DT Flashcards
What is the purpose of a sliding bevel tool
To measure and copy specific angles - can be changed and fixed
What are the tree types of chisel
Bevel- for rough chopping
Firmer- has strong blades to remove large pieces of wood
Paring- for shaving thin slices of wood
What is the general purpose of a chisel?
Used in shaping wood by cutting it with a sharp blade and hammer
What are two examples of temporary joining techniques?
Nuts+bolts
Screws
What are two examples of permanent joining?
Welding
Adhesive joining
What are the three types of drill bit
Twist drill - for small holes
Flat bit - for medium sized holes
Hole saw - for large circles or holes
What is injection moulding
Where granular plastic is heated and injected into a mould
What is a rebate
A step shaped recess cut along the edge or into the face of a piece of wood
What is a groove
A long narrow cut in a hard material
What are the two causes of webbing
The moulds are two close together
The moulds are too high
What happens to steel if more carbon is added
It becomes more brittle but also more strong
What is a T-halving joint
A lap joint in the centre of a piece of wood making a T
What is anodising
An electrochemical process which converts a metal surface to a metal oxide which is stronger and can be dyed
What are the properties of oak wood
It’s durable
It has an attractive grain
Good water resistant properties
Stains and polishes well
What is a Chamfer
A cut away to create a sloping edge on a material
What tools are used for marking out metal
Scribe - to mark
Steel ruler
Odd legged callipers - to mark parallel lines
Engineers square - for marking out 90* angles
Tinsnips - for cutting thin sheets of metal, like scissors
What are the advantages to laser cutting?
Precise
Can cut complex shapes
Quick
Leaves a smooth edge
What is the process of laser cutting
Create a design in CAD using blue and red lines to indicate where the laser cutter should cut or etch
Send the design to the laser cutter
Make sure the bonnet is down to ensure good ventilation within the laser cutter
What does CAM stand for
Computer aided manufacture
What is a plane?
A hand tool for removing wood
How can you protect wood being held in an engineers vice?
Scrap pieces of wood on either side
How do you prepare wood for a finish?
Sand first with a rough grain and then a finer one
What is the metal forming process?
Where molten metal is poured into a mould
