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Flashcards in Carbide tooling Deck (20)
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0

What are the 4 basic cemented carbide combinations?

Tungsten carbide
Titanium Carbide
Tantalum Carbide
Cobalt

1

What is the basic carbide mixture?

94 parts tungsten carbide
6 parts Co

2

How are cemented carbides made?

Made by compressing metal powders and sintering the resulting shape

3

What is sintering?

The process of compacting and forming a solid mass of material by heat and/or pressure without melting it to the point of liquidation.

4

What does cobalt do in a sintering process?

Acts as a binder and increases tool toughness while reducing wear resistanc

5

True or false: carbide tool's weak point is their relatively weak compressive strength

False. Carbide tools have good compressive strength

6

What benefits does a titanium nitride coating give to a carbide cutter?

Acts as a lubricant, reducing friction which in turn, reduces chattering.

7

What is the benefit of a titanium carbide coating on a carbide cutter?

Titanium carbide coating increases wear resistance.

8

What is the benefit of aluminum oxide coatings for carbide tooling?

Aluminum oxide coatings help resist chemical reactions

9

What kind of grinding wheels are used to grind carbide tooling?

Silicon carbide and diamond grit grinding wheels are used to grinding carbide tooling.

10

A chip splitter on a cutting edge can give what benefits when taking a cut?

A chip splitter reduces cutting forces, gives smother cutting action, and promotes longer tool life.

11

What would help reduce the chance of cratering when cutting with an insert?

Coating the insert could help

12

What are the three basic rake angles?

Positive
Neutral
Negative

13

What is the first letter mean in the carbide insert identification system?

Shape

C - 80 deg. Diamond
D - 55 deg. Diamond
S - square
T - triangle
V - 35 deg. Diamond

14

What does the second letter of the carbide insert identification system mean?

Rake angle clearance

N - negative clearance angle
P - positive clearance angle

15

What does the third letter mean in the carbide identification system mean?

Tolerance

16

What does the fourth letter mean in the carbide identification system mean?

Groove/hole

17

What does the first number mean in the carbide insert identification system mean?

Internal circle size

18

What does the second number mean in the carbide identification system mean?

Insert thickness

19

What does the third number mean in the carbide identification system mean?

Insert radius or flat