The CNC machining process also follows the cutting rules of mechanical processing, which is generally the same as the machining process of ordinary machine tools. Due to its application of computer control technology in automated machining, it has the characteristics of high machining efficiency and high precision. The machining process has its unique features, with complex procedures and detailed and meticulous step arrangements.
The CNC machining process includes the selection of cutting tools, determination of cutting parameters, and design of cutting process routes. The CNC machining process is the foundation and core of CNC programming. Only with a reasonable process can high-efficiency and high-quality CNC programs be developed. The standards for measuring the quality of a CNC program are: the minimum machining time, the minimum tool loss, and the best result of machining the workpiece.
The CNC machining process is a part of the overall machining process of the workpiece, and even a single process. It needs to coordinate with other preceding and succeeding processes in order to ultimately meet the assembly requirements of the overall machine or mold, and thus produce qualified parts.
The CNC machining process is generally divided into rough machining, medium rough corner cleaning machining, semi precision machining, and precision machining steps. The steps for CNC machining of parts are as follows:
1. Analyze the part drawing to understand the general condition of the workpiece (geometric shape, workpiece material, process requirements, etc.)
2. Determine the CNC machining process for the parts (machining content, machining route)
3. Perform necessary numerical calculations (coordinate calculation of base points and nodes)
4. Write a program sheet (different machine tools may vary, follow the user manual)
5. Program verification (inputting the program into the machine tool and performing graphic simulation to verify the correctness of the programming)
6. Processing workpieces (good process control can save time and improve processing quality)
7. Workpiece acceptance and quality error analysis (inspect the workpiece, pass it to the next process. If it is not qualified, identify the cause of the error and correct it through quality analysis).
a. Adaptive control technology for processing;
b. Intelligent optimization and selection of processing parameters;
c. Intelligent fault self diagnosis and self repair technology;
d. Intelligent fault replay and fault simulation technology;
e. Intelligent communication servo drive device;
f. Intelligent 4M CNC system: Integrating measurement, modeling, machining, and machine operation (i.e. 4M) into one system during the manufacturing process.
8. System openness
a. Open to future technologies: As software and hardware interfaces follow recognized standard protocols, they can adopt, absorb, and be compatible with the new generation of general-purpose software and hardware.
b. Open to users with special requirements: updating products, expanding features, and providing various combinations of hardware and software products to meet special application requirements;
c. The establishment of numerical control standards: standardized programming languages that are convenient for users to use and reduce labor consumption directly related to operational efficiency.
9. Drive parallelization
Parallel machine tools can achieve multiple functions such as multi coordinate linkage CNC machining, assembly, and measurement, and can better meet the processing of complex special parts. Parallel machine tools are considered the "most meaningful progress in the machine tool industry since the invention of CNC technology" and the "21st century new algebraic control machining equipment".
10. Extremization (enlargement and miniaturization)
