CNC vertical machining center: How to improve machining accuracy
The centerline of the spindle of the CNC vertical machining center is set in a vertical state, and there are two types of structures, such as fixed column type and mobile column type. The advantages are small footprint, simple structure, relatively low price, convenient clamping operation, simple debugging procedure and wide range of applications.
As a high-precision and efficient processing equipment, how to improve the accuracy of CNC vertical machining center?
1.Method 1 for improving machining accuracy of CNC vertical machining center:Error synthesis method
The main method to eliminate the error of the CNC machine tool itself and ensure the machining accuracy of the workpiece. The error synthesis method requires measuring the original error of each axis of the machine tool. The laser interferometer has high measurement accuracy and is flexible to use, and is the main detection instrument.
2.Method 2 for improving machining accuracy of CNC vertical machining center:Error compensation method
Artificially create an error to offset the original error inherent in the process system, or use one original error to offset another original error, so as to achieve the purpose of workpiece processing accuracy. Generally, by reducing the machine tool gap, improving the machine tool rigidity, selecting the preload force, and generating the preload force through relevant cooperation, the influence of the gap is eliminated.
The rigidity of the process system can also be improved by increasing the rigidity of the workpiece and the tool and reducing the overhang length of the tool and the workpiece. There are also several methods such as choosing a reasonable clamping method and processing method, reducing the cutting force and its changes, reasonably selecting the tool material, increasing the rake angle and the main deflection angle, reasonably heat treating the workpiece material, and improving the processing performance of the material.
3.Method 3 for improving machining accuracy of CNC vertical machining center:Direct reduction of original error method
It means finding out the main original error factors that affect the machining accuracy of parts, and then directly trying to eliminate or reduce the original error.
4.Method 4 for improving machining accuracy of CNC vertical machining center:Error uniformity method
Use closely related surfaces to compare and correct each other, or use each other’s benchmarks for processing to achieve the purpose of eliminating processing errors.
5.Method 5 for improving machining accuracy of CNC vertical machining center:Error transfer method
It is the induced error caused by the mobilization error, stress deformation, thermal deformation, etc. of the transfer process system.
6.Method 6 for improving machining accuracy of CNC vertical machining center:Error grouping method
Because there is a blank error in the process, the processing error of the process is formed. The change of blank error has two main effects on the process: reaction error and positioning error.
Mastering some methods to improve the accuracy of CNC vertical machining centers is an indispensable operating skill for operators. I hope this article will be helpful to you.