Method for measuring spatial rotating surface by taking coordinate of ball center of steel pin as target point

A technology of space rotating curved surface and target point, applied in the direction of measuring devices, instruments, etc., can solve problems such as wrong measurement results, no application or report found, difficulty in measuring spatial rotating curved surface, etc., and achieve high accuracy and high measurement efficiency Effect

Active Publication Date: 2014-09-10
HONGTA TOBACCO GRP
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Problems solved by technology

[0004] In the three-coordinate measurement technology, if the radius compensation of the stylus is activated, the measurement theory requires the stylus to approach the measurement along the normal vector of the measured point, otherwise measurement errors or wrong measurement results will occur
[0005] To sum up, the measurement of spatial rotating surfaces is difficult in the field of three-coordinate measurement, and it is called one of the key technologies in geometric quantity testing. As a commercial software for three-coordinate measurement, no relevant application has been found in China at present. or report

Method used

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  • Method for measuring spatial rotating surface by taking coordinate of ball center of steel pin as target point
  • Method for measuring spatial rotating surface by taking coordinate of ball center of steel pin as target point
  • Method for measuring spatial rotating surface by taking coordinate of ball center of steel pin as target point

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Experimental program
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Effect test

Embodiment 1

[0204] Embodiment 1: Measurement of rotating surface of space cam

[0205] Program Applied Tobacco Industry. In the smoke machine equipment, the spatial rotating surface is widely used, and it is mostly seen in the wrapping machine GDX2000 and GDX1, such as part numbers: 0X9674, 0X9196, 0X7400, 0X7531, 2XKDA4, OX6126 and OAS947, etc., such as Figure 7 It is a double cylindrical cam, Figure 8 The contour curves obtained for its measurement are all unprocessed original curves. There are 9 stylus trajectory curves and 3 contour curves on each surface, each of which has a data file, which is generated with 48 data files. There are approximately 13,200 measurement points. In cigarette companies, use Figure 8 , can be directly imported into the CAD / CAM system to implement the measurement reverse engineering of the accessory and the quality control in the manufacturing; in the smoke machine company, in addition to the metrological verification, it can also implement the rever...

Embodiment 2

[0206] Embodiment 2: blade surface inspection method:

[0207] The blade surface is an important curved surface, and the manufacturing accuracy of the important blade surface is very high. If there is a design drawing, it can be inspected according to the technical requirements; if there is no drawing, the blade can be reversely designed. Figure 9 It is a schematic diagram of the method of measuring the blade surface with this program. If the measurement coordinate system is established at the rotation center of the blade surface, the polar angle value A1 ( ) and A2( ), determine the R1 value, calculate the d value or θ according to the formula (1-3), and use the vector V (0, 0, -1), then you can make precise measurements on the blade surface.

[0208] For example, if the leaf surface error of R2=300mm is checked, if d=1mm is selected, then R1=299.333mm, R3=300.334mm, θ=0.1101433°. If the starting point polar angle A1=45°, the end point polar angle A2=85°, then there w...

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Abstract

The invention discloses a method for measuring spatial rotating surface by taking the coordinate of a ball center of a steel pin as a target point. The method comprises the following steps: building a coordinate system according to a spatial rotating surface; determining the measuring range of the spatial rotating surface, and selecting a plurality of polar radii Rs in the range; aiming at each polar radius R, building a plurality of exiguous triangles by adopting an identical graduation method, calculating the normal vector of the plane determined by the exiguous triangles; generating data files conforming to reading format of professional software; and analyzing the numeric area of the height d of the regular triangle through master ball experiment. By adopting the method in the invention, the spatial rotating surface can be measured and the method has high measuring precision.

Description

technical field [0001] The invention relates to the field of automatic measurement of curved surfaces in space, in particular to a high-precision measurement method for curved surfaces of rotation in space. The present invention is applicable to the measurement and reverse engineering of space rotating curved surfaces in parts of tobacco machinery such as space cams and blades; it is also applicable to the measurement and reverse engineering of impellers and blade contour surfaces in the fields of aerospace, automobile manufacturing and machinery manufacturing in my country , including research in quantitative science, etc. Background technique [0002] It is difficult to complete the precise measurement of the spatial surface contour with the trigger probe on the three-coordinate measuring machine. The manual measurement mode must be designed, and the measurement program must be designed. line for compensation measurement. [0003] In real production and life, spatial rota...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/20
Inventor 李存华
Owner HONGTA TOBACCO GRP
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