|
|
|
|
| |
Taylor'ın Takım Ömrü Teorisi / Taylor's Tool Life Theory |
|
| |
TAYLOR'IN TAKIM ÖMRÜ TEORİSİ
TAYLOR'S TOOL LIFE THEORY
A number of variables including feed rate, depth of cut, cutting speed, coolant, tool material and workpiece material affect tool life.
F.W. Taylor, an American engineer, developed a standardised test to determine the relationship between the surface speed (relative to the tool) of the workpiece material (cutting speed) and the time the tool remains useful.
Taylor’s test examined two of the variables – cutting speed and the time in cut. The test was repeated for different combinations of tool and workpiece material. He decided to measure flank wear of the tool under test, as this is consistent and easy to measure. It was found that a practical amount of wear to measure before breakage was 0.75mm for solid and brazed tips or 1.25mm for ceramic tools.
Many tests were carried out to determine the time taken to reach this amount of wear at different cutting speeds, the results were plotted on a graph showing that a logarithmic relationship existed between cutting speed and cutting time.
TAYLOR’S EQUATION. (VTn = C)
The relationship established, VTn = C, is known as Taylor’s Tool Life Equation where
V = Cutting Speed,
T = Time in cut (in minutes),
n = the index for the particular combination of tool and workpiece material and
C = the constant for the particular set up.
The value of n can, in most cases, be found in suitable machining handbooks in table form.
|
|
|
|
|
|
| |
Bugün 44 ziyaretçi (53 klik) kişi burdaydı! |
|
|
|
|
|
|
|
