In CNC milling processing, the radial runout accuracy of NC spiral cutter is a key factor and has a profound impact on the stability of milling processing.
First, radial runout accuracy directly affects the uniformity of cutting force. When the NC spiral cutter has a large radial runout, the position and depth of contact between the cutting edge and the workpiece continue to change during rotation, resulting in fluctuations in the cutting force. For example, when milling a plane, radial runout will cause the tool to cut too much at certain moments and too little at other moments. This uneven cutting force will cause machine tool vibration. Larger vibration will not only reduce the quality of the machined surface and increase the surface roughness, but may also cause premature wear or even damage of the tool, seriously affecting the stability and efficiency of processing.
Secondly, it has a significant impact on the processing dimensional accuracy. Due to radial runout, the actual cutting trajectory of the tool deviates from the ideal trajectory. When milling features such as contours or holes, this deviation will be directly reflected in the machining dimensions, resulting in dimensional out-of-tolerance. For example, when milling a circular hole, the radial runout of the tool may cause the diameter of the circular hole to vary and the cylindricity to deteriorate, making it unable to meet the requirements of precision machining. Even under the compensation function of the CNC system, excessive radial runout will greatly reduce the compensation effect, making it difficult to ensure stable machining accuracy.
Furthermore, radial runout accuracy is related to the dynamic characteristics of the processing system. Higher radial runout excites the natural frequencies of the machine tool-tool-workpiece system, causing resonance phenomena. Resonance will sharply increase the vibration amplitude of the entire processing system, making the processing process extremely unstable. At this time, not only the machining accuracy cannot be guaranteed, but it may also cause permanent damage to the structure and accuracy of the machine tool, increase equipment maintenance costs and downtime, and reduce production efficiency.
The radial runout accuracy of NC spiral cutter plays a vital role in the stability of milling processing. During the manufacturing, selection and use of tools, the radial runout accuracy must be strictly controlled. Through precise manufacturing processes, reasonable tool installation and debugging, and regular inspection and maintenance, ensure that the radial runout of the tools is within the allowable range, thereby achieving Stable, efficient and high-precision CNC milling processing meets the strict requirements of modern manufacturing industry for processing quality and production efficiency.
