F. 1 Design and Technology Woodwork Try Square Try square is for woodwork while Engineer’s square is for metalwork. They are used for making and testing.

F. 1 Design and Technology

Woodwork

Try Square

• Try square is for woodwork while Engineer’s square is for metalwork.

• They are used for making and testing right angles.

Try Square

• They are also used to test squareness and check the internal and external angles of a workpiece.

Marking Knife

• It is used for making cut lines on wood.

• It is used to cut the fibres of a wood surface before sawing and chiselling.

Marking Knife

• Always keep the flat edge vertically close to the try square or steel rule to ensure that the lines are marked accurately.

Marking on wood

Tenon Saw

• It is used for making straight cuts in small pieces of wood such as sawing tenons.

• The steel back is used to stiffen the blade so as to make straight cuts easily.

Tenon Saw

• Always put it back in the tool box after use to prevent unnecessary damages caused by the saw teeth.

Bench Hook

• It is used to support wood for sawing on the bench easily.

• It is also used to protect the bench top during sawing or chiselling.

Sawing on wood

• Choose the suitable saw for cutting. Tenson saws are commonly used.

• Use a marking knife to cut the wood fibre.

• Hold the workpiece by a bench hook.

Sawing on wood

• Pull the saw backward to start the cut.

• Apply force on the forward strokes only.

• Release pressure and slow down the speed when the cut to be finished.

Planes

• It is used for shaping rough wood surfaces to the required size.

Planes

• Do not touch the cutting edge of blade, otherwise it will hurt you.

Planes

• When using the plane, you should follow the correct steps to adjust the plane: (1) Hold the plane for adjust. (2) Adjust the suitable depth of the cut. (3) Make suitable lateral adjustment.

Planes

Rasps

• Rasps are used for rough shaping of wood or other soft materials.

• The common shapes of rasps are half-round, flat and round.

Rasps

• The rasp with a narrow head can be used for shaping different works.

• The common lengths of rasps are from 200mm to 300mm.

Rasps

Test

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5 6

MachineVice

• It is used to hold the workpiece for drilling.

• For light drilling, the vice can be held by hand.

• For heavy work, it must be bolted on the table of a drilling machine.

Hand Vice

• It is used to hold workpieces for drilling.

• It is especially useful when you are drilling sheet metal or acrylic sheets.

Drilling Machine

• It is used for drilling holes in wood, metal or plastics.

• The maximum size of the chunk is normally 13mm in diameter.

• Cutting lubricant is essential in drilling holes in most metal.

Drilling Machine

• Safety Notes• Select suitable speeds

for different materials and drill sizes.

• Ensure the drill is securely and properly held in the chuck.

• Remove the chunk key before switching on.

Drilling Machine

• Wear goggles to protect your eyes.

• Clamp the workpiece with a machine vice or hand vice when necessary.

• The chunk must be covered by a chunk guard during drilling.

Cutting inside the wood

• Drill some holes first.

Cutting inside the wood

• Disconnect the blade from the coping saw, then connect the blade through the hole in the wood.

Finishing

• The abrasive for wood is glasspaper.• The grade from coarse to fine is 2, 1, 0.• It can be used for smoothing plastics.

Joining

• PVA Glue• It is a white glue

widely used for joining paper and light woodpieces. It is water soluble and fairly strong.