Magnetic swing narrow gap welding mechanism

Abstract

The utility model discloses a magnetic swing narrow gap welding mechanism for welding the narrow gap groove of workpiece, the magnetic swing narrow gap welding mechanism includes arc tracking slide, the support frame of connection in arc tracking slide and the servo wire feeder, guide mechanism and narrow gap welder of fixed on support frame in the tungsten electrode of narrow gap welder is equipped with the extension to the upper surface of narrow gap groove, servo wire feeder is sent to the narrow gap groove below tungsten electrode in the tungsten electrode through guide mechanism, and the tungsten electrode generates arc to make the welding wire form the welding pool in the narrow gap groove. The magnetic swing narrow gap welding mechanism includes the magnetic control device of fixed on support frame, the magnetic control device is equipped with the magnetic head of the end of downward extension and adjacent tungsten electrode, the magnetic head generates the lateral magnetic field of periodic change, to make the arc of tungsten electrode swing regularly in the lateral deflection, can realize the efficient narrow gap welding to improve the welding quality and stability.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and in particular to a magnetic pendulum narrow gap welding mechanism. Background Technology

[0002] With the increasing demand for welding thick plates (20-120mm) of high-performance materials such as titanium alloys in aerospace, deep-sea equipment, and other fields, traditional methods are insufficient to meet the requirements of high precision and low thermal damage. Magnetic control technology, by driving the arc oscillation with an external alternating magnetic field, effectively improves the problem of insufficient sidewall fusion in narrow-gap welding, while reducing heat input and deformation, and improving the mechanical properties of the joint (e.g., the efficiency of TC4 titanium alloy joints reaches 90%-95%).

[0003] Current technology employs manual welding, which achieves narrow-gap welding through mechanical oscillation. However, manual welding technology has the following drawbacks: 1. Low cladding efficiency, low welding current, slow wire feed speed, and a maximum wire diameter of only 1.2mm, leading to numerous sidewall fusion problems in narrow-gap bevels, significant workpiece deformation after multi-layer, multi-pass welding, large variations in concentricity of shaft-type workpieces, and unstable quality. 2. Long welding time, wasted gas, and poor shielding effect, making it difficult to guarantee weld quality. 3. Uneven weld formation and unattractive welds resulting from manual welding.

[0004] Therefore, it is hoped that a new magnetic pendulum narrow gap welding mechanism can be proposed to overcome the above-mentioned defects. Utility Model Content

[0005] The purpose of this invention is to provide a magnetic pendulum narrow gap welding mechanism that can realize narrow gap bevel welding of thick plates. It forms a transverse magnetic field through a magnetically controlled magnetic head to control the oscillation of the electric arc, and combined with a narrow gap welding torch, it achieves stable edge fusion in the narrow gap bevel and obtains high-quality and stable welding.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a magnetic pendulum narrow gap welding mechanism for welding a narrow gap bevel of a workpiece. The magnetic pendulum narrow gap welding mechanism includes an arc tracking carriage, a support frame connected to the arc tracking carriage, and a servo wire feeder, a wire guiding mechanism, and a narrow gap welding torch fixed on the support frame. The narrow gap welding torch has a tungsten electrode extending to the upper surface of the narrow gap bevel. The servo wire feeder, through the wire guiding mechanism, feeds a welding wire into the narrow gap bevel below the tungsten electrode, and the tungsten electrode generates an arc to form a weld pool within the narrow gap bevel. The magnetic pendulum narrow gap welding mechanism includes a magnetic control device fixed on the support frame. The magnetic control device has a magnetic control head extending downwards and adjacent to the end of the tungsten electrode. The magnetic control head generates a periodically changing transverse magnetic field to cause the arc generated by the tungsten electrode to deflect and oscillate regularly in the transverse direction.

[0007] In a preferred embodiment, the support frame moves vertically relative to the arc tracking carriage. The arc tracking carriage is equipped with an automatic arc length adjustment controller. When the narrow gap welding torch is welding, the automatic arc length adjustment controller automatically detects the arc voltage of the tungsten electrode and controls the support frame to move vertically to ensure that the arc length is constant.

[0008] In a preferred embodiment, the magnetic pendulum narrow gap welding mechanism includes a gas protection mechanism fixed to the support frame. The gas protection mechanism is provided with a lifting slide fixed to the support frame and a drag cover connected to the lifting slide. The lifting slide drives the drag cover to move vertically. The drag cover is located below the narrow gap welding torch and surrounds the outer periphery of the tungsten electrode.

[0009] In a preferred embodiment, the drag cover is provided with an air inlet cover connected to the lifting carriage and a protective cover connected to the air inlet cover, and the tungsten electrode extends into the protective cover; when the narrow gap welding torch is used for welding, the lower surface of the drag cover is in contact with the upper surface of the workpiece.

[0010] In a preferred embodiment, the wire guide mechanism is located at the longitudinal front end of the magnetron control device and has an arc-shaped guide tube extending downward from the longitudinal front end toward the longitudinal rear end. The arc-shaped guide tube has a wire start end at the top of the longitudinal front end and a wire end end at the bottom of the longitudinal rear end. The wire end is disposed adjacent to the end of the magnetron control head, and the welding wire moves from the wire start end to the wire end via the arc-shaped guide tube.

[0011] In a preferred embodiment, the servo wire feeder is located above the wire guiding mechanism and has a wire feeding channel extending vertically, with the starting end of the wire guide adjacent to the bottom end of the wire feeding channel.

[0012] In a preferred embodiment, the magnetic pendulum narrow gap welding mechanism includes a wire straightening mechanism and a wire spool fixed on the support frame. The wire spool contains the welding wire and conveys the welding wire to the wire straightening mechanism. The wire straightening mechanism straightens the welding wire in the transverse and longitudinal directions and conveys the straightened welding wire to the wire feeding channel of the servo wire feeder.

[0013] In a preferred embodiment, the wire straightening mechanism includes a first straightening mechanism and a second straightening mechanism. The first straightening mechanism straightens the wire laterally, and the second straightening mechanism is located below the first straightening mechanism and straightens the wire longitudinally.

[0014] In a preferred embodiment, the magnetic pendulum narrow gap welding mechanism includes a control system, which has excitation current and frequency parameter settings and duty cycle parameter settings for the magnetic control device, so as to control the oscillation state of the arc generated by the tungsten electrode during the narrow gap welding torch welding.

[0015] In a preferred embodiment, the magnetic pendulum narrow gap welding mechanism is provided with a side beam mechanism. The side beam mechanism is provided with a longitudinally extending longitudinal beam, a vertical beam connected to the longitudinal beam, and a horizontal beam connected to the vertical beam. The vertical beam extends vertically and moves longitudinally on the longitudinal beam, the horizontal beam extends laterally and moves vertically on the vertical beam, and the arc tracking carriage is connected to the horizontal beam and moves laterally on the horizontal beam.

[0016] Compared with existing technologies, this invention has the following advantages: The magnetic pendulum narrow gap welding mechanism includes a magnetic control device fixed on a support frame. The magnetic control device has a magnetic control head extending downwards and adjacent to the end of the tungsten electrode. The magnetic control head generates a periodically changing transverse magnetic field, causing the arc generated by the tungsten electrode to deflect and oscillate regularly in the transverse direction. The magnetic pendulum narrow gap welding mechanism can achieve efficient narrow gap welding on workpieces and provides protective gas during the welding process, thereby improving welding quality and stability. Furthermore, the magnetic pendulum narrow gap welding mechanism can weld currents of over 300A and deliver welding wires with a diameter of 2.0mm or 3.0mm in narrow gap bevels, thus solving the edge fusion problem of narrow gap bevels and improving the welding efficiency of narrow gap welding torches. Attached Figure Description

[0017] Figure 1 This is a front view of the magnetic pendulum narrow gap welding mechanism in a preferred embodiment of the present invention.

[0018] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the narrow gap welding component in the magnetic pendulum narrow gap welding mechanism shown.

[0019] Figure 3 yes Figure 2 The front view of the narrow gap welding assembly shown.

[0020] Figure 4 yes Figure 2 The front view of the narrow-gap welding assembly shown.

[0021] Figure 5 yes Figure 2 A top view of the narrow-gap welding assembly shown. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0023] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] 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 number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a number" means two or more, unless otherwise explicitly specified.

[0025] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0026] Please see Figures 1 to 5 As shown, a preferred embodiment of this utility model discloses a magnetic pendulum narrow-gap welding mechanism 100 for application in the aerospace, deep-sea equipment, and cylinder industries. The magnetic pendulum narrow-gap welding mechanism 100 is used to weld a narrow-gap bevel of a workpiece and includes a side beam mechanism 200 and a narrow-gap welding assembly connected to the side beam mechanism 200. The workpiece is placed on a processing platform, the narrow-gap welding assembly is used to weld the workpiece, and the side beam mechanism 200 drives the narrow-gap welding assembly to move, thereby adjusting the relative position of the narrow-gap welding assembly with the workpiece in the longitudinal, transverse, and vertical directions.

[0027] Combination Figure 1As shown, the side beam mechanism 200 includes a longitudinal beam 210 extending longitudinally, a vertical beam 220 connected to the longitudinal beam 210, and a horizontal beam 230 connected to the vertical beam 220. The vertical beam 220 extends vertically and moves longitudinally on the longitudinal beam 210, and the horizontal beam 230 extends laterally and moves vertically on the vertical beam 220. The narrow-gap welding assembly is connected to the horizontal beam 230 and moves laterally on the horizontal beam 230. The side beam mechanism 200 also includes several supports 240 extending vertically downward from the bottom of the longitudinal beam 210, and the side beam mechanism 200 is supported on the ground as a whole by the several supports 240.

[0028] Please see Figures 2 to 5 As shown, the narrow gap welding assembly includes an arc tracking carriage 10, a support frame 20 connected to the arc tracking carriage 10, and a narrow gap welding torch 30, a welding wire spool, a welding wire straightening mechanism 40, a servo wire feeder 50, a wire guiding mechanism 60, a magnetic control device 70, and a gas protection mechanism 80 fixed to the support frame 20. The arc tracking carriage 10 is connected to the crossbeam 230 of the side beam mechanism 200, and the arc tracking carriage 10 can be manually adjusted to move laterally along the crossbeam 230.

[0029] The support frame 20 includes a longitudinal plate 21 extending longitudinally, a front transverse plate 22 extending laterally from the longitudinal front end of the longitudinal plate 21, and a rear transverse plate 23 extending laterally from the longitudinal rear end of the longitudinal plate 21. The front transverse plate 22 and the rear transverse plate 23 are located on the same transverse side of the longitudinal plate 21, and the support frame 20 is connected to the arc tracking carriage 10 through the rear transverse plate 23.

[0030] The narrow gap welding torch 30 is fixed on the rear horizontal plate 23 of the support frame 20 and located between the front horizontal plate 22 and the rear horizontal plate 23. The narrow gap welding torch 30 is provided with a torch head assembly 31 fixed on the rear horizontal plate 23 and a tungsten electrode 32 extending downward from the torch head assembly 31 to the upper surface of the narrow gap bevel. The tungsten electrode 32 generates an electric arc to form a weld pool in the narrow gap bevel with the welding wire.

[0031] The welding wire spool is fixed to the upper part of the longitudinal plate 21 and located above the welding wire straightening mechanism 40. The welding wire spool contains the welding wire and conveys the welding wire to the welding wire straightening mechanism 40. The welding wire straightening mechanism 40 can straighten the welding wire in both the transverse and longitudinal directions and convey the straightened welding wire to the wire feeding channel 51 of the servo wire feeder 50. Specifically, the welding wire straightening mechanism 40 is fixed on the front horizontal plate 22 and is provided with a first straightening mechanism 41 and a second straightening mechanism 42 located below the first straightening mechanism 41. The first straightening mechanism 41 straightens the welding wire in the transverse direction, and the second straightening mechanism 42 straightens the welding wire in the longitudinal direction.

[0032] The servo wire feeder 50 is fixed on the longitudinal plate 21 and located above the wire guiding mechanism 60. The servo wire feeder 50 has a wire feeding channel 51 extending vertically, and the wire feeding channel 51 is fixed to the front horizontal plate 22. Meanwhile, the wire guiding mechanism 60 can be selectively fixed to the front horizontal plate 22 or the longitudinal plate 21 as needed. The magnetic control assembly 70 is fixed on the longitudinal plate 21 and is located longitudinally between the wire guiding mechanism 60 and the narrow gap welding torch 30. The magnetic control device 70 is an excitation generator and has a magnetic control head 71 extending downward and adjacent to the end of the tungsten electrode 32. The magnetic control head 71 generates a periodically changing transverse magnetic field, so that the arc generated by the tungsten electrode 32 deflects and oscillates regularly in the transverse direction.

[0033] Specifically, the wire guide mechanism 60 is located at the longitudinal front end of the magnetic control device 70 and is provided with a wire guide plate 61 and an arc-shaped guide tube 62 extending downward from the longitudinal front end of the wire guide plate 61 toward the longitudinal rear end of the wire guide plate 61. The arc-shaped guide tube 62 has a wire guide start end 621 located at the top of the longitudinal front end and a wire guide end end 622 located at the bottom of the longitudinal rear end. The wire guide start end 621 is adjacent to the bottom end of the wire feeding channel 51, and the wire guide end 622 is located near the end of the magnetic control head 71, so that the welding wire moves from the wire guide start end 621 to the wire guide end 622 via the arc-shaped guide tube 61. In summary, the servo wire feeder 50 delivers the welding wire to the narrow gap groove below the tungsten electrode 32 of the narrow gap welding torch 30 through the wire guide mechanism 60, and the electric arc generated by the tungsten electrode 32, under the influence of the transverse magnetic field of the magnetic control head 71, causes the welding wire to form a weld pool in the narrow gap groove.

[0034] Furthermore, the magnetic pendulum narrow-gap welding mechanism 100 also includes a control system. This control system has settings for the excitation current and frequency parameters, as well as the duty cycle parameter, of the magnetic control device 70 to control the oscillation state of the arc generated by the tungsten electrode 32 during welding with the narrow-gap welding torch 30. Simultaneously, the support frame 20 moves vertically relative to the arc-tracking slide 10, which is equipped with an automatic arc length adjustment controller. During welding with the narrow-gap welding torch 30, the automatic arc length adjustment controller automatically detects the arc voltage of the tungsten electrode 32 and controls the support frame 20 to move vertically, ensuring a constant arc length. Furthermore, the automatic arc length adjustment controller can achieve high-quality welding on uneven surfaces and surfaces with radial runout, adapting to different welding heights. The automatic arc length controller plays a crucial role in stabilizing the arc and ensuring the weld quality during automatic welding.

[0035] The gas protection mechanism 80 is fixed on the rear horizontal plate 23 on the side away from the narrow gap welding torch 30. The gas protection mechanism 80 has a lifting slide 81 fixed on the rear horizontal plate 23 of the support frame 20 and a drag cover 82 connected to the lifting slide 81. The lifting slide 81 drives the drag cover 82 to move vertically. The drag cover 82 is located below the narrow gap welding torch 30 and surrounds the outer periphery of the tungsten electrode 32. Specifically, the drag cover 82 has an air inlet hood 821 connected to the lifting slide 81, a protective hood 822 communicating with the air inlet hood 821, and an air inlet nozzle 823 located at the top of the air inlet hood 821. The air inlet nozzle 823 allows the protective gas to flow into the drag cover 82. The tungsten electrode 32 extends into the protective hood 822. When the narrow gap welding torch 30 is welding, the lower surface of the drag cover 81 is always in contact with the upper surface of the workpiece to ensure sufficient protection by the protective gas, thereby obtaining a high-quality weld. Furthermore, the cooperation between the lifting carriage 81 and the arc tracking carriage 10 enables multi-layer, multi-pass welding applications.

[0036] In this invention, the magnetic pendulum narrow-gap welding mechanism 100 includes a magnetic control device 70 fixed on a support frame 20. The magnetic control device 70 has a magnetic control head 71 extending downwards and adjacent to the end of the tungsten electrode 32. The magnetic control head 71 generates a periodically changing transverse magnetic field, causing the arc generated by the tungsten electrode 32 to deflect and oscillate regularly in the transverse direction. The magnetic pendulum narrow-gap welding mechanism 100 can achieve efficient narrow-gap welding on workpieces and provides shielding gas during the welding process, thereby improving welding quality and stability. Furthermore, the magnetic pendulum narrow-gap welding mechanism 100 can weld currents of 300A or more and deliver welding wires with a diameter of 2.0mm or 3.0mm in narrow-gap grooves, thereby solving the edge fusion problem of narrow-gap grooves and improving the welding efficiency of the narrow-gap welding torch 30.

[0037] In summary, the above are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Any simple equivalent changes and modifications made in accordance with the claims and description of the present utility model should still fall within the scope of the present utility model patent.

Claims

1. A magnetic pendulum narrow gap welding mechanism for welding a narrow gap bevel of a workpiece, the magnetic pendulum narrow gap welding mechanism comprising an arc tracking carriage, a support frame connected to the arc tracking carriage, and a servo wire feeder, a wire guiding mechanism, and a narrow gap welding torch fixed on the support frame; the narrow gap welding torch is provided with a tungsten electrode extending to the upper surface of the narrow gap bevel, the servo wire feeder feeds a welding wire into the narrow gap bevel below the tungsten electrode through the wire guiding mechanism, and the tungsten electrode generates an arc to form a weld pool of welding wire within the narrow gap bevel; characterized in that: The magnetic pendulum narrow gap welding mechanism includes a magnetic control device fixed on the support frame. The magnetic control device is provided with a magnetic control head that extends downward and is adjacent to the end of the tungsten electrode. The magnetic control head generates a periodically changing transverse magnetic field so that the electric arc generated by the tungsten electrode deflects and oscillates regularly in the transverse direction.

2. The magnetic pendulum narrow gap welding mechanism as described in claim 1, characterized in that: The support frame moves vertically relative to the arc tracking slide. The arc tracking slide is equipped with an automatic arc length adjustment controller. When the narrow gap welding torch is welding, the automatic arc length adjustment controller automatically detects the arc voltage of the tungsten electrode and controls the support frame to move vertically to ensure that the arc length is constant.

3. The magnetic pendulum narrow gap welding mechanism as described in claim 1, characterized in that: The magnetic pendulum narrow gap welding mechanism includes a gas protection mechanism fixed on the support frame. The gas protection mechanism is provided with a lifting slide fixed on the support frame and a drag cover connected to the lifting slide. The lifting slide drives the drag cover to move vertically. The drag cover is located below the narrow gap welding torch and surrounds the outer periphery of the tungsten electrode.

4. The magnetic pendulum narrow gap welding mechanism as described in claim 3, characterized in that: The drag cover is provided with an air inlet cover connected to the lifting carriage and a protective cover connected to the air inlet cover, and the tungsten electrode extends into the protective cover; when the narrow gap welding gun is welding, the lower surface of the drag cover is in contact with the upper surface of the workpiece.

5. The magnetic pendulum narrow gap welding mechanism as described in claim 1, characterized in that: The wire guide mechanism is located at the longitudinal front end of the magnetic control device and has an arc-shaped guide tube that extends downward from the longitudinal front end toward the longitudinal rear end. The arc-shaped guide tube has a wire start end at the top of the longitudinal front end and a wire end end at the bottom of the longitudinal rear end. The wire end is located near the end of the magnetic control head, and the welding wire moves from the wire start end to the wire end through the arc-shaped guide tube.

6. The magnetic pendulum narrow gap welding mechanism as described in claim 5, characterized in that: The servo wire feeder is located above the wire guide mechanism and has a wire feeding channel extending vertically, with the starting end of the wire guide adjacent to the bottom end of the wire feeding channel.

7. The magnetic pendulum narrow gap welding mechanism as described in claim 6, characterized in that: The magnetic pendulum narrow gap welding mechanism includes a wire straightening mechanism and a wire spool fixed on the support frame. The wire spool contains the welding wire and conveys the welding wire to the wire straightening mechanism. The wire straightening mechanism straightens the welding wire in the horizontal and vertical directions and conveys the straightened welding wire to the wire feeding channel of the servo wire feeder.

8. The magnetic pendulum narrow gap welding mechanism as described in claim 7, characterized in that: The wire straightening mechanism includes a first straightening mechanism and a second straightening mechanism. The first straightening mechanism straightens the wire in the horizontal direction, and the second straightening mechanism is located below the first straightening mechanism and straightens the wire in the vertical direction.

9. The magnetic pendulum narrow gap welding mechanism as described in claim 1, characterized in that: The magnetic oscillation narrow gap welding mechanism includes a control system, which has settings for the excitation current and frequency parameters and the duty cycle parameter of the magnetic control device, so as to control the oscillation state of the arc generated by the tungsten electrode during the narrow gap welding torch welding.

10. The magnetic pendulum narrow gap welding mechanism as described in claim 1, characterized in that: The magnetic pendulum narrow gap welding mechanism is provided with a side beam mechanism. The side beam mechanism is provided with a longitudinal beam extending in the longitudinal direction, a vertical beam connected to the longitudinal beam, and a horizontal beam connected to the vertical beam. The vertical beam extends in the vertical direction and moves longitudinally on the longitudinal beam. The horizontal beam extends in the transverse direction and moves vertically on the vertical beam. The arc tracking carriage is connected to the horizontal beam and moves in the transverse direction on the horizontal beam.

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