EnglishinMechanicalEngineeringUnit 4 Mechanical Design and Theory
English in Mechanical Engineering Unit 4 Mechanical Design and Theory
MAINCONTENTSOFTHECHAPTER 4.1Different types of mechanical design problems 4.2Machineelements in mechanical design 4.3Friction,Wear and Lubrication4.4IndustrialRobot
4.1 Different types of mechanical design problems 4.2 Machine elements in mechanical design 4.3 Friction, Wear and Lubrication 4.4 Industrial Robot MAIN CONTENTS OF THE CHAPTER
MAINCONTENTSOFTHECHAPTER 4.1Different types of mechanical design problems 4.2 Machine elements in mechanical design 4.3Friction,Wear and Lubrication4.4IndustrialRobot
4.1 Different types of mechanical design problems 4.2 Machine elements in mechanical design 4.3 Friction, Wear and Lubrication 4.4 Industrial Robot MAIN CONTENTS OF THE CHAPTER
4.1Differenttypes of mechanical design problems? 4.1.1Selection Design4.1.2Configuration Design4.1.3Parametric Design4.1.4OriginalDesign?4.1.5Redesign4.1.6VariantDesign4.1.7ConceptualDesign andProduct Design
4.1.1 Selection Design 4.1.2 Configuration Design 4.1.3 Parametric Design 4.1.4 Original Design 4.1.5 Redesign 4.1.6 Variant Design 4.1.7 Conceptual Design and Product Design 4.1 Different types of mechanical design problems
4.1.1 Selection DesignConsiderthefollowingexampleTheshafthasadiameterof20mm（0.787in).轴的直径为20mmThere is a radial force of 6675N on the shaft at the bearing,and the shaft rotates at amaximumof2000rpm轴承轴的径向力为6675N，最大转速为2000rpmTab,4-1 Potential bearings for a shaffOutsideLoadCatalogSpeeddiameter (mm)Width (mm)Bimit (rpm)Typetating (lb)number记15015.08456204Barrne22390063049000Beanne7073811903.00agular-conta:Shaft6675 NRaller2131：:0022093502000rpmeacing241193013,000208Vecfli280013,000arinl23VariableNylon290104930bushing500Fig.4-1.Load on a shaft
4.1.1 Selection Design Consider the following example. The shaft has a diameter of 20 mm (0.787 in). 轴的直径为20mm There is a radial force of 6675N on the shaft at the bearing, and the shaft rotates at a maximum of 2000 rpm. 轴承轴的径向力为6675N，最大转速为2000rpm