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Structural parameter optimization method for non-contact R-test measuring instrument

A non-contact, structural parameter technology, applied in measurement devices, instruments, electrical devices, etc., can solve the problems of low measurement accuracy and poor measurement sensitivity, and achieve the effect of improving measurement accuracy

Active Publication Date: 2019-01-01
成都天佑创软科技有限公司 +1
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Problems solved by technology

[0003] The object of the present invention is: the present invention provides a method for optimizing the structural parameters of a non-contact R-test measuring instrument, which solves the problem of poor measurement sensitivity and low measurement accuracy of the existing contact R-test measuring instrument due to contact wear and mechanical structure The problem

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  • Structural parameter optimization method for non-contact R-test measuring instrument
  • Structural parameter optimization method for non-contact R-test measuring instrument
  • Structural parameter optimization method for non-contact R-test measuring instrument

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Embodiment 1

[0110] Such as figure 2 , 3 , 5 and 6, establish a structural model including three non-contact eddy current displacement sensors and a measuring ball 1 uniformly distributed; the three non-contact eddy current displacement sensors are respectively sensor A5, sensor B6 and sensor C7; Such as Figure 4 As shown, the measurement sensitivity index Prec of the non-contact R-test measuring instrument changes with the change of the sensor elevation angle α, first monotonically increasing and then monotonically decreasing. It is determined that when α=33.69°, the measurement sensitivity index Prec reaches the maximum; On the basis of measurement sensitivity (take α=33.69°), the relationship between the measurement space S of the non-contact R-test measuring instrument and the sensor center distance λ (r max = 4mm, R 探 = 7mm, R 球 =15mm, δ=4mm) As shown in 8, it is determined that when λ=14mm, the measurement space S is the largest, about 33mm 3 .

[0111] The calculation proces...

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Abstract

The invention belonging to the field of the rotating shaft error measuring instrument of the non-contact R-test five-axis numerical control machine tool discloses a structural parameter optimization method for a non-contact R-test measuring instrument. The method comprises: step one, establishing a structural model of a non-contact R-test measuring instrument with an eddy current displacement sensor and preprocessing a coordinate of the structural model; step two, constructing a measurement sensitivity equation based on induced voltages measured in the step one and by the sensor to obtain a sensor elevation angle corresponding to sensitivity maximization; step three, calculating a measurement constraint equation of each sensor based on the structural model with the maximum sensitivity; andstep four, calculating the number, being the measuring space volume, of measuring points meeting a measurement constraint equation simultaneously and then acquiring a sensor central space corresponding to measuring space maximization, thereby completing the structural parameter optimization. Therefore, problems of low sensor reading sensitivity and low measuring precision of the existing contactR-test measuring instrument due to the contact wearing and the mechanical structure are solved; and the accurate measurement of the measuring instrument is realized.

Description

technical field [0001] The invention belongs to the field of non-contact R-test five-axis numerical control machine tool rotation axis error measuring instrument field, in particular to a structural parameter optimization method of the non-contact R-test measuring instrument. Background technique [0002] With the increase of the service life of the machine tool, due to wear, deformation and other reasons, the geometric accuracy of each part of the machine tool decreases, resulting in a decrease in machining accuracy. Accurately measuring the error of the tool tip point of the machine tool is the key to error compensation to improve its machining accuracy. However, there are no special precision measuring instruments and specifications for the geometric error measurement of the machine tool rotation axis. Generally, laser interferometers, ballbars, etc. are used. Indirect measurement has problems such as low measurement efficiency and measurement accuracy affected by install...

Claims

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Application Information

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IPC IPC(8): G01B7/02
CPCG01B7/02
Inventor 丁国富江磊丁国华张剑黎荣邹益胜
Owner 成都天佑创软科技有限公司
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