Introduction to some small knowledge of high precision cnc machine
The accuracy of the high precision cnc machine mainly includes the geometric accuracy of the machine tool, the positioning accuracy of the machine tool and the cutting accuracy of the machine tool. Now, based on the experience I have accumulated in my daily work, I will give a comprehensive description of these precision testing items, testing methods and precautions.
The geometric accuracy of the CNC machine tool reflects the geometric shape error of the key mechanical parts of the machine tool (such as the bed, slide, column, spindle box, etc.) and the geometric shape error after assembly, including the flatness of the work surface, The mutual perpendicularity of movement, the parallelism of the movement in the X and Y coordinate directions of the worktable, the radial runout of the spindle hole, the axial movement of the spindle, and the parallelism of the spindle axis when the spindle box moves along the z coordinate axis direction , The straightness of the spindle moving in the z-axis coordinate direction and the verticality of the spindle's rotation axis to the worktable surface, etc.