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CN-119857830-B - Roll gap floating method for double-roll thin belt

CN119857830BCN 119857830 BCN119857830 BCN 119857830BCN-119857830-B

Abstract

The invention provides a roll gap floating method for a double-roll thin belt, namely roll gap fixed opening degree-synchronous floating, and belongs to the technical field of double-roll thin belts. In the preparation process, the roller gap floating process and the roller system moving process are controlled to synchronously and simultaneously occur, and the change of the roller gap floating process to the placing plane and the change of the roller system moving process to the placing plane are all counteracted in real time, so that the two roller bodies always keep static to the ground. Compared with the traditional technology, the technical scheme provided by the invention has the advantages that in the roll gap floating process, the two roll bodies and the side sealing device are always kept to be grounded, so that the influence of the roll gap floating process on the side sealing device can be completely eliminated in theory, and further an infinite technological parameter interval is provided in theory.

Inventors

  • XU MIANGUANG

Assignees

  • 山东理工大学

Dates

Publication Date
20260508
Application Date
20240925
Priority Date
20231020

Claims (8)

  1. 1. The roll gap floating method for the double-roll thin strip comprises the steps that a roll system is integrally and movably arranged on a double-roll thin strip casting machine, the roll system comprises a first roll body and a second roll body which are oppositely arranged and used for preparing a blank, a roll shaft of the first roll body is called a first roll shaft, a roll shaft of the second roll body is called a second roll shaft, and a plane where the first roll shaft and the second roll shaft are located is called a placing plane of the roll system; Characterized in that the method comprises the steps of: the first floating, namely the second roller body is static to the ground, the first roller body is controlled to rotate around the second roller shaft once without stopping, meanwhile, the roller system is controlled to rotate around the second roller shaft, and the placing plane is always static to the ground; the second floating, namely the first roller body is static to the ground, the second roller body is controlled to rotate around the first roller shaft once without stopping, meanwhile, the roller system is controlled to rotate around the first roller shaft, and the placing plane is always static to the ground; wherein during one preparation, the first float occurs at least once and the second float occurs at least once.
  2. 2. A roll gap floating method for a twin roll thin strip as defined in claim 1, The method is characterized in that: The minimum distance between the first roller body and the second roller body is called a roller gap, the middle point of the roller gap is called a Nip point, the moving speed of the blank at the Nip point is called a preparation speed, the moving speed of the Nip point caused by the relative motion between the first roller body and the second roller body is called a floating speed of the Nip point, the inner product of the floating speed and the preparation speed is called a first inner product in the process of each occurrence of the first floating, and the inner product of the floating speed and the preparation speed is called a second inner product in the process of each occurrence of the second floating; The first inner product is always less than zero during each occurrence of the first float and the second inner product is always less than zero during each occurrence of the second float.
  3. 3. A roll gap floating method for a twin roll thin strip as defined in claim 1, The method is characterized in that: the first float and/or the second float occur at a frequency in the range of 0.1 to 5 hertz.
  4. 4. A roll gap floating method for a twin roll thin strip as defined in claim 1, The method is characterized in that: The first float and/or the second float occurs at a frequency in the range of 0.01 to 10 hertz.
  5. 5. A roll gap floating method for a twin roll thin strip as defined in claim 1, The method is characterized in that: In one preparation, any of the following modes occurs: -the first floating and the second floating occur once, wherein once the first floating and once the second floating are combined arbitrarily; The first floating and the second floating of a plurality of times occur once, wherein the first floating and the second floating of a plurality of times are arbitrarily combined; The first plurality of floats and the second plurality of floats occur, wherein the first plurality of floats and the second plurality of floats are arbitrarily combined.
  6. 6. A roll gap floating method for a twin roll thin strip as defined in claim 1, The method is characterized in that: the first float and the second float occur sequentially and repeatedly.
  7. 7. A roll gap floating method for a twin roll thin strip as defined in claim 1, The method is characterized in that: The angle of rotation of the placement plane solely caused by the movement of the roller system during each occurrence of the first float is referred to as a first angle, the angle of rotation of the placement plane solely caused by the movement of the roller system during each occurrence of the second float is referred to as a second angle, and the first angle and the second angle are equal in magnitude.
  8. 8. A roll gap floating method for a twin roll thin strip as defined in claim 7, The method is characterized in that: the first angle and/or the second angle is in the range of 0.01 to 10 degrees.

Description

Roll gap floating method for double-roll thin belt Technical Field The invention relates to the technical field of double-roller thin belt processes, in particular to a roll gap floating method for a double-roller thin belt. Background The twin roll strip process was proposed by the uk metallurgist Bessemer jazz around 1850. The blanks prepared by the twin roll strip casting machine are not necessarily thin strips, but are only one habitual name formed for a long time in the technical field (hereinafter referred to as the field) related and attributed to the application document of the invention, and the "thin strips" include thin strips, pipes, bars, plates and other blanks with special cross-sectional shapes. In the twin roll ribbon process, the components that make up the melt pool include two crystallization rolls that are disposed opposite and in parallel; the "crystallization roll" is also referred to as a "roll body"; the two crystallization rollers are respectively called a first roller body and a second roller body, and the first roller body and the second roller body can be simply called as two roller bodies; the roll axis of the roll body is simply called a roll shaft, a person of ordinary skill in the art can directly and unambiguously know the roll shaft by reading the patent application document of the invention, the roll shaft of the roll body is properly, clearly and unambiguously used in the patent application document of the invention, the roll shaft of the first roll body is called the first roll shaft, the roll shaft of the second roll body is called the second roll shaft, the roll shaft is a virtual straight line, the first roll shaft and the second roll shaft can be simply called the two roll shafts, the surface of the roll body, which is in direct contact with materials in a molten pool, is called a roll body working surface, the roll body working surface is simply called a roll surface, the person of ordinary skill in the art can directly and unambiguously know the roll surface, the surfaces, which are perpendicular to the roll shaft, of the two ends of the roll body are called end faces, when a contact type side is used, the roll gap is formed by periodic or aperiodic direct contact with the contact type side sealing plates, a gap is left between the two roll bodies, the minimum distance between the two roll bodies is called a gap, the two roll gap is left between the two roll bodies, the two roll gap can be called the minimum distance between the two roll gap is the two roll gap, the two roll gap can be called the gap is more than the full-width of 10 mm, the gap can be sealed at the opening is more than the normal opening at the opening of 10 mm, the end-to the end of the end gap is more than the opening at the end of the normal opening, and the end of the roll gap is the roll gap, and the end of the roll gap is the normal at the opening, and the opening is the end gap is the opening at the end of the point of the most has the opening at the 5.10 mm is the 5.the 5 mm is the normal conditions is the end at the opening at the end at the opening is the roll gap at the roll gap is the, the contact type side sealing device is generally made of refractory materials, the contact type side sealing device needs to be in close contact with the end face of a roller body under the action of certain pressure, the side sealing device can be worn due to the close contact, a cooling water path can be arranged inside the roller body, in the preparation process, the two roller bodies rotate oppositely, materials need to be added into a molten pool, the materials move out of the molten pool from a roll gap to form a blank body with certain specification under the action of shearing driving force provided by the roller bodies, and the rotation of a crystallization roller and the viscosity of a cast-rolled material in the molten pool jointly enable the molten pool to generate a shearing driving force field for promoting the blank body to be continuously formed, so that the double-roller casting has the characteristic of 'a movable crystallizer technology'. The materials entering the molten pool comprise liquid metal, the liquid metal can enter the molten pool through a flow distribution device, and the materials can comprise solid substances, for example, when a double-roller method is used for preparing a multi-layer material in a solid-liquid composite mode, the solid substances are required to be added into the molten pool. The bath geometry and the technological base of the twin roll ribbon process are quite different from those of conventional continuous casting processes, and in the absence of experimental means, the art considers that the growth of the solidified shells in the bath is regular as shown in fig. 1, with the two solidified shells starting at the meniscus and gradually increasing in thickness until the weld forms a Kiss point. The inventor discloses a method for representing the tra