Cutting-Tool Technology and Related Topics Review Questions Flashcards Preview

MFE-201 Manufacturing Systems Processes > Cutting-Tool Technology and Related Topics Review Questions > Flashcards

Flashcards in Cutting-Tool Technology and Related Topics Review Questions Deck (21)
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1

What are the 2 principal aspects of cutting-tool technology?

  • tool material
  • tool geometry

2

Name the 3 modes of tool failure in machining

  • FRACTURE FAILURE
  • TEMPERATURE FAILURE
  • GRADUAL WEAR

3

What are 2 principal locations on a cutting tool where tool wear occurs

  • Top Face of cutting tool
    • crater wear
    • side/flank wear
  • Tool Point
    • nose radius wear

4

Identify mechanisms by which cutting tools wear during machining

  • abrasion
  • adhesion
  • diffusiom
  • plasticdeformation of the cutting edge

5

What is the physical interpretation of the parameter C in the Taylor's tool life euqation

C repsresents the cutting speed

6

Identify 3 desirable properties of a cutting tool material

  • Toughness to resist fracture
  • hot hardness to resist temperature failure
  • wear resistance to prolong life of tool

7

What are the principal alloying ingredients in high-speed steel

  • Tungsten-type
  • Molybdenum-type

8

What is the difference in ingredients between steel cutting grades and nonsteel cutting grades of cemented carbide

Non-cutting grades contain only WC and Co

 

Steel cutting grades contain TiC and/or TaC in addition to WC-Co

9

Identify some of the common compounds that form the thin coatings on the surface of coated carbide inserts

titanium

carbide

titanium nitride

aluminum oxide

10

Name the seven elements of tool geometry for a single-point cutting tool

back rake angle

side rake angle

end relief angle

side relief angle

side cutting edge angle

nose radius

end cutting angle

11

Name the 2 main categories of cutting fluid according to function

lubricants

coolants

12

Name the 4 categories of cutting fluid according to chemistry

cutting oils

emulsfied oil

chemical fluids

semichemical fluids

13

What are the methods by which cutting fluids are applied in a machining operation

flooding

 

mist appliction

 

manual application

14

What are the problems associated with the use of cutting fluids

  • Can be contaminated with foreign substances
  • odors and health issues
  • Does not perform lubrication function due to contaminants
  • Disposal of old fluids have become more costly

15

What are some of the probelms introduced by dry machining

  • overheating
  • operating at lower cutting speeds and production rates in order to prolong tool life
  • absence of chip removal benefits in grinding and milling

16

Define machinability

Relative ease with which material can be machined using appropriate tooling and cutting conditions

17

What are the criteria by which machinability is commonly assessed in a production machining operation

  • Tool Life
  • Cutting force
  • power
  • surface finish
  • ease of chip disposal

18

What are factors on which he selection of feed in a machining operation should be based

  • tooling
  • roughing or finishing
  • constraints on feed in roughing
  • surface finishing requirements in finishing

19

The unit cost in a machining operations is the sum of 4 cost terms. What are those terms

  • cost of part handling
  • cost of machining tim
  • cost of tool change time
  • tooling cost

20

Which cutting speed is always lower for a given machining operation, cutting speed for minimum cost, or cutting speed for maximum production rate? Why?

CUTTING SPEED FOR MINIMUM COST

21

Identify alternative ways in which cutting tool is held in place during machining

  • Solid shank
  • brazed inserts
  • mechanically clamped inserts