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Power Tools

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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 ... – PowerPoint PPT presentation

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Title: Power Tools


1
Power Tools Equipment
  • Chapter 4

2
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.

3
Compressed Air Systems
  • The recommended maximum operating air pressure
    for a shop is 150psi.

4
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.

5
Compressed Air Systems
  • Air Pressure Regulator
  • A pressure regulator automatically sets and
    controls the compressors 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.

6
Typical Compressed Air System
Compressor
7
Air Tools
  • 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.

8
Air Tools
  • 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.

9
Air Tools
  • Air Ratchet-
  • An air ratchet is used to work in hard-to-reach
    places where other tools might be difficult or
    impossible to use. The drive-end 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.
10
Air Tools
  • 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.

11
Air Tools
  • Solvent Gun-
  • A 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 Gun-
  • An 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.

12
Air Tools
  • Air Drill-
  • Features 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.

13
Electric Tools
  • Bench Grinder-
  • Usually 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 work-pieces.

14
Electric Tools
  • Bench Grinder Safety Rules
  • 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.

15
Electric Tools
  • 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.

16
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.
17
Electric Tools
  • 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.

18
Hydraulic Tools
  • Hydraulic tools use high pressure fluid to exert
    the necessary forces. Examples of Automotive
    Tools that are hydraulic include
  • Floor Jack
  • Transmission Jack
  • Bottle Jack
  • Vehicle Hoist
  • Engine Hoist

19
Hydraulic Tools
Floor Jack
Bottle Jack
Transmission Jack
Engine Hoist
Vehicle Hoist
Hydraulic Press
20
Hydraulic Tools
  • 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.

21
Other Shop Equipment
  • Arbor Press is similar to a hydraulic press but
    uses a screw type jack to exert force.

22
Other Shop Equipment
  • Jack Stands Never work under or around a
    vehicle that is not properly supported by jack
    stands!

23
Other Shop Equipment
  • 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.

24
Other Shop Equipment
  • Cold Solvent Tank contains a cleaning solution
    used to sanitize automotive parts and
    subassemblies before repair and reinstallation.

25
Other Shop Equipment
  • 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.

26
Other Shop Equipment
  • 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.

27
Other Shop Equipment
  • Oxy-Acetylene Torch

28
Other Shop Equipment
  • 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!
29
Other Shop Equipment
  • Drop Light - provides light when working under
    the hood or under a vehicle.

30
Other Shop Equipment
  • Jumper Cables can be used to start a vehicle
    with a dead battery by connecting to another
    vehicle that has a good battery.

31
Other Shop Equipment
  • 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.

32
Other Shop Equipment
  • Tool Carts or Utility Carts are used to hold a
    limited number of tools for easy access for a
    specific task.

33
Other Shop Equipment
  • Fender Covers - protect the finish and visual
    appearance on any vehicle being worked on.

34
QUESTIONS?
  • 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
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