MasTechFlexibleModularMasterProgrammeinTechnologySemestre 1Universitaire years2013-2014Mastech 2013AbrasiveMachininggandFinishingOperationsDeveloped by:MIle.BEN HASSAN ChahrazedMr. mar ZarrroukiSupervised by:Mr.Mnasri AbdelhakMr.Mihai NicolescuMr.Mnasri kaisMr.Mnasri Rachid
Mastech 2013 Semestre I Universitaire years 2013-2014 Abrasive Machining and Finishing Operations Developed by: Mlle. BEN HASSAN Chahrazed Mr: Omar Zarrrouki Mr.Mnasri Abdelhak Mr.Mnasri kais Mr.Mnasri Rachid Supervised by: Mr. Mihai Nicolescu ( ENIM)
IntroductionSome manufacturing processes cannot produce therequired dimensional accuracy or surfacefinishAn abrasive is a small, hard particle having sharpedges and an irregular shapeAbrasives is removing of small amounts of materialfrom a surface through a cutting process that producestiny chipsGrinding wheels can sharpenknives and toolsSandpaperoremeryclothcansmoothensurfacesandremovesharp corners
Introduction Some manufacturing processes cannot produce the required dimensional accuracy or surface finish An abrasive is a small, hard particle having sharp edges and an irregular shape Abrasives is removing of small amounts of material from a surface through a cutting process that produces tiny chips Grinding wheels can sharpen knives and tools Sandpaper or emery cloth can smoothen surfaces and remove sharp corners
IntroductionGrinding wheelWorkpiece(a)(c)(b)(d)ThinabrasivedisksWorkpieceGrindingwheelWorkpiece(e)(f)(g)
Introduction
AbrasivesandBondedAbrasivesAbrasives that are commonly used:ConventionalabrasivesSuperabrasives2.Above abrasives are harder than conventional cutting-tool materialsCubic boron nitride and diamond are the twohardestmaterials known;referred to as superabrasivesFriability defined as the ability of abrasive grains tofractureinto smaller pieces
Abrasives and Bonded Abrasives Abrasives that are commonly used: 1. Conventional abrasives 2. Superabrasives Above abrasives are harder than conventional cuttingtool materials Cubic boron nitride and diamond are the two hardest materials known; referred to as superabrasives Friability defined as the ability of abrasive grains to fracture into smaller pieces
AbrasivesandBondedAbrasivesAbrasiveTypesCommonly found in nature are emery, corundum(alumina), quartz, garnet and diamondAbrasives that have been made syntheticallyAluminum oxide1Seeded gel23.SiliconcarbideCubicboron nitrideDiamond5
Abrasives and Bonded Abrasives Abrasive Types Commonly found in nature are emery, corundum (alumina), quartz, garnet and diamond Abrasives that have been made synthetically: 1. Aluminum oxide 2. Seeded gel 3. Silicon carbide 4. Cubic boron nitride 5. Diamond