Fast positioning device for center of precision shaft-like workpiece and detecting method

Abstract

The invention discloses a fast positioning device for the center of a precision shaft-like workpiece and a detecting method. A center positioning rod of the device passes through the center of an arched base, a target ball is arranged on the top surface of the center positioning rod, and a horizontal scale is arranged in the middle of the top surface of the arched base. In the detecting method, the arched base is placed on the surface of a shaft-like workpiece, the bottom of the center positioning rod is lowered to the surface of the shaft-like workpiece, and the arched base is adjusted so that a bubble of the horizontal scale is set in the center; the plane position of the target ball is measured using precision laser measuring equipment; the lifted length A of the center positioning rod is measured, the length B of the center positioning rod and the width C of the arched base are known, and the height H from the center of the shaft-like workpiece to the top surface of the center positioning rod can be obtained; and the above measurement is repeated after the arched base rotates 180 degrees, and the center position of the shaft-like workpiece can be obtained by taking the average of the two measurements. The device and the method facilitate the fast positioning and detection of the center of the shaft-like workpiece, guarantee the detection precision, improve the detection efficiency and reduce the maintenance and repair cost of the equipment.

Description

technical field [0001] The invention relates to a fast positioning device and a detection method for the center of a precision shaft workpiece. Background technique [0002] When precision laser measuring equipment such as laser tracker and total station are used to detect the spatial position and shape tolerance of precision shaft workpieces, it is usually necessary to detect and locate the center of the shaft workpiece as a detection reference or detection object. assessment. Conventional shaft workpiece center detection methods need to collect the surface feature points of the shaft workpiece, or collect the rotation track of the shaft workpiece to determine the shaft center. This type of method has strict requirements on the environment of on-site detection, and requires a large acquisition space or rotation space. For non-standard workpieces such as arc-shaped shaft workpieces, it is more difficult to collect feature points, and the uncertainty of the axis center is ge...

AI Technical Summary

Problems solved by technology

This type of method has strict requirements on the environment of on-site detection, and requires a large acquisition space or rotation space. For non-standard workpieces such as arc-shaped shaft workpieces, it is more difficult to collect feature points, and the uncertainty of the axis center is generated. In particular, when the maintenance period or detection conditions are limited, when the conventional positioning detection method of the axis workpiece center is adopted, the detection efficiency is low, the detection time is long, and the detection accuracy is poor, which affects the operation efficiency of on-site maintenance.

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