Material Management
Resumen
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.
Objetivos
- 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.
Mapa mental
Este tema esta esquematizado para ver como se conectan las ideas.
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Nota de la lección
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Evaluación de la lección
Felicitaciones por completar la lección del Material Management. Ahora que has explorado el conceptos e ideas clave, es hora de poner a prueba tus conocimientos. Esta sección ofrece una variedad de prácticas Preguntas diseñadas para reforzar su comprensión y ayudarle a evaluar su comprensión del material.
Te encontrarás con una variedad de tipos de preguntas, incluyendo preguntas de opción múltiple, preguntas de respuesta corta y preguntas de ensayo. Cada pregunta está cuidadosamente diseñada para evaluar diferentes aspectos de tu conocimiento y habilidades de pensamiento crítico.
Utiliza esta sección de evaluación como una oportunidad para reforzar tu comprensión del tema e identificar cualquier área en la que puedas necesitar un estudio adicional. No te desanimes por los desafíos que encuentres; en su lugar, míralos como oportunidades para el crecimiento y la mejora.
- 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
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