A wire feeding gun for TIG welding in argon arc welding

Abstract

This patent introduces a wire feeding gun for TIG welding in argon arc welding, which includes a gun-shaped body, a ceramic nozzle, a first wire feeding conduit, a wire feeding mechanism, a damping check device and a second wire feeding conduit; the gun-shaped body includes a housing, a rotating shaft and a trigger; the ceramic nozzle is arranged at the muzzle end of the front end of the housing; the first wire feeding conduit is arranged inside the rear end of the housing; the wire feeding mechanism is arranged inside the housing at the end of the first wire feeding conduit; the second wire feeding conduit is arranged inside the housing between the trigger and the damping check device. The wire feeding gun for TIG welding in argon arc welding of the present invention has a simple structure, is easy to operate and convenient to carry; it can effectively control the wire feeding length, is convenient to control the wire feeding angle, can realize wire feeding by pulling the trigger, reducing the operation difficulty of the operator; the adjustable setting of the damping check device can meet the wire feeding of various specifications of wires, increasing the scope of application and high utilization rate.

Description

Technical Field

[0001] The invention belongs to the technical field of welding tools, and particularly relates to a wire feeding gun for TIG welding in argon arc welding. Background Art

[0002] TIG welding, argon arc welding, manual welding of non-consumable electrode argon arc welding. It can weld materials such as stainless steel, superalloy, titanium alloy, aluminum alloy, etc., and is widely used in the welding of pressure vessels, pipelines, etc. Its operation is flexible and the weld quality is high, and high-quality welding quality and appearance forming can be obtained. For the argon arc welding backing process, after non-destructive testing and radiographic inspection, the weld grade is above grade II. When performing manual TIG welding, it is necessary to continuously fill the welding arc molten pool with a welding wire. The welding wire has a length of about 1000 mm and a diameter ranging from Φ1 mm to Φ4 mm. Due to various working condition limitations, during welding, the welder uses fingers to continuously rub the welding wire and send it into the arc weld pool of the argon arc welding gun head. When welding, the welder wears welding gloves. The welding wire is relatively thin, the operation is inconvenient, it is not easy to accurately, evenly and stably feed the wire, and it is not easy to ensure the welding quality and appearance forming. Summary of the Invention

[0003] The purpose of the invention is to overcome the deficiencies of the prior art and provide a wire feeding gun for TIG welding in argon arc welding, which has a simple structure and convenient operation, can accurately and evenly send the welding wire into the weld of the welding arc molten pool, is easy to control the angle, distance and position; improves the welding efficiency and ensures the welding quality.

[0004] The technical solution adopted by the invention is a wire feeding gun for TIG welding in argon arc welding, which includes a gun-shaped body, a ceramic nozzle, a first wire feeding conduit, a wire feeding mechanism, a damping check valve device and a second wire feeding conduit;

[0005] The gun-shaped body includes a housing, a rotating shaft and a trigger. The two ends of the rotating shaft are arranged on the inner walls of both sides of the housing. The middle part of the trigger is provided with corresponding connecting ears. The rotating shaft passes through the connecting ears to arrange the upper part of the trigger inside the housing, and the lower part of the trigger extends out of the housing. The upper part of the trigger is successively provided with a connecting rod hole and a welding wire groove hole; a welding wire installation hole is arranged at the rear end of the housing; the ceramic nozzle is arranged at the muzzle end of the front end of the housing; the first wire feeding conduit is arranged inside the rear end of the housing, and the pipe hole at the rear end of the first wire feeding conduit is arranged in a funnel shape. The center of the pipe hole of the first wire feeding conduit corresponds to the center of the welding wire installation hole; the center of the welding wire groove hole in the upper part of the trigger corresponds to the center of the pipe hole of the first wire feeding conduit;

[0006] The wire feeding mechanism is arranged in the housing at the front end of the first wire feeding conduit; it includes a U-shaped clip, a lever block, a connecting rod, a spring and a stop block. Corresponding holes are provided on both sides of the U-shaped clip. A connecting hole corresponding to the connecting rod hole at the upper end of the trigger is provided at the upper end of the lever block. The two ends of the connecting rod are respectively arranged in the connecting rod hole at the upper end of the trigger and the connecting hole at the upper end of the lever block to connect the trigger and the lever block. The lower end of the lever block is arranged in the U-shaped middle of the U-shaped clip, and a wire passing hole corresponding to the holes on both sides of the U-shaped clip is provided at the lower end of the lever block. The stop block is arranged on the inner wall of the housing between the trigger and the U-shaped clip, and a through hole corresponding to the hole on the U-shaped clip is provided on the stop block. The spring is arranged between the stop block and the U-shaped clip, and the center of the spring axis is concentric with the hole on the U-shaped clip and the through hole on the stop block.

[0007] The damping check valve device includes a fixed block, a rubber ring, a compression spring, a gasket and an adjusting screw rod. The fixed block is arranged inside the housing at the muzzle end. A round hole is provided in the middle of the fixed block. The rubber ring is arranged in the round hole of the fixed block. The center of the rubber ring axis is concentric with the center of the round hole axis and is concentric with the wire groove hole on the trigger. A compression spring installation hole vertically penetrating to the middle round hole is provided on the upper side of the fixed block. The compression spring is arranged in the compression spring installation hole. The gasket is arranged on the compression spring. A threaded hole is provided on the housing corresponding to the compression spring installation hole. The lower end of the adjusting screw rod passes through the threaded hole on the housing and is arranged on the gasket in the compression spring installation hole.

[0008] The second wire feeding conduit is arranged in the housing between the trigger and the damping check valve device; the pipe hole at the end adjacent to the trigger of the second wire feeding conduit is set as a funnel-shaped structure; the center of the pipe hole of the second wire feeding conduit corresponds to the center of the wire groove hole of the trigger.

[0009] Specifically, the wire groove hole provided on the trigger is a strip-shaped hole; it is convenient for the up and down displacement of the welding wire during the wire feeding process.

[0010] Specifically, a threaded portion is provided at the muzzle end of the front end of the housing, and the ceramic nozzle is arranged at the front end of the housing through the threaded portion.

[0011] Specifically, the material of the second wire feeding conduit is a transparent material.

[0012] More specifically, a window is provided on the outer edge of the gun barrel of the gun-shaped body corresponding to the second wire feeding conduit; it is used to observe the welding wire.

[0013] Specifically, a knob is provided at the upper end of the adjusting screw rod; it is used to rotate the adjusting screw rod.

[0014] When in use, the welding wire is inserted from the welding wire installation hole at the rear end of the gun body, through the first wire feeding guide tube, and successively through the U-shaped clamp, the lever block spring, the stop block, the trigger, the second wire feeding guide tube to the center of the damping check device. According to the specifications of the welding wire, the degree of compression of the compression spring on the rubber ring is adjusted by screwing the adjusting screw in and out, and then the degree of compression of the rubber ring on the welding wire is adjusted; when the trigger is pulled and the trigger rotates around the rotating shaft, the connecting rod is pulled to generate displacement, and the connecting rod pulls the lever block to an inclined position, and the lower end of the lever block moves the U-shaped clamp to make it open. The U-shaped clip hole and the lever block wire hole are not concentric, and the U-shaped clip hole and the lever block wire hole produce friction on the welding wire, pulling the welding wire forward and feeding the spring. The trigger is released, and the spring returns the U-shaped clip and the lever piece to their original positions, and the lever block wire hole is concentric with the U-shaped clip hole. At the same time, due to the pressure of the damping check device, the welding wire does not return, and one wire feeding is completed. The stroke of each trigger pull determines the length of the wire feeding. Continuous, paused, and quick pulling of the trigger can control the wire feeding, stop feeding, and quick wire feeding.

[0015] Due to the adoption of the above-mentioned technical solution, the present invention has the following advantages:

[0016] The wire feeding gun for argon arc welding (TIG) of this patent has a simple structure, simple operation and is easy to carry; it can effectively control the wire feeding length and the wire feeding angle, and the wire feeding can be achieved by pulling the trigger, which reduces the operating difficulty of the operator; the setting of the damping and check device prevents the welding wire from retracting during the wire feeding process, thereby ensuring the stability of the wire feeding; the setting of the first wire feeding duct and the second wire feeding duct guides the insertion and feeding of the welding wire, facilitates the smooth feeding of the welding wire and prevents the displacement of the welding wire, thereby ensuring the welding quality and improving the welding efficiency; the adjustable setting of the damping and check device can meet the wire feeding of various specifications of welding wire, increases the scope of application, and has a high utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of this patent.

[0018] Figure 2 It is a schematic diagram of the internal structure of this patent.

[0019] Figure 3 This is a schematic diagram of the internal structure of this patent after the welding wire is installed.

[0020] Figure 4 It is a schematic diagram of the first wire feeding guide tube of this patent.

[0021] Figure 5 It is a schematic diagram of the second wire feeding tube of this patent.

[0022] Figure 6 It is a schematic diagram of the U-shaped clip of this patent.

[0023] Figure 7 Schematic structural diagram of the trigger of this patent.

[0024] Figure 8 It is a schematic diagram of the damping check device of this patent.

[0025] Figure 9 is Figure 8 Schematic diagram of the internal structure of

[0026] In the figure: 1 - welding wire, 2 - first wire feeding conduit, 3 - gun-shaped body, 31 - rotating shaft, 32 - trigger, 321 - connecting ear, 322 - connecting rod hole, 323 - welding wire slot hole, 33 - viewing window, 4 - ceramic nozzle, 51 - U-shaped clip, 52 - lever block, 53 - connecting rod, 54 - spring, 55 - stop block, 61 - fixing block, 611 - compression spring mounting hole, 62 - rubber ring, 63 - adjusting screw rod, 64 - compression spring, 65 - gasket, 7 - second wire feeding conduit. Specific implementation manner

[0027] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments. The protection scope of the present invention cannot be limited hereby. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0028] Combined with the attached Figures 1-9 A wire feeding gun for TIG welding of argon arc welding, including a wire feeding gun for TIG welding of argon arc welding, including a gun-shaped body 3, a ceramic nozzle 4, a first wire feeding conduit 2, a wire feeding mechanism, a damping check device and a second wire feeding conduit 7;

[0029] The gun-shaped body 3 includes a housing, a rotating shaft 31 and a trigger 32. Both ends of the rotating shaft 31 are arranged on the inner walls of both sides of the housing. A corresponding connecting ear 321 is arranged in the middle of the trigger 32. The connecting ear 321 through which the rotating shaft 31 passes sets the upper part of the trigger 32 inside the housing, and the lower part of the trigger 32 extends out of the housing. A connecting rod hole 322 and a welding wire slot hole 323 are successively arranged on the upper part of the trigger 32. The welding wire slot hole 323 is a strip-shaped hole; it is convenient for the up and down displacement of the welding wire 1 during the wire feeding process; a welding wire installation hole is arranged at the rear end of the housing; a threaded part is arranged at the muzzle end of the front end of the housing, and the ceramic nozzle 4 is arranged at the front end of the housing through the threaded part.

[0030] The first wire feeding conduit 2 is arranged inside the rear end of the housing. The pipe hole at the rear end of the first wire feeding conduit 2 is set in a funnel shape. The center of the pipe hole of the first wire feeding conduit corresponds to the center of the welding wire installation hole; the center of the welding wire slot hole 323 of the trigger 32 corresponds to the center of the pipe hole of the first wire feeding conduit 2.

[0031] The wire feeding mechanism is arranged in the housing at the front end of the first wire feeding conduit 2; it includes a U-shaped clip 51, a lever block 52, a connecting rod 53, a spring 54 and a stop block 55. Corresponding holes are provided on both sides of the U-shaped clip 51. A connecting hole corresponding to the upper connecting rod hole 322 of the trigger 32 is provided at the upper end of the lever block 52. Both ends of the connecting rod 53 are respectively arranged in the upper connecting rod hole 322 of the trigger 32 and the connecting hole at the upper end of the lever block 52 to connect the trigger 32 and the lever block 52. The lower end of the lever block 52 is arranged in the middle of the U-shape of the U-shaped clip 51, and a wire passing hole corresponding to the holes on both sides of the U-shaped clip 51 is provided at the lower end of the lever block 52. The stop block 55 is arranged on the inner wall of the housing between the trigger 32 and the U-shaped clip 51, and a through hole corresponding to the hole on the U-shaped clip 51 is provided on the stop block 55. The spring 54 is arranged between the stop block 55 and the U-shaped clip 51, and the central axis of the spring 54 is concentric with the hole on the U-shaped clip 51 and the through hole on the stop block 55.

[0032] The damping check valve device includes a fixed block 61, a rubber ring 62, a compression spring 64, a gasket 65 and an adjusting screw rod 63; the fixed block 61 is arranged inside the housing at the muzzle end. A round hole is provided in the middle of the fixed block 61. The rubber ring 62 is arranged in the round hole of the fixed block 61. The central axis of the rubber ring 62 is concentric with the central axis of the round hole and is concentric with the wire groove hole 323 on the trigger 32. A compression spring mounting hole 611 vertically penetrating to the middle round hole is provided on the upper side of the fixed block 61. The compression spring 64 is arranged in the compression spring mounting hole 611, and the gasket 65 is arranged on the compression spring 64. A threaded hole is provided on the housing corresponding to the compression spring mounting hole 611, and the lower end of the adjusting screw rod 63 passes through the threaded hole on the housing and is arranged on the gasket 65 in the compression spring mounting hole 611.

[0033] The second wire feeding conduit 7 is arranged in the housing between the trigger 32 and the damping check valve device; the second wire feeding conduit 7 is made of a transparent material, and the tube hole at the end adjacent to the trigger of the second wire feeding conduit 7 is set to a funnel-shaped structure; the central axis of the tube hole of the second wire feeding conduit 7 corresponds to the central axis of the wire groove hole 323 of the trigger 32; a window 33 is provided on the outer edge of the gun-shaped body 3 corresponding to the second wire feeding conduit 7 for observing the welding wire 1.

[0034] When in use, the welding wire 1 is inserted from the welding wire mounting hole at the rear end of the gun-shaped body 3, through the first wire feeding guide tube 2, and sequentially through the U-shaped clip 51, the lever block 52, the spring 54, the stopper 55, the trigger 32, the second wire feeding guide tube 7 to the center of the damping check device. According to the specifications of the welding wire 1, the compression degree of the compression spring on the rubber ring 62 is adjusted by screwing the adjusting screw in and out, and then the compression degree of the rubber ring 62 on the welding wire 1 is adjusted; when the trigger 32 is pulled and the trigger 32 rotates around the rotating shaft 31, the connecting rod 53 is pulled to generate displacement, and the connecting rod 53 pulls the lever block 52 to an inclined position, and the lower end of the lever block 52 toggles the U-shaped clip The plate 51 makes it open, the wire hole of the lever block 52 is not concentric with the hole of the U-shaped clip 51, the hole of the U-shaped clip 51 and the wire hole of the lever block 52 produce friction on the welding wire 1, pulling the welding wire 1 forward to feed the wire, and the spring 54 is compressed; the trigger is released, the spring 54 resets the U-shaped clip 51 and the lever block 52, and the wire hole of the lever block 52 is concentric with the hole of the U-shaped clip 51; at the same time, due to the pressure of the damping check device, the welding wire 1 does not return, and one wire feeding is completed; the stroke of each trigger 32 is determined by the length of the wire feeding, and the trigger 32 is pulled continuously, paused, and quickly to control the wire feeding to continue feeding, stop feeding, and feed quickly.

[0035] Parts of the present invention not described in detail are prior art.

[0036] The embodiments selected herein for the purpose of disclosing the invention are considered appropriate at the moment, but it should be understood that the present invention is intended to include all changes and modifications of the embodiments that fall within the scope of the present concept and invention.

Claims

1. A wire feeding gun for TIG welding in argon arc welding, characterized in that: it includes a gun-shaped body, a ceramic nozzle, a first wire feeding conduit, a wire feeding mechanism, a damping check valve device and a second wire feeding conduit; The gun-shaped body includes a housing, a rotating shaft and a trigger. The two ends of the rotating shaft are arranged on the inner walls of both sides of the housing. A corresponding connecting ear is arranged in the middle of the trigger. The connecting ear through which the rotating shaft passes sets the upper part of the trigger inside the housing, and the lower part of the trigger extends out of the housing. The upper part of the trigger is successively provided with a connecting rod hole and a wire groove hole; a wire installation hole is arranged at the rear end of the housing; a threaded part is arranged at the muzzle end of the front end of the housing, and the ceramic nozzle is arranged at the front end of the housing through the threaded part; the first wire feeding conduit is arranged inside the rear end of the housing, and the tube hole at the rear end of the first wire feeding conduit is arranged in a funnel shape. The center of the tube hole of the first wire feeding conduit corresponds to the center of the wire installation hole; the center of the wire groove hole on the upper part of the trigger corresponds to the center of the tube hole of the first wire feeding conduit; The wire feeding mechanism is arranged in the housing at the front end of the first wire feeding conduit; it includes a U-shaped clip, a lever block, a connecting rod, a spring and a stop block. Corresponding holes are arranged on both sides of the U-shaped clip. A connecting hole corresponding to the connecting rod hole at the upper end of the trigger is arranged at the upper end of the lever block. The two ends of the connecting rod are respectively arranged in the connecting rod hole at the upper end of the trigger and the connecting hole at the upper end of the lever block to connect the trigger and the lever block; the lower end of the lever block is arranged in the middle of the U of the U-shaped clip, and a wire passing hole corresponding to the holes on both sides of the U-shaped clip is arranged at the lower end of the lever block; the stop block is arranged on the inner wall of the housing between the trigger and the U-shaped clip, and a through hole corresponding to the hole on the U-shaped clip is arranged on the stop block; the spring is arranged between the stop block and the U-shaped clip, and the center of the spring axis is concentric with the hole on the U-shaped clip and the through hole on the stop block; The damping check valve device includes a fixed block, a rubber ring, a compression spring, a gasket and an adjusting screw rod; the fixed block is arranged inside the housing at the muzzle end. A round hole is arranged in the middle of the fixed block. The rubber ring is arranged in the round hole of the fixed block. The center of the rubber ring axis is concentric with the center of the round hole axis and is concentric with the wire groove hole on the trigger; a compression spring installation hole vertically penetrating to the middle round hole is arranged on the upper side of the fixed block, and the compression spring is arranged in the compression spring installation hole; the gasket is arranged on the compression spring; a threaded hole is arranged on the housing corresponding to the compression spring installation hole, and the lower end of the adjusting screw rod passes through the threaded hole on the housing and is arranged on the gasket in the compression spring installation hole; The second wire feeding conduit is arranged in the housing between the trigger and the damping check valve device; the tube hole at the end adjacent to the trigger of the second wire feeding conduit is arranged in a funnel-shaped structure; the center of the tube hole of the second wire feeding conduit corresponds to the center of the wire groove hole of the trigger. The material of the second wire feeding conduit is a transparent material, and a window is arranged on the outer edge of the gun-shaped body corresponding to the second wire feeding conduit.

2. The wire feeding gun for TIG welding in argon arc welding according to claim 1, characterized in that: the wire groove hole arranged on the trigger is a strip-shaped hole.

3. The wire feeding gun for TIG welding in argon arc welding according to claim 1, characterized in that: a knob is arranged at the upper end of the adjusting screw rod.

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