O. Chivu, C. Rontescu, D-T. Cicic, Polytechnic University of Bucharest, Romania This paper presents the results of the practical trials carried out based on the calculation assumptions considered within the FEM of the reconditioning by welding of a crankshaft used in the automotive industry. For the validation of the analytical model it was considered the influence of the crankshaft fixing poss...

This paper describes the conceptual foundations to construct a method on Computer Aided Innovation for product development. It begins with a brief recap of the different methodologies and disciplines that build its bases. Evolutionary Design is presented and explained how the first activities in Genetic Algorithms (GAs) helped to produce computer shapes that resembled a creative behavior. A des...

The technological process, ensuring the accuracy of mechanism assembly is formally a sequential summation primary manufacturing errors and an analysis obtained, generalized values to develop implement specific methods meet process requirements for relative position parts. To ensure crank mechanisms misalignment piston cylinder axes, assembled from specific, randomly received component parts, pr...

For critical steel engine parts, such as crankshafts, the fatigue strength under working condition is usually improved by electromagnetic induction quenching technique. In a previous study, strengthening effect of this approach was always evaluated constant, which may result in some errors with change technological parameters. paper, type crankshaft selected to study approach; first local sub m...

Engine crankshafts are required to be balanced. The balance of a crankshaft is one of several parameters to be analyzed during the design of an engine, but certainly a poor balance leads to a low life time of the whole system. It is possible to optimize the balance of a crankshaft using CAD and CAE software, thanks to the new optimization tools based on Genetic Algorithms (GA) and tools for the...

The OEMs are currently being faced with a variety of contradictions in terms of market demands and governmental regulations, which force them to develop concepts that assure high fuel economy, low exhaust emissions and high specific power. Because mechanical losses can account for up to 10% of the fuel energy used, the key to achieving these specific customer/government demands is to enhance th...

Failures of externally driven compressor crankshafts may sometimes be due to fretting induced fatigue cracks. Fretting is a degradation process which occurs between two faying surfaces where the relative motion between the components is very small. Discoloration, fine o~ide powder, and shallow surface pitting are the definitive signs of fretting and hence relative motion between components. Fra...

In the present work, influence of alloying elements, on mechanical characteristics and wear behavior by modification chemical composition ductile iron was studied, in order to improve these for manufacture agricultural tractors parts particular front rear axles, ploughshares, gear crankcase, pinions, transmission shafts, crankshafts, etc... The cast investigated prepared an induction furnace at...