| 发明名称 |
METHOD OF AND MACHINE FOR FORMING COMPOUND CURVATURES IN METAL SHEETS BY DRAWING |
| 摘要 |
An improved method of and apparatus for forming sheet material into compound curves by drawing, in which critical positioning, dimensioning and relative curvatures of forming bead stages are provided for such curvatures as sectors of paraboloidal antenna reflectors and other compound curve sheets.
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| 申请公布号 |
CA2056872(A1) |
申请公布日期 |
1992.06.11 |
| 申请号 |
CA19912056872 |
申请日期 |
1991.12.03 |
| 申请人 |
CHU ASSOCIATES, INC. |
发明人 |
CREASER, CHARLES;JOHNSON, RAY C. |
| 分类号 |
B21D25/02;B21D5/06;(IPC1-7):B21D13/06 |
主分类号 |
B21D25/02 |
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