Specialist Techniques And Processes
Gbogbo ọrọ náà
There are only three things you can do to a material. You can take some away, you can add some on, or you can push what is there into a new shape. Every process in a workshop and every process in a factory is one of those three, and the specification uses exactly those headings: wastage, addition and shaping. Learn them as three families and thirty processes become manageable.
This is the largest topic in the specialist technical principles and it earned three questions on the specimen paper, worth thirteen marks between them. You will learn how to use measurement and reference points, templates, jigs and patterns; the wastage, addition and shaping processes by name and by what each is for; how products are made to a tolerance by manufacturing to minimum and maximum measurements; the application and use of quality control, which the specification defines differently for each material area; and the commercial processes for papers and boards, timbers, metals and polymers. This is specialist technical principles content, examined in Section B of Paper 1.
Ebumnobi
- The use of production aids
- How to use measurement/reference points, templates, jigs, and patterns where suitable
- Tools, equipment and processes
- A range of tools, equipment and processes that can be used to shape, fabricate, construct, and assemble high quality prototypes, as appropriate for the materials being used including: wastage, such as:
- die cutting
- perforation
- turning
- sawing
- milling and routing
- drilling
- cutting and shearing
- addition, such as:
- brazing
- welding
- lamination
- soldering
- 3D printing
- printing
- shaping such as:
- vacuum forming
- creasing
- pressing
- drape forming
- bending
- folding
- blow moulding
- casting
- injection moulding
- extrusion.
- How products are made to a tolerance
- Manufacturing to minimum and maximum measurements.
- The application and use of quality control
- Papers and boards (registration marks).
- Timber based materials (dimensional accuracy using go/ no go fixture).
- Metal based materials (dimensional accuracy using measuring equipment).
- Polymers (dimensional accuracy by selecting correct laser cutting settings).
- Commercial processes
- Papers and boards (offset lithography and die cutting).
- Timber based materials (routing and turning).
- Metal based materials (milling and casting).
- Polymers (injection moulding and extrusion).
Maapụ uche
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Akwụkwọ Ọmụmụ
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Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Specialist Techniques And Processes. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- Which one of the following is an addition process? A. Blow moulding B. Brazing C. Milling D. Shearing Answer: B
- In vacuum forming, the softened sheet is forced onto the mould by A. a hydraulic ram. B. atmospheric pressure. C. the weight of the sheet. D. an injection screw. Answer: B
- A dimension is given as 40 millimetres with a tolerance of plus 0.3 and minus 0.2. What is the total tolerance? A. 0.1 millimetres B. 0.2 millimetres C. 0.3 millimetres D. 0.5 millimetres Answer: D
- Registration marks are used as a quality control method for A. metal based materials. B. papers and boards. C. polymers. D. timber based materials. Answer: B
- Which process produces a continuous length of constant cross section? A. Blow moulding B. Die casting C. Extrusion D. Pressing Answer: C
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