Rotary Cutting Tool

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Rotary Cutting Tool

• History and Analysis

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What is it?

• Simple device that uses circular blade spinning
  at high speed to cut

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How does it work?

• 1 Air intake through groove and slot
• 2 Expansion, fin deployment
• 3 Full gas expansion
• 4 Gas exhausts at lower pressure

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Where did it come from?

• 1588 Water pump with reciprocating slide valves
• 1769 Mercury and steam rotary engine
• 1899 Rotary motor with sliding vane
• 2001 Rotary cutting tool patented

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How much air does it use?

• Choke flow rate
• Air use at 620 kPa

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How fast does it operate?

• Choke rate limits mass intake, RPMs
• RPM

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What have I learned?

• Fluid Mechanics
• Problem solving
• Modeling