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Cutting Data Table Meaning of Numbers "Speed of Rotation" and "Speed of Movement"
When machining by machine, it is necessary to set specific figures.
In the case of rotary tools such as drills, Tap , and end mills, the numbers "speed of rotation" and "speed of movement" are required, and the numbers in the cutting condition table in the catalog represent them.
You can see what the value of that number is by looking at the units. If you don't know the numbers in the catalog condition table, check the units.
There are two ways to express the speed of rotation and the speed of movement.
Speed of rotation
The rotational speed (min-1) and the cutting speed (m/min) are mutually convertible.
(1) Rotation speed (min-1) * size with Maihun.
It is a number that says "how many revolutions do you make in one minute?" In symbols, it is expressed as n. It is also sometimes expressed as rpm.
Spindle rotation speed (n) [min-1 ] = Vc × 1000 ÷ dc ÷ π
(2) Cutting speed (m/min) *Meters per minute
It is a number that says, "How many meters does the cutting edge of a tool run in one minute?" In the symbol, it is expressed as Vc.
Cutting Speed (Vc)[m/min] = π × Dc × n ÷ 1000
Speed of movement
The feed rate (mm/min) and the feed rate per revolution (mm/rev) are mutually convertible.
(1) Feeding speed (mm/min) * Milliper Minute size .
It is a number that says "how many millimeters of the tool moves in one minute". In symbols, it is expressed as Vf.
Feed speed (Vf) [mm/min] = Feed amount per revolution (mm/rev) × n
(2) Feed amount per revolution (mm/rev) * size milliper revolution.
How many millimeters does the tool move with each revolution?"
The feed rate per revolution is the feed amount per blade (fz) multiplied by the number of flutes of the tool.
Feed per revolution (mm/rev) = Feed per blade (fz) × z ( number of flutes )
Feed per blade (fz) [mm/t] = Vf ÷ n ÷ z
- List of calculation formulas for cutting data
Basic Calculation Formula
Cutting Speed (Vc)[m/min] = π × Dc × n ÷ 1000
Spindle rotation speed (n) [min-1 ] = Vc × 1000 ÷ dc ÷ π
Feed speed (Vf) [mm/min] = fz × z × n
Feed per blade (fz) [mm/t] = Vf ÷ n ÷ z
unit
π (pi) = pi (3.14)
DC = Cutter diameter (mm)
z = number of flutes
Spindle capability diagram
If you use a large cutter diameter, check whether you are using a place where the spindle speed of the machine is easy to produce torque.
(FAQID:8543)