WO2008089526A1 - Procédé et machines de nettoyage de laminé - Google Patents

Procédé et machines de nettoyage de laminé Download PDF

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Publication number
WO2008089526A1
WO2008089526A1 PCT/BG2008/000001 BG2008000001W WO2008089526A1 WO 2008089526 A1 WO2008089526 A1 WO 2008089526A1 BG 2008000001 W BG2008000001 W BG 2008000001W WO 2008089526 A1 WO2008089526 A1 WO 2008089526A1
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WO
WIPO (PCT)
Prior art keywords
machine
chamber
cleaning
chambers
cylinders
Prior art date
Application number
PCT/BG2008/000001
Other languages
English (en)
Russian (ru)
Inventor
Georgi Petkov
Stefan Deevski
Stefan Ivanov
Original Assignee
Georgi Petkov
Stefan Deevski
Stefan Ivanov
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Georgi Petkov, Stefan Deevski, Stefan Ivanov filed Critical Georgi Petkov
Publication of WO2008089526A1 publication Critical patent/WO2008089526A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning

Definitions

  • the invention relates to a method and a machine for cleaning rolled products, which can be used in metallurgy and metalworking for cleaning scale and removing surface defects of black and non-ferrous metal.
  • Scale cleaning and removal of surface defects is the main problem for obtaining high-quality calibrated rods, wires and some types of parts processed using plastic deformation.
  • Various methods are applied - chemical / etching /, electrophysical, ultrasonic and mechanical.
  • mechanical, shot blasting technologies and machines are most widely used.
  • the main disadvantage of this type of machine is the intensive wear of the turbines and the high energy intensity of the process, which is the result of firing a lot of pellets, of which only a small part hits the target, as well as their continuous transportation from a low-placed collection store to the corresponding turbines in the working chamber.
  • the process is especially ineffective when cleaning wire or bar stock, where only a few percent of the pellets hit the target, and all the others give their energy through impacts on the walls of the chamber or in specially made reflectors, which in turn requires that they be produced / like turbines / made of highly wear resistant materials. For these reasons, they are large in size with large installation capacity and high cost. In addition, they cannot remove surface defects.
  • Known machines for cleaning rolled metal with an unlimited length for example, a roller tint, which operate by the method of centrifugal stripping layer / 3 /, in which metal shot is fed into a rotating drum. Due to action centrifugal forces the fraction is distributed around the periphery of the drum, and the centrifugal layer has a certain thickness and density. Stripped rolling during its forward movement passes along the entire length of the drum layer, and it is cleaned on one side and leaves the working area of the drum, passes through a stretching device and a system of bending rollers, and then returns back to the drum to be cleaned on the other hand, symmetrically to its horizontal axis.
  • the machine is equipped with filtering and ejector systems for sucking off scale and transporting fractions.
  • a significant drawback of the machine is its ineffective use when cleaning rolled products with a limited length - rods that, when passing through the centrifugal layer of the working cylinder, are rotated around their axis with the help of a special device, which leads to the attraction of pellets between the rotating rod / rod / and supporting it with the opposite side of another device called lineal, which runs along the entire length of the working drum and rests in two fixed machine covers. Attracted pellets not only intensively wear out the expensive lineal, but also leave traces on the surface of the rolled metal.
  • a known method and machine / 4 / for cleaning rolled metal with an unlimited length with the aim of avoiding part of the above drawbacks - mainly to increase the range of machined diameters at which the rotating working cylinder, forming a centrifugal layer of pellets, is given at the same time a round-off eccentric movement around the axis of the rolling in the opposite direction to the rotation of the cylinder.
  • the machine performing the method consists of a hollow cylinder, both ends of which are mounted on supports fixed in the holes of two eccentric discs attached to the body, which have gear rims on the periphery.
  • gear crowns are geared to the drive gear motor group and interconnected by a synchronizing gear transmission, and in the area between the eccentric discs, the hollow cylinder is mounted on a support in the connecting rod hole, the other end of which is connected with a spherical coupling to a slider placed in the socket to the machine body.
  • a gear ring is mounted to the cylinder, coupled to a gear wheel mounted on a support in the slide housing and driven by an electric motor mounted on the connecting rod housing.
  • the main disadvantage of the above machine is its complex design, high cost and low reliability. In addition, it does not solve the problems with the immobility of the support layer, wear of the cutting edges of the pellets and clogging, it is not applicable for cleaning the rod. A significant drawback is the unreliability and the need to provide high-energy nutrition grains for the working cylinder, which is open on two sides. Due to these shortcomings, this machine has not found practical application.
  • a known machine operating by the centrifugal layer method (5) which consists of four centrifugal heads mounted on a common housing, through which four-sided coverage is balanced by the ratio of pressure and rotation of the layers in the working cylindrical chambers of the four centrifugal heads, and thus complete - in the overlap from 480 to 520 degrees, the processing of the cylindrical surface of the car, which passes through them in only one direction.
  • the reference line is removed when the bar is rolled.
  • this machine however not the main disadvantage associated with the immobility of the main part of the centrifugal layer, the wear of the cutting edges of the pellets and clogging is solved.
  • the objective of the invention is to provide a method and a machine for cleaning rolled products with a limited and unlimited length, which to the maximum extent possible eliminate all the existing disadvantages of the known methods and machines currently used for this purpose, and in addition to ensure the processing of the entire surface of the rental during its one-time passage through the machine.
  • Another objective of the invention is to provide continuous updating of the cutting edges of the metal shot by the continuous movement of grains in the processing zone.
  • the tasks are solved using the proposed method for cleaning rolled products with a limited and unlimited length, by means of a centrifugal layer of pellets, characterized in that it includes: a) the progressive passage of the rolled products through two centrifugally driven layers of pellets that are in the opposite direction, and b ) both centrifugal layers have a conical shape and are directed towards each other with their large diameters, moreover, c) a processing vortex flow is formed between them, from which d) part of the metal fraction and spent metal particles (scale) are found.
  • the proposed method is implemented, respectively, in machines for cleaning rod stock with a limited and unlimited length and for removing surface defects from black and color round stock.
  • a machine for cleaning rolled steel of unlimited length which implements the above method, includes: a housing consisting of two interconnected coaxial cylinders, each of which is mounted on a support conical left chamber and a similar right conical chamber, moreover, these chambers are directed large their diameters to each other, and between them a fixed chamber is formed (5). Both cameras are driven independently in opposite directions by means of variable speeds. Inside they are upholstered with an elastic coating.
  • a chute with a gate is mounted, which is connected through two side chutes and an ejector to a power distribution hopper, from which the fraction is transported to conical chambers mounted on bearings through the side fixed chambers of the two cylinders of the casing, in which there are built-in suckers for removal of exhaust particles (scale).
  • the machine presented above but for cleaning rod rolling with a limited length, here a hollow stationary chamber (5) with an increased width and between the two coaxial cylinders of the casing there is a regulating device with a carbide nozzle designed for guiding and stabilizing the rod rolling.
  • a multi-position machine for cleaning rolled products with a limited and unlimited length and for removing surface defects which implements a method and characterized by the fact that its body is composed of two-stage cylinders, and the same two-stage cylindrical part with a smaller diameter and a larger length is installed in it conical chambers with an angle ⁇ of a smaller cascade and an angle ⁇ of an expanding large cascade, moreover, in the connection zone of two-stage cylinders, the intermediate of the fixed chamber segments, in the walls of a large cylindrical cascade of the casing, an inlet and an outlet nozzle are mounted, through which the supplied rolling passes.
  • One of the advantages of the proposed invention is that the working shot is in motion over the entire cross section of the centrifugal force and the cutting edges of the shot are continuously updated along with the emission of waste particles.
  • the rolled metal undergoes additional processing from the side of the current layer in the direction of the rolled steel, and simultaneously with this, grains with updated cutting edges.
  • the rolling is subjected to additional massive processing from the side freed from two current centrifugal layers of the vortex flow, the opposite side being more intensively processed, and the renewal of pellets and cutting edges is total and carried out at high speed.
  • the method is applicable to all types of black and non-ferrous rolled products with a circular cross section and a minimum diameter of 4 mm and without technological restrictions for large diameters.
  • the rolled surface thus treated is distinguished by the greatest possible variety of micro-roughnesses.
  • a favorable relief is obtained for hydrodynamic lubrication during subsequent processing, by means of cold plastic deformation - stretching, calibration, etc.
  • the continuous movement of pellets, which can be polygonal or cylindrical in shape, and updating their cutting edges leads to another positive effect - self-correction and the appearance of new cutting edges, uniform erasing to a critical size and mass, after which they are absorbed (absorbed) by the filter system and this ensures 100% utilization of the fraction.
  • a continuous high-speed vortex flow and ejector fraction rotation further improve the heat balance of the system.
  • the most significant advantage of the method and the machine is its low energy consumption, which is a consequence of the high coefficient of efficiency - compared with, for example, shot blasting machines, it is 4 to 6 times lower with the same quantitative and qualitative indicators.
  • the advantage of the method and machines is their suitability for controlling parameters - the rate of flow and cutting of the layer, the vortex flow, its shape and pulsation, etc., through the use of modern electronic drives to fully optimize these parameters, including during continuous processes, when The machine is connected to modern exhaust machines.
  • Figure 1 shows a section through an IA machine for processing rolled steel with unlimited length
  • Figure 2 is a partial section through the execution of a machine for processing bar stock
  • Figure 3 Partial section of the multi-position processing of bar stock
  • Figure 4 Implementation of a multi-position machine for processing bar stock.
  • Fig. L shows an exemplary machine design for processing rolled steel of unlimited length.
  • the machine consists of a casing composed of two coaxial cylinders with flanges 12 and 13, each of which has a conical left chamber 6 with a rubber coating mounted and a conical right chamber 7 similar in shape to it coaxially with it, so that a stationary chamber 5 is formed between them.
  • conical chambers 6 and 7 are fixed to the housing using bearings 20 and 21 and have independent drives in opposite directions, using belt drives 19 and electric motors 31 and 32.
  • a groove 24 with a gate 25 is mounted in the lower part of the fixed stationary chamber 5, which, together with the grooves 26 and 27 and the ejector 15, is connected to the chamber 28, from which the fraction is transported in the loading and distribution hopper 16, after which the fraction is transported back to the conical chambers 6 and 7 through the grooves 10 and 11, mounted in the side fixed covers 29 and 30.
  • the latter also have suckers 8 and 9 for removing the spent particles to the filter system, (it is not shown in the figure), to which the particles of the scale from the installation for breaking the scale 33, which got into the bunker 34, are transported.
  • the machine shown in Fig. 1 works as follows: the rolled stock 1 passes with a certain speed V sequentially through the device for breaking the surface layer of scale 33, the inlet nozzle 35 and enters the centrifugal layer 2 of the conical chamber 6, flowing under the action of the force Px i in the direction of the passing rolling stock and flows into the periphery of the stationary chamber 5 and to its center 23, then passes through a mixed-concentrated vortex stream 4 and enters through the expanding part of the conical chamber 7 into the centrifugal layer 3, flowing under the action of the force Px 2 in the opposite direction in the opposite direction of the rolling movement and exits through the nozzle 36.
  • the stripping is approximately 160-180 °, and when passing through layer 3 of the chamber 7 with the opposite torque M 2, its front surface flows around it, stripping it with a large coverage - approximately 180-200 ° as a result of counter flow and clamping of the conical flow.
  • the distance L and the outflow velocity of the layers form a vortex stream 4, which flows around the entire rolled surface and further cleans it.
  • rapid placement of pellets is carried out and spent particles are shaken out of them, after which after loss of energy the fraction falls (due to gravity) into the groove 24 and is transported through the chamber 28 by the ejector 15 back to the loading and distribution hopper 16, and the spent particles from the middle spaces 17, 18 and 23 are discharged by suckers 8 and 9 and transported to the filtering system (it is not shown in Fig.
  • FIG. 2 shows a partial cut-off of a bar mill processing machine, which differs from that shown in Fig. 1 in that the stationary intermediate chamber 5, which is arranged between two chambers - 6 and 7, with a size L 1 , is significantly larger than L (in Fig. l) and in the middle between the flanges of the cylinders 12 and 13, an adjustable orienting-stabilizing device 37 is mounted with a carbide nozzle 38 mounted therein.
  • the action of the machine is as follows: rotating with M, the rolled rod is fed periodically by the feeding device through the inlet nozzle (not shown in the figure), passes at a speed lower than the feed rate of the first execution (Fig. 1) through the centrifugal layer 2, which is in the direction of the rental, and crossing it, as a result of the rotation of the rod over its entire surface, the first stage of processing is carried out.
  • the machine consists of a casing made up of two-stage cylinders 8 and 9, in which the same two-stage rotating conical chambers 6a and 7a with an angle ⁇ of a small cascade and an angle ⁇ of an expanding large cascade are installed in a cylindrical part with a smaller diameter and a larger length.
  • Both cylinders 8 and 9 are connected along the frontal parts of a large cylindrical cascade by means of pins 12, and between them a certain number of segments 13 are supplied for regulating the width L 2 , the stationary chamber 14 formed between them, defining the active zone of the vortex flows.
  • an inlet nozzle 10 and an outgoing nozzle 11 are mounted, through which the rolling passes with a certain speed V 2 and a rotation moment M 3 .
  • Figure 4 shows an exemplary embodiment of a three-position machine for processing bar stock.
  • the machine consists of a body composed of two-stage cylinders 8 and 9, a large cylindrical chamber 14 formed, the upper half of which is pierced at an angle of 90 ° by the rotating rods 1, Ia and 16 through nozzles 10 and 11 (Fig. 3). Thus, three working positions 17, 18 and 19 are formed.
  • a collecting and distribution chamber 20 which is connected by means of flexible pipes 23 and 24 to two ejectors 15, which connected by flexible pipelines 25 and 26 with the grooves 29 and 30 of the chambers 6a and 7a.
  • Loading bins 35 and 36 and suckers 33 and 34 are located on the side covers of the casing.
  • the conical chambers 6a and 7a are driven by controlled motors 31 and 32 using belt drives 19.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Cleaning In General (AREA)

Abstract

L'invention concerne un procédé et des machines de nettoyage de laminé de longueur limitée ou illimitée qui s'effectue au moyen d'une couche centrifuge de billes qui consiste à faire défiler le laminé à travers deux couches de mitraille mus par la force centrifuge et s'écoulant dans des directions opposées. Les fragments de mitraille ont une forme conique, les plus grands diamètres étant orientés les uns vers les autres. Un flux tourbillonnant est crée entre eux; on évacue de ce flux ininterrompu une partie de mitraille métallique et des parties de métal usées. La machine pour mettre en oeuvre ce procédé pour une longueur illimitée comprend un boîtier constitué de deux cylindres coaxiaux reliés entre eux (12, 13) qui comprend chacun (21, 22) une chambre conique gauche (6) et une chambre conique droite (7) possédant une forme analogue, leurs plus grands diamètres étant orientés les uns vers les autres. Une chambre immobile (5) est créée entre elles. Les chambres (6) et (7) se déplacent de façon indépendante dans des directions opposées au moyen de vitesses variables. L'invention prévoit également des variantes de la machine possédant une longueur de laminé illimitée et une machine à positions multiples destinée au nettoyage de plusieurs pièces de laminé en barres.
PCT/BG2008/000001 2007-01-25 2008-01-22 Procédé et machines de nettoyage de laminé WO2008089526A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BG109806A BG109806A (bg) 2007-01-25 2007-01-25 Метод и машина за почистване на прокат
BG109806 2007-01-25

Publications (1)

Publication Number Publication Date
WO2008089526A1 true WO2008089526A1 (fr) 2008-07-31

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BG (1) BG109806A (fr)
WO (1) WO2008089526A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175412A (en) * 1977-03-11 1979-11-27 Trefilunion Process and installation for mechanical descaling steel wire
SU1027020A2 (ru) * 1982-04-08 1983-07-07 Московское Ордена Ленина, Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Высшее Техническое Училище Им. Н.Э.Баумана Головка дл очистки абразивом наружной поверхности деталей
SU1159772A1 (ru) * 1983-06-09 1985-06-07 Запорожский Ордена "Знак Почета" Машиностроительный Институт Им.В.Я.Чубаря Способ формировани абразивной струи и устройство дл его осуществлени
DE4011585A1 (de) * 1990-04-05 1991-10-17 Tipom Vorrichtung zum zentrifugalen, hydromechanischen reinigen und polieren von rohlingen
RU2132249C1 (ru) * 1998-04-22 1999-06-27 Стазаев Владимир Николаевич Устройство для очистки проволоки

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175412A (en) * 1977-03-11 1979-11-27 Trefilunion Process and installation for mechanical descaling steel wire
SU1027020A2 (ru) * 1982-04-08 1983-07-07 Московское Ордена Ленина, Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Высшее Техническое Училище Им. Н.Э.Баумана Головка дл очистки абразивом наружной поверхности деталей
SU1159772A1 (ru) * 1983-06-09 1985-06-07 Запорожский Ордена "Знак Почета" Машиностроительный Институт Им.В.Я.Чубаря Способ формировани абразивной струи и устройство дл его осуществлени
DE4011585A1 (de) * 1990-04-05 1991-10-17 Tipom Vorrichtung zum zentrifugalen, hydromechanischen reinigen und polieren von rohlingen
RU2132249C1 (ru) * 1998-04-22 1999-06-27 Стазаев Владимир Николаевич Устройство для очистки проволоки

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Publication number Publication date
BG109806A (bg) 2008-11-28

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