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Method for precisely measuring diameter of large-radius small-arc molded surface by using formula method

A large-radius, arc-shaped technology, applied in the field of arc diameter measurement, to achieve the effect of improving measurement efficiency, avoiding error amplification, and widely promoting significance

Pending Publication Date: 2022-04-15
XIAN AERO ENGINE CONTROLS
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Problems solved by technology

[0003] Aiming at the technical problems existing in the existing large-radius arc diameter measurement, the present invention provides a method for precisely measuring the diameter of large-radius and small-arc profiles using the formula method, which has high measurement precision, small error, and improves measurement efficiency

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  • Method for precisely measuring diameter of large-radius small-arc molded surface by using formula method
  • Method for precisely measuring diameter of large-radius small-arc molded surface by using formula method
  • Method for precisely measuring diameter of large-radius small-arc molded surface by using formula method

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Embodiment 1

[0032] see figure 1 and figure 2 , in this embodiment, the measurement method is specifically:

[0033] Ⅰ. Establish a coordinate system based on the projection surface of the arc, the two ends of the arc (point 1 and point 2) and the midpoint of the arc;

[0034] Ⅱ. After the coordinate system is established, set the method of collecting points so that the probe touches the surface along the direction of the theoretical vector to obtain point 1 and point 2. Fine-tune the origin position of the coordinate system in the X direction and record the coordinate position (X 1 , Y 1 ), (X 2 , Y 2 ), make|X 1 |=|X 2 |, |Y 1 |=|Y 2 |;

[0035]In this embodiment, point 1, point 2 and their midpoint are used to construct the original coordinate system, and the theoretical lower difference radius is the new zero point through the circular arc vertex offset theory, and the coordinates of point 1 (X 1 , Y 1 ) and point 2 coordinates (X 2 , Y 2 ), we know that |X 1 |=|X 2 |, ...

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Abstract

The invention belongs to the technical field of arc diameter measurement, and relates to a method for precisely measuring the diameter of a large-radius small arc molded surface by using a formula method, which comprises the following steps of: 1) dividing two end points of any section of arc on the large-radius small arc molded surface into a point 1 and a point 2, and establishing an original coordinate system by taking the point 1, the point 2 and the midpoint of the arc, a point 1 coordinate (X1, Y1) and a point 2 coordinate (X2, Y2) are obtained by using the arc vertex offset theoretical lower difference radius as a new zero point; x1 is equal to X2, and Y1 is equal to Y2; 2) setting the true value of the arc diameter as RZ, the theoretical upper difference of the offset passing through the vertex as RU and the lower difference as RD; judging whether the measured value of the arc diameter is within a tolerance zone; 3) setting a diameter increment, obtaining an R calculation result sequence group, and calculating a radius difference value R; and 4) selecting the array with the minimum radius difference value R, and calculating an average value, namely the arc diameter. The method is high in measurement precision and small in error, and the measurement efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of arc diameter measurement, and relates to a method for precisely measuring the diameter of a large-radius small arc profile by using a formula method. Background technique [0002] At present, the general methods for measuring the diameter of large-radius arcs mainly include light gap method (limit gauge method), bow height and chord length method, and equal-proportion sample comparison method. Although these methods can realize the measurement of large-radius arc diameter , but each method has its own disadvantages and defects that cannot be solved in the application: (1) The light gap method (limit gauge method) is to observe the gap between the part and the model with the naked eye, resulting in a large error, which is obvious for the measurement of precision arcs. Not applicable; (2) The bow height and chord length method is to calculate the diameter of the arc by measuring the bow height and chord len...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/10G06F17/10
Inventor 魏鹏亮王曦郭朗刘猛张多石丽娜
Owner XIAN AERO ENGINE CONTROLS
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