How to Monitor and Adjust During CNC Processing?

After the workpiece is aligned and the program debugging is completed, it can enter the automatic processing stage.  In the automatic machining process, the operator must monitor the cutting process to prevent workpiece quality problems and other accidents caused by abnormal cutting. 

Monitoring the cutting process mainly considers the following aspects:

1. Monitoring of the machining process the main consideration for rough machining is the rapid removal of the excess allowance on the surface of the workpiece. In the automatic machining process of the machine tool, according to the set cutting amount, the tool automatically cuts according to the predetermined cutting path. At this time, the operator should pay attention to observe the change of the cutting load during the automatic machining process through the cutting load table, and adjust the cutting amount according to the bearing capacity of the tool to maximize the efficiency of the machine tool.

2. Monitoring of cutting sound during cutting In the automatic cutting process, generally when cutting starts, the sound of the tool cutting the workpiece is stable, continuous and brisk, and the movement of the machine tool is stable at this time. With the progress of the cutting process, when there are hard spots on the workpiece, tool wear or tool feeding, etc., the cutting process becomes unstable. The unstable performance is that the cutting sound changes, and the tool and the workpiece will collide with each other. The machine will vibrate. At this time, the cutting amount and cutting conditions should be adjusted in time. When the adjustment effect is not obvious, the machine tool should be suspended and the condition of the tool and workpiece should be checked.

3. Finishing process monitoring and finishing, mainly to ensure the machining size and surface quality of the workpiece, the cutting speed is high, and the feed rate is large. At this time, attention should be paid to the influence of built-up edge on the machined surface. For cavity machining, attention should also be paid to overcutting and yielding at the corners.

To solve the above problems, firstly, pay attention to adjusting the spray position of cutting fluid, so that the machined surface is always in cooling condition;

The second is to pay attention to observe the quality of the machined surface of the workpiece, and avoid quality changes as much as possible by adjusting the cutting amount. If the adjustment still has no obvious effect, it should stop to check whether the original program is reasonable.

It is especially important to pay attention to the position of the tool when suspending the inspection or stopping the inspection. If the tool stops during the cutting process, the sudden spindle stop will cause tool marks on the surface of the workpiece. Generally, the shutdown should be considered when the tool leaves the cutting state.

Tool monitoring The quality of the tool largely determines the processing quality of the workpiece. In the process of automatic machining and cutting, it is necessary to judge the normal wear condition and abnormal damage condition of the tool by means of sound monitoring, cutting time control, suspension inspection during the cutting process, and workpiece surface analysis. According to the processing requirements, the tools should be processed in time to prevent the processing quality problems caused by the tools not being processed in time.