- •Unit 3 turning and turning machines (lathes)
- •1. Read and memorize the following words and word-combinations:
- •Types of lathes
- •1. Give the main points of the text, answering the following questions:
- •2. Choose synonyms out of the following list:
- •3. Fill in the blanks with the suitable words from the text. The words are given below.
- •4. Perform the following tasks, basing of the text.
- •5. Characterize lathes according to the following plan:
- •Text 2 Engine Lathe
- •1. Give the main points of the text, answering the following questions:
- •2. Using the text, give derivatives from the following words and translate them into Russian:
- •3. Replace Russian words and word combinations by the corresponding English equivalents:
- •4. Make up questions to which the italicized words are answers:
- •5. Make up a summary of the text. Text 3
- •Vertical Eight - Spindle Semiautomatics
- •5. Give a brief summary of the text.
- •1. Answer the following questions, using the information from the text:
- •2. Translate the following groups of words, paying attention to the meaning of suffixed:
- •3. Fill in the blanks with the preposition: for, of, in, with, by, out, from, to.
- •4. Find the English equivalents for the following:
- •5. Supply the missing word:
- •Upright Drill Presses
- •1. Underline the suffixes in the following words and state what part of speech they belong to:
- •3. Translate the following sentences observing different meanings of the italicized words and word combinations:
- •4. Guess the meaning:
- •5. Describe the function and characteristics of the principal units of an upright drill press, using the active vocabulary of the text:
- •6. Try to translate the text without using the dictionary:
- •Radial Drills
- •1. Find in the text:
- •2. Find English equivalents:
- •3. Make sentences out of the two parts:
- •4. Translate the following in writing.
- •5. Make a brief summary of the text.
- •Unit 5 grinding and grinding machines
- •Purpose and Field of Application of Grinding Machines
- •Text 2 Cylindrical Grinding Machines
- •6. Summarize the text. Text 3
- •Internal Grinding Machines
- •1. Name the main points of the text answering the following questions:
- •2. Fill in the blanks using the words below:
- •3. Find in the text English equivalents for the following words and word combinations:
- •4. Using the text supply
- •5. Summarize the text.
1. Underline the suffixes in the following words and state what part of speech they belong to:
Axial, directly, casting, principal, cavity, attachment, considerable, different, manual, rotation, clamped, heavy, enable, available, motion, housed.
2. Give different meanings of the following words: Way, work, head, house, hand, power.
3. Translate the following sentences observing different meanings of the italicized words and word combinations:
Drilling means removing some metal from the work.
A drilling machine is by all means the most important machine for drilling holes of different size in metal.
By no means can a boring machine be used at speeds exceeding permissible ones as it may result in breakage.
Boring may be performed on drilling machines.
The main drilling motor drives the shaft by means of V-belts.
When we speak of the operations performed on the drilling machine, we mean such operations as tapping, reaming, lapping, etc.
4. Guess the meaning:
What is it?
It’s the rotation of the spindle.
It’s the axial motion of the spindle.
It’s placed on the work table or directly on the base.
It’s a hollow box-shape casting.
It’s the footing on which the whole machine is supported.
It’s has a spline shank which fits the spline hole.
It’s held at the lower end of the spindle.
It’s a unit on which the workpiece is clamped.
What are they?
They run at 6 to 12 different speeds.
They serve as a reservoir for the cutting fluid.
They are placed on the top surface of the base.
They are housed in the cavity of the column.
They are available for drilling a series of holes in a work-piece without resorting to a jig.
5. Describe the function and characteristics of the principal units of an upright drill press, using the active vocabulary of the text:
6. Try to translate the text without using the dictionary:
A considerable part of the handling time in hole-making operations involves the changing of the cutting tool. The use of a quick-change chuck, enabling tools to be changed without stopping the spindle, substantially reduces this handing time. The degree of automaticity of the machine, however, is not increased since tool changing is still done by hand.
The degree of automaticity can be increased if the upright drill press is equipped with a special turret which is indexed and locked automatically. In this case, automatic control of the spindle speeds and feed is also required. Promising in this line is the new upright drill press, model 2B135, designed in the ENIMS Institute. The speed gearbox of this machine is equipped with noncontact electromagnetic clutch is incorporated in the feed gear train, enabling spindle feeds to be automatically controlled in a stepless range. An overrunning mechanism is provided in the feed gear train for hand, traverse of the spindle.
A drill press of this type can be readily built into an automatic transfer machine or automated production line.
T ext 3