handle; 24, universal ball seat; 25, magnet; 31, back protection arc plate; 32, back protection air sieve; 33, back protection box body; 34, magnetic base cover plate; 35, U-shaped clamp; 36, support bar; 37, dished screw; Detailed implementation mode

[0031] It should be noted that the following detailed description is illustrative and aims to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] As introduced in the background art, during the welding of deep penetration argon arc welding, back weld gas protection needs to be provided. When welding the longitudinal and circumferential seams of large-diameter cylinders, the tooling required for back gas protection is large in size and heavy. Common such back gas protection toolings include cross manipulators, back protection follower cross arms, cross or cross support frames, and even manual lifting. These methods not only occupy a large amount of space, are costly, but also are relatively troublesome to use and operate.

[0033] To solve the above technical problems, this embodiment proposes a magnetic attraction type longitudinal and circumferential seam welding back gas protection device. By utilizing the principle of magnetic attraction between magnets, the back protection structure is divided into upper and lower parts, which can be taken independently, attracted when in use, and separated after use. By replacing different arc-shaped plates, workpieces with different diameters can be welded, and it can better solve the back gas protection problem during the welding of longitudinal and circumferential seams of such large-diameter cylinders. By replacing the arc-shaped plate with a straight plate, it is also applicable to flat plate welding.

[0034] As Figure 1 shown, the back gas protection device includes a fixed buffer assembly 1, a top magnetic attraction assembly 2, and a bottom magnetic attraction assembly 3. As Figure 2 shown, the fixed buffer assembly 1 includes a fixing plate 13, a sliding unit, and a spring 16. The sliding unit is slidably mounted on the fixing plate 13. One end of the spring 16 is connected to the fixing plate 13, and the other end is connected to the sliding unit; as Figure 3 、 Figure 4 shown, the top magnetic attraction assembly 2 includes a fixed shaft 21 and a top magnetic base 22. The bottom end of the fixed shaft 21 is connected to the top magnetic base 22, and the top end is connected to the sliding unit; as Figure 5 、 Figure 6As shown, the bottom magnetic attraction assembly 3 includes a bottom magnetic base, a support rod 36, and a back gas box. One end of the support rod 36 is installed on the lower side of the bottom magnetic base, and the back gas box is installed at the other end of the support rod 36 and can rotate a predetermined angle relative to the support rod 36.

[0035] The top magnetic attraction assembly 2 and the bottom magnetic attraction assembly are magnetically attracted to each other, and they are respectively in close contact with the upper surface and the lower surface of the cylinder body. When the cylinder body rotates circumferentially, the two remain relatively stationary. After the position of the back protection gas box of the bottom magnetic attraction assembly 3 is adjusted, it is exactly below the circumferential seam and relatively stationary. At this time, when a shielding gas such as argon is introduced, the purpose of protecting the back of the weld can be achieved.

[0036] When in a non-vertical welding posture, by adjusting the relative angle between the back gas box and the support rod 36 (or the bottom magnetic base), the back gas box can better fit the cylinder body. The setting of the fixed buffer assembly 1 can ensure that during welding (especially in a non-vertical welding posture), the problem of poor fitting of the box body caused by the change in the ovality of the pipe diameter can be compensated, and the magnetic attraction effect can be prevented from weakening due to excessive change in the distance between the upper and lower magnetic bases.

[0037] An insulating bottom plate 11 is provided at the top of the side surface of the fixing plate 13. The insulating bottom plate 11 and the fixing plate 13 are connected by screws, and an insulating bushing 12 is provided between the screws and the fixing plate 13. The insulating bottom plate 11 is used to isolate the installation parts, and the insulating bushing 12 is used to install and isolate the screws. The insulating pad and the insulating sleeve ensure the electrical insulation of the back gas protection device and effectively prevent the possible electrical short-circuit problem during the welding process.

[0038] A linear guide rail 14 is provided at the bottom of the fixing plate 13. The linear guide rail 14 is vertically arranged. The sliding unit includes a slider, and the slider is slidably installed on the linear guide rail 14, realizing the up and down movement function of the sliding unit. By adjusting the position of the slider on the guide rail, the user can adjust the height of the back gas protection device according to the actual welding needs, so that it can better adapt to different sizes of cylinder bodies or welding working conditions.

[0039] The sliding unit further includes a support rod 15, a mounting block 17, and a circular clamp 18. The front side of the support rod 15 is installed on the slider, and the rear end of the support rod 15 extends to the rear side of the fixing plate 13 and is connected to the upper end of a spring 16. The lower end of the spring 16 is connected to the lower end of the fixing plate 13. As Figure 2 shown, the support rod 15 is installed on the slider and is connected to one end of the spring 16, and can move up and down following the spring 16. The spring 16 provides a tension force, with one end connected to the bottom and the other end connected to the support rod 15. The mounting block 17 is installed on the slider and can move up and down, and is also the mounting substrate of the circular clamp 18. The circular clamp 18 can be passed through by a fixed shaft 21, and disc-shaped screws are provided on both sides for manual tightening. The fixed shaft 21 is used to connect and fix the top magnetic base 22.

[0040] The connection between the fixed shaft 21 and the circular clamp 18 can greatly adjust the height of the top magnetic base 22, which is more compatible with the machine head and is convenient for adjusting the height of the welding gun. The spring 16 can make up for the problem of loose fit of the box body caused by the change in the ovality of the pipe diameter, and prevent the magnetic base from bouncing too high, resulting in a large change in the distance between the upper and lower magnetic bases, which leads to a weakening of the magnetic attraction effect.

[0041] The top magnetic base 22 has a hollow chamber in it, and a magnet 25 is installed in the hollow chamber. A magnetic base cover 34 is provided at one end of the top magnetic base 22, and handles 23 are provided on both sides of the top magnetic base.

[0042] A high-strength magnet 25 (permanent magnet, strong magnet) of grade N52 is installed in the hollow chamber to ensure sufficient adsorption force. A magnetic base cover 34 is provided at one end of the magnetic base to prevent the magnet 25 from being exposed or damaged from the outside, and to prevent debris from entering the magnetic base. Handles 23 are provided on both sides of the top magnetic base to facilitate the operator to install and remove the top magnetic suction component 2 during use.

[0043] The internal space of the top magnetic base 22 is divided into three parts, each of which is provided with a high-strength magnet 25. The three magnets 25 need to pay attention to the direction of the N and S poles. The structures of the upper and lower magnetic bases are the same, and the magnetic poles at corresponding positions should attract each other. The magnetic base and the handle 23 can be made of aluminum alloy.

[0044] Universal ball seats 24 are provided at the four corners of the top magnetic seat 22. The universal ball seats 24 are installed on the bottom side of the top magnetic seat 22 through studs and the height of the universal ball seats 24 can be adjusted. The height of the universal ball seats 24 can be achieved by adjusting the studs, providing flexibility in different welding postures, ensuring that the magnetic suction assembly can adapt to various welding conditions.

[0045] The main structure of the bottom magnetic seat is the same as that of the top magnetic seat 22, and bearings are installed on the outer sides of both ends of the bottom magnetic seat. The bearings are optional structures, and rubber-coated bearings can be selected. The setting of the bearings improves the adaptability of the bottom magnetic suction component 3 to rotate with the cylinder during welding, ensuring the flexibility and stability of the back gas protection device during welding.

[0046] The back air box includes a back protection box body 33, a back protection air screen 32 and a back arc protection plate 31. The back protection air screen 32 is arranged on the top side of the back protection box body 33, and a gap is arranged between the back protection air screen 32 and the side walls on both sides of the back protection box body 33. The back arc protection plate 31 is inserted into the gap.

[0047] The back protection box body 33 can be fed with back protection gas and is a support member for the back protection plate. By plugging and connecting the back protection arc plate 31 with the back protection box body 33, it is convenient to replace the arc plate to adapt to different pipe inner walls, such as Figure 7As shown, the larger the outer arc, the larger the diameter of the cylinder body it can adapt to. Conversely, the smaller the diameter of the cylinder body it can adapt to. High-temperature resistant tapes are pasted at both ends of the back protection arc plate 31 and at the positions where it contacts the cylinder body, effectively preventing the leakage of the shielding gas and improving the effect of back gas protection.

[0048] As Figure 5 、 Figure 6 As shown, an adjusting plate is provided on the side of the back protection box body 33. The lower end of the adjusting plate extends towards the center of the back protection box body 33. A long slot is provided on the adjusting plate. A vertical rod is provided at the end of the support rod 36. The vertical rod is installed on the adjusting plate and connected by bolts. When the angle needs to be adjusted, install a bolt.

[0049] The support rod 36 connects the back protection box body 33 and the bottom magnetic base, and can adjust the position and the angle with the back protection box body 33 to adapt to different welding postures and cylinder bodies with different diameters. The U-shaped clamp 35 fixes the support rod 36. By adjusting the tightness of the screw, the position of the support rod 36 can be adjusted. The disc-shaped screw 37 can be adjusted by hand to adjust the tightness of the fixation with the support rod 36, and can move back and forth, so as to adjust the relative position between the back protection box body 33 and the circumferential weld of the cylinder body. The back gas box body can rotate and telescopic, and can greatly adjust the position of the box body to adapt to different working conditions.

[0050] As Figure 8 As shown, long and short strip-shaped grooves arranged alternately are provided on the back protection sieve plate of the back gas box. An air inlet pipe is also provided in the back gas box. Air inlet holes are evenly provided on the side of the air inlet pipe away from the back protection sieve plate.

[0051] Long and short strip-shaped grooves are provided on the back protection sieve plate, and air inlet holes are evenly arranged on the side of the air inlet pipe away from the back protection sieve plate, ensuring that the shielding gas can be evenly distributed in the back protection box body 33 and evenly released, providing continuous and stable back gas protection.

[0052] To sum up, this device is divided into two major separate parts. Using the principles of magnet 25 attraction, spring 16 tension, guide rail guidance, arc plate replacement, screw locking, universal wheel walking, etc., the back gas protection box can always be placed below the welding torch, keeping the relative positions of the two stationary, thereby providing back gas protection for the longitudinal and circumferential welds of the cylinder body. The back protection box body 33 is made into an arc shape, and an air inlet pipe is welded inside. Air inlet holes are evenly provided at the lower part of the air inlet pipe, and a back protection air sieve 32 is installed at the upper part. Long and short strip-shaped grooves are evenly opened around the top of this part, which can ensure that the gas can be evenly distributed throughout the box body and evenly released. Between the air inlet copper pipe and the back protection air sieve 32, high-temperature resistant steel wool can also be evenly stuffed, so that the gas forms a more uniform and fine form after passing through, providing more uniform and reliable back gas protection.

[0053] As Figure 9 、 Figure 10 As shown, the usage method is as follows:

[0054] Fix and install the fixed buffer component 1 to parts such as the machine head, cross beam, and column, making it relatively stationary with respect to the position of the welding torch, that is: during the welding process, the relative position between the welding torch and it remains unchanged.

[0055] Fix the fixed shaft 21 of the top magnetic attraction component 2 to the circular clamp 18, and fix the appropriate height by manually adjusting the tightness of the screw.

[0056] At this time, the universal ball seat 24 of the top magnetic attraction component 2 contacts the upper surface of the cylinder body, and the slider is centered and can move a certain distance up and down.

[0057] Place the bottom magnetic attraction component 3 directly below the top magnetic attraction component 2, and the two will be attracted by magnetic force. At this time, adjust the front and rear position of the support rod 36 and the angle with the back protection box body 33 so that the back protection box body 33 is directly below the weld seam.

[0058] Introduce argon or other protective gases into the back protection box body 33, and start the welding program to complete the welding.

[0059] After welding is completed, manually remove the bottom magnetic attraction component 3 and separate it from the top magnetic attraction component 2.

[0060] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present invention.

Claims

1. A magnetic adsorption type longitudinal circumferential seam welding back gas protection device, characterized in that, Including: A fixed buffer component, a top magnetic attraction component, and a bottom magnetic attraction component; The fixed buffer component includes a fixed plate, a sliding unit, and a spring. The sliding unit is slidably installed on the fixed plate. One end of the spring is connected to the fixed plate, and the other end is connected to the sliding unit; The top magnetic attraction component includes a fixed shaft and a top magnetic seat. The bottom end of the fixed shaft is connected to the top magnetic seat, and the top end is connected to the sliding unit; The bottom magnetic attraction component includes a bottom magnetic seat, a support rod, and a back air box. One end of the support rod is installed on the lower side of the bottom magnetic seat. The back air box is installed at the other end of the support rod and can rotate a predetermined angle with the support rod; A linear guide rail is provided at the bottom of the fixed plate. The linear guide rail is vertically arranged. The sliding unit includes a slider, and the slider is slidably installed on the linear guide rail; The sliding unit further includes a support rod, a mounting block, and a circular clamp. The front side of the support rod is installed on the slider. The rear end of the support rod extends to the rear side of the fixed plate and is connected to the upper end of the spring. The lower end of the spring is connected to the lower end of the fixed plate. The mounting block is installed on the lower side of the slider, and the circular clamp is installed on the mounting block; The back air box includes a back protection box body, a back protection air sieve, and a back protection arc plate. The back protection air sieve is provided on the top side of the back protection box body, and there is a gap between the back protection air sieve and the side walls on both sides of the back protection box body. The back protection arc plate is inserted into the gap; 2. The magnetic adsorption type longitudinal circumferential seam welding back gas protection device according to claim 1, wherein, An insulating bottom plate is provided at the top of the side of the fixed plate. The insulating bottom plate and the fixed plate are connected by screws, and an insulating bushing is provided between the screws and the fixed plate; 3. The magnetic adsorption type longitudinal circumferential seam welding back gas protection device according to claim 1, wherein The top magnetic seat has a hollow chamber. A magnet is installed in the hollow chamber. One end of the top magnetic seat is provided with a magnetic seat cover plate, and handles are provided on both sides of the top magnetic seat; 4. The magnetic adsorption type longitudinal circumferential seam welding back gas protection device according to claim 1, wherein, Universal ball seats are provided at the four corners of the top magnetic seat. The universal ball seats are installed on the bottom side of the top magnetic seat through stud bolts and can adjust the height of the universal ball seats; 5. The magnetic adsorption type longitudinal circumferential seam welding back gas protection device according to claim 4, characterized in that The main structure of the bottom magnetic seat is the same as that of the top magnetic seat, and bearings are installed on the outer sides of both ends of the bottom magnetic seat; 6. The magnetic absorption type longitudinal circumferential seam welding back gas protection device according to claim 1, characterized in that, An adjusting plate is provided on the side of the back protection box body. The lower end of the adjusting plate extends out towards the centroid direction of the back protection box body. A long slot is provided on the adjusting plate. A vertical rod is provided at the end of the support rod, and the vertical rod is installed on the adjusting plate and connected by bolts; 7. The magnetic absorption type longitudinal circumferential seam welding back gas protection device according to claim 1, characterized in that, Long and short strip grooves arranged alternately are provided on the back protection sieve plate of the back air box. An air inlet pipe is further provided in the back air box, and air inlet holes are evenly provided on the side of the air inlet pipe away from the back protection sieve plate.

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