1. Manufacturing Engineering
4th Edition
Chapter 12
Manufacturing Engineering

2. Basic Metal Cutting Operations
We Cover Three Topics
Shop Safety
Basic Metal Cutting Operations
Speeds and Feeds
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3. To Be Safe - Think!
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4. Basic Safety Rules Wear eye protection at all times
No loose-fitting clothing or jewelry
Do not work alone
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5. Ask Someone If You Are Have Questions
= ?
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6. Traditional Machining Operations
Turning
Milling
Drilling
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7. Typical Drill Press
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8. On Lathes The Part Rotates
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9. On Milling Machines The Cutter Rotates
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10. Two Types Of Milling Conventional Milling Climb Milling
Cutter
Cutter
Part
Part
Conventional Milling
Climb Milling
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11. Climb Milling
Cutter
Both the cutter and the lead screw move the table in the same direction
Part
Climb Milling
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12. Speeds And Feeds Are Like Biting And Chewing
Speed: how fast the cutting tool (or part) spins
Feed Rate: how hast the part is advanced into the part
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13. Manufacturers Have Recommended Cutting Speeds
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14. Calculating The Cutting RPM
Same equation for drill press, mill, and lathe
Where RPM = revolutions per minute for the cutting tool (mill and drill) or work piece (lathe) CS = cutting speed in surface feet per minute Dia = diameter in inches for the cutting tool (mill and drill) or work piece (lathe)
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15. The Feed Rate For Milling
Chip load values are found in tables (check Machineries Handbook)
We will use IPT for high speed steel cutting steel
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16. The Feed Rate For Turning (Lathe)
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17. Summary
Manufacturing is the process of converting (either by manual labor or by machines) raw materials into finished products, especially in large quantities.
Manufactured goods are everywhere - aircraft, bicycles, electronics, coat hangers, automobiles, refrigerators, toys, clothing, cans, bottles, cell phones, and so on.
Statistical methods are important for the control of processes. Manufacturing processes are not exactly on specification but have a scatter about their mean.
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