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Engr. Inam Ul Haq Raja 2

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 : inam@mail.au.edu.pk

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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Workplace Hazards

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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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What is a Hazard

Cuts Trip

Burn

Crush

Hearing loss

Eye injury Sickness Pain

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Hazard Signs

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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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Thanks! 32