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Generation method of blade cutter tracks of francis turbine

A water turbine and mixed-flow technology, which is applied to computer components, character and pattern recognition, instruments, etc., can solve the problems of large volume, high cost, and low processing efficiency

Active Publication Date: 2018-11-23
KUNMING UNIV OF SCI & TECH
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  • Summary
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  • Description
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Problems solved by technology

Due to the complex surface characteristics and large volume of Francis turbine blades, even the current multi-axis linkage CNC machining technology still needs to use trial machining to verify and modify the machining program, resulting in low machining efficiency and high cost

Method used

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  • Generation method of blade cutter tracks of francis turbine
  • Generation method of blade cutter tracks of francis turbine
  • Generation method of blade cutter tracks of francis turbine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: as Figure 1-Figure 20 As shown, a Francis turbine blade tool track generation method, the specific steps of the method are as follows:

[0037] Step S1: Extract the surface feature information of the Francis turbine blade model to be processed, and perform step S2-1; the surface feature information specifically includes the front, back, belt-shaped turning surface connected to the upper crown, and belt-shaped turning surface connected to the lower crown 1. A characteristic surface composed of point features, line features, and boundary feature information of the six characteristic surfaces of the water inlet surface and the water outlet surface, the curvature radii of the six characteristic surfaces and the corresponding curvature radius contours;

[0038] Step S2-1: Use image recognition technology to combine the characteristic surface formed by the point features, line features, and surface feature information of the characteristic surface of the Franci...

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Abstract

The invention relates to a generation method of blade cutter rail of francis turbine, which belongs to the field of multi-axis milling processing of complex curved surfaces. By constructing a multi-axis milling feature library of Francis turbine blade, matching the model of the blade to be processed with the feature library, and updating the feature library according to the matching results, the generation method of blade cutter tracks of francis turbine provides a new idea and basis for generating tool path based on surface features of the blade model to be machined.

Description

technical field [0001] The invention relates to a method for generating a blade track of a Francis water turbine, which belongs to the field of multi-axis milling of complex curved surfaces. Background technique [0002] The water turbine is the prime mover of hydroelectric power generation, and the blade is the key component of the water turbine, and its manufacturing precision has a direct impact on the hydraulic performance such as the efficiency of the unit. The traditional manufacturing process method not only has a long manufacturing cycle, but also has low precision and surface quality of the processed blades. Due to the complex surface characteristics and large volume of Francis turbine blades, even the current multi-axis linkage CNC machining technology still needs to use trial machining to verify and modify the machining program, resulting in low machining efficiency and high cost. Therefore, how to process Francis turbine blades with high efficiency and high qual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06V10/751G06F18/211G06F18/253
Inventor 阴艳超陈富钊张立童陆宏彪陈志成牛红伟
Owner KUNMING UNIV OF SCI & TECH
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