Deep Drawing of Cylindrical Shell according to the So-called Hydroform Method
| Autor: | FUKUI, Shinji, YOSHIDA, Kiyota, ABE, Kunio |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1958 |
| Zdroj: | 東京大學航空研究所報告 = Report/Aeronautical Research Institute, University of Tokyo. 24(4):77-98 |
| ISSN: | 0376-1061 |
| Popis: | A mathematical analysis of deep drawing work in accordance with the hydroform method was made on the basis of the total strain theory and an investigation made on the general characteristics developing from the use of fluid pressure as a die. The results of analyses and investigations disclose that insofar as the hydroform method of forming is concerned, the influence of friction at the forming radius portion can be neglected due to very little frictional resistance there and the radial tensile stress is reduced by the action of a radial compressive stress at the periphery of a flange. Moreover, the friction force developed between the side wall of a punch and the portion of the formed surface in contact prevents concentration of the forming force on the punch head. For these and other reasons, the hydroform method provides many beneficial features. On the other hand, the detrimental effect of the friction arising between the flange portion and the blank holder plate is greater than when employing a solid metal die which is a great deficiency associated with the hydroform method. At any rate, it is the combination of these advantages and deficiencies which make up the characteristics of hydroforming. The characteristics associated with hydroforming were also investigated experimentally by forming of a cylinder of 30mm in diameter, employing a fluid pressure chamber of 100mm in diameter and under the condition of a maximum forming pressure of 1000kg/cm^2. 資料番号: SA2404773000 |
| Databáze: | OpenAIRE |
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