CNC machining is controlled by a computer
after programming. Therefore, CNC machining has the advantages of stable
machining quality, high machining accuracy, high repeatability, can process
complex profiles, and high machining efficiency. CNC machining has become the
mainstream processing equipment in the processing field. . In the actual
processing process, human factors and operating experience will affect the
processing quality of the workpiece to a large extent.
As we all know, the workpiece can enter
the automatic processing stage after the alignment and program debugging are
completed. However, in the automatic processing of CNC machine tools, the
operator needs to monitor the cutting process to prevent abnormal cutting from
causing workpiece quality problems and other accidents.
During the machining process, it is
important to monitor several aspects of the CNC machining process.
Monitoring on rough machining
The main consideration of the machining
process monitoring rough machining is the rapid removal of the excess margin 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 cutting load changes in the automatic machining
process through the cutting load table, adjust the cutting amount according to
the bearing capacity of the tool, and give play to the efficiency of the
machine tool.
Monitoring on cutting sound
Finishing monitoring
The finishing process monitoring
finishing is mainly to ensure the processing 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 impact of built-up edge on the machined surface.
For cavity machining, attention should be paid to overcutting and cutting at
corners. To solve the above problems, one is to pay attention to adjusting the
spray position of the cutting fluid so that the machined surface is always in a
cooling condition; the other is to pay attention to the quality of the machined
surface of the workpiece, and adjust the cutting amount to avoid quality
changes as much as possible. If the adjustment still has no obvious 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
the inspection is suspended or stopped. If the tool stops during the cutting
process, a sudden spindle stop will cause tool marks on the surface of the
workpiece. Generally, consider stopping the tool when it leaves the cutting
state.
Monitoring on tool
The quality of the tool largely determines
the processing quality of the workpiece. In the automatic machining and cutting
process, it is necessary to judge the normal wear condition and abnormal damage
condition of the tool through methods such as sound monitoring, cutting time
control, pause inspection during cutting, and workpiece surface analysis.
According to the processing requirements, the cutting tools should be processed
in time to prevent the processing quality problems caused by the cutting tools
not being processed in time.
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