Numerically-controlled machine tool high in positioning precision

Abstract

The invention belongs to the technical field of numerically-controlled equipment, and in particular relates to a numerically-controlled machine tool high in positioning precision. The numerically-controlled machine tool comprises a machine tool base of a hollow structure, wherein a column is arranged on the back side of the machine tool base; a spindle box is arranged in the middle of the upper end of the column; a spindle is arranged at the lower end of the spindle box; a drag chain is arranged on one side of the upper end of the column; a hanger is arranged on the other side of the upper endof the column; a worktable is arranged above the machine tool base; a primary spline shaft is arranged at the central position of the bottom of the worktable; a primary motor is arranged on the top of the machine tool base; a worm is arranged on the output shaft of the primary motor; and the bottom end of the primary spline shaft stretches into the machine tool base. The numerically-controlled machine tool high in positioning precision achieves fine adjustment of the height direction and the rotating angle of the worktable and solves the problem that the dimensional precision of a processed workpiece is directly affected as the height direction and the rotating angle of the worktable cannot be positioned precisely.

Description

technical field [0001] The invention belongs to the technical field of numerical control equipment, and in particular relates to a numerical control machine tool with high positioning accuracy. Background technique [0002] CNC machine tool is a common machining equipment. The main part is mainly composed of machine tool base, column, saddle, worktable, spindle box and other components. The five main parts of the main body are all made of high-strength and high-quality castings and resin sand molding, and the organization is stable. , to ensure that the whole machine has good rigidity and precision retention. The three-axis guide rail pair adopts a combination of high-frequency quenching and plastic-coated guide rails to ensure the running accuracy of the machine tool and reduce frictional resistance and loss. The three-axis transmission system is composed of precision ball screws and servo system motors, and is equipped with automatic lubrication devices. The three axes of...

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Problems solved by technology

[0003] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, and propose a CNC machine tool with high positioning accuracy, which realizes fine-tuning of the height direction and rotation angle of the workbench, enables high-precision positioning, and solves the problem of the height and rotation of the workbench. The angle cannot be fine-tuned and directly affects the dimensional accuracy of the processed workpiece

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