RU2463121C2 - Method of producing electrically insulated metal band and line to this end - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to production of electrically insulated metal band for making insulated wires from foil to be used in transformers. Process is implemented in compact high-efficiency low-waste process line. To straighten metal band edges to square cross-section with burrs removal and reduction of lengthwise width variation, longitudinal cutting module has every first flat knife of twin set rigidly fixed on module bed while every disc knife is pressed thereto by every second flat knife by elastic rubber washer. Band drawing sizing module has drawing die made up of two bracket-shaped heads. Enameling module is provided with capillary squeezing rods. Lacquer drying and polymerisation or gelation module incorporates special-design through-drawing device to protect band edges.

EFFECT: higher accuracy of sizes and quality, increased metal filling.

2 cl, 16 dwg

Description

The invention relates to the field of electrical materials, namely the production of insulated foil wires for the manufacture of windings with a high duty cycle for metal.

Known combined methods for the manufacture of flat insulated electrical conductors by combining a metal foil with a dielectric layer [1], [2] followed by etching, longitudinal cutting and varnishing, as well as the deposition of metal on a dielectric layer, such as polyimide, chemically [3], plasma-chemical [4] , [5], gasdynamically [6] with the same subsequent processing. These methods allow the manufacture of multilayer flat wires, printed conductors and connecting cables with slight changes in the width of the metal strip of the flat wire along its length and with any constant or changing arrangement of layers. Strict constancy of the width of the metal strip is especially important when manufacturing capacitor plates and transformer windings from such a wire. Using these methods gives a relatively large thickness of insulation, providing electrical and mechanical strength with a small thickness of the conductor, which reduces the electrical capacitance formed with adjacent conductors. Since it is relatively thick, i.e. the structural supporting layer - the substrate, providing an acceptable mechanical strength of such a conductor, is a dielectric layer, then with such methods for the production of flat conductors and windings from them, a high relative filling in the metal in the wire is not achieved.

In the manufacture of transformers and capacitors, a method is known for isolating turns of foil windings of a transformer or twisted film plates of capacitors, based on the simultaneous winding by laying on top of each other separated layers of metal foil and dielectric film [7]. The method allows the use of simple easily accessible materials, i.e. long strips of insulation film and bare metal foil. However, if a wide range of widths of such tapes, foils, and metals with high electrical conductivity is required, the so-called technology for casting metal glasses with high-speed cooling, which is described in [8], [9] and ensures the production of a metal tape without burrs and width fluctuations, does not used because it provides only one tape width. Often in the production of flat wires and windings from flat wires, insulating film and metal foil tapes are used, made by rough longitudinal cutting of wide strips with a variation in the width of the tape along its length from ± 0.3 mm to ± 3 mm [10]. Such gross fluctuations in the width of the metal strip in the direction of its length create in the winding or lining edge protrusions on the lateral edges of some turns of the foil with respect to the lateral edges of its other turns, several times the thickness of the insulating film and metal foil. These sharp protrusions and burrs at the ends of the windings or plates significantly increase the strength of the induced or supplied electric field between the edges of these layers, as well as between them and the electrically conductive parts external to the winding or plate. This forces an increase in the thickness of the insulating tape and its width in the winding or lining in comparison with the width of the metal tape to increase reliability by reducing the likelihood of electrical breakdowns at the ends of these windings or lining, i.e. to increase additional protrusions of insulation at the ends, filling the voids arising in this case with insulating spirals, as indicated in the technologies of such windings and covers [11]. An increase in the thickness of the bearing layers, in this case both metal and insulating, also becomes necessary to exclude their damage during winding, which additionally leads to a decrease in the density of the windings and an increase in their size. The need for simultaneous winding in strips of two types also complicates the technological equipment.

Simple and inexpensive methods of insulation of an uncoated electric wire are widely known by extruding a plastic sheath or wrapping with a fiber or film dielectric [12], [13], [14]. Despite the fact that the carrier layer of such a wire is a metal layer, the use of these methods does not give, due to the large relative thickness of the insulation, a high relative filling of the wire with metal.

The known technology of insulation of an uncoated electric wire by enameling with varnishes [15] with a thickness of 30 μm to 120 μm, withstanding voltage up to 200 V, without which electrical engineering would be unthinkable. However, the viniflex, oil and polyester varnishes used in this case do not have sufficient electrical strength. In addition, the task of eliminating burrs and reducing fluctuations in the width of the tape along its longitudinal axis remains unfulfilled. Therefore, this technology also does not allow to reduce the thickness of the insulation and increase the relative filling of the wire and the winding with metal.

The following methods are known for thinning insulating layers:

1) methods of applying a continuous oxide layer on an uncoated or aluminized surface of the foil, for example, a layer of Fe ₂ O ₃ , Al ₂ O ₃ , TiO ₂ or TiN with high electric strength E _pr reaching 830 kV / mm [16], [17], [eighteen]. These methods easily provide a thickness of mechanically and electrically strong insulation, less than 1 μm, and these methods are carried out by using, for example:

- devices for microarc oxidation of metals and their alloys [19], containing a galvanic bath with a thyristor power source controlled by a computer with sensors of process parameters. The device provides consistently high quality coatings in a wide class of processed materials, however, it has a complex structure and low productivity;

2) the method of insulation of a flat cable with a polyimide-based polymer film of varnish [20], [21], in which, due to the high electric strength E _pr > 210 ... 270 kV / mm of these varnishes, the insulation thickness of the winding foil can be reduced to 2 ... 3 μm, which is achieved by diluting the varnish with rapidly evaporating solvents, the method being implemented using, for example:

- installations for coating an insulating varnish on a steel strip [22], containing a rotatable roller with a multi-cell surface partially immersed in a reservoir for a heated insulating varnish, rotating a smooth roller, pressing against a cylindrical surface with a cylindrical surface of a coaxial rotatable roller and with a varnish-coated surface. The device has high performance and provides uniform coating of the steel strip with thick varnish on all sides. The disadvantage of this device is the occurrence of uneven coating, if necessary, reduce its thickness to acceptable values and the possibility of damage to the strip due to constant lateral displacement during pulling;

- installations for applying varnishes to a moving metal strip [23], containing a coating roller mounted on a carrier slide with an adjusting device attached to them. Thanks to the supply of the roller to the moving metal tape with a certain force and in a certain installation position, uniform coating of a given thickness is ensured within narrow tolerance fields. However, the device does not allow to reduce the coating thickness to acceptable values;

- devices for coating by creating a meniscus of varnish [24], containing two vessels with varnish at different levels, connected by a strip of porous material impregnated with these varnish protruding above these vessels. The disadvantage of this device is the unevenness of the coating due to changes in the viscosity of the liquid varnish during operation.

In the process of processing the tape, devices for non-deforming rewinding and drawing along the processing line are necessary. In this case, the use of various lateral guides of the limiters can lead to damage to the insulation of the edge of the tape with a four-sided coating.

Known are the drawing unit of the drawing mill, the drawing method and the continuous drawing mill [25], comprising a fixed draw and with carts pulling along the frame of the mill, equipped with automatically controlled linear drives for moving along the rails of the guiding modules of the forward and reverse directions and alternately returned for coupling the metal to be drawn with modules of the locking element. The device provides a linear stretching of the rolled metal without damage from the side guiding devices, however, it has a complex and bulky design.

To ensure the required quality of the insulating coating of the wire, the line should also contain a device that provides washing the surface of the exposed tape from emulsion grease after it is dragged.

A known method of cleaning products with a solvent by placing products in a cleaning tank, supplying a liquid solvent with a shielding layer of water, cleaning the products with a solvent, removing the product and solvent from the cleaning tank, continuous regeneration of the solvent by evaporation by heat and returning the regenerated solvent to the cleaning tank; and a device for its implementation [26], containing a tank connected in series with a solvent, a tank for cleaning, a tank for spent solvent and a distillation apparatus for regenerating the solvent, the outlet of which is connected to the inlet of the tank for cleaning. The disadvantage of this device is its incompleteness to use for washing continuous tape.

A known installation for processing products with volatile solvents [27], comprising a sealed working chamber connected in series with a solvent supply and discharge system, a vacuum pump for removing air from the working volumes of the installation, an evaporator, a condensation unit, a solvent accumulator and an absorbing filter, the outlet of which is connected to the working the camera. The disadvantage of this device is also the incompleteness of its use for washing continuously stretched tape.

A washing device [28] is known that operates on the principle of multistage countercurrent cascade washing and chemical surface treatment by feeding the solution through nozzle pipes on both sides of the tape, and containing pumping devices and divided washing sections through which the washing liquid flows counter to the movement of the metal tape. The disadvantage of this device is its bulkiness, incompleteness and uneconomicalness and the associated complexity of its use for washing continuous tape in the production of flat wires.

Since in every known case, in addition to the shortcomings of the devices for applying insulating coatings, the task of eliminating burrs and reducing fluctuations in the width of the tape along its longitudinal axis, which further prevents thinning of the insulation layers, remains unfulfilled, the line for the manufacture of an electrically insulated metal tape should also contain nodes, providing the required quality of the side edges of the metal tape.

All known methods of continuous longitudinal cutting of a wide sheet of metal foil and dielectric film are based on the use of at least a single-row set for its longitudinal separation, selected from the following types of equipment:

1) mechanical scissors, guillotines or piercing knives, dies or rods with the reverse or vibrational movement of these tools [MKI B23D 15/00];

2) one- or two-roll scissors with smooth or serrated, roller or circular knives, with slow or fast rotation of the drive rolls with these knives, with an adjustable or unregulated direction and axis position, with pulled strippers [MKI B21B 37/00, B23D 16 / 06, B23D 19/00];

3) rotating mills or abrasive discs [MKI B23D 45/00];

4) abrasive or gear plates, tapes or threads with continuous, reversible or vibrational movement of this heated or unheated tool [MKI B23D 15/00];

5) planing, scraping or forcing cutters or abrasive rods [MKI B23D 15/00];

6) heated or not heated knives or sharp discs for forcing grooves on one or both sides of the foil [MKI B23D 15/00];

7) planing or punching incisors or disks with direct or alternating current applied to the foil separation point to soften, melt, evaporate or burn the foil at this point due to the high current density or due to a spark at this point, with or without a substrate for supporting the foil her [MKI B23D 19/04, B23D 19/06, B23D 33/02];

8) jets of gas or liquid of high pressure, including with abrasive particles, or high-speed flows of liquid or solid particles of piercing action [MKI B26F 1/26, B31B 1/18, D06H 7/04];

9) high-temperature gas, liquid or powder jets for melting with rinsing, with blowing, evaporation, sublimation or burning of the foil at the point of its separation, heated either from the inside by combustion of supplied vapors and gases, including termites, or by electric current, spark or arc, either pre-heated or externally by various methods [MKI B26F 1/26, B31B 1/18, D06H 7/04];

10) jets of chemically active and heated powders, liquids, vapors or gases for sublimation or burning of the foil at the point of its separation [MKI B26F 1/26, B31B 1/18, D06H 7/04];

11) heated disks, rods of chemically active materials, capillaries for supplying chemically active substances that react with the foil at the point of its separation, including rods and capillaries with applying electric current through an insoluble cathode, as well as termite rods [MKI B23D 15/00 , B23D 19/00];

12) chemical or electrochemical etching under a mask or screen with immersion in an active solution or melt, with the addition of this solution or melt by capillary, swab, spraying or dousing [MKI C23F 1/00, C23G 3/02];

13) high-intensity rays of various electromagnetic radiation, including coherent, for example laser, or sharp flows of high-density and energy particles, for evaporation of the foil at the separation point [MKI H01L 21/306];

14) electrodes in the form of disks, plates and wire for electrical discharge and spark cutting [MKI B23D 15/00, B23D 19/00];

15) devices for ultrasonic cutting with immersion in a liquid, in a stream or through a tampon, including with abrasive particles using a screen or with resonance at the point of separation of the foil [MKI B26F 1/26, B31B 1/18, D06H 7/04] ;

16) the thinnest jets of cold-liquefied liquefied gas, for example oxygen or nitrogen, and very promising devices for chipping fragile metal with shear, bending, pressure, vibration, impact, or for low-energy rapid grinding at the foil separation point {MKI B23D 15/00, B23D 19/00 ];

17) jets, capillaries or heated needles providing a touch of the foil at the point of separation with diffusing embrittling or dissolving material in the form of steam, solution, melt or in solid form, including using vacuum or protective gases or liquids with appropriate screens, and also devices for chipping, peeling, blowing off or suctioning the foil material changed at this point [MKI B26F 1/26, B31B 1/18, D06H 7/04].

In accordance with the current level of technology, the means for longitudinal cutting of foil, the simplest, most efficient and best ensuring the quality of cutting, are mechanical cutting devices (section 2 of the listed methods of cutting or separation), for example:

1) a unit for slitting a roll of material [29], containing an unwinding device, a guide roller enveloped by the material, disc scissors installed sequentially in the direction of movement of the roll material, while one end of the guide roller is pivotally fixed and connected to the angle sensor, as well as a position sensor edges of the material, and the outputs of both sensors are connected to the block for adjusting the position of the edge of the material. The presence of a system for automatically controlling the position of the edge of the material on its way from unwinding to cutting allows you to get cutting lines parallel to the tracked edge. The shafts of the unit are constantly self-adjusting so that the foil web cannot move away from the desired direction of its broaching. This saves longitudinally cut foil, and with high precision control and single-line cutting of highly stretched foil reduces the variation in the width of the resulting tape to the required values. However, when cutting a wide web, and especially multi-row knives, due to the convexity of the initial wide web of foil, a crescent of the tape and variations in its width arise, sometimes even waviness or corrugation of the edge of the tape appears. The crescent shape of the tape is easily compensated for in the manufacture of finished products, but the disadvantages associated with burrs and variation in the width of the tape remain;

2) a device for the longitudinal cutting of rolled material [30], containing two parallel rolls mounted on a bed with disk knives on the first of them, a drive for their rotation, spring rings between these knives and support rollers on another roll. The elastic pressing of the ends of the disk knives of one roll to the thrust rollers of the oncoming roll provides a reduction in the size of the burrs, however, this decrease does not ensure that their permissible limit is equal to ± 0.25 μm. The variation in the width of the tape is also preserved;

3) a device for the longitudinal cutting of material [31], containing the feed and pressure drums mounted on the bed and having annular slots on their cylindrical surfaces into which flat knives mounted on the bed are inserted. The dense elastic pressing of the knives to the edges of the slots provides high quality cutting, however, the size of the burrs still exceeds the required limit. The variation of the width of the tape also exceeds the specified tolerance.

Obviously, the reasons for the variation in the width of the finished tape associated with the inevitable convexity of the original web and the uneven tension arising from these bulges do not compensate for any of the known devices for longitudinal cutting of the foil web that does not have additional devices (B21D 1/00, B21D 5/06 ) to eliminate this already arisen shortcoming, i.e. dies, dies or other crushing, scraping or draining devices, not heated, heated, without or with current, vibrations, lubricating and etching emulsions and solutions. Taken separately: chemical [32], electrochemical [33], [34], plasma-chemical [35], and all other known etching methods can only remove burrs, but do not eliminate inconstancy of the tape width to acceptable values, for example, to the required ± 0.25 microns along its entire length.

Since squeezing the tape can cause wrinkling and other undesirable changes in its shape, then to obtain the correct rectangular cross-sectional shape of the tape without bent burrs, the dimensions of which are beyond the specified tolerance, and without variations in width that go beyond their specified tolerance, you can only use the dragging of the straightening and scraping actions. To do this, dies are required for dragging a metal strip cut along a metal tape without crushing and tearing it, which could be used to obtain the correct rectangular cross-sectional shape of the tape with a strictly calibrated width and to remove burrs.

A known method of processing metals [36], which consists in applying current and creating an ultrasound resonance in the perimeter of the entrance of the drawing gap of fibers or deforming disks. The method increases productivity and improves the quality of tacking, reduces tool wear, because significantly increases the compliance of the processed material. However, to maintain a smooth mode of such active dragging, the introduction of special equipment for powering and automatic control of such a device is required; therefore, the use of such a die complicates the device and reduces its reliability. Due to the instability of the process of activating the properties of the processing perimeter, which depends on random changes in the properties of the material, the drawing does not ensure the evenness of the edges of the material.

To solve the problem, a composite die for drawing rectangular profiles [37] is more acceptable, containing C-shaped working liners pressed against each other by flat contacting surfaces, resting on the opposed surfaces of the wedge and clips and forming the working channel. The dragging ensures the absence of protrusions and marks on the surface of the profile. However, the drawing can not be used to correct the edges of a metal tape, because having a large friction surface with a wide edge of the tape, creates a tension when drawing enough to break a relatively thin tape.

A known method of manufacturing an uncoated strip of nichrome and similar alloys [38], based on the receipt of the ingot, hot and cold sheet rolling of the ingot into sheets or strips and their separation by longitudinal cutting into finished strips, or based on hot high-speed rolling of the ingot into a strip billet of a rectangular cross section for drawing in riots, reusable ripping drawing of the obtained workpiece to a finished strip with high profile accuracy on a single-strand drum drawing mill with intermediate annealing follows the passage of each drawing, and final softening annealing of the finished strip. The method and line for its implementation make it possible to produce a ribbon wire with acceptable characteristics, however, it does not eliminate the breakage of this wire due to the increased tension from friction in the fibers.

A known method for the production of bare wire from coiled material [39], based on the butt welding of the ends of the rolls, slitting on multi-row scissors on a wire of approximately square section, drawing to give the wires a round cross-section, calibration to a given diameter, winding the finished wire on a multi-line winding device line production of bare wire from rolled material and a line for its implementation [39]. They provide a reduction in the breakage and unevenness of the winding of wires by a multi-row winding device, which is also a traction body during drawing, but they do not allow the wire to be made in the form of a metal tape without burrs and variations in width above the established tolerance.

The closest technical solution is a method for producing wire from coiled material [40], including butt welding of the ends of coils, slitting on multi-row scissors onto wires of approximately square section, drawing to give round wires and calibration to a given diameter, winding the finished wire onto multi-row winding the device and the production line of uncoated wire from rolled material [40], containing sequentially located unwinder for rolled material, butt welding machine, roller straightening device, tape drive, multi-row disc shears for slitting, abrasive wire processing unit consisting of rotating cylindrical abrasive tools and roller systems, die block and receiving winding device consisting of multi-section drums and a guiding mechanism. By reducing the tension of the wire, the line has high reliability and low breakage of the wire, and thanks to the guide mechanism ensures the straightness of the tape and the evenness of its winding on the receiving drum. However, this method of wire production and the line for its implementation do not allow the wire to be made in the form of metal strips without burrs and variations in width over the established tolerance.

Thus, using these methods and devices, it is not possible to reduce the insulation thickness and increase the relative filling of metal wires and windings to acceptable values.

The objective of the invention is to provide the possibility of manufacturing an electrically insulated metal tape with a wide range of its width and thickness, to increase the accuracy of the geometric dimensions of the tape, the quality of the tape, increasing the relative filling of the metal on the tape and its products.

The technical result is the straightening of the edge of the metal tape to a rectangular cross-section with the removal of burrs and a decrease in the width fluctuations in the direction of its length, thinning and uniformity of the dielectric insulation layer.

To do this, in a method of manufacturing an electrically insulated metal tape, comprising:

unwinding with a roll drive of the fed wide foil web and its first pulling with tracking of its edge and regulation of the pulling direction with the help of the guide shaft, which ensures low waste and uniformity of feeding the foil web for its cutting;

longitudinal cutting of the foil web onto the tapes of the established width with circular toothed knives with elastic pressing of their planes to the planes of the oncoming knives with overlapping, which ensures reduction of burrs during cutting;

calibration of the tape by dragging the tensioned workpiece to obtain a rectangular cross-section, completely eliminating burrs and width variations, with the supply of lubricating fluid to reduce friction when dragging;

washing the processed tape with a counter flow of hot solvent mixture with its regeneration for reuse;

applying a thin electrical insulating oxide, ceramic or glass enamel coating to the surface of a calibrated metal strip by chemical and electrochemical deposition and oxidation, electrophoresis, microarc formation of a ceramic layer, using microarc sintering of a layer consisting of low-melting and refractory inorganic microparticles obtained by electrochemical deposition conductive suspension;

enameling with varnish to reduce the thickness of the insulation while maintaining its high quality by wetting all sides of the processed metal tape by means of capillary materials;

drying and polymerization or gelatinization of varnish with ventilation;

pulling the processed metal tape through sequentially located modules for calibrating the tape by dragging, washing, applying an electrical insulation coating, varnish enameling, drying and polymerization or gelatinization of varnish;

standard filling of the front edge of the processed metal strip through all modules of the line;

winding the finished electrically insulated metal tape onto the sleeve of the receiving shaft, tracking the edge of the finished tape and adjusting the direction of the axis of the receiving shaft to ensure reliable packaging of the finished tape;

additionally introduced the following operations:

during longitudinal cutting of the foil web - tension, correcting the convexity of the web, and rigid fixation of flat counter knives to the module bed, and these measures reduce fluctuations in the width of the processed metal tape;

when calibrating the tape by dragging - use a rectangular collapsible fiber and act only on the edges of the stretched processed metal tape, while the fiber is freely moved in the direction of the width of the tape, which reduces friction and the effect of crescent, and therefore eliminates the breakage of the processed metal tape;

in case of lacquer enameling - finishing alignment of the lacquer layer with a capillary squeezing rod with an adjustable elastic clamp to the processed metal tape;

when pulling the tape in the drying and polymerization or gelatinization module of the varnish - use the device for through-pulling the processed metal tape with adjustable vacuum in vertical and horizontal tubes and attach the midpoint of the tape to the vertical tubes only at the location of the horizontal tubes of the device with tracking edges of the processed tape and regulation of the line of its through drawing, which eliminates damage to the edges of the processed tape and insulation on them when givane.

To achieve a technical result of the invention, in a production line for the continuous manufacture of an electrically insulated metal strip, including:

a feed module for installing and unwinding the feed roll of the original wide sheet of non-insulated metal foil, which contains a support rack with a drive and a lock for installing the feed roll and connecting the drive to the sleeve of this roll; a web tension sensor that closes the power supply circuit of the drive, and controls the presence of the supplied foil, connecting the power supply circuit of the entire production line; the first guide roller, the axial ends of which are pivotally mounted on the platforms of the parts of the rotation drives relative to the longitudinal axis of the production line and the rotation relative to the vertical, these drives being connected via a multi-channel relay amplifier-comparator with optical sensors for positioning the edge of the web, and the foil web envelopes the guide roller;

a module for longitudinal cutting of a foil web into ribbons of a fixed width, which contains a second guide roller, the axis of which is mounted on bearings of the module bed, enveloped by a foil web and connected by a roller moving drive along the axis to correct the location of the foil edge, the drive inputs being connected to the outputs of the amplifier-comparator the inputs of which are connected to the outputs of the optical sensors installed along the edge of the foil; a pressure roller coated with a layer of rubber, and a traction roller, the axis of which is slipping connected to a low-speed drive; a shaft with a set of spring-loaded serrated circular knives located between the rollers and connected to a high-speed drive, the knives overlapping with the oncoming knives and elastically pressed against them by the ends; a device for lubricating and cooling the foil;

the calibration module by dragging the processed metal tape, which contains a roller, the axis of which with bearings is mounted on the frame of the module, enveloped by the processed metal foil tape; a pressure roller coated with a rubber layer and a traction roller enveloped by a metal foil to be processed by a tape and having an axis coupled to slip with a drive; a lubricant device and a rectangular die located in series between the rollers;

a module for washing the processed tape with a counter flow of hot solvent mixture, which contains a sealed chamber with elastic inlet and outlet slots for passing the processed metal tape; nozzle pipes with a heater located on both sides of the processed tape for washing off contaminants from its surface, alternating with wiping felt or brush couplings; a vacuum pump, connected by pipes to the filtration and regeneration chamber of the washing mixture, connected to nozzle pipes for the closed use of this mixture, as well as a system of three rollers covered by the processed tape and allowing the tape to be immersed in the chamber fluid;

a module for applying an electrical insulating coating to the surface of a calibrated metal strip, which contains a bath with an electrolyte emulsion, equipped with three rollers installed in the bath and covered by the processed metal tape, with an electrode system for applying the initial layer by a chemical, electrolytic method and / or electrophoresis with a power source and with a system of electrodes for microarc oxidation and burning of an oxide compound with a power source and with a tracking control device;

a varnish enameling module comprising upper and lower rollers with an elastic coating, fixed to the module bed and covered by a processed metal tape; tanks with diluted varnish, equipped with wicks adjacent on both sides to the processed metal tape; a tight chamber and with narrow slots that do not touch the edges of the processed tape, in which all the components of the module are located; moreover, the hole in the bottom of the chamber is connected to a gas-liquid centrifugal pump, to the second input of which a tank with a mixture of varnish solution is connected, and the output is connected to the inlets of the tanks;

a module for drying and polymerizing or gelatinizing the varnish, comprising a sealed chamber with narrow inlet and outlet slots not touching the edges of the surface of the processed tape; hair dryers located inside the chamber, a device for blowing chemically active gases or vapors, infrared or ultraviolet irradiators; exhaust ventilation device of an external degassing system;

a finished metal tape winding module comprising a support rack with a slipping drive and locks for installing a receiving sleeve and connecting a drive to it; a length counter for a finished electrically insulated metal strip connected to a drive switch; rotation drives relative to the longitudinal axis of the production line and rotation relative to the vertical, on the platforms of which the locks are pivotally mounted for mounting the receiving sleeve, the drives being connected via relay amplifiers to optical sensors for tracking the edge position of the finished metal strip,

The following changes have been made:

in the slitting module: the clamping and traction rollers are pressed against the sides of the processed metal tape; oncoming knives are made flat, and their number is twice as large as the number of serrated circular knives, with each first flat pair set knife rigidly fixed to the module bed, and each circular knife pressed against it by every second flat set pair knife with an elastic rubber washer;

in the calibration module by dragging the tape: a rectangular die is made of two staple-shaped heads forming grooves, the input section of which covers the stretched processed tape at a distance from its edge, sufficient to hold it while removing burrs, the final correction of the width and rectangular cross-sectional shape, and the heads are mounted on a holder that rests freely, resting on the side of the demolition tape on the stop of the module bed, and has the ability to freely move in the width direction of the processed tape, in this case, each of the heads is made in the form of carbide plates tightened together by screws with corrugation from the side facing this tape, perpendicular to the direction of its movement, and with a gap whose size is determined by a reference insert having an equal thickness with the processed tape;

the lacquer enameling module additionally includes: capillary squeezing rods horizontally located on the processed tape with the possibility of its sliding relative to each rod and the oncoming clip to the processed tape using adjustable elastic clamps mounted on the module bed and located after the wicks in the direction of movement of the processed tape;

a through-drawing device located after the sealed chamber is introduced into the drying and polymerization or gelatinization module of the varnish, comprising vertical tubes with adjustable air rarefaction, lower support rollers installed to support the processed tape, a chain made in the form of a thick tape with slots and mounted on star wheels mounted on the ends of the driven shaft and the twisting shaft, and the twisting shaft is equipped with a sliding low-speed drive, while the circuit is installed with by the location of its straight segment above the middle line of the processed tape, the vertical tubes are installed in the chain tape with the same pitch along its length, between the slots of the chain tape, with the possibility of suctioning the processed tape to vertical pipes, in each of which two pairs of through holes are made, facing internal and external surfaces of the chain tape, each vertical pipe equipped with a bell, a wide opening of which is located at the level of the processed tape and is equipped with a solid fine mesh installed with the possibility of its location in parallel with the processed tape, a bracket on which the driven and rotating shafts are mounted that can be moved in the direction of the width of the processed tape, equipped with corrective low-speed drives, which are connected to high-current outputs with three logical states of relay amplifiers-comparators connected to optical position sensors of one of the edges of the processed tape, two pairs of guide rails made in the form of horizontal tubes with adjustable m with rarefaction of air and located on the bracket, with the possibility of adhering to the tape of the chain from the side of its internal and external surfaces, while in horizontal tubes, at the level of two pairs of through holes of vertical tubes, slotted inlets are made with the possibility of connection with holes of vertical tubes, and the outlet of each horizontal tube is connected to a pump with an adjustable air pressure introduced into the through-drawing device.

The invention is illustrated by drawings, where figure 1 schematically shows a line for the continuous manufacture of an electrically insulated metal tape; figure 2 shows the feed module for installing and unwinding the feed roll of the original wide web of uninsulated metal foil; figure 3 is a module for the longitudinal cutting of the foil web into tapes of a fixed width; figure 4 shows a section aa in figure 3; figure 5 is a cross-section bb in figure 3; figure 6 is a section CC in figure 3; figure 7 shows the calibration module by dragging the processed metal tape; Fig.8 is a rectangular dragging; Fig.9 is a section D-D in Fig.8; figure 10 shows the module washing the processed tape counter flow of a hot solvent mixture; 11 is a module for applying an insulating coating to the surface of the processed metal tape; on Fig - module varnish enameling; on Fig - module drying and polymerization or gelatinization of varnish; on Fig - through pulling device; on Fig - vertical tube with a fine mesh on the bell; on Fig - module winding finished metal tape.

The line for the continuous manufacture of an electrically insulated metal strip contains serially connected:

1 - feed module for installation and unwinding of the original wide web of metal foil,

2 - module for the longitudinal cutting of the foil web into tapes of a fixed width,

3 - calibration module by dragging the processed metal tape,

4 - module washing the processed tape counter flow of a hot solvent mixture,

5 - module for applying an insulating coating to the surface of the processed metal tape,

6 - module varnish enameling,

7 - module drying and polymerization or gelatinization of varnish,

8 - module winding finished metal tape.

The feed module 1 for installing and unwinding the feed roll 9 of the original wide sheet of metal foil, schematically depicted in figure 2, contains a support rack 10 with a drive 11 and a lock 12 for installing a feed roll 9 and connecting the drive 11 to the sleeve of this roll; a sensor 13 for web tension and monitoring the presence of the supplied foil, connecting the power circuit of the entire production line; the first guide roller 14, the axial ends of which are pivotally mounted on the platforms of the rotation drives 15 relative to the longitudinal axis of the production line and rotated relative to the vertical, and these drives 15 are connected via a multi-channel relay amplifier-comparator 16 to the optical sensors 17 of the edge of the web, and the foil sheet envelopes the guide movie 14.

The module 2 for longitudinal cutting of the foil web into ribbons of a fixed width, which is schematically shown in FIG. 3, contains a second guide roller 18, the axis of which is mounted on the bearings of the module 2 frame, enveloped by the foil web and connected by the drive 19 to move the roller 18 along the axis to correct the location the edges of the foil, and the inputs of the drive 19 are connected to the outputs of the amplifier-comparator 20, the inputs of which are connected to the outputs of the optical sensors 21 installed along the edge of the foil; a pinch roller 22 coated with an even layer of rubber, and a traction roller 23, the axis of which is slipping connected to the low-speed drive 24; moreover, the clamping 22 and traction 23 rollers are pressed against the sides of the processed metal tape; a shaft with a set of spring-loaded gear disk knives 25, located between the rollers 18 and 23, connected to a high-speed drive 26, and the knives 25 overlap with the oncoming knives 27 and are elastically pressed against them by the ends; a device 28 for lubricating and cooling the foil; counter knives 27 are made flat (see Figs. 4 and 5), and their number is twice as large as the number of serrated circular knives 25, each first flat knife 29 of a pair of counter knives 27 is rigidly fixed to the frame of module 2, and each circular knife 25 is pressed against him every second flat knife 30 pair of oncoming knives 27 using an elastic washer 31 made of rubber.

The calibration module 3 by dragging the machined metal tape schematically shown in FIG. 7 contains: a roller 32, the axis of which is mounted on bearings of the module 3 with bearings, bent around the metal foil being processed by the tape; a pinch roller 33 coated with an even layer of rubber, and a traction roller 34, enveloped by the metal foil being processed by the tape, and the axis of which is connected to slip with the drive 35; located in series between the rollers 32 and 34, the lubrication device 36 and the rectangular die 37, schematically shown in Fig. 8, made of two bracket-shaped heads 38 forming grooves, the input section of which covers the stretched processed tape at a distance from its edge, sufficient to hold it when elimination of burrs, final correction of the width and rectangular shape of the section; moreover, the heads 38 are mounted on a holder 39, which freely lies and abuts against demolition by the tape against the stop 40 of the bed of the module 3 and has the possibility of free movement in the width direction of the processed tape; each of the heads 38, as schematically shown in Fig. 9, is made in the form of carbide plates 41, 42, 43 tightened together by screws with corrugation from the side facing this tape, perpendicular to the direction of its movement, and with a gap, the size of which is determined by the reference liner 44 having equal thickness with the processed tape.

The module 4 for washing the processed tape with an oncoming flow of hot solvent mixture, which is schematically shown in FIG. 10, contains a sealed chamber 45 with elastic inlet and outlet slots 46 for passing the processed metal tape; nozzle pipes 47 with a heater 48 located on both sides of the processed tape to wash off contaminants from its surface, alternating with wiping felt or brush couplings 49; a vacuum pump 50, connected by pipes to the chamber 51 for filtering and regenerating the washing mixture, connected to the nozzle pipes 47 for closed use of this mixture; as well as a system of three rollers 52, covered by the processed tape and providing immersion of the tape in the fluid of the chamber 45.

The module 5 for applying an electrical insulating coating to the surface of the processed metal strip, schematically shown in FIG. 11, contains a bath 53 with an electrolyte emulsion with an electrode system 54 for applying the initial layer by a chemical, electrolytic method and / or electrophoresis with a power source 55 and with an electrode system 56 for microarc oxidation and incineration of the oxide compound with a power source 57 and with a follow-up control device 58, while the bath has three rollers 59 installed in the bath 53 and covered processed metal tape.

The varnish enameling module 6, which is schematically depicted in FIG. 12, comprises an upper and lower resiliently coated rollers 60 fixed to the base of the module 6 and covered by a processed metal tape; diluted lacquer reservoirs 61 provided with wicks 62 adjacent on both sides to the metal strip to be processed, as well as capillary squeezing rods 63 horizontally located on the strip to be slidable relative to each rod and counter-pressed to the strip to be processed on both sides with adjustable spring clips 64, mounted on the base of the module 6 and located after the wicks 62, judging by the direction of movement of the processed tape; an airtight chamber 65 with narrow slots 66 not touching the edges of the processed tape, in which all the components of module 6 are placed, the hole in the bottom of the chamber 65 is connected to a gas-liquid centrifugal pump 67, to the second input of which is a tank 68 with a mixture of varnish solution, and the output is connected with tank inlets 61.

The module 7 drying and polymerization or gelatinization of the varnish, schematically shown in Fig.13, contains a sealed chamber 69 with narrow inlet and outlet slots 70, not touching the edges of the surface of the processed tape; hair dryers 71 located inside the chamber 69, a device 72 for blowing chemically active gases or vapors, infrared or ultraviolet irradiators 73; exhaust ventilation device 74 of the external degassing system, as well as a device 75 through the pulling of the tape located after the chamber 69.

The belt pull-through device 75, shown schematically in FIG. 14, comprises a chain 76 worn on sprocket wheels 77 mounted on the ends of a driven shaft 78 and a rotating shaft 79 with a sliding low-speed drive 80; an arm 81, on which bearings 78 and 79 are attached, equipped with corrective low-speed drives 82, moving them in the direction of the width of the processed tape, the drive circuit 82 being connected to high-current outputs with three logical states of relay amplifiers-comparators 83, controlled by optical position sensors 84 one of the edges of the processed tape; from the outside, vertical tubes 85 are mounted in the chain 76 with the same pitch along its length, not protruding from the thickness of the chain 76, through the upper holes in each of which are facing both surfaces of the ribbon of the chain 76, and the lower one ends with the bell 86 shown in FIG. 15, the wide opening of which is at the level of the processed tape and is covered with a mesh 87; horizontal tubes 88 mounted on the bracket 81, located at the level of the upper through holes of the vertical tubes 85, parallel to the movement of the processed tape and clamping a long length of chain 76 located above the middle line of the processed tape, and the inlet of the horizontal tubes 88 is made in the form of a gap along the entire their length, pressed to the chain 76, and the outlet is connected to the suction pump 89 with an adjustable vacuum; lower support rollers 90 supporting the stretch tape.

The finished metal tape winding module 8, which is schematically depicted in FIG. 16, comprises a support rack 91 with a slipping drive 92 and locks 93 for mounting the receiving sleeve 94 and connecting the drive 92 to it; rotation drives 95 relative to the longitudinal axis of the production line and vertical rotation, on the platforms of which the locks 93 are pivotally mounted for mounting the receiving sleeve 94, the drives 95 being connected via relay amplifiers 96 to optical sensors 97 for tracking the position of the edge of the finished metal strip; a counter 98 of the length of the finished electrically insulated metal strip connected to the drive switch 92.

The inventive method is implemented in a technological line for the continuous manufacture of an electrically insulated metal strip.

The feed module 1 provides the feed of the initial metal foil web with a uniform tension over time. The foil tension τ _{f is} monitored by the sensor 13: if it is greater than the specified maximum value of τ _{f max} , then the sensor 13 closes the power supply circuit of the drive 11, which through the lock 12 will begin to rotate the roll 9, installed by the ends of its sleeve on the bearings of the lock 12 of the rack 10, starting from the specified speeds ω _f with gradual acceleration until the foil tension is equal to τ _{f max} and the resulting speed is maintained; if the foil tension is less than the specified value τ _{f min} , then the sensor 13 turns off the actuator 11, which, through the lock 12, slows down and stops the unwinding of the foil roll 9. This eliminates the influence of the inertia of the roll 9 and during operation of the production line provides a uniform linear speed ν _{f of the} foil without jerking and sagging. In the absence of foil, the sensor 13 opens the power supply circuit of the entire production line. Optical sensors 17 monitor the position of the edge of the foil at two spaced apart points. If the foil is shifted to the right of the specified line of movement of the edge equally at both points, the relay amplifier-comparator 16 includes raising the right side of the drive 15 until the edge coincides with the specified line, creating a one-time tape offset. If the right edge offset prevails at the input point of a given line, i.e. the foil as it is unwound further should shift to the left, the amplifier-comparator 16 includes a right turn of the right part of the drive 15, creating a one-time offset and tilt as a prerequisite for returning to the initial state when drawing the tape; and if the right bias prevails at the output point of the given line, it includes a left turn of the right side of the drive 15, creating a one-time bias and tilt as a prerequisite for further bias in the same direction when pulling the tape. Similarly, the position of the edge is adjusted when it is shifted to the left of the specified line by the left part of the drive 15. This ensures the movement of the edge of the supplied foil strictly along the specified line.

Module 2 provides a longitudinal cutting of the incoming wide sheet of foil into tapes of a given width. The foil blade enters the module 2, covering the guide roller 18. If the position of the foil edge does not coincide with the specified line, then according to the signals of the sensors 21 supplied to the input of the amplifier-comparator 20, the output voltage of the corresponding polarity supplied to the drive 19 is turned on. providing a single axial movement of the roller 18, combining the edge of the foil with a given line. This ensures the efficiency of module 2. Rigid foil pulling through module 2 with a given speed ν _f characteristic of the entire production line is provided by a traction system 23 and pressure 22 rollers, which together with the guide roller 18 create a foil tension τ _f sufficient to eliminate its bulges commensurate with the width of its canvas. This is one of the measures to eliminate the zigzag drift of the width of the finished tape. The cutting process is carried out by circular knives 25, clamped with overlapping set of counter knives 27 and rotated by a drive 26 with an angular velocity ω _k >> (ν _k / r _k ), where r _k is the radius of the circular knife 25, average with respect to its teeth, as shown in Fig.6. The high speed ω _k and the corresponding knife sharpening angles 25 even without an elastic platform for the axis of these knives reduce undesirable deformations due to the uneven tension of the foil and reduce burrs during cutting. Rigid fastening of the knife 29 of the pair of oncoming flat knives 27 to the base of the module 2 and the compression of the gear knife 25 by the second knife 30 of the pair of knives 27 with a rubber washer 31 provide an additional reduction in fluctuations in the width of the finished tape and an additional reduction of burrs during cutting. The serrated shape of the knives, providing continuous cutting according to the principle of conventional scissors, reduces the effort spent on cutting. Polished smooth ends of the knives of sets 25, 27 and lubrication by the device 28 reduce friction during cutting, reducing wear on the cutting edges of the edges of the knives. The angled bevels of the knives 27, as shown in figure 4, facilitate the loss of flake that occurs when cutting the foil. The possibility of strong cooling of the foil by the lubrication and cooling device 28 immediately at the time of cutting also reduces burrs by increasing the fragility of the foil. The remaining crescent of the tape, i.e. simultaneous identical smooth bending of both edges of the tape with a period ten times greater than its width, with a constant width of the tape, is quite acceptable to achieve the specified accuracy of the tape width as a result of its further single dragging. Sickle usually occurs when cutting a sheet with bulges resulting from rolling, for example, aluminum foil. A foil, for example, copper or iron, made by depositing an even titanium drum on a cylindrical surface, does not have such bulges.

Module 3 provides calibration by dragging a stretched workpiece tape to obtain a rectangular cross section, completely eliminating burrs and fluctuations in its width. The rollers 32, 33, 34 create a tension τ _{d of the} processed foil tape, sufficient for its smooth, without crushing, passage through the die 37; moreover, the sliding drive 35 through the roller 34 provides translational movement of the tape with a speed ν _f . Before drawing, the tape is wetted with a lubricating fluid by means of the device 36, and due to the fact that the heads 38 of the rectangular wire 37 cover the edges of the tape to a shallow depth, i.e. act only on the edges of the tape, and the so-called floating wire, freely moving perpendicular to the tape, tracks its crescent shape, drawing occurs without tearing the tape. Corrugations on carbide inserts 41, 42, 43, facing the processed tape, provide its finishing. When adjusting the die 37, its width is controlled by moving the heads 38 on the holder 39, and the gap size for the tape of the selected thickness is controlled by the reference gasket 44.

Module 4 provides the washing of the metal strip being treated from organic and inorganic contaminants in a stream of heated washing solvent suspension that is in opposition to the tape movement. At the same time, random corrosion spots and residues of soap and grease suspension deposited on the tape in modules 2 and 3 are removed from the surface of the tape. A solvent-water-vinegar-acetone mixture with the addition of kitchen detergents that remove corrosion spots is used for washing. Spray of the heated suspension through nozzle pipes 47 irrigate the surface of the metal strip being treated, which is cleaned of the main types of contaminants by friction through the couplings 49. The contaminated suspension is collected on the bottom of the chamber 45 and, together with the solvent vapor, is pumped out by a centrifugal pump 50 into the chamber 51 for filtration and regeneration . This ensures the economy of module 4. The calibrated tape exiting module 4 has a clean, smooth, flat surface with high adhesion ability.

Module 5 provides a durable electrical insulating oxide, ceramic or glass-enamel coating on the surface of a calibrated metal tape. Using electrodes 54, an initial oxide or mixed layer of refractory oxide particles and low-melting complex compounds is deposited on the surface of the tape. Then this layer is subjected to a system of electrodes 55 microarc sintering or fusion with burning into the surface of the processed metal strip. The process is monitored and controlled by system 518. Depending on the chemical composition of the initial layer and the microarc mode, a durable electrically insulating layer of oxides, ceramics, or glass enamel (glaze) is obtained on the surface of the processed tape.

Module 6 is designed for applying a thin (1 ... 3 μm) uniform high-strength insulating enamel coating on all four sides of the metal strip to be processed, for example, polyimide, sugar-starch or other polymerizable or gelatinizing varnishes. The horizontal arrangement of the processed tape additionally prevents the formation of further varnish smudges on its surface. Diluted varnish made by dissolving the selected resin with the appropriate dye and additives, for example, emulsion of temperature-resistant nanoparticles, using felt-tip felt wicks 62 is uniformly applied to the surface of the processed tape. Dilution of the varnish reduces the thickness of the coating due to its drying. Further, as shown in FIG. 12, the stretchable tape extends between the capillary squeezing rods that are in opposite contact with the surface of the tape on both sides thereof. According to the practical results obtained, when a thin even rods 63 touches a processed metal tape moistened with varnish, a capillary layer forms between the tape and the rod, the self-stabilizing thickness of which does not change when the tape slides relative to the rod 63. This method of dispensing by capillary alignment can further reduce the thickness and improve uniformity of the varnish layer. The thickness of the varnish layer is adjusted by choosing the ratio of solvent and resin to change the viscosity of the varnish at the selected speed of the processed tape and pressure by spring clips 64. The tightness of the chamber 65 prevents premature change in the viscosity of the varnish due to evaporation of its solvent. The dripping varnish pressed by the rods 63 and its vapors are pumped by a low-performance centrifugal pump 67 together with fresh solution from the tank 68 to the reservoirs 61 of the module 6. The rods 63, like slides sliding on the surface of the processed tape, have a slight viscous friction to its movement. The springs 64 also compensate for the influence of the weight of these rods 63 on the vertical displacement of the tape. When enameling wide metal tapes, several counterpairs of rods 63 are used, arranged in a row across the width of the tape.

Module 7 provides drying and polymerization or gelation of a thin layer of varnish uniformly applied to all surfaces of the processed metal strip. In the evaporation zone with phenes 71, the solvent evaporates from the varnish layer, and the thinnest (1 ... 3 μm) uniform capillary retained layer of high viscosity varnish remains, which is almost no longer affected by gravity, and the compressive surface forces do not have time to overcome the adhesive viscous forces and change uniform thickness of the varnish until it is fully polymerized or gelled. In the zone of gas or vapor treatment devices 72, for example halogens, the polymerization of the thickened varnish layer is activated. In the extended zone of the irradiators-heaters 73, the complete polymerization or gelation of the varnish enamel takes place. Pulling the processed metal strip through the modules 4, 5, 6, 7 is carried out by the device 75 through pulling (Fig), using the chain 76 of the device. Horizontal tubes 88 play the role of straight strictly guiding rails, with little effort adjacent to the chain 76 from its inner and outer sides on a straight segment of the chain 76, located above the middle line of the processed tape. Since the through upper openings of some vertical tubes 85 pass between the horizontal tubes 88 during the considered period of time, due to the operation of the air centrifugal pump 89 with adjustable air pressure in these vertical tubes 85, an air pressure is created that presses the stretch tape to them. When the vertical tubes 85 exit from the connection with the horizontal tubes 88, the vacuum circuit is opened and the vertical tubes 85 are disconnected from the stretched metal tape. For the cost-effectiveness of the device, the remaining cross-section of the trough-shaped inlet openings of the horizontal tubes 88 not connected with the openings of the vertical tubes 85 is covered by a flat surface of the chain 76. The two-sided contacting of the vertical tubes 85 with the horizontal tubes 88 eliminates the increase in friction between them that would have arisen during one-way contact. Since the stretch tape does not sag due to the support rollers 90, the through-pull device 75 is stable. A solid fine-mesh mesh 87 on the sockets 86 of the vertical tubes 85, parallel to the plane of the stretched tape, eliminates its crushing when sucked by the vertical tubes 85. Such a strong, but sparing contact of the through-pull device 75 with the processed tape by areas remote from its edges excludes its crushing and what Any damage to the electrical insulation of the tape. Optical sensors 84 located at the ends of the through-pull device 75 track the position of one of the edges of the stretch tape relative to a predetermined line. The deviation signal is amplified by the comparator amplifier 83 and, through its three-stable (-1.0,1) high-current output, turns on the corresponding reversible drive 82 for the duration of the signal elimination. Smooth pulling of the processed tape excludes its deformation and other damages.

Module 8 of the winding of the finished metal tape provides reception and winding of the tape of a given length into smooth rolls without crushing and damage to the insulation. This is ensured by guide drives 95, amplifiers 96 and sensors 97, which work similarly to guide drives 15, amplifiers 16 and sensors 17 of the supply module 1, since the finished electrically isolated foil is a delicate vulnerable product, special protective packaging is required for its transportation and storage.

The order of the first refueling of the roll 9 of the foil in the production line is as follows. The roll 9 is installed in the rack 10 and secured by its locks 12. Towards the end of the foil web 9, the ends of the clean coarse tuning tape foils are fixed with tape, the width and thickness of which does not exceed the width and thickness of the tape, which will be made on the production line. Tapes are pulled through all modules of the processing line and their second ends are fixed on the tuning drum, which is installed in module 8 of the winding of the finished tape instead of the receiving sleeve. The production line is turned on without filling the tapes into the die 37 of the calibration module 3 by dragging, with the washing module 4 turned off, the electrical insulating coating module 5 turned off, the varnish enameling module 6 turned off and the varnish drying and polymerization or gelatinization module 7 turned off, and the foil is stretched until it appears on the output of module 3 in the form of a bare, not yet calibrated tape. From this moment on, it is easily refueled into the heads 38 of the die 37 of the tape calibration module 3 by dragging. Next, each module of the processing line is switched on as it passes through a newly refilled tape. At the time the expected tape appears on the tuning drum, it is replaced by a receiving sleeve. When the production line is turned off by the signal of the sensor 13 due to the lack of foil, the beginning of the foil strip of the next roll 9 is attached to the end of the foil strip of the previous roll 9. The junction of the foil is passed through the tape calibration module 3 by dragging without refueling in the die 37.

Non-touching the edges of the tape while adjusting its direction during drawing through the modules of the processing line eliminates the possibility of deformation of these edges and destruction of insulation on the edges of the tape.

Obviously, when using calibrated enameled foil with a constant width along its entire length, the ends of the windings are obtained without protrusions and burrs. A slight technological backlash between the turns, usually not more than 0.5% of the thickness of the enameled foil, eliminates the tendency of the winded tape to form protrusions at the ends of the winding due to its crescent shape, and also allows for additional alignment of these windings by soft crimping after winding to eliminate winding technological errors. Therefore, in the operating mode, the electric field strength at all points of the end face of the winding or lining will have a small and unchanged value, which allows to reduce the insulation thickness and to exclude an additional increase in insulation at the ends. Due to this and an increase in the density of the winding when using high-quality enameled tape obtained by the proposed technology, the sizes of the windings and plates made of foil are significantly reduced.

In the manufacture of the inventive production line, the same materials can be used that are used in the manufacture of the known analogues listed, namely stainless steel in the manufacture of modules 4, 5 and 7, black tool steel in the manufacture of modules 1, 2, 3, 6, 8 .

The inventive production line can be used in the manufacture of windings, plates and current rails with increased bulk current density. However, the main field of application of electrically insulated metal foil manufactured on this equipment, and due to this having the necessary characteristics, is the production of windings of new generation electromagnetic transformers [41].

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Claims (2)

1. A method of manufacturing an electrically insulated metal tape, including unwinding a roll of foil web and its first pulling with tracking its edges and adjusting the direction of pulling using a guide shaft, slitting the foil web onto tapes of a set width with circular toothed knives with elastic pressing of their planes to the oncoming planes knives with overlapping, calibration of the tape by dragging with a supply of lubricating fluid, washing the tape with a counter flow of hot solvent mixture with a regenerator mixture, deposition of an insulating layer on a tape using chemical and electrochemical deposition and oxidation, electrophoresis, microarc sintering of a ceramic layer consisting of low-melting and refractory inorganic microparticles obtained by electrochemical deposition and electrophoresis in an electrically conductive suspension, lacquer enamel coating with all sides by lacquering with , drying and polymerization or gelatinization of varnish, pulling the tape during calibration by dragging, washing electrical insulation coating, varnish enameling, drying and polymerization or gelatinization of varnish, with the front edge of the metal strip being processed through all the line modules and winding of the finished electrically insulated metal strip on the receiving shaft sleeve with tracking of its edge and adjustment of the axis of the receiving shaft, different the fact that it additionally includes during longitudinal cutting of the foil web - the operation of tensioning and rigidly fixing flat counter knives to the module bed, with gauge Swinging the tape — using a rectangular collapsible wire and acting only on the edges of the stretched processed metal tape, the wire being freely moved in the direction of the width of the tape, with varnish enameling - the finish alignment of the varnish layer with a capillary squeezing rod with an adjustable elastic clip to the tape, while stretching the tape while it is drying and polymerization or gelatinization of varnish - use of a device for through pulling of a processed metal tape having vertical and rizontalnye tubes with adjustable suction air therein, by which portions are attached to the tape centerline vertical tubes in place of the horizontal tubes of said location tracking device treated tape edge and adjusting its line through broaching. 2. A line for the manufacture of an electrically insulated metal strip, comprising a feed module for installing and unwinding a feed roll of an initial wide sheet of non-insulated metal foil, comprising a support rack with a feed drive and a lock for installing a feed roll and connecting the feed drive to the sleeve of this roll; a web tension sensor and control of the presence of the feed foil, closing the power circuit of the feed drive and connecting the power circuit of the entire production line, the first guide roller, the axial ends of which are pivotally mounted on the platforms of the rotation drive parts relative to the longitudinal axis of the production line and rotation relative to the vertical, through a multichannel relay amplifier-comparator with optical sensors for positioning the edge of the web, and the foil web envelopes the first guide p olik, a module for longitudinal cutting of a foil web onto tapes of a fixed width, containing a second guide roller, the axis of which on bearings is mounted on the module bed, enveloped by a foil web and connected by a roller moving drive along the axis to correct the location of the foil edge, and the drive inputs are connected to the outputs of the amplifier a comparator, the inputs of which are connected to the outputs of the optical sensors installed along the edge of the foil, a pressure roller coated with a layer of rubber, and a traction roller whose axis is slipping oedinena with low-speed drive shaft with a set of spring-loaded toothed disc knife located between the guiding and driving rollers connected with a high-speed drive, wherein the circular knives overlap with opposing planar knives and elastically pressed against the ends of them; a device for lubricating and cooling the foil, a calibration module by dragging the processed metal tape, the first roller, the axis of which is mounted with bearings on the module bed, enveloped by the processed metal tape, a pressure roller coated with a layer of rubber, and a traction roller enveloped by the processed metal tape and having an axis coupled to slip with the drive; a lubricant device and a rectangular die located in series between the first and traction rollers; a module for washing the metal strip to be processed by the counter flow of hot solvent mixture, containing a sealed chamber with elastic inlet and outlet slots for passing the metal strip to be processed, nozzle pipes with a heater located on both sides of the metal strip to be washed to remove dirt from its surface, alternating with rubbing felt or brush couplings, a vacuum pump, connected by pipes to the filtration and regeneration chamber of the washing mixture, connected to with optical tubes for the closed use of this mixture, and a system of three rollers covered by the metal strip being processed and immersing it in the chamber fluid, an electrical insulating coating module on the surface of the aforementioned tape, containing a bath with electrolyte emulsion, having an electrode system for applying the initial layer with a chemical by method and / or electrophoresis with a power source, with a system of electrodes for microarc oxidation and burning of an oxide compound from a source a power supply unit and with a follow-up regulating device, while the bathtub is equipped with three rollers installed in it and covered by a processed metal tape, a varnish enamel module containing upper and lower rollers with an elastic coating, mounted on the module bed and covered by a processed metal tape, tanks with diluted varnish, equipped with wicks adjacent on both sides to the processed metal tape, an airtight chamber with narrow slots that do not touch the edges of the processed tape in the swarm contains all the components of the specified module, while the hole in the bottom of the chamber is connected to a gas-liquid centrifugal pump, to the second inlet of which is connected a tank with a mixture of varnish solution, and the outlet is connected to the inlets of the tanks, the module for drying and polymerization or gelatinization of varnish, containing a sealed chamber with narrow entrance and exit slots that do not touch the edges of the surface of the processed tape, hair dryers located inside the chamber, device for blowing chemically active gases or vapors, infrared or ultraviolet irradiators, an exhaust ventilation device of an external degassing system, a finished metal tape winding module containing a support column with a slipping drive and locks for installing a receiving sleeve and connecting a drive to it, a length counter of a finished electrically insulated metal tape connected to the drive switch, rotation drives relative to the longitudinal axis of the production line and rotation relative to the vertical, on the platforms of which the locks are pivotally fixed for installing the receiving sleeve, m rotary drives are connected via relay amplifiers with optical sensors for tracking the position of the edges of the finished metal tape, characterized in that in the slitting module, the pressure and traction rollers are mounted with the ability to press against the sides of the processed metal tape, and the number of counter flat knives is twice as many as the number of serrated circular knives , in this case, each first flat knife of a pair of sets is rigidly fixed on the module bed, and each disk knife is installed with the possibility of pressing against it the second flat knife of a pair of sets using an elastic washer made of rubber, in the module for calibrating the tape by dragging the rectangular die is made of two staple-shaped heads forming grooves, the input section of which covers the stretched processed tape at a distance from its edge, sufficient to hold it while removing burrs, the final correction of the width and rectangular shape of the cross section, with the heads mounted on a holder that is freely located, resting on the stop of the module bed on the side of the tape demolition, and has the possibility of free movement in the direction of the width of the processed tape, each of the heads being made in the form of three hard-alloy plates tightened together by screws with corrugation from the side facing the tape, perpendicular to the direction of its movement, and with a gap, the size of which is determined using a reference insert having equal thickness with the processed tape, capillary squeezing rods, horizontally located on the processed tape with the possibility of collisions relative to each rod and counter pressure to the processed tape using adjustable elastic clamps mounted on the module bed and located after the wicks in the direction of movement of the processed tape, a through-drawing device located after the sealed chamber containing vertical pulling is inserted containing vertical tubes with adjustable air discharge, lower support rollers installed with the possibility of supporting the machined metal tape, a chain made in the form of a thick tape with slots and mounted on star wheels mounted on the ends of the driven shaft and the twisting shaft, and the twisting shaft is equipped with a slipping low-speed drive, while the chain is installed with the possibility of placing its straight segment over the middle line of the processed metal tape vertical tubes are installed in the chain tape with the same pitch along its length, between the slots of the chain tape, with the possibility of suction of the processed metal tape to the vertical pipes, each of which has two pairs of through holes facing the inner and outer surfaces of the chain tape, each vertical pipe having a bell, a wide opening of which is located at the level of the metal strip being processed and equipped with a solid fine-mesh mesh installed with the possibility of its location parallel to the metal strip being processed, the bracket, on which the driven and rotating shafts are mounted with the ability to move in the width direction of the metal strip to be machined, is provided corrected low-speed drives, which are connected to high-current outputs with three logical states of relay amplifiers-comparators, connected to optical position sensors of one of the edges of the processed tape, two pairs of guide rails made in the form of horizontal pipes with adjustable air discharge and located on the bracket, with the ability to fit to the chain tape from the side of its inner and outer surfaces, while in horizontal pipes, at the level of two pairs of through holes vert -local tubes, input slots formed to be connected to vertical tubes with holes and the outlet of each connected to a horizontal pipe inserted in a through broaching pump device with adjustable air underpressure.

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