Monitoring Of CNC Machining – How To Monitor & Adjust CNC Machining Process

1. Monitoring of rough machining

Monitoring the cutting process mainly considers the following aspects:

Preliminary machining monitoring is focused on the removal of extra allowances that build up on the workpiece surface. The automatic machining process of a machine tool automatically cuts according to the planned cutting route and the set cutting parameters established by the tool operator. When the automatic machining process is underway, the operator should keep an eye on the cutting load table and make adjustments to the cutting parameters based on the tool bearing force in order to maximize the tool’s performance.

2. Monitoring of cutting sound 

The sound of the tool cutting the workpiece is stable, continuous, and light at the commencement of cutting in the process of automatic cutting. The machine tool’s motion is stable at this time. When the cutting process progresses, the cutting process will be unstable if the workpiece has hard patches, tool wear or tool clamping. The cutting sound will fluctuate, there will be a mutual impact sound between the tool and the workpiece, and the machine tool will vibrate as a result of the unstable performance. This is the period when the cutting parameters and cutting circumstances must be changed. An inspection of tools and workpieces is required when adjustment results aren’t immediately apparent.

3. Monitoring of finishing machining

A watchful eye will be kept on the last stages of the job. The major goal is to ensure that workpieces are machined to the proper size and quality, as well as that cutting speed and feed rate are both high. When it comes to chip accumulation on the machining surface, attention should be paid. Attention must also be paid to overcutting and tool yield at the corner while cavity machining. In order to address the aforementioned issues, you should first focus on adjusting the spraying position of cutting fluid in order to maintain cooling conditions on the machining surface at all times. Second, you should focus on the quality of the machined surface of the workpiece and avoid quality changes as much as possible by adjusting the cutting parameters. Stop the machine and verify that the original software is appropriate if the adjustment still has no apparent effect.

When suspending or stopping an examination, pay particular attention to the tool’s location. The sudden spindle stop will leave tool marks on the workpiece’s surface if the cutting tool stops cutting. When the tool is no longer in the cutting condition, it’s time to shut it down.

4. Tool monitoring

The quality of the workpiece is greatly determined by the quality of the tool monitoring. Sound monitoring, cutting time control, stop inspection in the cutting process, workpiece surface analysis and so on can be used to determine normal wear and abnormal damage conditions of the tool in the process of automatic machining and cutting. Processing demands dictate that cutting tools be handled in a timely manner in order to avoid difficulties with processing quality caused by late handling of cutting tools.