Three-coordinate measuring method for circumferential uniformly-distributed hole true position error

A technology of three-coordinate measurement and hole position degree, applied in the field of measurement, can solve problems such as loss of manufacturers, measurement and calculation errors, and achieve the effect of improving production efficiency

CN101520296AInactive Publication Date: 2009-09-02AVIC HUIYANG AVIATION PROPELLER
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-09-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a three-coordinate measuring method for circumferential uniformly-distributed hole true position error, which comprises the following steps: (1) determining a theoretical coordinate in the center of a circle of a measured hole by calculation; (2) taking the theoretical coordinate in the center of the circle of the measured hole as a target point, and measuring the actual coordinate of the center of the circle of the measured hole; (3) calculating the circumferential relative error and the radial error of the center of the circle of the measured hole; and (4) calculating the true position error according to the circumferential relative error and the radial error or the circumferential absolute error and the radial error, finding out the maximum true position error, and judging whether the maximum true position error exceeds the set error. The three-coordinate measuring method can ensure that a three-coordinate measuring machine realizes automatic measurement and automatic calculation, can accurately measure the benchmark of a given initial datum hole and the benchmark of a non-given initial datum hole, has high universality and simple calculation, and avoids the occurrence that the error caused by the measurement and the calculation makes qualified products in the actual assembly detected as unqualified products so as to bring huge loss to manufactures.
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Description

1. Technical field:

[0001] The invention belongs to the technical field of measurement, and relates to a three-coordinate measurement method for the position error of uniformly distributed holes on the same circumference. 2. Background technology:

[0002] It is a relatively big problem to detect the position error of the uniformly distributed holes on the same circumference on the three-coordinate measuring machine in order to determine whether the product is a qualified product. In order to meet the detection requirements of the uniformly distributed holes in the processing process, it is necessary to determine a A method and program for detecting positional errors of uniformly distributed holes on a three-coordinate measuring machine. We know that the position degree refers to the maximum distance between the actual position of a point, line or surface and its theoretical position, and the theoretical position is given by the drawing, which is relative to the reference. ...

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing:

[0026] Such as figure 1 , figure 2 and image 3 As shown, the three-coordinate measuring method of the uniformly distributed hole position error of the same circumference of the present invention is realized by programming, and the program is stored in the central computer of the three-coordinate measuring machine, and the operation process of the three-coordinate measuring machine Carry out according to the step of the inventive method:

[0027] (1) Determine the theoretical coordinates of the center of the measured hole by calculation

[0028] Input the known parameters given in the drawing, the theoretical center of the measured hole A, the diameter of the distribution circle D, the measured hole diameter d, the measured depth Z, the number of measured holes N, the starting angle β and the division δ into the three-coordinate measuring machine central computer, such...