Welding wire feeding device for automatic submerged arc welding

Abstract

The utility model discloses a welding wire supply device for automatic submerged arc welding. In the existing submerged automatic arc welding process, welding work needs to be stopped after welding wires are used up, a new welding wire reel is manually replaced, the number of times of arc starting and arc quenching in the welding process can be increased due to the fact that the welding wires are replaced, and welding defects such as craters and cracks are generated. The welding machine comprises a welding machine body, the welding machine body comprises a movable welding trolley (3), a stand column (4) is vertically fixed to the movable welding trolley, a movable cross beam (5) is fixed to the stand column, and a welding device is fixed to the outer end of the cross beam; a welding wire supply device (1) is placed on the side face of the welding machine body, and a welding wire of the welding wire supply device is supplied to the welding device through a wire guiding mechanism (11). And the welding wire supply device comprises two welding wire reels (1a) which are connected in the box body and are arranged up and down, two wire pressing guide wheels (1e), a double-path wire threading device (1g), an induction heater (1h) and a wire rolling mechanism (1j). The automatic submerged arc welding wire feeding device is used for submerged arc automatic welding wire feeding.

Description

Technical Field

[0001] The utility model relates to the field of welding equipment, in particular to a welding wire supply device for submerged arc automatic welding. Background Art

[0002] Submerged arc welding is a welding method in which the arc burns under the flux layer. The welding depth and welding efficiency are much higher than manual arc welding. It has many advantages such as no arc light, less smoke and dust, and good labor protection. This makes it the main welding method in the production of important steel structures such as pressure vessels, pipe section manufacturing, box beams and columns.

[0003] The welding materials used in submerged arc automatic welding are mainly welding wire and flux. Welding wire is a metal wire-shaped welding material used as a filler metal or as a conductor at the same time. Existing submerged arc automatic welding machines all use the welding wire wheel located at the top of the welding device to automatically feed the welding wire in conjunction with the wire feeding mechanism, which is relatively labor-saving. However, after the welding wire is used up during the welding process, the welding work needs to be stopped and a new welding wire reel needs to be replaced manually. Replacing the welding wire will increase the number of arcing and arcing during the welding process, leading to the generation of welding defects such as arc craters and cracks, which seriously affects the production efficiency and the improvement of welding quality. At the same time, due to the large size of some workpieces, the entire operation process when the welder replaces the welding wire is located at a higher spatial position, which has certain risks of high-altitude operations.

[0004] Therefore, a welding wire supply device for submerged arc automatic welding is needed. Utility Model Content

[0005] The utility model aims to provide a welding wire supply device for submerged arc automatic welding in view of the problems existing in the prior art.

[0006] The above objectives are achieved through the following solutions:

[0007] A welding wire feeding device for submerged arc automatic welding, comprising: a welding machine body, the welding machine body comprising a mobile welding vehicle, a column being vertically fixed on the mobile welding vehicle, a movable crossbeam being fixed on the column, and a welding device being fixed on the outer end of the crossbeam;

[0008] A welding wire supply device is placed on the side of the welding machine body, and the welding wire of the welding wire supply device is supplied to the welding device through a wire guiding mechanism;

[0009] The welding wire supply device comprises two welding wire reels arranged up and down and connected in a box body, two wire pressing guide wheels, a double-path wire threader, an induction heater and a wire rolling mechanism.

[0010] The welding wire supply device for submerged arc automatic welding, the dual-path wire threader comprises a shell, the shell has two wire threading cavities and a collecting cavity, and a pressure sensor is fixed in each of the wire threading cavities.

[0011] The welding wire supply device for submerged arc automatic welding, the wire rolling mechanism includes two wire tying plates, each of the wire tying plates is connected to two wire tying wheels via a rotating shaft, the wire tying plates are provided with sliding holes, and the fixing studs welded on the box body pass through the sliding holes and are threadedly connected to the nuts.

[0012] The welding wire supply device for submerged arc automatic welding comprises a welding wire wheel and a flux hopper fixed on the upper part of the crossbeam, the bottom of the flux hopper is connected to a feed pipe, the outlet of the feed pipe is located at the conductive nozzle of the welding gun, and a wire feeding mechanism and a conductive nozzle are installed at the outer end of the crossbeam.

[0013] The welding wire supply device for submerged arc automatic welding has a welding wire reel motor fixed to the rear end of the box, and the output shaft of the welding wire reel motor passes through the box and is fixedly connected to the reel shaft at the center of the welding wire reel.

[0014] The welding wire supply device for submerged arc automatic welding has a wire crimping guide wheel motor fixed to the rear end of the box, and the output shaft of the wire crimping guide wheel motor passes through the box and is fixedly connected to the guide wheel shaft at the center of the wire crimping guide wheel. Beneficial Effects

[0015] 1. The utility model can roll and connect the first and second welding wires through the cooperation of relevant mechanisms to carry out wire continuation work, and can continuously feed welding wire to the welding machine, thereby reducing the frequency of welding wire replacement during the welding process, reducing the number of arc starting and arc extinguishing times caused by replacing welding wire, and improving welding quality and work efficiency.

[0016] 2. The device of the utility model shortens the wire dragging distance during welding, and continuously delivers the welding wire to the welding machine body through the welding wire supply device, thereby reducing the labor intensity of the operator and the risk of high-altitude operations.

[0017] 3. The device of the utility model adjusts the gap between each group of rollers of the wire rolling mechanism according to the different thicknesses of welding wires, improves the quality of welding wire connection, and ensures a stable supply of welding wire to the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model device;

[0019] Figure 2 It is a structural schematic diagram of a welding wire supply device;

[0020] In the figure: 1. welding wire supply device; 2. welding wire; 3. mobile welding car; 4. column; 5. movable crossbeam; 6. flux hopper; 7. feeding pipe; 8. wire feeding mechanism; 9. conductive nozzle; 10. welding wire wheel; 11. wire drawing mechanism; 12. electronic control device; 1a. welding wire reel; 1a1. welding wire reel motor; 1a2. reel shaft; 1b. lower welding wire reel; 1c. upper welding wire; 1d. lower welding wire; 1e. wire pressing guide wheel; 1e1. wire pressing guide wheel motor; 1e2. guide wheel shaft; 1f. lower wire pressing guide wheel; 1g. dual-path wire threader; 1g1. wire threading chamber; 1g2. pressure sensor; 1g3. collecting chamber; 1h. induction heating mechanism; 1j. wire rolling mechanism; 1j1. wire tying wheel; 1j2. wire tying plate; 1j3. sliding hole; 1j4. fixing stud. DETAILED DESCRIPTION

[0021] Reference Figure 1-Figure 2 A welding wire feeding device for submerged arc automatic welding, comprising: a welding machine body, the welding machine body comprising a mobile welding vehicle 3, a column 4 being vertically fixed on the mobile welding vehicle, a movable crossbeam 5 being fixed on the column, and a welding device being fixed on the outer end of the crossbeam;

[0022] A welding wire supply device 1 is placed on the side of the welding machine body, and the welding wire of the welding wire supply device is supplied to the welding device through a wire guide mechanism 11;

[0023] The welding wire supply device comprises two welding wire reels 1a arranged up and down and connected in a box, two wire pressing guide wheels 1e, a double-path wire threader 1g, an induction heater 1h and a wire rolling mechanism 1j.

[0024] The welding wire supply device for submerged arc automatic welding, the dual-path wire threader comprises a shell, the shell has two wire threading cavities 1g1 and a collecting cavity 1g3, and a pressure sensor 1g2 is fixed in each of the wire threading cavities.

[0025] The welding wire supply device for submerged arc automatic welding, the wire rolling mechanism includes two wire tying plates 1j2, each of which is connected to two wire tying wheels 1j1 through a rotating shaft, and the wire tying plates are provided with sliding holes 1j3, and the fixing studs 1j4 welded on the box body pass through the sliding holes and are threadedly connected to the nuts.

[0026] The welding wire supply device for submerged arc automatic welding comprises a welding wire wheel 10 and a flux hopper 6 fixed on the upper part of a crossbeam 5, the bottom of the flux hopper 6 is connected to a feed pipe 7, the outlet of the feed pipe 7 is located at the conductive nozzle 9 of the welding gun, and a wire feeding mechanism 8 and a conductive nozzle 9 are installed at the outer end of the crossbeam 5.

[0027] The welding wire supply device for submerged arc automatic welding has a welding wire reel motor 1a1 fixed to the rear end of the box, and the output shaft of the welding wire reel motor passes through the box and is fixedly connected to the reel shaft 1a2 at the center of the welding wire reel.

[0028] The welding wire feeding device for submerged arc automatic welding has a wire crimping guide wheel motor 1e1 fixed to the rear end of the box, and the output shaft of the wire crimping guide wheel motor passes through the box and is fixedly connected to the guide wheel shaft 1e2 at the center of the wire crimping guide wheel.

[0029] The welding wire 1c is introduced into the double-path wire threader 1g through the wire pressing guide wheel 1e. Similarly, the welding wire 1d is introduced into the double-path wire threader 1g through the lower wire pressing guide wheel 1f. The two welding wires correspond to the two wire threading cavities of the double-path wire threader respectively. The inner wall of each wire threading cavity of the double-path wire threader 1g is made of wear-resistant and highly elastic material.

[0030] A pressure sensor is fixed in each wire threading cavity, and the pressure sensor is placed at the bottom of the wear-resistant and highly elastic material. The welding wire 1c passes through the induction heater 1h and the wire rolling mechanism 1J for normal welding work, and the other welding wire 1d passes through the induction heater 1h for standby.

[0031] The welding wire reel motor, the wire pressing guide wheel motor, the pressure sensor in the dual-path wire threader, the induction heating device 1h and the electronic control device 12 are electrically connected.

[0032] During welding operation, the movable welding vehicle 3 is controlled to move to a suitable horizontal position along a specific track, and the movable crossbeam is adjusted to a suitable working height according to the size of the workpiece to be welded; the welding wire 2 is supplied to the welding device from the welding wire supply device 1 through the wire guide mechanism 11, and extends from the conductive nozzle 9 through the wire feeding mechanism 8; the flux flows from the feeding pipe 7 at the bottom of the flux hopper 6 to the conductive nozzle 9 of the welding gun.

[0033] The supply status of the working welding wire 1c is monitored by the inner wall pressure sensor of the double-way wire threader 1g. When the first welding wire 1c is used up, the pressure sensor of the double-way wire threader 1g feeds back a signal to the electronic control device 12 to start the induction heater 1h. The welding wires 1c and 1d are heated to a nearly molten state under the action of eddy currents. The wire rolling mechanism 1j rolls and connects the first wire 1c and the second wire 1d to carry out the wire-relaying work. During the rolling process, the electronic control device 12 controls the welding wire reel motor and the wire pressing guide wheel motor to reduce the rotation speed of the welding wire reel 1a and the lower welding wire reel 1b, the wire pressing guide wheel 1e and the lower wire pressing guide wheel 1f and the wire feeding mechanism 8 to ensure the effect of the welding wire rolling connection. According to the different thicknesses of the welding wires 1c and 1d, the gap between the wire tying wheels of the two wire tying plates of the wire rolling mechanism 1j can be adjusted to improve the quality of the welding wire connection and ensure the stable supply of the welding wire in the system.

[0034] The device can continuously feed welding wire to the welding machine, reducing the frequency of welding wire replacement during the welding process, reducing the number of arc starting and arc extinguishing times caused by replacing the welding wire, improving the welding quality and working efficiency, while shortening the welding wire dragging distance during the welding process, reducing the operator's labor intensity and the risk of high-altitude operations.

Claims

1. A welding wire feeding device for submerged arc automatic welding, comprising: The welding machine body is characterized in that: the welding machine body comprises a mobile welding vehicle, a column is vertically fixed on the mobile welding vehicle, a movable crossbeam is fixed on the column, and a welding device is fixed on the outer end of the crossbeam; A welding wire supply device is placed on the side of the welding machine body, and the welding wire of the welding wire supply device is supplied to the welding device through a wire guiding mechanism; The welding wire supply device comprises two welding wire reels arranged up and down and connected in a box body, two wire pressing guide wheels, a double-path wire threader, an induction heater and a wire rolling mechanism.

2. The welding wire feeding device for submerged arc automatic welding according to claim 1 is characterized in that: The dual-path wire threader comprises a shell, wherein the shell is provided with two wire threading cavities and a collecting cavity, and a pressure sensor is fixed in each of the wire threading cavities.

3. The welding wire feeding device for submerged arc automatic welding according to claim 1 is characterized in that: The wire rolling mechanism comprises two wire tying plates, each of which is connected with two wire tying wheels via a rotating shaft, and the wire tying plates are provided with sliding holes, and the fixing studs welded on the box body pass through the sliding holes and are threadedly connected with nuts.

4. The welding wire feeding device for submerged arc automatic welding according to claim 1 is characterized in that: The welding device comprises a welding wire wheel and a flux hopper fixed on the upper part of the crossbeam. The bottom of the flux hopper is connected to a feed pipe, the outlet of the feed pipe is located at the conductive nozzle of the welding gun, and a wire feeding mechanism and a conductive nozzle are installed at the outer end of the crossbeam.

5. The welding wire feeding device for submerged arc automatic welding according to claim 1 is characterized in that: A welding wire reel motor is fixed at the rear end of the box body, and an output shaft of the welding wire reel motor passes through the box body and is fixedly connected with a reel shaft at the center of the welding wire reel.

6. The welding wire feeding device for submerged arc automatic welding according to claim 1, characterized in that: A wire crimping guide wheel motor is fixed at the rear end of the box body, and the output shaft of the wire crimping guide wheel motor passes through the box body and is fixedly connected to the guide wheel shaft at the center of the wire crimping guide wheel.

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