Term
| Types of Surface Grinders? |
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Definition
-Horizontal w/ Reciprocating Table
-Horizontal Spindle w/ Rotary Table
-Vertical Spindle w/ Reciprocating Table
-Vertical Spindle w/ Rotary Table |
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Term
| What are the 2 types of magnetic chucks? |
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Definition
| Electromagnetic and Permanent |
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Term
| What is a major drawback of electromagnetic chucks? |
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Definition
| Uses electricity to create magnetic field. So if power fails the grinding wheel will throw the part off table. |
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Term
| What supports work pieces having odd shapes? and what type of machining operation are they used for? |
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Definition
| Magnetic chuck blocks, For light machining operations. |
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Term
| What is the purpose of an adapter plate? |
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Definition
| Holds work pieces with thin cross sections. Changes the wide pole spacing to a finer spacing with many more poles. |
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Term
| Types of grinding fluids? |
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Definition
-Soluble oil and Water
-Chemical Grinding Fluids
-Straight Grinding Oil |
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Term
| What type of grinding fluid is for moderate to heavy stock removal? What about for light to moderate? |
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Definition
Chemical Grinding Fluids(Moderate-Heavy)
Soluble oil and water(Light-Moderate) |
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Term
| What are the methods of delivering coolant? |
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Definition
-Flood cooling(Coolant between wheel and part
-Through the wheel cooling systems(Most effective)
-Mist Cooling System |
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Term
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Definition
| Its a process of imparting a contour onto a wheel face using a hardened steel or carbide roller. |
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Term
| What is creep grinding? and what is it good for? |
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Definition
| Creep grinding is used for very large depths of cut with a very slow feed. |
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Term
| What do you need in order to creep grind? |
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Definition
| A table with a positive mechanical drive, more horsepower, more rigidity and a open structure wheel because of the high area contact. |
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Term
| What would cause burning or discoloration when surface grinding? and What is a solution? |
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Definition
-Cause: Wheel grade to hard
-Solution:
Use coolant, increase work speed, decrease wheel speed and use softer grade wheel. |
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Term
| What causes a burnished work surface when surface grinding? Solution? |
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Definition
-Cause: Glazing
-Solution:
Dress the wheel or use more open structure wheel. |
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Term
| What causes chatter or wavy patterns when surface grinding? |
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Definition
-Cause:
Wheel is out of balance or too hard of wheel. |
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Term
| Types of Cylindrical Grinders? |
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Definition
| Centre (One off jobs) and Centreless (Production) |
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Term
| Types of centre grinders? |
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Definition
| Plain centre grinder and Universal Centre Grinder |
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Term
| What is special about the universal centre grinder? |
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Definition
| The wheel head can be swiveled 180 degrees in either direction(For tapers). and there is an internal grinding spindle that can be swung down to grind internal parts. |
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Term
| How do you introduce a diamond dresser to the wheel. |
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Definition
| Mount the diamond in holder. Then mount holder to table and feed past wheel. Diamond should have 10-15 Drag angle and be mounted slightly past centre of wheel. .001" passes |
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Term
| What is the traverse speed set to on a cylindrical grinder? |
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Definition
1/2-2/3 width of wheel for roughing.
1/8-1/3 width of wheel for finishing |
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Term
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Definition
| When the wheel head is fed straight into workpiece. Used to grind steep taper or irregular profile. |
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Term
| What can cause a barber pole finish when cylindrical grinding? |
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Definition
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Term
| Tools used for dressing and truing wheels? |
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Definition
Star wheel dressers
Abrasive sticks and wheels
Diamond Dressers |
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Term
| What would be used to true and dress an offhand grinder? |
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Definition
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Term
| Where would abrasive sticks and wheels be used? What are they made of? |
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Definition
| On a tool and cutter grinder. Made of silicone carbide with a hard bond. |
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Term
| What are the steps to installing a grinding wheel? |
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Definition
| Inspecting, mounting, balancing, truing and dressing, and secondary truing and balancing |
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Term
| What are CBN and Diamond classified as? |
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Definition
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Term
| What causes wheel glazing? |
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Definition
| To hard of a wheel makes abrasive dull |
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Term
| How does the grade of a bond affect the wheel? |
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Definition
| A hard bond exposes new cutting abrasives |
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