4.ppt - Electives Projects Min no of credits 141 Min no of...

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Electives/ Projects Min. no. of credits: 141 Min. no. of courses: 41 Max. no. of projects: 5 Max. no. of study project: 1 Max. no. of Discipline projects: 3 Min. no. of Humanities Electives: 3 Min. no. of Discipline Electives: 4 Min. no. of Open Electives: 5 Electives can be replaced by projects under same category. Other department projects/ courses will be considered as open projects /electives II year students can take only study projects
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2 Grinding Introduction Grinding Operations Grinding Wheel Grinding Parameters
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3 Introduction Abrasive Machining: material removal by hard abrasive particles a) The Material Too Hard; b) The Material Brittle; c) Part Surface Finish High; and d) Part Dimensional Accuracy High.
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4 Grinding Operations Grinding: material removal by a grinding wheel with bonded abrasive particles Surface Grinding Horizontal spindle Vertical spindle
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5 Grinding Operations Cylindrical Grinding External Internal
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6 Grinding Wheel - Abrasives Abrasives: small, nonmetallic hard particle having sharp edges and irregular shape to remove tiny chips
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7 Grinding Wheel - Abrasives Conventional Abrasives a) aluminum oxide (Al 2 O 3 ) b) silicon carbide (SiC) Superabrasives (super hard) a) cubic boron nitride (CBN) b) diamond
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8 Grinding Wheel - Abrasives Friability: the ability to fracture into small pieces for self-sharpening Grain Size: grit number, the larger, the finer Porosity: clearance for chips
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9 Grinding Wheel - Bond Bond: supporting posts or braces to hold abrasives together a) Vitrified (clay) b) Resinoid c) Rubber d) Metal
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10 Grinding Parameters Characteristics of Grinding a) irregular grain geometry and randomly placed b) large rake angle and very low shear angle c) varying radial positions of the grains d) high cutting speed
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11 Grinding Parameters Very High Specific Energy in Grinding Grinding Cutting
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12 Grinding Parameters MRR, Power, Torque, and Forces c t c c F F Force Thrust D T F Force Cutting D F T Torque N P T N T T P Power MRR P Power dwv MRR 3 . 1 2 2 2 ) 2 ( d d w v c F t F
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Abrasive Machining and Finishing Operations
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