Positioning method, device and system for three-dimensional curved surface workpiece

A technology of three-dimensional curved surfaces and workpieces, which is used in measuring devices, instruments, surveying and navigation, etc., and can solve the problems of deviation between the processing position and direction and the target processing position and direction.

Active Publication Date: 2020-01-14
XIAN MICROMACH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a positioning method, device and system for a three-dimensional curved surface workpiece, aiming to solve the problem of deviation between the actual processing position and direction and the target processing position and direction when performing positioning processing on a three-dimensional curved surface workpiece in the prior art technical problem

Method used

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  • Positioning method, device and system for three-dimensional curved surface workpiece
  • Positioning method, device and system for three-dimensional curved surface workpiece
  • Positioning method, device and system for three-dimensional curved surface workpiece

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Embodiment 1

[0029] figure 1 It shows the implementation process of the positioning method of the three-dimensional curved surface workpiece provided by the first embodiment of the present invention. For the convenience of explanation, only the parts related to the embodiment of the present invention are shown. The details are as follows, which may include step S110, step S120, step S130, step S140, step S150:

[0030] In step S110, key feature points are selected on the theoretical model of the three-dimensional curved surface workpiece, and surface patch features are intercepted in the neighborhood of the key feature points to generate grid lattices.

[0031] The embodiments of the present invention are applicable to laser processing machine tools or traditional mechanical processing machine tools for positioning and processing three-dimensional curved surface workpieces.

[0032] In the embodiment of the present invention, a positioning system for a three-dimensional curved surface wor...

Embodiment 2

[0084] Figure 5 It shows the structural diagram of the positioning device for the three-dimensional curved surface workpiece provided by the second embodiment of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown, including:

[0085] The grid lattice generation module 110 is used to select key feature points on the theoretical model of the three-dimensional curved surface workpiece, and intercept surface features in the neighborhood of the key feature points to generate a grid lattice;

[0086] A sensor coordinate acquisition module 120, configured to acquire the spatial coordinates of the measurement sensor in the machine tool coordinate system;

[0087] The measurement value determination module 130 is used to measure the key feature point by the measurement sensor, and determine the coordinates of the key feature point in the machine tool coordinate system as the measurement value;

[0088...

Embodiment 3

[0104] Figure 6 The structure of the positioning system for a three-dimensional curved surface workpiece provided by the third embodiment of the present invention is shown, and for the convenience of description, only the parts related to the embodiment of the present invention are shown.

[0105] An embodiment of the present invention provides a positioning system 4 for a three-dimensional curved surface workpiece. The positioning system 4 for a three-dimensional curved surface workpiece includes a numerical control machine tool 61 , a measurement sensor 62 , a fixture 63 and a controller 64 .

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Abstract

The invention belongs to the field of curved surface workpiece positioning, and provides a positioning method, a positioning device and a positioning system for a three-dimensional curved surface workpiece. The method comprises the steps of: intercepting patch features from the three-dimensional curved surface workpiece to generate a grid dot matrix according to theoretical parameters of key feature points; acquiring coordinates of a measurement sensor under a machine tool coordinate system; measuring the key feature points by means of the measurement sensor so as to determine coordinates of the key feature points under the machine tool coordinate system; carrying out iterative computation in the grid dot matrix according to measured values; determining a corresponding rotation matrix anda corresponding translation matrix according to a selected target grid point and the measured values; and calculating machine tool coordinates of a machining point position according to coordinates ofa point position to be machined, the rotation matrix and the translation matrix. Therefore, the finally obtained machining point is close to the actual machining position, and the positioning precision in the three-dimensional curved surface workpiece is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of laser processing, and in particular relates to a positioning method, device and system for a three-dimensional curved surface workpiece. Background technique [0002] At present, in the positioning processing of three-dimensional curved surface workpieces, such as hole making, etching, spot welding, etc., the machine tool coordinate system is mainly established by positioning the tooling. It is assumed that the machine tool coordinate system coincides with the theoretical model coordinate system, so that the machine tool coordinate system is used. Process accordingly. [0003] However, due to the difference between the real three-dimensional surface workpiece and the theoretical model, on the premise that the coordinate system of the machine tool is coincident with the coordinate system of the theoretical model, when the corresponding positioning processing is carried out in the coordinate system of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C15/00
CPCG01C15/00
Inventor 姜昱吴平梁晨涛王宁訾进锋
Owner XIAN MICROMACH TECH CO LTD
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