Machining online measurement method of blades of hydroturbine

A measuring method and water turbine technology, applied in the field of measurement, can solve the problems of difficult to determine the theoretical size of the processing part, difficult to determine the processing allowance, etc., and achieve the effects of reducing processing risks, reducing detection methods, and facilitating measurement

Inactive Publication Date: 2012-07-04
KOCEL GROUP +1
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  • Abstract
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Problems solved by technology

The disadvantage of this method is that it is difficult to determine the specific processing allowance correspondin...

Method used

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  • Machining online measurement method of blades of hydroturbine
  • Machining online measurement method of blades of hydroturbine

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Experimental program
Comparison scheme
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Embodiment Construction

[0020] An on-line measurement method for machining blades of a water turbine is characterized in that the method includes the following steps:

[0021] a. Tooling design: According to the specific profile of the turbine blade and the specific processing range, processing width and height of the processing machine tool, the blade is adjusted to the required posture in the computer using 3D software, and then the special tooling is designed and rigidly connected with the blade Connection, to ensure the rigidity of the processing system, the origin of the coordinates of the processing system is set to the corner of the tooling, and make it the same as the origin of the processing program;

[0022] b. Detection: After the local processing is completed, use the machine tool to inspect 3~5 points on the processing surface of the blade and record the coordinate value of each point. Import each coordinate value into the 3D model to obtain the detection point. At this time, we measure t...

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Abstract

The invention relates to a measurement method, in particular to a machining online measurement method of blades of a hydroturbine. The machining online measurement method is characterized by comprising the following steps of: (a) designing a tooling; and (b) detecting: inspecting 3-5 points on the processed surfaces of the blades by a machine tool after completing local machining, recording a coordinate value of each point, introducing each coordinate value into a 3D (three-dimensional) model to get a detection point and judging the machining allowance of each point by measuring the vertical distance between the detection point and the 3D model, wherein if the machining allowance is a positive value, insufficient machining is indicated, otherwise, excessive machining is indicated. According to the measurement method disclosed by the invention, whether the positions of the blades are changed or not in the machining process can be simply, uniquely and better monitored, the correctness of blade profile after machining can be accurately detected, and the quality can be further effectively controlled.

Description

technical field [0001] The invention relates to a measurement method, in particular to an on-line measurement method for processing blades of water turbines. Background technique [0002] The turbine blade is a complex sculpture-shaped space surface casting. It is difficult to monitor and measure in real time during the processing process, so it is difficult to ensure the processing quality of the blade. The current general practice is to measure the wall thickness of the blade and compare it with the remaining amount before processing to ensure the correctness of the processing profile. Due to the error of the detection equipment and other reasons, this method has a large measurement error, and cannot accurately reflect the processing error of the blade profile, nor can it find out whether the blade position has changed during the entire processing process. In addition, the detection process is relatively cumbersome, which is not conducive to the improvement of production ...

Claims

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Application Information

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IPC IPC(8): B23Q17/20
Inventor 柏长友杨保王绍刚马涛彭凡
Owner KOCEL GROUP
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