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Local datum hole positioning and drilling-oriented position error equally-dividing method

A reference hole and error technology, which is applied in the field of automatic hole making in aircraft assembly, can solve problems such as reference hole error, and achieve the effect of reducing position accuracy requirements and simple algorithm.

Active Publication Date: 2022-02-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After the detection based on the reference hole, there is another important problem that cannot be ignored. The actual reference hole has an error, even reaching more than 1mm, but the accuracy of the hole distance is often below 0.5mm

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  • Local datum hole positioning and drilling-oriented position error equally-dividing method
  • Local datum hole positioning and drilling-oriented position error equally-dividing method
  • Local datum hole positioning and drilling-oriented position error equally-dividing method

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0013] like figure 1 shown.

[0014] A position error equal division method for local reference hole positioning and manufacturing, which includes the following steps:

[0015] First, calculate the scale factor λ of the reference hole distance according to the detected positions of the two reference holes;

[0016] Let the coordinates of a point P in the original coordinate system and the target coordinate system be P E =[x 1 ,y 1 ,z 1 ] T and P P =[x 2 ,y 2 ,z 2 ] T .

[0017] Let two corresponding points P of the original coordinate system and the target coordinate system 1 ,P 2 , the scale factor λ can be obtained according to the modulus length of the corresponding point vector:

[0018]

[0019] In the formula: are the vector values ​​of two corresponding points under the original system and the target system,

[0020] Se...

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Abstract

The invention relates to a position error equally-dividing method for positioning and drilling local reference holes, the method comprising the following steps of: 1, calculating a scale factor lambda of a reference hole distance according to the detected positions of two reference holes; 2, solving a coordinate transformation matrix under an original coordinate system and a target coordinate system containing scale factors; 3, solving the hole making point position after error equipartition by using the solved scale factor and the coordinate transformation matrix. The method is simple and convenient in algorithm, does not need to manually change off-line programmed hole making point positions according to on-line detection data, and can be integrated in equipment to be automatically completed. According to the invention, the position precision requirement of the reference hole is greatly reduced.

Description

technical field [0001] The invention relates to a positional error equalization method for local reference hole positioning and drilling, which belongs to the technical field of aircraft assembly automation drilling, and specifically relates to a solution to the problem of excessive hole spacing caused by the error of the reference hole itself method. The method can be installed in various flexible track drilling systems, autonomous mobile automatic drilling systems, industrial manipulator drilling systems, etc., and solves the position error problem of local reference hole positioning. Background technique [0002] As an important part of the aircraft manufacturing process, aircraft assembly accounts for 50% to 70% of the entire aircraft manufacturing cycle, and plays a vital role in the manufacturing quality, service life and production cost of the entire aircraft. At present, in the process of aircraft assembly in my country, manual operations are mostly used, and the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00G01B21/16B64F5/60
CPCG01B21/00G01B21/16B64F5/60
Inventor 王珉田威张得礼陈文亮惠昊翀陶克梅金霞潘劲伟索玉福李奕星吕广渌吕帅强施天岚樊启豪
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS