Grinding track solving method for machining non-circular special-shaped shaft through segment difference grinding technology

Abstract

The invention discloses a grinding track solving method for machining a non-circular special-shaped shaft by adopting a segment difference grinding process, which specifically comprises the following steps of: dividing a non-circular contour of the special-shaped shaft into three types of basic contours of a non-circular linear type, a non-circular convex arc type and a non-circular concave arc type under a shaft section coordinate system; and the section difference grinding track and the contour connecting area of the constant-section non-circular special-shaped shaft grinding wheel are calculated, then the section difference grinding track of the variable-section non-circular special-shaped shaft grinding wheel is calculated, and the track is converted into a workpiece coordinate system to complete track solving. According to the method, flexible combination of the axial section contours can be achieved, parameterization design of the axial section guide lines can be achieved, smooth transition between non-circular contour features is guaranteed, and the grinding machining efficiency, the surface quality and the precision are improved.

Description

technical field [0001] The invention belongs to the technical field of non-circular special-shaped shaft grinding, and in particular relates to a grinding trajectory solving method for processing a non-circular special-shaped shaft by using a step difference grinding process. Background technique [0002] The non-circular shaft is an important part in the automotive, aerospace and other industries. Due to the special use occasions, its machining accuracy has a decisive impact on the overall equipment performance [1]. From a technical point of view, the processing of non-circular contour parts can be divided into three stages [2]. The first stage is a mechanical motion synthesis processing method based on a special machine tool, which is suitable for mass production but the processing method is less flexible. The second stage is to rely on the profiling method, relying on the template or the mold to control the tool movement trajectory for processing, the process is simple, b...

AI Technical Summary

Problems solved by technology

From a technical point of view, the processing of non-circular contour parts can be divided into three stages [2]. The first stage is the mechanical motion synthesis processing method based on special machine tools, which is suitable for mass production but the processing method is less flexible.

The second stage is to rely on the profiling method, relying on the model or model to control the trajectory of the tool for processing. The process is simple but the problem of low precision and poor flexibility has not been improved [3]

To sum up, most domestic researches only explore the grinding process of non-circular shafts with constant cross-section, but in actual production, there may be a demand for variable and controllable shaft-section guide lines for variable-section special-shaped shafts

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