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

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.

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. ...

AI Technical Summary

Problems solved by technology

Therefore, it is often due to errors in measurement and calculation that a qualified product in actual assembly is detected as an unqualified product and is treated as an unqualified product, which brings huge losses to the manufacturer.

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