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In this study, relations between cutting force components and cutting parameters have been investigated as experimental and statistically during gear hobbing process. Gears are machined using TiN coated and uncoated hobs, Ç 8620 material in machining test. Additionally, ANOVA (Analysis of variance) tests of experimental results were carried out using MINITAB R14 software. With respect to the experimental results force component of Fz at direction of feed rate shown that more sensitive to variation of cutting parameters. Cutting forces on experiments performed by coated hob average ratio of % 59 lower than uncoated hobs. [ABSTRACT FROM AUTHOR]

Although there are a lot of methods for making gear, hobbing is the most common method. In this method, the evaluations of optimum cutting conditions, cost and machining time will be able to be done by interpreting the relations between cutting forces and cutting parameters. In this study, an experimental setup was designed and produced to measure cutting forces occurred during gear hobbing process. The components used in this design were: A KISTLER 9272A four component (Fx, Fy, Fz, Mz) dynamometer for force measurement, a data acquisition card (KISTLER PCIM DAS 1602/16), a multi-channel amplifier and Dynoware package for processing of data and making graphs. Experimental setup was made by taking into consideration circumstances at real cutting conditions and it was shown that cutting forces could be measured in hobbing tests. [ABSTRACT FROM AUTHOR]

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. [ABSTRACT FROM AUTHOR]