E n g i n e L a t h e

1. The engine lathe is the most commonly used machine-tool. It is used for great variety of metal operations, such as turning, drilling, screwing and many other.

2. The principal units of the lathe are the bed, the headstock, the tailstock and the carriage with the apron.

3. The bed is the base of any machine-tool and it is made of grey iron casting on which the saddle and the tailstock slide along special guideways. The headstock is also located and bolted on the bed.

4. The headstock contains the spindle and the speed gearbox. The spindle is the part of the machine to which power is applied to rotate the work. The changing of the spindle speed is effected by levers.

5. The tailstock consists of a casting fitted to bed. The function of the tailstock is to support one end of the work turned between centres and to mount the tools.

6. The carriage of the lathe, which carries the tool, is made up of two principal parts: the saddle and the apron. The saddle travels along the guideways of the bed. The apron represents the front wall of the carriage. On the front of the apron are mounted the handles and levers by which the actions of the tool are controlled.

Прочтите текст и выполните следующие за ним упражнения.

2.Найдите в правой колонке русские эквиваленты английских слов и словосочетаний:

1. engine lathe a. задняя бабка

2. turning b. фартук (суппорта)

3. drilling c. каретка

4. screw cutting d. передняя бабка

5. headstock e. сверление

6. ailstock f. токарно-винторезный станок

7. saddle g. нарезание винтов

8. lever h. рычаг

9. apron i. рукоятка

10. carriage j. суппорт

11. guideways k. обточка

12. handle l. направляющие (станка)

3. Переведите на русский язык встречающиеся в тексте интернациональные слова:

Мetal, operation, principal, spindle, function, center, control, base, special, bolt.

Переведите на русский язык в письменной форме абзацы 3, 4 и 5.

5. Найдите соответствующие ответы на вопросы и напишите их в той последовательности, в которой заданы вопросы:

Вопросы

1. What operations is the engine lathe used for?

2. What are the principal units of the lathe?

3. What units are located on the bed?

4. What is the function of the tailstock?

5. Where are the handles and levers mounted?

Ответы

a. To support one end of the work turned between centres.

b. On the front of the apron.

c. For turning, drilling, screwcutting and others.

d. The headstock, the saddle and the tailstock.

e. The bed, the headstock, the tailstock and the carriage with the apron.

Закончите предложение, выбрав соответствующий вариант.

1. The unit contains the spindle and the gearbox is called …. 2. The unit that supports one end of the work turned between centres is called …. 3. The unit which carries the tool is called ….   4. The unit on which the saddle and the tailstock slide is called ….     5. The units, by which the actions of the tool are controlled, are called ….

a) the carriage; b) the headstock; c) the tailstock.   a) the carriage; b) the bed; c) the headstock.   a) guideways; b) the saddle and the apron; c) lever and handles.