- •Кафедра іноземних мов
- •Кафедра іноземних мов
- •Unit 1 (Total Score – 76 points) working sheet metal
- •Working Sheet Metal (Score – 6 points)
- •(Total Score – 76 points) unit 2 (Total Score – 71 points) rivets and riveting
- •I. Read and memorize the following words: (Score – 41 points)
- •Rivets and Riveting
- •I I. Match the words in a with the definition in b (Score – 4 points)
- •Unit 3 (Total Score – 64 points) forging processes ( I )
- •Forging Processes (I)
- •Unit 4 (Total Score – 67 points) forging processes ( II )
- •I. Read and memoraze the following words: (Score – 31 points)
- •Forging Processes (II) (Score – 6 points)
- •Beaten Metal work (Score – 6 points)
- •III. Match the words in a with the definition in b (Score – 3 points)
- •Part II. Texts for reading
- •The Importance of Forging in Machine Building
- •Uniт 2 (Total Score – 18 points
- •Classification of Steels
- •Unit 3 (Total Score – 14 points)
- •Unit 4 (Total Score – 16 points)
- •Unit 5 (Total Score – 15 points)
- •Unit 6 (Total Score – 36 points)
- •Safety Engineering in Forge Furnace Operation
- •Unit7 (Total Score – 21 points)
- •Heating by Electric Current
- •Unit8 (Total Score – 17 points)
- •Drop-Forging Methods
- •Uniт 9 (Total Score – 15 points)
- •The Drop-Forging Technology
- •(Total Score – 15 points) unit 10 (Total Score – 30 points)
- •Forging Non-Ferrous Metals and Their Alloys
- •Unit 11
- •1) Для чого поковки із сталі підвержені тепловій обробці;
- •2) Що відбувається з поковкой під час охолодження;
- •3) Назвіть методи охолодження поковок. Cooling Forgings
Unit 5 (Total Score – 15 points)
1. Прочитайте наступний текст, намагайтесь його зрозуміти.
Types of Forge Furnaces (Score – 6 points)
Forging shops process a great variety of work, both as regards weight and shape for this reason, there are very many different designs of forge furnaces.
1. As regards heating, furnaces are classified into box-type, semicontinuous and continuous furnaces. In box-type furnaces the temperature is the same in the entire working chamber, but in continuous furnaces it varies, rising from the beginning of the working chamber to a higher temperature at the exit. The steel, charged into the furnace from one end, travels slowly along the hearth from the low - temperature zone to the high-temperature zone, against the direction of the gas flow, and is discharged from the opposite end of the furnace at the required high temperature. In these furnaces steel is heated gradually and continuously, whence their name - continuous furnaces.
Semi-continuous furnaces are, in effect, identical with ordinary continuous furnaces, only they are built with a shorter low-temperature preheating zone; steel can be heated more rapidly in these furnaces than in ordinary continuous furnaces.
2. As regards charging and discharging methods, furnaces are further classified into continuous and periodically operated furnaces, so called batch-type furnaces. In furnaces of the latter type, the steel is charged through the charging door on to the furnace hearth, where it remains without being moved during the entire heating period; and, as a rule, it is discharged from the furnace through the charging door. An example of a batch-type furnace is the box-type furnace.
In continuously operated furnaces, the steel travels along the furnace hearth during the entire heating cycle. In these furnaces the steel can be made to travel by various means. If rectangular ingots or stock are being heated in a continuous-type furnace, they are moved along the furnace hearth with the aid of a pusher. Round stock, however, will be heated in a furnace built with an inclined hearth, along which the stock can be rolled. Such furnaces are called roller-hearth furnaces.
In addition to the above-mentioned continuous-type furnaces, the following types of furnaces are also employed: rotary, plate, conveyor furnaces, etc.
All these belong to the group of mechanized furnaces.
3. Depending on the type of fuel burnt in the furnaces, they are classified as: coal-fired, gas-fired, masout-fired and pulverised fuel-fired furnaces.
4. As regards heat sources, furnaces can be classified as flame and electric furnaces. In flame furnaces the heat is generated by the combustion of fuel whereas in electric furnaces the heat is generated by electric power.
5. As regards the method of utilizing the heat escaping together with the products of combustion, forging heating furnaces are classified as recuperator or regenerator-type furnaces.
П. Дайте відповіді на питання.
Are there many different designs of forge furnaces?
How many types of forge furnaces are these in the forging practice?
What is the difference between box-type furnaces and continuous
furnaces?
What furnaces are identical in their design?
What can you say about furnaces, which belong to the group of mechanized furnaces?
П. Складіть план тексту. (Score – 6 points)
Ш. Коротко передайте зміст тексту українською мовою. (Score – 3 points)
(Total Score – 15 points)