发明名称 |
A METHOD FOR THE MANUFACTURE OF A VESSEL BOTTOM WITH A FLANGE |
摘要 |
A method for the manufacture of a vessel bottom with a flange includes the following steps: after heating of an ingot to a forming temperature, a preliminary forging (1) in shape of a circular plate having the height (H) and diameter (0) is made by free forging on a forging press; after the second heating to a forming temperature, the preliminary forging (1) is placed on a working plate (4) of a lower swage and the first male die (2) is pushed concentrically into the forging (1) to a depth necessary for the formation of a flattened segment (3); the flattened segment (3) is rotated by 180° and after its location on a machine tool a bellows (7) is formed by mechanical machining, which has in the centre a recess (X) and around the perimeter of the convex region (5) a recess (Y) having the radius (R); after heating, the bellows (7) is placed on a pre-prepared set of tools for the pressing via the convex part (5) upwards on a forming ring (8); the main male die (10) is pushed concentrically into the bellows (7) for pressing the bottom (11) by means of a reverse drawing, the bottom (11) being equipped with an external flange (6). |
申请公布号 |
EP2807651(B1) |
申请公布日期 |
2016.04.27 |
申请号 |
EP20110863254 |
申请日期 |
2011.12.28 |
申请人 |
VÍTKOVICE HEAVY MACHINERY A.S.;VYSOKÁ SKOLA BÁNSKÁ - TECHNICKÁ UNIVERZITA OSTRAVA |
发明人 |
PETRZELA, JIRÍ;LÁSZLÓ, VLADIMÍR;CECHEL, TOMÁS;GREGER, MIROSLAV |
分类号 |
G21C13/02;B21D51/00;B21D51/18;B21J5/00;B21K21/02;B21K21/06;B21K23/04;F16J12/00;G21C21/00 |
主分类号 |
G21C13/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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