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Chapter10ba - Materials Processes in Manufacturing ME 151...

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©2003 Bill Young 1 Materials & Processes in Manufacturing ME 151 Chapter 10 Measurement and Inspection ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ©2003 Bill Young 2 Introduction High volume manufacturing is based on the principles of standardization of sizes and interchangability of parts is essential for interchangable parts Size control must be built into the equipment and tooling The output of the machines / processes must be monitored to: Determine the machines capabilities To control the quality of the product is the examination of the product either during or after manufacture to establish its suitability for use The intent of inspection is to ensure that what is manufactured conforms to the product specifications Measurement is the fundamental activity of inspection and the process of collecting data ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ©2003 Bill Young 3 Methods of Inspection Methods of Inspection 2 categories of inspection: Inspection by (Gaging) Utilize gages to determine good / bad, go / no-go, or yes / no decision Inspection by (Measurment) Utilize calibrated instruments to determine actual dimensions ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________
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©2003 Bill Young 4 Four Fundamental Measures Four Fundamental Measures Length Time Mass Temperature Ampere Candela Length Standards Measurement and gaging must be based on reliable and universal standards The standard of linear measurement throughout the world is the _________ Gage blocks provide linear standards of high accuracy Conform to National Bureau of Standards Available in different grades (Page 250) Standard measuring temperature 68 o F (20 o C) ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________
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