Measuring roll for detection of strip flatness defects (versions) and method of detecting strip flatness defects

FIELD: process engineering.

SUBSTANCE: proposed measuring roll comprises, at least, one measuring bar resting on transducers built in roll outer surface. Note here that measuring bar is composed of strip tension measuring bar for determination of strip tension temporal process and extends, in fact, along circular contour in one preset zone of roll circular contour. In compliance with another version, said bar extends inclined to roll axis and extends on one side along one preset width zone and, on opposite side, along one preset zone of roll circular contour. Flatness measuring bar comprises, at least, one strip tension measuring bear as reference measuring bar. Note here that flatness measuring bar is used for measuring one voltage signal depending upon time and describing width coordinate. Note also that reference measuring bar is used to measure one reference time-dependent signal irrespective of width coordinate and describing strip temporal process. Note that reference signal is filtered from tension voltage signal for determination of strip intrinsic tension process.

EFFECT: higher accuracy of measurement.

7 cl, 6 dwg

 

The invention concerns a measuring roll to determine defects in the flatness of the tape and/or to determine the belt tension at the tape, in particular metal strip, with at least one integrated into the shell of the roll, respectively, in the outer surface of the roll measuring beam, which is supported on the sensors, for example, elements of measurement efforts, preferably the piezoelectric elements. The invention also concerns a measuring roll to determine defects of flatness in the strip, respectively, to determine the flatness of the tape, in particular metal strip, with at least one integrated into the shell of the roll, respectively, the outer surface of the roller beam measuring flatness, which is supported on one or more, preferably two sensors, and passes obliquely to the axis of the roll so that it passes through, on the one hand, one given zone width, and on the other hand, one defined area of the circuit loop, respectively, the area of the angle of rotation of the roll. Such a roll measuring flatness can be provided by several beams measuring flatness, distributed across the width of the tape, which respectively overlap a specific area of the width of the measuring roll, respectively, of metal strip and lie if necessary, one ID is notchnoi area of the circuit loop, respectively, the area of the angle of rotation. Thus, preferably each beam measuring flatness supported by several sensors, for example, two sensors, which are located, for example, in the areas of the ends of the beam. The sensors are made preferably as sensors measurement efforts, such as piezo transducers measurement efforts. The invention encompasses, however, and forms of implementation with other sensors.

Such roller measuring flatness measured flatness defects in strips, particularly metal strips, during measurement of the stress distribution of the tension of the tape across the width of the tape, and the tape is located across the width of the tape under tension tape, covers a swath measuring flatness with a fixed angle setting and consequently attaches to the roll position measuring flatness local efforts pressing respectively the local stress distribution in the longitudinal tension in the direction of the width of the tape, from which it is possible to record the distribution of the tension belt tension. From the stress distribution of the tension of the tape across the width of the tape is then possible to directly determine the defects of the tape and, in particular, waviness, respectively stabilnosti tape, as by differences in voltage tension represented by longitudinal variations in individual strips of tape.

Swath measuring flatness described first type is known, for example, from DE 102004008303 A1. This roll measuring flatness, respectively, two measuring beams integrated into the shell of the roll diametrically opposite and tied to each other pulls on the rod. Each of the measuring beams supported on the sensor measurement efforts. Owing to such arrangement as sensors can be used, in particular a piezoelectric quartz elements with the preliminary clamping without what should be taken into account, the power of parallel connection, as pre-loading, the inertial forces and the weight of the efforts of the measuring beams can be compensated through a diametrically opposite location.

Famous rolls measuring flatness turned out to be principally suitable, they are still eligible for improvement. So, essentially there is a problem that the measuring beams measured voltage tension on one particular coordinate of the width of the tape, which is obtained from applying its own voltage tape, on the one hand, and the tape tension. Therefore, the tape will be sent to the roll position measuring flatness always with one of the specified belt tension. Temporary fluctuations in the belt tension can lead in this case to the distortion of measurement results. Although it would be PR is tsipialjno possible to register the tension of the tape as a separate device, depending on time, so as to generate a corrective function. However, it is associated with high costs. Because measuring belt tension is measured, for example, conventional strain gages (load-cells") in the area of the bearing supports of the roll, often may not have enough dynamic range. It incorporates the invention.

However, you know the platen with two pressure sensors in the form of strips on the outer surface of the roller, and pressure sensors located in the Central zone of the roller and lie essentially along the direction of the circumferential contour of the roller. The pressure sensors detect an inorganic material with piezoelectric properties. This kind of cushion is an integral part of the printing machine, in which two roller restrict printing gap (compare DE 10329430 A1). On the development of the measuring roll to determine the belt tension and, in particular, the measuring rolls to determine defects in the flatness of the tape, in particular metal strip, this kind of development had no effect.

The basis of the invention is a measuring roll which is able to measure the time course of tension the belt, simple and accurate way. In particular, should be created swath measuring flatness to detect defects of flatness, respectively, to determine the flatness of the tape in ar is th tape, in particular a metal strip, which has a high measurement accuracy. When this temporary fluctuations in the belt tension should not have a negative impact on the results of measurement of flatness.

To address this problem, the invention shows the corresponding category of the measuring roll, that the measuring beams as the beams of tension measuring tape to determine the time course of the belt tension lie essentially along the direction of the regional circuit, one defined area of the circuit loop. Particularly preferably, the invention shows the corresponding category of the roll measuring flatness mentioned in the beginning of that beam measuring flatness attached to at least one beam of measuring belt tension as the reference (reference) measuring beams, which are also supported on the one or more sensors and to determine the time course of the belt tension lies, essentially, respectively exclusively in the direction of the regional circuit in one defined area of the circuit loop. The invention proceeds from the accumulated experience that temporary fluctuations in the belt tension, which are superimposed on the signals of the measuring beam for measuring the flatness, it is possible to compensate in a simple and particularly precise manner, if the swath dimension PL is scotnet is not only equipped with one or more arranged obliquely to the axis of the roll beams measuring flatness, but moreover has at least one reference (reference) of the measuring beam, which runs exclusively in the direction of the County circuit and, therefore, not inclined to the axis of the roll, but located essentially perpendicular to the axis of the roll respectively along the direction of belt movement. Since this reference (reference) beam is, therefore, only a single coordinate by the width of the tape, this reference signal does not depend on the differences in its own tension in the tape width of the tape, but solely from the (total) belt tension according to its time course.

Reference (reference) of the measuring beam emits, therefore, temporary fluctuations in the belt tension. Because these temporary fluctuations in the belt tension imposed on the signals of the measuring beam flatness measuring flatness, it is thus possible to filter out the impact of temporary fluctuations in the voltage of the tension in the tape from the signal of the measuring beam of the measuring flatness. In the framework of the invention it is possible in a particularly precise manner, since the reference signal representing the tension of the tape, taken at the same time as its own signal measuring flatness. Thus provided is particularly high measurement accuracy.

Thus the invention offers in particular before occhialino improvement, that reference (reference) beam lies essentially on the same area of the circuit loop and, therefore, the area of the angle beam measuring flatness, respectively as beams measuring flatness. Taking into account the fact that the beam measuring flatness are inclined to the axis of the roll, therefore, the reference (reference) beam to a predetermined value is shorter than the beam measuring flatness, so that the beam of measuring flatness, on the one hand, and the reference (base) of the measuring beam, on the other hand, run through the same area of the angle of rotation, respectively, the area of the circuit loop. This leads to the fact that synchronously can be allocated, on the one hand, the signal measuring flatness accordingly, the signal voltage tension, and on the other hand, the reference signal measurement and always to each continuous curve measuring flatness there soamsawali reference curve measurements, which covers the same period of time, so maybe accurate filtering of possible fluctuations in the belt tension.

According to another proposal, provided that the beam measuring flatness is located approximately in the middle of the roll (relative to the width of the roll). In this case, it is advantageous if both sides of designated reference and measuring beams is soo who are responsible, at least one beam for measuring the flatness or even several beams measuring flatness.

Predominant in the framework of the invention is that the beam of measuring the flatness may be run over a relatively large area of the circuit loop and, consequently, over a relatively large area of the angle of rotation of the roll. This area of the circuit loop, respectively, the area of the angle beams for measuring the flatness of a famous redirect measuring rolls kept still relatively small, because with increasing angle area of the district circuit amplifies the problem of temporary voltage fluctuations in the belt tension. Due to the invention of compensation temporary voltage fluctuations in the belt tension, now within the framework of the invention can be worked with beams measuring flatness, which cover a relatively large area of the angle of rotation. In practice, this constructively, especially predominantly possible to realize due to the fact that one beam measuring flatness is composed of a large number of directly to each other adjacent to and located on one straight line segments of the beam, which, for example, supported respectively on the two sensor measurement efforts, spaced from the ends. So fundamentally there who is very useful to create a single one measuring beam, which is made up of a large number of components of the measuring beams, which are, so to speak, in the form of spirals, respectively, in the form of a helical line on the district circuit and across the entire width of the tape. Then in this case it is advantageous if in one area of the roll is at least one designated reference and measuring beams, which also runs across the area of the angle of rotation, so that always turns out perfect compensation of fluctuations in the belt tension.

The object of the invention is also a method of determining defects in the flatness of the tape, respectively, determine the flatness of the tape, in particular metal strip, with the roller for measuring the flatness described species, and through the beam measuring flatness measured signal voltage tension depending on time, represents the coordinate along the width, and using a reference (reference) measurement of the beam is measured in a time-dependent reference signal is independent of the coordinates, width and represents the time course of the belt tension, and whereby the reference signal is filtered out of the signal voltage tension to determine the progress of their own voltage. It is possible, for example, due to the fact that the own signal voltage representing its own voltage and, therefore, defects of the coefficients, is determined by coordinates in width by forming the difference between the signal voltage tension, on the one hand, and a reference signal, on the other hand.

The above explanations make clear that the one corresponding to the invention the beam of measuring belt tension is particularly preferably used as a reference (reference) measurement beams in combination with one inclined beam measuring flatness in one felling measuring flatness. The main function of such a roll measuring flatness is determining defects of flatness measurement by measuring the voltage distribution of the tape width of the tape, with the beam measuring belt tension assumes the function of designated reference and measuring beams, so that the measurement signal can filter out temporary fluctuations in the belt tension. The invention encompasses, however, another aspect of these forms of implementation of the measuring roll, which do not work as roll measuring flatness, and serve as a roll of measuring belt tension and "only" determine the time course of the tape tension in the tape and, in particular, a metal tape. In this form of implementation is not provided by the beam measuring flatness, passing obliquely to the axis of the roll, and only one of the multiple beams measuring belt tension, which lie along a certain coordinate width (exclusively) in the direction of the County circuit and, therefore, not inclined to the axis of the roll, and are essentially perpendicular to the axis of the roll respectively along the direction of belt movement. This beam measuring belt tension corresponds, therefore, in terms of design and functions already explained designated reference and measuring beams without further provided, nevertheless, beams measuring flatness. Through such a roll measuring belt tension beams from the measuring belt tension is possible, therefore, simple and very accurate way to measure the time course of the tape tension in the tape, aimed at measuring the roll position, and, in particular, a metal tape. Measuring roller has a high accuracy and, in particular, a high dynamic range.

However, the invention also covers the implementation of the roll measuring flatness, which is combined to one beam of the measuring belt tension respectively designated reference and measurement beam described species with items measuring flatness, but of another kind, for example, with items measuring flatness, which are made not as a measuring beam, and work, for example, as denicdirect measurement, distributed across the width of the roll and/or circumferential contour of the roll.

Below the invention is explained more with the aid of drawings representing only one embodiment. Show:

figure 1 - swath measuring flatness, in the first form of implementation, in the top view,

figure 2 is a modified form of the object of figure 1,

figure 3 - the fragments of the cross-section of the object of figure 1 in the area beam measuring flatness,

4 is a modified form of the object 3,

figa-e - schematically, corresponding to the invention a method of determining defects of flatness,

6 is a measuring roller in the form of implementation as a roll of tension measuring tape to determine the time course of the belt tension.

Figure 1-5 in the first form of the invention presents swath measuring the flatness of 1 to detect defects of flatness in the metal tape 2, respectively, to determine belt flatness of metal strip 2. This swath measuring flatness 1 could be integrated into the manufacturing line for the ribbon accordingly technological line for tape or line rolling mill. Swath measuring flatness 1 can be located before and/or is after, for example, processing device of the tape, for example, a rolling mill is, crate training or expanders. Tape 2 over the entire width In is under a given tension of the tape and, therefore, under tension-tension and covers a swath measuring flatness 1 with a fixed angle setting δ from, for example, 2° to 10°, preferably 2°-5°. Determination of the flatness of the tape, respectively, the definition of flatness defects, is relevant to the invention roller measuring flatness "indirectly", by measuring the voltage distribution of the tension of the tape across the width of the ribbon Century For this swath measuring flatness has several beams measuring flatness 3A, 3b, integrated into the shell of the roll, respectively, in the outer surface of the roll, and each beam measuring flatness 3A, 3b in the embodiment supported on two sensor 4, which in the exemplary embodiment is designed as a sensor measurement efforts. With these sensors we can talk about piezoelectric quartz elements. In particular, figures 1 and 2 we can see that the beam measuring flatness 3A, 3b are oriented obliquely to the axis of the roll, so they are, on the one hand, one given zone width b, and on the other hand, one defined area of the district circuit U1, and the area of the circuit circuit U1 corresponds to a specific angle. During the operation of the enta 2 covers a swath measuring flatness 1 angle setting δ and consequently making local efforts clicking beams to measure the flatness 3A 3b respectively, moreover, these local efforts clicking depend on the coordinate along the width of the tape. With the turning of the roll measuring flatness 1, on the basis of the inclined arrangement of the beam of measuring flatness 3A 3b respectively, continuously changes the coordinate along the width of the tape so that one beam measuring flatness 3A 3b respectively continuously measuring the stress distribution belt tension on one particular area of the width of the tape.

In practice, random temporal fluctuations of the tension imposed on the distribution of stress tension, caused by the influence of the flatness of the tape, which is measured over a certain period of time, as the measurement is made for different coordinates along the width of the tape to different points in time. In order to compensate for frequent temporary voltage fluctuations belt tension corresponding to the invention swath measuring flatness 1 has along with well-known on its own beams measuring flatness 3A, 3b, optionally, at least one reference (reference) beam 5. This reference (reference) beam, which is represented in figure 1 and 2, is now not as beams measuring flatness 3A, 3b inclined to the axis And roll, and it takes place essentially in the direction of the district circuit (top view) perpendi warno axis And the roll, that is, along the direction of belt movement BR respectively parallel to the direction of belt movement BR. Reference (reference) of the measuring beam 5 is, therefore, one (only) coordinate by the width of the tape so that it forms one reference signal independent of variations in its own voltage across the width of the tape, but independent of temporal fluctuations in the belt tension. For this reference (reference) of the measuring beam 5 is also supported on the sensors, for example sensors measurement efforts, namely accordingly, as the beam measuring flatness 3A, 3b. Figures 1 and 2 can be seen that the reference (base) of the measuring beam 5 passes through the area of the district circuit U2, which corresponds essentially to the area of the circuit circuit U1, which passes a beam measuring flatness 3A, 3b. Reference (reference) of the measuring beam 5, on the one hand, and a beam measuring flatness 3A, 3b, on the other hand, are, therefore, for the same zone district circuit U1=U2 and, consequently, for the same area of the angle α, so what exactly are taken, on the one hand, one (dependent on width) signal measuring flatness S - through measuring beams for flatness 3A, 3b and the (independent from the width) of the reference signal R - by reference (reference) measurement of the beam 5. With the Edom at this in this case, it may be desired compensation to those that the reference signal R representing a random time fluctuations of tension, are filtered from the signal measuring flatness S. For this purpose it is recommended to refer to figure 5, a-E.

Figa first shows, again schematically, comprising the region of the roll measuring flatness 1 with inclined located beam measuring flatness 3A and the reference (base) of the measuring beam 5, which is coupled with the beam measuring flatness 3A. Beam measuring flatness runs through the area of the circuit circuit U1, and hence the area of the angle of rotation α0α1and the zone width b0-b1. Reference (reference) of the measuring beam 5 is located on an ongoing coordinate in width, and runs on the same zone district circuit U2=U1 and, consequently, in the same way for the same area of the angle of rotation α0α1. During rotation of the roll 1 zone angle α0α1traversed in the time range from t0to t1.

Fig.5b shows, for example, on the one hand, the voltage signal of the tape S, which is formed from the beam measuring flatness 3A, and on the other hand, the reference signal R, which is formed from a designated reference and measuring beams 5, namely for the first case is perfectly flat belt, with, however, during the measurement, meet temporary talebanisation tape. These fluctuations in the belt tension finds expression, on the one hand, in the voltage signal of the tape S, and on the other hand, in the reference signal R. By forming the difference obtained is presented in figure 5, with own signal voltage E, which in this example is constant, i.e., the voltage does not vary in a given zone of the width of the tape so that there are no defects in the tape.

In contrast, figure 5, d and 5 e show a second example for nonideal flat belt, welcome once again meet temporary fluctuations in the belt tension during measurement. Figure 5 d shows the voltage signal of the tape S, measured with the beam measuring flatness, and the reference signal R, measured by reference (reference) beam, and figure 5, e shows the differential signal D=S-R, which is the voltage E is varied in this example, the width of the tape.

Therefore, it becomes clear that using designated reference and measurement beams and through appropriate compensation becomes possible to precisely define the flatness of the tape without that measurement is distorted by temporary voltage fluctuations tension.

In the embodiment, one reference (reference) of the measuring beam 5 is located approximately in the middle M of the roll. On both sides of this is designated reference and measuring beams 5 are respectively one or more beams for measuring the flatness 3A, 3b. In the form of realization of figure 1 with the two sides from the reference (reference) beam 5 are respectively two beams measuring flatness 3A, arranged obliquely to the axis And roll. In contrast, figure 2 shows the form of realization, in which the two sides from the reference (reference) beam 5 are respectively only one beam measuring flatness 3A. These beams measuring flatness 3A, as well as the reference (reference) beam 5 according to figure 2, run on the larger area of the angle of rotation, and therefore, the area of the circuit loop of the roll than beams according to figure 1. For constructional reasons, it may be expedient, in this form of implementation of figure 2 each of the measuring beam 3A, 3b, and each of the reference (reference) beam 5 to be composed of multiple segments 3' 5' beam, and in the formation of beams beam segments are joined to each other while out in a straight line behind each other. Each segment 3' 5' beam itself, in turn, can be supported on several sensors measuring the force of, for example, two sensors measuring the force placed on the ends. Details not represented in figure 2.

Finally, figure 3 and 4 show a possible alternative design-build redirects the measuring roll and, in particular, design the s beam measuring flatness. Thus, there can be used known construction, which, for example, described in DE 102004008303 A1 or so in DE 102004003676 A1.

Figure 3 shows the preferred form of realization, in which two beams measuring flatness 3A and 3b are diametrically opposite each other are integrated into the shell of the roll and through one Central drive rod 6 is pulled with each other respectively mutually. Each of the beams measuring flatness 3A, 3b supported on two sensor measurement efforts 4. Via a Central drive rod 6 sensors measuring the force of pre-cut. Thus the compensation pre-load as inertial efforts accordingly the weight of effort, so that the work without power parallel connection (see DE 102004008303 A1).

Alternatively, according to figure 4, can also be made with rolls measuring flatness, which with the help of screws 7 is fixed on the roll, and these screws 7, for example, can pass through the annular sensors measuring the force 4.

The design presented in figure 3 and 5, there comes beams measuring flatness 3A and 3b. Designated reference and measuring beams 5 can be fixed respectively tightened, however, an identical or similar manner.

In t is as Fig.1-5 shows the measuring roller in the form of implementation as a roll measuring flatness with oblique measurement beams, on the one hand, and on the other hand, with reference (reference) measuring points 5, 6 refers to the measurement of Valka in the form of implementation as the roll measure belt tension. This roll of measuring belt tension in the shell of the roll, respectively, in the outer surface of the roll integrated one measuring beam, is made as beams 5A measuring belt tension, and these beams 5A measuring belt tension - as well as the reference (reference) of the measuring beam 5 according to figure 1-5 - lie exclusively in the direction of the County circuit and, therefore, not inclined to the axis of the roller and parallel to the direction of belt movement. In this form of implementation of the refuse passing obliquely to the axis of the roll beams measuring flatness, since this measuring roller should be used as swath measuring flatness, and "only" as a swath of measuring belt tension. Beam 5A measuring belt tension is (roughly) in the middle of the roll. Therefore, the measuring roller is now possible to accurately determine the temporal fluctuations in the belt tension. Figure 6 thus indicated that the beam 5A measuring the tension of the tape passes around the entire circumference of the roll, so that by measuring the roll can be continuously measured. The measuring beam may be a construct of the VNO built as described in figure 1-5 of reference (reference) measurement beams 5 / or beams measuring flatness 3A, 3b. Structurally offered, if the beam 5A measuring belt tension is made up of several segments of the beam, and each segment of the beam, in turn, itself based on several sensors measuring the force of, for example two, sensor measurement efforts, spaced from the ends. The details of figure 6 is not represented.

1. The measuring roll to determine defects in the flatness of the tape and/or to determine the belt tension at the tape, in particular metal strip containing at least one embedded in the shell of the roll, respectively, in the outer surface, the measuring beam, which relies on sensors, characterized in that the measuring beam is made in the form of a beam (5, 5A) of tension measuring tape to determine the time course of the belt tension, which runs essentially along the direction of the regional circuit in one defined area of the circuit loop of the roll.

2. The measuring roll to determine defects in the flatness of the tape (2), in particular metal strip containing at least one embedded in the shell of the roll, respectively, in the outer surface, the beam measuring flatness (3A, 3b), which is supported on the sensors (4), and to determine the distribution the Oia voltage tension across the width of the ribbon is inclined to the axis (A) of the roll and passes, on the one hand, one defined area (b) width, and on the other hand, one defined area (U1) of the circuit path of the roller, characterized in that the beam measuring flatness (3A, 3b) contains at least one beam of measuring belt tension as a reference - the reference and measuring beams (5), which is also supported on the sensors (4) and to determine the time course of the belt tension runs essentially along the direction of the regional circuit in one given area (U2) circumferential contour of the roll.

3. Measuring roller according to claim 2, characterized in that the reference the reference and measurement beam (5) and beam measuring flatness (3A, 3b) are essentially the same as the area of the district on the path (U1=U2) roll.

4. Measuring roller according to claim 2 or 3, characterized in that the reference the reference and measurement beam (5) is located approximately in the middle (M) swath on both sides of the reference the reference and measuring beams (5) are located, respectively, at least one beam measuring flatness (3A, 3b).

5. Measuring roller according to claim 1, characterized in that the beam (5A) measuring belt tension runs throughout the district the contour of the roll.

6. The method of determining defects in the flatness of the tape, in particular metal strip, the measuring roller according to any one of claim 2 to 4, using a beam measurement of PL is scotnet (3a, 3b) measure one signal voltage tension (S) depending on time (t), representing the coordinate (b) width, and by reference the reference and measuring beams (5) measured in dependence on time (t) one reference signal (R), independent of the coordinates, width and represents the time course of the belt tension,
moreover, the reference signal (R) is filtered from the signal voltage tension (S) to determine a course of voltage (E) of the tape.

7. The method according to claim 6, characterized in that the own signal voltage (E) of the tape is determined depending on coordinates by the width of the tape by forming the difference between the signal voltage tension (S) and the reference signal (R).



 

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20 cl, 5 dwg

FIELD: measuring engineering.

SUBSTANCE: method comprises setting the article to be tested on the working table, moving the nonflatness meter, determining the amplitude of nonflatness, and determining coefficients of nonflatness. The device comprises source of light, multielement photodetector, objective, and computer.

EFFECT: enhanced reliability.

5 cl, 7 dwg

FIELD: measuring engineering.

SUBSTANCE: method comprises setting the article to be tested on the working table, moving the nonflatness meter, determining the amplitude of nonflatness, and determining coefficients of nonflatness. The device comprises source of light, multielement photodetector, objective, and computer.

EFFECT: enhanced reliability.

5 cl, 7 dwg

FIELD: rolling.

SUBSTANCE: proposed hot-rolling mill is provided with roller for measuring flatness which is installed on at least one roll table mounted before and/of after rolling stand and which acts onto at least one stand. Flatness check roller can be shifted from its working position in preset place. Roll table is furnished additionally with one roll table roller installed for turning, flatness check roller and roll table roller or rollers are arranged in compartment which can be turned by drive so that flatness check roller and roll table rollers can be set in working position by turning in same direction.

EFFECT: protection of flatness check roller from influence of ambient medium, increased quality of rolled product owing to prevention of damage to thin hot rolled strip.

20 cl, 5 dwg

FIELD: method and apparatus for determining planeness degree of hot belt metallic article with use of measuring roller.

SUBSTANCE: measuring roller includes cylindrical outer surface having angular contact sector and free sector at hot rolling of ferrous and non-ferrous metals. Method is realized due to applying tension load to angular sector of measuring roller whose cylindrical surface has angular sector for engaging with metallic belt and free sector. Roller is positively cooled due to circulation of heat exchange liquid at least along part of free sector of outer surface of roller. Parameters providing efficiency of cooling such as opening degree of angular cooling sector, temperature and flow speed of circulating heat exchange liquid are set. At each revolution predetermined equilibrium temperature is achieved on outer surface of roller. Apparatus for performing the method includes measuring roller mounted with possibility of rotation around axis normal relative to lengthwise motion direction. Cylindrical surface of said roller has angular sector engaged with metallic belt applied onto it and subjected to tension load and free sector. Apparatus also includes unit positively cooling roller due to circulation of heat exchange liquid at least along part of free sector of roller and unit for controlling cooling condition in order to provided predetermined temperature of outer surface of roller.

EFFECT: possibility for controlling planeness of article along its whole length, possibly hot rolled belt, improved quality of product.

15 cl, 6 dwg

FIELD: rolled stock production.

SUBSTANCE: method comprises steps of applying article in the form of belt subjected to tension effort to angular sector of measuring roll having several test zones spaced one from other by some distance; mounting in each test zone pickup for transmitting measurement signal at each revolution under load; comparing transmitted signal with reference one for evaluating in each lengthwise zone of belt data defining tension effort applied to respective zone. According to invention two values (i1, i2) of signals transmitted by each pickup at condition without load before passing of respective test zone through angular sector of applying belt and after it respectively and reference value (i0) used for comparison with signal value (i) measured at load presence by means of each pickup are formed at each revolution due to combining signal values i1, i2 at condition without load. Reference value i0 may be formed as arithmetic mean value of values i1, i2.

EFFECT: enhanced accuracy of measuring load distribution of rolled belt with elevated temperature.

7 cl, 10 dwg

FIELD: measurement of planeness of strip in reel shaft of hot strip rolling mill.

SUBSTANCE: proposed method includes measurement of planeness in reel shaft of hot rolling mill; reel shaft is provided with movable and immovable strips between pulling device and reel; hot strip is fed to reel through its shaft by means of roller table and pulling roller of pulling device; reel is provided with drum, hold-down rollers and end guides; roller for measurement of planeness is closed in reel shaft turned inside guide strip. Moving roller used for measurement of planeness has working position at which hot strip passes around roller used for measurement of planeness retaining approximately constant wrapping angle α and lowered position; reel shaft is provided with swivel guide strip closing the roller used for measurement of planeness.

EFFECT: enhanced economical efficiency; enhanced protection of roller in lowered position.

15 cl, 9 dwg

FIELD: metal working processes and equipment.

SUBSTANCE: roller includes at least one measuring head provided with partial measuring heads mounted at angular shift by 180° one relative to other in envelope of roller. Said partial measuring heads rest upon two force metering pickups; they are spaced in addition from roller envelope by means of gap surrounding them and they fastened one with other at least through one connecting tie rod. In process of measuring tension stress distribution of band along its width, band subjected to tension stresses along its whole width embraces roller for measuring surface planeness by predetermined contact arc. It provides pressure efforts acting upon roller for measuring surface planeness and allows determine tension stress distribution of band according to difference of pressure efforts of partial measuring heads.

EFFECT: improved accuracy of measurements due to elimination of errors caused by influence of outer factors.

12 cl, 5 dwg

FIELD: rolled stock production.

SUBSTANCE: method comprises steps of measuring tensioning efforts successively along width of band when it passes through manufacturing line; summing measured efforts for forming function of their total effort. Total effort function along width of band is used for determining distribution function of tensioning effort for determining band planeness. Apparatus for measuring band planeness includes at least one pickup arranged along width of band, connected to computing unit. Said computing unit is made with possibility of calculating tensioning stresses along width of band according to tensioning efforts acting upon band. Said pickup is placed by inclination angle relative to band motion direction.

EFFECT: enhanced accuracy of measuring planeness.

14 cl, 12 dwg

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