A deep-hole longitudinal oscillating submerged arc welding device

Abstract

This invention belongs to the field of automatic welding equipment, and particularly relates to a deep-hole longitudinal oscillating submerged arc welding device. Its features include a fixed frame, a floating frame, a welding torch body, a wire feeder, a hopper, and a longitudinal oscillating mechanism. The fixed frame is equipped with a slide rail, and a slider is mounted on the slide rail. The slider is connected to the floating frame, and the floating frame is equipped with a wire feeder mounting base. One end of the floating frame is connected to the welding torch body via a welding torch holder, and the wire feeder mounting base is connected to the welding torch body via a welding wire guide. The longitudinal oscillating mechanism includes a speed-regulating DC motor, a connecting base, a swing wheel, a connecting rod, and a hinge. The output shaft of the speed-regulating DC motor is connected to the swing wheel via a coupling and a vertical shaft. The vertical shaft is connected to the connecting base via a bearing. One end of the connecting rod is hinged to a connecting block on the swing wheel, and the other end of the connecting rod is movably connected to the hinge, which is connected to the floating frame. The advantages of this invention are: it is suitable for deep-hole welding operations of 500mm and above, and it is particularly advantageous for welding pipe walls.

Description

Technical Field

[0001] This invention belongs to the field of automatic welding equipment, and particularly relates to a deep hole longitudinal oscillating submerged arc welding device. Background Technology

[0002] Deep hole surfacing is currently widely used for corrosion-resistant composite surfacing of the inner surface of pressure vessels, wear-resistant composite surfacing of pipes, pipe molds, and cylinders, and is a common method for repair and remanufacturing. To improve surfacing production efficiency, stainless steel strip electrode surfacing is often used. However, it is difficult to roll hard-faced high-alloy materials into steel strips, so single-pass spiral surfacing with flux-cored wire is often used, resulting in low production efficiency. To improve the efficiency and welding quality of deep hole hard-face surfacing, the oscillating surfacing device of this invention can be used. This device can complete the overall surfacing of deep hole cylinders with a diameter greater than 500mm and a length of more than 6 meters. This equipment mainly uses transverse oscillating surfacing, which can significantly improve surfacing efficiency by 1-1.5 times. To improve the efficiency of deep hole surfacing with a diameter greater than 500mm, considering the narrow space, in addition to installing a vertical welding torch and wire feeder, it is also necessary to consider a 90° arc-shaped wire guide tube, feeding tube, welding cable, cooling water pipe, as well as a linear motion oscillator and a flux hopper in front of the machine. These greatly limit the allowable space, requiring a very compact structural design to accommodate oscillating surfacing.

[0003] How to make the flux delivery head swing longitudinally and have a compact enough structure to go deep into the hole to complete continuous welding has always been a technical challenge for deep hole oscillating submerged arc welding, especially the longitudinal (axial) back-and-forth swing, for which there has been no better solution. Summary of the Invention

[0004] The purpose of this invention is to provide a deep-hole longitudinal oscillating submerged arc welding device that overcomes the shortcomings of existing technologies. It adopts an integrated welding torch structure, which highly integrates the welding torch with the wire feeder and the longitudinal oscillating mechanism. It is suitable for deep-hole oscillating welding operations with a diameter of 500mm or more, and has great advantages for pipe wall welding operations. It can oscillate longitudinally in the deep hole, and the oscillation amplitude and oscillation frequency are adjustable. The oscillation speed-regulating DC motor only needs to move in one direction, which can avoid the disadvantages of conventional oscillators that repeatedly switch polarity and the speed-regulating DC motor that repeatedly switch forward and reverse, which is easy to be damaged.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A deep-hole longitudinal oscillating submerged arc welding device is characterized by comprising a fixed frame, a floating frame, a welding torch body, a wire feeder, a hopper, and a longitudinal oscillating mechanism. The fixed frame is equipped with a slide rail, on which a slider is mounted. The slider is connected to the floating frame. The floating frame is equipped with a wire feeder mounting base, on which the wire feeder is connected. The front end of the floating frame is connected to the welding torch body and the hopper via a welding torch holder. The wire feeder mounting base and the welding torch body are connected via a welding wire guide. The longitudinal oscillating mechanism includes a speed-regulating DC motor, a connecting seat, a swing wheel, a connecting rod, and a hinge. The speed-regulating DC motor is connected to the fixed frame via a motor base. The output shaft of the speed-regulating DC motor is connected to the swing wheel via a coupling and a vertical shaft. The vertical shaft and the connecting seat are connected via a bearing. One end of the connecting rod is hinged to the slider on the swing wheel, and the other end of the connecting rod is movably connected to the hinge. The hinge is connected to the floating frame.

[0007] Furthermore, the floating frame is also equipped with a vertical frame, and the vertical frame is equipped with a flux feeding hose fixing ring.

[0008] Furthermore, the surface of the balance wheel is provided with a T-shaped through groove along its diameter, and a connecting block is provided in the T-shaped through groove. The connecting block is fixed at any position in the T-shaped through groove according to the set swing amplitude.

[0009] Furthermore, the connecting rod is composed of two sections, front and rear, which are connected by a threaded sleeve, and the length is adjustable.

[0010] Furthermore, the wire feeder mounting base is also provided with a protective plate that can separate the longitudinal swing mechanism from the wire feeder.

[0011] Furthermore, the top of the hopper is provided with a pipe joint for connecting the flux feeding hose, and the bottom outlet of the hopper is connected to a heat-resistant transparent hose on one side of the welding torch body.

[0012] Furthermore, a cooling water pipe is provided on each side of the welding torch body. The cooling water pipe is connected to the fixed frame and is connected to the cooling water injection interface on the fixed frame.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The integrated structure integrates the welding torch body with the flux hopper, wire feeder, and longitudinal oscillation mechanism, making it suitable for deep hole surfacing operations of 500mm and above. It has great advantages for pipe wall surfacing operations and can completely replace strip electrode surfacing. Its surfacing speed and efficiency, the range of surfacing materials to be selected, and the adjustable surfacing weld width are all much better than strip electrode surfacing.

[0015] The welding torch can swing longitudinally, and can swing in the direction of hole depth. The swing amplitude and swing frequency are adjustable. The swing speed-regulating DC motor only needs to move in one direction, which can avoid the disadvantage of the speed-regulating DC motor overheating and being easily damaged when switching directions.

[0016] 3) The longitudinal swing mechanism is compact and has a large load capacity. It can drive the water-cooled welding gun and flux hopper to swing and weld synchronously, ensuring that the cables, water pipes and flux pipes are unobstructed and do not get stuck or tangled when swinging and welding in deep holes.

[0017] 4) The structure of the longitudinal swing mechanism makes it easier to adjust the frequency and swing amplitude, and makes wire feeding easier to maintain. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0019] Figure 2 This is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure from a two-dimensional perspective of an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the longitudinal swing mechanism in an embodiment of the present invention; the connecting seat is hidden and not shown.

[0022] Figure 5 This is a schematic diagram of the connection relationship between the balance wheel and the connecting rod in an embodiment of the present invention.

[0023] In the diagram: 1-Fixed frame, 2-Floating frame, 3-Welding gun body, 4-Wire feeder, 5-Hopper, 6-Longitudinal swing mechanism, 7-Slide rail, 8-Slider, 9-Wire feeder mounting base, 10-Welding gun holder, 11-Welding wire guide tube, 12-Speed-regulating DC motor, 13-Connecting seat, 14-Swing wheel, 15-Connecting rod, 16-Hinge seat, 17-Motor base, 18-Coupling, 19-Vertical shaft, 20-Bearing, 21-Upright frame, 22-Fluoride feeding hose fixing ring, 23-T-shaped through groove, 24-Connecting block, 25-Threaded sleeve, 26-Protective plate, 27-Cooling water pipe, 28-Injection interface. Implementation

[0024] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of the present invention. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0026] The components of the embodiments of the invention described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0027] See Figure 1-5 This is a schematic diagram of an embodiment of a deep-hole longitudinal oscillating submerged arc welding device of the present invention. It includes a fixed frame 1, a floating frame 2, a welding torch body 3, a wire feeder 4, a hopper 5, and a longitudinal oscillation mechanism 6. The fixed frame 1 is equipped with a slide rail 7, and a slider 8 is mounted on the slide rail 7. The slider 8 is connected to the floating frame 2. The floating frame 2 is equipped with a wire feeder mounting base 9, and the wire feeder 4 is connected to the mounting base 9. One end of the floating frame 2 is connected to the welding torch body 3 via a welding torch holder 10. The wire feeder mounting base 9 and the welding torch body 3 are connected by a welding wire guide tube 11. The longitudinal swing mechanism 6 includes a speed-regulating DC motor 12, a connecting seat 13, a swing wheel 14, a connecting rod 15, and a hinge seat 16. The speed-regulating DC motor 12 is connected to the fixed frame 1 via a motor base 17. The output shaft of the speed-regulating DC motor 12 is connected to the swing wheel 14 via a coupling 18 and a vertical shaft 19. The vertical shaft 19 is connected to the connecting seat 13 via a bearing 20. One end of the connecting rod 15 is hinged to the connecting block 24 on the swing wheel 14, and the other end of the connecting rod 15 is movably connected to the hinge seat 16. The hinge seat 16 is connected to the floating frame 2.

[0028] The floating frame 2 is also equipped with a vertical frame 21, and the vertical frame 21 is equipped with a flux feeding hose fixing ring 22, which specifies the direction of the flux feeding hose and ensures the stability of flux supply.

[0029] The balance wheel 14 has a T-shaped groove 23 along its diameter on its disc surface. A connecting block 24 is provided inside the T-shaped groove 23. After adjustment according to the swing amplitude, the connecting block 24 is fixed in the corresponding position of the T-shaped groove. A scale can be set on the disc surface to make the adjustment more accurate. In this embodiment, concentric circles are engraved on the disc surface as reference positioning coordinates for setting the swing amplitude.

[0030] The connecting rod 15 is composed of two sections, front and rear. The two sections of the connecting rod 15 are connected by a screw sleeve 25, which allows the swing amplitude of the floating frame to be adjusted. The two ends of the connecting rod are connected to joint bearings, which can achieve the effect of hinge.

[0031] The wire feeder mounting base 9 is also equipped with a protective plate 26 that can separate the longitudinal swing mechanism 6 from the wire feeder 4.

[0032] The hopper 5 is located on one side of the welding torch holder 10. The top of the hopper 5 is equipped with a pipe joint for connecting the flux feeding hose. The bottom outlet of the hopper 5 is connected to a heat-resistant transparent hose to deliver the flux to the side of the welding torch for submerged arc welding (the heat-resistant transparent hose is not shown; this is a conventional design).

[0033] A cooling water pipe 27 is provided on each side of the welding torch body 3. The cooling water pipe 27 is connected to the fixed frame 1 and is connected to the cooling water injection interface 28 on the fixed frame 1. The injection interface 28 is connected to the cooling water hose from the operating arm.

[0034] In use, the variable-speed DC motor 12 starts and drives the swing wheel 14 to rotate. The connecting block 24 in the T-shaped through slot 23 drives the connecting rod 15, the hinge seat 16 and the floating frame 2 in sequence, so that the floating frame 2 makes a longitudinal linear motion. By adjusting the rotation speed of the DC motor 12, the swing frequency of the floating frame 2 can be adjusted. By adjusting the radius of the connecting block 24 from the center of the swing wheel 14, the swing amplitude of the floating frame can be adjusted. By selecting a ball bearing sliding guide pair composed of slide rail 7 and slider 8 that matches the total weight of the welding gun body, wire feeder and hopper assembly, the motion trajectory of the oscillating welding can be realized.

[0035] For deep hole welding, spiral welding is often used. The oscillation amplitude is longitudinal, and the welding is completed by stepping forward after one rotation. This process is repeated, with each rotation overlapping the previous one, until the entire hole is fully welded. The step size depends on the process requirements for the overlap width of the weld bead.

[0036] In this embodiment, the oscillating welding frequency is adjustable from 0 to 60 revolutions per minute, and the oscillation amplitude is adjustable from 10 to 80 mm. The oscillation mode is a mechanical crank-type unidirectional linear motion. The oscillating speed-regulating DC motor (DC-24V-110W-200rpm permanent magnet DC speed-regulating motor) performs unidirectional motion, avoiding the drawback of frequent reciprocating motion and burnout of the speed-regulating DC motor in ordinary oscillating speed-regulating DC motors. The welding torch is a high-power water-cooled welding torch, ensuring that the welding torch will not overheat even when the 1000A large power supply is working at full load, ensuring stable operation at high power output.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for longitudinal oscillation submerged arc welding of deep holes, characterized in that, The application relates to a welding gun, which comprises a fixed frame, a floating frame, a welding gun body, a wire feeder, a hopper and a longitudinal swing mechanism, wherein the fixed frame is provided with sliding rails, the sliding rails are provided with sliding blocks, the sliding blocks are connected with the floating frame, the floating frame is provided with a wire feeder mounting seat, the wire feeder mounting seat is connected with the wire feeder, the front end of the floating frame is connected with the welding gun body and the hopper through a welding gun frame, the wire feeder mounting seat and the welding gun body are connected through a welding wire conduit, the longitudinal swing mechanism comprises a speed-regulating DC motor, a connecting seat, a balance wheel, a connecting rod and a hinge seat, the speed-regulating DC motor is connected with the fixed frame through a motor seat, the output shaft of the speed-regulating DC motor is connected with the balance wheel through a shaft coupling and a vertical shaft, the vertical shaft is connected with the connecting seat through a bearing, one end of the connecting rod is hingedly connected with a sliding block on the balance wheel, the other end of the connecting rod is movably connected with the hinge seat, the hinge seat is connected with the floating frame, the balance wheel is provided with a T-shaped through groove on the surface of a wheel disc along the diameter direction of the balance wheel, the T-shaped through groove is provided with a connecting block, the connecting block is fixed at any position in the T-shaped through groove according to a set swing range, and the connecting rod is composed of two sections and is connected through a screw sleeve, and the length of the connecting rod can be adjusted.

2. The device according to claim 1, characterized in that, The floating frame is further provided with a vertical frame, and the vertical frame is provided with a flux feeding hose fixing ring.

3. The device according to claim 1, characterized in that, The wire feeder mounting seat is further provided with a protection plate which can separate the longitudinal swing mechanism from the wire feeder.

4. The device according to claim 1, characterized in that, The top of the hopper is provided with a pipe joint connected with a flux feeding hose, and the bottom outlet of the hopper is connected with a heat-resistant transparent hose on one side of the welding gun body.

5. The device according to claim 1, characterized in that, The welding gun body is provided with a cooling water pipe on each side, the cooling water pipe is connected with the fixed frame and is connected with an injection interface of cooling water on the fixed frame.

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