Study On Multi - Stage O - Tube Upsetting Compound Internal High Pressure Forming And Process Optimization

In lightweight design, high strength material and advanced processing technology is gradually replace the traditional manufacturing. Light industry brings huge economic benefits and saves a lot of energy, conforms to the requirement of the present high quality of life. Hollow structure and high strength material is the main technical part of lightweight, clever use of the internal stress of material to withstand the equivalent force of the solid ones, therefore reduce the overall quality of assembly greatly. That area focused by most of the researchers. Internal high pressure technology is the key factor for metal forming, Comparing with the traditional process, this technology will produce more complex parts, and favored most manufacturers.This paper aims at the multistage ? variable diameter tube’s forming performance. Theoretical analysis and numerical simulation is used in this paper, greatly reduced the cost. At the last, through the experimental verification, paper analyzed the influence of different parameters, and proposed the variable diameter tube forming process theory.Through Virtual. Lab software, we know about the noise reduction performance of the tube, so to optimize the expansion chamber structure to a much reasonable one.Paper put forward a theory of internal high pressure forming method that composite of upsetting and swelling compared the effects of different process on the forming quality, and through fill material contribution to further study the forming strategy.Fuzzy control toolbox is used to set up the index of evaluating the forming quality of the internal high pressure; a more reasonable ratio of internal pressure and feed is obtained by finite element simulation and fuzzy control strategy.