Introduction to common ac dc tig welder

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1. What is ac dc tig welder introduction

Ac dc tig welder technology is an advanced and versatile welding method that combines alternating current (AC) and direct current (DC) current and argon gas protection for welding various metal materials. This technology is widely used in industrial manufacturing and is particularly suitable for welding highly oxidized metals such as aluminum, magnesium and stainless steel, as well as other metallic materials such as copper and titanium. The ac dc tig welding offers many advantages over traditional DC TIG welding, including its clean, stable welding characteristics and flexibility for a wide range of metals.

In ac dc tig welder, the use of alternating current helps to remove oxides from the welding area, thereby maintaining the stability and cleanliness of the welding process. This clean and stable feature makes the welding process more reliable and the welds more uniform and beautiful. In addition, ACDC welding technology can also produce deeper and wider welds, while providing better welding quality and strength, making the welding effect more reliable and durable.

Another advantage of ac dc tig welding is its suitability for a wide range of metals. Welders can adjust the ratio of AC and DC current, as well as other welding parameters, to suit different metals and welding requirements, allowing for a wider range of applications. Whether it is welding aluminum alloy aerospace parts or welding stainless steel food processing equipment, ac dc tig welder can provide high-quality welding results to meet the needs of various industrial manufacturing fields.

2. Advantages of ac dc tig welder

(1) Oxide removal and surface quality control: Highly oxidized metals such as aluminum, magnesium, etc. often form oxide layers on the surface, affecting the quality of welding. The ac dc tig welder uses alternating current to periodically remove oxides from the welding area to ensure the cleanliness and quality of the weld during the welding process. This surface quality control ensures the reliability and corrosion resistance of welded joints.

(2) Heat input control and deformation reduction: ac dc tig welder technology allows welders to precisely control welding current and voltage, as well as parameters such as welding speed and arc length. By adjusting these parameters, precise control of the welding heat input can be achieved, thereby reducing the thermal impact on the welding area and reducing thermal deformation during the welding process. This advantage is particularly significant for welding thin plates and parts with fine structures.

(3) Weld appearance and aesthetics: The appearance of welds produced by ac dc tig welder is usually very beautiful, and the welded joints are uniform, smooth, and free of pores. This kind of aesthetic appearance is especially important for some fields that have high requirements on welding appearance, such as automobile manufacturing, aerospace, etc.

(4) Welding quality and strength: The welds produced by ac dc tig welding are usually of high quality and strength. Welded joints have excellent mechanical properties, air tightness and corrosion resistance, and can meet the requirements of various engineering applications, such as aerospace, shipbuilding, food processing equipment, etc.

(5) Multi-metal welding capability: ac dc tig welder technology is suitable for welding of various metal materials, including aluminum, magnesium, stainless steel, copper, titanium, etc. This multi-metal welding capability makes ACDC welding technology a versatile and widely applicable welding method that can meet diverse welding needs.

3. AC DC tig welder metal material

(1) Aluminum and aluminum alloys: Aluminum and its alloys are widely used in aerospace, automobile manufacturing, shipbuilding and other fields. Due to the highly oxidizing nature of aluminum, traditional welding methods may lead to the formation of oxide layers, affecting welding quality. ac dc tig welder technology uses alternating current to effectively remove the oxide layer and achieve high-quality aluminum and aluminum alloy welding.

(2) Magnesium and magnesium alloys: Magnesium and its alloys have low density and good mechanical properties, and are widely used in automobile lightweighting, aerospace and other fields. However, magnesium’s highly oxidizing nature makes its welding difficult. ac dc tig welder technology can overcome the oxidation characteristics of magnesium materials and achieve high-quality magnesium and magnesium alloy welding.

(3) Stainless steel: Stainless steel has the characteristics of corrosion resistance and excellent mechanical properties, and is widely used in food processing, chemical equipment, medical equipment and other fields. ac dc tig welder technology can produce beautiful and strong stainless steel welds, ensuring the reliability and corrosion resistance of welded joints.

(4) Copper and copper alloys: Copper and its alloys are widely used in the electrical and electronic industries, such as wires, circuit boards, etc. ac dc tig welder technology can provide high-quality, reliable copper and copper alloy welding to meet the welding requirements of electrical equipment.

(5) Titanium and titanium alloys: Titanium has excellent corrosion resistance and high strength, and is widely used in aerospace, medical equipment and other fields. ac dc tig welding technology is able to meet the high requirements for welding titanium and its alloys, producing high-quality welded joints.

4. Applicable scenarios of ac dc tig welder

(1) Aerospace industry: The aerospace field has extremely high requirements for welding quality and reliability. Therefore, ac dc tig welding technology is often used in the manufacturing of aerospace parts, such as aircraft fuselages, engine parts, gas turbine blades, etc., to ensure High quality and safety of components.

(2) Automobile manufacturing: The automobile manufacturing industry has high requirements on welding quality, appearance and strength. ac dc tig welder technology is commonly used to weld automobile bodies, frames, chassis and engine parts to ensure the firmness and corrosion resistance of welded joints.

(3) Medical devices: Medical devices usually require high hygiene standards and surface finish, so they have strict requirements on welding processes. ac dc tig welder technology is often used to weld medical devices, such as surgical instruments, implants, etc., to ensure their surface quality and the reliability of welded joints.

(4) Food processing equipment: Food processing equipment has higher requirements for welding quality and hygiene standards to ensure product quality and safety. The ac dc tig welder technology is often used to weld the seams of food processing equipment, such as stainless steel food processing machinery, pipes, etc., to ensure the surface quality and corrosion resistance of the welded joints.

(5) Chemical equipment: Chemical equipment has higher requirements for corrosion resistance, high temperature resistance and sealing of welded joints. ac dc tig welding technology is often used to weld the seams of chemical equipment, such as storage tanks, reactors, pipelines, etc., to ensure long-term stable operation in harsh environments.

(6) Shipbuilding: Shipbuilding has strict requirements on welding processes, especially the seawater corrosion resistance and fatigue resistance of welded joints. ac dc tig welder technology is often used to weld hull structures, ship pipes, etc. to ensure the structural strength and durability of ships.

5. Ac dc tig welder pay attention to safety

(1) Electrical safety:

Make sure the welding machine and related electrical equipment are well grounded to prevent electric shock accidents.

Regularly check the power lines and terminal blocks of your welding equipment to ensure they are intact.

Follow the operating instructions provided by the manufacturer to connect and use welding equipment correctly and avoid using damaged or expired equipment.

(2) Argon gas protection:

Make sure the argon gas source pressure is stable and use the correct flow settings to ensure the welding area is well protected.

Use a gas flow meter to monitor argon gas flow, and regularly check whether the gas cylinder and gas tube connections are secure.

(3) Electrode selection:

Select the appropriate electrode material and diameter according to the metal material to be welded and the welding conditions.

Understand the characteristics of different types of electrodes, including tungsten electrodes, electrode shapes and ingredients, so you can choose the most suitable electrode.

(4) Welding parameter settings:

According to the metal material, thickness and welding requirements to be welded, parameters such as welding current, voltage, electrode spacing and frequency are accurately set.

Before starting welding, perform a test weld and adjust the parameters to ensure the best welding results.

(5) Mastery of welding technology:

Proficient in ac dc tig welder technology, including arc starting, stability control, welding speed and weld seam formation and other key technical points.

Pay attention to maintaining stable hand movements and welding speed to ensure continuity and consistency of the welding process.

(6) Welding environment:

Make sure the welding area is well ventilated to eliminate harmful gases and fumes produced by welding.

Keep the welding area away from flammable materials and ensure the surrounding environment is clean to prevent fire accidents.

(7) Post-welding treatment:

After welding is completed, appropriate post-processing work is performed, such as cleaning the weld, removing oxides and burrs, etc., to improve the quality and appearance of the welded joint.

Inspect and test the welding area to ensure that the welded joints meet the specifications and keep relevant records.

(8) Personal protection:

Wear appropriate personal protective equipment, including welding masks, fire-resistant clothing, gloves, and safety shoes, to protect skin and eyes from arc radiation and flames.

Avoid direct inhalation of fumes and gases produced by welding and use respiratory protective equipment for protection.

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