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NAME : TURNING
SECTOR :
PRODUCTION AND MANUFACTURING
ENTRY REQUIREMENT :
Min. 8TH
STD. & 14 yrs
TERMINAL COMPETENCY :
The successful candidate would be able to:
• Use safety devices.
• Familiar with the necessary safety
precautions required to run a lathe.
• Plan the sequence of operations.
• Identify and know the purpose of the
work-holding and driving accessories
• Identify and know the purpose of the
cutting-tool-holding accessories
• Know the various types of materials,
cutting tools, measuring instruments and its application.
• To operate the conventional turning lathe
machine and produce components involving simple turning, step
turning, taper turning, threading and
knurling.
• To acquaint themselves in internal
drilling & boring operation.
DURATION : 210
hours
CONTENTS:
Practical Competencies
Select, use, clean and store personal
safety protective equipment.
Demonstrate the use of safety devices on
metal cutting machines
Demonstrate the use of work holding
devices on metal cutting machines.
Use and store of materials in a safe
manner.
Preparation of process planning sheet
Check measurements of components/machined
parts, using micrometers and verniers.
Check roundness of components using the
dial test indicator and vee blocks.
Practice on faceplate balancing.
Re-sharpen of plain turning tool on
pedestal grinder and inspection
Practical on work alignment, facing,
turning,drilling, chamfering, and parting off.
Carryout general turning between centers,
such as stepped shafts using fixed and traveling steadies.
State the safety precaution specific to
turning on the lathe.
Explain the principles workshop layout
State the purpose of turning.
Describe the principle of the measuring
instruments: its action, care and use for measurement setting up and assembly
operations-Micrometer: internal, external, depth. vernier : Caliper, depth,
height.
Identify types of lathe tools and their
uses.
Describe the geometry of the lathe tool
including tool angles and its effect on turning for roughing and finishing
operation
Type of cutting fluids & properties.
Carry out Simple machining calculation.
Calculation of speed, feed & depth of cut
using chart.
Describe the basic method of Work holding
devices – three jaw chuck, four jaw chuck, face plate, collet chuck etc.
Describe the basic methods of supporting
work – fixed steady, traveling steady.
Practical on Taper turning by compound
slide method.
Use sine bars and sine centers to set up
and check tapers.
Cut and chase screw threads.
Simple Form turning using manual feed.
Practical on Knurling.
Underpinning Knowledge (Theory)
Introduction to Lathe, description, types
of Lathe – constructional features and functions.
Specification of a Center Lathe.
Lathe operations- turn, drill, face,
chamfer, and part off knurl, threading, taper and form turn.
Describe the different types of drills
and taps used.
Classification of steels, alloy steels
and effect of alloying elements.
Identify the turning fault & remedies.
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