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    3.
    发明专利
    未知

    公开(公告)号：SE7407507L

    公开(公告)日：1975-12-08

    申请号：SE7407507

    申请日：1974-06-07

    Applicant: ASEA AB

    Inventor： LARKER H ,  LUNDBLAD E ,  LUNDBECK B ,  NILSSON J

    IPC: B21C23/00 ,  B21C23/08

    Abstract: In the hydrostatic extrusion of tubes in a press which has a pressure chamber containing a high pressure cylinder, a pressure generating portion insertable into the cylinder, a die arranged in the cylinder and a mandrel axially fixed in relation to the die and composed of a carrier portion and a tip, and in which the tip forms with the opening in the die a gap in which a tubular billet is shaped into a tube by hydrostatic extrusion, in connection with the insertion of the tubular billet, a seal is produced initially between the mandrel and the hole in the billet at a point between the front part of the mandrel carrier and the hollow wall of the billet. This may be done by producing a constriction of the front end of the hole in the billet before the mandrel is inserted therein or by upsetting the billet against the die.

    4.
    发明专利
    未知

    公开(公告)号：SE7415296L

    公开(公告)日：1976-06-08

    申请号：SE7415296

    申请日：1974-12-06

    Applicant: ASEA AB

    Inventor： NILSSON J ,  LUNDBECK B ,  SYVEKARI P ,  GUSTAVSSON S-G ,  LILJA K ,  LARSSON H G

    IPC: B21C23/21 ,  B21C23/00 ,  B21C27/00 ,  F16J10/02 ,  F16J15/08 ,  F16J15/48

    Abstract: A press for hydrostatic extrusion includes a pressure chamber for enclosing a pressure medium which is formed of a high pressure cylinder, a pressure generating piston, a die and a die support and seals. The die support includes an exchangeable support ring which engages the end surface of the liner and bridges the gap between the liner and the die. A metallic sealing ring is arranged within the liner in engagement therewith, forming a gap between the inner surface of the sealing ring and the outer surface of the die or die support. The die support has a groove in its upper surface which contains a sealing member against which the edge of the metallic sealing ring engages. The lower outer corner of the metallic sealing ring is bevelled to form a space which communicates with the outside of the press.

    6.
    发明专利
    未知

    公开(公告)号：SE403348B

    公开(公告)日：1978-08-14

    申请号：SE7415296

    申请日：1974-12-06

    Applicant: ASEA AB

    Inventor： NILSSON J ,  LUNDBECK B ,  SYVEKARI P ,  GUSTAFSSON S-G ,  LILJA K ,  LARSSON H G

    IPC: B21C23/21 ,  B21C23/00 ,  B21C27/00 ,  F16J10/02 ,  F16J15/08 ,  F16J15/48

    Abstract: A press for hydrostatic extrusion includes a pressure chamber for enclosing a pressure medium which is formed of a high pressure cylinder, a pressure generating piston, a die and a die support and seals. The die support includes an exchangeable support ring which engages the end surface of the liner and bridges the gap between the liner and the die. A metallic sealing ring is arranged within the liner in engagement therewith, forming a gap between the inner surface of the sealing ring and the outer surface of the die or die support. The die support has a groove in its upper surface which contains a sealing member against which the edge of the metallic sealing ring engages. The lower outer corner of the metallic sealing ring is bevelled to form a space which communicates with the outside of the press.

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