Guide to Machining Parameters Selection in Milling Workflow
Machining parameters for milling procedures will certainly affect the efficiency and quality directly, so it’s essential for the optimization of CNC milling parameters, the meaning of each parameter, selection concept and also advised values are provided in this post for your referral.
What are CNC Milling Parameters
The optimization of milling procedure parameters is carefully pertaining to the CNC milling precision, the improvement of the surface quality and also efficiency. Milling parameters generally include:
- Milling spindle speed (V): the linear speed of a particular factor on the cutting edge in the main movement throughout milling.
V= π * dn/1000 (d: milling cutter diameter, mm; n: spindle or cutter rotating speed, r/min).
- Feed rate (F): the systematic variation of the milling cutter about the workpiece in the feed direction. The feed price of CNC milling will certainly influence the machining precision, surface area high quality, deformation of the work surface, as well as cutting tool life.
Feed per revolution (f): the displacement of the milling cutter in the feed direction relative to the workpiece per revolution.
Feed per tooth (fz): the displacement of each tooth in the feed instructions about the work surface in each turning of the milling cutter.
Feed per min (Vf): the displacement of the milling cutter in the feed instructions about the work surface per minute of rotation.
Vf = fn =fz * z * n (n: grating rate; z: number of milling teeth).
- Milling cutting size (W): the dimension of the milling layer measured perpendicular to the axis of the milling cutter and also the feed instructions of the work surface.
- Milling cutting deepness (D): the dimension of the milling layer determined in the instructions alongside the axis of the milling cutter.
Machining Parameters Choice
Note: The selection concept of machining parameters for grating operation is to offer full play to the functioning performance and cutting efficiency of the device on the property of ensuring the machining quality. Under the problem that the strength of the procedure system permits, choose bigger milling deepness and also size as high as possible, then choose bigger feed per tooth, as well as lastly calculate the milling speed.
The optimization/selection of milling width and also depth
For endmills, the end mill diameter is typically 1.1 to 1.6 times the milling size. For round milling cutters, the milling deepness shall be less than the length of the milling cutter.
The optimization/selection of feed
Feed rate per tooth is an essential index to measure grating effectiveness. In harsh milling, the feed rate is primarily influenced by the cutting force, while in semi-finishing milling and also finishing milling, it is mainly restricted by the surface roughness.
The optimization/selection of spindle speed
The speed will certainly be affected by workpiece material, milling part hardness, cutter material, and extra elements.