Casting three-dimensional feature extraction and similarity measurement method in combination with process parameters

Abstract

The invention belongs to the field of computer graphics and statistics, and particularly discloses a casting three-dimensional feature extraction and similarity measurement method in combination withprocess parameters. The casting three-dimensional feature extraction and similarity measurement method comprises the following steps: S1, performing preliminary matching on a to-be-matched casting model and models in a model library so as to select a plurality of models from the model library as preliminary matching models; S2, obtaining the overall modulus, the average wall thickness and the maximum wall thickness of each preliminary matching model and the to-be-matched casting model, and calculating the overall modulus distance value, the average wall thickness distance value and the maximumwall thickness distance value of each preliminary matching model and the to-be-matched casting model respectively; and S3, calculating a weighted distance value between each preliminary matching model and the to-be-matched casting model, and sorting the preliminary matching models again, thereby determining a final matching model. The casting three-dimensional feature extraction and similarity measurement method completes similarity measurement of the casting model in combination with casting process parameters, overcomes the defects that an existing matching method is insensitive to model scale changes and individual models cannot be distinguished, and is good at the matching effect.

Description

technical field [0001] The invention belongs to the fields of computer graphics and statistics, and more specifically relates to a casting three-dimensional feature extraction and similarity measurement method combined with process parameters. Background technique [0002] Foundry process design is the core technology of foundry enterprises, and the development of foundry enterprises is inseparable from the improvement of casting process design level and efficiency. In general, foundry technicians use design manuals to determine the final process of new products through manual experience and "trial and error method". This method of relying on designers to re-design products has a lot of repetitive work. For foundry companies in the front line of production practice, the company's database has a large number of professional materials such as design materials, historical processes, and 3D casting models, which is a wealth of historical experience and achievements. However, wh...

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a casting three-dimensional feature extraction and similarity measurement method combined with process parameters, the purpose of which is to perform preliminary matching between the casting model and the model in the model library to obtain a preliminary matching model, and then combine the weighted distance values ​​calculated by the three casting parameters of overall modulus, average wall thickness and maximum wall thickness to sort the preliminary matching model again, and select the final matching model, which solves the change of model scale by the existing matching method Defects that are insensitive and cannot be distinguished by individual models, and the matching effect is good

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