Reading Assignment
- 28.1 Abrasive Machining Processes
- 28.2 Abrasives
- 28.3 Grinding Wheel Structure and Grade
- 28.4 Fundamentals of Broaching
- 28.5 Grinding Machines
- 28.6 Honing
- 28.7 Superfinishing
- 28.8 Free Abrasives
Recommended Reading/videos
- Handbook of Machining with Grinding Wheels (book preview)
- Grinding Technology: Theory and Applications of Machining with Abrasives (book preview)
- Study Guide – Abrasives
- Grinding Tool Steels
- American Machinist “Lapping and Honing”
- ID and OD Lapping Simplified (Video)
- Hand Lapping (Video)
- A Lab Grown Diamond is Forever (article)
Cutting Tool Engineering Magazine Videos:
- Episode 1 – Coolant Velocity Vs. Flowrate
- Episode 2 – Ceramic Abrasive Luck?
- Episode 3 – The Right Grit
- Episode 4 – Rotary Diamond Dressing
- Episode 5 – Cluster Diamond Dressers
- Episode 6 – Cylindrical OD Grinding
- Episode 7 – Cylindrical OD Plunge Grinding
- Episode 8 – Deep Dress, Deep Cuts
- Episode 9 – Wheel Sticking
- Episode 10 – Overloaded Wheel?
- More…
Outline
Abrasive Machining
Abrasives may be
- Free
- Mounted in resin to belt or paper
- Bonded into wheels, stones, segments, or disks
- Wheels may be mounted on shafts
Characteristics of Abrasives
- Hardness
- Attrition
- Friability
Abrasive Materials
Natural (Traditional)
- Sandstone
- Emery (alumina and magnetite)
- Corundum (naturally occurring aluminum oxide)
Natural (Still used today)
- Quartz Sand
- Garnets
- Diamond
- Used to sharpen carbide and ceramic cutting tools
- Used for truing and dressing other abrasive wheels
Artificial Abrasives
- Aluminum Oxide
- General Purpose
- Widely Used
- Silicon Carbide
- CBN
Abrasive Geometry
Rake angle varies widely
Abrasive machining action is a combination of
- Cutting
- Plowing
- Rubbing
Grinding Wheel Identification and Selection
Wheel Types
- Peripheral Grinding Wheels
- Face Grinding Wheels
Marking System
- Manufacturer’s Abrasive Prefix
- Abrasive Type (A60-M5-V)
- Abrasive Size (A60-M5-V)
- Grade/Hardness (A60-M5-V)
- Structure (A60-M5-V)
- Bond (A60-M5-V)
- Manufacturer’s Code
Abrasive Processes
Grinding
Surface Grinding
Blanchard Grinding
Cylindrical Grinding
Centerless Grinding
ID Grinding
Abrasive Flow Machining
Abrasive Waterjet Cutting
Sandblasting
Tool Grinding
Snagging
Creep-Feed Grinding
Lapping
Superfinishing
Dressing and Truing
Grinding Wheel Safety
——
http://www.youtube.com/user/CTEplus#p/u/19/zbZPJdwU6wM
A shop grinding tungsten carbide with a resin-bonded diamond wheel asked the Grinding Doc about the difference between two conditioning sticks purchased from two differrent suppliers. With one stick the shop can do a lot more parts between stickings.
http://www.youtube.com/watch?v=LfoJ5exCY0w (sticking a wheel)
