Blade type value checking method for precision casting type spray pushing impeller

An impeller blade and precision casting technology, which is applied in the field of inspection, can solve the problems of high cost and incomplete corresponding final processing results, and achieve the effect of low cost and guaranteed equivalence

Active Publication Date: 2015-03-25
WUHAN MARINE MACHINERY PLANT
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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 precision casting jet impeller blade type value inspection method for the existing precision casting jet impeller with high cost, and the scanning results often cannot completely correspond to the final processing results. value test method

Method used

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  • Blade type value checking method for precision casting type spray pushing impeller
  • Blade type value checking method for precision casting type spray pushing impeller
  • Blade type value checking method for precision casting type spray pushing impeller

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Because the blade type value of the spray impeller determines the hydraulic performance of the spray impeller and also determines the performance of the entire spray product. Therefore, castings that do not meet the requirements can be eliminated through the type value inspection to ensure product quality.

[0027] Since all the blades of the precision casting impeller are investment casting, it is no longer possible to find the inspection benchmark by machining the blades, and the position of the blades cannot be guaranteed based on the hub; therefore, in order to ensure the inspection results and follow-up Consistency of processing benchmarks, it is necessary to find a method to test the blade type value of the precision casting impeller, so it is necessary to find a reference point on the blade of the impeller and establish a...

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Abstract

The invention discloses a blade type value checking method for a precision casting type spray pushing impeller. The blade surface of the spray pushing impeller is divided into a working surface (4) and a non-working surface (5). The checking method comprises the following steps in sequence: during checking, the profile of a single blade is roughly checked, gross casting errors are screened, a check reference is built by selecting blades with minimum comprehensive blade profile errors, and each blade type value is accurately checked. The method specifically comprises the steps of stop detection of a sample plate (3), determination of an accurate check reference, C point positioning, processing of the check reference, marking of check points of the blade type values, checking through a three-dimensional check meter, reverse modeli and data comparison. The blade type values can be checked by using the three-dimensional check meter under conventional check conditions, the cost is lower, and the equivalence of a check result and an actual product result is guaranteed.

Description

technical field [0001] The invention relates to an inspection method, in particular to an inspection method for the blade type value of a precision casting spray impeller. Background technique [0002] As the core part of the water jet propulsion device, the jet impeller is responsible for converting the mechanical energy transmitted by the shaft system into the thrust that propels the ship forward. The hydraulic performance of the jet impeller and the manufacturing accuracy directly determine the performance of the water jet propulsion device. level. [0003] The jetting impeller is generally cast as a whole, and then machined in place after returning to the factory. However, the spray impellers used in small and medium power applications are mostly made of precision casting. Precision casting is also called investment casting. The control accuracy requirements of the blade type value. The blade shape of the precision casting spray impeller is guaranteed by casting, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G01B21/20
Inventor 程涛程哲韩海辉李健吴少龙杜文国胡彬彬
Owner WUHAN MARINE MACHINERY PLANT
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