FIELD: plastic metal working. SUBSTANCE: blank is deformed at simultaneously passing electric current through deformation zone until providing its plastic condition. Electric current is applied by pulses to central portion of said deformation zone along working width equal to 0.35-0.45 of diameter of opening being flanged. EFFECT: enhanced efficiency. 1 tbl, 2 dwg
Title | Year | Author | Number |
---|---|---|---|
APPARATUS FOR EXPANDING TUBULAR BLANKS | 1993 |
|
RU2097162C1 |
METHOD OF STRETCHING SHEET BLANKS | 1992 |
|
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TITANIUM ALLOY PIPE EXPANDING DIE | 1996 |
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METHOD FOR FLANGING OPENINGS IN SHEET BLANK | 1998 |
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APPARATUS FOR MAKING T-PIECES FROM TUBULAR BLANK | 1997 |
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APPARATUS FOR FLANGING TUBE WALL | 1998 |
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RU2139766C1 |
METHOD FOR DRAWING ARTICLES OF SHEET MATERIALS | 1998 |
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APPARATUS FOR FLANGING OPENINGS IN SHEET BLANKS | 1998 |
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RU2152284C1 |
PUNCH FOR EXPANDING TUBE ENDS | 1997 |
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RU2127165C1 |
APPARATUS FOR FORMING PARTS AT RESISTANCE HEATING OF BLANKS | 1995 |
|
RU2087240C1 |
Authors
Dates
1998-02-27—Published
1993-06-15—Filed