Double-wire double-power-supply CO2 welding gun

Abstract

The utility model relates to a welding gun, in particular to a double-wire double-power CO2 welding gun. The double-wire and double-power-source CO2 welding gun comprises a handle, a shell, a first gun head, a second gun head, wire feeding pipes, a power line, a wire feeding assembly and a rotating assembly, the shell is rotationally connected to the upper end of the handle, the first gun head and the second gun head are symmetrically connected to the right side of the shell, the wire feeding pipes are symmetrically connected into the shell, and the rotating assembly is connected with the power line. The two wire feeding pipes are connected and communicated with the first gun head and the second gun head on the same side respectively, the top of each wire feeding pipe is connected with a power line, a wire feeding assembly is arranged in the shell, and a rotating assembly is arranged on the handle. By arranging the first gun head and the second gun head, the requirement for simultaneous use of two welding wires is met, due to the fact that the two welding wires are molten at the same time, the deposition speed of materials can be remarkably increased, the welding process is accelerated, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a welding gun, in particular to a double-wire double-power CO2 welding gun. Background Art

[0002] In shipbuilding, welding accounts for approximately 30% to 40% of the total construction time, and welding efficiency directly impacts shipbuilding cycle time and cost. In the block manufacturing process, steel plates must first be welded to flat paneling. Thick plate welding typically utilizes multi-layer, multi-pass welding. The quality and efficiency of flat panel welding directly impacts the overall manufacturing quality and cycle time of the entire block. CO2 gas shielded welding is a recognized and highly efficient welding method for steel structural component construction. This arc welding technique uses CO2 as a shielding gas to prevent atmospheric oxygen and nitrogen from adversely affecting the high-temperature weld metal.

[0003] However, single-wire CO2 welding is currently the most widely used method, which has significant limitations. Because it uses only one wire, single-wire CO2 welding typically has a lower deposition rate than twin-wire welding. This means that for materials of the same thickness, single-wire welding may take longer to complete, especially when dealing with thick plates or multiple layers. Furthermore, to achieve sufficient penetration, single-wire welding often requires higher current and voltage settings, which can result in increased heat input into the weld zone, increasing the risk of workpiece deformation and potentially leading to increased residual stresses in the weld joint.

[0004] Based on this, in order to solve the above-mentioned technical defects, a double-wire double-power CO2 welding gun is proposed. Utility Model Content

[0005] In order to overcome the above-mentioned shortcomings, the technical problem of the present invention is to provide a dual-wire dual-power CO2 welding gun.

[0006] The technical solution is as follows: A dual-wire dual-power CO2 welding gun, including a handle, a shell, a gun head 1, a gun head 2, a wire feeding tube, a power cord, a wire feeding assembly and a rotating assembly. The upper end of the handle is rotatably connected to the shell, and the gun head 1 and the gun head 2 are symmetrically connected to the right side of the shell. The wire feeding tubes are symmetrically connected inside the shell. The two wire feeding tubes are respectively connected to the gun head 1 and the gun head 2 on the same side and are communicated with each other. The tops of the wire feeding tubes are connected to the power cord, the wire feeding assembly is provided in the shell, and the rotating assembly is provided on the handle.

[0007] Optionally, the cross-sections of the ports of gun tip 1 and gun tip 2 are different, which is conducive to the use of two welding wires in series or in parallel.

[0008] Optionally, the wire feeding assembly includes a sliding frame, a compression spring, a wire feeding wheel, a support plate, a driving wheel and a power assembly. The sliding frame is symmetrically slidably connected to the outer shell, the wire feeding wheel is rotatably connected to the sliding frame, compression springs are connected between the sliding frame and the inside of the outer shell, a support plate is connected to the middle part of the outer shell, the driving wheel is symmetrically rotatably connected to the support plate, the wire feeding tube is located between the driving wheel and the wire feeding wheel, and a power assembly is provided on the support plate.

[0009] Optionally, the position of the wire feeding tube close to the driving wheel and the wire feeding wheel is open, and the welding wire is fed into the wire feeding tube, and the welding wire contacts the driving wheel and the wire feeding wheel on both sides.

[0010] Optionally, the power assembly includes a motor 1 and a driven gear. The motor 1 is installed at the bottom of the support plate, and the bottom of the driving wheel is connected to the driven gear. The output shaft of the motor 1 passes through the support plate and is connected to the driven gear on the front side.

[0011] Optionally, the rotating assembly includes motor 2, a driving wheel, a fixed wheel and a protective cover. The upper end of the handle near the outer shell is connected to the fixed wheel, and the handle is rotatably connected to the protective cover at the outside of the fixed wheel. Motor 2 is installed on the left side of the upper part of the outer shell, and the driving wheel is connected to the output shaft of motor 2. The driving wheel is located inside the protective cover and engages with the fixed wheel.

[0012] The beneficial effects are: 1. By setting the first and second gun heads, two welding wires can be used at the same time. Since the two welding wires are melted at the same time, the deposition speed of the material can be significantly increased, thereby speeding up the welding process and improving production efficiency;

[0013] 2. Two independent power supply devices are used to control the current and voltage of the two welding wires respectively. By adjusting the current and voltage of the two welding wires, the formation of the weld can be optimized to make it more uniform and beautiful. At the same time, the heat input can be controlled to reduce welding deformation and residual stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0015] Figure 2 It is a partial cross-sectional view of the present utility model.

[0016] Figure 3 It is a three-dimensional structural diagram of the utility model's housing, gun head 1 and gun head 2.

[0017] Figure 4 It is a three-dimensional structural diagram of the sliding frame, compression spring, wire feeding wheel and other components of the utility model.

[0018] Figure 5 It is a plan view of the utility model.

[0019] Figure 6 It is a three-dimensional structural diagram of the motor 2, driving wheel, fixed wheel and other components of the utility model.

[0020] The meanings of the reference numerals in the figure are: 1_handle, 2_housing, 3_gun head one, 4_gun head two, 5_wire feeding tube, 6_power cord, 7_sliding frame, 8_compression spring, 9_wire feeding wheel, 10_support plate, 11_motor one, 12_driving wheel, 13_driven gear, 14_motor two, 15_driving wheel, 16_fixed wheel, 17_protective cover. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that any directional terms such as "up," "down," "left," "right," "front," "back," "inside," and "outside" that appear or will appear in this document are based solely on the accompanying drawings and are not intended to limit the present invention.

[0022] Example: A dual-wire dual-power CO2 welding gun, such as Figures 1-6 As shown, it includes a handle 1, a shell 2, a gun head 1 3, a gun head 2 4, a wire feeding tube 5, a power cord 6, a wire feeding assembly and a rotating assembly. The upper end of the handle 1 is rotatably connected to the shell 2, and the right side of the shell 2 is symmetrically connected to the gun head 1 3 and the gun head 2 4. The port cross-sections of the gun head 1 3 and the gun head 2 4 are different, which is conducive to the use of two welding wires in series or parallel. The shell 2 is symmetrically connected to the wire feeding tube 5, and the two wire feeding tubes 5 are respectively connected to the gun head 1 3 and the gun head 2 4 on the same side and are communicated with each other. The top of the wire feeding tube 5 is connected to the power cord 6, a wire feeding assembly is provided in the shell 2, and a rotating assembly is provided on the handle 1.

[0023] like Figure 2-Figure 5 As shown, the wire feeding assembly includes a sliding frame 7, a compression spring 8, a wire feeding wheel 9, a support plate 10, a motor 11, a driving wheel 12 and a driven gear 13. The sliding frame 7 is symmetrically slidably connected to the housing 2 in the front and rear directions, and the wire feeding wheel 9 is rotatably connected on the sliding frame 7. The compression spring 8 is connected between the sliding frame 7 and the inside of the housing 2. The middle part of the housing 2 is connected with a support plate 10. The driving wheel 12 is symmetrically rotatably connected on the support plate 10. The wire feeding tube 5 is respectively located between the driving wheel 12 and the wire feeding wheel 9. The position of the wire feeding tube 5 near the driving wheel 12 and the wire feeding wheel 9 is open. The welding wire is fed into the wire feeding tube 5, and the welding wire contacts the driving wheels 12 and the wire feeding wheels 9 on both sides. The wire feeding is completed through the driving wheel 12 and the wire feeding wheel 9. A motor 11 is installed at the bottom of the support plate 10 by bolts. The bottom of the driving wheel 12 is connected to the driven gear 13, and the output shaft of the motor 11 passes through the support plate 10 and is connected to the driven gear 13 on the front side.

[0024] like Figure 1 and Figure 6As shown, the rotating assembly includes a motor 2 14, a driving wheel 15, a fixed wheel 16 and a protective cover 17. The fixed wheel 16 is welded to the upper end of the handle 1 near the outer shell 2. The handle 1 is rotatably connected to the protective cover 17 at the outside of the fixed wheel 16. The motor 2 14 is installed on the left side of the upper part of the outer shell 2 by bolts. The driving wheel 15 is connected to the output shaft of the motor 2 14. The driving wheel 15 is located inside the protective cover 17 and engages with the fixed wheel 16.

[0025] When using this device, two independent welding wires are respectively passed through the wire feeding tube 5 into the corresponding gun head 1 3 and gun head 2 4. The two welding wires can be the same or different materials, and each welding wire has its own power cord 6, so that the current and voltage of each welding wire can be independently controlled. When holding the handle 1 for welding, the motor 11 is started, and its output shaft drives the driving wheel 12 to rotate through the two driven gears 13. The driving wheel 12 rubs with the welding wire to drive the welding wire to the right, and the wire feeding wheel 9 on the other side rotates accordingly to assist the movement of the welding wire, and the compression spring 8 acts as a buffer. The effect of the pulse is that when the welding wire contacts the workpiece, the current provided by the power supply forms an arc between the end of the welding wire and the workpiece. The high temperature generated by the arc is sufficient to melt the welding wire and the workpiece surface, forming a molten pool. The melting and transition processes of the two welding wires are independently controlled, and the current and voltage of each can be adjusted as needed to complete the welding operation. After the wire feeding is completed, the motor 11 is turned off. The two welding wires can be used in series or in parallel. When used in series, that is, the welding wires are placed one in front of the other, which is suitable for thick plate root welding; when used in parallel, that is, the welding wires are arranged side by side, which is suitable for filling and cap welding. If the angle of the two welding wires needs to be adjusted, the motor 2 14 can be started. The output shaft of the motor 2 14 rotates and drives the drive wheel 15 to rotate. The drive wheel 15 cooperates with the fixed wheel 16, so that the drive wheel 15 drives the motor 11 and the protective cover 17 to rotate along the fixed wheel 16, thereby driving the entire housing 2 to rotate, adjusting the angle of the gun head 1 3 and the gun head 2 4 to adjust the angle of the two welding wires. After adjustment, the motor 2 14 is turned off. This allows for flexible adjustment according to usage needs.

[0026] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A dual-wire dual-power CO2 welding gun, characterized in that: The invention comprises a handle (1), a shell (2), a gun head 1 (3), a gun head 2 (4), a wire feeding tube (5), a power line (6), a wire feeding assembly and a rotating assembly. The upper end of the handle (1) is rotatably connected to the shell (2). The right side of the shell (2) is symmetrically connected to the gun head 1 (3) and the gun head 2 (4). The inside of the shell (2) is symmetrically connected to the wire feeding tube (5). The two wire feeding tubes (5) are respectively connected to the gun head 1 (3) and the gun head 2 (4) on the same side and communicate with each other. The top of the wire feeding tube (5) is connected to the power line (6). The shell (2) is provided with a wire feeding assembly. The handle (1) is provided with a rotating assembly.

2. A dual-wire dual-power CO2 welding gun according to claim 1, characterized in that: The cross-sections of the ports of the first (3) and second (4) gun heads are different, which is beneficial for the use of two welding wires in series or in parallel.

3. A dual-wire dual-power CO2 welding gun according to claim 2, characterized in that: The wire feeding assembly comprises a sliding frame (7), a compression spring (8), a wire feeding wheel (9), a support plate (10), a driving wheel (12) and a power assembly. The sliding frame (7) is symmetrically slidably connected to the housing (2), the wire feeding wheel (9) is rotatably connected to the sliding frame (7), the compression spring (8) is connected between the sliding frame (7) and the inside of the housing (2), the support plate (10) is connected to the middle part of the housing (2), the driving wheel (12) is symmetrically rotatably connected to the support plate (10), the wire feeding tube (5) is respectively located between the driving wheel (12) and the wire feeding wheel (9), and the support plate (10) is provided with a power assembly.

4. A dual-wire dual-power CO2 welding gun according to claim 3, characterized in that: The position of the wire feeding tube (5) close to the driving wheel (12) and the wire feeding wheel (9) is open, and the welding wire is fed into the wire feeding tube (5), and the welding wire contacts the driving wheel (12) and the wire feeding wheel (9) on both sides.

5. A dual-wire dual-power CO2 welding gun according to claim 4, characterized in that: The power assembly includes a motor (11) and a driven gear (13). The motor (11) is installed at the bottom of the support plate (10), and the bottom of the driving wheel (12) is connected to the driven gear (13). The output shaft of the motor (11) passes through the support plate (10) and is connected to the driven gear (13) on the front side.

6. A dual-wire dual-power CO2 welding gun according to claim 5, characterized in that: The rotating assembly comprises a second motor (14), a driving wheel (15), a fixed wheel (16) and a protective cover (17); the upper end of the handle (1) is connected to the fixed wheel (16) at a position close to the housing (2); the handle (1) is rotatably connected to the protective cover (17) at a position outside the fixed wheel (16); the second motor (14) is installed on the left side of the upper part of the housing (2); the output shaft of the second motor (14) is connected to the driving wheel (15); the driving wheel (15) is located inside the protective cover (17) and meshes with the fixed wheel (16).

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