SOLE Lesson
How are timbers and boards selected and processed for commercial products?
Disadvantages
Sharp tools needed to cut
Man made wood can be better than pure wood because man made wood has no defects. This makes man made wood more water resistant.
What is CNC machinery?
Not easy to join together
CNC machining is a manufacturing process in which pre-programmed computer software dictates the movement of factory tools and machinery.
Needs finishing
Properties for flat pack
Numerical control (also computer numerical control, and commonly called CNC) is the automated control of machining tools (such as drills, lathes, mills) and 3D printers by means of a computer
The process can be used to control a range of complex machinery, from grinders and lathes to mills and routers.
With CNC machining, three-dimensional cutting tasks can be accomplished in a single set of prompts.
Don't warp and twist
What is the differences between ‘mechanisation’ and ‘automation’?
Automatic transplanters are an example of mechanization. But, true automation encompasses more than mechanization.
Automation involves the entire process, including bringing material to and from the mechanized equipment.
Mechanization is normally defined as the replacement of a human task with a machine.
Advantages of CNC. CNC machines are more accurate there for consistent projects. Also CNC machines are more safe than made made work. Since the CNCs are fast it boosts production volume.
Stability
What disadvantages would the introduction of CNC machinery present to a skilled workforce?
Do not stay flat if unsupported
Advantages
Plywood,chipboard,particle board
- CNC machines can be used continuously 24 hours a day, 365 days a year and only need to be switched off for occasional maintenance.
- CNC machines are programmed with a design which can then be manufactured hundreds or even thousands of times. Each manufactured product will be exactly the same.
- Less skilled/trained people can operate CNCs unlike manual lathes / milling machines etc.. which need skilled engineers.
- CNC machines can be updated by improving the software used to drive the machines
Diadvantages
Cheaper to transport
- CNC machines are more expensive than manually operated machines, although costs are slowly coming down.
- The CNC machine operator only needs basic training and skills, enough to supervise several machines. In years gone by, engineers needed years of training to operate centre lathes, milling machines and other manually operated machines. This means many of the old skills are been lost.
- Less workers are required to operate CNC machines compared to manually operated machines. Investment in CNC machines can lead to unemployment.
- Many countries no longer teach pupils / students how to use manually operated lathes / milling machines etc... Pupils / students no longer develop the detailed skills required by engineers of the past. These include mathematical and engineering skills.
Design factors
Aesthetics
Ergonomics
Material
Manufacturer
Sustainability
Protection
Packaging and assembly
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Mechanisation is where the operator uses machines to make products. For example, a man using a nail gun to nail wood tog ever.