CNC milling is a type of computer numerical control machining process. It utilizes pre-programmed commands to control the cutting motion of the milling machine's cutting tool on the workpiece, removing material to obtain the desired part shape and size. In CNC milling, the milling machine's table can be moved in multiple directions (typically X, Y, and Z axes) and the tool can also be rotated. Through the relative movement of the two, the workpiece is milled. For example, to machine mechanical parts with complex grooves and bosses, CNC milling can be programmed to precisely cut at different positions on the workpiece, removing excess material to create parts that meet the design requirements.

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What is the History of CNC Milling?
The origin of milling technology: the earliest manual milling
The origins of milling can be traced back to ancient times. Early milling was done by hand. Craftsmen use simple tools, such as hand-held cutting tools that resemble the shape of modern milling cutters, to make cuts on the surface of the workpiece. These tools are usually made of stone, bronze, or iron. In ancient Egypt, for example, craftsmen had begun to use rough milling tools to process wood and some soft metals, which were used to make furniture, architectural decorative components, and simple weapons. At that time, processing was very slow and had limited precision, relying mainly on the experience and skills of craftsmen. This method of manual milling lasted for a long time, and it was not until the advent of mechanical power that it began to change significantly.

The industrial revolution that drives milling technology
The Industrial Revolution was a key turning point in the development of milling technology. With the invention and application of power sources such as steam engines, mechanical processing equipment has stable and powerful power. In 1818, American engineer Eli Whitney built the first milling machine. The advent of this milling machine marked the transition of milling from hand work to machining. During the Industrial Revolution, the design and functionality of milling machines continued to improve. It began to employ more sophisticated transmission mechanisms, such as gears and lead screws, which made the movement between the tool and the workpiece more precise. The table of the milling machine can achieve more complex movements, such as longitudinal, transverse, and vertical feeds, which makes it possible to machine parts of various shapes, such as planes, grooves, and gears. Moreover, with the development of the steel industry, the structure of the milling machine is more durable and durable, which can withstand greater cutting force, and the processing efficiency is greatly improved.