GAUTAM RAVI RANJAN

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Showing posts with the label Machine Design

What is Pressure Vessels ?

Machine Design Pressure Vessels What is Pressure Vessels? Pressure Vessels is a cylinderical Or spherical shape which is used to store fluids under pressure. Design of pressure Vessels is with high care. Material of pressure Vessels in brittle is Cast Iron and in ductile is Mild Steel. Disadvantage of pressure Vessels is when repture of pressure Vessels, may causes loss of life, property. Size of Pressure Vessels Cylindrical, Tanks Use of Pressure Vessels To store fluids under pressure Design of Pressure Vessels With high care Material of Pressure Vessels Brittle - Cast iron Ductile - Mild steel Disadvantage of Pressure Vessels When repture of pressure Vessels, may causes loss of life, property

Manufacturing Consideration : QWA

Machine Design Question With Answer (QWA) Manufacturing Consideration : The metal is subjected to mechanical working for --------. Answer - Refining grain size . Reducing original block into desired shape . Controlling the direction of flow lines . The castings produced by forcing molten metal under pressure into a permanent metal mould is known as -------. Answer - Die Casting. The temperature at which the new grains are formed in the metal is called --------. Answer - Recrystallisation Temperature. The hot working of metals is carried out -------. Answer - Above the recrystallisation Temperature. During hot working of metals -----. Answer - Porosity of the metal is largely eliminated. Grain Structure of the metal is refined. Mechanical properties are improved due to refinement of grains.

Spur Gear : Machine Design

Spur Gear : Machine Design In Introduction : Slipping of a belt or rope is the transmission of motion or power between two shafts. The effect of slipping is to reduce the velocity ratio of system . The motion and power transmitted by gears is equivalent to transmitted by functional wheel or disc . Advantages of Gear Drive :. Transmits exact velocity ratio Transmit large power Used for small centre distance if shafts High Efficiency Reliability Service Compact Layout Disadvantages of Gear Drive :. Require special tools and equipment Require lubricant and proper operation Vibration and noise during operation Classification of Gears : 1. According to position of axes of shifts :. ...

Simple Stresses in Machine Parts : Machine Design

Simple Stresses in Machine Parts : The machine parts are subjected to a various forces which is due to energy transmitted , weight of machine , frictional resistance , Inertia of reciprocating parts , change of temperature and lack of balance of moving parts . Load : Load is the external force acting upon a machine part . Dead or steady load Live or variable load Suddenly applied or Shock loads Impact load Dead load is means ' does not change magnitude or direction '. When change of magnitude or direction is continuously then it is live load . When load is suddenly applied or removed then load is called suddenly applied or Shock loads .When applied some initial velocity then load is impact load . Stress : When external forces or loads act on a body , the internal stress resist the external forces . This internal force per unit area at section is known as unit stress or stress . Stress is denoted as ( sigma ) .The unit of stress is N/mm2 or Pascal ( Pa ) . Where - P = Load ac...

Engineering Material and Their Properties: Machine Design

Engineering Material and Their Properties: The knowledge of materials and their properties is of great significance for a design engineer. A Design engineer must be familiar with the effects which the manufacturing processes and heat treatment have on the properties of the materials . Classification of Engineering Materials : 1. Metals and their alloys 2. Non - metals Metals may be further classified as - (a) ferrous metals (b) non -ferrous metals Ferrous metals are those which have the iron as their main constituent . Example : cost iron , wrought iron , steel etc. Non - ferrous metals are those which have a metal other than iron as their main constituent. Example : Copper, Aluminium , Broad , Zinc etc. Selection of Materials for Engineering Purpose : The selection of a proper material , for engineering purposes , is one of the most difficult problem for the designer . The following factors should be considered while selecting the material - 1. Availability of the materials 2. S...