Mechanical engineering info

 HEAT TRANSFER WHAT IS HEAT TRANSFER ? Heat transfer is a form of energy transmit due to temperature difference . Heat transfer is a transmission of energy from one region to another region as a result of temperature difference Heat is a path function . heat flow from high temperature to lower temperature transfer heat high body to lower body STEADY STATE HEAT TRANSFER There is no change in heat transfer with time at any point in a direction within the medium dQ/dT = 0 ,  here Q is heat transfer In this case of energy transfer the temperature is only function of space-coordinate , not a function of time, mathematically for rectangular coordinate system   T=f(x,y,z) for example of steady state heat transfer Heat exchanger with fluid flow Heat generation due to electric current UNSTEADY STATE HEAT TRANSFER Change in heat transfer at any point with time in direction within the medium is called as unsteady heat transfer Q is heat transfer is not equal to zero In this cas...

 METAL CASTING PROCESS  What is casting ? Casing process is defined as the process of producing metal or alloy component of desired shape by pouring it into mould by used necessary cooling process to solidify & this solidify metal or alloy piece is known as casting  The manufacturer of a casting requires Preparation of pattern Preparation of mould with the help of the pattern  Melting the metal or alloy in the farnance  Pouring of molten metal into mould cavity Breaking the mould to retrieve the casting Cleaning the casting and cutting of risers, runners etc. Inspection of casting  The place where casting process are carried out is known as foundry, Casting is also known as founding.(bellow image shows foundry) Casting are made in a large number of metal and alloys , both ferrous and non-ferrous, grey cast iron components are very common; Steel castings are stonger and are used for components subjected to higher stresses. Bronze and brass casting are us...

 WHAT IS FORGING  ?            Forging is metal forming process to giving required shape & size to red hot metal by applied   impact force           forging is process where metal and alloy first heated above its cretical tempreture and after that  compressive force is applied to get final shape by plastic deformation Types of forging :- smith and hand forging  drop forging press forging  machine forging , upset forging    SMITH FORGING :-            In this type of forging smith is used to to get shaped & hammer on red hot metal manually Hence  its also called as Hand forging.                                   DROP FORGING :-           In the drop forging process the red hot metal and alloy placed on die and after that first raised...