At present, the classification of Kunshan CNC machining lathes is mainly set precision, position precision and machining precision. The material stiffness of different brands of CNC lathes is different (the quality of CNC lathe equipment), and the working temperature will have a variety of effects on the accuracy of Kunshan CNC machining. The geometric accuracy of Kunshan CNC lathe can be further subdivided into spindle geometric accuracy and linear motion accuracy.
In the processing operation of the CNC lathe, the relative position between the spindle and the rotary shaft remains relatively fixed. The actual production and theoretical knowledge are not identical. The relative spatial position between the two shafts does not have to be relatively fixed. This is because the bearing elements constituting the spindle may have different degrees of error in the manufacturing plant of lathe equipment, and will be affected by temperature, working strength, lubrication and other conditions during use. Due to the bearing accuracy of the main shaft, the manual assembly quality of the main shaft box is different, the mechanical vibration during the processing of the main shaft and rotating parts produces runout, the roundness of the bearing journal of the central shaft is unstable during the manufacturing process, there is a certain error in the front and back concentricity, and thermal deformation may occur during the working process of the main shaft. These factors all affect the geometric accuracy of the spindle of CNC lathe.
In addition to the geometric accuracy error generated by the spindle in the processing of Kunshan CNC lathe, the track may also affect the position accuracy of the machine due to the inertia matching problem of friction and servo motor used in the processing of CNC lathe. Kunshan CNC lathe processes some parts that need uninterrupted work, such as cylinder pumps, motors, hydraulic machines, etc., which need to work continuously for a long time (even 24 hours). During the working process, friction causes specific internal parts to deform due to thermal expansion of processing heat, which leads to deviation between the actual production size and the designed predetermined size of the parts. Due to the role of internal heat, the asymmetry of CNC lathe equipment components leads to deformation of production and processing parts. Therefore, the thermal deformation of Kunshan CNC lathe equipment components will have a critical impact on the position accuracy of the machine.
The machining accuracy of Kunshan CNC machining lathe is closely related to the geometric accuracy of integral CNC lathe machining, in addition to the position accuracy, it is also related to the transmission system fault of CNC lathe machining, the fault compensation system inspection, the friction of machine tool structural parts, the tool position error, etc., and it is also related to whether the program editing of Kunshan CNC machining lathe is correct, and whether the production process is reasonable. Therefore, in actual production, in order to improve the machining accuracy of CNC lathe, it is necessary to improve the geometric accuracy and position accuracy of CNC lathe machining.