A lathe in which the spindle axis of the CNC vertical lathe is perpendicular to the horizontal plane and the workpiece is installed on the horizontal rotary table is referred to as the vertical lathe. Vertical lathes are usually used to process workpieces that are relatively large in diameter and weight, or difficult to install on a horizontal lathe. In order to meet the needs of processing small and medium-sized workpieces, the small and medium-sized CNC vertical lathes are mostly single-column type. Large vertical lathes are mainly double-column type, with two vertical tool rests. The workpiece is clamped on the worktable of the vertical lathe, and the main movement is driven by the worktable to rotate. The feed movement is realized by the vertical tool post and the side tool post. Both of them can be moved along the corresponding guide rail in the vertical and horizontal directions. give. The vertical tool holders of these two vertical lathes usually have a turret that can install several sets of tools, which is equivalent to a vertical turret lathe. The column or worktable of some vertical lathes can also be made movable to expand the processing diameter range.
Under the action of external force, the basic parts of the CNC vertical lathe will bear bending and torsion loads. The bending and torsion deformation depends on the bending and torsional moment of inertia of the base part. The bending and torsional moment of inertia is large. The deformation is small and the rigidity is high. Moments of inertia of different cross-sectional shapes and sizes. When the shape and cross-sectional area are the same, reducing the wall thickness and the profile size of the section can greatly increase the rigidity; the rigidity of the closed section is much higher than that of the unclosed section; the torsional rigidity of the circular section is higher than that of the square section, and the bending resistance The stiffness is lower than that of the square section; the rectangular section has a high flexural rigidity in the direction of larger size. Therefore, by rationally designing the cross-sectional shape and size, the static rigidity of the structure of the foundation can be greatly increased.