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Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/powder_metal_forming.html8 Sep 2001: filter, bearings). Economics. The machinery is expensive, and can cost well over £100,000. ... Tends only to be economic for large batches (50,000+) or processing high-strength alloys. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/blow_moulding.html8 Sep 2001: Economics. The production speed is limited by opening and closing the mould, so automation is normally used. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/vacuum_forming.html8 Sep 2001: Economics. Cycle time is limited by heating and cooling of the sheet. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/glass_moulding.html8 Sep 2001: Economics. Production rates and costs strongly depend on the type of process and the size of component. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/rapid_prototyping.html8 Sep 2001: Overview. Prototyping is the making of a test component before full manufacture begins. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/forging.html8 Sep 2001: Economics. Production rate is limited by the insertion and removal of the blank, so some form of automation is often used. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/sheet_forming.html8 Sep 2001: Some scrap is always produced and cannot be directly recycled. Economics. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/mechanical_cutting.html8 Sep 2001: Economics. If possible, avoid cutting! A surprising number of designs involve a cutting process followed by a joining process. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/friction_welding.html8 Sep 2001: Economics. Basic equipment costs around £10,000, but automation can increase this significantly. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/composite_forming.html8 Sep 2001: cured). Economics. There are few composite forming processes, and the decision of which to use is normally determined first by shape and type of fibre (chopped or continuous), and then by -
Young's Modulus - Density
www-materials.eng.cam.ac.uk/mpsite/interactive_charts/stiffness-density/basic.html7 Sep 2001: Young's modulus measures stiffness and is a material constant, i.e. it is the same whatever the size of the test-piece. -
Process Encyclopaedia
www-materials.eng.cam.ac.uk/mpsite/process_encyc/non-IE/transformation_hardening.html8 Sep 2001: As a result, a self-quench is usually sufficient. The equipment is very expensive and not economic for large surfaces, but automation is straightforward and very precise control can be achieved. -
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www-materials.eng.cam.ac.uk/mpsite/short/OCR/tools/tools.pdf11 May 2000: Design a test to rank various materials inorder of their wear resistance. ... Tip: use a very strong materialto sli de against your test materials. -
ANSWERS TO QUESTI ONS AND ‘ TRY I T ...
www-materials.eng.cam.ac.uk/mpsite/short/OCR/answers.pdf5 Sep 2001: important and could be assessed by a tensile test to measure elastic deformation before failure. ... supported beam of the test material (un-notched, or notched underneath on the tensile edge) – by. -
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www-materials.eng.cam.ac.uk/mpsite/short/OCR/helmets/helmets.pdf11 May 2000: Devise a test to compare the impact resistanceof different polymers like polystyrene foam,PMM A (also known as Perspex) andpol yethylene. -
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www-materials.eng.cam.ac.uk/mpsite/short/OCR/bags/bags.pdf11 May 2000: Devise a test for comparing the tearresistance of different fabrics. It is onlynecessary to rank the fabrics in order of tearresistance, rather than to get a numericalvalue for each. -
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www-materials.eng.cam.ac.uk/mpsite/short/OCR/kitchen/kitchen.pdf11 May 2000: Design a test to see how long polymerscan be held above their maximumservice temperature. -
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www-materials.eng.cam.ac.uk/mpsite/short/OCR/ropes/ropes.pdf19 May 2000: Coll ect samples of many different typesof rubber bands and test the amount ofelongation before fail ure. -
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www-materials.eng.cam.ac.uk/mpsite/short/OCR/walking_aids/walking_aids.pdf11 May 2000: It isnot economic to use standard processes such as turning –so another approach is needed.
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