Read and remember :
№ | English | Transcription |
Translation
Joining
Welding
Article
Depending
Joint
Strength
To be required
Soldering
To river
Permanent
Heating
Flame
To hammer
Weld
Care must be taken to ensure
Dirt
To weaken
To cause
Oxidation
Film oxide
Flux
To dissolve
To apply
Impurities
To squeeze
Vel – shaped
Butt – weld
Lap – weld
To generate
Xy – acetylene torch
Filler rod
Spot welding
Overlap
Laser welding
Electronic flam welding
Arc
Arc welding
1. Read the following Text:
WELDING
1. Welding is a process of joining together metallic parts by heating the place of contact to the fusion state.2. Welding processes are classified according to the source of energy employed for heating, the metals and the state of the metal at the place of welding.3. There are different types of welding such as hammer welding, thermit welding, electric arc welding, gas welding, etc.4. Hammer welding is a process in which two heated metal parts are joined and fused together by force from a power hammer.5. Thermit welding is a process consisting of a chemical reaction. 6. It is used in repairing large sections such as rails, frames, etc.7. Resistance welding process forms a whole group consisting of many types of welding such as spot welding, butt welding and others.8. In arc welding the workpieces are not melted by a flame. 9. They are melted by an electric arc. In order to create the arc, a powerful electric current must be provided. 10. The current must be at least 60 A, otherwise the arc will not create enough heat.11. In gas welding, it is necessary to use a mixture of two gases. 12. To create a hot flame, a combustible gas must be mixed with oxygen.13. Gas welding is normally used to join steel to steel.
Translate the Text in writing.
Put 7 general questions to the Text.
Retell the main idea from the Text.
Home Test
Ex.1 Match the sides:
№ | English | Transcription |
Translation
Joining
Welding
Article
Depending
Joint
Strength
To be required
Soldering
To river
Permanent
Heating
Flame
To hammer
Weld
Care must be taken to ensure
Dirt
To weaken
To cause
Oxidation
Film oxide
Flux
To dissolve
To apply
Impurities
To squeeze
Vel – shaped
Butt – weld
Lap – weld
To generate
Xy – acetylene torch
Filler rod
Spot welding
Overlap
Laser welding
Electronic flam welding
Arc
Ex.2 Choose the right variant.
1. Welding: a ) пайка; b ) шов; c ) сварка . | 2. Strength: a) A) прочность; b) B) длина; c) c) ширина. | 3. Heating: a) охлаждение; b) нагрев; c) плавка | 4. To apply: a) A) крепить; b) B) соединять; c) C) применять. |
VOCABULARY
v неразъемное соединение – a solid bond;
v технология – process, technology;
v угольный электрод – carbon electrode;
v точечная сварка – spot welding;
v роликовая сварка – roller welding;
v контактная сварка – resistance welding;
v припой – solder;
v переменный ток – alternating current;
v постоянный ток – direct current;
v легированный – alloyed;
v добавка – additive;
v увеличиваться / уменшаться (о токе) – to amplify / to attenuate.
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Дата: 2019-02-25, просмотров: 289.