Computer Numerical Control Machine Tool Fault Diagnosis and Maintenance Examples
Example 1:
A computer numerical control (CNC) machine is used to cut and shape metals in the manufacturing process of aerospace components. The machine was producing components with a jagged edge and producing parts that were of an incorrect dimension. After diagnosis and inspection it was found that the X-axis motors were defective and causing the machine to produce incorrect parts. The X-axis motors were replaced with new motors and the machine was calibrated to ensure the accuracy and quality of the components being produced.
Example 2:
The CNC machine was producing irregular parts, which were outside of the design and specifications. The machine was diagnosed and it was discovered that the components of the machine were running at different speeds and levels of speed. After inspection and diagnosis it was determined that the delta drives on the Y-axis were not running at the same speed as the other axis of the CNC machine. After replacing and recalibrating the delta drives to the correct speed, the machine was producing parts with accuracy and precision to the design of the components being manufactured.
Example 3:
The spindle of the CNC machine was producing loud vibrations and the parts being created were not within the specified tolerances. After examining the machine it was determined that the spindle bearings were worn and causing the vibration and the machine was not running efficiently. The spindle bearings were replaced and the machine was tuned and repaired to ensure it was running with the necessary accuracy and speed.
Example 4:
The CNC machine was having difficulty cutting the material and its accuracy was off when producing parts. The machine was examined and it was discovered that the sharpening device on the machine was not correctly calibrated and was not able to perform at its optimal level. After recalibrating the sharpening device and lubrication system the machine was running properly and producing parts with the necessary accuracy and precision.
Example 5:
The CNC machine was grinding the parts and the finish was of poor quality. After inspection and diagnosis it was determined that the grinders were chipped and worn, which was causing the poor finish on the parts. After replacing the grinders and sharpening them to the correct specifications the machine was producing parts that had the desired finish and quality.
Conclusion
Careful inspection, diagnosis and maintenance of CNC machine tools is essential for the efficient production of high quality parts and components. Fault diagnosis and repair of the machines is necessary to ensure the machine is running to its optimum potential and producing parts to the desired tolerances and specifications. By following a set maintenance program and routine, the operation of the CNC machines can be improved, leading to increased efficiency and productivity in the manufacturing process.
