Gas shielded electric welder

Abstract

The utility model discloses a kind of gas protection electric welding machine, including welding machine main body, welding torch, gas supply assembly and hot sleeve pipe, gas supply module is equipped in welding machine main body, gas supply module is communicated with air distribution box by adjusting knob, air distribution box connects gas compensation module, gas compensation module is equipped with flow guide cap, fixed flow guide vane and piezoelectric ware, piezoelectric ware connects vibrating fan blade;Hot sleeve pipe is sleeved in the outside of welding torch, and is fixedly connected by air guide ring, air guide ring surface is provided with multiple exhaust holes.The utility model drives vibrating fan blade to form dynamic air supply by piezoelectric ware, and realizes airflow shaping in combination with fixed flow guide vane, simultaneously, preheating is carried out to protective gas using welding torch waste heat, enhances welding area gas covering stability, improves arc combustion consistency and weld forming quality, with the advantages, such as uniform gas delivery, fast response, good protection effect, applicable to various welding conditions.

Description

Technical Field

[0001] This utility model relates to the field of electric welding machine technology, specifically a gas-shielded electric welding machine. Background Technology

[0002] Gas shielded welding machines are a type of conventional equipment widely used in metal welding and processing. They primarily work by injecting shielding gas into the welding area to isolate harmful components such as oxygen and nitrogen from the molten pool, ensuring welding quality and weld formation stability. Common gas shielded welding methods include gas metal arc welding (MAG welding), gas metal arc welding (MIG welding), and argon arc welding (TIG welding), among which MIG / MAG welding machines are the most widely used in industrial production.

[0003] Most existing gas-shielded welding machines use gas cylinders as an external gas source. The gas supply is regulated by a pressure reducing valve and a flow meter, and the gas is delivered to the nozzle at the front of the welding torch via a gas guide tube. The gas is then ejected from openings around the nozzle, forming a protective airflow around the welding area. Some welding torches have internal air ducts or metal nozzles, allowing gas to be ejected through directional channels for gas guidance and molten pool protection. However, in practical applications, the following prominent problems still exist: Insufficient gas flow stability: The gas delivery of traditional gas shielded welding machines mainly relies on external gas pressure. The gas flow is easily affected by welding environment disturbances (such as high workpiece temperature, welding wire movement, operator hand displacement, etc.), resulting in uneven distribution of shielding gas. This can easily lead to gas flow disorder, back suction or leakage of shielding, thus causing welding defects such as porosity, slag inclusion, uneven penetration, etc.

[0004] Lack of dynamic airflow compensation function: When the gas pressure in the welding area changes or the thermal disturbance intensifies, the existing gas protection system is difficult to achieve real-time compensation and cannot flexibly adjust the gas supply mode according to the dynamic changes in the welding area, resulting in the welding quality being greatly affected by environmental fluctuations.

[0005] Without considering the gas preheating mechanism, the direct ejection of low-temperature gas affects the thermal balance of the welding zone: due to the high temperature in the welding zone, the entry of low-temperature gas can easily cause fluctuations in the temperature of the molten pool, affecting the stability of arc combustion and the continuity of weld formation.

[0006] In summary, the existing technology lacks a compact piezoelectric air supply component with airflow shaping and dynamic compensation functions, as well as an integrated gas protection device that can synergistically achieve gas guidance, heating and stable output. Utility Model Content

[0007] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0008] Therefore, the technical solution adopted by this utility model is as follows: a gas-shielded welding machine, comprising: a welding machine body, a welding torch, a gas supply assembly, and a heat pipe disposed outside the welding torch. The welding machine body has a gas supply module inside, with an adjustment knob connected to its output end. The adjustment knob is connected to an external gas distribution box. A gas compensation module is connected to the front end of the gas distribution box. The gas compensation module contains a piezoelectric element, a flow guide cap, and a fixed flow guide vane. The piezoelectric element is connected to a vibrating fan blade. The heat pipe is fixed to the outside of the welding torch via a gas guide ring, which has several exhaust holes. Through this overall structure, multi-level control, dynamic air supply, and flow guidance of the shielding gas are achieved during the welding process, improving the stability of the welding environment and the protection effect of the molten pool.

[0009] In a preferred example, the welding machine body is further configured such that an air supply module is provided inside the welding machine body. The air supply module is connected to the air distribution box through an adjustment knob. The adjustment knob is a composite control structure, including a resistance control switch and an iris valve, for precisely controlling the airflow pressure and flow rate.

[0010] The specific technical effect is that by linking flow rate and voltage, the controllability of gas output is improved, meeting the welding needs of different working conditions.

[0011] In a preferred embodiment, the gas supply assembly is further configured as follows: the gas distribution box includes a gas distribution box and a gas compensation module. The gas distribution box is located outside the welding torch and is used to collect and distribute gas. The gas compensation module is equipped with a flow guide cap, a fixed flow guide vane and a piezoelectric device. The piezoelectric device drives the vibrating fan blades to form a pulsating airflow.

[0012] The specific technical effects are: using piezoelectrically driven vibrating fan blades to achieve dynamic airflow compensation, improve air supply stability, and enhance the gas encapsulation effect in the molten pool area.

[0013] In a preferred example, the fixed guide vane and the vibrating fan blade are arranged in the same direction inside the guide cap and in a spiral guiding layout to guide the airflow delivered by the vibration to form an annular spiral state.

[0014] The specific technical effect is to ensure that the shielding gas is stably and evenly distributed around the welding wire outlet, suppress gas disturbance and back diffusion, and improve gas utilization.

[0015] In a preferred embodiment, the heating sleeve is fitted over the outside of the welding torch and fixedly connected to it via a gas guide ring. The surface of the gas guide ring is uniformly provided with multiple exhaust holes, and the protective gas is discharged through the gas guide ring to form a ring-shaped protective gas curtain.

[0016] The specific technical effects are: to build a stable gas film, effectively isolate impurities such as oxygen and nitrogen from entering the molten pool area, and reduce welding defects.

[0017] In a preferred embodiment, the gas is further configured such that an annular gas guide cavity is formed within the heat jacket structure, and during the welding process, the gas is heated by the heat from the surface of the welding torch within the heat jacket before being ejected.

[0018] The specific technical effects are: to preheat the gas, avoid the cold gas from causing temperature disturbances to the molten pool, and improve the stability of the electric arc.

[0019] In a preferred embodiment, the vibrating fan blades are preferably multi-bladed symmetrical structures and connected to the output of a piezoelectric device. The piezoelectric device is composed of a piezoelectric ceramic layer and an elastic metal substrate, and vibrates periodically in response to an AC signal controlled by an adjustment knob.

[0020] The specific technical effect is to improve the dynamic air supply and kinetic energy of the gas main artery, thereby enhancing the dynamic gas pressure adaptability of welding.

[0021] In summary, this invention, by integrating a multi-stage gas delivery system with piezoelectric drive, airflow guidance, and heat pretreatment functions onto the outside of the welding torch, not only achieves precise control over gas flow rate, direction, and temperature, but also possesses real-time dynamic compensation capabilities, maintaining excellent gas protection performance even in complex welding environments. This device has a compact structure and high functional integration, and can be widely applied to welding operations of various materials such as carbon steel, stainless steel, and non-ferrous metals, demonstrating good industrial practical value and promising prospects for widespread application.

[0022] The beneficial effects achieved by this utility model are as follows: 1. In this invention, by incorporating a piezoelectric element and vibrating fan blades, forced airflow and dynamic compensation of the protective gas are achieved, ensuring a stable airflow throughout the welding process. This significantly improves the uniformity of gas coverage and arc combustion stability in the welding area, reducing welding defects such as porosity and slag inclusions caused by turbulent airflow. A heating sleeve surrounds the welding torch, forming an independent gas channel. The high temperature on the torch surface further preheats the gas, enhancing its protective activity and gas film stability, thereby improving welding quality and adaptability.

[0023] 2. In this utility model, the fixed guide vanes and guide caps set in the gas compensation module work together to form a spiral guide with the vibrating airflow, so that the protective gas is rectified and guided before being ejected, effectively suppressing gas escape and disturbance, and improving the local sealing of the protected area and the airflow control accuracy.

[0024] In summary, this utility model has a reasonable structural design and strong functional coordination. It possesses composite characteristics such as dynamic air supply, spiral guidance, airflow preheating, and multi-level regulation, which significantly improves the response efficiency and control accuracy of the gas protection system during welding. It has good industrial application value and promotion prospects. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the surface structure of a welding torch according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the gas compensation module and the heat jacket according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of an air compensation module according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the guide vane, piezoelectric element, and flexible fan blade structure according to an embodiment of the present invention.

[0026] Figure label: 100. Welding machine body; 110. Gas supply module; 120. Welding torch; 111. Adjustment knob; 200. Air supply assembly; 210. Air distribution box; 220. Air compensation module; 221. Flow deflector cap; 222. Fixed flow deflector; 223. Piezoelectric element; 224. Vibrating fan blade; 300. Heat sleeve; 310. Air guide ring; 311. Exhaust port. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0028] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0029] The following describes, with reference to the accompanying drawings, some embodiments of a gas-shielded welding machine provided by this utility model.

[0030] Combination Figures 1-5 As shown, the present invention provides a gas-shielded welding machine, including a welding machine body 100, a welding torch 120, a gas supply assembly 200, and a heat pipe 300 sleeved on the outside of the welding torch 120. The welding machine body 100 contains a gas supply module 110, which is a gas pump structure used to provide the shielding gas required for welding.

[0031] The output end of the gas supply module 110 is connected to an adjustment knob 111. The adjustment knob 111 includes a resistance control switch and an iris valve. The iris valve is used to adjust the airflow at the connection between the gas supply module 110 and the gas distribution box 210. The output end of the resistance control switch is electrically connected to the end of the piezoelectric device 223 to control the working power of the piezoelectric device 223. The adjustment knob 111 is used to regulate the gas flow and pressure. The output end of the adjustment knob 111 is connected to the gas distribution box 210 through a gas pipe. The gas distribution box 210, as part of the gas supply assembly 200, is located outside the welding torch 120, and its front end is connected to a gas compensation module 220. The gas passes sequentially from the gas supply module 110 through the adjustment knob 111, the gas distribution box 210, and the gas compensation module 220, and is finally guided by the gas guide ring 310 into the front end area of ​​the welding torch 120 for protective ejection.

[0032] Furthermore, the gas compensation module 220 includes a flow guide cap 221, which is a hollow shell structure with several fixed flow guide vanes 222 inside, used to initially guide and shape the incoming airflow, thereby improving gas stability and directionality.

[0033] A piezoelectric element 223 is also fixedly installed inside the air guide cap 221. The piezoelectric element 223 is connected to a set of vibrating fan blades 224. The vibrating fan blades 224 are used to achieve periodic vibration air delivery under the drive of the piezoelectric element 223. The vibrating fan blades 224 and the fixed air guide vanes 222 are located on the same helical surface, which further enhances the kinetic energy of the airflow and plays a role in dynamically compensating for the airflow and maintaining a constant flow velocity. Preferably, the piezoelectric element 223 is composed of a piezoelectric ceramic layer and an elastic metal substrate. After applying an alternating voltage, it drives the elastic substrate to produce bending vibration, thereby driving the vibrating fan blades 224 to generate a continuous pulsating airflow.

[0034] In a preferred example, the vibrating fan blade 224 is connected to the piezoelectric actuator 223 to generate airflow under piezoelectric drive. The piezoelectric actuator 223 includes a piezoelectric ceramic plate and an elastic support base. The piezoelectric ceramic plate is fixedly connected to the elastic support base, and the vibrating fan blade 224 is disposed at one end of the elastic support base. When an alternating voltage is applied, the piezoelectric ceramic plate drives the elastic support base to vibrate periodically, thereby driving the vibrating fan blade 224 to vibrate and deliver air. The vibrating fan blade 224 includes at least two blades symmetrically disposed on both sides of the elastic support base. The vibrating fan blade 224 is configured as at least two plate-like structures symmetrically connected to both sides of the output end of the piezoelectric actuator 223, and its shape matches the air duct to form a multi-stage air duct effect. The fixed guide vane 222 and the vibrating fan blade 224 are disposed on the same spiral flow surface and are spirally distributed along the airflow direction to guide the piezoelectric current to form a surrounding vortex, thereby improving the stability and encapsulation of the protective air film.

[0035] Furthermore, the heat jacket 300 is a heat-insulating jacket structure with an internal cavity for airflow. The surface of the welding torch 120 has a heat-conducting layer located inside the heat jacket 300 for heating through airflow within the heat jacket 300. One end of the heat jacket 300 is connected to a gas guide ring 310 fitted onto the end of the welding torch 120, and the surface of the gas guide ring 310 has several exhaust holes 311. The heat jacket 300 is a heat-insulating sleeve structure fitted onto the outside of the welding torch 120, and one end is fixedly connected to the gas guide ring 310 via a snap-fit ​​structure. The gas guide ring 310 has multiple evenly distributed exhaust holes 311. The shielding gas, after being gathered by the gas compensation module 220, enters the gas guide ring 310 and is evenly sprayed out through the exhaust holes 311, forming a protective airflow surrounding the welding wire outlet area, preventing impurities such as oxygen and nitrogen in the air from entering the molten pool area.

[0036] In practical use, the heat sleeve 300 forms an airflow channel around the surface of the welding torch 120. During the welding process, the heat released from the outer wall of the welding torch 120 can effectively preheat the gas, improve the gas diffusion speed and sealing performance, and enhance the airflow's ability to protect the weld pool.

[0037] Furthermore, in order to achieve precise adjustment and stable operation of the system, the adjustment knob 111 is a composite control structure, including a resistance control switch and an iris valve. The iris valve is used to mechanically limit the airflow in the air supply module 110 and the air distribution box 210, and the resistance control switch is used to adjust the input voltage of the piezoelectric device 223 to control the vibration frequency and intensity, thereby achieving dynamic feedback control of the protective airflow.

[0038] In summary, this specific embodiment constructs a gas-shielded welding machine device with a compact structure, strong dynamic response capability, and functions including airflow guidance, active compensation, and heat preheating. This device demonstrates significant effectiveness in ensuring welding arc stability, continuous gas protection, and welding quality.

[0039] Working principle and usage process of this utility model: In actual use, the operator first starts the system power supply through the welding machine body 100 and turns on the gas supply module 110 to provide the required protective gas to the gas supply assembly 200. The protective gas is transmitted sequentially through the gas supply module 110, the adjustment knob 111, the gas distribution box 210 and the gas compensation module 220, and is finally guided to the front end area of ​​the welding torch 120 by the gas guide ring 310.

[0040] The adjustment knob 111 is used to manually adjust the pressure and velocity of the airflow to ensure that the gas flow rate meets the requirements of different working conditions. After entering the gas compensation module 220, the gas first passes through several fixed guide vanes 222 set inside the guide cap 221 for preliminary guidance and rectification, and then enters the area of ​​the vibrating fan blades 224 driven by the piezoelectric element 223.

[0041] When the piezoelectric element 223 is energized, it undergoes periodic deformation, driving the connected vibrating fan blade 224 to vibrate at high speed, thereby forming a forced airflow and further improving the gas velocity and flow stability. This vibrating air supply process, in conjunction with the fixed guide vane 222, causes the airflow to flow in a spiral distribution. Inside the hot jacket 300, the high working temperature of the welding torch 120 surface is fully utilized to preheat the airflow. The heated airflow forms a gas protection mechanism and stably surrounds the welding wire outlet area, thus continuously providing a uniform and stable protective gas environment to the molten pool during the welding process. Meanwhile, the heating sleeve 300 is fitted outside the welding torch 120, with one end fixedly connected to the gas guide ring 310. The surface of the gas guide ring 310 is evenly provided with multiple exhaust holes 311. After the gas is collected by the gas guide ring 310, it is ejected from the exhaust holes 311, forming a protective gas layer that covers the area around the welding point, thereby preventing oxygen, nitrogen and other air components from entering the molten pool and avoiding welding defects such as porosity and slag inclusions.

[0042] With the dynamic assistance of the piezoelectric air supply structure, the entire gas circulation path enables the device to not only have an active gas supply function, but also to compensate for the gas kinetic energy and regulate the stable flow of the airflow in real time according to the gas disturbance caused by high temperature or displacement during the welding process, thereby improving the stability of gas coverage and uniformity of protection in the welding area.

[0043] In summary, this utility model, by setting a piezoelectric auxiliary air supply component and a multi-stage flow guiding device on the outside of the welding torch 120, together with the gas supply module 110 and the adjustment knob 111 inside the welding machine body 100, constitutes a complete, efficient, and controllable gas protection system, realizing dynamic gas protection control of the molten pool area during welding operations, and improving arc stability and weld joint quality.

[0044] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A gas-shielded welding machine, characterized in that, include: The welding machine body (100), welding torch (120), gas supply assembly (200), and heat sleeve (300) fitted onto the surface of the welding torch (120) are provided. The welding machine body (100) integrates a gas supply module (110). The output end of the gas supply module (110) is connected to an adjustment knob (111). The adjustment knob (111) is connected to the gas supply assembly (200). The gas supply assembly (200) includes a gas distribution box (210) and a gas compensation module (220). The gas distribution box (210) and the gas compensation module (220) are fitted onto the outside of the welding torch (120). The gas compensation module (220), the gas distribution box (210), and the adjustment knob (111) are connected in sequence. The gas compensation module (220) includes a flow guide cap (221) and several fixed flow guide vanes (222) and a piezoelectric device (223) fixedly disposed inside the flow guide cap (221). The output end of the piezoelectric device (223) is connected to a vibrating fan blade (224). One end of the heat sleeve (300) is connected to a gas guide ring (310) sleeved on the end of the welding torch (120), and several exhaust holes (311) are opened on the surface of the gas guide ring (310).

2. The gas-shielded welding machine according to claim 1, characterized in that, The adjustment knob (111) includes a resistance control switch and an iris valve. The iris valve is used to adjust the airflow at the connection end between the air supply module (110) and the air distribution box (210). The output end of the resistance control switch is electrically connected to the end of the piezoelectric device (223) to control the working power of the piezoelectric device (223).

3. The gas-shielded welding machine according to claim 1, characterized in that, The gas supply module (110) is an air pump structure used to provide welding shielding gas to the gas supply assembly (200).

4. The gas-shielded welding machine according to claim 1, characterized in that, The vibrating fan blade (224) is connected to the piezoelectric device (223) and is used to generate airflow under piezoelectric drive. The piezoelectric device (223) includes a piezoelectric ceramic sheet and an elastic support base. The piezoelectric ceramic sheet is fixedly connected to the elastic support base, and the vibrating fan blade (224) is disposed at one end of the elastic support base. When an alternating voltage is applied, the piezoelectric ceramic sheet drives the elastic support base to vibrate periodically, thereby driving the vibrating fan blade (224) to vibrate and deliver air.

5. The gas-shielded welding machine according to claim 4, characterized in that, The vibrating fan blade (224) includes at least two fan blades, which are symmetrically arranged on both sides of the elastic support base.

6. The gas-shielded welding machine according to claim 4, characterized in that, The vibrating fan blade (224) and the fixed guide vane (222) are located on the same helical surface and are both arranged in a helical direction.

7. The gas-shielded welding machine according to claim 1, characterized in that, The heat jacket (300) is a heat-insulating jacket structure with an internal cavity for airflow. The surface of the welding torch (120) is provided with a heat-conducting layer located inside the heat jacket (300) for heat conduction and heating through the airflow inside the heat jacket (300).

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