Computer Aided Manufacturing 1 Exam
Questions and Answers 100% Solved
List the machining parameters affecting tool life. - ✔✔Depth of Cut, Feed
per tooth, and Cutting Speed
Describe the effect of the following on tool life including any sketches you
deem necessary - ✔✔a. Depth of Cut (Smaller cut means a longer tool life,
Increasing Depth by 50% typically decreases tool life by 15%.Usually
advantageous trade off)
b. Feed Rate (The faster the feed, the more wear will occur on the tip of the
tool; lower feed to increase tool life. Typically, feed increase of 50% causes
60% reduction in tool life. Not an advantageous trade off)
c. Speed (Tool life is extremely sensitive to the cutting speed, Higher speed
means a lower tool life. Cutting speed increase causes higher temperatures
1
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, on the tool tip. A 50% increase in speed will cause a 90% reduction in tool
life. Not an advantageous trade off)
Arrange the following parameters in order of their effect on tool life from the
highest to the lowest: Depth of cut, feed rate, speed. - ✔✔Feed Rate,
Cutting Speed, Depth of Cut
Explain the HI-E (High Efficiency) range of cutting speeds? - ✔✔Between
max production and min cost
List the parameters you would consider in choosing a tool holder or a
boring bar. - ✔✔A boring bar will yield more accuracy, less deflection, and
a better surface finish than the tool holder
List the basic differences between tool holders and boring bars - ✔✔a. Tool
holders only can work on OD. They have square cross sections
b. Boring bars work on the ID. They have more clearance for chips. A
boring bar will have more accuracy, less deflection, and a better surface
finish
What is the location of the cutting tip in relationship to the body of a tool
holder and boring bar? Why? - ✔✔a. The cutting tip is connected to the
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
Questions and Answers 100% Solved
List the machining parameters affecting tool life. - ✔✔Depth of Cut, Feed
per tooth, and Cutting Speed
Describe the effect of the following on tool life including any sketches you
deem necessary - ✔✔a. Depth of Cut (Smaller cut means a longer tool life,
Increasing Depth by 50% typically decreases tool life by 15%.Usually
advantageous trade off)
b. Feed Rate (The faster the feed, the more wear will occur on the tip of the
tool; lower feed to increase tool life. Typically, feed increase of 50% causes
60% reduction in tool life. Not an advantageous trade off)
c. Speed (Tool life is extremely sensitive to the cutting speed, Higher speed
means a lower tool life. Cutting speed increase causes higher temperatures
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, on the tool tip. A 50% increase in speed will cause a 90% reduction in tool
life. Not an advantageous trade off)
Arrange the following parameters in order of their effect on tool life from the
highest to the lowest: Depth of cut, feed rate, speed. - ✔✔Feed Rate,
Cutting Speed, Depth of Cut
Explain the HI-E (High Efficiency) range of cutting speeds? - ✔✔Between
max production and min cost
List the parameters you would consider in choosing a tool holder or a
boring bar. - ✔✔A boring bar will yield more accuracy, less deflection, and
a better surface finish than the tool holder
List the basic differences between tool holders and boring bars - ✔✔a. Tool
holders only can work on OD. They have square cross sections
b. Boring bars work on the ID. They have more clearance for chips. A
boring bar will have more accuracy, less deflection, and a better surface
finish
What is the location of the cutting tip in relationship to the body of a tool
holder and boring bar? Why? - ✔✔a. The cutting tip is connected to the
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
