FIELD: technological processes.
SUBSTANCE: invention relates to metal forming and can be used for fabrication by cold forming of panel-like molded article from metal sheet with ultimate tensile strength 390 MPa or more and 980 MPa or less. Workpiece is impressed by first and second punches. At that, indentation of workpiece by means of the second puncheon is completed till completion of workpiece pressing by means of the first puncheon.
EFFECT: quality of the product increases.
9 cl, 7 dwg, 3 tbl
| Title |
Year |
Author |
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2016 |
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|
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2017 |
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|
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2014 |
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- Jonebayasi, Toru
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|
RU2661681C2 |
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|
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2015 |
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|
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2017 |
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|
RU2693402C1 |
