An Offset Torsion Beam Elastic Tailstock

Abstract

The invention provides an offset torsion beam elastic tailstock used for automatic clamping of a numerically-controlled machine tool. According to the offset torsion beam elastic tailstock, a tip is installed in an offset mode to form a torsion beam structure, clamping force is obtained through a compression spring, and quick advancing and retreating of the tailstock is achieved through a rolling linear guiding rail; when top clamping force is exerted on the tip, the offset torsion beam structure enables a box body of the tailstock to abut against a planar sliding friction guiding rail perpendicularly installed on the lateral side to be positioned accurately and generate pretightening force on the guiding rail; when radial action force is exerted on the tip in the horizontal direction, balance can be achieved effectively through the pretightening force, machining interference of the offset torsion beam elastic tailstock is reduced, positioning is accurate, and vibration and abrasion can be effectively reduced. The offset torsion beam elastic tailstock is suitable for a metal cutting numerically-controlled machine tool according to which a tip needs to be installed in the offset mode and the tip bears radial alternating cutting resistance which is exerted in the horizontal direction during machining.

Description

technical field [0001] The invention relates to a tailstock mechanism for a numerically controlled machine tool, in particular to a tailstock mechanism for a numerically controlled machine tool with a mechanical structure in which the tail tip is offset to form a torsion beam and which is automatically clamped. Background technique [0002] The tailstock is an essential part of a general machine tool, and its function is to locate and support the tail end of the workpiece shaft to be processed. The functions of the tailstock of the traditional CNC machine tool have been expanded on the basis of the original machine tool tailstock, including CNC drive, automatic top clamping, etc. However, the general CNC machine tool tailstock still follows the original tailstock design. The sleeve-type top tailstock is driven by hydraulic pressure and adopts sliding friction guide rails. , that is, the coaxial drive. There are deficiencies in the application of this type of tailstock on t...

AI Technical Summary

Problems solved by technology

For example, the tail tip of the metal cutting machine tool often bears the radial alternating cutting resistance in the horizontal plane, and the sleeve seat hole will produce unilateral wear under the repeated alternating cutting resistance, which will reduce the positioning accuracy of the workpiece and increase the vibration of the workpiece during processing. Large, if you want to restore the accuracy, you need to replace the top sleeve and sleeve seat by maintenance. The movement of the tailstock adopts the sliding friction guide rail. Although the positioning accuracy and rigidity can be achieved, the friction coefficient of the sliding friction guide rail is large, and the guide rail is easy to wear. Rolling linear guides will lead to insufficient rigidity, and the coaxial drive tailstock interferes with some processing operations. Only the top is lengthened and the rigidity of the tailstock is reduced. In addition, the hydraulic drive tailstock and the top sleeve are used, and the hydraulic system of the machine tool needs to work continuously. , higher energy consumption and more complicated structure

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