INDUS INSTITUTE OF TECHNOLOGY & ENGINEERING

DEPARTMENT OF

MECHANICAL ENGINEERING

Name : Keval Patel

Subject Code :

Subject Name : Machine Design And Industrial Drafting

B.E Mechanical Engineering , 1st Semester

Machine Design

• Creation of new and better machines and improving the existing ones.

• Better machine is one which is more economical in the overall cost of production and operation

Machine design

New design Adaptive design Develop design

General Considerations in Machine Design

Type of load and stresses caused by the load. Motion of the parts or kinematics of the machine. Selection of materials. Form and size of the parts. Frictional resistance and lubrication. Convenient and economical features. Use of standard parts. Safety of operation. Workshop facilities. Number of machines to be manufactured. Cost of construction. Assembling.

General Procedure in Machine Design

Classification of materials

Material

Metals

Ferrous

Cast iron

Steel

HSS

Alloy Steel

Non ferrous

Brass

Copper

Tin

Aluminum

Non metals

Plastics

Glass

Rubber

Ceramics

Wood

composites

Glass fiber

Carbon fiber

FRP

Physical Properties of Metals

• Colour• Size• Shape• Density• Electric conductivity• Thermal conductivity• Melting point• Transparency

Mechanical Properties of Metals

• Strength

• Stiffness

• Elasticity

• Plasticity

• Ductility

• Brittleness

• Toughness

• Machinability

• Resilience

• Creep

• Fatigue

• Hardness

Any Questions ????