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Types of mechanical forces

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A force exerted on a body can cause a change in either the shape or the motion of the body.The unit of force in SI system is the Newton(N) and CGS system is dyne.No solid body is perfectly rigid and when force are applied to it,changes in dimension occur.such changes are not always perceptible to the human eye since they are negligible. For the example,The span of a bridge will sag under the weight of a vehicle and a spanner will bend slightly when tightening a nut. It is also important for civil engineers and designers to appreciate the effects of forces on materials.Together with their mechanical properties of the materials. There three main types of mechanical forces that can act on a body.They are 1)Tensile force 2) compressive force and 3) shear force
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CUTTING SPEED,FEED AND DEPTH OF CUT IN PLANER MACHINE

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CUTTING SPEED:

The cutting speed in planing is the speed of the work in the direction of cutting motion when the metal is being cut. it is expressed in m/min.

FEED:

The feed in planer is the distance the tool head moves at the beginning of each cutting stroke.it is expressed in mm per full stroke (double stroke).

DEPTH OF CUT:

Depth of cut is the thickness of metal removed in one cut or pass.it is measured in the direction perpendicular to the machined surface.it is expressed in mm.

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