High-accuracy roundness detection method based on combination of reverse and multi-sensor methods

Abstract

The invention relates to a high-accuracy roundness detection method based on the combination of reverse and multi-sensor methods. The method comprises the following steps of: making two discs with the same shape error, taking one disc as a reference disc and rotating the other disc for 180 degrees coaxially, fixing the two discs mutually; arranging the fixed two discs on a testing platform of a roundness tester coaxially and enabling the circle centers of the two discs to be coincident with the rotation center of the roundness tester; and putting a detected workpiece on the discs and also enabling the circle center of the detected workpiece to be coincident with the rotation center of the roundness tester. In measurement, an inclined angle formed by two sensors connected with the discs is 180 degrees, workpiece shape errors in two paths of combined signals output by the sensors are same both in size and direction, and the rotation errors of a spindle are same in size and opposite in direction, therefore the rotation errors of the spindle can be separated out, and then the shape errors of the detected workpiece can be obtained, and the roundness of the detected workpiece can be obtained finally. By the method disclosed by the invention, the roundness of a workpiece can be measured accurately.

Description

technical field [0001] The invention relates to the field of roundness measurement, in particular to a high-precision roundness detection method based on the combination of reverse and multi-sensor methods. Background technique [0002] Roundness accuracy is one of the important indicators to measure the shape accuracy of cylindrical parts, and the size of the error will seriously affect its working performance. At present, there are many kinds of instruments used to measure the roundness error, among which the typical one is the roundness meter. The method of measuring the roundness error of the part on the roundness meter is the indication value of the roundness meter probe around the workpiece under test. It is considered to be the roundness error of the measured workpiece. For most mechanical equipment, the rotation error of the spindle of the roundness meter itself is very small relative to the roundness error of the workpiece to be measured, so it can be ignored. But...

AI Technical Summary

Problems solved by technology

In some special occasions, due to the limitation of structure and installation space, it is difficult to install more than 3 measuring sensors, which makes the installation of multi-side head method difficult

However, during the implementation of the transposition method, the measured parts need to be transposed, and there are transposition and positioning errors during the transposition process. In addition, there are harmonic suppression problems when the transposition method is used for measurement, and the measurement period is long, which is easily affected by the surrounding environment. environmental impact

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