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| CRITERIA OF FORMABILITY OF COMPONENTS BY SUPERPLASTIC AIR BULGE |
| by WANG Chunrong; CAO Shuzhi (Institute of Metal Research; Academia Sinica; Shenyang) (Manuscript received 15 April; 1986; revised manuscript 1 July; 1986) |
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Cite this article:
by WANG Chunrong; CAO Shuzhi (Institute of Metal Research; Academia Sinica; Shenyang) (Manuscript received 15 April; 1986; revised manuscript 1 July; 1986). CRITERIA OF FORMABILITY OF COMPONENTS BY SUPERPLASTIC AIR BULGE. Acta Metall Sin, 1987, 23(4): 363-367.
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Abstract Four criteria of forming components by superplastic air bulge have been considered as: ratip of width to depth, W/H, ratio of rotary to bottom angle, r/r_0, distribution of forming material, F/S,and angle difference, θ-φ. An empirical dimensionless expression of combined criterion was proposed to be: Q=((WS)/(HF))+(π/180)(θ-φ)-(r/r_0)+0.55 The left-right crosswise duplex helix components were formed by superplastic air bulge. Their formability was determined by the criterion of typical case Q=l under given conditions. It is believed that the judgement of formability and evaluation of forming operation of components by the above mentioned criterion seem to be available.
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Received: 18 April 1987
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1 王春荣,高子明,潘学卿,曹淑芝,申淑兰.金属成形工艺,1984;(4) :10
2 王春荣,潘学卿,高子明,曹淑芝,申淑兰.锻压技术,1984;9(4) :4
3 Thomsen T H, Holt D L, Backofen W A. Met Eng Q, 1970; 10(2) :1' |
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