Each CNC machining center factory before the accuracy testing, debugging for a period of time, due to the bumpy road in the road, the customer received the equipment installation and commissioning need to re-examine the accuracy, so more understanding of some CNC machining center accuracy testing methods, the process of future errors can be self-test, timely detection of errors CNC machining center accuracy mainly includes geometric accuracy, positioning accuracy and cutting accuracy .
CNC Machining Center Geometric Accuracy
The geometric accuracy of CNC machining center reflects the geometric shape error of key mechanical parts of CNC machining center (such as bed, slide, column, spindle box, etc.) and its assembled geometric shape error, including the flatness of the table surface, the mutual perpendicularity of the movement in each coordinate direction, the parallelism of the movement in the X and Y coordinate direction of the table surface, the radial circular runout of the spindle hole, spindle axial runout, spindle box along The parallelism of the main axis when the spindle box moves in the direction of z coordinate axis, the straightness of the spindle moving in the direction of z coordinate and the perpendicularity of the spindle rotation axis to the table surface, etc. Commonly used inspection tools are precision level, precision square box, micrometer or micrometer, right angle meter, flat ruler, high precision spindle mandrel and micrometer rod magnetic seat, etc.
CNC Machining Center Positioning Accuracy
The positioning accuracy of CNC machining center refers to the position accuracy that the measured moving parts of CNC machining center can achieve when moving under the control of CNC system. This accuracy, like the geometric accuracy of the CNC machining center, will have an important impact on the cutting accuracy of the CNC machining center, and will especially affect the hole distance error during hole processing. The inspection tools for measuring linear motion are: standard length scoring ruler, group block gauge, micrometer, optical reading microscope and dual-frequency laser interferometer, etc. The standard length measurement is based on the measurement result of the double-frequency laser interferometer. Rotary motion detection tools have 360 teeth precision indexing standard rotary table or angle polyhedra, high-precision circular grating and parallel light tube, etc. At present, the common detectors are dual-frequency laser interferometer
Cutting Accuracy Inspection
CNC machining center cutting accuracy check is a comprehensive check of the geometric accuracy and positioning accuracy of the CNC machining center under the cutting processing conditions, including the single processing accuracy check and the accuracy check of the machined cast iron specimen (carbide tool cutting according to the standard cutting amount). Inspection items generally include: boring size accuracy and surface roughness, boring shape and hole distance accuracy, end mill milling plane accuracy, side milling cutter milling side straightness accuracy, side milling cutter milling side roundness accuracy, rotary axis turning 900 side milling cutter milling right angle accuracy, two-axis linkage accuracy, etc.