Lathe Machine 2003

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Ashikumar H. Dahat

Samyak B. Godbole

Likesh P. Kapse

Umakant D. Katre

Pratik V. ManapureDasharath D. Meshram

Aniket C. Ozarde

Rajat C. Ramteke

Suraj S. Sarkar

Sumedh S. Somkuwar

Guided By:

Lect. R. P. Badole

Lathe Machine



Introduction:

Machine tool which spins a block of

material to perform various operations suchas cutting, sanding , knurling, drilling or deformation with tools that are applied tothe work piece to create an object which

has symmetry about an axis or rotation.

Lathe Machine



Lathe Machine

Lathe is a machine, which removes the

metal from a piece of work to therequired shape and size.

Definition



Lathe Machine

Engine Lathe

The most common form of lathe, motor drivenand comes in large variety of sizes and

shapes.Bench Lathe

A bench top model usually of low power used to make precision machine small work

pieces.

Tracer Lathe

a lathe that has the ability to follow a

template to copy a shape or contour.

Types of Lathe



Lathe Machine

Automatic LatheA lathe in which the work piece is automatically fed

and removed without use of an operator. Cuttingoperations are automatically controlled by asequencer of some form.Turret Lathelathe which have multiple tools mounted on turret

either attached to the tailstock or the cross-slide,which allows for quick changes in tooling and cutting

operations.Computer Controlled LatheA highly automated lathe, where both cutting,

loading, tool changing, and part unloading areautomatically controlled by computer coding.



Lathe Machine

Component Description



Lathe Machine

Block Diagram



Lathe Machine

Lathe OperationsTurning: produce straight, conical, curved, or grooved workpieces

acing: to produce a flat surface at the end of the part or for making

face grooves.

Boring: to enlarge a hole or cylindrical cavity made by a previousprocess or to produce circular internal grooves.

Drilling: to produce a hole by fixing a drill in the tailstock

Threading: to produce external or internal threads

Knurling: to produce a regularly shaped roughness on cylindrical

surfaces



Lathe Machine

Lathe Operations



Lathe Machine

Cutting ToolsSingle point cutting tool



Lathe Machine

Work Holding Devices

Fig : (a) and (b) Schematic illustrations of a draw-in-type collets. The workpiece is placed inthe collet hole, and the conical surfaces of the collet are forced inward by pulling itwith a draw bar into the sleeve. (c) A push-out type collet. (d) Workholding of a parton a face plate.



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Cutting Speed}Rate at which point on work circumference travels

past cutting tool

} Always expressed in feet per minute (ft/min) or

meters per minute (m/min)} Important to use correct speed for material

} Too high: cutting-tool breaks down rapidly

} Too low: time lost, low production rates

Cutting Parameters



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Depth of Cut

}Depth of chip taken by cutting tool and one-half total

amount removed from workpiece in one cut

}Only one roughing and one finishing cut

} Roughing cut should be deep as possible to reducediameter to within .030 to .040 inch or .75 to 1 mm of

size required

} Finishing cut should not be less than .005 inch or .125

mm

Cutting Parameters



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Depth of cut on a lathe

Cutting Parameters



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Feed Rateeed Rate(Lathe) refers to how fast a lathe-tool

should move through the material being cut. This

is calculated using the Feed Per Revolution for theparticular material. Lathe tools generally haveonly one tooth, so in most cases the FPT and FPRwill be the same. Feed rates will decrease withdull tools, a lack of coolant/lubrication, or deeper

cuts.

Cutting Parameters



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Machining Time

} Factors such as spindle speed, feed and depth of

cut must be considered

RPMxfeedrate

cutof lengthdistance Where

rate

distance Time

!

!

!

Cutting Parameters



Documents

Lathe Machine 2003