Welding unit of non-consumable electrode gas shielded welding type internal welding machine

Abstract

The invention belongs to the technical field of pipeline installation and construction, particularly relates to a welding unit of a non-consumable electrode gas shielded welding type internal welding machine, and aims to solve the problem of welding spatter during welding. The non-consumable electrode gun head comprises a frame and a non-consumable electrode gun head assembly installed on the frame. The non-consumable electrode gun head assembly comprises a gun seat body mounted on the frame, a tungsten electrode mounted on the gun seat body, a ceramic gas guide cover mounted on the gun seat body and used for covering the tungsten electrode, and a welding wire mounted on the gun seat body and spaced from the tungsten electrode; the tip of the tungsten electrode penetrates out of the ceramic gas guide cover, and the end of the welding wire is inserted into a molten pool in a welding seam. According to the invention, the non-gas metal arc welding unit is adopted to replace the existing gas metal arc welding unit, so that the welding of the inner circumferential weld of the pipeline without splashing is realized.

Description

Technical Field

[0001] This invention belongs to the technical field of pipeline installation and construction, and specifically relates to a non-consumable electrode gas shielded welding type internal welding machine welding unit, which is mainly used for welding the inner circumferential weld of steel pipe in the pipe end welding process during pipeline construction. Background Technology

[0002] The welding units of the internal welding machines used in pipeline construction are generally gas metal arc welding units. In the welding process of this unit, the welding wire serves as both the welding electrode and the filler metal, resulting in a lot of welding spatter.

[0003] Due to the aforementioned process characteristics of gas metal arc welding, the formed weld and its surrounding area have a lot of welding spatter. This spatter adheres to the inner wall of the pipe and the weld, making it difficult to remove completely and seriously affecting the quality of internal anti-corrosion construction at the pipe weld joint.

[0004] Welding spatter adhering to the weld bead can easily produce false defect images on the radiographic film during the radiographic inspection of the circumferential weld of the pipeline. The evaluation of the image film can easily lead to misjudgment or omission, which is detrimental to the safe operation of the pipeline. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, namely the issue of welding spatter during welding, the present invention provides a welding unit for a non-consumable electrode gas shielded welding internal welding machine.

[0006] This application discloses a welding unit for a non-consumable electrode gas shielded welding type internal welding machine, which adopts the following technical solution:

[0007] A welding unit for a non-consumable electrode gas shielded welding machine includes a frame and a non-consumable electrode gun head assembly mounted on the frame;

[0008] The non-consumable electrode gun head assembly includes a gun base body mounted on a frame, a tungsten electrode mounted on the gun base body, a ceramic gas guide cover mounted on the gun base body to cover the tungsten electrode, and welding wires mounted on the gun base body and spaced apart from the tungsten electrode.

[0009] The tip of the tungsten electrode protrudes through the ceramic gas guide shroud, and the end of the welding wire is inserted into the molten pool in the weld.

[0010] By adopting the above technical solution, during the welding process, the welding wire is placed in the molten pool, and the welding arc generated by the tungsten electrode melts the welding wire in the molten pool and fills the molten pool to weld the weld. In this way, the welding wire melts directly in the molten pool and fills the molten pool directly, thereby effectively avoiding welding spatter that occurs during welding.

[0011] Preferably, a gun head attitude control component is mounted on the frame;

[0012] The gun head attitude control assembly includes a rotating bracket connected to the gun base body and an adjusting cylinder connected to the frame.

[0013] The rotary support is hinged to the frame, the bottom of the adjusting cylinder is hinged to the frame, and the piston rod of the adjusting cylinder is hinged to the rotary support to which it belongs; the piston rod of the adjusting cylinder drives the tungsten electrode on the gun base body to extend or retract into the frame by telescoping.

[0014] By adopting the above technical solution, when the inner welding machine body outputs welding shielding gas, the welding shielding gas is sequentially delivered to the adjustment cylinder of the gun head posture control component through the gas cable system. The adjustment cylinder drives the rotary support to rotate, and the rotation of the rotary support drives the gun base body to rotate, realizing the retraction and ejection of the gun base body on the frame. This allows the tungsten electrode to retract when the inner welding machine moves, and the tungsten electrode to be adjusted to the bevel position during welding.

[0015] Preferably, the gun holder body is provided with a welding wire end attitude retention component;

[0016] The wire end attitude holding assembly includes a rigid wire feeding tube fixedly connected to the gun body, and the welding wire passes through the rigid wire feeding tube.

[0017] By adopting the above technical solution, the rigid wire feeding tube fixes the welding wire and prevents the welding wire from shaking.

[0018] Preferably, the frame is provided with a wire feeding assembly;

[0019] The wire feeding assembly includes a wire spool rotatably connected to a frame and a wire feeding motor that drives the wire spool to rotate; the wire is wound on the wire spool.

[0020] By adopting the above technical solution, when the inner welding machine body outputs wire feeding current, the wire feeding current is sequentially transmitted to the wire feeding assembly through the gas cable system. The wire feeding motor of the wire feeding assembly rotates, and the welding wire wound on the welding wire spool is transported to the welding pool area through the rigid wire feeding tube of the welding wire end posture holding assembly.

[0021] Preferably, a wire feeding reducer connected to the wire feeding motor is mounted on the frame, and a wire feeding wheel is fitted onto the output end of the wire feeding reducer, on which the welding wire is wound.

[0022] The frame is equipped with a wire feeding shell, which covers the wire feeding wheel, and the wire feeding shell has a through hole for the welding wire to enter and exit the wire feeding shell.

[0023] Preferably, the gun holder body is fixedly connected to an elastic wire feeding tube that communicates with a rigid wire feeding tube.

[0024] Preferably, the frame includes a cylinder-side outer arc plate, a welding wire-side outer arc plate, a middle arc plate, a front-end upright plate, and a rear-end upright plate; the cylinder-side outer arc plate, the welding wire-side outer arc plate, and the middle arc plate are arranged in parallel; the rear-end upright plate and the front-end upright plate are fixedly connected to the edges of the cylinder-side outer arc plate, the welding wire-side outer arc plate, and the middle arc plate, connecting the cylinder-side outer arc plate, the welding wire-side outer arc plate, and the middle arc plate together;

[0025] The middle arc-shaped plate is provided with a receiving groove, and a sliding bracket is slidably connected in the receiving groove. The sliding bracket is slidably connected to the receiving groove.

[0026] The output shaft of the wire feeding reducer passes through the sliding bracket, and the wire feeding reducer, the wire feeding housing and the sliding bracket are fixedly connected. The wire feeding reducer and the wire feeding housing are mounted on the middle arc plate through the sliding bracket. The wire feeding reducer and the wire feeding housing are arranged on both sides of the sliding bracket.

[0027] A vibration assembly is installed on the intermediate arc plate; the vibration assembly includes a vibrator housing fixedly connected to the intermediate arc plate; a push rod is inserted through the vibrator housing and moves reciprocally within the vibrator housing, one end of the push rod is fixedly connected to the housing of the wire feeding reducer, and the other end of the push rod is driven by a vibration motor to move reciprocally within the vibrator housing.

[0028] By adopting the above technical solution, when the inner welding machine body outputs a vibration control signal, the vibration control signal is sequentially transmitted to the vibration component through the air cable system. The vibration motor of the vibration component drives the cam to rotate, which in turn drives the push rod to move. The push rod reciprocates, which in turn drives the sliding bracket and the wire feeding motor, wire feeding reducer, wire feeding wheel, and wire feeding housing connected to it to reciprocate along the receiving groove on the middle arc plate, thereby driving the welding wire to reciprocate and realizing vibration wire feeding.

[0029] Preferably, the vibrator housing has a receiving cavity and an arrangement cavity, one end of the push rod passes through the arrangement cavity and exits from the vibrator housing, and both ends of the push rod exit the receiving cavity;

[0030] A spring is arranged in the receiving cavity, and the spring is sleeved on the push rod;

[0031] A pressure block is fixedly connected to the push rod, and the pressure block contacts the end of the spring. The push rod is arranged between the arrangement cavity and the spring. A cam driven by a vibration motor is installed in the arrangement cavity, and the cam contacts the end of the push rod.

[0032] Preferably, an auxiliary rod is fixedly connected between the outer arc plate on the cylinder side and the outer arc plate on the welding wire side.

[0033] Preferably, a gun head insulating plate is placed between the gun base body and the rotating bracket.

[0034] The beneficial effects of this invention are:

[0035] The key feature of this invention is the use of a non-consumable electrode gas shielded welding (GEW) unit to replace the existing consumable electrode gas shielded welding (GAW) unit, achieving spatter-free welding of inner circumferential welds in pipelines. The GEW unit uses a tungsten electrode to generate an arc, with the welding wire serving only as filler metal, fed into the weld pool at a specific pulse frequency. This achieves stable arc, stable wire feeding, and no welding spatter. Due to the spatter-free process characteristics of GEW, it improves the quality of internal corrosion protection at pipeline weld joints and enhances the accuracy of radiographic testing. The GEW process uses argon as the shielding gas, allowing this type of welding unit to be used for welding pipelines made of carbon steel, stainless steel, and special alloy steel, further expanding the application range of pipeline welding machines.

[0036] (1) No welding spatter is generated during the welding process of the welding machine inside the device.

[0037] (2) This device enables high-speed non-consumable electrode gas shielded welding of the internal welding machine.

[0038] (3) This device enables the internal welding machine to be used for welding pipes made of carbon steel, stainless steel and special alloy steel. Attached Figure Description

[0039] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0040] Figure 1 This is a schematic diagram of the welding unit of the non-consumable electrode gas shielded welding internal welding machine in this embodiment;

[0041] Figure 2 This is a schematic diagram of the framework in this embodiment;

[0042] Figure 3 This is a schematic diagram showing the connection of the non-consumable electrode gun head assembly, the welding wire end posture holding assembly, and the gun head posture control assembly in this embodiment.

[0043] Figure 4 This is an exploded view of the connection between the non-consumable electrode gun head assembly, the welding wire end attitude holding assembly, and the gun head attitude control assembly in this embodiment.

[0044] Figure 5 This is a schematic diagram of the non-fusible electrode nozzle assembly in this embodiment;

[0045] Figure 6 This is a schematic diagram of the wire feeding assembly in this embodiment;

[0046] Figure 7This is a schematic diagram showing the arrangement of the wire feeding wheels in the wire feeding housing in this embodiment;

[0047] Figure 8 This is a schematic diagram showing the connection between the vibration assembly and the wire feeding assembly in this embodiment;

[0048] Figure 9 This is a schematic diagram of the connection between the vibration component and the wire feeding component in this embodiment.

[0049] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Cylinder-side outer arc plate; 12. Welding wire-side outer arc plate; 13. Middle arc plate; 131. Receiving groove; 132. Sliding bracket; 14. Front end plate; 15. Rear end plate; 16. Auxiliary rod; 2. Non-consumable electrode gun head assembly; 21. Gun holder body; 22. Locking cap; 23. Tungsten electrode; 24. Ceramic gas guide cover; 25. Gas cable connecting screw; 3. Welding wire end posture holding assembly; 31. Rigid wire feed tube; 32. Locking screw 4. Wire; 41. Gun head posture control assembly; 42. Positioning block; 43. Positioning seat; 44. Rotary bracket; 55. Adjusting cylinder; 6. Wire feeding assembly; 51. Welding wire spool; 52. Wire feeding motor; 53. Wire feeding reducer; 54. Wire feeding wheel; 55. Wire feeding housing; 56. Elastic wire feeding tube; 7. Vibration assembly; 61. Vibrator housing; 611. Receiving cavity; 612. Arrangement cavity; 62. Tappet; 621. Pressure block; 63. Spring; 64. Cam; 65. Vibration motor. Detailed Implementation

[0050] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0052] This invention provides a welding unit for a non-consumable electrode gas shielded welding type internal welding machine, referring to... Figure 1 The welding unit of the non-consumable electrode gas shielded welding machine includes a frame 1, a non-consumable electrode gun head assembly 2 mounted on the frame 1, a wire end posture holding assembly 3, a gun head posture control assembly 4, a wire feeding assembly 5, and a vibration assembly 6 for realizing vibration wire feeding.

[0053] Reference Figure 2The frame 1 is fixed to the mounting base of the pipe welding machine via a bracket. The pipe welding machine provides the non-consumable electrode gas shielded welding unit with welding shielding gas, welding current, and control power. The frame 1 includes a cylinder-side outer arc plate 11, a wire-side outer arc plate 12, a middle arc plate 13, a front upright plate 14, and a rear upright plate 15. The cylinder-side outer arc plate 11, the wire-side outer arc plate 12, and the middle arc plate 13 are arranged in parallel, and there are gaps between them. The length of the middle arc plate 13 is less than that of the cylinder-side outer arc plate 11 and the wire-side outer arc plate 12. The rear upright plate 15 is fixedly connected to the edges of the cylinder-side outer arc plate 11, the welding wire-side outer arc plate 12, and the middle arc plate 13, connecting them together. The front upright plate 14 is fixed to the edge of the middle arc plate 13 and to the surface of the cylinder-side outer arc plate 11 and the welding wire-side outer arc plate 12. It cooperates with the rear upright plate 15 to stably connect the cylinder-side outer arc plate 11, the welding wire-side outer arc plate 12, and the middle arc plate 13 together. An auxiliary rod 16 is fixedly connected between the cylinder-side outer arc plate 11 and the welding wire-side outer arc plate 12, reinforcing the connection between them. The edges of the cylinder-side outer arc plate 11 and the welding wire-side outer arc plate 12 are arc-shaped, as is the edge of the middle arc plate 13. The connections between the cylinder-side outer arc plate 11, the welding wire-side outer arc plate 12, the middle arc plate 13, the front end upright plate 14, and the rear end upright plate 15 are all fixed with screws.

[0054] Reference Figure 3 , Figure 4 , Figure 5 The non-consumable electrode gun head assembly 2 includes a gun holder body 21, a locking cap 22, a tungsten electrode 23, a ceramic gas guide shroud 24, and a gas cable connecting screw 25. The gun holder body 21 is connected to the frame 1. The tungsten electrode 23 is mounted on the gun holder body 21 and fixedly connected to the gun holder body 21 by the locking cap 22. The ceramic gas guide shroud 24 is fitted onto the locking cap 22 and threadedly connected to it, thus fixing the ceramic gas guide shroud 24 to the gun holder body 21. When the ceramic gas guide shroud 24 is mounted on the gun holder body 21, the tip of the tungsten electrode 23 protrudes beyond the outer side of the ceramic gas guide shroud 24. The gas cable connecting screw 25 is fixedly connected to the side of the gun holder body 21 away from the tungsten electrode 23 for connection to the gas cable system. The gas cable system on the internal welding machine transmits welding shielding gas to the ceramic gas guide shroud 24 and provides welding current to the tungsten electrode 23.

[0055] The wire end posture holding assembly 3 includes a rigid wire feed tube 31 that passes through the gun holder body 21 and a locking screw 32 that fixes the rigid wire feed tube 31 to the gun holder body 21. The welding wire passes through the rigid wire feed tube 31, which fixes the position of the welding wire and separates the welding wire from the tungsten electrode 23, so that there is a gap between the welding wire and the tungsten electrode 23.

[0056] The gun head attitude control assembly 4 includes a positioning block 41, a positioning seat 42, a rotating bracket 43, and an adjusting cylinder 44. The positioning block 41 is fixedly connected to the outer arc plate 12 on the welding wire side, and the positioning seat 42 is fixedly connected to the outer arc plate 11 on the cylinder side. The positioning block 41 and the positioning seat 42 are arranged between the outer arc plate 11 on the cylinder side and the outer arc plate 12 on the welding wire side. The two sides of the rotating bracket 43 are respectively rotatably connected to the positioning block 41 and the positioning seat 42 by screws. The rotating bracket 43 is arranged on the upper side of the gun holder body 21, and the rotating bracket 43 is fixedly connected to the gun holder body 21 by bolts. A through hole is provided on the rotating bracket 43 to expose the ceramic gas guide cover 24. The adjusting cylinder 44 is installed between the intermediate arc-shaped plate and the outer arc-shaped plate 11 on the cylinder side. The piston rod of the adjusting cylinder 44 is connected to the rotary bracket 43 by screws, realizing the hinge between the adjusting cylinder 44 and the rotary bracket 43. The bottom of the adjusting cylinder 44 is rotatably connected to the intermediate arc-shaped plate and the outer arc-shaped plate 11 on the cylinder side by screws. Among them, a gun head insulating plate is placed between the gun base body 21 and the rotary bracket 43.

[0057] Reference Figure 6 , Figure 7 The wire feeding assembly 5 includes a wire spool 51 rotatably connected between the intermediate arc plate and the outer arc plate 12 on the wire side. The wire spool 51 is wound with welding wire and rotates toward the tungsten electrode 23. The welding wire is released by rotation and transported to the tungsten electrode 23 by the wire feeding assembly 5. The position of the welding wire is fixed by the wire end posture holding assembly 3 to facilitate welding.

[0058] A wire feeding motor 52 is mounted on the intermediate arc-shaped plate. The output shaft of the wire feeding motor 52 is connected to the input end of a wire feeding reducer 53 mounted on the intermediate arc-shaped plate. A wire feeding wheel 54 is fitted onto the output end of the wire feeding reducer 53. After the wire feeding motor 52 starts, it drives the wire feeding reducer 53 to start, thereby driving the wire feeding wheel 54 to rotate. A wire feeding housing 55 is mounted on the intermediate arc-shaped plate, covering the wire feeding wheel 54. The wire feeding housing 55 has through holes for the welding wire to enter and exit the housing. The welding wire is wound on the wire feeding wheel 54, and the rotation of the wire feeding wheel 54 rotates the welding wire wound on the wire feeding reel out. (Refer to...) Figure 5An elastic wire feeding tube 56, which communicates with a rigid wire feeding tube 31, is fixedly connected to the gun holder body 21. The welding wire that is turned out from the wire feeding disc by the wire feeding wheel 54 passes through the elastic wire feeding tube 56 and is transported to the rigid wire feeding tube 31 through the elastic wire feeding tube 56.

[0059] A receiving groove 131 is provided in the intermediate arc-shaped plate, and a sliding bracket 132 is slidably connected in the receiving groove 131. The sliding bracket 132 slides in the receiving groove 131 towards the tungsten electrode 23. The output shaft of the wire feeding reducer 53 passes through the sliding bracket 132, and the wire feeding reducer 53, the wire feeding housing 55, and the sliding bracket 132 are fixedly connected and mounted on the intermediate arc-shaped plate via the sliding bracket 132. The wire feeding reducer 53 and the wire feeding housing 55 are arranged on both sides of the sliding bracket 132. The wire feeding motor 52 is fixedly connected to the wire feeding reducer 53 and is connected to the intermediate arc-shaped plate via the sliding bracket 132.

[0060] Reference Figure 8 , Figure 9 The vibration assembly 6 includes a vibrator housing 61 fixedly connected to a central arc-shaped plate. A push rod 62 passes through the vibrator housing 61. The vibrator housing 61 has a receiving cavity 611 and an arrangement cavity 612. One end of the push rod 62 passes through the arrangement cavity 612 and exits from the vibrator housing 61, being fixedly connected to the housing of the wire feeding reducer 53. Both ends of the push rod 62 exit the receiving cavity 611. A spring 63 is arranged in the receiving cavity 611 and is sleeved on the push rod 62. A pressure block 621 is fixedly connected to the push rod 62, contacting the end of the spring 63. The push rod 621 is arranged between the arrangement cavity 612 and the spring 63.

[0061] A cam 64, driven to rotate by a vibration motor 65, is installed in the arrangement cavity 612. The cam 64 contacts the end of the push rod 62. The vibration motor 65 is fixedly connected to the vibrator housing 61.

[0062] When the vibratory motor 65 starts, it drives the cam 64 to rotate. The rotation of the cam 64 pushes the push rod 62, pushing it outwards towards the vibrator housing 61. As the push rod 62 moves, the pressure block 621 on it compresses the spring 63. With the return action of the spring 63 and the cam 64 rotating to the small diameter region, the push rod 62 retracts, allowing it to reciprocate on the vibrator housing 61 under the action of the spring 63, the vibratory motor 65, and the cam 64. The direction of the reciprocating movement of the push rod 62 is the same as the direction of the receiving groove 131 on the intermediate arc-shaped plate where the sliding bracket 132 slides, ensuring that the reciprocating movement of the push rod 62 provides continuous reciprocating thrust to the wire feeding reducer 53.

[0063] A method for using a non-consumable electrode gas shielded welding machine welding unit disclosed in this application embodiment is as follows:

[0064] The non-consumable electrode gas shielded welding unit is fixed on the mounting base of the welding machine inside the pipeline by a bracket. The welding machine inside the pipeline provides the non-consumable electrode gas shielded welding unit with welding shielding gas, welding current and control power.

[0065] When the internal welding machine body outputs welding shielding gas, the welding shielding gas is sequentially delivered to the non-consumable electrode gun head assembly 2 through the gas cable system. The welding shielding gas sequentially passes through the gas cable connecting screw 25, the gun body 21, and the ceramic gas guide cover 24 of the non-consumable electrode gun head assembly 2 to reach the welding area, forming a gas protective atmosphere for the tungsten electrode 23 and the weld pool.

[0066] When the inner welding machine body outputs welding shielding gas, the welding shielding gas is sequentially delivered to the adjustment cylinder 44 of the gun head posture control component 4 through the gas cable system. The adjustment cylinder 44 drives the rotary bracket 43 located on the positioning block 41 and the positioning seat 42 to rotate. The rotation of the rotary bracket 43 drives the gun holder body 21 to rotate, realizing the retraction and ejection of the gun holder body 21 on the frame 1. This allows the tungsten electrode 23 to retract when the inner welding machine moves, and to be adjusted to the bevel position during welding.

[0067] When the internal welding machine outputs welding current, the welding current is sequentially transmitted through the gas cable system to the non-consumable electrode gun head assembly 2, and then sequentially through the gas cable connecting screw 25, gun holder body 21, locking cap 22, and tungsten electrode 23 to finally generate a welding arc. During the welding process, the welding wire is placed in the molten pool. The welding arc generated by the energized tungsten electrode 23 melts the welding wire in the molten pool, filling it and welding the weld. The welding wire melts directly in the molten pool and fills it directly, effectively avoiding welding spatter. The key feature of this invention is the use of a non-consumable electrode gas shielded welding unit to replace the existing consumable electrode gas shielded welding unit, achieving spatter-free welding of inner circumferential welds in pipelines. The non-consumable electrode gas shielded welding unit uses the tungsten electrode 23 as the electrode to generate the arc, and the welding wire is only used as filler metal, fed into the molten pool according to a specific pulse frequency. This achieves stable arc, stable wire feeding, and no welding spatter. Due to the spatter-free process characteristics of non-consumable electrode gas shielded welding, it is beneficial to improve the quality of internal corrosion protection at pipeline weld joints. It also improves the accuracy of radiographic testing. The non-consumable electrode gas shielded welding process uses argon as the welding shielding gas, allowing this type of welding unit to be used for welding pipelines made of carbon steel, stainless steel, and special alloy steel, further expanding the application range of pipeline welding machines.

[0068] When the internal welding machine body outputs wire feeding current, the wire feeding current is sequentially transmitted to the wire feeding assembly 5 through the gas cable system. The wire feeding motor 52 of the wire feeding assembly 5 rotates, driving the wire feeding reducer 53 and the wire feeding wheel 54 to rotate, and conveying the welding wire wound on the welding wire spool 51 to the elastic wire feeding tube 56, and then conveying it to the welding pool area through the rigid wire feeding tube 31 of the welding wire end posture holding assembly 3.

[0069] When the inner welding machine body outputs a vibration control signal, the vibration control signal is transmitted to the vibration component 6 through the air cable system. The vibration motor 65 of the vibration component 6 drives the cam 64 to rotate, which in turn drives the push rod 62 to move. Under the combined action of the spring 63 and the pressure block 621, the push rod 62 reciprocates, which drives the sliding bracket 132 and the wire feeding motor 52, wire feeding reducer 53, wire feeding wheel 54 and wire feeding housing 55 connected to it to reciprocate along the receiving groove 131 on the middle arc plate 13, thereby driving the welding wire to reciprocate and realize vibration wire feeding.

[0070] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0071] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A welding unit for a non-consumable electrode gas shielded welding type internal welding machine, characterized in that: Includes a frame (1) and a non-fusible electrode nozzle assembly (2) mounted on the frame (1); The non-fusible electrode gun head assembly (2) includes a gun base body (21) mounted on a frame (1), a tungsten electrode (23) mounted on the gun base body (21), a ceramic gas guide cover (24) mounted on the gun base body (21) to cover the tungsten electrode (23), and welding wires mounted on the gun base body (21) and spaced apart from the tungsten electrode (23). The tip of the tungsten electrode (23) protrudes through the ceramic gas guide shroud (24), and the end of the welding wire is inserted into the molten pool in the weld.

2. The welding unit of the non-consumable electrode gas shielded welding type internal welding machine according to claim 1, characterized in that: A gun head attitude control component (4) is installed on the frame (1); The gun head attitude control assembly (4) includes a rotating bracket (43) connected to the gun base body (21) and an adjusting cylinder (44) connected to the frame (1); The rotating bracket (43) is hinged to the frame (1), the bottom of the adjusting cylinder (44) is hinged to the frame (1), and the piston rod of the adjusting cylinder (44) is hinged to the rotating bracket (43) to which it belongs; the piston rod of the adjusting cylinder (44) drives the tungsten electrode (23) on the gun base body (21) to extend or retract into the frame (1) by extension and retraction.

3. The welding unit of the non-consumable electrode gas shielded welding type internal welding machine according to claim 1, characterized in that: The gun holder body (21) is provided with a welding wire end attitude retention assembly (3); The wire end attitude holding assembly (3) includes a rigid wire feeding tube (31) fixedly connected to the gun body (21), and the welding wire is threaded through the rigid wire feeding tube (31).

4. The welding unit of the non-consumable electrode gas shielded welding type internal welding machine according to claim 1, characterized in that: The frame (1) is provided with a wire feeding assembly (5); The wire feeding assembly (5) includes a wire spool (51) rotatably connected to the frame (1) and a wire feeding motor (52) that drives the wire spool (51) to rotate; the wire is wound on the wire spool (51).

5. The welding unit of the non-consumable electrode gas shielded welding type internal welding machine according to claim 4, characterized in that: A wire feeding reducer (53) connected to the wire feeding motor (52) is mounted on the frame (1). A wire feeding wheel (54) is sleeved on the output end of the wire feeding reducer (53), and the welding wire is wound on the wire feeding wheel (54). The frame (1) is equipped with a wire feeding shell (55), which covers the wire feeding wheel (54), and the wire feeding shell (55) has a through hole for the welding wire to enter and exit the wire feeding shell (55).

6. The welding unit of the non-consumable electrode gas shielded welding type internal welding machine according to claim 5, characterized in that: An elastic wire feeding tube (56) that communicates with a rigid wire feeding tube (31) is fixedly connected to the gun base body (21).

7. The welding unit of the non-consumable electrode gas shielded welding type internal welding machine according to claim 1, characterized in that: The frame (1) includes a cylinder-side outer arc plate (11), a welding wire-side outer arc plate (12), a middle arc plate (13), a front end upright plate (14), and a rear end upright plate (15); the cylinder-side outer arc plate (11), the welding wire-side outer arc plate (12), and the middle arc plate (13) are arranged in parallel; the rear end upright plate (15) and the front end upright plate (14) are fixedly connected to the edges of the cylinder-side outer arc plate (11), the welding wire-side outer arc plate (12), and the middle arc plate (13), connecting the cylinder-side outer arc plate (11), the welding wire-side outer arc plate (12), and the middle arc plate (13) together; The intermediate arc-shaped plate is provided with a receiving groove (131), and a sliding bracket (132) is slidably connected in the receiving groove (131). The sliding bracket (132) is slidably connected to the receiving groove (131). The output shaft of the wire feeding reducer (53) passes through the sliding bracket (132), and the wire feeding reducer (53), the wire feeding housing (55) and the sliding bracket (132) are fixedly connected. The wire feeding reducer (53) and the wire feeding housing (55) are mounted on the middle arc plate through the sliding bracket (132), and the wire feeding reducer (53) and the wire feeding housing (55) are arranged on both sides of the sliding bracket (132). A vibration assembly (6) is installed on the intermediate arc plate; the vibration assembly (6) includes a vibrator housing (61) fixedly connected to the intermediate arc plate; a push rod (62) is inserted in the vibrator housing (61) and moves back and forth in the vibrator housing (61); one end of the push rod (62) is fixedly connected to the housing of the wire feeding reducer (53), and the other end of the push rod (62) is driven by a vibration motor (65) to move back and forth in the vibrator housing (61).

8. The welding unit of the non-consumable electrode gas shielded welding type internal welding machine according to claim 7, characterized in that: The vibrator housing (61) has a receiving cavity (611) and an arrangement cavity (612). One end of the push rod (62) is inserted into the arrangement cavity (612) and passes out from the vibrator housing (61), and both ends of the push rod (62) pass out of the receiving cavity (611). A spring (63) is arranged in the receiving cavity (611), and the spring (63) is sleeved on the push rod (62); A pressure block (621) is fixedly connected to the push rod (62), the pressure block (621) is in contact with the end of the spring (63), and the push block is arranged between the arrangement cavity (612) and the spring (63); a cam (64) driven to rotate by a vibration motor (65) is installed in the arrangement cavity (612), and the cam (64) is in contact with the end of the push rod (62).

9. The welding unit of the non-consumable electrode gas shielded welding type internal welding machine according to claim 1, characterized in that: An auxiliary rod (16) is fixedly connected between the cylinder-side outer arc plate (11) and the welding wire-side outer arc plate (12).

10. The welding unit of the non-consumable electrode gas shielded welding type internal welding machine according to claim 1, characterized in that: An insulating plate for the gun head is placed between the gun base body (21) and the rotating bracket (43).

Images