Accurate part machining method based on measured data feature guidance

A technology for precise processing and actual measurement of data, applied in digital control, instruments, control/regulation systems, etc., can solve problems such as error accumulation, time-consuming, labor-intensive, and inconvenience, and achieve low efficiency, time-consuming, reasonable process planning, and improved accuracy Effect

Active Publication Date: 2020-04-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

The traditional manual reprocessing technology is time-consuming and laborious, and it is easy to cause error accumulation in the process of processing, transportation, clamping, etc., which brings great inconvenience to subsequent assembly

Method used

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  • Accurate part machining method based on measured data feature guidance
  • Accurate part machining method based on measured data feature guidance
  • Accurate part machining method based on measured data feature guidance

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Embodiment Construction

[0043] In order to clarify the technical solution of the present invention, the present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0044] The present invention is based on the measured data feature-guided parts precision processing method, through the steps of obtaining the measured model point cloud data, data preprocessing, contour feature extraction boundary, ordered sampling and other steps, the ordered sampling results are mapped to the data model as a guide for numerical control The trajectory of machining to improve the accuracy of remachining parts with allowance.

[0045] In this embodiment, a part with a thin-walled structure is taken as an example, and the specific process of the processing method is as follows:

[0046] 1) Scan the reprocessed standard parts with a 3D laser scanner, establish a measured model, and obtain the 3D point cloud data of the measured model, which is recorded as the ...

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Abstract

The invention discloses an accurate part machining method based on measured data feature guidance. The method comprises the steps of acquisition of point cloud data of an actual measurement model, data preprocessing, boundary extraction of contour features, ordered sampling and the like. An ordered sampling result is mapped to a data model to serve as a track for guiding numerical control machining, so that the precision of remachining of parts with margins is improved. According to the accurate part machining method based on measured data feature guidance, the defects that in a traditional process, manual remachining of parts with allowance is low in efficiency and consumes time are effectively overcome, the machining precision and the machining efficiency are improved. And the method isreasonable in process planning, easy to implement, high in reproducibility and suitable for application and popularization.

Description

technical field [0001] The invention relates to the technical field of digital manufacturing, in particular to a precise machining method for parts guided by measured data features. Background technique [0002] In the molding stage of composite material parts, it is difficult to guarantee the processing accuracy of some parts. It is necessary to leave a machining allowance for the corresponding parts during manufacturing, and complete the final processing when the parts are assembled and positioned, that is, leave a machining allowance parts for reprocessing. The traditional manual reprocessing technology is time-consuming and laborious, and it is easy to cause error accumulation during processing, transportation, clamping, etc., which brings great inconvenience to subsequent assembly. [0003] Since the development of digital manufacturing technology, digital measurement technology has been playing a very important role. As processing and manufacturing move towards intel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/19
CPCG05B19/19G05B2219/34106
Inventor 汪俊陈红华韦正渊张沅
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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