Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

Task 1: Task 1: Review cut-off machines Review cut-off machines learnt last time. learnt last time.

(1) (1) Are the lathes used in a wide range of Are the lathes used in a wide range of applications, and a broad range of applications, and a broad range of

materials?materials?

YesYes

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

(2). How do rigid machine tools remove material from a rotating work piece ?

via the movements of various cutting tools, such as tool bitsand drill bits(3). While using a lathe, what cautions

should you take great care ?

two things

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

Task 2. Lead in

Today we are going to read something about the milling machine. Since you have taken basic principle of mechanics, I am sure you are familiar with the picture below.

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

Task 3. Fast reading on Milling MachineMilling Machine

- Scan the text quickly to find out which of these words are mentioned in the text?

rotating tool; digital scales; accuracy; work-piece;

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

Task 4. Group task: 4 students a group to discuss the text and make some questions according to the passage.

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

Task 5. Group Act out. One representative from each group comes to the front and ask questions and then get the answer from other groups.

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

Task 6. Some questions and answer on the text orally.

a. What is a milling machine?

b. Milling machines exist in two basic forms: What are they ?

It is a machine tool used for the shaping of metal and other solid materials.

horizontal and vertical

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

d. Milling machines exist in two basic forms: What are they ?

It is used to cool and lubricate the cut, and to sluice away the resulting swarf

horizontal and vertical

c. What is the function of cutting fluid?

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

Task 7.Read the text again and then complete the following sentences.

a. Does the vertical milling machine has high

processing speed?

b. What cuts material in the milling machine?

No, its speed is low

a rotating tool

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

c. A vise is used for _________ of the material.

fixing

It can be accurately adjusted at the x-, y- and z- axes.

d. Can the table of the milling machine be adjusted ?

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

Task 7. Complete the following exercise orally a. The lathe is one of the ___________ most well used by machining.

rotated

machine tools

b. The lathe is switched on and the chuck is _________.

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

c. A beginner of a lathe must operate with low ___________, small cutting depth and low sending speed.

rotating speed

processing

d. The sending speed of the tool also affects to the __________ speed and the roughness. of surface.

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

Task 8: Lecturing on some technical words: machine tools; chuck; rotating speed; accurate; scraps; rotating speed; sending speed

Unit 7 Basic Operation of a Milling Unit 7 Basic Operation of a Milling MachineMachine

Task 9 Homework:

a.a.Review basic operation of Review basic operation of a a

milling machinemilling machineb. Preview weldingb. Preview welding