Laser and Plasma Welding

1. Welding is process which provides non-detachable joining of two like metal pieces by heating them till melting condition or fusion without or with mechanical pressure.

2. Laser welding is quickly becoming a practical welding process. In its present stage of development, the laser can form welds up to about 1/32 inch deep.

3. Pulsed lasers are often used in industry today. The laser’s heat input is very small, so the heat-affected zone around a joint is correspondingly small.

The laser’s high power intensity permits welds between dissimilar metals of widely varying physical properties.

4. Plasma arc welding is efficient for fusion welding stainless steels, titanium, nickel from 0.001 to 0.030 inch thick. The process is particularly well suited for repairing delicate parts, for joining thin structures, and for welding electronic components. With the exception of aluminum any metal or combination of metals can be welded with plasma arc process.

1. Прочитайте текст и выполните следующие за ним упражнения.

1. Переведите на русский язык следующие слова, классифицируйте их по способу образования:

Рrocess, metal, mechanical, type, laser, practical, form, industry, physical, plasma, steel, titanium, nickel, aluminum, structure, electronic, intensity.

2. Найдите в правой колонке русские эквиваленты английских словосочетаний:

1) non-detachable joining a. дуговая сварка

2) to replace b. соответственно

3) arc welding c. в частности

4) laser welding d. стык, соединение

5) application e. за исключением

6) to weld f. неразъёмное соединение

7) pulsed laser g. неодинаковые (разные)

8) joint h. сварить

9) correspondingly i. плазменная сварка

10) to permit j. заменять

11) dissimilar k. пульсирующий лазер

12) plasma arc welding l. применение

13) particularly m. позволять

14) with the exception n. лазерная сварка.

3. Закончите предложения, выбрав соответствующий вариант окончания:

1. Welding is a process which provides....a) a detachable joining of two unlike metal pieces by heating them till melting condition.

b) a detachable joining of two like metal pieces by

heating them till melting condition.

c) a non-detachable joining of two like metal pieces by heating them till melting condition.

 

2. The laser’s high power a) between similar metals of having the

intensity permits welds.... same physical properties.

b) between dissimilar metals of widely varying physical properties.

c) between dissimilar metals of similar physical properties.

 

3. The process of plasma a) aluminum.

arc welding is efficient b) combination of aluminum and nickel.

for fusion welding.... c) stainless steel, titanium, nickel.

 

4. Plasma arc welding is a) repairing aluminum parts.

particularly suited for.... b) repairing delicate parts.

c) repairing massive and thick parts.

4. Найдите соответствующие ответы на вопросы и напишите их в той последовательности, в которой заданны вопросы:

Вопросы

1. What king of joining does welding provide?

2. What type of welding can replace arc welding?

3. What is the advantage of laser welding?

4. What metals is plasma arc welding efficient for?

5. Where is the process of plasma arc welding used?

Ответы

a. Laser welding.

b. A non-detachable joining.

c. For fusion welding stainless steel, titanium and nickel.

d.The laser’s high power intensity permits welds between dissimilar metals of widely varying physical properties.

e. In repairing delicate parts, for joining thin structures and for welding electronic components.