Compensation mechanism for stress deformation of spindle box of machine tool

Abstract

The invention relates to a compensation mechanism for stress deformation of a spindle box of a machine tool, wherein the spindle box is arranged between two upright columns, thereby forming a gate-type thermal deformation symmetrical structure; two guide rails and sliding blocks are respectively arranged on front and back contact walls between the spindle box and the two upright columns, thereby forming a vertical guiding support; the compensation mechanism further comprises two compensation cylinders, two transition connection plates and two support shells; the two compensation cylinders arerespectively arranged in the two support shells; the two support shells are symmetrically arranged at two sides of the upper end face on the rear part of the spindle box; two ends on one side wall ofeach transition connection plate are respectively connected to two sides of the upper end face on the rear part of the spindle box and corresponding to the sliding blocks of the guide rails; the two support shells, in which the compensation cylinders are arranged, are respectively arranged on the other side walls of the transition connection plates corresponding to the sliding blocks; and the piston rod ends of the compensation cylinders prop against the other side walls of the transition connection plates corresponding to the sliding blocks. According to the compensation mechanism provided by the invention, the deformation compensation mechanism is arranged inside a sliding sleeper. The compensation mechanism provided by the invention can be used for solving the problem of suspension stretching flexible deformation caused by the change of gravity center of a spindle component in the moving process of the spindle box and can be used for dynamically compensating the stress deformation generated by the spindle box in real time.

Description

technical field [0001] The invention relates to machine tool equipment, in particular to a compensation mechanism for stress deformation of a machine tool spindle box. Background technique [0002] The spindle box is the key component of the machine tool. During the movement of the spindle box, the front end of the spindle often sags due to the change of the center of gravity, which affects the dynamic performance of the machine tool and the machining accuracy of the parts. How to design the compensation device is very important to improve the motion accuracy of the headstock. [0003] At present, many machine tool designs use front-end balance oil cylinders. One or two balance oil cylinders are arranged at the front end of the column to lift the spindle box and overcome the deformation of the spindle group due to gravity. The front balance oil cylinder often depends on the stroke of the headstock and has a large volume. If the single cylinder offset form is used, it is e...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN201010248293 discloses a two-way compensation device for deflection and deformation of a ram, which mainly solves the problem that the existing rod compensation device causes the axial deformation of the ram due to the eccentricity of the rod. Rod and the thrust cylinder connected with the pressure rod, the pressure rod and the pull rod are symmetrical up and down along the centerline of the milling axis, and the left and right symmetry between the two pressure rods is symmetrical along the centerline of the milling axis, and the thrust cylinder is in the headstock

This device simply improves the internal rigidity of the ram, and cannot perform position compensation for the stress and deformation of the headstock wrapping the ram

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