摘要:
The invention relates to a system for processing objects, in particular aluminum extrusions, rods or bolts, comprising a pre-heating system for warming the objects, a furnace subordinate to the pre-heating device for heating the objects and a processing unit subordinate to the furnace and at least one unit for transport to the pre-heating system, to the pre-heating device and to the furnace, wherein the system A comprises a pre-heating device (1) in the design of a magazine, having the characteristic of storing a plurality of objects (S) and removing and adding at least one object (S), wherein the preheating device (1) is operated and heated by the exhaust of the furnace (2). The invention also relates to a pre-heating device.
摘要:
The invention relates to a method for the heat treatment of homogenised, cooled cast metallic slugs, which, in relation to a diameter of 200 mm, is reheated to the required temperature for a maximum period of 20 minutes and then subjected to a passive temperature compensation for a maximum period of 3 minutes so that a uniform temperature of less than
摘要:
Eine Strangpressvorrichtung zur Herstellung eines Profilstranges aus einem Presskörper (36) aus einem wenigstens teilweise metallischen Werkstoff enthält einen Rezipienten (10) mit einer den Presskörper (36) aufnehmende Rezipientenkammer (12), einen Stempel (32), eine formgebende Umformkammer und/oder eine formgebende Matrize (18) und eine zwischen der Rezipientenkammer (12) und der Matrize (18) oder Umformkammer angeordnete Heizeinrichtung (25). Die Heizeinrichtung (25) enthält eine in Pressrichtung angeordnete, aus einem metallischen Hohlzylinder gebildete Heizkammer (22) mit wenigstens einem ersten und zweiten Heizkammerabschnitt (22a,22b) mit Heizkammerwänden (26a,26b) und Mittel (30) zur induktiven Beheizung der Heizkammerwände (26a,26b). Der erste Heizkammerabschnitt (22a) weist unter Ausbildung einer stufenförmigen Querschnittsverengung einen grösseren Querschnittsdurchmesser auf als der in Pressrichtung (x) unmittelbar anschliessende zweite Heizkammerabschnitt (22b).
摘要:
The object of the invention is to apply an appropriate temperature profile to a bloc to be extruded, at which the extrusion process may be optimized. For that purpose, the metal blocks (10a) to be extruded are heated (furnace 2) up to an appropriate extrusion temperature for that metal, are stored at that temperature (holding chamber 3) and are chilled (chamber 5) according to regulation areas (18) in synchronism with the extrusion cycle. Regulation in the areas (18) is carried out by influencing the amount and/or temperature of the coolant, and/or cooling duration, so that an axial and radial temperature distribution is obtained at the block. This temperature distribution allows isothermic extrusion at an optimum extrusion speed, taking into account the heat conductivity of the metal, the heat flow to the remaining block, to the block support and to the extrusion tools (die, matrix), as well as the increase in temperature of the block due to the heat produced by forming and by friction of the block against its support, when such friction is present, i.e., in the case of direct extrusion.