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在立式车床右、左垂直刀架走刀过程中,自立柱端沿横梁移动至中央位置时,由于刀架部件的重力作用,横梁产生下挠变形,这一平行于工作台台面方向的弹性变形,称为横梁的Z向变形。横梁在单件加工中,为克服Z向变形引起的刀具位移误差(即加工工件精度误差),通常采用预测变形量的工艺方法,以补偿这一弹性变形的影响。如图1所示为一台大型立式车床,预测一个刀架运行至中央位置时的横梁Z向变形量为0.09mm,则导轨面K应保证加工成为图1中b所示的曲线,其曲线凸起部份为:△T_k=0.09mm。这样,才能保证在
In the vertical lathe right and left vertical knife rack in the process of walking, self-column column along the beam to move to the central position, due to the weight of the turret components, the beams produce under the deformation, the parallel to the bench table direction of the elastic Deformation, known as the beam of the Z-deformation. Beam in the single-piece processing, to overcome the Z-deformation caused by the tool displacement error (that is, the accuracy of the workpiece error), usually using the prediction of deformation of the process to compensate for the impact of this elastic deformation. Shown in Figure 1 is a large vertical lathe, predicting a knife to run to the central position of the beam when the Z deformation is 0.09mm, the guide surface K should be guaranteed to be machined into the curve shown in Figure 1 b, which Raised part of the curve: △ T_k = 0.09mm. In this way, in order to ensure that