4.0 Discussions
In this experiment, a butt joint was required to be made between two mild steels of dimensions 50 mm x 85 mm x 6 mm. A butt joint is one of the five basics joint in welding. Mild steel electrodes (MS 6013) of diameter 2.6 mm were provided to be used to join the two pieces of metal. For the diameter, the minimum amperage needed is 60A and the maximum it can retain is 100A.
For the welding to be successful, an arc gap of 2 mm must be maintained throughout the operation. Also, the travel speed of the electrode must be slow in order to produce a uniform weld and the current must be kept constant in order to produce a stable arc. The welding power supply was set to number 2 of scale 1-5 to provide the amperage between 60A to 100A.
After a number of practice, the first welding sample was made. The sample was made with minimal welding experience and hence resulting in an unsatisfactory welding. There were obvious holes in the weld area. Other than that, the weld was not uniform. There were areas that was too thin and other areas that
…show more content…
From the first-hand experience obtained from the experiment, further understanding has been provided. By doing the hammer test, the strength of the metal can be identified and the quality of welded metals was also assessed. In can also be concluded that the second sample has much better quality than the first sample from the hammer test and visual inspection. All in all, a good travel speed, current and arc gap must be present in order to produce a good weld of metals.
6.0 Reference
Hicks, J. (2000). A Guide to Designing Welds. Cambridge, England: Abington Publishing.
Gourd, L. M. (1995). Principles of Welding Technology (3rd ed.). Bristol, Great Britain: Edward Arnold.
Helzer, S. C. & Cary, H. B. (2005). Modern Welding Technology (6th ed.). United States of America: Pearson Prentice
...anged innumerable times over the project's life. Continual rework and time delays had hampered progress. Bolger had reported design errors that necessitated the refitting of complex equipment and rework of the aluminum welding. Materials requirements included the use of welded aluminum. Bolger normally employed only steel welders; aluminum welders were in short supply and impatient during work stoppages. The Bolger contract was cost based plus a fixed fee. A particularly disturbing problem was Bolger's cost reporting system. Bolger contract negotiators waited for up to three weeks for cost data.
scientific experiments (Go welding: history of welding 1). Conventional welding is most easily explained as arc welding processes. Some arc welding processes are TIG welding, Stick Welding(SMAW), and MIG welding. TIG stands for Tungsten Inert Gas welding this means that using tungsten as a electrode and an inert gas, which is usually argon, the weld is produced by creating an arc between the piece being welded and the tungsten electrode. SMAW or stick welding utilizes a stick electrode held in a clamp surrounded by a powdered substance to weld. Mig welding uses a machine that holds a wire feeder within it, the wire feeder feeds the wire electrode through a tube to a gun that slowly sends out the wire as well as a steady flow of inert gas. These and other processes classified as conventional welding processes are the best processes for welding jobs because they are more cost effective, more...
Thomas Jefferson said, “I find that the harder I work, the less I call it work”. I have often found myself in situations where I needed to fix something but could not because it is metal. I believe this might be why I began to show interest in welding. There is great satisfaction in being able to create or fix a metal object on your own. As a Certified Welder, I will be able to combine my hardworking drive with my personal interest in metal working to be a successful welder. This paper will explore the job description, requirements, and salary expectation for a Certified Welder.
The creation of oxy fuel welding and development of the first torch where two French engineers Edmond Fouche and Charles Picard became the first engineers to create the first stages of
What is welding some may ask. “Welding is the use of brazing or soldering to join together or split apart pieces of metal.” Says miller electric inc. The First recorded forms of welding was from the bronze age when metal boxes were made by “pressure welding lap joints together.” In medieval times welding was used by hammer to forge weapons of different types. “It was actually not until the late 1800’s that traditional welding
Welders can use hand held welders or even robotic welders to produce welds. Both equally requiring a incredible amount of knowledge. They can also fill holes, produce structures and build custom parts for automotive race shops. Welders often work fulltime on shipyards, oil rigs, and pipelines or anywhere else where a specific job is needed. Welders are often required to interpret blueprints or sketches and weld accordingly to fulfill job duties. Arc welding is the most common type of welding today and is what most welders use. (bls) There are over 100 different welding processes that a welder can learn how to use however, Stick, Tig and Mig are the 3 most common used in the industry. These are used most to maintain equipment
Welding is a very important job in today’s society. With new building designs, and bridges to every day metal products, welders are needed to do these tasks. Almost everything that you use every day has some sort of weld to it.
Welding was invented in the 1900s but lets go back a little to middle age that was when blacksmithing was the best method to use before welding. Now Edmund Davy of England was the one who discovered acetylene in 1836. Some of the others inventors were Auguste De Meritens who worked on how heating of an arc can join two pieces of metal, C.L. Coffin was one one who created a welding process with an electrode. There was other people that helped make welding more efficient. As the years past by welding was getting...
In doing so, they weld metal parts, fill holes, and can even repair cracks in a brace. Because of its heavy duty strength, welds can be used to repair cars, ships, and even airplanes. Also, welds are used in the construction of buildings and bridges. Various tools are needed to perform proper welding techniques, for example, a person may need clamps, welding rods, a chipping hammer, a torch, glasses, a welding helmet, an apron or non flammable clothing to properly weld metal. In addition, a person may also need a specific type of welder for a certain occasions.
The first evidence of welding dated all the way back to the bronze age. The first people that found out how to weld were the Egyptians the Egyptians were smart enough to figure out how to weld. In the 19th century they figured out they could use acetylene for welding. A Englishman named Edmund Davy is the one that discovered acetylene in 1836. Then in 1880 Auguste De Meritens figured out how to fuse two lead plates together from the heat generated by an arc. Then in 1890 C.L Coffin discovered carbon arc welding which is one of the most common welding process used in today's world. Then in 1900 is were welding got introduced to a lot more advanced welding such as, seam welding, spot welding, flash butt welding, projection welding, and also electrodes were invented at the same time. A electrode is a piece of metal coated in lime to make the arc much more stable which results in better welding turn out. Then in 1919 CJ Holstag discovered alternating current. Then in 1920 P.O Nobel invented automatic welding which is a big thing in today's world. Then in 1930 New York Navy Yard developed stud welding which is used mainly for the construction industry. Then in the 1960s more welding techniques were developed such as, dualshield welding, innershield welding, and electroslag welding were
GMAW (Gas Metal Arc Welding) is more economic; Springer reports that “ GMAW is an economic process because it has higher speeds and higher deposition rates than manual arc welding. There is also no need to constantly change electrodes” ( Page 11). GMAW has a higher speed, which means that you can get the job done faster. It also has high deposition rates which makes the weld look clean and smooth.” This method can be used for a high range of work, but it is not suited for repair work because of it’s weld quality” (Page 4). This process can be used for many variations of work including root welds, joints, T’s, butts, laps, and many more applications. Even though its used for many practices, it is not recommended to use this method for repair work because of the quality of the welds. “ It’s easy to use and it is inexpensive to afford now with 110v machines. But you cannot weld for a long time like a 220v machines would produce. Both have different duty cycles” (Parag. 7). M.I.G is something anyone can learn easily, it’s inexpensive to afford. 110v machines don't bring out the best power to weld, because these machines do not have a good duty cycle. Most people prefer 220v machines because they produce more work, even if they are more expensive. GMAW is the cheapest most reliable process for welding.
Welding is an art, science, and high paying career all in one. Welding is the most effective way to join two pieces of metal, it is the only way to join them so they act as one. Numerous things in our daily lives has been welded from coffeepots to skyscrapers. Welding can be done almost anywhere outdoors, indoors, underwater, and even space (“Welding Basics”). It is practically
?Automation Reduces Weld Spatter? Welding Design & Fabrication (Jun. 2001): 37 EBSCOhost. Online. Nov. 2002 .
There is different types of rods and different types of ways to weld. You need a lot of training for it. There are many schools and colleges you can go to receive welding education. The most common welding processes are Gas Metal Arc Welding, Flux Core Arc Welding, Gas Tungsten Arc Welding and Shielded Metal Arc Welding. The easiest of these is the Gas Metal Arc Welding. Welding options are stick, flux core, tig, and mig. The pipeline tig and stick welds a lot more than the other .The pipeline use many types of techniques but, the most common on the pipeline is downhill root pass and the up hill pass. The median annual wage of welders, cutters, solderers, and brazers is
This lesson is designed to review and reinforce a few important concepts about plants (e.g. Needs, parts, sequence of planting) and to also guide the students through applying a few scientific inquiry (e.g. Making observations, experimentation, discussion, reflection, reporting results etc.). The students have previously planted corn and bean seeds and today’s lesson has provided the students a chance to see the results of the planted corn and bean seeds. Additionally, seeds have been planted under and growing under the following conditions: without water, and without soil. The students see the results of these seeds planted under these conditions for the past week. Two plants in particular have already been grown their growth has been