Introduce the operating procedures of the welding gun

Preparation before operation

Personnel protective equipment inspection:

Operators need to wear a variety of personal protective equipment. Including fire-resistant (based on actual reports) and heat-insulating welding gloves to prevent hands from getting sick or being injured by splashing slag. Gloves should have good flexibility and high temperature resistance (based on actual reports), such as using leather gloves

Wear a protective face mask or goggles, and the shading number should be selected according to the welding process and welding current. For example, when using manual arc welding, the shading number is generally between 7-14. Protective face shields or goggles can effectively protect the eyes and face from welding glare, ultraviolet radiation, infrared radiation, and splashes

Wear fire-resistant (based on actual reports) work clothes, which should be long sleeved and long pants, made of flame-retardant fibers to reduce the damage of sparks and slag to the skin, and ensure that the collar, cuffs, and other parts of the work clothes are tightly closed to prevent slag from falling in

Work environment inspection and preparation:

Confirm that the welding work area is well ventilated. The welding process produces harmful gases and smoke, and good ventilation can effectively reduce the concentration of harmful components in the air. If working indoors, ventilation equipment such as exhaust fans, ventilation ducts, etc. can be used

Clean up flammable and explosive materials in the work area. Sparks and high-temperature slag may be generated during the welding process, which can cause fires or explosions. Move flammable materials such as paper, wood, paint, solvents, etc. within the work area to a safe distance, or cover them with fire-resistant (based on actual reports) cloth

Check if the ground is dry and flat. Avoid operating the welding gun in a damp environment, as moisture may cause electric shock accidents; Uneven ground may cause the operator to lose balance and affect operational stability

Inspection of Welding Gun and Auxiliary Equipment:

For gas welding guns, check if there are any leaks in the gas pipeline. You can apply soapy water around the pipeline connections and valves to observe if any bubbles are generated. Check if the gas pressure is normal and confirm that the pressure of combustible gases (such as acetylene, propane, etc.) and oxygen meets the equipment requirements. At the same time, check whether the gas valve is flexible and whether the adjustment function is normal

For welding guns, check whether the cables are damaged or aged. Damaged cables may cause electric shock accidents. Check if the electrode clamp is secure and if the conductive nozzle is worn. A worn conductive nozzle may affect the transmission of welding current, leading to a decrease in welding quality

Operation specifications during welding

Correct operating posture and actions:

Maintain a stable and comfortable operating posture, with feet shoulder width apart and a balanced center of gravity. This can reduce fatigue during long-term operation and contribute to the stability of the operation

When holding the welding gun, use the correct technique to ensure that the gun can be flexibly controlled. For example, for manual arc welding guns, hold the welding gun handle with your hand and place your fingers on the switch position for easy starting and stopping of welding operations at any time

During the welding process, the arms and wrists should be naturally relaxed, and the welding gun should be moved smoothly according to the welding direction and the shape of the weld seam. Avoid hand shaking, as shaking may cause uneven width and height of the weld seam

Reasonable control of welding parameters:

For gas welding, it is necessary to strictly control the gas flow rate and flame properties. Adjust the flow rate of combustible gas and oxygen according to the welding material and welding thickness to obtain a suitable flame. For example, when welding low carbon steel, a neutral flame is usually used, with a moderate ratio of oxygen and combustible gases

For electric welding, the appropriate welding current, voltage, and welding speed should be selected based on the material and thickness of the workpiece. Excessive welding current may cause the weld to burn through, while insufficient current may result in incomplete penetration of the weld seam. For example, when welding steel plates with a thickness of 3-5mm using manual arc welding, the welding current is generally between 100-130A

To avoid the occurrence of dangerous situations:

Prevent electric shock. When using an electric welding gun, ensure that the gun is properly grounded and the operator stands on a dry insulating pad. Avoid physical contact with the live parts of the welding gun and the uninsulated parts of the weldment

Prevent tempering (mainly for gas welding guns). If the flame is extinguished and accompanied by a "hissing" sound, it may indicate a backfire. At this point, the gas valve should be immediately closed, wait for a moment, and then reignite. To avoid tempering, maintain stable gas pressure and do not excessively adjust gas flow rate

The specific focus is on clinical efficacy and illness. Pay attention to the welding pool and splashing slag, and do not let the skin come into contact with high-temperature areas. If slag splashes onto clothes, do not pat them with your hands. Instead, let them cool naturally before cleaning

Precautions after operation

Shut down the equipment and clean the site:

For gas welding guns, first close the combustible gas valve, then close the oxygen valve, and release the remaining gas. For welding guns, turn off the power switch and organize the cables and electrode clamps

Clean the work area, collect waste materials, slag, etc. generated during the welding process, and place them in designated containers. Check if there are any residual sparks around and confirm that there are no fire hazards

Equipment maintenance and upkeep:

Perform a simple cleaning of the welding gun to remove surface dust, oil stains, and slag. Key components such as the nozzle of the gas welding gun and the conductive nozzle of the electric welding gun should be inspected and cleaned. If there is any blockage or damage, they should be replaced in a timely manner

Store the welding gun and accessory equipment in a dry, well ventilated place to avoid moisture, rust, and damage. At the same time, conduct regular and comprehensive inspections and maintenance of the equipment to confirm its good performance and prepare for the next use