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What factors affect the accuracy of CNC machine tool manufacturers will be encountered in machine tool processing?

2021-05-26 06:41:42
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The main reasons for the radial rotation error of the spindle are: the coaxiality error of several sections of the journal of the spindle, the various errors of the bearing itself, the coaxiality error between the bearings, the spindle winding, and so on. However, the degree of influence on spindle radial rotation accuracy varies with different machining methods.


Such as on the lathe using sliding bearings as a spindle structure, turning cylindrical, can CNC machine tool sales thought is roughly constant cutting force in the direction F, in under the action of the cutting force F, in different place and main journal bearing inside diameter of a fixed place in contact, at this point, the main journal of roundness error of the spindle rotation accuracy of impact is bigger, And bearing inner diameter of the roundness error of the spindle rotation accuracy of a smaller effect, when drilling in the boring machine, due to the effect of cutting force F direction rotates with the rotation of the spindle, the spindle neck under the action of cutting force F, always at a fixed place and different parts of the bearing inner surface in contact, therefore, bearing inner surface of the roundness error of the spindle rotation accuracy of impact is bigger, However, the roundness error has little effect on the spindle journal under the action of cutting force F.


The machining error caused by spindle rotation error varies with different machining methods. The radial rotation error of the spindle can cause the roundness and cylindricity error of the workpiece when the outer circle and inner hole are processed by the lathe, but it has no direct effect on the end face of the workpiece. The influence of axial rotation error on the outer circle and inner hole of spindle machining is small, but the influence of special CNC machine tool on the verticality and flatness of end face is great. The principal axis deviation may cause the lead period error in the process of turning thread. In the processing process, the proper improvement of spindle and box processing accuracy, the selection of high-precision bearings, improve the assembly accuracy of spindle parts, high-speed spindle parts for balance, rolling bearings for pre-tightening, small CNC machine tools can improve the rotation accuracy of machine tool spindle.


机床加工中会遇到数控机床厂家哪些因素影响精度?

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