MANUFACTURING – CNC MACHINING CALCULATOR
Cutting Force Milling
A precise tool.
What is the Cutting Force Milling & How does it work?
In milling operations the material is removed by a rotating cutter that creates a continuous chip. The force required to shear this chip, called the cutting force, is a key parameter for tool life, machine power and surface quality. It depends on the material’s resistance to deformation (specific cutting force), the geometry of the cut and the thickness of the chip that is formed each time a tooth engages the workpiece. The chip thickness, often approximated by the feed per tooth for end‑mills, directly scales the amount of material that must be sheared in each tooth pass. Larger chip thicknesses increase the shear area and therefore raise the cutting force. The axial depth of cut (ap) and the radial width of cut (ae) define the size of the cutting zone in the vertical and horizontal directions, respectively, and also multiply the force. A widely used empirical relationship for the main cutting force in milling is expressed as the product of the specific cutting force (Kc) and the three geometric terms: chip thickness (t), axial depth of cut (ap) and radial width of cut (ae). This simple model provides a quick estimate for process planning and power budgeting.
F_c = K_c cdot t cdot a_p cdot a_e
K_c = specific cutting force (N/mm²), t = chip thickness (mm), a_p = axial depth of cut (mm), a_e = radial width of cut (mm)
Parameters
Result
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Frequently Asked Questions
What is cutting force in milling?
Cutting force is the force required to shear the chip of material removed during milling. It affects tool life, machine power, and surface quality.
How does chip thickness affect cutting force?
Chip thickness influences cutting force because it determines the amount of material being sheared at once. Thicker chips generally require more force to shear.
What factors determine specific cutting force?
Specific cutting force is determined by the material’s resistance to deformation, which depends on factors like hardness and ductility.
How does cutter geometry impact cutting force?
Cutter geometry affects cutting force by influencing how efficiently the chip is formed and sheared. Different geometries can lead to varying forces depending on the application.
What is feed per tooth in milling?
Feed per tooth refers to the distance each tooth of the cutter advances into the workpiece during one revolution, which approximates chip thickness for end-mills.
Why is cutting force important in manufacturing?
Cutting force is crucial because it affects tool wear, machine performance, and the quality of the finished part. Proper management ensures efficient operations and high-quality results.
Results are for informational purposes only and do not constitute professional advice.