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Workshop Tools Case Study
www-materials.eng.cam.ac.uk/mpsite/short/OCR/tools/default.html4 Sep 2001: Design a test to rank various materials in order of their wear resistance. ... Tip: use a very strong material to slide against your test materials. -
Helmet Case Study
www-materials.eng.cam.ac.uk/mpsite/short/OCR/helmets/default.html4 Sep 2001: Devise a test to compare the impact resistance of different polymers like polystyrene foam, PMMA (also known as Perspex) and polyethylene. -
Kitchen Utensils Case Study
www-materials.eng.cam.ac.uk/mpsite/short/OCR/kitchen/default.html4 Sep 2001: Design a test to see how long polymers can be held above their maximum service temperature. -
Bags Case Study
www-materials.eng.cam.ac.uk/mpsite/short/OCR/bags/default.html4 Sep 2001: Devise a test for comparing the tear resistance of different fabrics. -
Ropes Case Study
www-materials.eng.cam.ac.uk/mpsite/short/OCR/ropes/default.html4 Sep 2001: 1,140. 616. Alloy Steel. 210. 7,800. 1,330. Collect samples of many different types of rubber bands and test the amount of elongation before failure. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/milling.html8 Sep 2001: Economics. Milling machines vary in price from £1,000 to £1,000,000. Milling is generally a very slow way to produce a component - but it can be economic for prototyping -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/sintering.html8 Sep 2001: Economics. The machinery is expensive, and can cost well over £100,000 for HIPing. ... Because there is little competition, can be economic for small batches (1,000+) - although still not cheap! -
Walking Aids Case Study
www-materials.eng.cam.ac.uk/mpsite/short/OCR/walking_aids/default.html4 Sep 2001: It is not economic to use standard processes such as turning - so another approach is needed. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/rolling.html8 Sep 2001: Economics. For making stock items, rolling has few competitors.For this reason, it is usually performed by the foundries before passing on to customers for further processing. ... For long shaped sections, rolling is the only viable option for larger -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/arc_welding.html8 Sep 2001: However, the production rate is slow so it is only economic for one-off jobs, repair work and difficult access situations. ... Joining of sheet (e.g. car body panels) is usually more economic by other welding processes such as spot welding. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/soldering.html8 Sep 2001: Economics. Equipment is generally low cost, except where automation is used. ... Wave soldering is the most economic means of soldering large batches of printed circuit boards. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/metal_extrusion.html8 Sep 2001: Cold extrusion is possible for some metals giving better properties. Economics. ... Usually only economic for several thousand metres. Typical products. Tubing. aluminium window frames. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/die_casting.html8 Sep 2001: Economics. The machinery is expensive, and can cost well over £100,000. ... Because of the high capital cost, the process is only economic for batches of 100,000+. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/sand_casting.html8 Sep 2001: Economics. The basic equipment cost is low - from £500 to £3,000; automation and higher temperature furnaces can increase this a lot. ... The labour intensive nature of the process mean it is usually only economic for small batches, although dedicated -
Energy - Cost
www-materials.eng.cam.ac.uk/mpsite/interactive_charts/energy-cost/basic.html7 Sep 2001: Simple Questions. Why is it economic to recycle aluminium cans but less so for steel ones? ... Why will new reserves of minerals/oil which are not now economic to mine become economic in the future? -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/polymer_extrusion.html8 Sep 2001: Near-net-shape process, only the ends of the extrusion are wasted. Economics. ... Because of the high costs, it is usually only economic to produce lengths over 10km - although there is little competition for many of the possible shapes. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/lost_wax_casting.html8 Sep 2001: Economics. The production cycle is slow: usually only 1-5 castings can be made an hour, depending on the size. ... Although the setup costs are low, the low manual production rate means that only batch sizes of up to 50 are economic; this can rise to a -
OCR case studies introduction
www-materials.eng.cam.ac.uk/mpsite/short/OCR/introduction.html5 Sep 2001: Devising simple material tests is an important aspect of appreciating which properties are important in a design, and the challenges in obtaining meaningful, relevant material data. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/compression_moulding.html8 Sep 2001: Economics. Cycle time is limited by heat transfer, or curing time and is usually over 1 minute. ... The low production rate means that it is only usually economic for batch sizes in the tens of thousands. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/joining.html8 Sep 2001: In addition to these processes, there are a variety of "hot processes" such as welding and brazing which can often provide stronger and more economic joints for metal parts.
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