Unit_6

ENGLISH FOR AUTOMOBILE ENGINEERING UNIT 6 INDUSTRIAL PROCESSES AND PETROL ENGINES Lecturer: Lang Van Thang Presentation Read the text and label the flow diagram with sentences a, b, c and d: Die casting is a common process in the engineering industry. It is used to produce many machine components. There are two main processes: hot chamber die casting and cold chamber die casting. Cold chamber die casting is a suitable casting process for metals with a high melting point, such as aluminum. For some metals with a low melting point, such as a zinc alloy, a process called hot chamber die casting is used. For example, a carburetor body is produced by this method. There are three main stages in the process. In the first stage, the dies are closed. Then the injection plunger is forced downwards and the molten metal is forced into the dies. Finally, in the third stage, the dies are opened in order to remove the carburetor body. Presentation a. The dies are opened. b. The metal is forced into the dies. c. The plunger is forced downwards. d. The dies are closed. Practice 1 Read the text again to complete the table 6.1: First, the dies ………….. ……………. ……………. …………….. downwards. …………… is forced …………... Finally, …………… ……………. Practice 2 Use the first text to complete the second one: Figure 6.2: Steam engine, piston and crank the piston linear movement the crank rotary movement In a steam engine, the piston is driven backwards and forwards. This type of movement is called linear movement. In order to convert the linear movement to rotary movement, the piston is connected to a crank by a connecting rod. ... - tailieumienphi.vn