Answer the questions

КОГПОБУ

«Вятский автомобильно-промышленный коледж»

 

 

МЕТОДИЧЕСКОЕ ПОСОБИЕ

ПО АНГЛИЙСКОМУ ЯЗЫКУ

по профессии:

«Сварщик»

 

Кирово-Чепецк, 2019

 

Text 1

Welding.

Read and translate the text.

Welding is a process when metal parts are joined together by the application of heat, pressure, or a combination of both. The processes of welding can be divided into two main groups:

•pressure welding, when the weld is achieved by pressure and

•heat welding, when the weld is achieved by heat. Heat welding is the most common welding process used today.

Nowadays welding is used instead of bolting and riveting in the construction of many types of structures, including bridges, buildings, and ships. It is also a basic process in the manufacture of machinery and in the motor and aircraft industries. It is necessary almost in all productions where metals are used.

The welding process depends greatly on the properties of the metals, the purpose of their application and the available equipment. Welding processes are classified according to the sources of heat and pressure used: gas welding, arc welding, and resistance welding. Other joining processes are laser welding, and electron-beam welding.

Vocabulary

pressure welding  сварка – давлением  heat welding - сварка нагреванием

instead - вместо, взамен               bolting -скрепление болтами

riveting -   клепка                               basic - основной

to manufacture – изготовлять               to depend - зависеть от

gas welding - газосварка                       arc welding - электродуговая сварка

resistance welding  - контактная сварка laser welding - лазерная сварка

electron-beam welding - электронно-лучевая сварка

Answer the questions.

1. How can a process of welding be defined?

2. What are the two main groups of processes of welding?

3. How can we join metal parts together?

4. What is welding used for nowadays?

5. Where is welding necessary?

6. What do the welding processes of today include?

 

Find in the text.

1. Сегодня сварка используется вместо соединения болтами.

2. Сварочный процесс в основном зависит от свойств металла.

3. Она необходима почти во всех производствах, где используется металл.

4. Сварка нагреванием – самый распространенный процесс сварки сегодня.

5. Это основной процесс в машиностроении.

Find 8 words and write them.

H	E	A	T	Q	J	Z	P
D	F	G	G	H	O	C	A
X	C	V	T	G	I	F	R
W	E	L	D	I	N	G	T
V	B	A	N	N	M	A	R
A	W	S	E	S	X	S	F
R	S	E	S	C	E	H	V
C	X	R	M	E	T	A	L

Read in the text.

1. …… are laser welding, and electron-beam welding.

2. …… in all productions where metals are used.

3. …… on the properties of the metals.

4. …… or a combination of both.

5. …… when the weld is achieved by heat.

 

Text 2

Kinds of welding.

Read and translate the texts.

Gas Welding.

Gas welding is a non-pressure process using heat from a gas flame. The flame is applied directly to the metal edges to be joined and simultaneously to a filler metal in the form of wire or rod, called the welding rod, which is melted to the joint. Gas welding has the advantage of using equipment that is portable and does not require an electric power source. The surfaces to be welded and the welding rod are coated with flux, a fusible material that shields the material from air, which would result in a defective weld.

Arc Welding

Arc-welding is the most important welding process for joining steels. It requires a continuous supply of either direct or alternating electrical current. This current is used to create an electric arc, which generates enough heat to melt metal and create a weld.

Arc welding has several advantages over other welding methods. Arc welding is faster because the concentration of heat is high. Also, fluxes are not necessary in certain methods of arc welding. The most widely used arc-welding processes are shielded metal arc, gas-tungsten arc, gas- metal arc, and submerged arc.

Vocabulary

flame  пламя                                             edge край

simultaneously одновременно                             filler наполнитель

wire проволока                                         rod прут, стержень

to melt плавить(ся)                                   joint соединение, стык   

coated покрытый

 

Answer the questions.

1. What do the welding processes of today include?

2. What are the principles of gas welding?

3. What kinds of welding can be used for joining steels?

4. What does arc welding require?

 

Find in the text.

1. процесс сварки

2. имеющееся оборудование

3. сварочный электрод

4. плавкий материал

5. непрерывная подача электрического тока

6. электрическая дуга

7. источник электрического тока

Read in the text.

1. …to melt metal and create a weld.

2. …advantages over other welding methods.

3. …using heat from a gas flame.

Text 3

Welding methods.