CNC machining (computer numerical control machining) is a method of machining using computer-controlled CNC machine tools, which is widely  manufacturing in various industries.

 It controls the machine tool to cut along the specified path through a pre-written machining program, thereby realizing machining of the workpiece. The following will introduce the 

process flow of CNC machining.

Firstly, design and formulate the machining process

Before CNC machining, it is necessary to design the product and formulate the machining process. Designers use CAD (computer-aided design) software to 

design the product according to the requirements and functions of the product. Then, the process engineer formulates the machining process according to 

the shape, material and machining requirements of the product, including selecting appropriate cutting tools, cutting parameters, cutting paths, etc.

Secondly, write the machining program

The machining program is the core of CNC machining. It contains the machine tool's motion instructions, cutting parameters, cutting paths and other 

information. Writing the machining program requires the use of CAM (computer-aided manufacturing) software to convert the product design file into a 

machining program. When writing the machining program, factors such as the cutting performance of the material and the rationality of the process need to 

be considered to ensure the efficiency and quality of the machining process.

Thirdly, perform machine clamping and tool clamping

Before CNC machining, the workpiece needs to be clamped on the machine tool and the appropriate tool needs to be selected for cutting. 

Machine clampiis the process of fixing the workpiece on the machine tool, which needs to consider the shape, size and machining requirements of the workpiece. 

Tool clamping

 is the process of installing the tool on the machine tool, which requires the selection of the appropriate tool type and specification, as well as the correct 

installation method. The accuracy and stability of machine clamping and tool clamping have an important impact on machining accuracy and efficiency, 

so they need to be carefully adjusted and checked.

Finally, perform machining operations

After the machine clamping and tool clamping are completed, CNC machining operations can be started. The operator inputs the written machining program 

into the CNC machine tool controller, and then through the controller's instructions, the machine tool cuts according to the path and speed specified by the

 program. During the machining process, the operator needs to monitor the machining status and adjust the cutting parameters and tools in time to ensure 

machining quality and efficiency.

Finally, perform machining inspection and finishing After completing CNC machining, the machined parts need to be inspected and trimmed. Inspection can

 be carried out by measuring tools and equipment to detect the size, shape and surface roughness to verify whether the machined parts meet the requirements. 

Dressing is to perform processes such as dressing, grinding or polishing on the machined parts to eliminate possible processing defects and improve the 

accuracy and surface quality of the machined parts.

In summary, the CNC machining process covers the design and formulation of machining processes, writing machining programs, machine tool clamping and 

tool clamping, machining operations, and machining inspection and dressing. Each link requires accurate operation and strict control to ensure the efficiency

 of the machining process and the quality of the machined parts. The development of CNC machining provides high-precision and high-efficiency parts 

manufacturing solutions for various industries. Compared with traditional manual operation and conventional machining, CNC machining has the following 

Advantages:

1. High-precision CNC machining can achieve high-precision parts machining through the precise control of CNC machine tools and the high-speed rotation 

of tools. The machining accuracy can reach sub-millimeter or even higher levels to meet the requirements of complex parts.

2. High-efficiency CNC machining uses computer programming and automatic control to achieve automatic continuous processing, greatly improving production

 efficiency. It reduces the time and workload of manual operation and improves production efficiency and capacity.

3. Flexibility CNC machining can be flexibly processed according to different product needs and design requirements. Only by modifying the processing program

 and adjusting the tool, the processing of different parts can be realized, avoiding the trouble of changing equipment in traditional mechanical processing.

4. Repeatability CNC machining can achieve precise cutting paths and processing parameters by writing processing programs and automatic control, ensuring

 the consistency and repeatability of processing. It is not affected by the operator's technical level and experience, reducing the impact of human factors on 

processing quality.

5. Versatility CNC machining can realize a variety of processing operations, such as milling, turning, drilling, tapping, etc. A CNC machine tool can complete 

a variety of processing tasks, reducing equipment investment and floor space.