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Questions and Answers
Which type of tool has more than one cutting edge?
Which type of tool has more than one cutting edge?
- Rotating multiple cutting edge tool (correct)
- Tool with a rounded nose radius
- Tool with a dominant cutting edge
- Single-point tool
What is the primary cause of fracture failure in cutting tools?
What is the primary cause of fracture failure in cutting tools?
- Gradual wearing of the tool
- Excessive cutting temperature
- Low cutting force
- Dynamic cutting force (correct)
What happens to approximately 98% of the energy in machining?
What happens to approximately 98% of the energy in machining?
- It is retained as elastic energy in the chip
- It causes excessive cutting force
- It is converted into heat (correct)
- It leads to gradual wear of the tool
What is the purpose of the rounded nose radius in single-point tools?
What is the purpose of the rounded nose radius in single-point tools?
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What is the primary mode of tool failure caused by excessively high cutting temperature?
What is the primary mode of tool failure caused by excessively high cutting temperature?
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Study Notes
Cutting Tools
- A multi-point tool has more than one cutting edge.
Fracture Failure
- The primary cause of fracture failure in cutting tools is brittle fracture.
Energy in Machining
- Approximately 98% of the energy in machining is converted into heat.
Single-Point Tools
- The purpose of the rounded nose radius in single-point tools is to strengthen the tool and reduce the risk of chipping or cracking.
Tool Failure
- Excessively high cutting temperature can cause tool failure primarily through thermal softening.
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