Abstract:
The invention relates to a method for opening and closing a tapping opening of a metallurgical smelting vessel in particular of an electric arc furnace, in the bottom region of which a wall section having an opening is arranged, wherein a device for moving block elements in a direction (T) perpendicular to the surface normal of the wall section in the area of the opening is arranged below the opening, wherein the device holds the block elements on the wall section in such a way that the block elements lie against the wall section in a sealing manner. In order to achieve wear free and reliable opening and closing of the tapping opening it is provided that, in order to close the tapping opening, a block element free of passage openings is moved under the opening by the device and that, in order to open the tapping opening, a block element having at least one passage opening is moved under the opening by the device, such that liquid metal an drain from the smelting vessel through the passage opening in the block element. The invention further relates to a metallurgical smelting vessel.
Abstract:
The invention relates to a device (1) and a method for laterally guiding a slab (2) on a transport track (3), comprising a first guide rule (4) and a second guide rule (5). The guide rules (4, 5) are arranged opposite each other on both sides of the transport track (3) and are each connected to at least one actuating drive (6) so as to move in a direction of a width of the transport track (3). The actuating drive can be actuated perpendicularly to the transport direction (7) of the slab (2), wherein the respective longitudinal axis (4L, 5L) of the first guide rule (4) and/or the second guide rule (5) can be positioned at a specified angle (α) relative to the transport direction (7) of the slab (2). The first and/or the second guide rule (4, 5) has at least one contact roller (8) which can be brought into contact with a lateral edge of the slab (2) in order to guide and/or compress the slab (2).
Abstract:
A forging press for rotationally asymmetrical parts by warm or hot forming has a stationary press table, a vertically shiftable press ram above the press table, vertically delimiting with the press table a working space, and vertically displaceable between from an upper open position into a lower closed position. An upper part is carried by the ram in the space, and an upper die in the space is in turn carried on the upper part. A lower part sits on the table in the space and below the upper part and carries a lower die in the space and fittable with the upper die in the closed position. A first closing apparatus outside the space bears vertically on one of the dies, and a second closing apparatus outside the space bears vertically via the first closing apparatus on the one die.
Abstract:
A forming machine, particularly a ring-rolling machine, which includes a light section sensor, which is directed at a workpiece disposed in a work region of the forming machine, can work precisely while having a simple mechanical-engineering structure. The light section sensor may be directed at a forming region in which the working tool acts in forming manner.
Abstract:
A continuous casting plant (1) includes at least one continuous casting line, optionally, at least one reducing unit, at least one separation device, and one or more devices for tempering the strip, and at least one auxiliary rolling line is arranged parallel to the continuous casting line with conveyors (10, 10′) for continuously inwardly transferring different slab formats into the line of the continuous casting plant (1).
Abstract:
The present invention refers to an apparatus and a method for investigating an object with a scanning particle microscope and at least one scanning probe microscope with a probe, wherein the scanning particle microscope and the at least one scanning probe microscope are spaced with respect to each other in a common vacuum chamber so that a distance between the optical axis of the scanning particle microscope and the measuring point of the scanning probe microscope in the direction perpendicular to the optical axis of the scanning particle microscope is larger than the maximum field of view of both the scanning probe microscope and the scanning particle microscope, wherein the method comprises the step of determining the distance between the measuring point of the scanning probe microscope and the optical axis of the scanning particle microscope.
Abstract:
If a mandrel for extruding metal pipes, having two axially offset pressing surfaces with different radial embossing and having a transition region between these two pressing surfaces has a support surface in the transition region then the negative effect of narrowing, which arises owing to the mandrel shifting from a first pressing position, in which the first of the two pressing surfaces interacts with a die, to a second pressing position, in which the second pressing surface interacts with the die, can be minimized.
Abstract:
The invention relates to a method and a device for optically measuring the interior of a seamless pipe which is manufactured by rolling or of a pipe which is welded with a longitudinal seam and is manufactured from sheet-metal plates shaped to form half-shells or from a shaped sheet-metal plate or from a metal strip which is unwound from a coil, comprising a sensor means (9) which emits a laser beam (10) in the interior of the pipe (3). In such a method and device, an internal measurement of seamless pipes or pipes which are welded with a longitudinal seam is to be provided with which it is easily possible to determine and model precisely the ovalness and straightness of the pipe (3) in a station. For this purpose there is provision that the sensor means (9) is moved horizontally through the pipe (3), wherein the internal contour (15) of the pipe (3) is measured in that a laser tracker (12) which is positioned at the end of the travel path follows, with its laser beam (13), the respective position of the sensor means (9) in the space of the pipe (3) and senses deviations of the sensor means (9) from straightness.
Abstract:
The invention relates to a method of producing a metal strip (1) in a plant, comprising a continuous casting plant (2), a first furnace (3), a second furnace (4) and an adjoining rolling mill (5). In order to save energy, the method provides in accordance with the invention the steps of: a) establishing a scope of production, which is effected, of metal slabs or metal strips (1), comprising at least two different metal slabs or metal strips (1); b) determining the respective entry temperature (TFM) into the rolling mill (5) for all metal slabs or metal strips (1) to be produced; c) determining an exit temperature (TAO1) from the first furnace (3), wherein this is selected to be smaller than the highest entry temperature (TFM), which is determined in step b), into the rolling mill (5) and smaller than or substantially the same as the lowest entry temperature (TFM), which is determined in step b), into the rolling mill (5); d) operating the first furnace (3) in such a manner that the metal slabs or metal strips (1) to be produced leave the first furnace (3) with the exit temperature (TAO1) determined in accordance with step c); e) heating or reheating a metal slab, which is to be produced, or a metal strip (1), which is to be produced, by means of the second furnace (4) to its requisite entry temperature (TFM) in the rolling mill (5) insofar as this temperature lies above the exit temperature (TAO1), which was determined in accordance with step (d), of the first furnace (3). In addition, the invention relates to a plant for producing a metal slab or a metal strip.
Abstract:
An apparatus for straightening metal strips, including a first, upper group and a second, lower group of straightening rollers arranged in each case immediately in succession in a strip running direction, and a group of individually controllable actuators arranged alongside one another in a transverse direction. An axial bending profile of at least a first of the straightening rollers is settable by the group of actuators. At least one second group of individually controllable actuators arranged alongside one another in the transverse direction is provided. An axial bending profile of the least a second of the straightening rollers, which is in particular different from the bending profile of the first bending roller, is settable by the second group of actuators.