Multi-point discrete precise straightening planning method for planar curved linear guide rail

Abstract

The invention discloses a multi-point discrete precise straightening planning method for a planar curved linear guide rail. The method comprises the following steps: establishing a comprehensive coordinate system; the linear guide rail deflection curve under the workpiece measurement coordinate system is converted to a workpiece reference coordinate system, and a discrete expression of the guide rail deflection curve is obtained; on the basis of boundary conditions of single-step straightening, according to a linear guide rail deflection curve expression, a matrix expression containing the straightening step number, the straightening step sequence, the straightening span of each straightening step and starting and ending point coordinates is obtained; the linear guide rail deflection curve under the workpiece reference coordinate system is converted into a workpiece straightening coordinate system, a straightening stroke is applied to a straightening pressure head local coordinate system, and a linear guide rail deflection curve expression after each straightening step is obtained under the workpiece straightening coordinate system; and after straightening is completed, the linear guide rail deflection curve expression under the workpiece straightening coordinate system is reversely converted into the workpiece reference coordinate system, and the linear precision of the linear guide rail is calculated. The straightening efficiency and the straightening precision can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of mechanical numerical control material forming, in particular to a multi-point discrete precision straightening planning method for plane curved linear guide rails. Background technique [0002] As a key functional component of the linear feed system, linear guides are widely used in CNC machining equipment and automation equipment. The ever-increasing high-speed, high-acceleration, high-stability and high-precision linear feed motion of CNC equipment has put forward higher requirements for the linear accuracy of linear guides. Straightening is a key process in the processing and manufacturing of linear guides, which is conducive to improving the linear accuracy of the guides while ensuring its wear resistance and service life. [0003] For linear guides with large initial deflection, long length and complex curved shape, single-step straightening has great limitations, and it is impossible to complete st...

AI Technical Summary

Problems solved by technology

[0003] For linear guides with large initial deflection, long length, and complex bending shape, single-step straightening has great limitations, and straightness correction cannot be completed through single-step straightening. Multi-step precision straightening is required to achieve straightness correction the goal of

Images