Tài liệu Unit 6: Laser pptx

Identity drilling diamonds —— SP3C€ - treatingdamaged light shows targets communication tissue cutting complex information welding _ surfacing measuring aligning - Designed by Duong

Unit 6 Laser

01/19/14

Complete this table of laser applications using information from the text

opposite You may also add any applications you know of which are not

included in the text

Identity drilling diamonds —— SP3C€ - treatingdamaged light shows

targets communication tissue

cutting complex information

welding _ surfacing measuring

aligning -

Designed by Duong Duc Minh

01/19/14

Language study

Study these examples of laser applications:

1 Laser beams can be used to measure and align structures

2 They can be used for drilling diamonds

3 They can be used for light displays

We can describe applications with used to + infinitive or used for + -ing or noun

01/19/14

Word study

We can use adjectives to describe an object in greater detail For example:

steel stainless steel

We can also use nouns For example:

a motor an air motor

steel carbon steel

gears titanium gears

Many relationships are possible in noun compounds For example:

an air motor a motor which uses air

carbon steel steel which contains carbon

4 Designed by Duong Duc Minh

01/19/14

Task 5

Put each of these examples in the correct column

carbon blocks

aluminium alloy

carbon fibre

a gas burner

roller bearings

a circuit board

a plastic pipe

magnesium alloy

a power tool

a ball bearing

a concrete beam

a diesel boat

a spring balance

a plastic tube steel sheets

uses

01/19/14

Answers

Note that some compounds can be placed in more

than one column

contains

a gas burner carbon blocks

roller bearings aluminium alloy

a ball bearing carbon fibre

aspring balance magnesium alloy

a power tool a plastic pipe

a diesel boat a concrete beam

a plastic tube steel sheets

carbon blocks aluminium alloy carbon fibre

roller bearings

a circuit board

magnesium alloy

a ball bearing

a spring balance

Designed by Duong Duc Minh

01/19/14

What new relationships can you find in the examples below? Rewrite e

compound to show the relationship For example:

a foot pump a pump which is operated by foot

a ribbon cable a cable which is like a ribbon

a gear lever a lever for operating gears

1 chain wheel 6 college lecturer

6 a lecturer who works in a college

7 aclip for the toes

8 athermostat which controls a boiler

9 ahelmet for safety

1Ö an engineer concerned with aircraft

01/19/14

Writing Describing a process, 1: sequence

When we write about a process, we have to:

1 Sequence the stages

2 Locate the stages

3 Describe what happens at each stage

4 Explain what happens at each stage

In this unit, we will study how to sequence the stages

8 Designed by Duong Duc Minh

01/19/14 Consider these stages

CNIOCO

— The drum is filled with water

The water is heated to the right temperature

Soap is added

The drum is rotated slowly

The dirty water is pumped out

Clean water is added

The drum is rotated much faster and the water pumped out

The clean clothes are removed

Instead of numbers, we can show the correct order using sequence words

First the drum is filled with water

Then the water is heated to the right temperature

Next soap is added

After that, the drum is rotated slowly

Next the dirty water is pumped out

Then clean water is added

After that, the drum is rotated much faster and the water pumped out

01/19/14

Study this diagram It shows an extruder for forming plastic pipes Describe

the extruder

Plastic granules

ee

Rotating

screw Heaters

| | F | |

LLG

SE |

into an extrusion die Heaters

Die

10 Designed by Duong Duc Minh

01/19/14

The extruder consists of a hopper a rotating screw,

heaters and a die First the plastic granules are

mixed and placed in the hopper Next the rotating

screw forces the plastic past heaters After that, the

plastic melts Then the hot plastic is forced through

the die to form a continuous length of pipe Finally

the pipe is cooled and cut to suitable lengths

01/19/14

Design Engineers, Development Engineers

Buyers, and Stock Controllers

Laser cutting

Design is not restricted by what conventional

tools can produce

Yes — plastics wood, rubber, etc

Cannot cut nen-metals thicker than +0 mm

stainless steel thicker than 10mm, and carbon

steel thicker than 13mm Shapes which

require greater table movement than the parameters given cannot be achieved

Press tools do not have to be manufactured to

produce the shapes required

12 Designed by Duong Duc Minh