8. Ответьте на вопросы по тексту на английском языке.

1. What is the shape of a cutter in a milling machine?

2. What moves in a milling machine, a table or a cutter?

3. What possible movements has the table of a milling machine?

4. What kind of surfaces and shapes may be machined by a milling machine?

5. What can we use a drilling machine for?

6. What kinds of drilling machines exist?

7. What is rotated while boring, a cutter or a work-piece?

8. Describe the work of a shaper (planer).

9. What must be done to execute multiple simultaneous cuts on a planer?

Answers:

1. In a milling machine the cutter is a circular device with a series of cutting edges on its circumference.

2. The table on the milling machine is controlled by feeding in front of the cutter.

3. The table has three possible movements: longitudinal, horizontal, and vertical; in some cases it can also rotate.

4. Flat or contoured surfaces may be machined with excellent finish and accuracy.

5. To drill a hole usually hole-making machine-tools are used.

6. They can drill a hole according to some specification, they can enlarge it, or they can cut threads for a screw or to create an accurate size or a smooth finish of a hole.

7. During boring cutter rotates.

8. The shaper is used mainly to produce different flat surfaces. The tool slides against the stationary workpiece and cuts on one stroke, returns to its starting position, and then cuts on the next stroke after a slight lateral displacement.

The planer is the largest of the reciprocating machine tools. It differs from the shaper, which moves a tool past a fixed workpiece because the planer moves the workpiece to expose a new section to the tool.

9. It is necessary to mount several tools at one time in any or all tool holders of a planer to execute multiple simultaneous cuts.

9. Переведите на английский язык.

1. Токарный станок все еще остается самым важным станком.

2. Все современные токарные станки оборудованы электроприводами.

3. Движение инструмента контролируется с высокой точностью.

4. Электропривод позволяет обрабатывать заготовку на различных скоростях.

Translation:

1. The lathe is still the most important machine.

2. All modern lathes equipped with electric drives.

3. Movement of the tool is controlled with high precision.

4. Electric drive allows you to process the workpiece at different speeds.