Bilgisayar destekli parça tanıma sisteminin geliştirilmesi ve motor montajına uygulanması

Bu çalışmada, dizel motor parçalarının yüz bitişiklik ilişkileri ve nitelikleri kullanılarak tanınması ve tanınan parçaların bilgisayar destekli tasarım (BDT) ortamında montajının yapılması için bir yaklaşım geliştirilmiştir. Tanıma işleminde uzman sistem tekniği kullanılmıştır. Motor parçalarının BDT modellerinin otomatik olarak STEP dönüşümü yapılmış ve oluşturulan STEP dosyası yorumlanarak parça üzerindeki her bir yüzün komşu yüzleri ve nitelikleri çıkarılmıştır. Aynı zamanda, bir yazım editörü kullanılarak bir veri tabanı oluşturulmuştur. Veri tabanı ve parça tanıma işleminden elde edilen yüz bitişiklik ilişkileri ve nitelikleri karşılaştırılarak parçalar bilgisayar tarafından tanınmaktadır. Parça modeli, parça ismi ile veri tabanına kaydedilmekte ve modele ait yüz komşuluk ilişki matrisi ile temsil edilmektedir. Montaj aşamasında, tanınan parçaların referans yüzeyler belirlenmiş ve referans yüzeyler vasıtasıyla parçalar montaj dosyasına taşınarak BDT ortamında montajı yapılmıştır.

The developing of computer aided part recognition system and implementation into engine assembly

In this study, an approach has been developed to recognise the parts of a diesel engine using their face adjacency relations and attributes and to assembly the recognised parts in a computer aided design (CAD) environment. An expert system technique has been used in recognition procedures. CAD models of the parts of the engine are automatically translated into their STEP files and neighbouring faces and face attributes of each face on a part are extracted by evaluating of the generated STEP file. A database is also constructed using a text editor. Comparing the face adjacency relations and the attributes in the database and part recognition procedures, the parts are recognised by the computer. The part model is saved into the database with the name of the part and is represented in its face adjecency relation matrix. In the assembly stage, reference surfaces of the recognised parts are determined and they are assembled by moving into the assembly file through the reference surfaces in a CAD environment.

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