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A method for checking blade shape value of precision casting jet 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: 2017-10-27
WUHAN MARINE MACHINERY PLANT
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A method for checking blade shape value of precision casting jet impeller
  • A method for checking blade shape value of precision casting jet impeller
  • A method for checking blade shape value of precision casting jet 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

A method for inspecting the blade type value of a precision casting jetting impeller. The surface of the jetting impeller blade is divided into a working surface (4) and a non-working surface (5). During the inspection, the outline of a single blade is firstly inspected and screened out for casting gross error, and then select the blade with the smallest comprehensive error of the blade profile to establish the inspection benchmark, and then perform accurate inspection of each blade type value, specifically including the following steps: sample (3) check, determine the benchmark for accurate inspection, C point positioning, and inspection benchmark Machining, blade type value inspection point marking, three-coordinate tester inspection and reverse modeling and data comparison. The use of the three-coordinate tester to complete the test of the blade type value under the existing conventional test conditions is realized, the cost is low, and the equivalence between the test result and the actual result of the product 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 Patents(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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