Techniques for quantity production Flashcards
How can measurement be transferred onto timber?
Using a ruler and a pencil or marking knife.
What is name of the starting point where all measurements are taken from?
Datum lines
Draw the face side and face edge of timber?
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Why are face sides and face edges used?
Used for marking out
What does a try square do?
Mark a 90° line to the edge.
What does a try square look like?
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What does a marking gauge do?
Produce a line parallel to an edge
What does a marking gauge look like?
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What does a mortise gauge do?
Produce a double line parallel to an edge
What does a mortise gauge look like?
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What does a mitre square do?
Mark a 45° line to the edge.
What does a mitre square look like?
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What does a sliding bevel do?
Be set to produce any angles
What does a sliding bevel look like?
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Define Jig
A 3D device used as an aid to production
What does a jig do?
A jig is a specially made device used to assist production by speeding up the process and improving both accuracy and consistency.
Give an example where a jig is used.
Drilling
What does a fixture do?
Fixtures hold different parts of a timber product together while they are being glued or assembled.
What does a template do?
- Templates speed up production when several identical components need to be cut.
- Templates can be made from paper, card or more resistant materials such as MDF or plywood.
- They can either be drawn around or used as a profile to be cut around.
What does a pattern do?
A pattern is a 3d version of a template
Give an example where a pattern is used.
Wooden patterns are used in the process of casting aluminium.
What are sub-assemblies?
A sub-assembly is a completed sub-section that forms part of the main product
Give an example where sub-assemblies are used.
When making a batch of wooden tables, a sub-assembly of frames would be made before the tops are fitted.
What does computer-aided manufacture do?
- All CAM begins with a computer-aided design (CAD) program
- Laser cutters can be used to cut and etch thin sections of timber
- Thicker sections of Timber can be cut shaped with a 3D router.
What is quality control?
-Quality control of timber-based products involves the checking and testing of parts ensure that they are accurately produced and free from errors.
What defects of Timber should quality control check for?
Timber should be checked for defects such as splits, knots, bowing, cupping and twisting.
Define tolerance
A tolerance is given as a maximum and minimum that a component can be.
Give an example of tolerance.
A chair leg that is to 600mm long could be given a tolerance of 0.5mm. This would mean it could be any size between 599.5 mm and 600.5 mm and still be accepted.
Define tessellation in a manufacturing process
The arrangement of components to minimise waste.
What is process/arrangement is used to efficiently minimise waste?
Tessellation
