Presented in short, easy-to-understand modules, this multimedia, online course is ideal for both students and professionals who want to expand their core competencies. The AWS Welding Fundamentals Course is designed for anyone who wants to familiarize themselves with the science, methodology, terminology, and applications of the most commonly used welding and cutting processes. This course is ideal for students who need to learn the basics and established welders who want to expand their core competencies.
More Topics Be Prepared: Five Potential Welding Safety Hazards to Avoid The welding arc creates extreme temperatures and may pose a significant fire and explosion hazard if safe practices are not followed.
By John Petkovsek Apr 01, Safety is a critical consideration for any welding project. Arc welding is a safe occupation when proper precautions are taken, but if safety measures are ignored, welders face an array of hazards that can be potentially dangerous, including electric shock, fumes and gases, fire, explosions, and more.
Welding operators face an array of hazards. To help keep welders safe, organizations such as the American Conference of Governmental Industrial Hygienists and OSHA offer safety guidelines to help control, minimize, or to help employers and workers avoid welding hazards.
Employers should ensure that all workers have an opportunity to comply with the following important guidelines in the workplace: Read and understand manufacturer instructions for equipment Carefully review safety data sheets Follow the company's internal safety practices Awareness of the most common welding hazards and knowing how to avoid them ensures a safe, productive work environment for all.
Electric Shock Electric shock is one of the most serious and immediate risks facing a welder. Electric shock can lead to severe injury or death, either from the shock itself or from a fall caused by the reaction to a shock.
Electric shock occurs when welders touch two metal objects that have a voltage between them, thereby inserting themselves into the electrical circuit.
For instance, if a worker holds a bare wire in one hand and a second bare wire with another, electric current will pass through that wire and through the welding operator, causing an electric shock. The higher the voltage, the higher the current, and thus the higher the risk for the electric shock to result in injury or death.
The most common type of electric shock is secondary voltage shock from an arc welding circuit, which ranges from 20 to volts. Bear in mind that even a shock of 50 volts or less can be enough to injure or kill an operator, depending on the conditions.
Due to its constant change in polarity, alternating current AC voltage is more likely to stop the heart than direct current DC welders.
It is also more likely to make the person holding the wire unable to let go.
It's important to remember never to touch the electrode or metal parts of the electrode holder with skin or welding clothing.
Also, insulate yourself from the work and ground. To avoid secondary voltage shock, welding operators should wear dry gloves in good condition, never touch the electrode or metal parts of the electrode holder with skin or wet clothing, and be sure to insulate themselves from the work and ground, keeping dry insulation between their body and the metal being welded or ground such as a metal floor or wet surface.
Welding operators also should inspect the electrode holder for damage before beginning to weld and keep the welding cable and electrode holder insulation in good condition, because the plastic or fiber insulation on the electrode holder prevents contact with the electrically "hot" metal parts inside.
Always be sure to repair or replace damaged insulation before use. And remember, stick electrodes are always electrically hot, even when welding is not being done and the voltage is the highest.
An even more serious shock, primary voltage shock, may occur when a welder touches electrically "hot" parts inside the welder case or the electric distribution system to which the welder is connected.
This action can lead to a shock of or volts.
When not in use, but still turned on, most welding equipment has a voltage that ranges from 20 to volts at the welding circuit, and voltages inside the welding equipment may range from volts to more than volts, all of which pose a risk for electric shock.
Only qualified repair technicians should attempt to service or repair welding equipment. Fumes and Gases It's no surprise that overexposure to welding fumes and gases can be hazardous to your health.
The specific potential health effects related to the welding consumable product being used can be found in the Health Hazard Data section of the safety data sheet that is available from your employer or the consumable manufacturer. Welding areas require adequate ventilation and local exhaust to keep fumes and gases from the breathing zone and the general area.
In most situations, employers will provide a ventilation system--such as a fan and an exhaust system or fixed or removable exhaust hoods--to remove fumes and gases from the work area. These limits specify the amount of a substance in your breathing air to which welding operators can be exposed every day they work over the course of their career.
Welding operators should wear an approved respirator unless exposure assessments are below applicable exposure limits. An industrial hygienist takes an air sample in the worker's breathing zone to determine whether a worker's exposure is below the exposure limits.
If the air in your breathing zone is not clear or if breathing is uncomfortable, check to be sure the ventilation equipment is working and report concerns to a supervisor so your exposure to substances in the welding fume can be checked.Clean, grind, and deburr cut parts, and accomplish different finishes using various metal shop tools, including the angle grinder and its many attachments.
Learn how to change belts on the belt sander to suit the needs of every project. WELDS-STATIC AND FATIGUE STRENGTH-II The yield stress of the weld metal is also raised due to the quenching effect.
The metal alloys constituting the electrode contribute to the increase in yield stress. The AWS Welding Fundamentals Course provides a comprehensive overview of the basic principles of welding. Participants will learn the basic science and practical application of the most commonly utilized welding processes along with other essential topics, including welding terminology, weld design, welding safety, electrical theory, the weldability of metals, and welding quality control.
There are all kinds of different types of welding but when it comes to the types of welding done most to build and fix leslutinsduphoenix.com are really 3 main types. I wont even include gas welding in this discussion because so few people use it these days.
except for metal sculpture artists, and a few other purists like experimental aircraft. Be Prepared: Five Potential Welding Safety Hazards to Avoid by John Petkovsek, Director, Environment, Health and Safety, The Lincoln Electric Company Safety is a critical consideration for any welding project.
This is the most basic of all welding types. The welding stick uses electric current to form an electric arc between the stick and the metals to be joined. To weld iron and steel, this type of welding is often used in the construction .