Learning aim AKnow about engineering

processes used to produce modern

engineered products

BTEC First Engineering

Bigger picture: -

Know about engineering processes used to produce modern engineered products

Learning objectives: -o Be able to explain what is meant by the term secondary

machining o Describe the machining process and correct health and

safety procedures to be followed when turning, milling and drilling

Success criteria: - o Provide a definition for different machining operations o Correctly identify the sequence of machining for turning, milling and drilling.

The manufacture of engineered products or parts often requires the removal of material and some form of shape change.

This is known as secondary machining or ‘forming’.

Traditional secondary machining techniques fall into 3 main groups.

Machining processes:

Categories of metals . . . There are 3 main types of secondary machining techniques as an Engineer student you need to be aware of:

o Turning

o Milling

o Drilling

Turning . . .• Turning involves the use of the lathe

to produce a given shape, usually cylindrical.

• Lathes have one thing in common: the work piece is held in a chuck and rotated while being machined to shape and size using a cutting tool.

Lesson task:

Look at the common machining operations for lathe work

Match up the operation with the description:

Operation:

Facing off

Drilling

Parallel turning

Taper turning

Parting off

Description:

A process used to cut off the work piece to the required length

Removing material from the outer diameter of the work piece while maintaining the same size along its length

Removing material from the end of a work piece to leave flat or square surface

Removing material from the inside of a work piece using a drill bit

A process used to create a conical shape by feeding a tool at an angle to the length of the work piece

Non - Ferrous . . .

There are many useful metals and alloys that do not contain iron. Most of the common non-ferrous metals have good corrosion resistance and do not require surface finishes. Common non-ferrous metals include:o Aluminium o Titanium o Zinc o Pure copper o Bronze + brass

Lesson task:

Look at the common non-ferrous metals

Read each property carefully and decide on the type of metal and what they would be used for.

METAL PROPERTIES EXAMPLES OF WHAT IT IS USED FOR?

Metals used within the manufacture of a bicycle:

Pedals:Material –

Reason –

Frame:Material –

Reason –

Wheel rim:Material –

Reason –

Spokes:Material –

Reason –

Chain: Material –

Reason –

Brake lever: Material –

Reason –

Metals Revision questions . . .

1. What type of metal contains iron?

Ferrous

2. What is a common use for stainless steel?

Sinks, kettles, medical equipment, knives and forks.

3. A mixture of 2 or more metals is called a?

Alloy

4. What type of metals do not contain iron?

Non ferrous

5. Which metal is the most commonly occurring material in the earths crust?

Aluminium

6. True or false – titanium is stronger than aluminium?

True

6. What metal is an alloy of copper and tin?

Bronze

Learning objectives: -

o Be able to explain what is meant by the term ferrous and non-ferrous metals

o Describe the properties and typical uses of ferrous and non-ferrous metals

How confident do you feel in relation to your learning within

today’s lesson?

Which Blob are you and why?

Do you feel you have achieved the learning objectives?