Notice of RetractionNumerical simulation and experiment on precision forging of driven spiral bevel gear
In this paper, the numerical simulation of precision forging on driven spiral bevel gear was explored based on its physical simulation. The forming stage and the metal flow characteristic were analyzed; thereby the process of precision forging was designed. The material was 20CrMnTi and the equipment was friction press. The workblank of driven spiral bevel gear was manufactured successfully at 950°C~1000°C. It was indicated that the numerical simulation of was reliable and effective. Moreover, the results would be beneficial to industrialization producing driven spiral bevel gears using precision forging.
Numerical simulation and experimental study of the precision forging of spur gear
The precision forging of a hollow spur gear is simulated by three dimensional rigid plastic finite element method and experiment.By finite element analysis and experimental study,metal flow behaviors and deformation mechanics characteristics of the hollow spur gear treated by precision forging are obtained.Deformation mechanism is illustrated,and the numerical simulation results are in good agreement with the experimental results.
Increasing tool life in cold forging through advanced design and tool manufacturing techniques
Abstract In this paper, results of two investigations concerned with the evaluation and prediction of fatigue failure and the improvement of tool service life in cold forging are presented. The first study presents an integrated approach to tool stress analysis and shows its possible application for a punch failure case provided by industry. The second study experimentally investigates measures that can be taken during design and tooling manufacture to reduce fatigue failure. Both studies clearly indicate the value of performing a tool stress analysis during the process and tool design phase.