Keywords: machine design, heating ventilation and air-conditioning duct systems, computer aided design, software tools, simulation, finite element analysis.

Feasibility of production and market placement is very important and used to be undertaken as the first phase in the design process of every machine or system. This is analysed in the production of ducts for heating, ventilation and air-conditioning (HVAC) systems in Serbia and neighbouring countries. Following the conclusion that there is a techno-economical justification for starting domestic production, different technical solutions for this machine were subjected to comparative analysis based on evaluation of technical and economic indicators in accordance with the recommendations of the VDI 2225 standard [1]. The selected optimal HVAC duct production line is presented as the model device composed by the CATIA V5 software tool. The proposed HVAC duct production line consists solely of domestic components and technologies, where the driving unit and transmission system have a significant place.

The computer aided design of the machine line that represents a very complex system used to be conducted separately for several subassemblies that have different functions and specific applications. Probably the crucial subassemblies of this system are the driving and transmission units. After detailed analyses of possible solutions for driving and transmission possibilities, the solution using an electric power motor with chain and gear transmission is chosen and designed. Design of those elements is conducted using the most common CATIA V5 modules: part, assembly and shape design [2]. Within the design phase it is also necessary to have a corresponding calculation of transmission components taking geometric and loading requirements into account, aimed at achieving a proper and optimal model [3]. Computer aided design of such a machine created as a complex system using the CATIA V5 software is advantageous because it also covers hydraulic, electric and all other peripheries with particular modules such as pipe and tube design [4].

The aim is to complete the design process of the machine production line for HVAC ducts. This paper presents simulations of a few important phases in this process using the DMU kinematics module, such as the finite element analysis of construction and displacement values using the structure analysis module of CATIA V5 as an advanced software tool [5].

1

A. Marinkovic, N. Rudonja, M. Komatina, D. Antonijevic, N. Dondur, P. Milicevic, "Production of HVAC ducts in Serbia - techno economic analysis and feasible technical solutions", 14th Symposium on Thermal Science and Engineering in Serbia, October 13-16., Sokobanja, Serbia, 2009.

2

R. Haslauer, "CATIA V5 - Konstruktionprocesse in der Praxis", Carl Hanser Verlag, München, Wien, 2005.

3

M. Ognjanovic, "Mašinski elementi, IV izdanje", Mašinski fakultet, Univerziteta u Beogradu, Beograd, 2006.

4

Dassault Systemes, "CATIA Documentation for Part, Assembly, Drafting Shape, Pipe and Tube Design", version V5R18, 2007.

5

H.B. Woyand, "FEM mit CATIA V5", J. Schlembach Fachverlag, Wilburgstetten, 2005.

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