CNC milling relies on computerized digital control. Any machining process can be done on the milling machine, including the process of making round parts.
The motion axes of the CNC milling machine are based on an XYZ coordinate measuring system. Complex CNC milling machines can have 5 or more independent motion axes to create more complex shapes.

What Is CNC Milling?

1.The Basics Of CNC Mills
CNC mills are automated cutting machines using a rotating spindle-head to cut away unwanted material. CNC milling machines come in a variety of sizes and different axis configurations. They are mainly utilized to cut harder metals but can work with workpiece materials ranging from plastic and aluminum to stainless steel and titanium.

2.How CNC Milling Works  
CNC mills excel at profile cutting harder materials. Like all CNC machines, a CNC mill is controlled with G-Code created through CAM software. The Gg-Code instructs the machine where to move the tool head, how fast to spin the tool, how deep to cut, how to move the workpiece, and other factors relating to speed, feed rate, and coordination. The G-Code complexity depends on how many axes the milling machine has.
Mills can still be used for profile cutting of softer materials, but are not as cost-effective for that use as CNC routers. The main difference between these machines is that with a CNC router the workpiece remains stationary while the router cutting head is directed around the piece, while a CNC mill may move both tool head and workpiece. CNC mills are mainly used in industrial manufacturing, while CNC routing is more common for lower output manufacturing like woodworking.

CNC Milling Processes

3-axis CNC milling
The most widely used type of CNC milling machine. The full use of the X, Y, and Z directions makes a 3 Axis CNC mill useful for a wide variety of wide wide variety of work.

4-Axis CNC machining
This type of router allows the machine to rotate on a vertical axis, moving the workpiece to introduce more continuous machining.

5-Axis CNC machining
These machines have three traditional axes as well as two additional rotary axes. A 5-axis CNC router is, therefore, able to machine 5 sides of a workpiece at in one machine without having to remove the workpiece and reset.

Available Materials for CNC Milling Parts

•  Metal Materials
CNC milling equipment mainly includes CNC milling machines and machining centers, which can perform flat profile milling and curved profile milling on parts, as well as drilling, expanding, twisting, boring, trance machining and thread machining, etc.

•  Plastic Materials
When milling thermoplastic, the cutting speed can’t be less than 300m/min. The surface roughness value decreases with the feed, which has nothing to do with the depth of cut. In addition, the sharper the cutting edge is, the better the milling effect will be. In production, it is recommended to use side milling method to avoid work-piece burns.

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