Ch21 cutting tool cutting fluids Erdi Karaçal Mechanical Engineer University of Gaziantep

Chapter 21
Cutting-Tool Materials and Cutting
Fluids
Manufacturing, Engineering & Technology, Fifth Edition, by Serope Kalpakjian and Steven R. Schmid.
ISBN 0-13-148965-8. © 2006 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved.

Hardness of Cutting
Tool Materials as a
Function of
Temperature
Figure 22.1 The hardness of
various cutting-tool materials as a
function of temperature (hot
hardness). The wide range in
each group of materials is due to
the variety of tool compositions
and treatments available for that
group.

General Properties of Tool Materials

General Characteristics of Cutting-Tool Materials

Operating Characteristics of Cutting-Tool Materials

Inserts and Toolholders
Figure 22.2 Typical carbide inserts with various shapes and
chip-breaker features: Round inserts are also available, as
can be seen in Figs. 22.3c and 22.4. The holes in the inserts
are standardized for interchangeability in toolholders.
Source: Courtesy of Kyocera Engineered Ceramics, Inc.
Figure 22.3 Methods of mounting
inserts on toolholders: (a) clamping
and (b) wing lockpins. (c) Examples of
inserts mounted with threadless
lockpins, which are secured with side
screws. Source: Courtesy of Valenite.

Insert Edge Properties
Figure 22.4 Relative edge strength and
tendency for chipping of inserts with various
shapes. Strength refers to the cutting edge
indicated by the included angles. Source:
Courtesy of Kennametal, Inc.
Figure 22.5 Edge preparation for
inserts to improve edge strength.
Source: Courtesy of Kennametal, Inc.

ISO Classification of Carbide Cutting Tools

Classification of Tungsten Carbides According to
Machining Applications

Relative Time Required to Machine with Various Cutting-Tool
Materials
Figure 22.6 Relative time required to machine with various cutting-tool materials,
indicating the year the tool materials were first introduced. Note that machining time has
been reduced by two orders of magnitude with a hundred years. Source: Courtesy of
Sandvik.

Typical Wear Patterns on High-Speed-Steel
Uncoated and Titanium-Nitride Coated Tools
Figure 22.7 Schematic illustration of typical wear patterns of
high-speed-steel uncoated and titanium-nitride coated tools.
Note that flank wear is significantly lower for the coated tool.

Multiphase Coatings on a Tungsten-Carbide Substrate
Figure 22.8 Multiphase coatings on a tungsten-carbide substrate. Three
alternating layers of aluminum oxide are separated by very thin layers of
titanium nitride. Inserts with as many as thirteen layers of coatings have
been made. Coating thicknesses are typically in the range of 2 to 10 μm.
Source: Courtesy of Kennametal, Inc.

Ranges of Mechanical Properties for Groups of Tool
Materials
Figure 22.9 Ranges of mechanical properties for various groups of
tool materials. See also Tables 22.1 through 22.5.

Cubic Boron Nitride Inserts
Figure 22.10 An insert of
polycrystalline cubic boron nitride or a
diamond layer on tungsten carbide.
Figure 22.11 Inserts with
polycrystalline cubic boron nitride tips
(top row), and solid-polycrystalline
cBN inserts (bottom row). Source:
Courtesy of Valenite.

Proper Methods of Applying Cutting Fluids
Figure 22.12 Schematic illustration of the proper methods of
applying cutting fluids (flooding) in various machining operations:
(a) turning, (b) milling, (c) thread grinding, and (d) drilling.

Ch21 cutting tool cutting fluids Erdi Karaçal Mechanical Engineer University of Gaziantep

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Ch21 cutting tool cutting fluids Erdi Karaçal Mechanical Engineer University of Gaziantep