Material Management
Overzicht
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.
Doelstellingen
- 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.
Mindmap
Dit onderwerp is in kaart gebracht zodat je ziet hoe de ideeen samenhangen.
Open de mindmap in de app
Lesnotitie
Volledige lesnotitie beschikbaar in de Green Bridge-app
Installeer de Green Bridge CBT-app op je telefoon of computer voor de volledige IGCSE-bibliotheek: examens uit voorgaande jaren, correctiemodellen, mindmaps, flashcards en audiolessen.
Lesevaluatie
Gefeliciteerd met het voltooien van de les op Material Management. Nu je de sleutelconcepten en ideeën, het is tijd om uw kennis op de proef te stellen. Deze sectie biedt een verscheidenheid aan oefeningen vragen die bedoeld zijn om uw begrip te vergroten en u te helpen uw begrip van de stof te peilen.
Je zult een mix van vraagtypen tegenkomen, waaronder meerkeuzevragen, korte antwoordvragen en essayvragen. Elke vraag is zorgvuldig samengesteld om verschillende aspecten van je kennis en kritisch denkvermogen te beoordelen.
Gebruik dit evaluatiegedeelte als een kans om je begrip van het onderwerp te versterken en om gebieden te identificeren waar je mogelijk extra studie nodig hebt. Laat je niet ontmoedigen door eventuele uitdagingen die je tegenkomt; beschouw ze in plaats daarvan als kansen voor groei en verbetering.
- 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
Maak deze vragen in de app
Maak deze vragen in de app
Aanbevolen Boeken
Oefen Proefexamenvragen
Wilt u proefexamenvragen over Material Management oefenen? Download de Green Bridge CBT-app voor toegang tot proefexamenvragen en volledige oefentoetsen over dit onderwerp.
Download de app in de Google Playstore
Alles wat je nodig hebt om uit te blinken in JAMB, WAEC en NECO.
