Auxiliary positioning device and method for electric arc welding of mechanical pipe fitting

Abstract

The invention discloses a mechanical pipe electric arc welding auxiliary positioning device and a method thereof, and belongs to the technical field of welding positioning, the mechanical pipe electric arc welding auxiliary positioning device comprises a base, a support is fixedly mounted on the top surface of the base, a mounting cover is fixedly mounted on the top surface of the support, and an adjusting motor is fixedly mounted at one end of the mounting cover; an adjusting screw rod is fixedly mounted at one end of an output shaft of the adjusting motor; the rotating assembly and the positioning mechanism are arranged in a matched mode, through the design, an inner supporting type positioning structure is adopted to replace traditional external clamping, pressing and other positioning structures, the positioning mode can guarantee the positioning effect and stability of the pipe fitting, external arc welding cannot be affected, the welding space is not occupied, and the welding efficiency is improved. And meanwhile, the positioning device further has a compensation positioning function, a good and stable positioning effect can be achieved when some pipe fittings with impurities and protrusion deformation on the inner walls are positioned, the positioning device is not affected by the interiors of the pipe fittings, and the application effect of the whole equipment is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding positioning, and in particular relates to a mechanical pipe arc welding auxiliary positioning device and a method thereof. Background Art

[0002] Arc welding, also known as arc welding, is a welding process that utilizes the high temperature of an electric arc. The arc is an intense, long-lasting electrical discharge generated between an electrode and a workpiece, or between two electrodes. During welding, the arc generates high temperatures (locally exceeding 6000°C), causing the metal at the weld joint to melt under the influence of the high temperature, forming a molten pool. This molten pool then cools and solidifies, thus achieving a metal connection. When arc welding some mechanical pipes, auxiliary positioning devices are required.

[0003] Chinese patent CN113798646B discloses a flange welding positioning tool, comprising a main shaft, a gripping handle provided at the rear end of the main shaft, a center hole provided within the main shaft, a center shaft provided within the center hole, a first connecting ring fixed to the outside of the main shaft, a second connecting ring rotatably provided at the front end of the center shaft, three sets of connecting arms provided at the outside of the first and second connecting rings, a pipe support seat provided between the outer ends of each set of connecting arms, and a first driving mechanism provided at the rear end of the center shaft for driving the center shaft to move along the center hole; a third connecting ring also fixed to the main shaft, a sleeve provided at the outer end of the rear end of the main shaft, a fourth connecting ring rotatably provided at the front end of the sleeve, three sets of support arms provided at the outside of the third and fourth connecting rings, a flange support assembly provided between the outer ends of each set of support arms, and a second driving mechanism provided at the rear end of the sleeve for driving the sleeve to move along the main shaft. The device has the advantages of low cost, ease of use, and high versatility. Although today's welding positioning structures can achieve positioning of welding materials, they generally achieve positioning through external clamping, pressing, etc. This method will cause some parts of the external material to contact the positioning structure. If the contact area is small, the positioning effect cannot be guaranteed. If the contact area is large, it will affect the fusion welding of the material, making it inconvenient to operate and unable to guarantee the welding quality. The actual application effect is not good and needs certain improvements. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that although the current welding positioning structure can realize the positioning of the welding material, it is generally achieved by external clamping, pressing, etc. This method will cause some parts of the external material to contact the positioning structure. If the contact area is small, the positioning effect cannot be guaranteed. If the contact area is large, it will affect the fusion welding of the material, making it inconvenient to operate, unable to guarantee the welding quality, and having poor actual application effect. A mechanical pipe arc welding auxiliary positioning device and method are proposed.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an auxiliary positioning device for arc welding of mechanical pipe fittings, comprising a base, a bracket fixedly mounted on the top surface of the base, a mounting cover fixedly mounted on the top surface of the bracket, an adjusting motor fixedly mounted on one end of the mounting cover, an adjusting screw fixedly mounted on one end of the output shaft of the adjusting motor, a movable cover mounted on the external thread of the adjusting screw, the movable cover being slidably mounted on an inner slide rail fixedly mounted on the inner wall of the mounting cover through a slide groove provided on the outer surface of the movable cover, a rotating motor fixedly mounted on the inside of the movable cover, an electric push rod fixedly mounted on the inner side of the rotating assembly, a telescopic screw fixedly mounted on one end of the output shaft of the electric push rod, and a top plate fixedly mounted on one end of the telescopic screw; The output shaft of the rotating motor is provided with a rotating assembly, and a positioning mechanism is provided on the outside of the rotating assembly. The positioning mechanism is used for positioning the inside of the welding mechanical pipe. The rotating assembly is used to drive the rotation of the positioning mechanism. A plurality of lateral support assemblies are movably installed on one side of the rotating assembly. The lateral support assemblies are used for lateral support of the positioning mechanism.

[0006] By adopting the above technical solution, an internal support positioning structure is adopted to replace the traditional external clamping, pressing and other positioning structures. This positioning method can not only ensure the positioning effect and stability of the pipe fittings, but also will not affect the external arc welding and does not occupy the welding space. At the same time, the positioning device also has a compensating positioning function, which can achieve a good and stable positioning effect when positioning some pipe fittings with impurities and bulge deformations on the inner wall, without being affected by the inside of the pipe fittings, thereby greatly improving the application effect of the overall equipment.

[0007] As a further description of the above technical solution: The rotating assembly includes a rotating shell, which is fixedly mounted on one end of the output shaft of the rotating motor, a plurality of connecting plates are fixedly mounted on the outer surface of the rotating shell, a side cover is fixedly mounted on one end of the rotating shell, a plurality of cross guide rails are fixedly mounted on one side outer wall of the side cover, and a limiting ring is fixedly mounted on the outer wall at the middle position of the side cover.

[0008] As a further description of the above technical solution: The positioning mechanism includes a positioning block, an assembly seat is fixedly installed on the bottom of the positioning block, a connecting rod is rotatably installed on the inner side of the assembly seat through a rotating shaft, one end of the connecting rod is rotatably connected to the connecting plate through a rotating shaft, a side plate is fixedly installed on the outer wall of one side of the positioning block, an installation inner groove is provided inside the positioning block, pressure-sensitive sensors are provided on both sides of the top surface of the positioning block, and one end of the other connecting rod is rotatably connected to the connecting block provided on the side wall of the top plate through a rotating shaft.

[0009] As a further description of the above technical solution: A displacement compensation component is provided inside the inner installation groove, and the displacement compensation component includes a drive motor and a bidirectional threaded rod. The drive motor is fixedly mounted on the bottom surface of the positioning block, and a drive gear is fixedly mounted on one end of the output shaft of the drive motor. The bidirectional threaded rod is horizontally rotatably mounted inside the inner installation groove.

[0010] As a further description of the above technical solution: A driven gear is fixedly installed at the middle position of the bidirectional threaded rod, a gear groove is provided on the bottom surface of the positioning block, and the driving gear and the driven gear are meshed with each other.

[0011] As a further description of the above technical solution: Sliders are threadedly installed on the outside of both ends of the bidirectional threaded rod, and the two slides slide inside the inner groove. Second connecting seats are fixedly installed on the top surfaces of the two slides, and folding telescopic frames are rotatably installed on the inner sides of the two second connecting seats through rotating shafts.

[0012] As a further description of the above technical solution: A first connecting seat is rotatably installed at one end of the folding telescopic frame through a rotating shaft, and a compensation positioning plate is fixedly installed on the top surface of the first connecting seat. A number of anti-slip serrations are provided on the top surfaces of the compensation positioning plate and the positioning block. The pressure-sensitive sensor is used to detect external pressure, transmit the signal to the processing terminal, and control the operation of the drive motor.

[0013] As a further description of the above technical solution: The lateral support assembly includes an engaging rack, which is slidably mounted on a cross guide rail through a cross slide groove provided at the bottom of the engaging rack. A sliding groove is provided inside the engaging rack, and a lateral support rod is movably installed in the sliding groove through a built-in spring. One end of the lateral support rod is located on the outside of the engaging rack, and one end of the lateral support rod is located on one side of the side plate.

[0014] As a further description of the above technical solution: A rotating tooth is rotatably mounted on the outside of the limiting ring, the telescopic screw is threadedly connected to an internal threaded hole provided inside the rotating tooth, and the rotating tooth is meshedly connected to a plurality of meshing racks.

[0015] The present invention also discloses a method for using a mechanical pipe arc welding auxiliary positioning device, comprising the following steps: S1. When actually welding pipe fittings, the pipe fittings are first placed on the outside of multiple positioning mechanisms. At this time, the electric push rod is directly controlled to open, and the telescopic screw is pushed to move. The top plate can move synchronously. When the top plate moves, it can push the inclined connecting rods to deflect until the connecting rods are in a vertical state. During the deflection of the connecting rods, the multiple positioning blocks can be pushed to move outward until the multiple positioning blocks contact and tightly squeeze the inner wall of the pipe fitting, thereby completing the positioning of the pipe fitting; S2. During the positioning process, if there is a concave or convex structure on the inner wall of the pipe fitting, and one of the positioning blocks only squeezes the convex structure, then the positioning block does not fully contact the inner wall of the pipe fitting. Since the positioning blocks move synchronously, if this happens, the displacement of the other positioning blocks is not enough to fully fit the inner wall of the pipe fitting; S3. At this time, the positioned pipe will tilt, and the pressure-sensitive sensor on the surface of the positioning block can detect the different pressure values ​​in time. At this time, the drive motor can be directly controlled to start and drive the drive gear to rotate. The drive gear can drive the bidirectional threaded rod with the driven gear to rotate. When the bidirectional threaded rod rotates, the two sliders can be driven to move closer to each other and toward the middle. At this time, the two folding telescopic frames can be pushed to deflect at an angle, thereby ejecting the compensation positioning plate. The ejected compensation positioning plate can replace the positioning block that is not fully in contact with the inner wall of the pipe, achieving stable contact with the inner wall of the pipe. At this time, the positioned pipe can be automatically made horizontal. S4. When the telescopic screw is pushed to move, it can synchronously drive the rotating gear connected to it by thread to rotate. When the rotating gear rotates, it can drive the multiple meshing racks on the outside of it to move synchronously outward. When one end of the lateral support rod contacts the side plate of the positioning mechanism, it can exert a certain lateral force on the side plate, thereby exerting a certain lateral support force on the positioning mechanism. Secondly, it can further provide some positioning external support force for the inner wall of the pipe fitting. S5. After the pipe fitting is installed, if it is necessary to move the pipe fitting horizontally, directly turn on the adjusting motor to drive the adjusting screw to rotate, thereby controlling the movement of the movable cover, thereby controlling the displacement of the entire pipe fitting. If it is necessary to control the rotation of the pipe fitting itself, the rotating motor can also be turned on to drive the rotating assembly to rotate, thereby controlling the rotation of the entire installed pipe fitting, and cooperating with the arc welding operation to achieve all-round welding of the pipe fitting without dead angles.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, a rotating assembly and a positioning mechanism are provided in a matching manner. When the pipe is actually welded, the pipe is first sleeved on the outside of the multiple positioning mechanisms. At this time, the electric push rod is directly controlled to open, and the telescopic screw is pushed to move. The top plate can move synchronously. When the top plate moves, the inclined connecting rods can be deflected until the connecting rods are in a vertical state. During the deflection of the connecting rods, the multiple positioning blocks can be pushed to move outward until the multiple positioning blocks contact and tightly squeeze the inner wall of the pipe, thereby completing the positioning of the pipe. During the positioning process, if there is a concave and convex structure on the inner wall of the pipe, and one of the positioning blocks only squeezes the convex structure, the positioning block does not completely contact the inner wall of the pipe. Since the positioning blocks move synchronously, if such a situation occurs, the displacement of the other positioning blocks is not enough to completely fit the inner wall of the pipe. At this time, the positioned pipe will tilt, and the pressure-sensitive sensor on the surface of the positioning block can timely detect that the pressure values ​​are different. When the gear train is in gear, the two guide wheels are rotated to move relative to each other, and the two guide wheels are rotated relative to each other to move relative to each other, so that the gear train can move relative to each other and the two guide wheels can move relative to each other to move relative to each other.

[0017] 2. In the present invention, a plurality of lateral support assemblies are provided in a matching manner. When the telescopic screw is pushed to move, it can synchronously drive the rotating gear connected to the screw thread to rotate. When the rotating gear rotates, it can drive the multiple meshing racks engaged on the outside thereof to move synchronously outward. When one end of the lateral support rod contacts the side plate of the positioning mechanism, it can give the side plate a certain lateral force, thereby giving the positioning mechanism a certain lateral support force. Secondly, it can further provide some positioning mechanism with some external support force for the inner wall of the pipe, further improving the stability of the pipe positioning and the stability of the positioning mechanism itself, and improving the application effect of the equipment.

[0018] 3. In the present invention, by designing the entire equipment to be adjustable, after the pipe fitting is installed, if it is necessary to make the pipe fitting horizontally displaced, the adjusting motor is directly turned on to drive the adjusting screw to rotate, thereby controlling the movement of the movable cover, thereby controlling the displacement of the entire pipe fitting. When it is necessary to control the rotation of the pipe fitting itself, the rotating motor can also be turned on to drive the rotating assembly to rotate, thereby controlling the rotation of the entire installed pipe fitting, cooperating with the arc welding operation, to achieve all-round and dead-angle-free welding of the pipe fitting. The overall adjustable operation of the equipment is strong, which can improve the arc welding efficiency of the pipe fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a mechanical pipe arc welding auxiliary positioning device.

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of a mechanical pipe arc welding auxiliary positioning device from another angle.

[0021] Figure 3 This is a schematic diagram of the exploded three-dimensional structure of a mechanical pipe arc welding auxiliary positioning device.

[0022] Figure 4 The diagram is a partially cutaway three-dimensional structural diagram of a movable cover and a rotating assembly in an auxiliary positioning device for arc welding of mechanical pipe fittings.

[0023] Figure 5 This is a first exploded three-dimensional structural diagram of a rotating assembly and a positioning mechanism in an auxiliary positioning device for arc welding of mechanical pipe fittings.

[0024] Figure 6 This is a second exploded three-dimensional structural diagram of a rotating assembly and a positioning mechanism in an auxiliary positioning device for arc welding of mechanical pipe fittings.

[0025] Figure 7 This is a schematic diagram of the exploded three-dimensional structure of the positioning mechanism in a mechanical pipe arc welding auxiliary positioning device.

[0026] Figure 8 This is a schematic diagram of the exploded three-dimensional structure of a displacement compensation component in an auxiliary positioning device for arc welding of mechanical pipe fittings.

[0027] Figure 9 This is a schematic diagram of the exploded three-dimensional structure of a lateral support assembly in a mechanical pipe arc welding auxiliary positioning device.

[0028] Figure 10 An auxiliary positioning device for arc welding of mechanical pipe fittings Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0029] Description of reference numerals: 1. Base; 2. Bracket; 3. Adjustment motor; 4. Mounting cover; 5. Moving cover; 6. Rotating assembly; 61. Rotating housing; 62. Connecting plate; 63. Side cover; 64. Limiting ring; 65. Cross guide; 7. Positioning mechanism; 71. Pressure sensor; 72. Positioning block; 73. Side plate; 74. Connecting rod; 75. Anti-slip serrations; 76. Mounting inner groove; 77. Displacement compensation assembly; 771. Compensation positioning plate; 772. First connecting seat; 773. Folding telescopic frame; 774. Slider; 775. Driving motor; 776. Driving gear; 777. Driven gear; 778. Bidirectional threaded rod; 779. Second connecting seat; 78. Assembly seat; 8. Lateral support assembly; 81. Engaging rack; 82. Internal spring; 83. Lateral support rod; 9. Rotating gear; 10. Adjusting screw; 11. Inner slide rail; 12. Rotating motor; 13. Electric push rod; 14. Top plate; 15. Telescopic screw. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] See also Figures 1-6 The present invention provides a technical solution: an auxiliary positioning device for arc welding of mechanical pipe fittings, comprising a base 1, a bracket 2 is fixedly mounted on the top surface of the base 1, a mounting cover 4 is fixedly mounted on the top surface of the bracket 2, an adjusting motor 3 is fixedly mounted on one end of the mounting cover 4, an adjusting screw 10 is fixedly mounted on one end of the output shaft of the adjusting motor 3, a movable cover 5 is mounted on the external thread of the adjusting screw 10, the movable cover 5 is slidably mounted on an inner slide rail 11 fixedly mounted on the inner wall of the mounting cover 4 through a slide groove provided on its outer surface, a rotating motor 12 is fixedly mounted inside the movable cover 5, an electric push rod 13 is fixedly mounted on the inner side of the rotating assembly 6, a telescopic screw 15 is fixedly mounted on one end of the output shaft of the electric push rod 13, and a top plate 14 is fixedly mounted on one end of the telescopic screw 15.

[0032] The specific implementation method is as follows: after the pipe fitting is installed, if it is necessary to make the pipe fitting horizontally displaced, the adjusting motor 3 is directly turned on to drive the adjusting screw 10 to rotate, thereby controlling the movement of the movable cover 5, thereby controlling the displacement of the entire pipe fitting. When it is necessary to control the rotation of the pipe fitting itself, the rotating motor 12 can also be turned on to drive the rotating assembly 6 to rotate, thereby controlling the rotation of the entire installed pipe fitting, cooperating with the arc welding operation, to achieve all-round welding of the pipe fitting without dead angles.

[0033] The output shaft of the rotating motor 12 is provided with a rotating component 6, and a positioning mechanism 7 is provided on the outside of the rotating component 6. The positioning mechanism 7 is used for the inner positioning of the welding mechanical pipe. The rotating component 6 is used to drive the rotation of the positioning mechanism 7. A plurality of lateral support components 8 are movably installed on one side of the rotating component 6. The lateral support components 8 are used for the lateral support of the positioning mechanism 7.

[0034] The rotating assembly 6 includes a rotating shell 61, which is fixedly mounted on one end of the output shaft of the rotating motor 12. A plurality of connecting plates 62 are fixedly mounted on the outer surface of the rotating shell 61. A side cover 63 is fixedly mounted on one end of the rotating shell 61. A plurality of cross guide rails 65 are fixedly mounted on one side outer wall of the side cover 63. A limiting ring 64 is fixedly mounted on the outer wall at the middle position of the side cover 63.

[0035] See also Figure 7 and Figure 8 The positioning mechanism 7 includes a positioning block 72, and an assembly seat 78 is fixedly installed at the bottom of the positioning block 72. A connecting rod 74 is rotatably installed on the inner side of the assembly seat 78 through a rotating shaft. One end of the connecting rod 74 is rotatably connected to the connecting plate 62 through a rotating shaft. A side plate 73 is fixedly installed on the outer wall of one side of the positioning block 72. An installation inner groove 76 is provided inside the positioning block 72. Pressure-sensitive sensors 71 are provided on both sides of the top surface of the positioning block 72. One end of the other connecting rod 74 is rotatably connected to the connecting block provided on the side wall of the top plate 14 through a rotating shaft. A displacement compensation component 77 is provided inside the installation inner groove 76.

[0036] The displacement compensation assembly 77 includes a drive motor 775 and a bidirectional threaded rod 778. The drive motor 775 is fixedly mounted on the bottom surface of the positioning block 72. A drive gear 776 is fixedly mounted on one end of the output shaft of the drive motor 775. The bidirectional threaded rod 778 is mounted to the inside of the mounting inner groove 76 for transverse rotation. A driven gear 777 is fixedly mounted at the middle position of the bidirectional threaded rod 778. A gear groove is provided on the bottom surface of the positioning block 72. The drive gear 776 and the driven gear 777 are meshed with each other. Slide blocks 774 are threadedly mounted on the outside of both ends of the bidirectional threaded rod 778. The two slide blocks 77 4 slides inside the mounting inner groove 76. The top surfaces of the two sliders 774 are fixedly mounted with second connecting seats 779. The inner sides of the two second connecting seats 779 are rotatably mounted with folding telescopic frames 773 via rotating shafts. One end of the folding telescopic frame 773 is rotatably mounted with a first connecting seat 772 via a rotating shaft. A compensation positioning plate 771 is fixedly mounted on the top surface of the first connecting seat 772. The top surfaces of the compensation positioning plate 771 and the positioning block 72 are both provided with a plurality of anti-slip serrations 75. The pressure-sensitive sensor 71 is used to detect external pressure and transmit the signal to the processing terminal to control the operation of the drive motor 775.

[0037] The specific implementation method is as follows: when actually welding pipe fittings, the pipe fittings are first put on the outside of multiple positioning mechanisms 7. At this time, the electric push rod 13 is directly controlled to open, and the telescopic screw 15 is pushed to move. The top plate 14 can move synchronously. When moving, the top plate 14 can push the inclined connecting rods 74 to deflect until the connecting rods 74 are in a vertical state. During the deflection of the connecting rods 74, the multiple positioning blocks 72 can be pushed to move outward until the multiple positioning blocks 72 contact and tightly squeeze the inner wall of the pipe fitting, thereby completing the positioning of the pipe fitting. During the positioning process, if there is a concave and convex structure on the inner wall of the pipe fitting, and one of the positioning blocks 72 only squeezes the convex structure, the positioning block 72 is not completely in contact with the inner wall of the pipe fitting. Since the positioning blocks 72 move synchronously, if such a situation occurs, the others The displacement of the positioning block 72 is not enough to completely fit the inner wall of the pipe. At this time, the positioned pipe will tilt, and the pressure-sensitive sensor 71 on the surface of the positioning block 72 can detect in time that the pressure values ​​are different. At this time, the drive motor 775 can be directly controlled to start and drive the drive gear 776 to rotate. The drive gear 776 can drive the bidirectional threaded rod 778 with the driven gear 777 to rotate. When the bidirectional threaded rod 778 rotates, the two sliders 774 can be driven to move closer to each other toward the middle. At this time, the two folding telescopic frames 773 can be pushed to deflect at an angle, thereby ejecting the compensation positioning plate 771. The ejected compensation positioning plate 771 can replace the positioning block 72 that is not completely in contact with the inner wall of the pipe, and achieve stable contact with the inner wall of the pipe. At this time, the positioned pipe can be automatically made horizontal and firmly positioned.

[0038] Through this design, an internal support positioning structure is adopted to replace the traditional external clamping, pressing and other positioning structures. This positioning method can not only ensure the positioning effect and stability of the pipe fittings, but also will not affect the external arc welding and does not occupy the welding space. At the same time, the positioning device also has a compensating positioning function, which can achieve a good and stable positioning effect when positioning some pipe fittings with impurities and protrusions on the inner wall. It is not affected by the inside of the pipe fittings, which greatly improves the application effect of the overall equipment.

[0039] See also Figure 9 and Figure 10 The lateral support assembly 8 includes an engaging rack 81, which is slidably mounted on the cross guide rail 65 through a cross slide groove set at its bottom. A sliding groove is set inside the engaging rack 81, and a lateral support rod 83 is movably installed in the sliding groove through a built-in spring 82. One end of the lateral support rod 83 is located on the outside of the engaging rack 81, and one end of the lateral support rod 83 is located on one side of the side plate 73.

[0040] The outer portion of the limiting ring 64 is provided with a rotating gear 9, and the telescopic screw 15 is threadedly connected to the internal threaded hole provided inside the rotating gear 9. The rotating gear 9 is meshed with a plurality of meshing racks 81. Its specific implementation is as follows: when the telescopic screw 15 is pushed to move, it can synchronously drive the rotating gear 9 threadedly connected to it to rotate. When the rotating gear 9 rotates, it can drive the multiple meshing racks 81 engaged on its outside to move synchronously outward. When one end of the lateral support rod 83 contacts the side plate 73 of the positioning mechanism 7, it can give the side plate 73 a certain lateral force, thereby giving the positioning mechanism 7 a certain lateral support force. Secondly, it can further provide some positioning mechanism 7 with some external support force for the inner wall of the pipe, further improving the stability of the pipe positioning and the stability of the positioning mechanism 7 itself, thereby improving the application effect of the equipment.

[0041] The present invention also discloses a method for using a mechanical pipe arc welding auxiliary positioning device, comprising the following steps: S1. When actually welding pipe fittings, the pipe fittings are first placed on the outside of the multiple positioning mechanisms 7. At this time, the electric push rod 13 is directly controlled to open, pushing the telescopic screw 15 to move, and the top plate 14 can move synchronously. When the top plate 14 moves, it can push the inclined connecting rods 74 to deflect until the connecting rods 74 are in a vertical state. During the deflection process of the connecting rods 74, the multiple positioning blocks 72 can be pushed to move outward until the multiple positioning blocks 72 contact and tightly squeeze the inner wall of the pipe fitting, thereby completing the positioning of the pipe fitting; S2. During the positioning process, if there is a concave or convex structure on the inner wall of the pipe, and one of the positioning blocks 72 only squeezes the convex structure, then the positioning block 72 does not fully contact the inner wall of the pipe. Since the positioning blocks 72 move synchronously, if this happens, the displacement of the other positioning blocks 72 is insufficient to fully fit the inner wall of the pipe. S3. At this time, the positioned pipe will be tilted, and the pressure-sensitive sensor 71 on the surface of the positioning block 72 can detect in time that the pressure values ​​are different. At this time, the driving motor 775 can be directly controlled to start and drive the driving gear 776 to rotate. The driving gear 776 can drive the bidirectional threaded rod 778 with the driven gear 777 to rotate. When the bidirectional threaded rod 778 rotates, the two sliders 774 can be driven to move closer to each other and toward the middle. At this time, the two folding telescopic frames 773 can be pushed to deflect at an angle, thereby ejecting the compensation positioning plate 771. The ejected compensation positioning plate 771 can replace the positioning block 72 that is not fully in contact with the inner wall of the pipe, and achieve stable contact with the inner wall of the pipe. At this time, the positioned pipe can be automatically made horizontal. S4. When the telescopic screw 15 is pushed to move, it can synchronously drive the rotating gear 9 threadedly connected to it to rotate. When the rotating gear 9 rotates, it can drive the multiple meshing racks 81 on the outside thereof to move synchronously outward. When one end of the lateral support rod 83 contacts the side plate 73 of the positioning mechanism 7, it can exert a certain lateral force on the side plate 73, thereby exerting a certain lateral support force on the positioning mechanism 7. Secondly, it can further provide some positioning external support force of the positioning mechanism 7 on the inner wall of the pipe. S5. After the pipe fitting is installed, if it is necessary to move the pipe fitting horizontally, directly turn on the adjusting motor 3 to drive the adjusting screw 10 to rotate, thereby controlling the movement of the movable cover 5, thereby controlling the displacement of the entire pipe fitting. When it is necessary to control the rotation of the pipe fitting itself, the rotating motor 12 can also be turned on to drive the rotating assembly 6 to rotate, thereby controlling the rotation of the entire installed pipe fitting, cooperating with the arc welding operation to achieve all-round welding of the pipe fitting without dead angles.

[0042] Working principle: When actually welding pipe fittings, the pipe fittings are first put on the outside of multiple positioning mechanisms 7. At this time, the electric push rod 13 is directly controlled to open, pushing the telescopic screw 15 to move, and the top plate 14 can move synchronously. When moving, the top plate 14 can push the inclined connecting rods 74 to deflect until the connecting rods 74 are in a vertical state. During the deflection of the connecting rods 74, the multiple positioning blocks 72 can be pushed to move outward until the multiple positioning blocks 72 contact and tightly squeeze the inner wall of the pipe fitting, thereby completing the positioning of the pipe fitting; during the positioning process, if there is a concave and convex structure on the inner wall of the pipe fitting, and one of the positioning blocks 72 only squeezes the convex structure, then the positioning block 72 is not completely in contact with the inner wall of the pipe fitting, and since the positioning blocks 72 move synchronously, if such a situation occurs, the other The displacement of the positioning block 72 is not enough to completely fit the inner wall of the pipe; at this time, the positioned pipe will be tilted, and the pressure-sensitive sensor 71 on the surface of the positioning block 72 can detect in time that the pressure values ​​are different. At this time, the drive motor 775 can be directly controlled to start and drive the drive gear 776 to rotate. The drive gear 776 can drive the bidirectional threaded rod 778 with the driven gear 777 to rotate. When the bidirectional threaded rod 778 rotates, the two sliders 774 can be driven to move closer to each other and toward the middle. At this time, the two folding telescopic frames 773 can be pushed to deflect at an angle, thereby ejecting the compensation positioning plate 771. The ejected compensation positioning plate 771 can replace the positioning block 72 that is not completely in contact with the inner wall of the pipe, and achieve stable contact with the inner wall of the pipe. At this time, the positioned pipe can be automatically made horizontal. When the telescopic screw 15 is pushed to move, it can synchronously drive the rotating gear 9 threadedly connected thereto to rotate. When the rotating gear 9 rotates, it can drive the multiple meshing racks 81 meshed on the outside thereof to move synchronously outward. When one end of the lateral support rod 83 contacts the side plate 73 of the positioning mechanism 7, it can exert a certain lateral force on the side plate 73, thereby exerting a certain lateral support force on the positioning mechanism 7. Secondly, it can further provide some positioning external support force of the positioning mechanism 7 on the inner wall of the pipe. After the pipe fitting is installed, if it is necessary to move the pipe fitting horizontally, the adjusting motor 3 is directly turned on to drive the adjusting screw 10 to rotate, thereby controlling the movement of the movable cover 5, thereby controlling the displacement of the entire pipe fitting. When it is necessary to control the rotation of the pipe fitting itself, the rotating motor 12 can also be turned on to drive the rotating assembly 6 to rotate, thereby controlling the rotation of the entire installed pipe fitting, cooperating with the arc welding operation, to achieve all-round welding of the pipe fitting without dead angles.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A mechanical pipe arc welding auxiliary positioning device, comprising a base, characterized in that: A bracket is fixedly mounted on the top surface of the base, a mounting cover is fixedly mounted on the top surface of the bracket, an adjusting motor is fixedly mounted on one end of the mounting cover, an adjusting screw is fixedly mounted on one end of the output shaft of the adjusting motor, a moving cover is mounted on the external thread of the adjusting screw, the moving cover is slidably mounted on an inner slide rail fixedly mounted on the inner wall of the mounting cover through a slide groove provided on the outer surface of the moving cover, a rotating motor is fixedly mounted on the inside of the moving cover, an electric push rod is fixedly mounted on the inner side of the rotating assembly, a telescopic screw is fixedly mounted on one end of the output shaft of the electric push rod, and a top plate is fixedly mounted on one end of the telescopic screw; The output shaft of the rotating motor is provided with a rotating assembly, and a positioning mechanism is provided on the outside of the rotating assembly. The positioning mechanism is used for positioning the inside of the welding mechanical pipe fittings. The rotating assembly is used to drive the rotation of the positioning mechanism. Multiple lateral support assemblies are movably installed on one side of the rotating assembly. The lateral support assemblies are used for lateral support of the positioning mechanism.

2. The mechanical pipe arc welding auxiliary positioning device according to claim 1, characterized in that: The rotating assembly includes a rotating shell, which is fixedly mounted on one end of the output shaft of the rotating motor. A plurality of connecting plates are fixedly mounted on the outer surface of the rotating shell. A side cover is fixedly mounted on one end of the rotating shell. A plurality of cross guide rails are fixedly mounted on one side outer wall of the side cover. A limit ring is fixedly mounted on the outer wall in the middle position of the side cover.

3. The mechanical pipe arc welding auxiliary positioning device according to claim 2, characterized in that: The positioning mechanism includes a positioning block, an assembly seat is fixedly installed on the bottom of the positioning block, a connecting rod is rotatably installed on the inner side of the assembly seat through a rotating shaft, one end of the connecting rod is rotatably connected to the connecting plate through a rotating shaft, a side plate is fixedly installed on the outer wall of one side of the positioning block, an installation inner groove is provided inside the positioning block, pressure-sensitive sensors are provided on both sides of the top surface of the positioning block, and one end of the other connecting rod is rotatably connected to the connecting block provided on the side wall of the top plate through a rotating shaft.

4. The mechanical pipe arc welding auxiliary positioning device according to claim 3, characterized in that: A displacement compensation component is provided inside the inner groove, and the displacement compensation component includes a drive motor and a bidirectional threaded rod. The drive motor is fixedly mounted on the bottom surface of the positioning block, and a drive gear is fixedly mounted on one end of the output shaft of the drive motor. The bidirectional threaded rod is horizontally rotatably mounted inside the inner groove.

5. The mechanical pipe arc welding auxiliary positioning device according to claim 4, characterized in that: A driven gear is fixedly installed at the middle position of the bidirectional threaded rod, a gear groove is provided on the bottom surface of the positioning block, and the driving gear and the driven gear are meshed and connected with each other.

6. The mechanical pipe arc welding auxiliary positioning device according to claim 5, characterized in that: Sliders are threadedly installed on the outside of both ends of the bidirectional threaded rod, and both slides slide inside the installation inner groove. Second connecting seats are fixedly installed on the top surfaces of the two slides, and folding telescopic frames are installed on the inner sides of the two second connecting seats through rotating shafts.

7. The mechanical pipe arc welding auxiliary positioning device according to claim 6, characterized in that: One end of the folding telescopic frame is rotatably installed with a first connecting seat through a rotating shaft. A compensation positioning plate is fixedly installed on the top surface of the first connecting seat. Several anti-slip serrations are provided on the top surfaces of the compensation positioning plate and the positioning block. The pressure-sensitive sensor is used to detect external pressure, transmit the signal to the processing terminal, and control the operation of the drive motor.

8. The mechanical pipe arc welding auxiliary positioning device according to claim 7, characterized in that: The lateral support assembly includes an engaging rack, which is slidably mounted on the cross guide rail through a cross slide groove set at the bottom of the engaging rack. A sliding groove is set inside the engaging rack, and a lateral support rod is movably installed in the sliding groove through a built-in spring. One end of the lateral support rod is located on the outside of the engaging rack, and one end of the lateral support rod is located on one side of the side plate.

9. The mechanical pipe arc welding auxiliary positioning device according to claim 8, characterized in that: The outer portion of the limiting ring is rotatably mounted with a rotating tooth, the telescopic screw is threadedly connected to the internal threaded hole provided inside the rotating tooth, and the rotating tooth is meshedly connected to a plurality of meshing racks.

10. A method for using a mechanical pipe arc welding auxiliary positioning device according to any one of claims 1 to 9, characterized in that: The steps include: S1. When actually welding pipe fittings, the pipe fittings are first placed on the outside of multiple positioning mechanisms. At this time, the electric push rod is directly controlled to open, and the telescopic screw is pushed to move. The top plate can move synchronously. When the top plate moves, it can push the inclined connecting rods to deflect until the connecting rods are in a vertical state. During the deflection of the connecting rods, the multiple positioning blocks can be pushed to move outward until the multiple positioning blocks contact and tightly squeeze the inner wall of the pipe fitting, thereby completing the positioning of the pipe fitting; S2. During the positioning process, if there is a concave or convex structure on the inner wall of the pipe fitting, and one of the positioning blocks only squeezes the convex structure, then the positioning block does not fully contact the inner wall of the pipe fitting. Since the positioning blocks move synchronously, if this happens, the displacement of the other positioning blocks is not enough to fully fit the inner wall of the pipe fitting; S3. At this time, the positioned pipe will tilt, and the pressure-sensitive sensor on the surface of the positioning block can detect the different pressure values ​​in time. At this time, the drive motor can be directly controlled to start and drive the drive gear to rotate. The drive gear can drive the bidirectional threaded rod with the driven gear to rotate. When the bidirectional threaded rod rotates, the two sliders can be driven to move closer to each other and toward the middle. At this time, the two folding telescopic frames can be pushed to deflect at an angle, thereby ejecting the compensation positioning plate. The ejected compensation positioning plate can replace the positioning block that is not fully in contact with the inner wall of the pipe, achieving stable contact with the inner wall of the pipe. At this time, the positioned pipe can be automatically made horizontal. S4. When the telescopic screw is pushed to move, it can synchronously drive the rotating gear connected to it by thread to rotate. When the rotating gear rotates, it can drive the multiple meshing racks on the outside of it to move synchronously outward. When one end of the lateral support rod contacts the side plate of the positioning mechanism, it can exert a certain lateral force on the side plate, thereby exerting a certain lateral support force on the positioning mechanism. Secondly, it can further provide some positioning external support force for the inner wall of the pipe fitting. S5. After the pipe fitting is installed, if it is necessary to move the pipe fitting horizontally, directly turn on the adjusting motor to drive the adjusting screw to rotate, thereby controlling the movement of the movable cover, thereby controlling the displacement of the entire pipe fitting. If it is necessary to control the rotation of the pipe fitting itself, the rotating motor can also be turned on to drive the rotating assembly to rotate, thereby controlling the rotation of the entire installed pipe fitting, and cooperating with the arc welding operation to achieve all-round welding of the pipe fitting without dead angles.

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