Topic outline

  • WELCOME

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  • INTRODUCTION

    What is this course about?

    This unit covers the knowledge, skill and attitude required to setup and grind cutting tool. It includes the requirements for grinding parallel surfaces, square surfaces, angles, radii and cutting off parts

    Course Structure

     REQUIREMENT

    GRINDING OPERATION 

    COMPLETION

    OSH

    Practice Materials for the Grinding Job symbol

    Angles to a square shoulder

    Different form

    (radius nose, square nose,

    V nose to cut)

    Complete safe

    shutdown

    House keeping

    procedures

    Learning Objective

    You will learn the steps to perform how to grind a metal radius nose, square nose, V nose to cut etc.

    Teacher

    Miss Rafia Sultana

  • GRINDING SAFETY EQUIPMENT

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  • GRINDING WHEEL & ACCESSORIES

    WHEELS

    SILICON & ALUMINIUM CARBIDE:

    Silicon carbide is an abrasive used for grinding gray iron, chilled iron, brass, soft bronze and aluminum, as well as stone, rubber and other non-ferrous materials. Ceramic aluminum oxide is the newest major development in abrasives.

    ACCESSORIES:

    Image result for what is Wheel dresser Image result for what is diamond pen of grinding

    WHEEL DRESSER 

    A grinding dresser or wheel dresser is a tool to dress the surface of a grinding wheel. Grinding dressers are used to return a wheel to its original round shape, to expose fresh grains for renewed cutting action, or to make a different profile on the wheel's edge. 

    DIAMOND PEN

    Diamond pen is a new type of grinding wheel tool. Using powder metallurgy hot pressing process, the matrix alloy has good abrasion resistance and high strength
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  • GRINDING MACHINE

    PEDESTAL GRINDER:

    A bench grinder is a benchtop type of grinding machine used to drive abrasive wheels. A pedestal grinder is a similar or larger version of grinder that is mounted on a pedestal,which may be bolted to the floor or may sit on rubber feet. 

    Image result for pedestal grinder

  • Perform in grinding operation

                         Angles to a square shoulder Operation

                       Radius Nose Operation

                         Square Nose Operation

                             V Nose Operation

  • COMPLETE SAFE ShOUTDOWN

        The three main rules of handle Norite grinding wheels are “do noakt roll ”, “do not drop” and “do not bump.”
    1. Grinding wheels should be stored in dry locations and on shelves.
    2. Before attaching on a machine you should perform a visual inspection and ring test. This will ensure that there are no cracks, splitting or chipped areas.
    3. Make sure that the maximum speed and size indication on the wheel correspond to the machine.
    4. Place Flange with the outer diameter and contact width are equal on both sides. Check to make sure you have the correct flange size before installing.
    5. Use the blotters that come with the grinding wheel to insure proper installation. Make sure the flange diameters are larger than the blotters.
    6. After installing flange balance the wheel with the proper weight distribution.
    7. Ensure a gap of 3 mm or less between the wheel and work rest piece. Make sure to leave a gap of 3 to 10 mm between the wheel and the adjustable torque.
    8. The wheel mounting point should be used with a wheel axle lengths of 13 mm.
    9. A proper wheel shield should cover at least half of the grinding wheel diameter.
    10. After installation of a grinding wheels a pre-operation run should occur for at least one minute before grinding starts, and at least three minutes after replacing a grinding wheel. Portable grinders should be test-operated in a safe location.
    11. Safety equipment including PPE and dust-proof masks should be worn during grinding operation at all times.
    12. To prevent imbalance of the grinding wheel shut down coolant flow before stopping the wheel. Allow the grinding wheel to continue rotating in order to dry.
    13. Friction sparks should be contain by a screen or operation guard.
    14. Proper ventilation is highly recommended to prevent respiratory illnesses.

  • COURSE EVALUATiON