A magnetic control device for a welding torch

Abstract

The utility model discloses a kind of welding torch magnetic control device, including fixed support, there is passageway in fixed support, passageway is used to accommodate welding torch head;Protective gas inlet, protective gas inlet is set to the surface of fixed support, and protective gas outlet is set in passageway, protective gas inlet is communicated with protective gas outlet;Electromagnetic coil, electromagnetic coil ring is set in the outside of passageway of fixed support, and electromagnetic coil is electrically connected with control circuit board, control circuit board is used to control the current size and direction of electromagnetic coil.The utility model in the process of welding torch work, control circuit board will be detected by the detection unit electrically connected therewith, for example, hall sensor detects arc direction, and then by controlling the current size and direction of electromagnetic coil, and then control the strength and direction of magnetism, correct for arc deviation.Simultaneously compared with permanent magnet, demagnetization problem can be effectively avoided, and adjustability is stronger, and then improve applicability.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and specifically to a magnetic control device for a welding torch. Background Technology

[0002] AC stud welding is a commonly used welding process in industry. Its principle is to use a high instantaneous current to generate an electric arc that melts the stud and the base material. However, there are two major interfering factors in the welding process: first, the high instantaneous current generates a strong magnetic field; second, the flow of superheated air and shielding gas impacts the electric arc. Both of these factors together cause the arc to deviate along the stud axis, i.e., arc blow, which ultimately results in one-sided melting of the stud and stud misalignment after welding. This seriously affects the welding quality and pass rate, and may even prevent the welding process from proceeding normally.

[0003] Currently, the industry's solution for arc blow is to install high-strength permanent magnets on the welding torch tip to suppress blow by increasing the local magnetic flux density. However, the magnet's magnetism naturally weakens over time, and the correction effect decreases significantly after long-term use, requiring frequent magnet replacement and increasing operating costs. Utility Model Content

[0004] The purpose of this utility model is to provide a magnetic control device for welding torches in order to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution: A welding torch magnetic control device, comprising: A fixed bracket having a channel for accommodating a welding torch head; A protective gas inlet is provided on the surface of the fixed bracket, and a protective gas outlet is provided in the channel, with the protective gas inlet and the protective gas outlet connected in communication. An electromagnetic coil is arranged around the outside of the channel of the fixed bracket, and the electromagnetic coil is electrically connected to a control circuit board, which is used to control the magnitude and direction of the current in the electromagnetic coil.

[0006] In one embodiment, a buffer rubber ring is provided at the end of the channel of the fixed bracket.

[0007] In one embodiment, a plurality of support rods are provided on one side of the fixed bracket, and the support rods are fixedly connected to the welding gun.

[0008] In one embodiment, six protective gas outlets are provided, and the six protective gas outlets are evenly distributed on the inner wall of the channel.

[0009] In one embodiment, a Hall sensor is disposed inside the fixed bracket, and the Hall sensor is electrically connected to the control circuit board.

[0010] In one embodiment, there is a gap between the welding torch head and the fixed bracket.

[0011] In one embodiment, there are two protective gas inlets, and the protective gas inlets are connected to an external gas supply device via connectors.

[0012] In one embodiment, the control circuit board is disposed between the fixing bracket and the buffer rubber ring.

[0013] The beneficial effects of this utility model are as follows: In this invention, during the welding torch's operation, the control circuit board detects the arc deflection direction via a detection unit electrically connected to it, such as a Hall sensor. Then, by controlling the magnitude and direction of the current in the electromagnetic coil, it controls the strength and direction of the magnetism, thus correcting the arc deflection. Compared to permanent magnets, this effectively avoids demagnetization and offers greater adjustability, thereby improving its applicability.

[0014] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the magnetic control device of this utility model; Figure 2 This is a schematic diagram of the magnetic control device of this utility model in conjunction with the welding torch.

[0016] Reference numerals in the attached diagram: 1. Fixed bracket; 2. Channel; 3. Welding torch head; 4. Welding torch; 5. Shielding gas inlet; 6. Shielding gas outlet; 7. Electromagnetic coil; 8. Control circuit board; 9. Buffer rubber ring; 10. Support rod. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0018] like Figures 1-2 As shown, in one embodiment, a welding torch 4 magnetic control device includes: A fixed bracket 1 has a channel 2 inside, which is used to accommodate the welding gun head 3. The fixed bracket 1 serves as the supporting unit of the entire device. It can be fitted onto the welding gun head 3 through the internal channel 2, and can also serve as the mounting base for other components such as electromagnetic coil 7 and control circuit board 8.

[0019] A protective gas inlet 5 is provided on the surface of the fixed bracket 1, and a protective gas outlet 6 is provided in the channel 2. The protective gas inlet 5 and the protective gas outlet 6 are connected. After the protective gas enters through the protective gas inlet 5, it is then introduced into the channel 2 through the protective gas outlet 6 to protect the weld. An electromagnetic coil 7 is arranged around the outside of the channel 2 of the fixed bracket 1, and the electromagnetic coil 7 is electrically connected to a control circuit board 8, which is used to control the magnitude and direction of the current in the electromagnetic coil 7.

[0020] Through the above technical solution, during the operation of the welding torch 4, the control circuit board 8 detects the arc deflection direction through a detection unit electrically connected to it, such as a Hall sensor. Then, by controlling the magnitude and direction of the current in the electromagnetic coil 7, it controls the strength and direction of the magnetism to correct the arc deflection. At the same time, compared with permanent magnets, it can effectively avoid the problem of demagnetization, and has greater adjustability, thereby improving applicability.

[0021] In one embodiment, a buffer rubber ring 9 is provided at the end of the channel 2 of the fixed bracket 1. The buffer rubber ring 9 has a structure that can be folded axially. When the welding torch 4 is working, the entire welding torch 4 is moved to the stud welding position. At this time, the buffer rubber ring 9 is compressed, forming a sealed space between the welding torch 4 and the welding position, such as the stud or plate. Shielding gas can then be introduced into this sealed space to improve the welding quality. At the same time, there is a gap between the welding torch head 3 and the fixed bracket 1. When shielding gas is introduced, air can be discharged from the gap, thus ensuring that the sealed space is filled with shielding gas.

[0022] In one embodiment, a plurality of support rods 10 are provided on one side of the fixed bracket 1. The support rods 10 are fixedly connected to the welding torch 4. The fixed bracket 1 can be installed on the welding torch 4 through the support rods 10, thereby further reinforcing the fixed bracket 1. The number of support rods 10 can be set to two, three, etc., depending on specific needs.

[0023] In one embodiment, six protective gas outlets 6 are provided, and the six protective gas outlets 6 are evenly distributed on the inner wall of the channel 2. When the gas is discharged from the protective gas outlets 6, the gas distribution is more uniform, which can effectively improve the protective effect and thus effectively improve the welding quality. In other embodiments, the protective gas outlets 6 can be provided in other numbers, such as five, seven, or eight, which can be set according to specific needs.

[0024] In one embodiment, a Hall sensor is installed inside the fixed bracket 1. The Hall sensor is electrically connected to the control circuit board 8. By setting the Hall sensor, it is possible to detect whether arcing occurs. The specific principle is a mature existing technology and will not be elaborated here.

[0025] In one embodiment, two protective gas inlets 5 are provided, and the protective gas inlets 5 are connected to an external gas supply device through a connector. By providing two protective gas inlets, the efficiency of gas intake can be effectively improved, the uniformity of gas intake can be effectively improved, and the uniformity of gas output can also be improved to a certain extent.

[0026] In one embodiment, the control circuit board 8 is disposed between the fixing bracket 1 and the buffer rubber ring 9. A protective housing may be provided on the outside of the control circuit board 8 to protect the control circuit board 8, which will not be described in detail here.

[0027] Working principle: When the welding torch 4 is in operation, the entire torch 4 is moved to the stud welding position; the buffer ring 9 is compressed to form a seal between the welding torch 4 and the plate; the shielding gas is turned on and flows through the mounting bracket 1 to the front end of the welding head; under the pressure of the shielding gas, the air in the channel 2 is discharged from the gap between the mounting bracket 1 and the welding torch 4, ensuring that the channel 2 is filled with shielding gas; during stud welding, the arc deflection direction is detected, and the strength and direction of the magnetic coil are adjusted to correct the arc deflection. After welding is completed, the shielding gas is turned off, the electromagnetic system is shut down, and the welding torch 4 is retracted.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A welding gun magnet control device, characterized by, include: A fixed bracket having a channel for accommodating a welding torch head; A protective gas inlet is provided on the surface of the fixed bracket, and a protective gas outlet is provided in the channel, with the protective gas inlet and the protective gas outlet connected in communication. An electromagnetic coil is arranged around the outside of the channel of the fixed bracket, and the electromagnetic coil is electrically connected to a control circuit board, which is used to control the magnitude and direction of the current in the electromagnetic coil.

2. The welding gun magnet control device of claim 1, wherein, The end of the channel of the fixed bracket is provided with a buffer rubber ring.

3. The welding gun magnet control device of claim 1, wherein, The fixed bracket has multiple support rods on one side, and the support rods are fixedly connected to the welding gun.

4. The welding gun magnet control device of claim 1, wherein, The protective gas outlet is provided with six outlets, and the six protective gas outlets are evenly distributed on the inner wall of the channel.

5. The welding gun magnetostat device of claim 1, wherein, A Hall sensor is installed inside the fixed bracket, and the Hall sensor is electrically connected to the control circuit board.

6. The welding gun magnetostat device of claim 1, wherein, There is a gap between the welding torch head and the fixed bracket.

7. The welding gun magnetostat device of claim 1, wherein, The protective gas inlet is provided in two places, and the protective gas inlet is connected to an external gas supply device through a connector.

8. The welding gun magnetostat device of claim 1, wherein, The control circuit board is positioned between the fixed bracket and the buffer rubber ring.

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