| 摘要: |
| 以某典型大深宽比铝合金整流罩为研究对象，采用数值模拟方法分析了液室压力与压边间隙对起皱的影响规律，优化了成形工艺参数。结果表明，在凸模位移80 mm前加压时，悬空区板料反胀较大，储存的板料较多，容易起皱；当液室压力最大为15 MPa时，悬空区板料同样由于反胀较大而起皱；当压边间隙较大时，悬空区板料由于流入凹模的阻力较小，也容易堆积起皱。优化后，凸模位移为80 mm时开始加压，最大液室压力设定为10 MPa、压边间隙设置为2.2 mm，可以实现该典型大深宽比铝合金整流罩充液拉深成形。 |
| 关键词: 大深宽比 充液拉深 铝合金 整流罩 |
| 基金项目: |
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| Research on the Hydromechanical Deep Drawing Process of Aluminum Alloy Fairing with Large Depth-to-width Ratio |
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Wang Yongming Li Xiaolin Kang Hongze Yuan Nan Zhou Changle Wang Dong Liu Yansong
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Capital Aerospace Machinery Co., Ltd., Beijing 100076
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| Abstract: |
| One typical aluminum alloy fairing with large depth-to-width ratio was studied. By numerical simulation method, the influences of the die cavity pressure and the blank holder gap were discussed. The process parameters were optimized. The results indicate that, when the pressure is applied before the punch displacement is 80 mm, the suspending area blanks are expanded significantly, and there are more blank stored, which is easy to wrinkle. When the maximum pressure is 15 MPa, the suspending area blanks also wrinkle, due to the severe expanding. If the blank holder gap is too small, the suspending area blanks are stocked and wrinkled, due to the lower resistance flowing to the die. This typical aluminum alloy fairing with large depth-to-width ratio can be formed successfully with the optimized prameters pressuring when the punch displacement is 80mm, the maximum pressure is 10 MPa and the blank holder gap is 2.2 mm. |
| Key words: large depth-to-width ratio hydromechanical deep drawing aluminum alloy fairing |
