The Hydroforming Formation Of Thin-Walled Special-Shaped Can And Its Numerical Simulation Analysis

Bulging shaped can by hydraulic pressure is a kind of mature process technology, because of its lower costs, simply process and lighten weight, which has developed rapidly and widespread availability in recent years. Mechanism and mechanics in this paper has been detailed. Through elaborating the sheet metal forming numerical simulation technology, the key parameter that suit technology of numerical simulation of shaped can bulging by hydraulic pressure is been summarized. And turn the engineering stress-strain curve of the parameters into the true stress-strain curve. Sheet metal forming software is adopted to simulate the processing of shaped can bulging by hydraulic pressure, in order to offer the guidance for the production processing and mold designing in theories.The main contents of this paper include following parts:1. Designing the diagrammatic sketch of hydraulic pressure mould, and introduce its operating principle; And Through analysis the hydraulic result of the can made of T2.5BA material, comparing with the experiment result, and estimating the correctness of the can parameter, further studies on the feasibility of adopting the Dynaform Software in this simulation;2. Under the special bulging parameter, gets the critical loads of can made of T2BA、T2.5BA、T3 and T4CA materials by theoretical computing and numerical simulation , which offers theoretical foundation for selecting the economical hydraulic pressure equipment;3. The effect of shaped can wall thickness changing on limit of bulge forming is discussed toward the materials of T2BA、T2.5BA and T3; 4. Discussing the relation between coefficient of friction changing and thickness distribution, and the effect of equivalent effective stress; Adopting the T2BA and T3 materials can, and discussing the step of bulging load changing which influence the equivalent effective stress and thickness distribution;5. Adopting the T2BA and T3 materials can, and discussing the step of bulging load changing which influence the equivalent effective stress and thickness distribution; And Discussing the same load but different load velocity change influences the magnitude of equivalent effective stress and thickness distribution;6. Analyzing the shaping procedure of T2BA、T3 and T4CA can, with the frame changing, discussing the different maximum distance of up-and-down protruding part and explain its reasons;...