Material Management
Gbogbo ọrọ náà
A student cuts every rail of a frame to the length shown on the drawing, assembles it, and finds the frame is 50 millimetres too small in both directions. Nothing was measured wrongly. The drawing gave the finished, visible length of each rail, and the tenons at each end have to be inside the joint, so every rail needed to be cut 25 millimetres longer at each end. The arithmetic was right and the material was managed wrongly, and that distinction is what this lesson is about.
Material management covers three things the specification names: planning the cutting and shaping of material to minimise waste, including the nesting of shapes and parts to be cut from material stock forms; how additional material may be removed by a cutting method or joint overlap; and using appropriate marking out methods, data points and coordinates, including reference points, lines and surfaces, templates, jigs and patterns. Underneath all of it sits the specification's own sentence about why any of it matters: the value of using measurement and marking out to create an accurate and quality prototype. This is designing and making principles content, examined in Section C of Paper 1.
Ebumnobi
- Cut materials efficiently and minimise waste
- The importance of planning the cutting and shaping of material to minimise waste e.g. nesting of shapes and parts to be cut from material stock forms.
- How additional material may be removed by a cutting method or joint overlap etc.
- Use appropriate marking out methods, data points and coordinates
- The value of using measurement and marking out to create an accurate and quality prototype.
- The use of data points and coordinates including the use of reference points, lines and surfaces, templates, jigs and/or patterns.
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Material Management. 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.
- Arranging parts on a sheet so that as little material as possible is wasted is called A. datum working. B. nesting. C. tolerancing. D. templating. Answer: B
- A shelf is housed 8 millimetres into each side of a cabinet whose internal width is 480 millimetres. What is the cut length of the shelf? A. 464 millimetres B. 480 millimetres C. 488 millimetres D. 496 millimetres Answer: D
- Parts 300 millimetres long are cut from a 2,400 millimetre board with a 4 millimetre kerf. How many complete parts are obtained? A. 6 B. 7 C. 8 D. 9 Answer: B
- Which tool is used to make a small dent so that a drill does not wander from the marked centre? A. A centre punch B. A marking gauge C. A scriber D. A try square Answer: A
- Marking every hole in a row as a running dimension from one edge rather than from the previous hole is done to A. save time. B. prevent errors from accumulating. C. reduce the kerf. D. allow a larger tolerance. Answer: B
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Material Management? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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