Transcript Power Point - CTE-Auto

Power Tools & Equipment
Chapter 4
Compressed Air Systems
Air Compressor A machine by which outside air is
drawn in, compressed into a tank or
cylinder, and stored, so that its
expansion or release may be utilized
as a source of pneumatic power.
Compressed Air Systems
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The recommended maximum
operating air pressure for a
shop is 150psi.
Compressed Air Systems
Quick Disconnect Couplings
 Quick disconnect couplings are
designated as connecting devices
designed to permit easy and immediate
connection and separation of air or fluid
for pneumatic or hydraulic lines without
the need for tools.
Compressed Air Systems
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Air Pressure Regulator
A pressure regulator
automatically sets and
controls the compressor’s
operating pressure.
Regulators are used to
allow high-pressure
supply lines or tanks to
be reduced to safe and/or
usable pressures for
various applications.
Typical Compressed Air System
Compressor
Air Tools
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Pneumatic tools or air tools are tools
driven by compressed air supplied by a
compressor.
Air tools need to be periodically
lubricated to minimize wear and to
assure maximum service life.
Air wrenches are designed to remove
and install metal fasteners, rapidly.
Air Tools
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Air impact rotation is typically
controlled by a lever or button.
Since the air tool has a great
amount of power or torque, the
technician must use great care not
to damage bolts, nuts, or fasteners
when using an air wrench.
Air Tools
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Air RatchetAn air ratchet is used to work in hard-toreach places where other tools might be
difficult or impossible to use. The driveend of an air ratchet is typically 3/8” inch
square, however, they also come in ¼” or
½” sizes as well.
The air ratchet, like the air impact,
does not accurately tighten bolts or
nuts, so a torque wrench must be used
for final tightening to assure correct
torque is applied to the bolts or nuts.
Air Tools
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Air Hammer
An air hammer is a device that uses highly
pressurized air to drive a hammer into a work
piece for shaping, scoring, or cutting. Air
hammers have variable tips. For shaping and
plenishing, a hammer tip is used. For scoring or
cutting, a chisel tip is used. Whatever tip is used, it
will be pounded thousands of times per minute
into the targeted object, so operators must take
care and use caution. The air hammer must be
placed directly against the work surface to prevent
the driven bit from flying out of the end of the tool
and causing personal injury or damage. These
tools are very noisy, so ear protection is a must.
Air Tools
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Solvent GunA solvent gun is used to clean parts that do not fit
into a solvent tank. Care must be taken with the
solvent used, not to contaminate the environment.
Blow GunAn air-powered blow gun is used to dry off or clean
out the inside of hard to reach areas of parts.
Caution must be used with the blow gun to prevent
personal injury from air embolism. This happens
when the air is injected into or under the skin. Only
safety tipped nozzles should be used on blow guns.
Air Tools
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Air DrillFeatures and Benefits: Lightweight,
compact size is easy to handle, and
provides full power in forward and reverse
drilling applications. Aluminum body with
rubber handle grip. Easy control trigger
for operator convenience and variable
speed control.
Rotary files and abrasive disks can be used
with the air drill at slow speeds to clean
heavy gasket deposits and de-burr rough
metal edges easily.
Electric Tools
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Bench GrinderUsually has two wheels, a
grinding stone and a
wire wheel. It may be
used for sharpening
cutting tools such as
lathe tools or drill bits.
Alternatively it may be
used to roughly shape
metal prior to welding or
fitting.
Wire brush or buffing
wheels are often mounted
in place of the grinding
wheels and are used to
clean or polish workpieces.
Electric Tools
Bench Grinder – Safety Rules
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1. The tool rest (or work rest) should be
mounted slightly below the center of the
grinding wheel with less than 3 mm clearance
from the wheel. This prevents the work from
jamming between the tool rest and the wheel.
2. Grinding wheels designed for steel should not
be used for grinding softer metals, like
aluminum. The soft metal gets lodged in the
pores of the wheel and expand with the heat of
grinding. This can dislodge pieces of the grinding
wheel.
3. Wire brushes require particular attention for
the safety of the operator and bystanders as the
metal wires may become dangerous projectiles
as they could bind with the object being brushed
and so throw it away with great energy.
4. The machine needs to be securely mounted to
a pillar or a bench to be used safely and
effectively, often with an emergency stop switch
or pedal fitted close by the machine, for use in
emergencies.
Electric Tools
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Drill Bits and the Drill Chuck
Drill bits are cutting tools used to create
cylindrical holes. Bits are held in a tool
called a drill, which rotates them and
provides axial force to create the hole.
They are commonly made of high-speed
steel, while some specialized drill bits can
be made of high-carbon steel or
titanium. The drill bits are clamped into
the drill chuck using the chuck key to
tighten it. The drill motor is usually sized
by the largest diameter drill bit that will
fit into the drill chuck. Common chuck
sizes include ¼”, 3/8”, and ½”.
Electric Tools - Parts of a Drill Press
A bench-top or
stationary
power tool
used to spin a
drill at a
controlled
speed, a
controlled
location, and
to a controlled
depth. The drill
press gives
you precision
and controlled
drilling.
Electric Tools
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5 Drill Press Safety Rules
1. Be careful not to drill into the vises or drill
press table.
2. Use vises clamped to the drill press table if
there is the chance that your work piece might
spin when drilling.
3. Only change drill press speed while the drill
press is running.
4. Do not run the drill speed too fast. If you hear
any squeaking, the drill speed is too fast or you
are not plunging fast enough. Ask for help if you
are not sure what speed to use.
5. Be sure to clean up the drill press table top,
base, and surrounding floor immediately when
finished with the machine.
Hydraulic Tools
Hydraulic tools use high pressure
fluid to exert the necessary forces.
Examples of Automotive Tools that are
hydraulic include:
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Floor Jack
Transmission Jack
Bottle Jack
Vehicle Hoist
Engine Hoist
Hydraulic Tools
Floor Jack
Bottle Jack
Transmission Jack
Engine Hoist
Vehicle
Hoist
Hydraulic Press
Hydraulic Tools
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Floor Jack – Used to lift vehicles by placing under the frame,
suspension arms, or specific lift points.
Transmission Jack – Used to raise and lower transmissions during
clutch jobs and transmission repairs. It uses specially designed
attachments to hold the transmission securely to the jack and allows
the unit to be tilted as necessary to facilitate transmission installation.
Bottle Jack – Has many varied lifting applications.
Vehicle Hoist – Used to raise vehicles in order to make repairs under
the vehicle faster and more convenient.
Engine Hoist – Used to remove and install engines or other heavy
engine parts, such as intake manifolds or cylinder heads.
Hydraulic Press – used to remove, reassemble, and re-install bearings,
gears, shafts, and other subassemblies requiring great controlled
pushing or pulling force.
Other Shop Equipment
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Arbor Press – is
similar to a hydraulic
press but uses a screw
type jack to exert
force.
Other Shop Equipment
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Jack Stands – Never work under or
around a vehicle that is not properly
supported by jack stands!
Other Shop Equipment
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Engine Stand – Once the engine has been
removed from the vehicle, it can be mounted
securely to an engine stand to facilitate working
on the engine.
Other Shop Equipment
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Cold Solvent Tank – contains a cleaning solution
used to sanitize automotive parts and
subassemblies before repair and reinstallation.
Other Shop Equipment
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Pressure Washer - A pressure washer
is an engine powered device that uses
high-pressure water to remove deposits of
dirt and grease from automotive
assemblies and subassemblies.
Other Shop Equipment
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Oxy-Acetylene Torch - An Oxy-Acetylene torch
is used to weld metals. Welding metal results when
two pieces are heated to a temperature that
produces a shared pool of molten metal. The molten
pool is generally supplied with additional metal
called filler. Filler material depends upon the metals
to be welded.
In Oxy-fuel cutting, a cutting torch is used to heat
metal to kindling temperature. A stream of oxygen
then trained on the metal combines with the metal
which then flows out of the cut (kerf) as an oxide
slag
Oxy-fuel welders can also be used for heating and
bending metals. By controlling the rate of cool
down different hardness of metal can be achieved.
Other Shop Equipment
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Oxy-Acetylene Torch
Other Shop Equipment
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Battery Charger - An electronic device that
provides a controlled voltage and current to a
battery to maintain the battery in a fully
charged state
CAUTION!
Car batteries that are being charged,
give off hydrogen gas which is
flammable and explosive. Keep
open flame and sparks away from
battery! Always unplug charger before
disconnecting clamps from battery!
Other Shop Equipment
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Drop Light - provides light when
working under the hood or under a
vehicle.
Other Shop Equipment
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Jumper Cables – can be used to
start a vehicle with a dead battery by
connecting to another vehicle that
has a good battery.
Other Shop Equipment
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Creeper - is used by a technician to lay
on when working under a vehicle, and
should always be stood up out of the
way when not in use.
Other Shop Equipment
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Tool Carts – or Utility Carts are used
to hold a limited number of tools for
easy access for a specific task.
Other Shop Equipment
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Fender Covers - protect the finish
and visual appearance on any
vehicle being worked on.
QUESTIONS?
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CHECK THE TEXTBOOK IF YOU CAN NOT
FIND SOME OF THE ANSWERS!
THEN CHECK WITH THREE OTHER
STUDENTS TO FIND THE ANSWERS!
FINALLY, CHECK WITH THE INSTRUCTOR
Sincerely, Mr. Bloom