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Improved three-point method turning error and roundness error calculation method

A technology of rotation error and calculation method, which is applied in the direction of measuring devices, instruments, and optical devices, etc., can solve the problems of three-point method rotation error, etc., and achieve the effect of improving accuracy and separation accuracy

Active Publication Date: 2013-10-23
GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

[0007] The purpose of the present invention is to propose an improved three-point method calculation method for rotation error and roundness error in order to solve the defect that the ordinary three-point method ignores the first-order component of the shape error

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  • Improved three-point method turning error and roundness error calculation method
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  • Improved three-point method turning error and roundness error calculation method

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing:

[0023] Such as figure 1 As shown, the three displacement sensors are pressed by image 3 As shown in the position arrangement, the part rotates clockwise, and the rotation angle is represented by θ. The outputs of the three displacement sensors are S1(θ), S2(θ), and S3(θ), which include the shape error r(θ) of the cylindrical part, The relationship between x-direction component x(θ) and y-direction component y(θ) of rotation error is as follows:

[0024] S1(θ)=r(θ)+x(θ) (1)

[0025] S2(θ)=r(θ+α)+x(θ)*cos(α)+y(θ)*sin(α) (2)

[0026] S3(θ)=r(θ+β)+x(θ)*cos(β)+y(θ)*sin(β) (3)

[0027] Error separation is to separate the shape error r(θ), rotation error (x(θ), y(θ)) from the three measured outputs S1(θ), S2(θ), and S3(θ).

[0028] The specific algorithm is:

[0029] Construct a function S(θ) consisting of S1(θ), S2(θ), and S3(θ):

[0030] S(θ)=S1(θ)+a*S2(θ)+b*S3(θ) (4)

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Abstract

The invention discloses an improved three-point method turning error and roundness error calculation method, which comprises the following steps of: translating and carrying out weighted average on three sensor signals, and carrying out frequency domain filtering to effectively obtain a one-order component of a form error. According to the method, the separation precision of the form error and the turning error can be obviously improved, and a surface is simulated; under the condition that the sensor is free from the noise interference, the separation precision of the form error and the turning error can be 10-8 orders of magnitude; and the measurement precision of the turning error and the roundness error can be effectively improved.

Description

technical field [0001] The invention relates to the measurement of the rotation error of precision rotating machines such as machine tools, or the measurement of the roundness error of cylindrical parts, in particular to an improved three-point method for calculating the rotation error and the roundness error. Background technique [0002] The rotation error of the machine tool spindle is an important index to measure the performance of the machine tool and the main factor affecting the machining accuracy. The measurement technology of spindle rotation error plays an important role in the development of precision machine tools. The rotation error of the precision centrifuge spindle is also the main factor affecting the performance of the precision centrifuge. Therefore, the precise measurement technology of spindle rotation error has attracted the attention of many scholars for a long time. They have carried out long-term and in-depth research on it by using different techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
Inventor 牛宝良张荣
Owner GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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