What is CNC Machining?
CNC machining refers to processing carried out with numerical control machining tools. CNC numerical control machine tools are programmed and controlled by numerical control processing languages, usually G-code. The G-code language for CNC machining tells the CNC machine tool which Cartesian position coordinates to use for the machining tool, and controls the feed rate and spindle speed of the tool, as well as functions such as tool converter and coolant. CNC machining has significant advantages over manual machining. For instance, the parts produced by CNC machining are highly precise and repeatable. CNC machining can produce parts with complex shapes that cannot be completed by manual processing.
How does CNC work?
The working principle of CNC machining
The working principle of CNC machining can be summarized into the following steps:
Design the three-dimensional model of the parts:
Engineers first use computer-aided design (CAD) software to create a three-dimensional model of the part. This model contains all the geometric shapes and dimensional information of the parts.
●Write numerical control programs:
Then, the design model is converted into numerical control code (such as G-code) through Computer-aided manufacturing (CAM) software. These codes contain detailed information such as processing paths and cutting parameters, which are used to guide the machine tool in processing.
●Transmit numerical control programs:
The written numerical control program is transmitted to the control system of the CNC machine tool through data transmission interfaces (such as USB, Ethernet, etc.).
●The machine tool reads and interprets the code:
The control system of a CNC machine tool reads and interprets these numerical control codes, generates control signals, and drives various moving parts of the machine tool (such as the spindle, worktable, etc.).
●Machine tool processing:
Under the control of the numerical control system, the moving parts of the machine tool move along the predetermined trajectory to complete operations such as cutting, drilling and milling of the workpiece. During the processing, the CNC system will monitor parameters such as the position of the tool and workpiece, cutting force, etc. in real time, and make adjustments when necessary to ensure processing accuracy and quality.
● Complete processing and inspection:
After the processing is completed, the CNC machine tool will automatically stop moving and may be equipped with an online measurement and feedback system to conduct real-time inspection and correction of the processed parts to ensure they meet the design requirements.
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