Method for carrying out diameter two-point six-transposition measurement on roundness error of large-scale shaft part and kinematic error of machine tool spindle

A technology for shaft parts and roundness error, which is used in the field of measuring the roundness error of large shaft parts and the motion error of the machine tool spindle at two points and six positions on the diameter, and can solve the problems of error separation and so on.

Inactive Publication Date: 2012-06-20
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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AI Technical Summary

Problems solved by technology

Now these traditional measuring devices for large shaft parts do not have the function of separating the machine tool system error from the roundness error of large shaft parts

Method used

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  • Method for carrying out diameter two-point six-transposition measurement on roundness error of large-scale shaft part and kinematic error of machine tool spindle
  • Method for carrying out diameter two-point six-transposition measurement on roundness error of large-scale shaft part and kinematic error of machine tool spindle
  • Method for carrying out diameter two-point six-transposition measurement on roundness error of large-scale shaft part and kinematic error of machine tool spindle

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Embodiment Construction

[0084] The specific implementation of the present invention is described in detail as follows in conjunction with accompanying drawing:

[0085] Such as figure 1 As shown, the ball screw pairs 5 and 2 are driven by the servo motors 3 and 4, so that the two sensor measuring heads 7 and 10 installed on the measuring arms 6 and 11 are located on the center line of the large shaft part 8. During the measurement process, the measurement of large shaft parts is measured three times with reference to the starting point A, and the two sensors obtain the measurement series values ​​of six positions in total. At the same time, the rotation of large shaft parts must be accurately graduated. The rotation angle of large shaft parts relative to the measurement reference starting point A is shown in Table 1, and the speed of large shaft parts is shown in Table 2.

[0086] Symbol Description:

[0087] N: The weekly sampling points of the measurement sensor;

[0088] the y k (n): the outpu...

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Abstract

The invention relates to a method for carrying out diameter two-point six-transposition measurement on a roundness error of a large-scale shaft part and a kinematic error of a machine tool spindle. According to the method, a time domain signal acquired in the measuring process of six different transpositions according to two displacement sensors which are diametrically arranged is transformed into a frequency domain to be analyzed, and the roundness error of the large-scale shaft part which takes the eccentric rotating motion is separated from the kinematic error of the spindle by a machine, so that the on-line measurement of the roundness error of the large-scale shaft part and the motion of the spindle is realized and the measurement accuracy is improved.

Description

technical field [0001] The invention relates to a method for measuring the roundness error of large shaft parts and the motion error of the main shaft of a machine tool with two points and six positions on the diameter. It moves relative to the surface of the large shaft part in six different measurement positions according to the two displacement sensors set on the opposite diameter through the three-time indexing of the large shaft part to obtain redundant information on the surface of a certain section of the large shaft part, and Establish a six-bit roundness error separation equation, transform the time-domain signal collected from redundant information into the frequency domain for analysis, and separate the roundness error of large shaft parts that perform eccentric rotation and the motion error of the spindle on the machine , to realize the on-machine measurement of the roundness error and spindle motion error of large shaft parts, which can improve the measurement acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/20G01B21/00B23Q17/00
Inventor 闫利文
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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