How welding works

Бекітемін____________

ОІМ Нурмуканова Л.М

Lesson: 12

The theme of the lesson: How Welding Works

Course: 2

Date:03.10.2019

Group: 7

The aims of the lesson: To develop pupils reading,listening and audition through the text

The type of the lesson: Studying of the new material

Method of the lesson: Talking about nationalities and people

Visual aids: cards and interactive – board 

The procedure of the lesson 
I. organization moment 
- Good morning, students

Sit down, please.

Today our English lesson is a little unusual. I am very glad to see you. So, I think we are ready to start our lesson.

Who is on duty today?

Who is absent? 
II. checking up homework 
What was your homework for today?  Lecture

III. Presentation:

What does a Welder do?

Welders, often known as welder fabricators, cut, shape and join materials to make products and components in a wide variety of industries including construction, shipbuilding, engineering, transport, power, automotive, aerospace, and offshore oil and gas. They also work in these industries carrying out repair and maintenance of equipment and machinery.

Although welders primarily work with metals and alloys, they can also cut and join composite materials.Welders use a range of welding and cutting techniques in their role. Some common methods include:

• oxyacetylene – technique using a mixture of oxygen and acetylene

• MIG (metal inert gas) / MMA (manual metal arc) – also known as arc welding, is basic hand welding/cutting using electric arc equipment and a welding rod

• TIG (tungsten inert gas) – welding with nitrogen or carbon dioxide, in a tightly controlled manner, using the inert gas to shield the welding process and protect the strength of the metals being joined

• laser welding – using laser tools to produce very precise cuts/joins

• ultrasonic welding – using high frequency sound waves to melt composites or thermoplastic components, often found in automated assembly processes.

IV.Practice. 1.Work with the text

What is welding and what do welders do?

Welding is the most economical and efficient way to join metals permanently. It is the only way of joining two or more pieces of metal to 9 make them act as a single piece. Welding is vital to our economy. It is often said that over 50% of the gross national product of the U.S.A. is related to welding in one way or another. Welding ranks high among industrial processes and involves more sciences and variables than those involved in any other industrial process. There are many ways to make a weld and many different kinds of welds. Some processes cause sparks and others do not even require extra heat. Welding can be done anywhere… outdoors or indoors, underwater and in outer space. Nearly everything we use in our daily life is welded or made by equipment that is welded. Welders help build metal products from coffeepots to skyscrapers. They help build space vehicles and millions of other products ranging from oil drilling rigs to automobiles. In construction, welders are virtually rebuilding the world, extending subways, building bridges, and helping to improve the environment by building pollution control devices. The use of welding is practically unlimited. There is no lack of variety of the type of work that is done. Welders are employed in many industry groups. Machinery manufacturers are responsible for agricultural, construction, and mining machinery. They are also involved in bulldozers, cranes, material handling equipment, food-processing machinery, papermaking and printing equipment, textiles, and office machinery.

The fabricated metals products compiles another group including manufacturers of pressure vessels, heat exchangers, tanks, sheet metal, prefabricated metal buildings and architectural and ornamental work. Transportation is divided into two major groups: manufacturers of transportation equipment except motor vehicles; and motor vehicles and equipment. The first includes shipbuilding, aircraft, spacecraft, and railroads. The second includes automobiles, trucks, buses, trailers, and associated equipment.

A small group of welders belongs to the group of repair services. This includes maintenance and repair on automobiles or refers to the welding performed on industrial and electrical machinery to repair worn parts. The mining, oil extraction, and gas extraction industries form yet another group. A large portion of the work involves drilling and extracting oil and gas or mining of ores, stone, sand and gravel.

Welders are also employed in the primary metals industries to include steel mills, iron and steel foundries, smelting and refining plants. Much of 10 this work is maintenance and repair of facilities and equipment. Another group is the electrical and electronic equipment companies. Welding done by this group runs from work on electric generators, battery chargers, to

household appliances. Public administration employs welders to perform maintenance welding that is done on utilities, bridges, government armories and bases, etc. Yet another group involves wholesale and retail establishments. These would include auto and agricultural equipment dealerships, metal service centers, and scrap yards. Probably the smallest group of welders, but perhaps those with the biggest impact on the public are the artist and sculptors. The St. Louis Arch is possibly one of the best known. But there are many other fountains and sculptures in cities and neighborhoods around the world.

True or false?

1. Welding is an important process employed by modern industry.

2. All welding processes are similar.

3. All welding processes require work pieces to be heated.

4. The smallest group of welders belongs to the group of repair services.

5. Welding is the only way to join metals.

After-reading activity

Make up a summary of the text using the following sentences as a beginning:]

1. Welding is…. 2. Welding ranks… 3. There are many kinds… 4. Welding

can be made… 5. Welders can… 6. The use of welding is… 7. Welders are

employed in … .

 V. Giving the homework : learn new words (welding terminology

Mark: well you mark is….

V. Conclusion 
The lesson is over. 
Good – bye