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A Method of Reverse Modeling of Aircraft Parts Based on Die Lines of Sections

A technology of tangential die line and reverse modeling, which is applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve the effect of small workload, beneficial to improve design, and avoid image correction process

Active Publication Date: 2016-06-01
XIAN AIRCRAFT BRANCH OF XIAN AIRCRAFT INT
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Problems solved by technology

[0007] In order to overcome the defects of existing reverse modeling methods, the present invention starts from the objective requirements of analog aircraft parts improvement design and digital manufacturing, and proposes a reverse modeling method of aircraft parts based on tangent die lines, which can accurately establish Solid digital model of aircraft parts with production coordination relationship

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  • A Method of Reverse Modeling of Aircraft Parts Based on Die Lines of Sections
  • A Method of Reverse Modeling of Aircraft Parts Based on Die Lines of Sections
  • A Method of Reverse Modeling of Aircraft Parts Based on Die Lines of Sections

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Embodiment Construction

[0036] In order to realize the beneficial effects of the present invention, ensure that the established part entity digital model conforms to the existing production coordination relationship, and avoid the scrapping of existing tooling, the following principles should be followed in the process of implementing the present invention:

[0037] (1) The original definition remains unchanged. The reverse modeling process should fully respect the original design concepts and schemes, and should not destroy the boundary lines specified in the original aircraft part theory diagram, and should not destroy the original definition types of curves and surfaces.

[0038](2) The principle of unchanged coordination relationship. The established physical digital model of the part should conform to the existing production coordination relationship, and the shape of the part should be consistent with the relevant manufacturing basis and assembly state.

[0039] (3) The principle that the mode...

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Abstract

The invention provides an airplane part reverse modeling method based on a tangent plane mould line according to the analog quantity airplane part improved design and the objective requirement of digitized manufacturing. An airplane part solid digifax conforming to the existing production coordinating relation can be more accurately built, a two-dimensional grating image is formed through scanning a tangent plane mould line drawing board of a part by a flat plate type scanning device, then distortion correction, vectorization and fitting fairing are carried out on the two-dimensional grating image by means of orthogonal grid lines, and finally, the solid modeling is carried out on the airplane part by fitting the tangent plane mould line.

Description

technical field [0001] The invention belongs to the field of reverse engineering, and relates to a method for reverse modeling of aircraft parts, in particular to a method for reverse modeling of aircraft parts based on tangential die lines. Background technique [0002] Airplanes have aerodynamically smooth geometric shapes, and a large number of their parts have complex surfaces related to aerodynamic shapes. Therefore, a technology different from the general machinery manufacturing industry is widely used in aircraft manufacturing - mold line template technology to ensure that various process equipment and parts manufactured are coordinated with each other. Among them, the mold line is based on the aircraft design drawings and process requirements, and is accurately drawn on the drawing board at a ratio of 1:1, indicating the theoretical shape and structural axis of the aircraft parts. Die line is the original basis of size transmission in the process of aircraft manufac...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 彭艳敏陈金平党建卫韩强儒杨亮
Owner XIAN AIRCRAFT BRANCH OF XIAN AIRCRAFT INT
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