What are the treatment methods for the radial runout of CNC machine tools?
In the process of CNC milling machine cutting, there are many reasons for machining error. The error caused by the radial runout of the tool is an important factor, which directly affects the minimum shape error and the machined surface that the machine can achieve under ideal machining conditions. Geometric shape accuracy. In actual cutting, the radial runout of the tool affects the machining accuracy, surface roughness, tool wear unevenness and cutting process characteristics of the multi-tooth tool. The greater the radial runout of the tool, the more unstable the machining state of the tool, and the more the machining effect is affected.
First, the cause of radial runout
The manufacturing error of the tool and the spindle component, the clamping error and the drift and eccentricity between the tool axis and the ideal axis of the spindle, as well as the specific machining process and tooling, may cause the radial runout of the CNC milling tool during machining.
1. The influence of the radial runout of the spindle itself
The main causes of the spindle radial runout error are the coaxiality error of each journal of the main shaft, various errors of the bearing itself, the coaxiality error between the bearings, the deflection of the main shaft, etc., and their influence on the radial rotation accuracy of the main shaft. It varies with the processing method. These factors are formed during the manufacture and assembly of the machine tool, and it is difficult for the operator of the machine tool to avoid the effects.
2. The influence of the inconsistency between the tool center and the spindle rotation center
When the tool is installed in the spindle, if the center of the tool and the center of rotation of the spindle are inconsistent, the radial runout of the tool will inevitably occur. The specific influencing factors are: the fit of the cutter and the chuck, the correct method of the upper knife and the quality of the cutter itself.
3. The impact of specific processing
The radial runout of the tool during machining is mainly due to the radial cutting force exacerbating the radial runout. The radial cutting force is the component of the total cutting force in the radial direction. It will cause the workpiece to bend and deform and generate vibration during processing, which is the main component that affects the processing quality of the workpiece. It is mainly affected by factors such as the amount of cutting, the tool and the material of the tool, the geometry of the tool, the lubrication method and the processing method.
