- •Unit 5: Metalworking and welding
- •1. Read the text and say what the main metalworking processes are:
- •3. Match the terms with their right definitions.
- •4. Answer the following questions.
- •5. Translate the following sentences from Ukrainian into English using active vocabulary and information from the text to the subject.
- •1. Read the text and say what metal cutting is.
- •4. Find out whether the following statements are true or false.
- •6. Answer the following questions to the text.
- •1. Read the text and say why welding is widely used nowadays.
- •3. Answer the following questions to the text.
- •4. Translate the following sentences from Ukrainian into English.
- •1) Metalworking and metal properties
- •I. Copy the underlined words and word-combinations, translate them into Ukrainian and learn them.
- •III. Answer the following questions.
- •2) Factors affecting machinability
- •I. Copy the underlined words and word-combinations, translate them into Ukrainian and learn them.
- •II. Answer the following questions.
- •3) Metal-Cutting Machines. Lathe
- •I. Copy the underlined words and word-combinations, translate them into Ukrainian and learn them.
- •II. Define whether the following statements are true or false.
- •III. Fill in the following scheme using the text.
- •4) Borys Paton
- •I. Copy the underlined words and word-combinations, translate them into Ukrainian and learn them.
- •III. Give a short summary of the text in English in written or oral form.
- •1. Choose the right variant.
- •2. Change the words in brackets from Ukrainian into English.
- •3. Fill in the right word into the sentences.
- •4. Make up word-combinations with the following words. Translate them into Ukrainian.
4. Find out whether the following statements are true or false.
1. All machine-tools employed for removing metal are divided into five general categories.
2. Screw-machined parts can’t be made from bar stock.
3. Cutting tools held on turrets and tool slides are used for machining metal parts.
4. The workpiece placed on the spindle doesn’t rotate.
5. Cams and linkages designed for controlling cutting operations position the work, feed, hold in position and retract the tools.
6. Metal parts worked on machine-tools have smooth surfaces and high dimensional accuracies.
7. Finished parts are of symmetrical shapes.
5. Match the following parts of the sentences.
1. There are 2. They are 3. These machine-tools can perform 4. Finished parts possess 5. A lot of simple and complex shapes 6. Screw-machining is also used 7. Most engineering materials can be machined |
a) symmetrical shapes, high dimensional accuracies and smooth surfaces. b) for finishing operations. c) five general categories of machine-tools. d) can be produced on screw machines. e) turning, milling, grinding, boring, etc. operations. f) by machine-tools. g) lathes, drilling, boring, milling and grinding machines. |
6. Answer the following questions to the text.
1. When did the study of metal cutting start?
2. What is the purpose of metal cutting?
3. What machines are called “machine-tools”?
4. List the general categories of machine-tools.
5. What is the function of the spindle?
6. Where are cutting tools held?
7. By what means are cutting operations controlled?
8. List products produced on screw machines.
9. What are the general advantages of machining over other fabrication method?
Welding
Word list:
welding – зварювання to join – з’єднувати(ся) application – застосування, викори-стання heat – нагрівання pressure – тиск pressure welding – зварювання під тиском weld – зварний шов heat welding – зварювання нагріван-ням bolting – кріплення болтами riveting – заклепування manufacture – виробництво; вироб-ляти machinery/equipment – машини, устаткування purpose – намір, мета; призначення gas welding – газозварювання arc welding – електродугове зварюва-ння |
resistance welding – контактне зва-рювання laser welding – лазерне зварювання electron-beam welding – електронно-променеве зварювання flame – полум’я edges – краї filler – наповнювач welding rod – зварювальний електрод joint – точка з’єднання, стик to weld – зварювати(ся) flux – флюс fusible – плавкий to shield – захищати; покривати continuous supply – постійна подача electrical current – електричний струм to create – створювати to clamp – скріпляти; затискувати to touch – (до)торкатися; торкати(ся); стикатися |
Exercises to the subject: