Method and device for automatic detection of composite errors of ball screw spiral raceway

Abstract

The invention discloses a method for automatic detection of composite errors of a ball screw spiral raceway, which comprises the following steps of: firstly, carrying out sampling preparation; then, sampling the axial position and the radial position of each point on a normal section curve of the screw spiral raceway to be detected by using a grating ruler and an optical screen type displacement sensor; then, processing the sampling data, and acquiring the normal section error and the pitch diameter dimension error of the screw spiral raceway to be detected in the rotating angle position; and after rotating the screw to be detected by 360 degrees / n, repeating the processes for n-1 times to acquire normal section errors and pitch diameter dimension errors of the ball screw spiral raceway to be detected under different rotating angle degrees, and taking the maximum values of the normal section error and the pitch diameter dimension error on each circle of raceway under each rotating angle degree as an actual normal section error and an actual pitch diameter dimension error of a screw to be detected. The invention also discloses a device for automatic detection. The method and the device for automatic detection can be used for achieving the purpose of automatic detection of the composite errors of the ball screw spiral raceway, and have good effect and high precision.

Description

technical field [0001] The invention relates to a method and a device for comprehensively detecting the error of a ball screw helical raceway, in particular to a method and a device for automatically detecting the comprehensive error of a ball screw helical raceway. Background technique [0002] The ball screw pair is mainly composed of a ball screw, a ball and a screw nut, and is mainly used to convert the rotary motion of the motor into the required linear motion. It can achieve very high transmission and positioning accuracy, and is widely used in the feed transmission system of various precision machine tools. The comprehensive error of the spiral raceway of the ball screw refers to the error in the shape and position of the spiral raceway during the manufacturing process, including the normal truncation error and pitch diameter size error. Among them, the normal section of the raceway refers to the shape of the intersection line between the plane passing through the ce...

AI Technical Summary

Problems solved by technology

However, the detection accuracy obtained by this method is limited by the resolution in the visual detection process and is easily affected by factors such as image deformation and image processing methods, so it is difficult to meet the high-precision detection requirements of the comprehensive error of the ball screw pair spiral raceway (the paper [ 1]: Hunsicker Randal J. Automatic vision inspection and measurement system for external screw threads. Journal of Manufacturing Systems, v13, n5, 1994, p370-384)

In terms of the comprehensive error detection of the ball screw spiral raceway, there is no automatic detection method with high detection accuracy and high detection efficiency at home and abroad.

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