Principle of Lathe and different Lathes

1. Lathe Machine
PRODUCTI
ON
TECHNOLO
GY

2. Introduction
Lathe is a machine, which removes the metal
from a piece of work to the required shape &size

3. Types of Lathengine Lathe
he most common form of lathe, motor driven and
comes in large variety of sizes and shapes.
ench Lathe
bench top model usually of low power used to
make precision machine small work pieces.
racer Lathe

4. utomatic Lathe
lathe in which the work piece is automatically fed and
removed without use of an operator. Cutting operations are
automatically controlled by a
equencer of some form
urret Lathe
athe 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.
omputer Controlled Lathe
highly automated lathe, where both cutting, loading, tool

5. Component Description

6. Lathe Operations
Turning:produce straight, conical, curved, or grooved workpieces
Facing: 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 previous
process 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

7. Work Holding Devices
Fig : (a) and (b) Schematic illustrations of a draw-in-type collets. The workpiece is placed in the collet hole,
and the conical surfaces of the collet are forced inward by pulling it with a draw bar into the sleeve.
(c) A push-out type collet. (d) Workholding of a part on a face plate.

8. Three jaw chuck
- For holding- For holding
cylindrical stockcylindrical stock
centered.centered.
- For facing/center- For facing/center
drilling the end of yourdrilling the end of your
aluminum stockaluminum stock
Four-Jaw Chuck
- This is independent
chuck generally has four
jaws , which are
adjusted individually on
the chuck face by means
of adjusting screws

9. • Thin jobs can be held by means of
magnetic chucks.
Collet Chuck
Magnetic Chuck
Collet chuck isCollet chuck is
used to hold smallused to hold small
workpiecesworkpieces
Thin jobs can beThin jobs can be
held by means ofheld by means of
magnetic chucks.magnetic chucks.

10. Drill chuck and Chuck key
A chucki s a specialized type
ofclampused to hold an object,
[1]usually an object withradial
symmetry, especially
acylindricalobject. It is most
commonly used to hold a rotating
tool (such as thedrill bitin apower
tool) ora rotating workpiece (such
asthebaror blank in the
headstockspindleof alathe).

11. Angle plate
An angle plateis a work holding
device used as afixturein
metalworking.The angle plate is
made fromhigh quality material
(generally spheroidalcast iron)
that has been stabilized to
prevent further movement
ordistortion. Slotted holes orTbolt
slots are machined into the
surfaces to enable the secure
attachment or clamping of
workpieces to theplate, and also
of the plate tothe worktable.

12. Mandrel
Mandrel. is used for holding and
rotating hallow work pieces
between the centers

13. Steady rest
Steady rest is used for giving
support to the rotating workpiece
in order to diflect. It is fixed on
bed ways

14. Follower rest
It performs the same function's as
steady rest. It is mounted on the
lathe saddle and moves together
with carriage.

15. Lathe Operations

16. Lathe operations
Centering:
-
Centering is the process of producing conical holes at the
end of the workpiece.

17. TURNING
1)Rough turning
2)Finish turning
3)shoulder turning
4)Taper turning.

18. Threading
Cutting of helical grooves over a cylindrical or conical workpiece is called
threading.
threading.

19. Facing
Facing is the operation of producing flat end surface to
the workpiece.

20. Boring
Boring is the operation of enlarging the previously
drilled holes.

21. Knurling
Knurling is the operation of producing indentation
(margins or recess) on cylindrical surfaces.

22. Forming
Forming is the operation of producing special
counters or shapes on the surface of the
workpiece.

23. Parting Off
Parting off is the operation of cutting or seperating the
finished workpiece from the bar stock.

24. Drilling
Drilling is the operation of producing holes in the
workpiece.

25. Reaming
Reaming is a process of producing smooth and accurate holes.

26. Chamferin
g
Chamfering is the operation of bevelling at the edges of the workpiece.

27. Cutting Tools
Single point cutting tool

28. Tool 's used in lathe
1.solid tool
2.Braze tool
3.Inserted -bit tool

29. 2nd

30. Turret indexing mechanism for turret and
capstan lathe

32. Bar feeding mechanism of turret lathe

33. Tool holding device's of turret &capstan
lathe
Straight cutter
holder :-

34. Multiple current holder :-

36. Knee too holder :-

37. Flange tool holder :-

38. Knurling tool holder :-

39. Form tool holder :-

41. Roller study tool holder :-

42. Die holder :-

43. capstan and turret lathes