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Blade in-situ contact type three-dimensional measurement device and method

A three-dimensional measurement and contact technology, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of in-situ measurement of blade parts, great influence of dust, low work efficiency, etc., to achieve in-situ measurement and measurement cost Low, low environmental requirements

Active Publication Date: 2018-07-13
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

The conventional three-coordinate measuring instrument has high measurement accuracy and can meet the accuracy requirements, but the equipment has poor mobility and is greatly affected by dust. The instrument needs to program and plan the stylus trajectory in advance, and programming separately for different types of blade parts is time-consuming and labor-intensive, and the work efficiency is low

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  • Blade in-situ contact type three-dimensional measurement device and method
  • Blade in-situ contact type three-dimensional measurement device and method
  • Blade in-situ contact type three-dimensional measurement device and method

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Embodiment Construction

[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0044] Referring to the accompanying drawings, a blade 55 in-situ contact three-dimensional measuring device includes a working table 1, an XY two-dimensional horizontal motion platform, a measuring mechanism 4, a rotating platform 5, a controller and a calibration rod 6, and the XY two-dimensional horizontal The motion platform includes an X-direction motion platform 2 and a Y-direction motion ...

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Abstract

The invention belongs to the technical field of blade measurement and discloses a blade in-situ contact type three-dimensional measurement device and method. The blade in-situ contact type three-dimensional measurement device comprises a working table, an X-directional motion platform, a Y-directional motion platform, a measurement mechanism and a rotating platform, wherein the X-directional motion platform is arranged on the Y-directional motion platform, and the Y-directional motion platform is arranged on the working table to form a two-dimensional motion platform; the measurement mechanismis arranged on the X-directional motion platform and moves in X and Y directions along with the two-dimensional motion platform; blades are mounted on the rotating platform and driven by the rotatingplatform to rotate. The blade in-situ contact type three-dimensional measurement method comprises maintaining constant-force contact between the measurement mechanism and the blades, reading the linear displacement of the measurement mechanism in the X and Y directions and the rotating angle theta of the blades through a grating rule and a rotary encoder, and performing coordinate transformationand bulb radius compensation to acquire the surface contour coordinates of the blades. The blade in-situ contact type three-dimensional measurement device has the advantages of being convenient to move, simple in measurement process and low in cost and can achieve precise in-situ measurement of the blades.

Description

technical field [0001] The invention belongs to the technical field of blade measurement, and more particularly relates to a blade in-situ contact type three-dimensional measurement device and method. Background technique [0002] Blades are important components of aero-engines, gas turbines and steam turbines. The surface machining accuracy not only affects the performance of the machine, but also determines the service life of the parts. During the machining process of the blade, the cutting depth is controlled solely by the theoretical machining allowance, and the machining quality of the blade surface cannot be guaranteed. In order to obtain the real machining allowance of the blade blank, it is necessary to obtain the contour model of the blade blank first. The blade part is a free-form surface part, and the size data of the blade cannot be detected by conventional measuring tools. The measurement of the blade is a difficult point in the current processing. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/245
Inventor 赵欢李昊陈茜丁汉
Owner HUAZHONG UNIV OF SCI & TECH
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