| Summary: | 碩士 === 國立高雄第一科技大學 === 機械與自動化工程所 === 95 === Abstract
The objective for making precision forgings and for saving the usage of materials can be reached by using multi-action forging die set to proceed the flashless forgings. The processes are primarily applied to the manufacturing of multi-axis cored joint parts. But the structure of multi-action forging die set is very complicated and its design much difficult. In this study, the brass T joint is used as the vehicle to investigate the die set of horizontal split and horizontal multi-action forging.
First, the information of developed multi-action forging die set will be collected and be analyses. Then, the die set is designed and developed by combining a link mechanism and a hydraulic clamping mechanism. At the same time, the forging simulation software DEFORM is used to analyze the stress and strain in the die as well as the situation of material flow during forging. The optimum conditions of the process will be investigated and established by the simulation results. According to the optimum conditions, the horizontal multi-action forging die set with three rams will be tried.
Finally, the feasibility of the die set is investigated by two kinds of forging process such as the cold forging of AA 6061 aluminum alloy and the hot forging of C 37700 forging brass. The results show that the horizontal multi-action forging with three rams is feasible through the simulation of DEFORM. The design of the horizontal multi-action forging die set in this study is feasible as well. The target vehicles, the T joint, are forged successfully by the developed die set and the flow lines of the forgings are reasonable. The measurement is within tolerance. In the actual forging experiment, the clamping force is set at 85 tons and then the billets are put into the die to be forged. When forging AA 6061 aluminum alloy, the forging load is 43 tons. When forging C 37700 forging brass, the forging load is 25 tons.
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