Device for lengthening solid welding wire

Abstract

A device for lengthening a solid welding wire is provided with a rectangular base, a V-shaped groove is formed in the base in the length direction, a red copper plate is embedded in the base and at the center of the V-shaped groove, the upper surface of the red copper plate and the bottom of the V-shaped groove are located on the same horizontal plane, the welding wire to be connected is located in the V-shaped groove, and the V-shaped groove is matched with a welding wire pressing device. The welding wire pressing device is fixed to the base through a fixing plate, and a pressing ball of the welding wire pressing device presses a welding wire to be connected. And a welding gun is fixed on the base and is supported above the red copper plate through a welding gun bracket. According to the method, the two sections of lengthened welding wires are fused together without being filled with weld metal, the lengthened welding wires have good straightness while it is guaranteed that a lengthened connector is completely fused, it is guaranteed that the lengthened welding wires have good weldability and operability, and the welding quality is improved. The utilization rate of the argon tungsten-arc welding wire can reach more than 99%, and the construction cost is greatly saved.

Description

Technical Field

[0001] The present invention belongs to the field of shipbuilding and design, and particularly relates to a device for extending solid cored wires. Background Art

[0002] The storage tank of a liquefied natural gas carrier (hereinafter referred to as an LNG carrier) is an important storage device for liquefied natural gas transportation. Since LNG is a cryogenic and deep-cooling medium, storage equipment and related equipment and facilities should have reliable cryogenic and deep-cooling resistance performance. In particular, the LNG storage tank should at least meet the requirement of withstanding low temperatures below -162°C, and before the first use, the storage tank should be precooled with liquid nitrogen at -196°C. Therefore, the main body material of the LNG storage tank is 9% Ni steel. 9% Ni steel has good low-temperature toughness, but the main problems that may be encountered during the welding process are poor low-temperature toughness of the welded joint, welding cracks, arc magnetic blowout, etc. Through a large number of welding process tests, shielded metal arc welding and tungsten inert gas welding can be used to weld the main body of the tank. Due to special welding positions and construction process requirements, tungsten inert gas welding needs to be used for welding the root pass weld. Each length of the wire for tungsten inert gas welding is 1000 mm, and the last 100 mm of the wire cannot be used during the welding process, resulting in a large amount of welding material waste. Since the welding materials for 9% Ni steel are very expensive, in order to save construction costs, there is an urgent need to invent a device for extending the wire to improve the utilization rate of welding materials. Summary of the Invention

[0003] To solve the above problems, the present invention provides a device for extending solid cored wires, aiming to achieve the purpose of connecting the last 100 mm of the wire to a new wire during the welding process to avoid a large amount of wire waste. The technical solution adopted is as follows:

[0004] A device for extending solid cored wires has a rectangular base, with a V-shaped groove opened along the length direction of the base. At the center of the base and the V-shaped groove, a copper plate is embedded. The upper surface of the copper plate is at the same horizontal plane as the bottom of the V-shaped groove, and the V-shaped groove is fitted with a wire pressing device.

[0005] The wire pressing device consists of a fixing plate, a fixing shaft, a pressing ball, and a tension spring. The fixing plate is vertically fixed on the base. The fixing shaft is arranged at the upper part of the fixing plate. The pressing ball is provided with a ball rod, one end of the ball rod is fixed with a ball, the ball presses on the V-shaped groove, and the other end of the ball rod is rotatably connected to the fixing shaft. There are two pressing balls, and the ball rods of the two pressing balls form an angle, and a tension spring is fixed between the ball rods of the two pressing balls.

[0006] A welding torch is fixed on the base, and the welding torch is supported above the copper plate through a welding torch bracket.

[0007] The above-mentioned device for extending the length of solid wire electrodes, further, the depth of the groove is 2 mm, and the angle of the V-shaped groove is 90°.

[0008] The above-mentioned device for extending the length of solid wire electrodes, further, the fixing plate is made of a stainless steel plate with a thickness of not less than 5 mm.

[0009] The above-mentioned device for extending the length of solid wire electrodes, further, the ball and the ball rod are connected by bolts.

[0010] The above-mentioned device for extending the length of solid wire electrodes, further, the welding torch is an argon arc welding torch.

[0011] The above-mentioned device for extending the length of solid wire electrodes, further, the copper plate is a square with a side length of 50 mm.

[0012] In the present invention, the two wire electrodes to be extended are fused together by not filling the weld metal. While ensuring that the extended joint of the wire electrode is completely melted, the extended wire electrode also has good straightness, ensuring that the extended wire electrode has good weldability and operability, enabling the utilization rate of tungsten argon arc welding wire to reach more than 99%, greatly saving the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic side view structure diagram of the present invention;

[0014] Figure 2 is a schematic top view structure diagram of the present invention;

[0015] Wherein, 1 - base, 2 - V-shaped groove, 3 - copper plate, 4 - welding torch support, 5 - fixing plate, 6 - fixed shaft, 7 - tension spring, 8 - solid wire electrode to be extended, 9 - ball, 10 - ball rod. DETAILED DESCRIPTION OF THE INVENTION

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] As Figure 1 , 2 shown, a device for extending the length of solid wire electrodes has a rectangular base, with a V-shaped groove opened along the length direction of the base. At the center of the base and in the V-shaped groove, a copper plate is embedded. The upper surface of the copper plate and the bottom of the V-shaped groove are on the same horizontal plane. The V-shaped groove is equipped with a wire electrode pressing device. The depth of the groove is 2 mm, and the angle of the V-shaped groove is 90°. A set of wire electrode pressing devices is installed symmetrically on the left and right sides of the copper plate.

[0018] The wire pressing device consists of a fixed plate, a fixed shaft, pressing balls, and a tension spring. The fixed plate is vertically fixed on the base, the fixed shaft is arranged at the upper part of the fixed plate, the pressing balls are provided with ball rods, one end of the ball rod is fixed with a ball, the ball presses on the V-shaped groove, the other end of the ball rod is rotatably connected to the fixed shaft, there are two pressing balls, the ball rods of the two pressing balls form an angle, and a tension spring is fixed between the ball rods of the two pressing balls.

[0019] A welding torch is fixed on the base, and the welding torch is supported above the copper plate through a welding torch bracket.

[0020] The two sections of solid core wires to be lengthened are placed in the V-shaped groove, the interface is located on the copper plate, and after the welding torch is clamped and fixed, the connection can be carried out. Welding is carried out in a way that does not fill the weld metal. It mainly melts the two sections of wires to be lengthened through the arc, so that the lengthened welding joint self-fuses, and finally the lengthening of the wire is realized.

Claims

1. A device for extending a solid wire electrode, characterized in that, There is a rectangular base (1), with a V-shaped groove (2) opened along the length direction of the base. At the center of the base and on the V-shaped groove, a copper plate (3) is embedded. The upper surface of the copper plate is at the same horizontal plane as the bottom of the V-shaped groove. The V-shaped groove is equipped with a wire welding rod pressing device. The wire welding rod pressing device consists of a fixed plate (5), a fixed shaft (6), pressing balls, and a tension spring (7). The fixed plate is vertically fixed on the base. The fixed shaft is arranged at the upper part of the fixed plate. The pressing balls are provided with ball rods (10). One end of the ball rod is fixed with a ball (9), and the ball presses on the V-shaped groove. The other end of the ball rod is rotatably connected to the fixed shaft. There are two pressing balls, and the ball rods of the two pressing balls form an angle. A tension spring is fixed between the ball rods of the two pressing balls. A welding torch is fixed on the base, and the welding torch is supported above the copper plate through a welding torch bracket (4).

2. The device for joining solid wire elongation according to claim 1, characterized in that, The depth of the groove is 2 mm, and the angle of the V-shaped groove is 90°.

3. The device for extending a solid wire according to claim 1, characterized in that, The fixed plate is made of a stainless steel plate with a thickness of not less than 5 mm.

4. A device for lengthening a solid wire electrode according to claim 1, characterized in that, The ball and the ball rod are connected by bolts.

5. A device for extending a solid wire according to claim 1, characterized in that, The welding torch adopts a TIG welding torch.

6. The device for butt welding of solid wires according to claim 1, characterized in that, The copper plate is a square with a side length of 50 mm.

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