摘要:
Die Erfindung betrifft ein Verfahren zum Schmieden eines metallischen Werkstücks (1) in einer Schmiedepresse, wobei das Werkstück in eine Längsrichtung (T) gefördert und intermittierend von einer Anzahl Schmiedewerkzeugen (2, 3, 4, 5) verformt wird, wobei das Werkstück (1) zwischen dem periodischen Eingriff der Schmiedewerkzeugen (2, 3, 4, 5) um einen Bissabstand (s) in Längsrichtung (T) gefördert wird. Die Erfindung sieht vor, a) dass eine erste Gruppe der Schmiedewerkzeuge (2, 4) das Werkstück (1) beaufschlagt und verformt, b) dass das Werkstück (1) dann um den halben Bissabstand (s) in Längsrichtung (T) gefördert und in dieser Position eine zweite Gruppe der Schmiedewerkzeuge (3, 5) das Werkstück (1) beaufschlagt und verformt, c) dass das Werkstück (1) um einen weiteren halben Bissabstand (s) in Längsrichtung (T) gefördert und dass die Schritte a), b) und c) periodisch wiederholt werden.
摘要:
The invention relates to a method for producing a tube (2) or tubular pre-product from a solid billet in a rolling mill, comprising at least one roll (5a, 5b) acting from the outside on the solid billet or tubular pre-product and a mandrel (4) carrying a piercing head (3) and engaging from the inside in the tube or tubular pre-product, wherein immediately after the solid billet has been completely pierced by the piercing head a fluidized deoxidation agent and/or an inert gas is supplied to the end of the tube or tubular pre-product facing the roll and is guided through the tube or tubular pre-product into the interior of the tube or tubular pre-product when the mandrel is withdrawn. The invention further relates to a rolling mill for performing the method according to the invention, comprising at least one roll acting from the outside onto the solid billet or tubular pre-product and a mandrel carrying a piercing head and engaging from the inside in the tube or tubular pre-product, wherein a device is provided for feeding and introducing a fluidized deoxidation agent and/or an inert gas to the end of the tube or tubular pre-product facing the at least one roll.
摘要:
If a mandrel (6) for extruding metal pipes, having two axially offset pressing surfaces (63; 64) with different radial embossing and having a transition region (66) between these two pressing surfaces (63; 64) has a support surface (62) in the transition region (66) then the negative effect of narrowing, which arises owing to the mandrel (6) shifting from a first pressing position, in which the first (63) of the two pressing surfaces interacts with a die, to a second pressing position, in which the second pressing surface (64) interacts with the die, can be minimised.
摘要:
The invention relates to an extrusion press or tube press (1), in particular for aluminium or aluminium alloys, comprising a press frame which consists of a cylinder bar and a counter bar (3) connected thereto, and in which a moving bar and a moving block receiver (2) are arranged, the moving block receiver being formed to move a block to be pressed, introduced with a loading device, into a compression position in front of the counter bar (3) having a die, characterised in that a shearing device (4) is provided for separating a butt remaining after the extrusion process, and the shearing device (4) is vertically and horizontally movable on the extrusion frame. The invention further relates to a method for separating a butt during extrusion and tube extrusion using an extrusion press or tube press according to the invention.
摘要:
The invention relates to a continuously operating extrusion press, comprising a main pressing plunger active in a receiving element, a preferably hollow counter pressing plunger, and a storage chamber for metal pressing material, wherein said storage chamber can be blocked by means of the receiving element and is operatively connected to the counter pressing plunger, and wherein the main pressing plunger, the counter pressing plunger, and the pressed pressing material can be moved horizontally. In order to enable the continuous pressing of metal, wherein by means of said extrusion press a continuous profiled element that is as uniform as possible can be continuously produced, the operative connection of the storage chamber to the receiving element and to the counterpunch can be blocked under actuation by means of the pressing material.