2.1.1 Overview of the principle of operation
CNC machining, or computer numerical control machining, is an automated machining method that uses digital information to define the part machining process and control the machine tool for automatic operation. Its working principle is: first, through the input device (such as human-machine interface) to read the pre-programmed CNC machining program, the CNC system calls the decoding module, the program will be converted into the system can read and understand the data format. Then, through the interpolation operation, the control instructions to be sent in each cycle are calculated and assigned to the drive circuit of each axis of motion, which is converted and amplified to drive the motor and drive the motion of each axis. Subsequently, the feedback device is used to detect the execution state, accordingly completing the closed-loop control, so that the coordinate axes, spindles and auxiliary movements are coordinated to realize the relative motion of the tool and the workpiece, and then automatically process all the contours of the parts. In the processing of aluminum alloy non-standard parts, the same process is followed, through accurate command control, to achieve high-precision machining of aluminum alloy materials.
2.1.2 Advantages of Aluminum Alloy Machining
CNC machining has significant advantages when machining aluminum alloy non-standard parts. On the one hand, the high precision, which can be accurate to a few microns or even smaller dimensions, ensures the consistency of the machining quality of aluminum alloy non-standard parts. For example, in the aerospace industry, CNC machining can meet the very high precision requirements for aluminum alloy parts. On the other hand, good repeatability, through the automatic control of computer programs, the results of each machining can be highly consistent, greatly improving production efficiency and product quality. In addition, CNC machining also has the characteristic of high flexibility, which can be quickly adjusted and modified according to the demand, just by modifying the computer program, without the need to re-make the molds, which is very suitable for the personalized customization demand of aluminum alloy non-standard parts.