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Non-contact real-time displacement measuring method and device in bending deformation process of work piece

A technology of bending displacement and workpiece, applied in the field of non-contact real-time displacement measurement and device in the process of workpiece bending deformation, can solve the problems of unobtainable bending displacement change, scanning interruption, etc., to improve repeatability, reliability and accuracy Improve and promote the effect of the application

Inactive Publication Date: 2010-06-23
BEIHANG UNIV +1
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Problems solved by technology

The disadvantage of the laser scanner measurement method is that the entire process of the bending displacement change cannot be obtained due to the intermittent scanning.

Method used

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  • Non-contact real-time displacement measuring method and device in bending deformation process of work piece
  • Non-contact real-time displacement measuring method and device in bending deformation process of work piece
  • Non-contact real-time displacement measuring method and device in bending deformation process of work piece

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Embodiment Construction

[0026] figure 1 A laser bending system according to a preferred embodiment of the present invention is shown. The laser bending system shown comprises a table 1 equipped with a fixture 2 essentially consisting of two plates that can be pressed against each other in order to hold and clamp a workpiece 5 between them. The workpiece 5 to be deformed, which is a sheet metal in the present embodiment, is held by the clamp 2 like a cantilever plate. figure 1 The system also includes a laser device 3 for providing a laser beam, which is mechanically connected to a robot 4 for moving the laser device 3 . Robot 4 moves and controls laser device 3 so that laser light is irradiated on metal sheet 5 along the width direction of sheet metal ( figure 1 dashed line shown). Furthermore, the present system includes a CCD camera 7 . The lens of the camera 7 is covered with a filter 6 to prevent laser light from entering the camera 7 . In order to calculate the optical data obtained by the ...

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PUM

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Abstract

The invention relates to a non-contact real-time method for measuring the bending displacement of a work piece (5) which is deformed by a bending method, and the method comprises the following steps: the bending work piece (5) catches at least a part of geometrical images of the work piece (5) by a camera (7), a processor (8) which is electrically connected with the camera processes the images, and the processor (8) determines the bending displacement of the work piece (5). Moreover, the invention relates to a measuring system for executing the method.

Description

technical field [0001] The present invention relates to a measurement system for measuring bending displacement of a workpiece deformed by a bending method such as a laser beam, electron beam or arc beam and a non-contact, real-time method for measuring eg bending displacement. Background technique [0002] Laser bending is a highly flexible processing technology that combines laser and metal forming technologies. It is a non-contact forming process in which a laser beam is used as a forming tool to form eg sheet metal workpieces without any dies. This technology has a very wide range of applications, especially in the shipping, automotive and aerospace industries. [0003] In order to develop and apply this technology, many scholars working in Japan, Poland, the United States, Germany and China have done theoretical and experimental research work since 1980. However, empirical investigations have mainly focused on measuring the final bending angle of sheet metal. Because...

Claims

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Application Information

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IPC IPC(8): G01B11/02G01B11/16
CPCG01B11/26G01B11/24
Inventor 王秀凤杨清凤黄琳琳桂天宜郭晓丽蔡友贵J·西尔瓦努斯E·布兰德尔吕坚
Owner BEIHANG UNIV
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