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3. Choose the right English equivalent to the following Russian sentence (Выберите верный английский эквивалент следующему русскому предложению):

Как правило, чем меньше диаметр шлифовального круга, тем больше его скорость вращения.

A. As a rule, the smaller the hole diameter, the higher the speed should be.

B. As a rule, the smaller the wheel diameter, the lower the speed should be.

C. As a rule, the smaller the wheel diameter, the higher the speed should be.

  • Find the equivalents in two languages (Найдите эквиваленты в двух языках):

4. grinding allowance

A. шлифовальный круг

5. rough grinding

B. патронный шлифовальный станок

6. grinding wheel

C.черновое шлифование

7. precision grinding

D. шлифовальная бабка

8. chucking grinder

E. высокоточное шлифование

F. припуск на шлифование

  1. Insert the proper words into the following sentences (Вставьте подходящие по смыслу слова в следующие предложения):

9. A distinguishing feature of grinding machines is the rotating ... tool.

10. The magnitude of the grinding allowance depends upon the required class of accuracy, size of the work and the preceding ... .

11. ... efficiently performed by grinding machines include roughing and cutting off blanks.

12. Cylindrical grinding machines are subdivided into universal and ... types.

13. In a plain cylindrical grinder only the work table can be swivelled through an ... of +- 6.

14. In the general-purpose grinders, the maximum workpiece ... ranges from 100 to 1,600 mm.

15. As to the arrangement of their spindle grinders are classified as ... and vertical.

  1. Choose the right variant (Выберите правильный вариант):

16. The primary cutting motion of an internal grinder is ...

A. table swivel

C. grinding wheel rotation

B. traverse motion

D. infeed

17. The ... of surfaces machined in grinders depends upon the type of operation being performed.

A. accuracy

C. casting

B. rolling

D. capacity

18. The operation of a ... drive is accompanied by a typical unpleasant noise.

A. flat-belt

C. pneumatic

B. hydraulic

D. electric

19. Plunge-cut grinding is usually performed on ... grinding machines.

A. internal

C. centerless

B. cylindrical

D. surface

20. Cylindrical and tapered holes are machined in ... grinders.

A. internal

C. centerless

B. cylindrical

D. surface

T exts for additional reading Unit 1

Industrial Engineering and Automation

1. A major advance in twentieth century manufacturing was the development of mass production techniques. Mass production refers to manufacturing processes in which an assembly line, usually a conveyer belt, moves the product to stations where each worker performs a limited number of operations until the product is assembled. In the automobile assembly plant such systems have reached a highly-developed form. A complex system of conveyer belts and chain drives moves car parts to workers who perform the thousands of necessary assembling tasks.

2. Mass production increases efficiency and productivity to a point beyond which the monotony of repeating an operation over and over slows down the workers. Many ways have been tried to increase productivity on assembly lines: some of them are as superficial as piping music into the plant or painting the industrial apparatus in bright colors; others entail giving workers more variety in their tasks and more responsibility for the product.

3. These human factors are important considerations for industrial engineers who must try to balance an efficient system of manufacturing with the complex needs of workers.

Another factor for the industrial engineer to consider is whether each manufacturing process can be automated in whole or in part. Automation is a word coined in the 1940s to describe processes by which machines do tasks previously performed by people. The word was new but the idea was not. We know of the advance in the development of steam engines that produced automatic valves. Long before that, during the Middle Ages, windmills had been made to turn by taking advantage of changes in the wind by means of devices that worked automatically.

4. Automation was first applied to industry in continuous-process manufacturing such as refining petroleum, making petrochemicals, and refining steel. A later development was computer-controlled automation of assembly line manufacturing, especially those in which quality control was an important factor.

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