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Non-contact online detection method for chemical milling cutting of large parts

A detection method and large-scale parts technology, applied in the field of laser measurement, can solve the problems of large-scale part boundary detection, low efficiency, and inability to detect parts in real time, and achieve the effect of convenient pose adjustment and high measurement efficiency

Inactive Publication Date: 2017-06-13
DALIAN UNIV OF TECH
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Problems solved by technology

This method has a simple device structure and can realize automatic detection of thin slice parts with complex shapes. However, since it is installed on a three-coordinate measuring instrument, it cannot detect the boundaries of large-scale parts of the aircraft, and needs to plan the path. Real-time detection of parts being processed

Method used

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  • Non-contact online detection method for chemical milling cutting of large parts
  • Non-contact online detection method for chemical milling cutting of large parts
  • Non-contact online detection method for chemical milling cutting of large parts

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Embodiment Construction

[0037] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings and technical solutions.

[0038] In this embodiment, the object to be tested is an aluminum sample plate with a flatness of 600*800mm and a flatness of 0.01mm. It has the border left after the milling cut. The laser tracker model is Leica-AT960LR, the T-Mac model is TMC30-B, and two 3-D cameras and a 50mw blue laser are used for detection experiments.

[0039] figure 1 This is the flow chart of the online detection method. The detection method is to hang the binocular vision system on the beam of the machine tool through the horizontal and vertical guide rails, and realize the cutting quality detection of the milling boundary of large aerospace parts by adjusting the pose of the binocular vision system. The specific steps of the method are as follows:

[0040] The first step is to integrate the binocular vision system on the beam of the mac...

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Abstract

The invention discloses a non-contact online detection method for chemical milling cutting of large parts, belongs to the technical field of laser measurement, and relates to a non-contact online detection method for measuring the milling cutting quality of large parts. The detection method comprises the steps: integrating a binocular vision system onto a beam of a machine tool, and measuring local data of a boundary of a large part by adjusting the pose of the binocular vision system; calibrating internal and external parameters of a binocular camera and a T-Mac pose, acquiring measurement data, performing part boundary structure feature point extraction on the data and thus obtaining local three-dimensional information of the part boundary. The local measurement data is unified to a global coordinate system so as to achieve the overall three-dimensional information measurement and reconstruction. The detection method is high in measurement efficiency and convenient in pose adjustment, an original structure of the machine tool is not destroyed during installation, no contact with parts occurs, and the precision is high. The non-contact online detection method has the advantages of real-time measurement, thereby meeting the requirements of milling cutting quality inspection of large parts.

Description

technical field [0001] The invention belongs to the technical field of laser measurement, and relates to a non-contact on-line detection method for measuring the quality of milling and cutting of large parts. Background technique [0002] In the aircraft manufacturing process, it is necessary to chemically mill parts such as the fuselage, and then trim the chemically milled parts to make them meet the specified technical and precision requirements and meet the assembly conditions. After the parts are chemically milled, the parts are placed on the edge trimming machine to cut the edge parts according to the design requirements. The quality of the edges of the parts directly affects the dimensions of the parts, thus affecting the assembly quality of the aircraft, so the accuracy of the cutting position of the parts Very important to the quality of the aircraft. Through the analysis of the measurement data of the contour cutting position, the deviation between the actual proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88G01B11/24
CPCG01B11/24G01N21/8851G01N2021/8887G01N2201/06113
Inventor 刘巍张致远兰志广张洋赵海洋叶帆马建伟贾振元
Owner DALIAN UNIV OF TECH
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