Welding positioning auxiliary tool for welding equipment

Abstract

The invention relates to the technical field of welding equipment, in particular to a welding positioning auxiliary tool for welding equipment. According to the technical scheme, inner positioning rings and adjustable positioning mechanisms are arranged on the two sides of a workbench, the circle centers of the inner positioning rings and the adjustable positioning mechanisms are located on the same horizontal line, the inner positioning rings are located in workpieces to be welded, the adjustable positioning mechanisms are located outside the workpieces to be welded, and laser welding devices fixed to the workbench are arranged between the adjacent adjustable positioning mechanisms. Through the inner positioning rings and the adjustable positioning mechanisms arranged at the two ends, the main body part of the workpiece is fixed from the inside through the inner positioning rings, so that the requirement for high-strength rigid positioning and fixing of the whole workpiece is met, and the workpiece is fixed from the outside of the welding position through the adjustable positioning mechanisms; by means of the adjustable positioning mechanism, the requirement that flexible supporting and rigid supporting coexist on the position of the workpiece can be met, the stability of the workpiece in the whole welding process is guaranteed, and oval deformation caused by supporting force can be reduced to the maximum extent.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and particularly relates to a welding positioning auxiliary tooling for welding equipment. Background Art

[0002] When performing laser welding on shell-like workpieces, it is necessary to position and butt the two workpieces. After ensuring that their positions are the same, laser welding is carried out.

[0003] The document with the publication number CN118875549B points out that when the existing laser welding machine welds two columnar shells with different diameters together, in order to ensure the accurate butt joint of the two columnar shells, generally, workers need to repeatedly measure and position. On the one hand, this positioning process increases the labor intensity of workers, and on the other hand, the measurement and positioning take a long time, seriously affecting the subsequent welding efficiency.

[0004] It directly sleeves the two columnar shells with large and small diameters on the outer sides of the lower positioning frame and the upper positioning frame in sequence. The lower positioning frame with a circular array centers the columnar shell with a large diameter, and the upper positioning frame with a circular array centers the columnar shell with a small diameter, that is, the two columnar shells with large and small diameters are accurately butted and positioned together. This process does not require workers to repeatedly measure and position, effectively reducing the labor intensity of workers and improving the positioning convenience. At the same time, by directly sleeving the two columnar shells with large and small diameters on the outer sides of the lower positioning frame and the upper positioning frame in sequence, the positioning can be completed, saving the time consumed by measurement and positioning and promoting the welding efficiency.

[0005] However, during laser welding, due to factors such as the stress during installation and the influence of welding heat on the workpiece, the connection welding part of the workpiece is prone to cause local deformation of the pipeline, resulting in the problem of ovality. This may cause an ovality error in the pipeline during the welding process, which will lead to uneven gaps between the pipelines during positioning welding, affecting the welding quality. For example, when the ovality is large, the local gap is too small, and it is difficult for the welding rod to penetrate for welding; while when the local gap is too large, problems such as burn-through and poor weld formation may occur during welding. Summary of the Invention

[0006] The purpose of the present invention is to propose a welding positioning auxiliary tooling for welding equipment in view of the problems in the background art.

[0007] The technical solution of the present invention: A welding positioning auxiliary tooling for welding equipment includes an inner positioning ring and an adjustable positioning mechanism provided on both sides of the workbench, and the centers of the two are on the same horizontal line. The inner positioning ring is located inside the workpiece to be welded, and the adjustable positioning mechanism is located outside the workpiece to be welded. A laser welding device fixed on the workbench is provided between adjacent adjustable positioning mechanisms; The inner positioning ring is movably arranged on the threaded rod through the threaded seat. The inner positioning ring is provided with a number of equally spaced inner grooves. Positioning columns are slidably installed in the inner grooves. A number of triangular seats are equally spaced on the circumferential side of the threaded rod. The triangular seats penetrate through the inner grooves and contact the ends of the positioning columns. Stabilizing structures are provided on both sides of the positioning columns; The adjustable positioning mechanism includes an outer positioning ring fixed on the workbench. The outer positioning ring is provided with a number of equally spaced outer grooves. Cylinders are installed in the outer grooves. Each cylinder includes a piston rod and a liquid outlet cylinder. A second extrusion rod is provided in the liquid outlet cylinder. A magnetorheological fluid is provided in the cylinder. The magnetorheological fluid carries particulate matter. A first electromagnetic coil installed in the outer positioning ring is provided outside the cylinder. A movable moving seat is threadedly installed on the threaded rod. A push plate for pushing the piston rod is fixed on the moving seat; A side positioning seat is fixed on the side of the cylinder. A U-shaped cavity communicating with the cylinder is provided in the side positioning seat. And a pressure valve is installed at the communicating part. The U-shaped cavity includes a reflux area. The reflux area communicates with an auxiliary liquid cylinder fixed on the side positioning seat. A third extrusion rod is provided in the auxiliary liquid cylinder. A second electromagnetic coil is provided outside the auxiliary liquid cylinder. The diameter of the particulate matter carried by the magnetorheological fluid is smaller than the diameter of the U-shaped cavity.

[0008] Preferably, the magnetorheological fluid provided in the cylinder is composed of carbonyl iron powder, silicone oil and anti-settling agent. The particulate matter carried by the magnetorheological fluid is made of iron material. And the diameter of a single particulate matter is smaller than the pipe diameter of the auxiliary liquid cylinder.

[0009] Preferably, a cooling cavity is provided on the outer positioning ring. A cover body is installed outside the outer positioning ring. The cover body is provided with a water injection port communicating with the cooling cavity.

[0010] Preferably, pressure valves are installed at both the liquid inlet and the liquid outlet of the U-shaped cavity. The set threshold of the pressure valve at the liquid inlet is smaller than the set threshold of the pressure valve at the liquid outlet. And the diameter of the liquid inlet of the U-shaped cavity is larger than the diameter of the liquid outlet. The side close to the reflux area is the liquid outlet, and the side far from the reflux area is the liquid inlet.

[0011] Preferably, a sliding table is installed on the workbench. A support arm is installed on the sliding table. The support arm is fixedly installed with a motor, a triangular seat and a limit frame. The output end of the motor is fixedly installed with a threaded rod. The threaded seat is threadedly installed on the threaded rod. The inner positioning ring is fixedly connected with the threaded seat. The end of the positioning column is an inclined surface. The inclined surface is in fit with the triangular seat. Limit plates fixed in the inner grooves are provided on both sides of the triangular seat. A protective cover is also provided on the workbench.

[0012] Preferably, a moving seat is threadedly installed on the threaded rod. Both sides of the moving seat are located between adjacent reflux areas and are in fit with the reflux areas. At least two inner positioning rings are provided on the threaded rod. Installation rods penetrating through the inner positioning rings are fixed on both sides of the moving seat. Push plates are fixedly installed on the installation rods.

[0013] Preferably, the stability structure includes a connecting plate fixed to the bottom of the positioning column. An oil cylinder is fixed in the inner groove. The oil cylinder includes a pressing rod and a first extrusion rod. The pressing rod is fixedly connected to the connecting plate. A connecting frame is fixedly installed on the first extrusion rod. A limiting strip is fixed to the side of the positioning column. A cutting plate located above the limiting strip is rotatably installed in the inner groove. The cutting plate is hinged to the connecting frame.

[0014] Compared with the existing technology, the beneficial effects of the present invention are as follows: 1. By providing inner positioning rings and adjustable positioning mechanisms at both ends, the main part of the workpiece is fixed from the inside through the inner positioning rings, meeting the requirement of high-strength rigid positioning and fixing for the overall workpiece. The adjustable positioning mechanism fixes it from the outside of the welding joint. The adjustable positioning mechanism can meet the support requirements of coexisting flexibility and rigidity for this part of the workpiece, ensuring the stability of the workpiece during the entire welding process and minimizing the oval deformation caused by the supporting force to the greatest extent.

[0015] 2. Side positioning seats are installed on both sides of the adjustable positioning mechanism. By opening a U-shaped cavity in the side positioning seat, and the U-shaped cavity includes a reflux area and the setting of a third extrusion rod. When the problem of excessive flexibility of the adjustable positioning mechanism occurs, the magnetorheological fluid can overflow into the U-shaped cavity, causing the particles in the magnetorheological fluid to accumulate and push out the third extrusion rod, so that the third extrusion rod can fix the workpiece together with the second extrusion rod, greatly improving the stability of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic partial structural diagram of the present invention; Figure 3 is a schematic structural diagram of the adjustable positioning mechanism of the present invention; Figure 4 is a schematic cross-sectional structural diagram of the side positioning seat of the present invention; Figure 5 is a schematic diagram after the magnetorheological fluid enters the side positioning seat of the present invention; Figure 6 is a schematic structural diagram of the triangular seat of the present invention; Figure 7 is a schematic structural diagram of the inner positioning ring of the present invention; Figure 8 is a schematic diagram of the stability structure of the present invention; Figure 9 is a schematic cross-sectional diagram of the stability structure of the present invention.

[0017] Reference numerals: 1, inner positioning ring; 2, adjustable positioning mechanism; 3, side positioning seat; 4, U-shaped cavity; 5, reflux zone; 6, auxiliary liquid cylinder; 7, third extrusion rod; 8, pressure valve; 9, second electromagnetic coil; 11, inner groove; 12, positioning column; 13, inclined surface; 14, oil cylinder; 15, extrusion rod; 16, first extrusion rod; 17, cutting plate; 18, limiting strip; 19, connecting plate; 21, outer positioning ring; 22, outer groove; 23, cylinder block; 231, liquid outlet cylinder; 232, filter screen; 24, piston rod; 25, second extrusion rod; 26, water injection port; 27, first electromagnetic coil; 28, cooling cavity; 29, cover body; 100, laser welding device; 200, sliding table; 300, threaded rod; 400, threaded seat; 500, triangular seat; 600, protective cover; 700, limiting frame; 800, moving seat; 900, mounting rod; 1000, push plate. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0019] Referring to the attached Figures 1-9 drawings, a welding positioning auxiliary tool for a welding device includes an inner positioning ring 1 and an adjustable positioning mechanism 2 provided on both sides of a workbench. The centers of the two are on the same horizontal line. The inner positioning ring 1 is located inside the workpiece to be welded, and the adjustable positioning mechanism 2 is located outside the workpiece to be welded. A laser welding device 100 fixed on the workbench is provided between adjacent adjustable positioning mechanisms 2; The inner positioning ring 1 is movably arranged on the threaded rod 300 through a threaded seat 400. The inner positioning ring 1 is provided with a number of equally spaced inner grooves 11. Positioning columns 12 are slidably installed in the inner grooves 11. A number of triangular seats 500 are equally spaced on the circumferential side of the threaded rod 300. The triangular seats 500 penetrate the inner grooves 11 and contact the ends of the positioning columns 12. Stability maintaining structures are provided on both sides of the positioning columns 12; The adjustable positioning mechanism 2 includes an outer positioning ring 21 fixed on the workbench. The outer positioning ring 21 is provided with a number of equally spaced outer grooves 22. A cylinder block 23 is installed in the outer grooves 22. The cylinder block 23 includes a piston rod 24 and a liquid outlet cylinder 231. A 233 and a second extrusion rod 25 are provided in the liquid outlet cylinder 231. A magnetorheological fluid is provided in the cylinder block 23. The magnetorheological fluid carries particulate matter. A first electromagnetic coil 27 installed inside the outer positioning ring 21 is provided outside the cylinder block 23. A movable moving seat 800 is threadedly installed on the threaded rod 300. The moving seat 800 is fixed with a push plate 1000 for pushing the piston rod 24; A side positioning seat 3 is fixed to the side of the cylinder block 23. An inner U-shaped cavity 4 communicating with the cylinder block 23 is provided in the side positioning seat 3, and a pressure valve 8 is installed at the communicating part. The U-shaped cavity 4 includes a reflux area 5. The reflux area 5 communicates with an auxiliary liquid cylinder 6 fixed to the side positioning seat 3. A third extrusion rod 7 is provided in the auxiliary liquid cylinder 6. A second electromagnetic coil 9 is provided outside the auxiliary liquid cylinder 6. The diameter of the particulate matter carried by the magnetorheological fluid is smaller than the diameter of the U-shaped cavity 4.

[0020] When the workpiece is positioned and butted, the main body of the workpiece needs to be rigidly positioned and fixed with high strength. However, at the welding part of the workpiece, due to the stress during installation and the influence of welding heat, local deformation is likely to occur at this part, resulting in the problem of ovality.

[0021] In the present invention, the main part of the workpiece is positioned and fixed by the inner positioning ring 1 entering into it. Specifically, when the inner positioning ring 1 moves on the threaded rod 300, the positioning posts 12 will move on the inclined surface of the triangular seat 500. As it continuously moves, several positioning posts 12 will hold the workpiece from all around, and the positioning strength is ensured through the stability maintaining structure. Subsequently, the outside of the welding part of the workpiece is fixed by the adjustable positioning mechanism 2. Specifically, the welding part of the workpiece will be located inside the adjustable positioning mechanism 2. When the threaded rod 300 rotates, the moving seat 800 will drive the movement of the push plate 1000, so that the push plate 1000 will push the piston rod 24. The piston rod 24 will extrude the magnetorheological fluid in the cylinder block 23, causing it to lift the second extrusion rod 25 out similar to an oil cylinder. Several second extrusion rods 25 will hold the outside of the adjustable positioning mechanism 2, making the adjustable positioning mechanism 2 be positioned and fixed. However, at this time, the particulate matter carried by the magnetorheological fluid will be filtered by the filter screen 232, so that the particulate matter still stays in the cylinder block 23. It should be noted that in the present invention, when there is no magnetic field action on the magnetorheological fluid provided in the cylinder block 23, the magnetorheological fluid is in a fluid state and can freely flow according to the shape of the workpiece, enabling the second extrusion rod 25 to fit well with the surface of the workpiece for flexible support. When the first electromagnetic coil 27 is energized to generate a magnetic force, the magnetorheological fluid will change from a liquid state to a quasi-solid state within a few milliseconds. The magnetic particles form a chain-like structure along the magnetic field direction to hinder the fluid flow. At this time, the flexible support can become a rigid support, avoiding the oval deformation caused by the non-adjustable support force of traditional mechanical equipment.

[0022] For example, for thin-walled parts, the force application points of traditional supports are concentrated, which easily causes excessive local stress on the parts and generates ovality errors. However, the cylinder block 23 can evenly distribute the support force on the surface of the workpiece through the uniform solidification of the magnetorheological fluid, thereby reducing the ovality error.

[0023] It should also be noted that during use, the workpiece is positioned by the second extrusion rod 25. However, the magnetic particles in the magnetorheological fluid may precipitate during long-term suspension, affecting the performance stability of the magnetorheological fluid. In addition, the performance of the magnetorheological fluid is also affected by temperature changes. Too high or too low temperature may cause changes in its rheological characteristics, thereby affecting the support effect.

[0024] As Figure 4 and 5 shown, in the present invention, after the piston rod 24 pushes the magnetorheological fluid out of the second extrusion rod 25 for a period of time, the magnetorheological fluid in the cylinder block 23 may encounter the above problems. At this time, the workpiece will exert a reaction force on the second extrusion rod 25, causing the second extrusion rod 25 to move into the cylinder block 23, thus increasing the pressure in the cylinder block 23. When the pressure reaches a certain level, the pressure will open the pressure valve 8, causing some magnetorheological fluid to carry particulate matter into the U-shaped cavity 4 together. When the magnetorheological fluid flows to the reflux area 5 in the U-shaped cavity 4, the fluid will form a swirl at the reflux area 5, causing the particulate matter to accumulate at the reflux area 5. At this time, the second electromagnetic coil 9 is energized to make the auxiliary liquid cylinder 6 magnetic, which can adsorb the particulate matter into the auxiliary liquid cylinder 6. The particulate matter will lift the third extrusion rod 7, so the third extrusion rod 7 will come out of the auxiliary liquid cylinder 6 to position and fix the workpiece together with the second extrusion rod 25; In addition, as Figure 5 shown, the particulate matter will accumulate at the reflux area 5, making the supporting force of the third extrusion rod 7 composed of a group of accumulated particulate matter, forming a structure similar to a foundation, greatly improving the supporting force of the third extrusion rod 7. Thus, compared with the supporting force of the second extrusion rod 25 at this time, it forms a rigid support, greatly improving the stability of single support by the second extrusion rod 25. It should also be noted that the third extrusion rod 7 is not affected by magnetic force.

[0025] In this embodiment, the magnetorheological fluid provided in the cylinder block 23 is composed of carbonyl iron powder, silicone oil and anti-settling agent. The particulate matter carried by the magnetorheological fluid is made of iron material, and the diameter of a single particulate matter is smaller than the inner diameter of the auxiliary liquid cylinder 6.

[0026] Specifically, in this embodiment, the particle size of the carbonyl iron powder is 5 - 10 μm, the volume fraction is 40%, the viscosity of the silicone oil is 50 cSt, the anti-settling agent is nano-SiO, and the proportion is 2 wt%; The first electromagnetic coil 27 is designed in a matrix partition. In this embodiment, it is a 6×6 grid, the single module size is 50×50 mm, its wire is enameled copper wire, the wire diameter is 0.5 mm, the number of turns is 80 - 100 turns / module, the resistance is approximately 2 Ω, and the maximum current is 5 A.

[0027] It should be noted that in this embodiment, the laser welding positioning operation for small-diameter workpieces is addressed, so the above specifications are selected for the design.

[0028] It should also be noted that a cooling cavity 28 is provided on the outer positioning ring 21, and a cover 29 is installed outside the outer positioning ring 21. The cover 29 is provided with a water injection port 26 communicating with the cooling cavity 28. Specifically, in this embodiment, the outer positioning ring 21 is made of non-magnetic stainless steel, which has the function of supporting the overall structure, ensuring mechanical stability, and can isolate external magnetic field interference to prevent magnetic induction line leakage.

[0029] In addition, fluororubber seals or gaskets are provided for both the cooling cavity 28 and the water injection port 26 to ensure that the cooling water does not leak. When the first electromagnetic coil 27 is energized, the cylinder block 23 will generate a large amount of heat. Cooling water can be input into the cooling cavity 28 through the water injection port 26 to achieve a cooling effect.

[0030] It should be emphasized that in this embodiment, pressure valves 8 are installed at both the liquid inlet and the liquid outlet of the U-shaped cavity 4. The set threshold of the pressure valve 8 at the liquid inlet is smaller than the set threshold of the pressure valve 8 at the liquid outlet. Moreover, the diameter of the liquid inlet of the U-shaped cavity 4 is larger than the diameter of the liquid outlet. The side close to the reflux area 5 is the liquid outlet, and the side far from the reflux area 5 is the liquid inlet.

[0031] When the pressure in the cylinder block 23 is too high, it will reach the threshold of the pressure valve 8 at the liquid inlet. Therefore, the pressure valve 8 at the liquid inlet will open first, and the magnetorheological fluid will enter the U-shaped cavity 4, which has a pressure relief effect on the cylinder block 23, causing the pressure valve 8 at the liquid outlet to remain closed, so that the magnetorheological fluid will not return to the cylinder block 23 in a short time. The diameter of the liquid inlet of the U-shaped cavity 4 is larger than the diameter of the liquid outlet, which ensures that the magnetorheological fluid can quickly enter the U-shaped cavity 4 within a certain period of time. When particulate matter accumulates in the reflux area 5, by reducing the diameter of the liquid outlet, it is ensured that the particulate matter will not impact the liquid outlet in a large amount at once, ensuring the stability of the accumulation state. And when the pressure in the U-shaped cavity 4 is large enough later, the pressure valve 8 at the liquid outlet will open, allowing the released liquid to enter the cylinder block 23 again. At this time, by reducing the diameter of the liquid outlet, it is ensured that the accumulated particulate matter will collapse slowly, so that the supporting force will disappear slowly, avoiding the sudden loss of control of the workpiece support.

[0032] In this embodiment, the installation specifically further includes a sliding table 200 installed on the workbench. A support arm is installed on the sliding table 200, and a motor, a triangular seat 500, and a limiting frame 700 are fixedly installed on the support arm. A threaded rod 300 is fixedly installed at the output end of the motor. A threaded seat 400 is threadedly installed on the threaded rod 300. The inner positioning ring 1 is fixedly connected to the threaded seat 400. The end of the positioning column 12 is an inclined surface 13, and the inclined surface 13 is arranged in contact with the triangular seat 500. Limiting plates fixed in the inner groove 11 are provided on both sides of the triangular seat 500. A protective cover 600 is also provided on the workbench.

[0033] During specific operation, the motor is started to drive the threaded rod 300 to rotate. At this time, the triangular seat 500 passes through the inner positioning ring 1, and through the limiting plates in the inner groove 11, the inner positioning ring 1 and the U-shaped cavity 4 will not rotate due to the rotation of the threaded rod 300, but only the U-shaped cavity 4 will move on the threaded rod 300. Thus, the threaded seat 400 will drive the inner positioning ring 1 to move on the threaded rod 300, and the fixation also causes the return zone 5 to push up the positioning column 12.

[0034] A moving seat 800 is threadedly installed on the threaded rod 300. Both sides of the moving seat 800 are located between adjacent return zones 5 and are arranged in contact with the return zones 5. At least two inner positioning rings 1 are provided on the threaded rod 300. Installation rods 900 penetrating the inner positioning rings 1 are fixed on both sides of the moving seat 800, and a pushing plate 1000 is fixedly installed on the installation rods 900.

[0035] Therefore, when the threaded rod 300 rotates, due to the limitation of the adjacent return zones 5 on the moving seat 800, the moving seat 800 will also move on the threaded rod 300, so that the moving seat 800 pushes the pushing plate 1000.

[0036] The stability structure includes a connecting plate 19 fixed to the bottom of the positioning column 12. An oil cylinder 14 is fixed in the inner groove 11. The oil cylinder 14 includes a pressing rod 15 and a first extrusion rod 16. The pressing rod 15 is fixedly connected to the connecting plate 19. A connecting frame is fixedly installed on the first extrusion rod 16. A limiting strip 18 is fixed on the side of the positioning column 12. A cutting plate 17 located above the limiting strip 18 is rotatably installed in the inner groove 11, and the cutting plate 17 is hinged to the connecting frame.

[0037] When the positioning column 12 moves on the triangular seat 500 on an inclined plane, the positioning column 12 will move outward from the inner groove 11, so that the movement of the positioning column 12 will drive the connecting plate 19 to move, thereby causing the connecting plate 19 to drive the extrusion rod 15 to move into the oil cylinder 14, so that the hydraulic oil in the oil cylinder 14 lifts the first extrusion rod 16. At this time, the first extrusion rod 16 will lift the cutting plate 17 and rotate around its middle as the axis. The end of the cutting plate 17 close to the positioning column 12 will descend, and as the positioning column 12 rises, the limit bar 18 will also rise, so the cutting plate 17 will be stuck between the limit bar 18 and the positioning column 12, so that a force can be applied to the positioning column 12 from the side, thereby ensuring the stability of the positioning column 12.

[0038] In addition, it should be noted that the position of the cutting plate 17 needs to be installed to match the rising height of the positioning column 12, that is, the cutting plate 17 will only be inserted between the positioning column 12 and the limit strip 18 after the positioning column 12 can be fully raised to support the workpiece. Therefore, this embodiment is only suitable for use when standard parts are positioned.

[0039] Operation steps: First, the position of the support arm on the slide 200 can be appropriately adjusted so that the workpiece can pass through the adjustable positioning mechanism 2, and the inner positioning ring 1 enters the workpiece, and one end of the workpiece is inserted into the limit frame 700 to fix the position; Subsequently, the motor is started to drive the threaded rod 300 to rotate, so that the threaded seat 400 drives the inner positioning ring 1 to move on the threaded rod 300, so that the multiple positioning columns 12 in the inner positioning ring 1 make an inclined motion on the triangular seat 500, so that the positioning columns 12 come out of the inner groove 11, and the workpiece is positioned and fixed from the inside; At the same time, when the threaded rod 300 rotates, the moving seat 800 moves on the threaded rod 300, so that the push plate 1000 pushes the piston rod 24 to move into the cylinder body 23, so that the second extrusion rod 25 moves, and several second extrusion rods 25 are welded from the outside of the workpiece to position and fix it; Finally, the laser welding device 100 is started to perform welding.

[0040] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0042] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A welding positioning auxiliary tool for welding equipment, characterized in that: It includes an inner positioning ring and an adjustable positioning mechanism provided on both sides of the workbench, the centers of the two circles are located on the same horizontal line, the inner positioning ring is located inside the workpiece to be welded, the adjustable positioning mechanism is located outside the workpiece to be welded, and a laser welding device fixed on the workbench is provided between adjacent adjustable positioning mechanisms; The inner positioning ring is movably arranged on the threaded rod through a threaded seat. The inner positioning ring is provided with a number of equally spaced inner grooves, in which a positioning column is slidably installed. A number of triangular seats are equally spaced on the circumference of the threaded rod. The triangular seats penetrate the inner groove and contact the ends of the positioning columns. Both sides of the positioning columns are provided with stabilizing structures. The adjustable positioning mechanism comprises an outer positioning ring fixed on the workbench, the outer positioning ring is provided with a plurality of outer grooves distributed at equal intervals, a cylinder body is installed on the outer groove, the cylinder body comprises a piston rod and a liquid outlet cylinder, a first and a second extrusion rod are arranged in the liquid outlet cylinder, a magnetorheological fluid is arranged in the cylinder body, the magnetorheological fluid carries particles, a first electromagnetic coil installed in the outer positioning ring is arranged outside the cylinder body, a movable moving seat is threadedly installed on the threaded rod, and a push plate for pushing the piston rod is fixed on the moving seat; A side positioning seat is fixed on the side of the cylinder body, and a U-shaped cavity connected to the cylinder body is arranged in the side positioning seat, and a pressure valve is installed at the connection point. The U-shaped cavity includes a reflux area, and the reflux area is connected to an auxiliary liquid cylinder fixed on the side positioning seat. A third extrusion rod is arranged in the auxiliary liquid cylinder, and a second electromagnetic coil is arranged outside the auxiliary liquid cylinder. The diameter of the particles carried by the magnetorheological fluid is smaller than the diameter of the U-shaped cavity.

2. A welding positioning auxiliary tool for welding equipment according to claim 1, characterized in that: The magnetorheological fluid in the cylinder body is a mixture of carbonyl iron powder, silicone oil and an anti-settling agent. The particles carried by the magnetorheological fluid are made of iron material, and the diameter of a single particle is smaller than the diameter of the auxiliary fluid cylinder.

3. The welding positioning auxiliary tool for welding equipment according to claim 1, characterized in that: A cooling cavity is arranged on the outer positioning ring, a cover body is arranged outside the outer positioning ring, and the cover body is provided with a water injection port communicated with the cooling cavity.

4. The welding positioning auxiliary tool for welding equipment according to claim 1, characterized in that: The liquid inlet and liquid outlet of the U-shaped cavity are both equipped with pressure valves, the setting threshold of the liquid inlet pressure valve is smaller than the setting threshold of the liquid outlet pressure valve, and the diameter of the liquid inlet of the U-shaped cavity is larger than the diameter of the liquid outlet, the side close to the reflux zone is the liquid outlet, and the side away from the reflux zone is the liquid inlet.

5. The welding positioning auxiliary tool for welding equipment according to claim 1, characterized in that: A slide is installed on the workbench, a support arm is installed on the slide, a motor, a triangular seat and a limit frame are fixedly installed on the support arm, a threaded rod is fixedly installed on the output end of the motor, the threaded seat is threadedly installed on the threaded rod, the inner positioning ring and the threaded seat are fixedly connected, the end of the positioning column is an inclined surface, the inclined surface and the triangular seat are fitted together, limit plates fixed in the inner groove are provided on both sides of the triangular seat, and a protective cover is also provided on the workbench.

6. A welding positioning auxiliary tool for welding equipment according to claim 5, characterized in that: A moving seat is threadedly installed on the threaded rod, and both sides of the moving seat are located between adjacent recirculation zones and are arranged in close contact with the recirculation zones. The threaded rod is provided with at least two inner positioning rings, and mounting rods penetrating the inner positioning rings are fixed on both sides of the moving seat, and push plates are fixedly installed on the mounting rods.

7. The welding positioning auxiliary tool for welding equipment according to claim 1, characterized in that: The stabilizing structure includes a connecting plate fixed at the bottom of the positioning column, an oil cylinder is fixed in the inner groove, the oil cylinder includes an extrusion rod and a first extrusion rod, the extrusion rod and the connecting plate are fixedly connected, the first extrusion rod is fixedly installed with a connecting frame, a limiting strip is fixed on the side of the positioning column, a cutting plate located above the limiting strip is rotatably installed in the inner groove, and the cutting plate is hinged to the connecting frame.

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