After the workpiece is aligned and the program debugging is completed, it can enter the automatic machining stage. In the automatic machining process, the operator should monitor the cutting process to prevent abnormal cutting from causing quality problems and other accidents of the workpiece.

Monitoring the cutting process mainly considers the following aspects:

    1.The monitoring of the machining process mainly considers the rapid removal of excess allowance on the surface of the workpiece during rough machining. In the automatic machining process of machine tools, the tool automatically cuts according to the predetermined cutting trajectory based on the set cutting amount. At this point, the operator should pay attention to observing the changes in cutting load during the automatic machining process through the cutting load table, adjust the cutting amount based on the tool's load-bearing condition, and maximize the efficiency of the machine tool.

    2. Monitoring of cutting sound during the cutting process. In automatic cutting, the sound of the tool cutting the workpiece is generally stable, continuous, and light at the beginning of cutting, and the movement of the machine tool is stable. As the cutting process progresses, when there are hard spots on the workpiece, tool wear, or tool clamping, the cutting process becomes unstable. The manifestation of instability is a change in cutting sound, and there will be collision sounds between the tool and the workpiece, causing vibration in the machine tool. At this time, the cutting amount and cutting conditions should be adjusted in a timely manner. When the adjustment effect is not obvious, the machine tool should be paused and the condition of the cutting tools and workpiece should be checked.

    3. Precision machining process monitoring is mainly to ensure the machining size and surface quality of the workpiece, with high cutting speed and large feed rate. At this point, special attention should be paid to the impact of chip accumulation on the machining surface. For cavity machining, attention should also be paid to over cutting and cutting at the corners.

To solve the above problems, firstly, attention should be paid to adjusting the spray position of the cutting fluid to keep the machining surface in cooling conditions at all times; The second is to pay attention to the quality of the processed surface of the workpiece, and adjust the cutting amount to avoid changes in quality as much as possible. If the adjustment still has no significant effect, the machine should be shut down to check whether the original program is reasonable. Special attention should be paid to the position of the tool when pausing or stopping the inspection. If the cutting tool stops during the cutting process and the spindle suddenly stops rotating, it will cause tool marks on the surface of the workpiece. Generally, the machine should be considered for shutdown when the tool leaves the cutting state.

    4. The quality of tool monitoring largely determines the machining quality of the workpiece. In the automatic machining cutting process, it is necessary to determine the normal wear and abnormal damage of the tool through methods such as sound monitoring, cutting time control, pause inspection during the cutting process, and workpiece surface analysis. According to processing requirements, timely handling of cutting tools is necessary to prevent processing quality problems caused by untimely handling of cutting tools.