Grinding Flashcards
Who published the video?
Society of Manufacturing Engineers
How is grinding defined in the video?
A material removal and surface generating process used to shape and finish metal components or non metals
How many phases are there in grinding and what are they?
2
Roughing phase - to remove most of the material
Finishing phase - to resolve any distortion and improve surface finish
For the first grinding process how many hoses for lubricant?
3
What are the two processes shown in the first video section?
Cylindircal Grinding & Lapping
In the ABRASIVE AND GRINDING WHEEL section what is stated for grinding to be successful?
Harder than workpiece, Shock Resistant, Heat Resistant, and Capable of Fracturing/Friable
What natural abrasives have been replaced?
Quartz &Emerey
What abrasive is used in 3/4 of abrasives?
Aluminum Oxide
What is th next common abrasive apart from aluminum oxide?
Silicon Carbide
What is Silicon Carbide used for?
Softer Metals, Non-Ferrous Metals, and High Density Materials like ceramics and cemented carbide
What are the super abrasives used in 5% of grinding applications?
Cubic Boron Nitride & Diamond which are the hardest of all materials
What is CBN used to grind?
Hard Ferrous Materials
What is diamond used to grind?
Non-Ferrous materials and Non-metals
What are the types of bindiers that hold abrasive grain?
Vitrified Bonds (Glass), Organic Bonds (Rubber), Metal and Single Layer Bond (Super abrasives)
What happens if a wheel’s bond is too hard?
Wheel will wear slowly, fail to release dull cutting edges, cut inefficiently and cause overheating
What happens if the bond is too weak?
Grains are lost too soon and wheel wears to quickyl/uneconomically
What happens when chips are not removed but retained what is this called?
Glazing
What does porosity between grains do?
Provide coolant retention and chip clearance
What are open wheels mainly used for?
Grindng soft materials, large work areas, and for minimizing heat
What are dense wheels used for in griding?
Hard meterials and finer finishes
What three closely related properties determine how well a wheel will cut?
Grain size, Bond type, and pore space
what are the different types of cylindrical wheel shapes shown in the video?
4 types: straight wheel, cylinder wheel, straight cup wheel, and flare cup wheel
what are other common types of grinding wheel described in the video?
Centerless wheel, mounted point, and cut-off wheel
