This process is when abrasive particles are contained in a bonded grinding wheel.
Used as a FINISHING operation after machining.
MOST IMPORTANT abrasive process.
Grinding
100
The relative spacing of abrasive grains in the wheel
Wheel Structure
100
These are all _______
grain fracture
attritious wear
bond fracture
Causes of Wheel Wear
100
This wheel SHARPENING process is accomplished by rotating a disk/stick or grinding wheel against the wheel as it rotates.
Dressing
100
Depth of cut is many times greater than the conventional surface grinding.
For high volume removal.
Creeper Feed Grinding
200
This OBJECT consists of abrasive particles and bonding material.
Particles accomplish the cutting.
Bonding materials holds the particles, establishes shape and structure.
Parameters: material, grain size, bonding material, grade/structure
Grinding Wheel
200
Bond strength in retaining abrasive grits.
This depends on the amount of bonding material.
Measured on scale of "soft" to "hard"
soft- loses grains readily
hard-retains grains readily
Wheel Grade
200
The capacity to fracture when the cutting edge dulls, so a new sharp edge is exposed
also called grain fracture
Friability
200
This WHEEL SHARPENING process uses a diamond pointed tool fed slowly and precisely across the wheel.
Ensures straightness across the outside perimeter.
Truing
200
This process is performed by a set of bonded abrasive sticks using a combination of rotational and oscillatory motions
Creates a cross-hatched surface that retains lubrication due to a "figure 8" motion
Honing
300
Traditional materials include: Al3O, and Si2C.
New materials include B3NO2 and diamond.
This material is on the grinding wheel.
Abrasive material.
300
Wheel marking system.
Designates abrasive type, grit size, grade structure, bond material, etc.
Grinding Wheel Specification
300
This type of grinding is on the exterior of the surface
External Grinding
300
This process uses fluid suspension of very small particles between a workpiece and the tool
_____ compound--> fluid with abrasives, like a liquidy paste for polishing
Lapping
400
small grain will take a smaller bite...
large grain will take a larger bite..
grain size (grit size)
400
Achieved by small grain sizes, high wheel speeds and dense wheel structure (lots of grains)
Surface Finish
400
When individual grains are pulled out of the bonding material
Bond Fracture
400
This type of grinding is done on the interior of the surface
Internal Grinding
500
This must withstand centrifugal forces and high temperatures.
Must resist shattering.
Must be able to hold abrasive grains, yet let them break when needed.
Bonding Material
500
Power required to cut a specific work material
(horse power)
Specific Energy
500
What is the following equation??
GR=Vr/Vs
Grinding Ratio
500
These are used to check dimensions before a machining process....
Have tiny slots so that they can interlock....
They are lapped as a finishing process...