A double wire welding gun

Abstract

The present invention relates to the field of automatic welding technology, and in particular to a double-wire welding gun, which solves the problem of large friction and severe wear between the welding wire and the inner wall of the wire feeding tube. A double-wire welding gun comprises a gun body, a joint and two conductive nozzles distributed in parallel. Two wire feeding channels distributed in parallel are opened in the gun body, and springs are arranged in the wire feeding channels. The outer sides of the two springs are sleeved with locking rings. One end of the conductive nozzle is fixedly connected to a conductive seat, and one side of the conductive seat is fixedly connected to a conductive rod. The present invention has a built-in spring in the wire feeding channel, and the welding wire contacts the spring during the welding process. The surface of the spring is an arc surface with small friction. In addition, the surface hardness of the spring is high and the wear resistance is good, which reduces the friction between the welding wire and the wire feeding channel and can significantly improve the life of the welding gun. In addition, the gun body and the conductive part are connected by a spring, which has good flexibility, can conform to the bending of the welding wire, and the wire feeding is relatively smooth.

Description

Technical Field

[0001] The invention relates to the technical field of automatic welding, in particular to a double-wire welding gun. Background Art

[0002] With the widespread application of gas-electric automatic welding devices in the heavy industry, two thin welding wires are often used for welding at the same time in automatic welding equipment. In order to ensure the welding quality, double-wire welding guns are often used for welding at the same time.

[0003] Twin-wire welding can achieve both high-speed welding and high deposition rate welding, which means it can be used for both thin plate structures and thick and large structure products. Thin twin-wire automatic welding can significantly increase productivity compared to thin single-wire welding, and is convenient for changing the composition of welding wires and adjusting the composition of welds.

[0004] In the existing fine twin-wire welding process, the welding wire is wound in a wire reel. During welding, the welding wire is fed through a wire feeding device through a welding gun and a conductive nozzle for welding. Since the welding wire is mostly low-carbon steel wire with high hardness, an ordinary twin-wire welding gun has large friction between the welding wire and the inner wall of the wire feeding tube, resulting in severe wear and affecting the life of the welding gun. In addition, the entire welding gun is rigidly connected and cannot adapt to the bending of the welding wire, and the wire feeding is not smooth enough. Therefore, a twin-wire welding gun is needed to solve the above problems existing in the prior art. Summary of the invention

[0005] The purpose of the invention is to provide a double-wire welding gun, which solves the problem of large friction and severe wear between the welding wire and the inner wall of the wire feeding tube in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A twin-wire welding gun comprises a gun body, a joint and two conductive nozzles which are distributed in parallel. Two wire feeding channels which are distributed in parallel are provided in the gun body. Springs are arranged in the wire feeding channels. Locking rings are sleeved on the outer sides of the two springs. One end of the conductive nozzle is fixedly connected to a conductive seat. One side of the conductive seat is fixedly connected to a conductive rod. Both ends of the conductive rod are fixedly connected to the conductive seat and the locking ring respectively through locking nuts.

[0008] Preferably, the wire feeding channel is a three-section wire feeding channel with a large diameter in the middle and small diameters at both ends, and the inner diameter of the spring is larger than the diameters at both ends of the wire feeding channel.

[0009] Preferably, an adjustment device is provided at the connection between the wire feeding channel and the joint, and the adjustment device includes a fixed sleeve arranged at the entrance of the wire feeding channel, a sliding sleeve is slidably connected to the outside of the fixed sleeve, four centrally symmetrically distributed rotating rods are rotatably connected to one side of the sliding sleeve, a sliding block is provided at the end of the rotating rod away from the sliding sleeve, an arc plate is provided on the side of the sliding block close to the rotating rod, a sliding rod is fixedly connected to the outside of the sliding sleeve, and a fixing piece is provided at one end of the sliding rod.

[0010] Preferably, one end of the sliding rod slides through the joint, one end of the sliding rod is engraved with a thread, and the fixing piece is a fixing nut matched with the threaded end of the sliding rod.

[0011] Preferably, the fixing sleeve is in a "funnel" shape.

[0012] Preferably, a protrusion is provided at the bottom ends of the four arc-shaped plates along the center of the wire feeding channel.

[0013] Preferably, a clamping device is provided at the connection between the wire feeding channel and the conductive nozzle, and the clamping device includes a rubber sleeve, a clamping ring is sleeved on the outer side of the rubber sleeve, a clamping rod is fixedly connected to the outer side of the clamping ring, the top end of the clamping rod is engraved with threads, and a clamping nut adapted to the clamping rod is provided on the outer side of the clamping rod.

[0014] Preferably, the rubber sleeve is in a "funnel" shape, and the diameters of the two ends of the rubber sleeve are respectively matched with the diameters of the wire feeding channel.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By building a spring into the wire feeding channel, the welding wire contacts the spring during welding. The surface of the spring is an arc surface with less friction. In addition, the surface hardness of the spring is high and the wear resistance is good, which reduces the friction between the welding wire and the wire feeding channel and significantly improves the life of the welding gun. In addition, the gun body and the conductive part are connected by a spring, which has good flexibility, can conform to the bending of the welding wire, and the wire feeding is smoother.

[0017] 2. During the welding process, when the welding wire passes through the wire feeding channel, the four arc plates are adjusted to form a ring area by adjusting the adjustment device, forming a preliminary positioning for the welding wire, ensuring that the welding wire is always coaxial with the wire feeding channel. It can be used for welding wires of various specifications, reducing the surface contact between the welding wire and the spring, thereby reducing its friction and thus increasing the life of the welding gun;

[0018] 3. Reposition the end of the welding wire through the clamping device so that the welding wire is in the center of the wire feeding channel, which can not only ensure smooth wire feeding, but also keep the welding wire straight, thereby improving the welding effect of the welding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0020] Figure 1 It is a main cross-sectional schematic diagram of the present invention;

[0021] Figure 2 It is a main schematic diagram of the present invention;

[0022] Figure 3 for Figure 1 A magnified schematic diagram of the middle A area;

[0023] Figure 4 It is a schematic side view of the curved plate of the present invention;

[0024] Figure 5 for Figure 1 Enlarged schematic diagram of area B in the middle.

[0025] In the figure: 1. gun body; 2. joint; 3. conductive nozzle; 4. wire feeding channel; 5. spring; 6. locking ring; 7. conductive seat; 8. conductive rod; 9. locking nut; 10. adjusting device; 101. fixed sleeve; 102. sliding sleeve; 103. rotating rod; 104. sliding block; 105. arc plate; 106. sliding rod; 107. fixing piece; 108. protrusion; 11. clamping device; 111. rubber sleeve; 112. clamping ring; 113. clamping rod; 114. clamping nut. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] Reference Figure 1 and Figure 2 , Embodiment 1 provided by the present invention:

[0028] A double-wire welding gun comprises a gun body 1, a joint 2 and two conductive nozzles 3 which are distributed in parallel. Two wire feeding channels 4 which are distributed in parallel are provided in the gun body 1. Specifically, two independent wire reels respectively feed the welding wire from the joint 2 into the wire feeding channel 4 inside the gun body 1 through a wire feeding device, and the welding wire reaches the conductive nozzle 3 for welding. A spring 5 is provided in the wire feeding channel 4, and a locking ring 6 is sleeved on the outer side of the two springs 5. A conductive seat 7 is fixedly connected to one end of the conductive nozzle 3, and a conductive rod is fixedly connected to one side of the conductive seat 7. 8. Both ends of the conductive rod 8 are fixedly connected to the conductive seat 7 and the locking ring 6 respectively through locking nuts 9. Specifically, when the welding wire passes through the wire feeding channel 4, the welding wire contacts the spring 5 during the welding process. The surface of the spring 5 is an arc surface with small friction. In addition, the surface hardness of the spring 5 is high and the wear resistance is good, which reduces the friction between the welding wire and the wire feeding channel 4 and can significantly improve the life of the gun body 1. At the same time, the gun body 1 is connected to the locking ring 6 through the spring 5, which has good flexibility and can adapt to the bending of the welding wire, making the welding wire feeding smoother.

[0029] Furthermore, the wire feeding channel 4 is a three-section wire feeding channel 4 with a large diameter in the middle and small diameters at both ends. The inner diameter of the spring 5 is larger than the diameters at both ends of the wire feeding channel 4. When the welding wire enters the wire feeding channel 4, the wire feeding channel 4 with a small diameter performs a preliminary correction so that the welding wire is always coaxial with the wire feeding channel 4, reducing the contact between the welding wire and the outer surface of the spring 5, thereby reducing the friction between the welding wire and the wire feeding channel 4, and further improving the service life of the gun body 1.

[0030] Reference Figure 1-4 , Embodiment 2 provided by the present invention:

[0031] An adjusting device 10 is provided at the connection between the wire feeding channel 4 and the joint 2. The adjusting device 10 includes a fixed sleeve 101 provided at the entrance of the wire feeding channel 4. A sliding sleeve 102 is slidably connected to the outside of the fixed sleeve 101. One side of the sliding sleeve 102 is rotatably connected to four rotating rods 103 distributed symmetrically with the center. A slider 104 is provided at one end of the rotating rod 103 away from the sliding sleeve 102. An arc plate 105 is provided on the side of the slider 104 close to the rotating rod 103. A sliding rod 106 is fixedly connected to the outside of the sliding sleeve 102. A fixing piece 107 is provided at one end of the sliding rod 106. Specifically, the welding wire is connected When the head 2 enters the wire feeding channel 4 inside the gun body 1, the sliding sleeve 102 is driven to slide on the fixed sleeve 101 by pulling the sliding rod 106. When the sliding sleeve 102 slides, the four rotating rods 103 rotate at the same time, and synchronously drive the four sliders 104 to move toward the center of the wire feeding channel 4, so that the four arc plates 105 form a circular fixed area, and the sliding rod 106 is fixed by the fixing piece 107, so that the welding wire enters the wire feeding channel 4 straightly, and ensures that the welding wire is always fed at the center position of the wire feeding channel 4, reducing the contact between the welding wire and the spring 5, thereby further improving the service life of the gun body 1.

[0032] Furthermore, one end of the sliding rod 106 slides through the joint 2, one end of the sliding rod 106 is engraved with a thread, and the fixing piece 107 is a fixing nut adapted to the threaded end of the sliding rod 106. The threaded connection between the sliding rod 106 and the fixing piece 107 makes the fixing connection effect of the sliding rod 106 better, thereby ensuring the stability of the wire feeding and reducing the contact between the welding wire and the outer surface of the spring 5 in the wire feeding channel 4.

[0033] Furthermore, the fixed sleeve 101 is in a "funnel" shape, which makes it easier and more convenient for the welding wire to enter the wire feeding channel 4 and prevents the welding wire from blocking the entrance of the wire feeding channel 4.

[0034] Furthermore, a protrusion 108 is provided at the bottom end of the four arc-shaped plates 105 along the center of the wire feeding channel 4. The setting of the protrusion 108 allows the welding wire to be better located in the center of the wire feeding channel 4 for straight wire feeding. In addition, the welding wire can be clamped and cut by the protrusion 108.

[0035] Reference Figure 1 , Figure 2 and Figure 5 , Embodiment 3 provided by the present invention:

[0036] A clamping device 11 is provided at the connection between the wire feeding channel 4 and the conductive nozzle 3, and the clamping device 11 includes a rubber sleeve 111, and a clamping ring 112 is sleeved on the outer side of the rubber sleeve 111. A clamping rod 113 is fixedly connected to the outer side of the clamping ring 112. The top of the clamping rod 113 is engraved with threads, and a clamping nut 114 adapted to the clamping rod 113 is provided on the outer side of the clamping rod 113. Specifically, when the welding wire passes through the rubber sleeve 111, the size of the rubber sleeve 111 can be adjusted by moving the clamping rod 113, so that the diameter of the welding wire is slightly smaller than the size of the rubber sleeve 111, and the clamping rod 113 is clamped by the clamping nut 114 to ensure that the welding wire is fed straight, thereby reducing the friction between the welding wire and the wire feeding channel 4.

[0037] Furthermore, the rubber sleeve 111 is in a "funnel" shape, and the diameters of the two ends of the rubber sleeve 111 are respectively adapted to the diameters of the wire feeding channel 4, so as to facilitate the welding wire to be sent from the wire feeding channel 4 to the conductive nozzle 3 for welding.

[0038] Working principle: Two independent wire reels respectively feed the welding wire from the joint 2 into the wire feeding channel 4 inside the gun body 1 through the wire feeding device, and then the welding wire reaches the conductive nozzle 3 for welding. When the welding wire enters the wire feeding channel 4 inside the gun body 1 through the joint 2, the sliding sleeve 102 is driven to slide on the fixed sleeve 101 by pulling the sliding rod 106. When the sliding sleeve 102 slides, the four rotating rods 103 rotate at the same time, synchronously driving the four sliders 104 to move toward the center of the wire feeding channel 4, so that the four arc plates 105 form a circular fixed area, and the fixing member 107 is used to fix the welding wire. The sliding rod 106 is fixed so that the welding wire enters the wire feeding channel 4 straightly, and it is ensured that the welding wire is always fed at the center position in the wire feeding channel 4, reducing the contact between the welding wire and the spring 5, thereby further improving the service life of the gun body 1; when the welding wire passes through the rubber sleeve 111, the size of the rubber sleeve 111 can be adjusted by moving the clamping rod 113, so that the diameter of the welding wire is slightly smaller than the size of the rubber sleeve 111, and the clamping rod 113 is clamped by the clamping nut 114 to ensure that the welding wire is fed straightly, thereby reducing the friction between the welding wire and the wire feeding channel 4.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A twin-wire welding gun, comprising a gun body (1), a joint (2) and two conductive nozzles (3) arranged in parallel, characterized in that: The gun body (1) is provided with two wire feeding channels (4) which are distributed in parallel. A spring (5) is arranged in the wire feeding channel (4). The outer sides of the two springs (5) are sleeved with locking rings (6). One end of the conductive nozzle (3) is fixedly connected to a conductive seat (7). One side of the conductive seat (7) is fixedly connected to a conductive rod (8). Both ends of the conductive rod (8) are respectively fixedly connected to the conductive seat (7) and the locking ring (6) through locking nuts (9). An adjusting device (10) is arranged at the connection between the wire feeding channel (4) and the joint (2). The adjusting device (10) comprises a fixed sleeve (101) arranged at the entrance of the wire feeding channel (4). A sliding sleeve (102) is slidably connected to the outer side of the fixed sleeve (101). One side of the sliding sleeve (102) is rotatably connected to the conductive seat (7). There are four rotating rods (103) distributed symmetrically around the center. A slider (104) is provided at one end of the rotating rod (103) away from the sliding sleeve (102). An arc-shaped plate (105) is provided on the side of the slider (104) close to the rotating rod (103). A sliding rod (106) is fixedly connected to the outer side of the sliding sleeve (102). A fixing piece (107) is provided at one end of the sliding rod (106). One end of the sliding rod (106) slides through the joint (2). One end of the sliding rod (106) is engraved with a thread. The fixing piece (107) is a fixing nut matched with the threaded end of the sliding rod (106). The fixing sleeve (101) is in a "funnel" shape. The bottom ends of the four arc-shaped plates (105) are all provided with protrusions (108) along the center of the wire feeding channel (4).

2. A twin-wire welding gun according to claim 1, characterized in that: The wire feeding channel (4) is a three-section wire feeding channel (4) with a large diameter in the middle and small diameters at both ends, and the inner diameter of the spring (5) is larger than the diameters at both ends of the wire feeding channel (4).

3. A twin-wire welding gun according to claim 1, characterized in that: A clamping device (11) is provided at the connection between the wire feeding channel (4) and the conductive nozzle (3), and the clamping device (11) comprises a rubber sleeve (111), a clamping ring (112) is sleeved on the outer side of the rubber sleeve (111), a clamping rod (113) is fixedly connected to the outer side of the clamping ring (112), a thread is engraved on the top end of the clamping rod (113), and a clamping nut (114) adapted to the clamping rod (113) is provided on the outer side of the clamping rod (113).

4. A twin-wire welding gun according to claim 3, characterized in that: The rubber sleeve (111) is in a "funnel" shape, and the diameters of the two ends of the rubber sleeve (111) are respectively matched to the diameters of the wire feeding channel (4).

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