Module 4-Compressed
Module 4-Compressed
2 ©2006 TEEX
1. Point of operation: where work is performed on the 3. Operation Controls: Control mechanisms
material, such as cutting, shaping, boring, or forming of
4. Other moving parts: can include reciprocating,
stock.
rotating, and transverse moving parts, feed
2. Power Transmission Device: transmits energy to the part
of the machine performing the work
mechanisms, and auxiliary parts of the machine
▪ Includes flywheels, pulleys, belts, connecting rods, couplings, cams,
spindles, chains, cranks, and gears.
▪ Powered blade that shears materials ▪ Power applied to a slide to stamp/shape materials
▪ Hazard at point of operation ▪ Hazard at point of operation
Guarding Principles
15 ©2006 TEEX
Part Two: Safeguarding
Automatic/Semi-Auto feed
Automatic/Semi-Auto ejection
Robotics
• Must not allow product or objects to fall into Guards are barriers which prevent access to
moving parts or onto people. danger areas.
• Get Buy-in from Operators, PM Tech, Lube and
Maintenance Techs.
First Safeguarding Strategy: Guards Part Two: Safeguarding
As a general rule, power transmission apparatus
Fixed Guard Characteristics:
is best protected by fixed guards that enclose the
– A permanent part of the machine. Tools danger areas.
are needed for removal.
– Not dependent upon moving parts to
perform its intended function.
Enclosed shaft
– Constructed of sheet metal, screen, wire end
cloth, bars, plastic, or substantial material.
– Usually preferable to all other types
because of its simplicity and permanence.
Self-Adjusting Guards
The openings of these guards are
determined by the movement of the stock.
– As the operator moves the stock into
the danger area, the guard is pushed
away, providing an opening which is
only large enough to admit the stock.
– After the stock is removed, the
guard returns to the rest position.
• Restraint
– The restraint (holdout) device utilizes
cables or straps that are attached to the
operator's hands at a fixed point
– The cables or straps must be adjusted to
let the operator's hands travel within a
predetermined safe area - there is no
extending or retracting action involved
Second Safeguarding Strategy: Devices Second Safeguarding Strategy: Devices
• Pullback
– Pullback devices utilize a series of cables
attached to the operator's hands, wrists,
and/or arms
– This type of device is primarily used on
machines with stroking action
– When the slide/ram is up between cycles,
the operator is allowed access to the point
of operation
*
➢Mechanical Power Presses are machines that
transmit force to cut, form, or assemble metal or
other materials through tools or dies attached to or
operated by slides.
➢3 types of Mechanical Power Presses
o Mechanical
o Hydraulic
o Pneumatic
➢ A Mechanical Press is a machine that exerts ➢ Major components of a Mechanical Press are;
pressure to form or shape or cut materials or o The Frame
extract liquids or compress solids. o Motor
➢ A Press is a mechanically powered machine that o Flywheel
punches, shears, forms or assembles metal or other o Crankshaft
materials by means of cutting, shaping or
combination of dies attached to slides or rams. o Clutch
➢ A Press consists of a stationary bed ( or anvil ),
o Brake
and a slide ( or slides ) having a controlled
reciprocating motion toward and away from the
bed surface, the slide being guided in a defined
path by the frame of the press.
➢ Main Hazard
o AMPUTAIONS
▪ Placing hand into point of operations
▪ Unguarded or inadequately guarded presses
▪ Deactivating or over-riding safeguards
➢ Safeguards most commonly used:
*
o Barrier guards attached to fixed surfaces
o Presence-Sensing devices
▪ Radio Frequency Sensors
▪ Light Curtains
▪ Pullback Devices
▪ Fixed Guards
Safety Precautions When Dealing With Boring
• Handling boring mills is a complex job that requires specialist • Always have protective clothing
precaution aimed at protecting yourself, your colleagues, and your ✓There is a need to have the right protective gear on. This minimizes
staff from bodily injuries. the chances of industrial accidents, since your body is always
• Use the right tool for the right job covered in the right clothing.
✓One of the primary causes of industrial injuries is broken drilling ✓For a safer operational environment, the clothing used should be
heads. By having the right tooling edge matched with the right tight enough to protect you from having loose hangings that can be
operational spindle speed for the right work piece, the chances of easily trapped in the revolving mill parts. Protective optical ware
industrial accidents are greatly reduced should also be used at all times to protect your eyes from exposure
to work piece off-cuts.
• Know your machine • Service your machines regularly
✓Having proper technical knowhow about your machine gives you a ✓Regular repairing and servicing of your boring tools give them a
competitive edge in increasing your safety. precise way of delivering on your expectations.
✓In fact, less experienced boring machine users have been proven to ✓It also safeguards your company from technical breakdowns
be thrice as likely as their experienced peers to cause machine- resulting from poorly maintained boring tools.
related accidents.
✓Therefore, only personnel with the right skills should be granted the
green light to work with the boring mills.
*
*
* Most farms and small shops have some type of equipment for welding and
cutting metals.
* Acetylene is the most commonly used fuel gas. Acetylene is very flammable
* Oxygen won’t burn or explode, but it helps other objects burn at greater rates.
compressed gas can shoot through the air like a rocket if its valve is damaged
or broken.
*Storage and Handling *General Gas Welding Safety Tips
• Inspect equipment for leaks at all connections using approved leak-test solution.
• Keep cylinders away from physical damage, heat, and tampering. • Inspect hoses for leaks and worn places.
• Securely chain equipment to prevent falling. • Replace bad hoses.
• Protect hoses and cylinders from sparks, flames, and hot metal.
• Store away from flammable and combustible materials. • Use a flint lighter to ignite the flame.
• Stand to the side (away from the regulators) when opening cylinder valves.
• Store extra gas and oxygen cylinders separately.
• Open cylinder valves very slowly to keep sudden high pressures from exploding the regulators.
• Store in an upright position. • Only open the acetylene cylinder valve ¼-¾ turn; leave wrench in place so the cylinder can be
quickly closed in an emergency.
• Close cylinder valves before moving. • Open and light acetylene first, then open and adjust oxygen to a neutral flame.
• Protective caps or regulators should be kept in place. • Follow the manufacturer's recommendations for shutting off the torch. If the guidelines are not
readily available, the commonly accepted practice is to close the oxygen valve first.
• Roll cylinders on bottom edges to move—Do not drag. • When finished, close cylinder valves, bleed the lines to take pressure off regulators, neatly coil
hoses, and replace equipment.
• Allow very little movement when transporting. • Have a fire extinguisher easily accessible at the welding site.
95 96
Electric Shock Arc Rays
• Electric shock can kill • Arc rays can injure eyes and
• Do not touch live electrical burn skin
parts • The welding arc is brighter
– Primary Voltage –230, 460 than the sun
volt input power
• Precaution must be taken to
– Secondary Voltage – 6 to protect your eyes and skin
100 volts for welding
from UV radiation
• Insulate yourself from • Wear correct eye and body
work and ground protection
Do not make repairs
• Follow all warnings on yourself, alert your
welding equipment instructor immediately!
97 98
Noise
Fire and Explosion Hazards
99 100
Protective Clothing
101
Manual Handling
means and this includes lifting, transporting, stacking, loading and unloading by means of 3. Mechanical damage and faulty equipment.
palletizer, chain pulley block, forklifts, conveyors or cranes and hoists. 4. Congested space for operation.
5. Incompetent operator.
• Mechanical material handling avoids a high risk of musculoskeletal disorders resulting
6. Overloading of machines, tools and equipment.
from manual material handling.
7. Loading and transporting unbalanced materials.
• Mechanical material handling helps increase levels of productivity in the workplace.
8. Poor rigging and lifting.
There is no doubt that machines can do many tasks more quickly and efficiently in less time
9. Over speeding and unauthorized operation
which human cannot do.
10.Use of machines without machine guard.
1. Poorly maintained tools, equipment and machines are prone to accidents due to failure of electrical, mechanical, and 1. Use lifting tools and hoists of adequate capacity.
hydraulic systems that can cause serious injury to personnel and property damage. 2. Only authorized persons should use the equipment and machines.
2. Risk of load failure due to inadequate and incorrect selection of handling tools and machinery. 3. The identification number and the safe working load must be marked on all tools and hoists.
4. Check the functioning of emergency switch, limit switches and over load alarm before actually starting the operation of
3. There is a risk of collision with property or personnel due to congested operating space.
lifting machines.
4. An untrained and unauthorized machine operator can cause serious accidents and injure other personnel.
5. Estimate the weight, distance, and hazards before lifting the load.
5. Risk of material failure during handling due to overloading of machines, tools and equipment.
6. Store lifting tools and hoists in a designated location.
6. Equipment can fall due to improper loading and transportation, poor rigging and lifting, and over speeding by 7. Use appropriate personal protective equipment
unauthorized operation. 8. Keep the speed slow while approaching at destinated location.
7. The use of machines without guards presents a high risk of serious injury.
Don’ts
1. Don’t use faulty tools and tackles.
12. Barricade the area where the lifting operation is performed. 6. Don’t load the machines and equipment above its safe working load.
• Task: Manual handling tasks that are too strenuous, involves long distances, and
availability of rest and recovery.
• Individual: This involves the worker’s capabilities such as no training, lack of experience,
unfamiliar with the job, physical capabilities, and prior history of injuries.
• Load: This risk can be caused by objects that are too heavy, too large, difficult to grasp or
reach, obscures the worker’s view, and unbalanced, unstable or if its contents can move.
• Other factors: monotonous tasks at a high pace and prolonged work without resting,
among others.
Use Proper Lifting Techniques Solutions for Pulling
• Avoid lifting heavy items above chest height. • Keep your feet hip-width apart.
• Use the “big toe” test to test the weight of the object. If you can push the item
with your toe, it is safe to move it alone. If not, ask for help. • When bending forward to pull, drop your hips and bend your knees.
• When picking up a heavy item from the ground, stand close to the load with your Concentrate on keeping your core muscles tight to decrease pressure
feet shoulder-width apart. on your back.
• Squat down, bending at your knees, keeping your back as straight as possible.
• Make sure you have a firm grasp on the object before lifting. Use handles, if
• Always face the object you are pulling. Take small, backward steps
available. once you start to move.
• If you are lifting with a partner, coordinate lifting time.
• Once the object is lifted off of the ground, carry it as close to your body as
possible to prevent the object from losing its center of gravity and falling to the
ground.
After clamp use ▪ Consider investing in clamp racks or carts to keep clamps stored properly.
• Once a clamp’s job is finished, remove it from the workpiece immediately.
• After every use, wipe each part of the clamp with a dry cloth.
• Clearing any dust or debris will ensure there’s no buildup, and keeping clamps clean will help to avoid slippage
when working on your next project.
• Any dirt, dust, or debris has the potential to damage your clamp’s working ability and can even leave marks or
stains on the surface of your workpiece.
• You can also regularly buff your bar with paste wax, keeping all the moving parts of your clamp in top condition
and preventing rust development.