An analysis of the meshing was made as an intersection of teeth in subsequent angle positions of gears. The following stage of the designing process was an analysis of individual gear parts’ cooperation. Subsequently the parts were put together (fig. Then 3D-CAD models of the gear parts were created on the basis of the calculations. The calculations were made in Mathcad program and were founded on a methodology applied in calculating this type of gear. PLANETARY GEAR MODELS - 3D-CAD AND 3D-RP As a result of an analysis of constructional solutions of aeronautical gear we chose an exemplary model of planetary gear with a transmission ratio i=12. This kind of tests makes it possible to verify the calculations’ results and the created 3D-CAD models. Then one can create, using Rapid Prototyping, testing models which will undergo stand tests. This kind of models can undergo kinematic analysis and an analysis of cooperation of meshings in CDA/CAE environment. Implementing gear into a driving unit must be preceded by a process of calculations and three-dimensional 3D-CAD models must be created on the basis of the calculations. All these factors cause huge popularity of this kind of gear in aeronautical constructions. KEYWORDS: CAD, Rapid Prototyping, FDM, aeronautical planetary gear demonstrator INTRODUCTION Epicyclic gears have numerous advantages and above all the possibility of getting big transmission ratio in spite of quite small size and generally greater efficiency than other gears. For making the physical prototype a Fused Deposition Modeling (FDM) method of Rapid Prototyping was applied. The paper presents the process of making the demonstrator of planetary gear applying 3D-CAD modeling and Rapid Prototyping. The demonstrator allows for analysis of constructional solutions of the gear based on physical model and for doing introductory stand tests. The accuracy of making physical prototype depends a lot on the accuracy of 3D-CAD/3D-RP model made by means of processing the numerical data. The following stage of making the prototype of the gear is preparing numerical data necessary for making the demonstrator by means of rapid prototyping method. If 3D-CAD models are made correctly, it is possible to record the geometrical data in an appropriate format of numerical data. A detailed analysis of cooperation of gear wheels’ elements allows for early detection of construction mistakes of models and for deleting the mistakes. 3D-CAD systems are often equipped with a module for analyzing geometrical parameters and cooperation of its individual elements e.g. After carrying out the gear calculations it is possible to create 3D-CAD models of wheels and other elements of the gear. First stage of designing gear is always defining basic parameters of the gear work (among others: transmission ratio, rotational speed, power) determined by the gear destination. Contemporary methods of designing gear make use of computer aided designing systems (CAD), computer aided engineering (CAE) and computer aided manufacturing (CAM) including also rapid prototyping (RP). HETMANSKA 60, RZESZÓW, POLAND ABSTRACT: The paper presents the use of advanced integrated CAD and RP systems for the demonstrator of aeronautical planetary gear manufacturing. POZNAN UNIVERSITY OF TECHNOLOGY, POZNAN, POLAND 8. POWSTANCOW WARSZAWY 8, 35-959 RZESZOW, POLAND 7. Anna DOBROWOLSKA ADVANCED INTEGRATED CAD/RP SYSTEMS IN MANUFACTURING PROCESS OF PLANETARY GEAR DEMONSTRATOR 1-6.
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