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Grinding

  1. Aluminum Oxide:

    What are Aluminum Oxide grinding wheels mainly used for?
    • High tensile strength materials
    • Including all ferrous metals except cast iron.
  2. Aluminum Oxide:

    What colours do Aluminum Oxide wheels general come in?
    grey-ish to white in colour, with the latter being the purest and most brittle.
  3. Manufacture of Aluminum Oxide:

    From what Ore is Aluminum Oxide made?
    Bauxite Ore
  4. Silicon Carbide:

    What are Silicon Carbide grinding wheels mainly used for?
    • Low tensile strength materials: Aluminum, Brass, and Bronze
    • High density materials: Cemented carbides, stone, and ceramics
    • Cast iron and non ferrous ramics
  5. Silicon Carbide:

    What colours do Silicon Carbide wheels generally come in?
    Green to black
  6. Silicon Carbide:

    What are green Silicon Carbide grinding wheels generally used for?
    Cemented carbides and other hard materials
  7. Silicon Carbide:

    What are black Silicon Carbide grinding wheels generally used for?
    • Soft nonferrous materials: Aluminum, brass, and copper
    • Cast iron
    • Ceramics
  8. Manufacture of Silicon Carbide:

    What are the main ingredients used to make Silicon Carbide grinding wheels?
    A mixture of Silica sand and high-purity coke.
  9. Zirconia-Aluminum Oxide:

    What are Zirconia-Aluminum Oxide grinding wheels generally used for?
    • Heavy duty rough and finish grinding in steel mills
    • Snagging in foundries
    • The rapid rough and finish grinding of welds in metal fabrications plants
  10. Zirconia-Aluminum Oxide:

    What advantages does Zirconia-Aluminum Oxide have over standard Aluminum Oxide grinding wheels?
    • Higher grain strength
    • Higher impact strength
    • Longer grain life
    • Maintains its shape and cutting ability under high pressure and temperature
  11. Boron Carbide:

    What is the abrasive Boron Carbide used for?
    • It is used as a loose abrasive: as it is not suitable for use in grinding wheels
    • Used in the manufacture of precision gages and sand blast nozzles: because of its extreme hardness
    • Crush dressing rolls: superior to tungsten carbide rolls
    • A relatively cheap substitute for diamond dust
  12. Manufactured Diamonds:

    What is the main element used in Man-Made Diamonds?
    Carbon
  13. Manufactured Diamonds:

    Name 3 types of Man-Made Diamonds?
    • RVG
    • MBG-II
    • MBG
  14. Diamond Types:

    For the diamond type RVG, the letters RVG indicate what?
    That this type may be used with a resinoid or vitrified bond grinding
  15. Diamond Types:

    For the diamond type MBG, the letters MBG indicate what?
    That this type is used in metal-bonded grinding
  16. Ceramic Aluminum Oxide:

    What is the major difference between Ceramic Aluminum Oxide and that of both Aluminum Oxide and Zirconia-Aluminum Oxide wheels?
    • Ceramic Aluminum Oxide: submicron-sized particles are sintered to provide a single abrasive grain.
    • ZAO and AO: made from fused aluminum oxide which is then crushed is then crushed to the desired particle size.
  17. Grinding Wheels:

    What are the four main components of a grinding wheel?
    • Abrasive grain
    • Bond
    • Grade
    • Structure
  18. Abrasive Grain:

    What is the function of the abrasive?
    To remove material from the surface of the work being ground
  19. Abrasive Grain:

    How is grain size determined?
    by the number of meshes per linear inch that are on a screen that the grain can pass thur.
  20. Abrasive Grain:

    What grain size range does the label "Very Coarse" cover?
    6 to 12 grain size
  21. Abrasive Grain:

    What grain size range does the label "Coarse" cover?
    14 to 24 grain size
  22. Abrasive Grain:

    What grain size range does the label "Medium" cover?
    30 to 60 grain size
  23. Abrasive Grain:

    What grain size range does the label "Fine" cover?
    70 to 120 grain size
  24. Abrasive Grain:

    What grain size range does the label "Very Fine" cover?
    150 to 240 grain size
  25. Abrasive Grain:

    What grain size range does the label "Flour Size" cover?
    280 to 600 grain size
  26. Abrasive Grain:

    What grain size range is appropriate for rough grinding?
    8 to 54 grain size
  27. Abrasive Grain:

    What grain size range is appropriate for precision grinding processes?
    54 to 400 grain size
  28. Abrasive Grain:

    What grain size range is appropriate for ultra precise grinding requiring 2 to 4 μ finish or finer?
    320 to 2000 grain size
  29. Abrasive Grain:

    When rapid removal of metal is required, what type of grain should be used?
    Coarse grain
  30. Abrasive Grain:
    When smooth and accurate finishes are required, what type of grain should be used?
    fine grain
  31. Abrasive Grain:

    Generally when grinding soft materials, what grain should be used?
    coarse grain
  32. Abrasive Grain:

    Generally when grinding hard materials, what grain should be used?
    fine grain
  33. Abrasive Grain:

    When large amounts of material is to be removed, what type of grain is used?
    Coarse grain
  34. Abrasive Grain:

    When large amounts of material is to be removed, what type of grain is used?
    Coarse grain
  35. When making finishing passes, what type of grain is used?
    Fine grain
  36. Abrasive Grain:

    When the wheel is making a large area of contact, what type of grain should be used?
    Coarse grain
  37. Abrasive Grain:

    When the wheel is making a small area of contact, what type of grain should be used?
    Fine grain
  38. Bond Types:

    What 2 bond types are best suited for rapid removal of material?
    Vitrified and Resinoid bonds
  39. Bond Types:

    What 2 bond types are best suited for high finishes?
    Rubber and Shellac bonds
  40. Bond Types:

    What bond type is best suited for keeping heat generated to a minimum?
    Silicated bond
  41. Bond Types:

    What bond type is used mainly on diamond wheels?
    Metal bonds
  42. Grade:

    The grade of a grinding wheel may be defined are what?
    As the degree of strength with which the bond holds the abrasive particles in the bond.
  43. Grade:

    Hardness of material:
    A hard grade wheel is generally used on, what type of material?
    soft material
  44. Grade:

    hardness of material:
    A soft grade wheel is generally used on, what type of material?
    hard material
  45. Grade:

    How are wheel grade symbols indicated, and what is the softest and hardest on the scale?
    • wheel grade symbols are indicated alphabetically, ranging from A to Z
    • A is the softest
    • Z is the hardest
  46. Grade:

    If the area of contact between the wheel and the workpiece is large, what grade of wheel should be used?
    soft grade wheel (A)
  47. Grade:

    If the area of contact between the wheel and the workpiece is small, what grade of wheel should be used?
    hard grade wheel (Z)
  48. Structure:

    How is the structure of a grinding wheel indicated and which is the most dense and open structures?
    • The structure of a grinding wheel is indicated by numbers ranging from 1 to 15
    • 1 is the most dense
    • 15 is the most open
  49. Structure:

    Soft materials will require a wheel with what type of structure?
    open structure (15)
  50. Structure:

    Hard material will require a wheel with what type of structure?
    dense structure (1)
  51. Structure:


    A greater area of contact will require a wheel with what type of structure?
    open structure (15)
  52. Structure:

    Which structure provides a better finish?
    A dense structure will produce a better finish
  53. Standard Grinding Wheel Shapes:

    Image Upload 1
    Straight (Type 1)
  54. Standard Grinding Wheel Shapes:

    Image Upload 2
    Cylinder (Type 2)
  55. Standard Grinding Wheel Shapes:

    Image Upload 3
    Tapered; both sides (Type 4)
  56. Standard Grinding Wheel Shapes:

    Image Upload 4
    Recessed; one side (Type 5)
  57. Standard Grinding Wheel Shapes:

    Image Upload 5
    Straight Cup (Type 6)
  58. Standard Grinding Wheel Shapes:

    Image Upload 6
    Recessed; both sides (Type 7)
  59. Standard Grinding Wheel Shapes:

    Image Upload 7
    Flaring cup (Type 11)
  60. Standard Grinding Wheel Shapes:

    Image Upload 8
    Dish (Type 12)
  61. Standard Grinding Wheel Shapes:

    Image Upload 9
    Saucer (Type 13)
  62. Types of Surface Grinders:

    Image Upload 10
    • Horizontal Spindle
    • Reciprocating table
  63. Types of Surface Grinders:

    Image Upload 11
    • Horizontal Spindle
    • Rotary Table
  64. Types of Surface Grinders:

    Image Upload 12
    • Vertical Spindle
    • Rotary Table
  65. Types of Surface Grinders:

    Image Upload 13
    • Vertical Spindle
    • Reciprocating Table
  66. Types of Surface Grinders:

    What advantage do vertical spindles have over horizontal spindles?
    vertical spindle grinders have a higher metal-removal rate
  67. Truing and Dressing a Grinding Wheel:

    Define the Process of Truing a wheel.
    Truing is the process of making a grinding wheel round and concentric with its spindle axis and producing the required from or shape on the wheel.
  68. Truing and Dressing a Grinding Wheel:


    Define the process of Dressing a wheel.
    Dressing a wheel is the operation of removing the dull grains and metal particles.
  69. Truing and Dressing a Grinding Wheel:


    At roughly what angle is the diamond on a diamond dresser tilted from the vertical?
    10° (5° to 15°)
  70. Truing and Dressing a Grinding Wheel:

    Describe how a diamond dresser is set for dressing a grinding wheel?
    The diamond is pointed in the direct of the wheel's rotation and then moved past the wheel's center.
  71. Work holding devices:

    Name the 2 types of magnetic chucks used on surface grinders.
    • Electromagnetic chuck
    • Permanent magnetic chuck
  72. Magnetic Chuck Accessories:

    What is an adapter plate used for?
    • an adapter plate is used to securely hold thin work, less than 1/4 or 6mm thick
    • it converts wider pole spacing of the chuck to finer spacing with more but weaker flux paths
  73. Magnetic Chuck Accessories:

    What are Magnetic chuck blocks used for?
    They provide a way to extend the flux paths to hold workpieces that cannot be held securely on the chuck face
Author
joshuacassel
ID
316569
Card Set
Grinding
Description
for studying grinding for the CofQ
Updated

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