High-frequency pipe welding device

Abstract

The utility model discloses a high-frequency pipe welding device and belongs to the technical field of welded pipes. The high-frequency pipe welding device comprises a rack, a rolling forming mechanism, a steel pipe conveying system, an induction coil, an impedor, a welding pressure roller, a cooling system and a control system. The induction coil is arranged at the rear end of the rolling forming mechanism and is annular, an impedor is arranged in the induction coil, and the position of the impedor can be adjusted in the axial direction of the steel pipe in the steel pipe; the welding pressure roller is located behind the induction coil and used for applying pressure to the edge of the heated steel pipe, and the cooling system is located behind the welding pressure roller. By means of the annular induction coil and the impedor arranged in the annular induction coil, the rapid and uniform heating of the edge of the steel pipe and the axial adjusting function of the impedor are achieved, welding parameters can be optimized according to different steel pipe specifications, and the welding adaptability is improved.

Description

Technical Field

[0001] This utility model belongs to the field of welded pipe technology, and specifically relates to a high-frequency pipe welding device. Background Technology

[0002] In the automotive manufacturing industry, steel pipes are widely used in vehicle structural components and exhaust systems due to their high strength, light weight, and cost-effectiveness. With increasing demands for lightweight vehicles and energy conservation and emission reduction, the requirements for the welding quality of steel pipes are becoming increasingly stringent. Traditional welding techniques, such as arc welding and flash welding, while meeting the needs of the automotive industry to some extent, suffer from problems such as low efficiency, unstable weld quality, and large heat-affected zones. These issues can lead to a decline in the mechanical properties of the weld area, affecting the safety and durability of automotive components.

[0003] High-frequency tube welding technology, with its rapid heating and precise control of welding temperature and pressure, is gradually becoming the preferred method for steel tube welding in the automotive industry. This technology rapidly heats the edges of the steel tube using an electromagnetic field generated by a high-frequency current, achieving precise fusion, thereby reducing welding deformation and the heat-affected zone, and improving the quality and consistency of the weld joint. However, existing high-frequency tube welding devices typically use induction coils and impedance devices to generate the electromagnetic field during the welding process. However, the impedance devices are usually fixed in position, resulting in uneven heating for steel tubes of different lengths, affecting weld quality. Especially in automotive exhaust system manufacturing, the welding quality of the steel tubes directly affects the system's sealing and corrosion resistance. Therefore, developing an efficient, stable, and highly automated high-frequency tube welding device is crucial for improving automotive manufacturing processes. This invention aims to address the shortcomings of existing technologies and provide a high-quality steel tube welding solution suitable for the automotive industry. Summary of the Invention

[0004] To address the aforementioned problems, this utility model discloses a high-frequency pipe welding device with a simple structure. This device achieves efficient and uniform welding of steel pipes through the design of an induction coil, an adjustable impedance device, a welding pressure roller, and an external cooling system.

[0005] To achieve the above objectives, the specific technical solution of this application is as follows:

[0006] A high-frequency tube welding apparatus includes a frame, a roll forming mechanism, a steel pipe conveying system, an induction coil, an impedance device, a welding pressure roller, a cooling system, and a control system. The induction coil is located at the rear end of the roll forming mechanism and is annular. An impedance device is provided inside the induction coil and is located inside the steel pipe. The position of the impedance device can be adjusted along the axial direction of the steel pipe. The welding pressure roller is located after the induction coil and is used to apply pressure to the edge of the heated steel pipe. The cooling system is located after the welding pressure roller.

[0007] Based on the above technical features, preferably, the impedance is made of a magnetically conductive material, and the axial adjustment is driven by a lead screw or gear, and the axial position adjustment of the impedance is realized through manual or automatic control.

[0008] Based on the above technical features, preferably, the cooling system is a water-cooled or air-cooled device, used to quickly and uniformly cool the welded steel pipe, which helps to improve production efficiency and ensure the quality of the steel pipe.

[0009] Based on the above technical features, preferably, the impedance includes a magnetic rod with a rectangular cross-section.

[0010] Based on the above technical features, the welding pressure roller further includes one or more pairs of rollers, and at least one side of the roller can be adjusted to accommodate steel pipes of different sizes.

[0011] Based on the above technical features, the high-frequency tube welding device further includes a detection device, which includes a temperature detector, a pressure detector, a size detector, and a weld quality detector. These detectors are located at different positions throughout the system. The placement of these detectors helps to monitor key parameters of the welding process and ensures welding quality and product consistency.

[0012] Compared with the prior art, the beneficial effects of this application are as follows:

[0013] 1. The application utilizes a ring-shaped induction coil and an internally installed impedance device to achieve rapid and uniform heating of the steel pipe edge. The axial adjustment function of the impedance device allows welding parameters to be optimized according to different steel pipe specifications, thus improving the adaptability of welding.

[0014] 2. The cooling system of water-cooling or air-cooling device ensures rapid and uniform cooling of the welded steel pipe, thereby improving production efficiency;

[0015] 3. The adjustable design of the welding pressure rollers allows the device to adapt to steel pipes of different sizes, increasing the flexibility of the equipment;

[0016] 4. Equipped with temperature, pressure, dimensional and weld quality detection devices, the welding process is monitored in real time, ensuring the stability of welding quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a high-frequency tube welding device according to the present invention;

[0018] Figure 2 This is a schematic diagram of a partial cross-section;

[0019] List of identifiers in attached diagrams:

[0020] 1. Frame; 2. Roll forming mechanism; 3. Steel pipe conveying system; 4. Induction coil; 5. Impedance device; 6. Lead screw; 7. Welding pressure roller; 8. Cooling system; 9. Steel pipe. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0022] It should be noted that the terms "upper," "lower," "left," "right," "front," and "rear" used in the following description refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 As shown, a high-frequency pipe welding device includes a frame 1, which supports all components of the welding device; a roll forming mechanism 2, which rolls steel strip into the desired steel pipe shape; and a steel pipe conveying system 3, which conveys the steel coil from the roll forming mechanism to the welding area. The system typically includes a drive device and a guide device, whereby the drive device controls the forward speed of the steel pipe and the guide device ensures the steel pipe maintains the correct orientation during conveying. It also includes an induction coil 4, which has adjustable current and frequency outputs to adapt to the welding requirements of steel pipes of different materials and thicknesses; and an impedance device 5, whose main component is a magnetic core, which increases the inductive reactance of the pipe surface to reduce ineffective current and improve welding speed. Welding efficiency can be improved by replacing the original circular magnetic rod with a rectangular magnetic rod with better performance and a larger cross-section. Simultaneously, the magnetic core of the impedance device uses ferrite, requiring its Curie temperature to be no less than 310°C. A higher Curie temperature allows it to be closer to the weld seam, resulting in higher welding efficiency. The device also includes a welding pressure roller 7 and a cooling system 8 to control the system. The induction coil 4 is located at the rear end of the roll forming mechanism 2 and is annular. An impedance device 5 is provided inside the induction coil 4, near the opening of the steel pipe. The position of the impedance device 5 can be adjusted along the axial direction of the steel pipe. The welding pressure roller 7 is located after the induction coil 4 and is fixed on the frame 1. It is used to apply pressure to the edge of the heated steel pipe. The cooling system is located after the welding pressure roller.

[0024] Preferably, the impedance 5 is made of a magnetically conductive material, and the axial adjustment is driven by a lead screw or gear, and the axial position adjustment of the impedance is achieved through manual or automatic control.

[0025] Preferably, the cooling system is a water-cooled or air-cooled device, used to rapidly and uniformly cool the welded steel pipe, which helps to improve production efficiency and ensure the quality of the steel pipe.

[0026] Furthermore, the welding pressure roller includes one or more pairs of rollers, and at least one side of the roller is adjustable to accommodate steel pipes of different sizes.

[0027] Furthermore, the high-frequency tube welding device also includes a detection device, which includes a temperature detector, a pressure detector, a size detector, and a weld quality detector. These detectors are located at different positions throughout the system. The placement of these detectors helps to monitor key parameters of the welding process, ensuring welding quality and product consistency.

[0028] Workflow:

[0029] Steel pipe forming: Steel strips are rolled into steel pipe shapes by a roll forming mechanism.

[0030] Induction heating: The steel pipe is heated by the magnetic field generated by the high-frequency current through the induction coil.

[0031] Impedance adjustment: Adjust the axial position of the impedance device according to the specifications of the steel pipe by means of a screw or gear drive mechanism to optimize the heating effect.

[0032] Welding: The edges of the heated steel pipe are pressed by welding pressure rollers to achieve welding.

[0033] Cooling: The welded steel pipe is cooled quickly and evenly through a cooling system.

[0034] Throughout the welding process, the detection device monitors temperature, pressure, dimensions, and weld quality in real time to ensure welding quality.

[0035] The control system automatically adjusts welding parameters based on feedback from the detection device to ensure the stability of the welding process and the quality of the weld.

[0036] It should be noted that the accompanying drawings merely illustrate the technical concept of the present invention and should not be used to limit the scope of protection of the present invention. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A high-frequency tube welding device, characterized in that: The system includes a frame, a roll forming mechanism, a steel pipe conveying system, an induction coil, an impedance device, a welding pressure roller, a cooling system, and a control system. The induction coil is located at the rear end of the roll forming mechanism and is annular. An impedance device is installed inside the induction coil and is located inside the steel pipe. The position of the impedance device can be adjusted along the axial direction of the steel pipe. The welding pressure roller is located after the induction coil and is used to apply pressure to the edge of the heated steel pipe. The cooling system is located after the welding pressure roller.

2. The high-frequency tube welding device according to claim 1, characterized in that: The impedance is made of magnetic material, and the axial adjustment is driven by a lead screw or gear. The axial position of the impedance can be adjusted manually or automatically.

3. The high-frequency tube welding device according to claim 1, characterized in that: The cooling system is a water-cooled or air-cooled device used to rapidly and uniformly cool the welded steel pipe.

4. The high-frequency tube welding device according to claim 1, characterized in that: The impedance device includes a magnetic rod with a rectangular cross-section.

5. The high-frequency tube welding device according to claim 1, characterized in that: The welding pressure roller includes one or more pairs of rollers, and at least one side of the roller is adjustable to accommodate steel pipes of different sizes.

6. The high-frequency tube welding device according to claim 1, characterized in that: The high-frequency tube welding device also includes a detection device, which includes a temperature detector, a pressure detector, a size detector, and a weld quality detector.

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