摘要:
To obtain a short adjustment time with small risk of metal break-out, it is intended during the changing of the dimensions of a continuously cast strand to alter during the casting operation i.e. while the pour or teeming operation is in progress, at least during a time interval of the pivotal movement of the mold wall, the mutual relationship of the displacement speeds of two devices for moving the mold wall and the position of the pivot axis of the mold wall is shifted parallel to its starting position.
摘要:
A method of decreasing the width of a continuously cast strand, especially a steel strand, wherein at least one small or narrow side of an adjustable continuous casting mold is displaced during the casting operation. The small side is intermittently moved in the direction of the center or lengthwise axis of the mold at a mean velocity of v".ltoreq. f .times. S.times. tan .theta., in such a manner that there successively follow one another movement- and standstill time sections each amounting to 1/2f minutes wherein f represents the mold oscillation frequency, S the length of stroke or double amplitude of the mold, and .theta. the taper angle enclosed by the short side of the mold with the vertical.
摘要:
Provided herein is a system, apparatus, and method for continuous casting of metal, and more particularly, to a mechanism for controlling the shape of a direct chill casting mold to dynamically control a profile of an ingot cast from the mold during the casting process. Embodiments may provide an apparatus for casting material including: first and second opposing side walls; first and second end walls extending between the first and second side walls, where the first and second opposing side walls and the first and second opposing end walls form a generally rectangular shaped mold cavity. At least one of the first and second opposing side walls may include two or more contact regions, where each of the two or more contact regions may be configured to be displaced relative to a straight line along the side wall.
摘要:
There is provided a strip casting method using a twin roll strip casting process in which molten steel is supplied through an injection nozzle to a region between twin rolls rotating in opposite directions to produce a strip having a predetermined thickness and a high degree of edge quality. The twin roll strip casting method includes: performing the casting process by setting a casting thickness to have a minimal value during an early stage of the casting process in which edge bulging occurs; and performing the casting process by increasing the casting thickness to a maximum value after the molten steel reaches a pre-set target temperature as the casting process proceeds.
摘要:
A method of casting a thin strip is disclosed. The method includes assembling a pair of side dams adjacent end portions of counter-rotating casting rolls through which a strip of metal can be cast to permit a casting pool of molten metal to be formed supported by the casting surfaces of the casting rolls, assembling a metal delivery system above the casting rolls delivering molten metal to form a casting pool supported on the casting surfaces of the casting rolls above the nip and confined by the pair of side dams, assembling a mechanical screw drive to move axially the side dams toward the casting pool, counter-rotating the casting rolls such that the casting surfaces of the casting rolls each travel inwardly to produce a cast strip downwardly from the nip, and moving the side dams axially inward toward the casting pool at a rate of between 0.4 and 5.0 mm/hour by actuation of the mechanical screw.
摘要:
Exemplary embodiments of the invention provide a casting apparatus for continuously casting a metal strip article (e.g. a twin-belt metal caster or a twin-block metal caster). The apparatus has a casting cavity defined between a pair of moving elongated opposed casting surfaces, and the casting cavity has an entrance and an exit aligned in a direction of casting. The casting cavity is also provided with a molten metal injector at its entrance, the injector having an internal metal channel including a downstream opening for introducing molten metal into the casting cavity, and a pair of side dams at each lateral side of the casting cavity for confining molten metal from the injector within the cavity. At least one of the side dams comprises an elongated element that is movable laterally relative to the direction of casting during a casting operation. The elongated element extends in the direction of casting from the injector longitudinally between the casting surfaces at least to a downstream position within the casting cavity where the metal adjacent the element is laterally self-supporting.
摘要:
Exemplary embodiments of the invention provide a side dam for a continuous metal casting apparatus having elongated opposed casting surfaces forming a casting cavity. The side dam has an elongated upstream part and an elongated downstream part that are mutually laterally pivotable, and a smooth metal-contacting side surface extending continuously from an upstream end to a downstream end of the side dam. The surface has regions thereof formed on the upstream part and the downstream part. Mutual pivoting of the upstream part and the downstream part of the side dam enables the regions of the smooth metal-contacting side surface to be moved out of mutual coplanar alignment. The side dams can therefore be used to form either a convergent or divergent casting cavity to assists the casting procedure and to enhance the properties of the cast article.
摘要:
A twin roll caster including a pair of chilled rolls on which molten steel solidifies for delivery of a steel strip from a nip between the rolls, a noncontact type sensor for measuring thickness distribution of the strip widthwise of the strip, a marking mechanism that makes a mark on the strip whenever the chilled rolls make one rotation, a mark detector that senses the marks on the strip, and a nip estimating mechanism. From thickness-distribution information by the sensor and passed-mark information by the mark detector, the nip estimating mechanism calculates variation of the nip between the rolls whenever the rolls make one rotation, based on variation in thickness distribution widthwise of the strip between confirmed passing of the mark and confirmed passing of the next mark, and stores the same as data.
摘要:
A continuous casting mold cavity narrow faceplate taper gauge that includes a mounting bracket having a first portion with abutment feet for engaging a narrow faceplate of a continuous casting mold cavity and a second portion having a surface disposed at an angle to true horizontal that varies as a function of angle of the faceplate engaged by the first portion. An inclinometer is disposed on the surface of the second portion for providing an electrical signal that varies as a function of angle of the surface to true horizontal. An electronic display is responsive to such electrical signal for indicating taper angle of the faceplate engaged by the bracket.
摘要:
A convoluted boot made of a resilient material has a first collar with a large diameter and a second collar with a smaller diameter. The collars are positioned on rotatable parts which are rotatable relative to one another in an articulatable and/or axially movable condition. Also, the boot has a guiding portion positioned between at least one first freely deformable and movable fold and at least one second freely deformable and movable fold. The guiding portion is angularly movably held on a guiding member connected to one of the rotatable parts. The guiding member, on its outside, is enveloped and defines a spherical face.