- •Затверджено Методичною радою нтуу “кпі”
- •Module 1 text a
- •1. Learn the following words and word combinations:
- •9. Put the questions to the underlined words.
- •10. Communicative situations:
- •11. Summarize and retell the text. Text b welding: introduction
- •1. Learn the new words and word combinations:
- •2. Read and translate the text.
- •3. Answer the following questions:
- •4. Are the following statements about the text true or false? Why?
- •5. Complete the following sentences:
- •6. Find in the text the English equivalents of the following word combinations.
- •7. Chose the correct definition to the word:
- •8. Fill in the gaps with proper prepositions.
- •9. Put the questions to the underline words or word combinations.
- •10. Communicative situations:
- •11. Make up a summary of the text and use it to retell the text. Text c bending, projection, shearing, staking
- •Exercises
- •1. Learn the following words and word combinations:
- •2. Read and translate the text.
- •3. Answer the following questions:
- •4. Translate from Ukrainian into English.
- •5. Combine the following words to get proper terms:
- •6. Make the nouns from the verbs:
- •7. Put the verbs in brackets in the correct form.
- •8. Fill in the gaps with the proper prepositions.
- •9. Complete the following sentences:
- •Self-assessment module 1
- •4. Give the English equivalents of the words:
- •6. Choose the topic and prepare your mini-presentation:
- •Module 2 text a systems of automatic control of arc welding
- •Exercises
- •1. Learn the following words and word-combinations:
- •2. Read and translate the text.
- •3. Answer the following questions:
- •4. Are the following statements about the text true or false? Why?
- •5. Complete the following sentences choosing the right word in brackets.
- •6. Put the following words in the correct order.
- •7. Put questions to the following answers:
- •8. Find the English equivalents of the following words:
- •9. Find in the text the sentences with Passive Voice.
- •10. Retell the text. Text b electro-slag welding
- •Exercises
- •1. Learn the new words and word combinations:
- •Text c ultrasonic welding
- •Exercises
- •6. Put all possible questions to the following sentences:
- •Self-assessment module 2
- •2.Give the Ukrainian equivalents of the following words and word-combinations:
- •3. Are the following statements true or false?
- •4. Give the definitions to the following words:
- •5. Make up your own sentences using the following words and word combinations:
- •6. Choose the topic and prepare your mini-presentation:
- •Module 3 text a friction stir welding (fsw) of aluminium alloys
- •Exercises
- •1. Learn new words and word combinations:
- •10. Complete the questions on the text.
- •11. Communicative situations:
- •12. Retell the text. Text b plasma
- •Exercises
- •5. Continue the following sentences:
- •6. Fill in the gaps using the following words and word-combinations:
- •7. Find in the text the sentences with Passive Voice.
- •8. Make 10 questions to the text.
- •9. Choose the correct verb form in the following sentences:
- •10. Retell the text. Text c laser welding
- •Exercises
- •1. Learn the following words and word combinations:
- •2. Read and translate the text.
- •3. Answer the following questions:
- •4. Decide, whether the statements below are true or false. Why?
- •5. Put all possible questions to the sentences.
- •6. Choose the correct definition to the word:
- •7. Fill in the gaps with a proper article.
- •Self-assessment module 3
- •2. Make the verbs from the nouns:
- •3. Give the definitions to the following words:
- •4. Are the following statements true or false?
- •5. Give the Ukrainian equivalents of the words:
- •6. Choose the topic and prepare your mini-presentation:
- •Module 4 text a some aspects of corrosion of high-alloy steel
- •Exercises
- •1. Learn the following words and word-combinations:
- •2. Read and translate the text.
- •3. Answer the following questions:
- •4. Are the following statements about the text true of false? Why?
- •5. Fill in the gaps using the following words and word-combinations:
- •6. Put all possible questions to the following sentences:
- •7. Complete the following sentences from the text:
- •8. Put the following verbs in the correct form.
- •9. Find in the text the sentences with the modal verbs. Explain them.
- •10. Put ten questions to the text.
- •11. Retell the text. Text b electric welding of soft tissues in surgery
- •Exercises
- •1. Learn the following words and word combinations:
- •2. Read and translate the text.
- •3. Answer the following questions:
- •4. Combine the following words to receive proper terms:
- •5. Insert the following preposition (in-5,with-2, on-1, by-2, of-4, for-2).
- •6. Give three forms of comparison of the following adjectives:
- •7. Translate from Ukrainian into English.
- •8. Put the verbs in brackets in a proper form.
- •9. Complete the questions on the text.
- •10. Communicative situations:
- •11. Retell the text. Text c thermit welding
- •Exercises
- •1. Learn the following words and word-combinations:
- •2. Read and translate the text.
- •3. Answer the following questions:
- •4. Are the following statements about the text true or false? Why?
- •5. Fill in the gaps using the following words and word-combinations:
- •6. Translate into Ukrainian paying attention to the Participles.
- •Self-assessment module 4
- •2. Give the English equivalents of the following words and word-combinations:
- •3. Are the following statements true or false?
- •4. Read the text. Comment on the advantages and disadvantages of the floating welded mega-structures.
- •5. Choose the topic and prepare your mini-presentation:
- •Appendix
- •2. English proverbs and sayings.
- •Content
11. Communicative situations:
Make a report on the topic “ What is the usage of FSW ”
Speak with your friend about advantages and disadvantages of FSW
12. Retell the text. Text b plasma
Plasma welding. Plasma welding provides the highest effect when used for joining metals with a high thermal conductivity, such as copper, aluminium and other alloys. This method allows avoidance of preheating and performance of single-pass welding on a wide range of thickness of materials. Thus, the straight polarity plasma arc can weld copper up to 50 mm thick in a single pass without groove preparations. Plasma welding of aluminium and its alloys at a DCRP provides a high quality of welded structures up to 20 mm thick. Strength characteristics of the weld metal containing no tungsten inclusions and no oxide films are at a level of 95% of those of the base metal.
A range of the plasma welding machines has been developed. Machines operating at currents of 50, 100, 300, 500 and 800 A are available. The technology and optimal layout of the microplasma equipment have been devised for all types of welding of parts of thin-sheet metals (bellows, casings of instruments, magnetic cores, transformers and many others).
An important property of microplasma welding is a high degree of constriction of the arc and low sensitivity of sizes of the weld being formed (its width and depth) to variations in the arc length.
The use of this welding method instead of argon-arc welding leads to a substantial increase in productivity and quality of welding of thin metals (0.1 – 2.0 mm) and improves vendibility of products.
Modern electronics allows a contactless ignition of the arc, regulation of the current drop at the end of welding and fast precise setting of the process parameters.
Plasma surfacing. Surfacing can be used to make the most diverse items with the desirable surface properties, i.e. corrosion-, heat-, wear-resistant, antifriction, etc., as well as to repair worn-out pieces.
Plasma surfacing can be performed at a direct current of reverse or straight polarity, using wire or powder consumables.
Owing to minimum penetration of the base metal and its minimum dilution with the deposited metal, the process of plasma surfacing at a DCRP provides the preset properties of the metal even in the first of the deposited layers, as compared with the third or fourth layers in the case of arc surfacing. This leads to metal saving and raises labour productivity. Powder materials, such as Co-based alloys and Ni-based alloys, Fe-based powders, stainless steel and bronze wire can be used as the coating materials.
Plasma surfacing gains wide acceptance in manufacture and repair of valves of various-application internal combustion engines, rolling mill shafts and other parts.
Exercises
1. Remember the following words and word-combinations:
layout -устаткування;
bellows -ковальські міхи;
vendibility -здатність до продажу;
constriction -скорочення;
reverse polarity -протилежна полярність;
straight polarity -пряма полярність.
2. Read and translate the text.
3. Answer the following questions:
What metals is plasma welding used for?
What machines for plasma welding are available?
What are the important properties of plasma welding?
What does the modern electronics allow?
What can surfacing be used for?
What materials can be used as the coating ones?
Where does plasma surfacing gain wide acceptance?
4. Are the following statements about the text true or false? Why?
Plasma welding provides the highest effect when used for joining metals with low thermal conductivity.
The straight polarity plasma arc can weld copper up to 100mm. thick in a single pass.
Strength characteristics of the weld metal containing tungsten inclusions are very high.
The important property of microplasma welding is low degree of constriction of the arc.
Owing to the maximum penetration of the base metal and its maximum dilution with the deposited metal, the process of plasma surfacing provides the preset properties of the metal even in the first of the deposited layers.
Plasma surfacing is not used in machine- building.