The method of obtaining pre-progestagenic stresses in hot-rolled and cold-rolled strips and sheets, implemented with the work strip and sheet products in the industrial products and roll-formed structural sections used in building constructions

 

(57) Abstract:

The invention relates to the metallurgical industry, in particular the production of hot rolled, cold rolled strips and sheets. Can be used for the production of electrical steels for high crystalline perfection and domain textures. Provorachivayuschie voltage produced by winding the strip, tucked into the cassette, consisting of four rollers and two working rollers of smaller diameter. Diameter working rollers is determined depending on the size of the strip thickness, the elastic ability of the material strip and the working strip tension between the uncoiler roll and the winder strip into a roll, providing dense girth stripe certain parts forming the working roller of small diameter. Strip roller in the cartridge refilled according to the scheme: decoiler roll band arrives on the first support roller, then work on the mini roller-diameter, then the band comes in on the second and third support rollers, and with them work on a mini-movie and the last support roller, with which the strip is wound into a roll on the winder. When the girth tightly folded strip to forming a working roller in the upper layer of strips is not. When the strips on the straight line segment is extremely stretched upper layer of the strip cannot restore its previous size and stretches the underlying layers of the strip, giving the band a pre provorachivayuschie voltage, which are designed to improve the operational characteristics of hot-rolled strips and sheets when working in their products and building structures. 1 Il.

The invention relates to the field of metallurgical industry, in particular rolling production of hot rolled and cold rolled strips, sheets, plates and structural shapes bent.

For improving the operational characteristics of cold-rolled and hot-rolled strips and sheets are necessary for the creation of their high strength material with high resistance to loads, including loads of the first kind, when the products of steel in building construction, engineering and other industries.

Currently vysokoprochnost characteristics of the rental are achieved by alloying steel in the melting and heat treatment. This leads to an increase in the cost of rent, and with a slight increase of improving its performance.

To izvlechat uprugonapryazhennykh car in the form of cold rolled strips and sheets. This cold rolling of strips is carried out in a fluted rollers with annular grooves on their smooth surface, allowing you to get on the surface of the strip longitudinal ribs, which, after recrystallization annealing rolled in the stretched band(see patent 2074776).

However, for prestressed hire must have a very solid additional, energy-rich, equipment: tower furnace, continuous annealing, skin pass mills and other solid equipment, which significantly increases the cost per unit produced finished products.

The objective of the invention is to reduce the unit cost of products, reduction of process operations and equipment, and performance characteristics of the material of the products obtained.

This object is achieved in that before using hot rolled and cold rolled strips in products and structures they passed through the roller device containing at least four rollers and two rollers of small diameter, collected in the cassette.

Strip and roller device dressed in such a way that Orono its surface. Band through the roller device is transported with tension, and the operation may be repeated to improve performance, if this allows the elastic properties of the material strip.

The diameters of the working rollers of small diameter are determined depending on the thickness of the strip and the possibility of stretching the upper layer of material of this band for a given optimal size without destroying the continuity of the strip material. Used some thin layer of the surface of the strip, which is stretched to a certain size, beyond which there is no possibility of the return of the extended area to its original position original size, because lost elastic possibilities of the material strip, beyond the limit of acceptable extension.

The essence of the proposal is illustrated by a drawing. The drawing shows a roller device in longitudinal section. The device consists of four support rollers 1 and two working rollers of small diameter 2 collected in the cassette. Through the roller device filled band 3 according to the scheme: decoiler roll on the first support roller, and then on the working roller of small diameter, then the second and third rollers, further work roller of small diameter, and which operate as follows. When the girth tightly folded strip to the forming roller of small diameter, when optimally selected diameter of the working roller, the surface layer is stretching the layer size beyond the elastic ability of the material strip, for which reset its original size it is no longer possible, because the lost of the elastic properties of the material strip.

The resulting tension in a specific layer of the strip surface, this layer in straight strip transportation, trying to recover its original dimensions, continues to be stretched and therefore receives compressive stress due to the fact that he no longer has the opportunity to reduce their original linear dimensions up to standards. Therefore, the top layer, smoothing it on a straight stretch, stretches the lower layers of the strip, on the size of the increment of the linear size of the upper layer, while diverting the band working roller of small diameter, and the band, mainly the volume receives tensile stress, relying on a tangent on top of the previously drawn-layer strip, which can not be compressed to the original size, because I inner layers of the strip.

If, for example, according to laboratory mechanical testing of material processed strip of elastic properties were determined to 10%, on the basis of a site specific measurements, it is not limited equipment rolling mill tension strip roller in the cassette that is created between the uncoiler and the winder mill, can provide stretching of the strip in the cassette by at least 8%. Additionally, the stretching of the strip tension of the upper layers of the strip should be extended by no less than 3-4% of the working rollers of small diameter in the cassette. Stretching is achieved by bending the strip around the working roller, which is accompanied by stretching of the upper layer of the strip, due to the difference of the diameter of the roller without a band and with the band, i.e. by the difference in the linear dimensions of the circumferences of the roller without a band and with the band.

If the working rollers is selected, for example, with a diameter of 50 mm, and the thickness of the processed strip 2 mm, the linear dimension of the strip surface, lying on the surface of the working roller is l=D or l=3,1450=157 mm, and the linear size of the circumference of the surface of the strip outside surface of the roller l1= (D+2); l1= 3,1452= 163,28 m Difference in linear dimensions is l1-l= 163,28-157= 6,28 mm In the interest of the public strip thickness and according to the elastic properties of the material strip. The tension of the strip between the uncoiler and the winder, charged roller in the cartridge, not limited by the structure of the equipment.

In addition to the above mentioned proposal may be used in the production of transformer steel to obtain vysokolegirovannoj crystalline domain and textures, reducing cotton loss and magnetostriction when working transformer steel in industrial transformers and other electrical devices powered by alternating current.

The proposal is cost-effective in its use in the metallurgical industry, and the expected profit from the sale of products and its products and structures can be obtained and compared with the known methods of obtaining such products currently during hot rolling structural shapes.

The method of obtaining pre-progestagenic stresses in hot-rolled and cold-rolled strip, including dressing strip decoiler roll in the cassette, consisting of reference and working rollers of smaller diameter and rewind the strip decoiler coil winder for winding the strip into a roll, the balance of which is determined depending on the thickness of the strip, elastic possibilities of the material strip and the working strip tension between the uncoiler roll and the winder strip into a roll, dressing strip in the cassette carried out with a certain tension, with thick girth portion forming a working roller band, first on the first support roller, and then on the working roller, the second and third support rollers on the second working roller and the fourth support roller, with which the strip is wound into a roll.

 

Same patents:

The invention relates to cold working of metals and alloys by the method of plastic deformation and can be used in mechanical engineering for finishing cylindrical surfaces vibracathedral to get on the friction surfaces of a given micro-relief, which provides optimal conditions lubrication, minimum friction and minimum wear

The invention relates to a device for ultrasonic strain hardening steel balls of parts such as bodies of rotation and can find application in various engineering industries

The invention relates to mechanical engineering and can be used to improve wear resistance and cyclic durability of machine parts

The invention relates to the processing of metals by pressure, in particular to the preparation of material for further processing methods of forming processes

The invention relates to the field of protecting steel from corrosion as stress corrosion cracking under tension, intergranular corrosion, pitting corrosion, crevice corrosion, General corrosion

The invention relates to the field of protecting steel from corrosion as stress corrosion cracking under tension, intergranular corrosion, pitting corrosion, crevice corrosion, General corrosion
The invention relates to the field of ferrous metallurgy, in particular to the production of rolled sheet of low carbon steel boiling

The invention relates to the field of mechanical engineering and can be used in various fields of engineering
The invention relates to mechanical engineering and can be used when restoring a worn cast iron cylinder liners

The invention relates to the field of metal forming and can be used to form the pieces of a given microstructure, including submicrocrystalline and nanocrystalline, and the corresponding received structural state of physical and mechanical properties

The invention relates to equipment for stretching-card-mounting presses used in the formation of large parts of double curvature in the aerospace industry, and can be used in shipbuilding and other industries, including for another purpose

The invention relates to the processing of metals is flexible and can be used in the manufacture of parts of the aircraft from hard-to-deform materials

The invention relates to the field of metal forming, manufacturing elements of the outer hulls of the ships, vessels and other structures of complex shape

The invention relates to the processing of metals by pressure, in particular to the manufacture of elements of stamped shells by successive local taps

The invention relates to the processing of metals by pressure, in particular to the manufacture of elements of stamped shells

The invention relates to the field of mechanical engineering at the restoration of the damaged walls of vehicle bodies, rolled ferrous and nonferrous metals and some types of sheet plastic products

The invention relates to a method of manufacturing odnochipovogo bellows cylindrical shells

The invention relates to the processing of metals by pressure, in particular to a device for the manufacture of bellows

The invention relates to the treatment of metal sheet blanks pressure and can be used for manufacturing, in particular, elements of the sheathing of ships and vessels and other structures of complex shape

The invention relates to the treatment of metal sheet blanks pressure and can be used for manufacturing, in particular, elements of the sheathing of ships and vessels and other structures of complex shape

The invention relates to metallurgy, and more particularly to rolling sheet steel
Up!