sandr049

Introdu c tion Design is essentially a deci s ion - making p r ocess. If we have a p r oblem, we need to design a solution. In other words, to design is to formulate a plan to satis f y a particular need and to create something with a physical reality. Consider for an example, design of a chair. A number of factors need be considered first: (a) The purpo s e for which the chair is to be de s igned s uch as whether it is to be used as an easy chair, an office cha i r or to accompany a dining table. (b) Whether the chair is to be designed for a grown up person or a child. (c) Material for the chair, i ts strength and cost need to be determined. (d) Finally, the aesthetics of the designed chair. Almost everyone is involved in design, in one way or the other, in our daily lives because p r oblems are posed and they need to be solved.  c oncept of machine design Deci s i on making co m es in every stage of de s ...

What Is a Gear ? † A g ear is a t oo t hed w heel w hi c h is u s ed t o t ran s m it po w er and m o t ion be t w een m a c hine par t s . Ge a rs   are   used   in  m any   ap p li c atio n s   li k e   auto m obi l e   en g ines,       ho u s eh o ld    ap p lia n c e s ,   ind u st ri a l   m achine   t ools. W hen   t w o   gears   of   di f f ere n t   s i z es   are   m e s hed   , t he   larger   is  c alled   “ g ea r ”   w hile  t he   s m aller   is   “ p i n i on ”. †   Gear T ooth T er m i n ol o gy Root Diameter : Diameter of root circle. Pitch Diameter : Diameter of imaginary pitch circle specifying addendum and dedendum  Outside Diameter : Diameter of addendum (outside) circle . Addendum : Radial distance from pitch to top of tooth . Dedendum : Radial distance from pitch to bottom...