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1. Answer the following questions.

  1. What technologies used to fabricate metal products can you name?

  2. When did the mankind start to use metalworking?

  3. What method became available with the advent of copper smelting?

  4. What is strain hardening?

  5. What process can bring about strain hardening?

  6. Why was the Iron Age so delayed?

  7. How did the tilt hammer get its name?

  8. What famous inventor contributed much to the art in metalworking processes?

  9. What is the principle of work of the high-speed steam hammer?

  10. What new types of equipment were developed in the 20 century?

2. Match the events with the correct dates.

    1. The earliest records of metalworking a) the13th century

in the Middle East

    1. The advent of copper smelting b) 1480

    2. The beginning of the Bronze Age c) around 4000 B.C.

    3. The development of the tilt hammer d) the 17th century

    4. The designing of a machine for the e) around 8000 B.C.

rolling of lead

    1. The appearance of large mills f) until the middle of the

18th century

    1. The use of water wheels in the mills g) the 20th century

    2. The industrial revolution h) the 19th century

    3. Rapid development of rolling i) the end of the 18th century

    4. The development of new materials j) around 2500 B.C.

with special properties

3. Find in the text the English equivalents of the following words / expressions.

A: загрязнения, ковка, штамповка, выплавка меди, деформационное упрочнение, сплав, олово, очищение железной руды.

B: рычажный молот, ковка полос и листов, плечо рычага, кузнец.

C: прокатный стан, с целью производства монет, материалы на основе железа.

D: удовлетворение требований, большая мощность, огнестрельное оружие, побуждали к совершенствованию, в существенном количестве.

E: свойства, применение, винтовой пресс, имели преимущество, диапазон, широко распространенные малоуглеродистые стали, повышение эффективности.

4. Write a summary of the text. Drawing

Drawing consists of pulling metal through a die. One type is wire drawing. The diameter reduction that can be achieved in one die is limited, but several dies in series can be used to get the desired reduction.

Sheet metal forming

Sheet metal forming (штамповка листового металла) is widely used when parts of certain shape and size are needed. It includes forging, bending and shearing. One characteristic of sheet metal forming is that the thickness of the sheet changes little in processing. The metal is stretched just beyond its yield point (2 to 4 percent strain) in order to retain the new shape. Bending can be done by pressing between two dies. Shearing is a cutting operation similar to that used for cloth.

Each of these processes may be used alone, but often all three are used on one part. For example, to make the roof of an automobile from a flat sheet, the edges are gripped and the piece pulled in tension over a lower die. Next an upper die is pressed over the top, finishing the forming operation (штамповку), and finally the edges are sheared off to give the final dimensions.