Each tool will adopt different processing parameters for different materials processed. In the field of milling, tool manufacturers aim to improve processing efficiency by optimizing tool materials and developing more targeted coating technologies.
Through the combination of various elements in materials, we can see thousands of raw materials that can be processed. To process these materials, we must know the processing properties of this material and the method that should be optimized for processing.
The material group to which the workpiece belongs
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According to the ISO 531:1966 international standard, a total of processable materials are divided into 6 categories, which are:
The steel material represented by P;
Stainless steel material represented by M;
The cast iron material represented by K;
Non-metallic material represented by N;
High-temperature materials represented by S;
High hardness material represented by H;
Within these broad categories, tool manufacturers classify materials into smaller categories based on their tensile strength and hardness. If we cannot find the processing performance parameters of the material to be processed in these subcategories, the most feasible way is to consult the tool supplier, I believe they will be happy to help you solve this problem.
Calculation formula
We usually see the following formula in tool manuals
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Before talking about this formula, let's recall what we have learned about the formula for the circumference of a circle:
C (circumference)=π (pi)*d (diameter)
According to this formula, we can conclude that for each revolution of a tool with diameter D, the distance traveled by the outermost point of the tool is:
π*D
Then, when the tool rotates at a frequency of n revolutions/1 minute, the distance traveled is:
n*π*D
According to the formula of time (T) × speed (V) = distance (S), the speed Vc of the outermost point of the tool at any point in this period of time is:
Vc=(n*π*D)/1
Through conversion, the following formula is obtained:
n=Vc/(π *D)
Notice! Our tool uses millimeters (mm) as the unit, so the unit of speed Vc in the previous formula is: mm/minute
After length conversion (1m=1000mm), we have this common formula:
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After simplifying the equation, we have our final version of the formula:
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Notice!
Here the unit of D (tool diameter) is still mm (millimeters), and the unit of Vc (linear speed) has changed to: M/min (meters/minute)
This formula also applies to turning. In turning, D here represents the diameter of the blank.
