These tests of the machine tool shall be carried out in the order described above. The accuracy of the workpiece to be processed and its surface roughness inspection can be carried out at the same time as the machine tool load test or before the geometric accuracy inspection.
The accuracy inspection includes the inspection of the geometric accuracy of the machine tool, the accuracy of the machined workpiece and its surface roughness. The geometric accuracy test of the machine tool includes: checking the straightness of the guide rail: the flatness of the worktable; the deviation of the column and the bottom plate from the vertical plane and the horizontal plane: the positioning accuracy and rotation accuracy of the spindle; the parallelism and perpendicularity of the relative position of the shaft and the surface: the wire Errors of levers and rotary devices, etc. All machine tools of a specific model should be inspected according to GOST.
The geometric accuracy test alone is not enough to judge the performance of the machine tool. Because this kind of test cannot measure the rigidity of machine tool components, the change of manufacturing and assembly quality, especially the influence of rigidity of machine tool-fixture-tool-workpiece system on machining accuracy. Therefore, the national standard mandates the inspection standards for machine tool accuracy, including the accuracy of workpiece samples and surface roughness inspection. These tests should be carried out after the initial idle running or load test of the machine tool and after the main parts of the machine tool have a stable working temperature. Corresponding standards have been formulated for the types, materials and processing characteristics of various machine tool workpiece samples.
Maintenance of machine tools
The machine tool is maintained according to the planned maintenance system (ie PMS). This system can comprehensively measure the maintenance, inspection and overhaul of the equipment, thereby preventing the wear and tear of the equipment and contributing to the normal operation of the equipment.