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Learning Objectives
Meaning of safety
General safety precautions in the workshop
Hazards and types of hazards
Types of Accidents in workshop
Good housekeeping
Fire prevention and safety measures 3
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Points to Ponder Follow the Timings Religiously - No late coming!
I encourage open and frank discussions
Please ask questions inside and outside class!
Cell-phone usage during lecture is Strictly Prohibited, it must be kept “OFF” or in Silent / Meeting / Vibration mode during class. Each violation will be penalized
Make a Habit of Daily Study
Soft Copy of each Lecture will be available on Class PC-You may download
Must maintain at least 75% attendance to be eligible to sit in Final Exams
I expect Class Representative (CR) to:-
Ensure that computer, multimedia and markers are in ready to use condition
White Board is Clear
Wall Clock is working with PST
Introduction
Course Outline
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ME 140 Workshop Technology-1 Credit Hrs: 0 -1 (3 contact hours)
Prerequisites : Nil Semester : Fall 2015
Instructor: Engr. Inam Ul Haq Raja
E-mail : [email protected]
Office Hours : Monday to Friday :
08:30-16:30 hrs
Office: Room 112 IAA Building
Office Phone: 521
Cell# 0333-4361256
Text Book:
“Workshop Technology (Part I)” by W.A.J Chapman, 4th Edition, Viva Books
New Delhi 2001, ISBN: 8185617805.
“Workshop Technology (Part II)” by W.A.J Chapman, 4th Edition, A
Butterworth-Heinemann Title 1972, ISBN: 0713132728.
Reference Book:
“Introduction to Basic Manufacturing Processes and Workshop Technology”
by Rajendar Singh, 2nd Edition, New Age International (P) Limited 2010,
ISBN: 8122430708.
Safety
Keeping the work area safe
Wearing the right protective
equipment
Following the safety rules
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General Safety Precautions:
Machine Shop
One should use the correct tools and
work holding devices recommended
for the process
One should hold the work piece and
tool securely on the machine
Never try to remove chips from the
machine with hands
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General Safety Precautions:
Machine Shop
One should not touch a job-piece with
bare hands while doing inspection or
removing it from the machine. Use
gloves always
One should operate the machine at
recommended operating conditions
based on work material and tool
material combination and other
cutting conditions specified
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General Safety Precautions:
Machine Shop
One should use recommended coolant
depending upon work-tool material
combination
During machining ductile materials, use
chip breakers and chip guards
One should re-sharp the tool
immediately when it starts producing
rough surfaces on the job-piece or
produces chatter 15
General Safety Precautions:
Machine Shop
One should not run the machines at
speed higher than recommended. It may
produce vibrations and chatter and
damage job-piece, tool, or both
In case of power failures, switch off the
machine and retrieve tool from the work-
piece
One should wear goggles to protect eyes
from flying chips
Stop machine before attempting to
clean, removing tool or work-piece
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What is a Hazard
Anything that could hurt you or make
you sick
What could hurt you or make
you sick where you work?
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Accidents in Workshop
Types of Accidents
Near Accident: An accident with no damage or injury is called near accident
Trivial: An accident with very less damage is called trivial
Minor Accident: It is an accident with damage and injury more
than trivial
Serious Accident: An accident with heavy damage and lot of
injury is called serious accident
Fatal: It is an accident with very heavy damage; there may be
loss of lives also 21
Causes of Accidents
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Human Causes
Accidents may Occur due to:-
While working on unsafe or dangerous equipment or
machineries possessing rotating, reciprocating and moving
parts
While operating machines without knowledge, without safety
precautions, without authority, without safety devices
While operating or working at unsafe speed
While working for long duration of work, shift duty etc.
Working with mental worries,
Ignorance, carelessness, nervousness, dreaming etc.
Because of not using personal protective devices
Causes of Accidents
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Environmental Causes
Accidents may Occur due to:-
Fatigue caused by working at elevated temperatures
and high humidity levels
The presence of dust, fumes, and smoke in the working
area
Poor housekeeping, congestion, blocked exits, bad
plant layout etc.
Inadequate illumination
Improper ventilation in the plant
Causes of Accidents
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Mechanical Causes
Accidents may Occur due to:-
Continued use of old, poor maintained or unsafe
equipment may result in accidents
Use of unguarded or improper guarded machines or
equipment
Unsafe processes, unsafe design and unsafe
construction of building structure
Improper material handling system
Safety Statistics
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Fourteen thousand Americans die from on-
the-job accidents every year
A worker is injured every 18 seconds
Most accidents occur within an employee’s
first six months on a new job
Good House Keeping
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Always keep the machine clean as oily surfaces
can be dangerous
Keep the floor free from grease and oil
Sweep up the metal chips on the floor frequently
Never place tools or material close to the
machines as they interfere with the operator’s
ability to move safely around the machine
Always stop the machine before you attempt to
clean it
Never use compressed air to remove chips from a machine
Fire Prevention
Always dispose of oily rags in proper metal
containers
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Know the location and the operation of
every fire extinguisher in the shop
Know the location of the nearest fire exit
from the building
Fire Prevention
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When using a welding
torch be sure to direct the
sparks away from any
combustible material
Fire Triangle
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Three Elements are needed for fire to occur:
Fuel – combustible products: petrol, diesel, oil, grease etc.
Heat – ignition source
Oxygen – fire will not start or will starve if not enough
Remove any of the three and the fire will not take place
When to use a fire
extinguisher
• If you have been trained and can
do so safely
• When fire is Small, contained
and not spreading
• If you have a clear evacuation
route
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Re-Cap
• Know safety hazards
• Always follow the safe work practices.
• Take care fire hazards.
• Ensure good house keeping.
• Know the safety hazard in your work area
• Know fire safety measures
• Get first aid immediately for any injury, no
matter how small.
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