me_350_-_lect_10a_-_ch_24.20090925.4abceeca991739.28118329

me_350_-_lect_10a_-_ch_24.20090925.4abceeca991739.28118329...

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ME 350 – Lecture 10a – Chapter 24 ECONOMIC AND PRODUCT DESIGN CONSIDERATIONS IN MACHINING Tolerances and Surface Finish Selection of Cutting Conditions Product Design Considerations in Machining
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Machinability Criteria in Production Tool life – longer tool life for the given work material means better machinability Forces and power – lower forces and power mean better machinability Surface finish – better finish means better machinability Ease of chip disposal – easier chip disposal means better machinability
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Tolerances and Surface Finish Tolerances Machining provides high accuracy relative to most other shape-making processes Closer tolerances usually mean higher costs Surface roughness in machining determined by: 1. Geometric factors of the operation 2. Work material factors 3. Vibration and machine tool factors
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Effect of Cutting Conditions: End Cutting Nose Radius Feed Edge Angle End Cutting Nose Radius Feed Edge Angle
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Ideal Surface Roughness where R i = theoretical arithmetic average surface roughness; f = feed; NR = nose radius NR f R i 32 2 =
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me_350_-_lect_10a_-_ch_24.20090925.4abceeca991739.28118329...

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