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Honeycomb core surface shape measurement data burr removal method

A technology for measuring data and burr removal, which is applied in measuring devices, image data processing, electrical digital data processing, etc. It can solve the problems of not reflecting the height of the honeycomb core surface and affecting the measurement accuracy of the honeycomb core, etc.

Active Publication Date: 2018-03-20
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the height of the burr does not reflect the real surface height of the honeycomb core, and the existence of burrs will affect the surface shape measurement accuracy of the honeycomb core

Method used

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  • Honeycomb core surface shape measurement data burr removal method
  • Honeycomb core surface shape measurement data burr removal method
  • Honeycomb core surface shape measurement data burr removal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] 1. Obtain the three-dimensional surface data of the honeycomb core surface

[0126] The laser micro-displacement sensor used in this embodiment is an ultra-high-speed profile measuring instrument (LJ-V7060) from Keyence Corporation. The measuring instrument adopts blue semiconductor laser, which can realize stable and ultra-high-speed measurement, the sampling interval can reach 16μs, the repeated measurement accuracy in the Z-axis direction can reach 0.4μm, the measurement contour data interval is 20μm, and the measured laser line length is 15mm. During the measurement, the probe of the profile measuring instrument is installed on the three-axis CNC machine tool, the honeycomb core sample is fixed on the machine table, and the movement of the probe of the profile measuring instrument is controlled by the machine tool to scan the surface of the honeycomb core. When scanning the honeycomb core, scan along the L direction of the honeycomb core, and the obtained data point...

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Abstract

The present invention discloses a honeycomb core surface shape measurement data burr removal method. The method comprises the following steps of: obtaining three-dimensional surface shape data of a honeycomb core surface; arranging mobile windows in an integrated honeycomb measurement data xOy plane, only processing data covered by the mobile windows each time; establishing a plane image of the honeycomb core, and performing identification of apexes of the honeycomb core; performing image reduction for a certain proportion to identify the apexes; determining a threshold of a corner detection algorithm according to the measurement data; performing analysis of the identified apexes one by one, and determining honeycomb edges taking the apexes as end points; establishing search windows for analysis corner points; determining types of the analysis corner points; determining target corner points of the analysis corner points; establishing rectangular regions for the honeycomb edges; performing plane burr removal in each honeycomb edge measurement data; and performing space burr removal in each honeycomb edge measurement data.

Description

technical field [0001] The invention relates to a method for removing burrs from honeycomb core surface shape measurement data. Background technique [0002] As an excellent high-strength and ultra-light structure, honeycomb core is widely used in aviation, aerospace, ships and high-speed trains and other fields. The honeycomb core is a lightweight core material with a sandwich structure. The upper and lower surfaces are processed by numerical control to form a specific curved surface, and the upper and lower layers of thin plates with opposite shapes are glued together to form a honeycomb core sandwich structure. The processing quality and processing accuracy of the curved surface of the honeycomb core determine the reliability of its bonding with the upper and lower sheets, which in turn affects the performance of the entire honeycomb sandwich structure. Therefore, before bonding after processing, the processing accuracy of the complex curved surface of the honeycomb core...

Claims

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Application Information

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IPC IPC(8): G01B11/24G06T7/13G06F17/50
CPCG01B11/24G06F30/20G06T7/13G06T2207/20164
Inventor 康仁科董志刚秦炎朱祥龙贾振元司立坤杨洁
Owner DALIAN UNIV OF TECH
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