Tool life | Taylor's tool life equation | factors affecting tool life | GATE | PT | MP

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In this video discussion on tool life, various factors affecting tool life, effect of feed, speed and depth of cut on tool life, etc
n Taylor tool life equation as (V Tn =c)
V= velocity of the cutting tool (m/min),
T= tool life(min)
c, n,, taylors coeffiecients

Tool wear is the gradual failure of cutting tools due to regular operation. Tools affected include tipped tools, tool bits, and drill bits that are used with machine tools.


Types of wear include:

flank wear in which the portion of the tool in contact with the finished part erodes. Can be described using the Tool Life Expectancy equation.

crater wear in which contact with chips erodes the rake face. This is somewhat normal for tool wear, and does not seriously degrade the use of a tool until it becomes serious enough to cause a cutting edge failure. Can be caused by spindle speed that is too low or a feed rate that is too high. In orthogonal cutting this typically occurs where the tool temperature is highest. Crater wear occurs approximately at a height equaling the cutting depth of the material. Crater wear depth (t0) = cutting depth

built-up edge in which material being machined builds up on the cutting edge. Some materials (notably aluminum and copper) have a tendency to anneal themselves to the cutting edge of a tool. It occurs most frequently on softer metals, with a lower melting point. It can be prevented by increasing cutting speeds and using lubricant. When drilling it can be noticed as alternating dark and shiny rings.

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Other Important Links: Basic Metal Cutting Process.
Types of Work Holding Devices | T- Bolt | V - Block Clamping
Cutting Tool materials | Properties | Cutting Tool | Selection of cutting Tool
Types of Tool Wear | Crater Wear | Flank Wear | Factor affecting Tool Wear | Crater Vs Flank Wear
Single Point Cutting Tool |Tool Signature| Nomenclature
Grinding wheel Standard Marking System
ORTHOGONAL TURNING | CUTTING FORCE | SHEAR FORCE | C-40 STEEL
ORTHOGONAL TURNING | CUTTING FORCE | SHEAR FORCE | C-40 STEEL

TAYLOR'S TOOL LIFE EQUATION | TOOL LIFE | EFFECT ON TOOL LIFE
TURNING OPERATION| POWER CONSUMPTION | SPECIFIC CUTTING ENERGY| GATE

ORTHOGONAL CUTTING | OBLIQUE CUTTING | BASIC METAL CUTTING
TYPES OF CHIPS IN METAL CUTTING | CONTINUOUS AND DISCONTINUOUS CHIPS
Full Theory of Chip thickness Ratio in Metal Cutting| Production Technology | Manufacturing process
HOW A CHIP BREAKERS WORK |TYPES OF CHIP BREAKERS | CHIP BREAKERS IN METAL CUTTING |
Lathe machine operation Facing, Turning, Grooving, chamfering, parting off, Drilling and knurling
TYPES OF CAST IRON | PROPERTIES OF CAST IRON | GREY CAST IRON | WHITE CAST IRONS |DUCTILE CAST IRON
METALS | ALLOYS | TYPES OF METALS ALLOY | STEEL | CAST IRONS | CLASSIFICATION OF METAL ALLOYS
ALLOYS | HOMOGENEOUS MIXTURE | PROPERTIES OF ALLOYS| USES OF ALLOYS | SCIENCE
TYPES OF WELDING | ARC WELDING | GAS WELDING | RESISTANCE WELDING | GATE | IIT

Jigs and Fixture |Difference between Jigs and Fixtures| Work Holding Devices | Jigs | Fixtures |
TAPER ANGLE | HOW TO FIND TAPER ANGLE | GATE | METAL CUTTING

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[ajittraders]

in practical life what is the real speed we usually get ?
and how do we come to know that tool life is over ?

[saeedsaeed-ltxm]

Sir your explanation was great how we can get the constants??

[ope]

Sir explain the reasons that the same tool life may be obtained at two different cutting speed