STUDY-ENGINEERING

BEARINGS A bearing is machine part, which support a moving element and confines its motion. The supporting member is usually designated as bearing and the supporting member may be journal. Since there is a relative motion between the bearing and the moving element, a certain amount of power must be absorbed in overcoming friction, and if the surface actually touches, there will be a rapid wear. Classification: Bearings are classified as follows: Depending upon the nature of contact between the working surfaces:- __Sliding contact bearings and __Rolling contact bearings. SLIDING BEARINGS: Hydrodynamically lubricated bearings Bearings with boundary lubrication Bearings with Extreme boundary lubrication. Bearings with Hydrostatic lubrication. Rolling element bearings: 1,Ball bearings 2,Roller bearings 3,Needle roller bearings Based on the nature of the load supported: • Radial bearings - Journal bearings • Thrust bearings ...

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sub-1 UNIT-1 UNIT-2 UNIT-3 UNIT-4 UNIT-5 UNIT-6 CAD/CAM UNIT-1 UNIT-2 UNIT-3 UNIT-4 UNIT-5 UNIT-6 UNIT – I Computers in industrial manufacturing, product cycle, CAD / CAM Hardware, basic structure, CPU, memory types, input devices, display devices, hard copy devices, storage devices. COMPUTER GRAPHICS: Raster scan graphics coordinate system, database structure for graphics modeling, transformation of geometry, 3D transformations, mathematics of projections, clipping, hidden surface removal. UNIT – II GEOMETRIC MODELING: Requirements, geometric models, geometric construction models, curve representation methods, surface representation methods, modeling facilities desired. DRAFTING AND MODELING SYSTEMS: Basic geometric commands, layers, display control commands, editing, dimensioning, solid modelling. UNIT – III PART PROGRAMMING FOR NC ...

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