DE2310552A1 - DEVICE FOR MEASURING THE PROFILE OF TAPE MATERIAL - Google Patents

Description

DEVICE FOR MEASURING THE PROFILE OF TAPE MATERIAL

(Priority: March 3, 1972, Japan, No. 21519/72 June 28, 1972, Japan, No. 64035/72)

The invention relates to a device for measuring the profile of strip material, in particular for continuous Profile measurement of metal strips for use in belt rolling.

In the last decade the automation of tandem valleys has been has progressed rapidly and nowadays most of the new tandem mills use AGC systems (Systems for automatic cross-section control) or automatic computer-controlled systems.

In such a production system, the most important question is how exactly deviations or malfunctions are in a have the object to be checked determined. This question is for a cold rolling mill for rolling thinner and more precise strip than in a V / arm rolling mill where thicker strips or plates are rolled. The most important features of the cold rolling mill are the controls and Control of thickness and evenness (profile control).

Since the profile control is more difficult than the other controls, is currently technical development in particular

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desirable in this area. The roll bending process developed a few years ago is effective, but has In rolling mills so far not brought sufficient success, since there is no device, the flatness or that Determine the profile of the rolling stock with high reliability. Hence the development of a device for detection the flatness desired, which works with high reliability and can be used in practice.

One of the reasons for the difficulties, a device suitable for cold rolling mills for very precise profile control to be used in practice lies in the peculiarities of the cross-section reduction in cold rolling itself. Because the tape must be reduced in a cold rolling mill under good tension, the surface of the strip appears, which after removal the tension is wavy, even under the action of the tension. Therefore, it is unsuitable as a device for detection the flatness in connection with the cross-cut reduction to use known surface measuring devices for cold rolling, which only detect uneven surfaces.

For this reason, it is necessary to measure the surface of the cold rolled strip more precisely by not measuring the flatness the surface but certain variables proportional to the flatness can be measured.

Based on previous investigations, it has been found that the best is correlative with the flatness of the surface Variables exist in the tension distribution of the belt in the direction of the belt width. Will a section of the strip which is not even if no tension acts on the strip, the section becomes even without being particularly large Attack tensile forces on him; on the other hand, shows which is, if there are no stresses acting on it, very high tensile stresses, if the section is larger

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Is subjected to tension.

Theoretically, it is therefore possible to reduce ribbons evenly by measuring the stress distribution in the width direction of the ribbon. So far, various devices for determining the flatness have become known, which are based on the above theory, see Japanese Patent Publications 20181/1967 and 21209/1969, also US Patent 3,334,508 and French Patent 1,486,208.

The known devices for determining the flatness are used to give the surface of a belt with a suitable shape to eat; however, since they have the following defects, they are not reliable in practical use enough. In the device disclosed in Japanese Patent Publication 20 181/1967 with two columns A surface profile can be used to measure the flatness (a stress distribution) with several uneven sections in the direction of the bandwidth did not notice there the device is only provided with two measuring rollers.

In the device disclosed in Japanese patent publication 21 209/1969 with a multi-column roller for determining the flatness, since in this device the measuring part rotates UT'I slip rings are used to derive the measuring signals from the measuring parts, erroneous measurements are very often carried out; in addition, the device is unreliable and prone to breakage.

The device disclosed in U.S. Patent 3,334,508 It is also equipped with several measuring rollers for measuring the flatness, but differs from the device according to Japanese Patent Publication 20 181/1967 in that each measuring roller is stored individually; in a device of this type of construction, the surface of the belt is often

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"damaged because there are large gaps between the measuring rollers are.

With the device for measuring the flatness according to the French Patent 1,486,208 in which the surface profile of a belt (its stress distribution) in the print a fluid used therein is a device that increases the pressure of the fluid holds constant, as well as a very precise device for measuring the fluid pressure is required. Hence the Structure of this device is very complicated and disadvantageous in that there is a risk of oil leaks.

Because of the difficulties mentioned, the known devices not used commercially.

The invention is based on the object of a device to be provided for measuring the profile of a strip with which the flatness or the profile of the strip can be measured precisely, without damaging the strip surface, which is why a large number of measuring elements are arranged very close to one another. The measuring device should be simple in its construction and not have any unstable parts. Furthermore, the device work at high speed and stable, which is why the moving parts are provided with a variety of roller or ball bearings. The measuring members should be simple to be installed and removed and to be maintained. Impulse loads should be avoided by devices for generating a preload.

A feature of the invention is that a plurality of measuring members are arranged in the direction of the belt width, each measuring element having means for converting the tension component on the belt into torque and means for measuring the response of the torque . According to a further feature of the invention is the

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Measuring circuit built so that the stress distribution of a tape occurs across the width of the tape Tension component as well as the tension component of a portion of the tape is based.

In short, the device according to the invention comprises profile measurement of strip material an axis attached transversely to the direction of movement of the strip and a large number of measuring elements, having a plurality of outer rings in contact with the belt and a plurality of load cells. The measuring device is constructed in such a way that the devices for mounting the outer ring on the axis in the axial direction as well as in the direction perpendicular to the axial direction are contained therein and that the load cells each show the reaction determine the torque exerted on the measuring member by the normal component of the tension in the strip material.

The invention is explained in detail in the following description of preferred exemplary embodiments with reference to the drawings explained. Show in the drawings

1 and 2 are schematic side views of roll stands, each with one profile measuring device according to the invention;

Fig. 3 is a schematic front view of a

Embodiment of an inventive Device for measuring the profile of strip material;

FIG. 4 shows a side view of FIG. 3 in the direction of line IV-IV according to FIG. 3;

Fig. 5 is an enlarged partial view along section V-V of Fig. 3;

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6 shows a partial section along the line VI-VI according to FIG. 5;

7 and 10 to 14 each show sectional views of further embodiments of the invention in a representation similar to FIG. 5;

FIG. 8 shows a partial section along the line VIII-VIII according to FIG. 7;

9 shows a partial section along the line IX-IX according to FIG. 7;

15 to 17 are partial sections or partial representations along the lines XV-XV, XVI-XVI and XVII-XVII of FIG. 14; and

18 shows a schematic representation of the inventive Measuring circuit.

In the embodiments according to FIGS. 1 and 2, a device 5 for measuring the profile of strip material is arranged between the last roll stand 1 of a rolling mill and a UmIeHIa-ZaIZe, the roller 4 on the strip S, which after passing the work rolls in the roll stand is wound on a drum 3, exerts tension. The profile measuring device 4 comprises a measuring roller 6, which is in direct contact with the rear side of the strip S, and a control circuit 7 which generates control signals from the movements determined by the measuring roller 6. The AusgangsSignaIe the control circuit 7, for example, the respective roll bending device of the work roll 2 and / or the respective Süt *> roller 8 is supplied to the profile of the strip S to lteuer:;.

In the embodiment according to FIG. 2, the deflection roller 4 is

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omitted according to Fig. 1 and replaced by a measuring device, for example the measuring roller 6 of the profile measuring device , while the measurement and control method itself is the same as that of the device of FIG.

Since the arrangement described above is known as such, the description of further details is omitted.

Using FIG. 3 and the following figures, specific embodiments of the device according to the invention are intended for determining the profile of strip material described in detail will.

In Fig. 3 and 4, the entire structure of a device according to the invention is shown schematically. As from Fig. 3 1 and 4 clearly visible, the device comprises a frame or housing 10 fixed to the floor, a measuring head 11, which is movable along the inner wall of the housing 10, and a mechanism 12 for moving the Measuring head 11. The measuring head 11, which is designated by this reference number in its entirety, comprises a generally box-shaped movable support 13, an axis 15, both ends of which are horizontally connected to two upright on the support 13 Bearings 14 are attached, as well as a multiplicity of measuring members 16 drawn onto the shaft 15.

Each of the measuring members 16 comprises, according to FIGS. 5 and 6, an oscillating body or inner ring drawn onto the axis 15 17, which can rotate freely around the axis and with it at an eccentric relative to the center of the axis 15 Place is movably connected, furthermore an outer ring 19 surrounding the inner ring 17, which over several on the outer surface of the inner ring 17 arranged rollers 18 is rotatable relative to the inner ring, as well as a device for measuring or Determination of the force, for example in the form of a load cell 20, between the inner surface of the inner ring 17 and

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the outside of the axle 15 is arranged. In the outer surface of the axis 15 there are grooves, depressions, flats etc. provided. A sliding plate 22 is arranged in a longitudinal groove 21 formed on the upper side of the axle 15 the load cells 20 with equal mutual distances are attached. In a shallow recess 23 adjoining the groove 21 there are input and output guide wires 24 for the load cells 20 with a holder 25 arranged. The plate 22 is in the groove 21 in the longitudinal direction the axis 15 displaceable so that the load cells 20 can be pulled out for checking or repair without other parts need to be removed.

In a lateral part of the surface of the axis 15, a flattening 26 running in the longitudinal direction of the axis 15 is formed, and on the surface adjacent to the flat 26 are generally square-shaped depressions 27 in regular intervals Distances in the longitudinal direction of the axis 15 are provided. The recess 27 receives a square-shaped lower projection 29 a of a bearing 29, which is a horizontal Has bore and is attached to the axis 15 by fastening means such as bolts 30 or the like. In the Bore a needle bearing pair 31 is used, in which a mandrel 33, which will be described below, is rotatably mounted.

The respective inner ring 17 is on the flat peripheral part, which is via axial bearings 32 in the respective space between the bearings 29 is arranged, a bore parallel to the axis 15 is provided, into which the mandrel 33 is inserted is. The middle section of the mandrel 33 is rigidly attached to the inner ring 17. The two ends of the mandrel 33 protrude on both sides out of the inner ring 17, penetrate the axial bearings 32 and are rotatable in the respective bearings 31 stored. As a result of this structure, the inner ring becomes 17 supported by the bearing 29 so that it can swing around the mandrel 33.

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On the outer surface of the inner ring 17 is an annular one Projection 271 is provided, the two end faces 272 of which support the end faces of the rollers 18 and serve to to fix the outer ring 19 relative to the inner ring 17 so that the outer ring 19 is in the longitudinal direction of the axis 15 almost not moved.

For the purpose described above, there is also a shallow depression in the central part on the inside of the outer ring 19 191 provided along the circumference. The width of the recess 19I is equal to the length resulting from the length of the two rollers 18 and the width of the projection 271 results, so that the two with their one end faces the inner ring 17 touching rollers 18 fit into the recess 191 of the outer ring 19 and movements of the rollers 18 in the axial direction can be prevented by the two side surfaces of the recess 191.

From the above explanation it is readily apparent that movements of the inner ring 17 in the axial direction by the Bearing 29 and thrust bearing 32 and movements of the outer ring 19 in the axial direction by the recess 191, the rollers 18 and the projection 271 of the inner ring 17 prevents v / grounding.

Fastenings 34 for a lubricating oil line 35 are arranged on the flat area provided on the outer surface of the axle 15. The line running in the longitudinal direction of the axis 15 is in this case in a hole provided in the fastenings 34 used. Injection lines 36, which extend radially from line 35, are also arranged on lubricating oil line 35 and are pivotable about the axis of the line 35. At the tips of the injection lines 36 are T-shaped nozzles 37 attached, the ends of which are directed against the end faces of the bearings.

The outer rings 19 are parallel to one another on the axis 15

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arranged with small gaps so that on the tape material, which is drawn in the tangential direction over the outer surface of the outer rings 19 under the intended tension, there are no grooves. On the end faces of the outer rings, annular shallow grooves are provided into which O-rings 38 are used, the thickness of which is more than twice that is as large as the depth of the grooves, so that the interior of the outer rings 19 is completely sealed off from the environment. With such a structure, the strip material S contacting the surface of the outer rings 19 is prevented from passing through the lubricating oil from the interior of the outer rings 19 is contaminated and thereby adversely affected after rolling.

Since in the aforementioned structure also the end faces of the outer rings 19 lie approximately in the middle of the respective adjacent bearings and the nozzles 37 against the interior of the outer rings 19 are directed and therefore do not open at the end of the outer rings 19, oil loss to the outside can be completely avoided.

A plurality of bores 39 are provided on the underside of the axle 15 at equal intervals. Each bore 39 extends from the surface of the axis 15 inwardly parallel to the direction of the force acting on the load cells. In each Bore 39, a plunger 41 pretensioned by a spring 40 is arranged displaceably. The spring 40 pushes the plunger outwards, so that the tip of the plunger 41 always rests on the inner surface of the inner ring 17 and the ring around the Mandrel 33 pivoted counterclockwise. This biasing device ensures that the load cell 20 always works correctly within a suitable measuring range and pulse-like contacts between the load cell 20 and the inner ring 17 can be avoided.

The mode of operation of a measuring element in the case that the flatness of a strip material, for example the strip S, is to be described with the aid of FIGS.

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written profile measuring device is to be determined.

If the strip material to be reduced is in the direction of arrow f under good tension over the surface of the outer ring J 9 pulled, the outer ring 19 rotates due to the frictional force that exists between the back of the band material S and the surface of the outer ring 19 occurs. At the same time, the normal component Tn acting on the strip S acts Tensile stress T over the rollers 18 on the inner ring 17. Since the inner ring 17 with the axis 15 over the mandrel 33 at one point is connected, which is at some distance from the line of action of the normal component Tn, the inner ring 17 is through the normal component Tn is pivoted about the axis of the dome 33. This means that the inner ring 17 with the outer ring as a result of the torque that rotates from the normal component Tn and the distance of the dome 33 from the line of action of the normal component is formed. If the inner ring 17 rotates about the axis of the mandrel 33, the inner surface of the inner ring becomes is printed against the load cell 20, which is arranged in the groove 21 of the axle 15 and which represents the normal component Tn of the tension T determined from the effect of the torque.

A further exemplary embodiment is shown in FIGS. 7, 8 and 9. This embodiment is different of the embodiment according to FIGS. 5 and 6 not in principle but only in its structure.

According to FIG. 7, there are three flats on the surface of an axis -15A A2A, 42B and 42C shaped that are equiangular around the axis are distributed. A heating member 16A and support devices 51 are attached to the flats. The measuring element 16A is similar to the measuring member of FIGS. 5 and 6 and comprises a mandrel 33A, both ends of which are rotatable in bearings 29A are stored. The bearings 29A are attached to the axle 15A via needle bearings 31A. The measuring member further comprises 16A a swing arm 43 », one end of which loads on the mandrel 33A

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is fixed, a guide ring 45, the surface of which is in contact with the inside of the outer ring 19A and which is rotatably mounted with its central portion by ball bearings 44, and a load cell 2OA, which is attached to the Flat 42A is attached and the tip of swing arm 43 supports. Since the structure of FIG. 7 is largely in principle not different from that according to FIGS. 5 and 6, identical or corresponding parts are shown in FIGS. 7 to with the additional letter A.

The supports 51, which have the same structure, are attached to the flats 42B and 42C. At axis 15A generally square recesses 52 are provided in the longitudinal direction and at equal distances from one another, which in FIG their center each have a cylindrical recess 53, the axis of which runs parallel to the axis 15A. In the A short carrier 55 is inserted into recess 52, the underside of which generally has the same shape as the recess

52 and which is fixed by screws or the like.

The upper side of the carrier 55 is provided with a cylindrical surface similar to the inner surface of the outer ring 19A, with a gap between the cylindrical surface of the carrier 55 and the inner surface of the outer ring 19A. The middle section of the carrier 55 is divided into two parts, in each of which a bore is provided. A mandrel 51 , to which the carrier is attached, is inserted into each of the bores. On the middle section of the dome 57 is a ring 59, part of which is inserted into the cylindrical recess

53 engages, pulled up so that the outer surface of its other part is in contact with the inner surface of the outer ring 19A stands.

As can be easily understood, the swing arm in the embodiment according to FIGS. 7 to 9 corresponds to the inner ring 17 Fig. 5, and the rings 45, 59 correspond to the rollers 18 according to

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Fig. 5.

In Fig. 10 "an embodiment is shown in which a fluid, for example air, is used under high pressure to support the outer ring 19. In this Embodiment, the outer ring is designed so that the fluid in a very small distance between the Outer ring 19 and the axis 15 is supplied via an injection bore 61, which is provided by an in the interior of the axis 15 Feed bore 60 extends radially. The outer ring is thus levitated on the axis 15 by the fluid held and therefore rotates very easily.

In Fig. 11, an embodiment is shown that serves to / using a fluid with high Pressure to exert a preload on the load cell 20. In this embodiment, the fluid is under high pressure in the distance between the inner ring 17 and the axis 15 via a single inoection bore 63, which proceeds from a running in the interior of the axis 15 in the radial direction high pressure feed bore 62, so that the Inner ring 17 is displaced by a small amount relative to the axis 15 and a preload is applied to the load cell 20 will.

Another embodiment of a profile measuring device is explained below with reference to Figures 12 and 13, According to FIG. 12, an inner ring 17B is drawn onto an axle 15B, in the housing 10 via bearings 14, the movable support 13 and "the mechanism 12 for moving the up and down Support 13 is mounted as in Fig. 3. A plurality of rollers 66 and a guide ring are located between the axis 15B and the inner ring 17B 67 is arranged so that the inner ring 17B can be easily rotated. The inner ring 17B has an eccentric to the axis 15B Area. On the inner ring 17B, an outer ring 19B runs over a plurality of rollers 18B, which with the band S

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is in contact, and on which the train component engages. On a side portion of the inner ring 17B is a Stop 64 is attached via screws 65 for fastening a measuring device, such as a load cell 20B. The load cell 20B is in contact with a recess formed in a side part of the axis 15B.

Since the eccentric distance between the center of the axis 15B and the surface of the inner ring 17B is 11 and the normal component the tension in the strip material Tn, a torque 11 · Tn is exerted, the reaction of which is applied to the Load cell 2OB attacks. As a result, the tension in the respective section of the strip material is determined by the load cell 20B determined or measured.

Fig. 13 shows a further embodiment in which the distance 13 between the center of the axis 15 and that The point at which the load cell acts is shorter than the corresponding distance 12 in FIG. 12; therefore it is possible in the embodiment of FIG. 13 on the load cell exert a greater force to get a stable output signal to achieve.

A further exemplary embodiment is to be explained with the aid of FIGS. 14 to 17. According to Fig. 14, an axis is 15c provided, which corresponds to the axis 15 of FIG. In the right upper portion of the axle 15c is an axial groove 151 shaped. A projection 291 of a bearing 29c protrudes into the groove 151 and engages in a sliding manner and by means of a screw 68 is attached. The bearings 29c are used in pairs according to FIG. 17, with a mandrel 33c between each two bearings 29c is mounted on needle bearings 31c. A holder 17c corresponding to the inner ring 17 of FIG. 5 is on the central portion of the dome 33c, and a thrust bearing 32c is provided between the holder 17c and the respective bearings 29c. The holder 17c can thus be in the axial direction of the mandrel 33c

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do not move, but can be pivoted about the mandrel 33c. The inside of the holder 17c is arcuate and surrounds the axis 15c similar to the inner ring 17 according to FIG. 5; in In the middle and at both ends of the arcuate holder 17c, roller or ball bearings 69 are provided via mandrels 70. The bearings 69 in turn rotatably support an outer ring 19c which rotates in contact with the strip material S. Through this becomes the normal component Tn of the tension T in the tape material S transferred via the outer ring 19c to the holder 17c, so that the latter is rotated about the mandrel 33c; thereby form the normal component Tn and the distance between the verticals passing through the center of the mandrel 33c and the one in the middle of the holder 17c arranged bearings run, a torque around the mandrel 33c.

The mandrel 70, which has smaller sections at both ends Diameter is provided is attached to the holder 17c. The bearings 69 are smaller at these sections Diameter fastened by means of clamping rings 70 '. The outer ring 19c is provided with a groove along its inner surface, which serves to prevent axial displacement of the outer ring 19c. This ensures that the outer ring 19c can only rotate about its axis. The width of the outer ring 19c is determined by the number of points at which is to be measured across the width of the tape S, and is et "ras shorter than the length of the mandrel 70 or the mandrel 32c" or smaller than the distance between the outer sides of the two bearings 29c, so that a plurality of outer rings 19c can be arranged very close to one another in the axial direction.

A longitudinal groove 21 is arranged on the upper side of the axle 15c, into which a slide plate 22c is inserted. On the sliding plate 22c are a load cell 20c and inputs and Output lines 24c for load cell 20c attached. If the sliding plate 22c is pushed into its predetermined position, so the force measuring part of the can 20c touches the holder 17c,

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As mentioned above, each measuring element is constructed in such a way that the Normal component Tn of the tension T in the strip material S via the outer ring 19c into a torque about the mandrel 33c of the holder 17c is transformed and the response of the torque can be measured by the load cell 20c v / ground.

In the direction of the width of the strip material S, a plurality of measuring members are arranged. On the attached to the housing 10 Several groups are provided on the common axis, each with the bearings 29c, the holders 17c and the outer ring 19c include. As in FIG. 3, the axis 15c is fastened to the housing 10 via the bearing 14, the support 13 and the mechanism 12. The holding elements (holder 17c, bearing 29c etc.) of the outer ring 19c are contained within the outer ring 19c, so that several outer rings can be arranged close to one another. On the front sides of the outer rim 19c are Grooves for O-rings 38c are provided, which prevent leakage of lubricating oil from the interior of the outer rings 19c. The load cells 20c are attached to the slide plates 22c in each case at the position corresponding to the holder 17c. Therefore, it is possible to take out a plurality of load cells by pulling out the slide plate 22c along the axis 15c without to disassemble the holder 17c. Along the axis 15c are lubricating oil lines 35c for lubricating the inside of the outer rings 19c provided. From the lines 35c branch injection lines 36c for supplying the lubricating oil to the sides of the respective Camp 69 from. Furthermore, the lubricant supply is constructed in such a way that the lines 36 extend into the positions shown in FIG. 14 Turn the position shown in dashed lines.

When assembling the above-mentioned measuring member, first the bearings 29c, the mandrel 33c, the needle bearings 31c, the thrust bearings 32c, the holder 17c, the mandrels 70, the bearings 69 and the outer ring 19c are assembled, whereupon the projection 291 of the bearing 29c is inserted into the axial groove 151 of the axis 15c and fastened with the screws 68 in a certain position.

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After these processes have been carried out several times, the sliding plate 22c, on which the load cells 20c and the wires 24c are attached, inserted into the groove 21 of the axis 15c in a certain position. The measuring members 16c are over the entire Width of the strip material S arranged.

18 is a schematic circuit diagram of a control circuit for the profile measuring device mentioned above. The control circuit is designated by 100 as a whole and comprises a comparative display circuit 101 which shows the output signals of the elements 16 arranged in the individual measuring elements Compares load cells 20 with a reference signal and indicates the difference between those signals, as well a reference signal generator circuit 102.

The comparative display circuit 101 comprises a plurality of amplifiers 103 which receive the output signals of the respective load cells 20, at least the adding stages 104 L and 104R which add the output signals of the various amplifiers, a functional amplifier 105 which compares the output signals of the adding stages 104L and 104R and summed up, comparators 106, which compare the output signals of the respective amplifiers 103 with the reference signal Ta and form the respective differences, a plurality of display instruments 107 which display the output signals of the comparators 106 and send them from the terminals JAO to J10 to suitable (not shown) Transfer actuating mechanisms which remove the deviation in the flatness of the strip material, so / ie a plurality of comparators 106 ¹ L, 106 ¹ R, which compare the output signals of some of the amplifiers 103 with reference signals Te.

On the other hand, the reference signal generator circuit 102 comprises a switching device 108 and a reference signal generator 109, a computer 110, a counter 111 and a presetting device 118 includes. The facility 118

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2 310 5

If the signal B corresponds to the width of the strip material S, this signal is supplied to the selector 111 to the Contacts of the switching device, for example, corresponding to the detector e, which touches the side of the strip material S, to select; for this purpose, sliding contacts or actuating elements 113 are shifted to the relevant switching devices close. The facility 118 also sets the computer 110 to read the magnitudes of the reference signals Ta and Te correspond to the tensions at both lateral ends of the strip material S as well as in the intermediate one Section of the material based on the output signals T of the function amplifier 105 and the signal B from the device 118 calculated.

The reference signal generators, which are present in the same number as the measuring elements 16, generate output reference signals for setting the output signals from the respective measuring elements.

The control circuit described above has relay contacts 112 on the input side, which are only activated when an input signal is present are closed, with the instruments

107 can be actuated on the corresponding pages. As can be seen from Fig.18, the on the input side of the respective Display instrument 107 arranged relay contact 112 closed by a signal R1 which is generated simultaneously when the various reference signal generators which generate reference signals. Selector switches 418 are arranged on the output side of the amplifier 103; these are generated by an output signal R2 from the switching device

108 operated so that the amplifiers 103 are connected to the comparators iO6 ^f L, 106 ¹ R when the signal Re is fed to the selector switches.

The following explains how to take a profile measurement of a strip material S with unevenness by means of the control

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circuit according to Fig. 18 is recognized. Before doing this, however, it is necessary a control system used in this embodiment or to explain measuring methods.

In the embodiment of the invention, a system is used in which an adjustment and control signal is generated by comparison with the measurement results obtained by determining the Unevenness can be achieved with the help of the measuring members arranged symmetrically to the center line X-X of the belt width. According to With this system, the position of the unevenness of the belt surface can easily be determined, and in addition, the profile control of the tape can be performed easily and accurately.

After the bandnefcerial started to pass through the device has, the measuring head 11 is kept sufficiently low by the lifting mechanism 12 at the time at which the The tip of the strip is pulled off the last roll stand, passed over the measuring elements 16 and wound onto the drum 3 will. After the tension exerted by the drum 3 on the belt S has become a stable value (which is about by measuring the change in the load current of a motor for the winder, or in some other suitable manner is confirmed), the measuring head 11 is raised by the mechanism to a certain position in which the measuring elements 16 be pressed against the back of the band material S with a certain pressure. As a result, the outer rings 19 ground through the friction between the back of the belt S and the peripheral surface the rings 19 rotated. In this case, the surface of the rolled strip should ideally be complete be flat and level as indicated in Figure 18 by the horizontal line 114; in reality is the surface however, it is not flat, but has an unevenness, which is indicated by the curve 115 in an exaggerated manner. The sizes the output signals from the load cells 20 located in the measuring members 16 are now proportional to the degree of unevenness according to curve 115 with respect to the horizontal line

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114, and these signals have positive or negative signs. The output signals are grounded as described below is modified, by comparison with the voltage reference signal, so that it reflects the actual voltage distribution Show. Since the total width of the measuring head 11 formed by all the measuring members 16 is greater than the width B of the strip material to be measured, the output signals of the measuring elements 16e, which are in contact with the Edges of the strip material stand, are treated separately from those of the other measuring members.

As mentioned above, according to the invention, the two areas into which the width of the tape is divided along the center line X-X, measured separately, and the measurement results thereafter compared to each other.

The output signals generated by the load cells 20 are in the amplifiers 103, which are present in the same number as the measuring elements 16, amplified and the respective comparators 106 supplied; at the same time the signals that are on the left side of the tape are left from the center line X-X are fed to the adder 104L and the measurement signals on the right side of the adder 104R. The output of the adder 104L is thus formed an average value of the voltage on the surface to the left of the line X-X, while the output of the adder 104R is the mean value of the stress in the surface to the right of line X-X. The output signals of the two adder stages 1O4L, 104R are then fed to the functional amplifier 105, which sums or subtracts the signals from one another, so that an output signal LV is obtained in accordance with the calculation indicating the variation in stress or stress distribution. By summing both input signals, at the same time a measurement signal T is determined which corresponds to the voltage value in the material band. The one corresponding to the fluctuation Signal LV is sent to a suitable actuation

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mechanism supplied (see Fig. 1 and 2).

The voltage signal T is fed to the reference value calculator 110 in the reference signal generator circuit 102. Simultaneously the bandwidth B is set via a selector switch (not shown) entered into the computer 110, where the calculation of the reference signals Te, Ta takes place in order to obtain the output signals of the an and to modify measuring members 16e, 16a arranged between the edges of the tape.

Is the width of the strip material S, which is connected to the outer rings 19 of the measuring elements arranged on the two sides of the strip is in contact, equal to e and the width of the band that is in contact with the outer rings that are between the the outer rings 19 touching the edges are arranged, equal to a (compare FIG. 18), the modifying Express reference values Ta, Te by the following equations:

Ta = a χ - ^ -, Te = e χ

Hence, Ta and Te can be calculated when B and T are given.

The signal B corresponding to the bandwidth B is fed to the selector 111 for the two sides, in which a signal for deciding the lateral position is generated so that the above-mentioned switching device 108 is actuated accordingly. When the decision signal is generated by the selector 111, the contacts 10811 of the switching device 108 corresponding to the sides of the tape are closed. The signals R1, R2 are fed to the relay contacts 112 and the presetting device 118 in order to close the relay contacts 112 and to connect the amplifiers 103 to the comparators 106 ¹ L, 106 ¹ R.

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On the other hand, the signal B corresponding to the bandwidth is also fed to the reference value calculator 110, in which the modifying reference values Ta, Te are calculated on the basis of the output signals T of the functional amplifier 105 and the signal B from the device 118. The resulting voltage reference signals Te, Ta v / ground the respective comparators 106, 106 ^! R _f 106 ¹ L supplied, where comparisons of the output signals of the load cells with the voltage τ comparison signals are carried out and the resulting difference output signals are displayed on the respective display instruments. Since a reference line 116 is provided on the instrument panel, the voltage distribution across the bandwidth can be clearly indicated by marks 117. At the same time, an output signal A5 from the respective measuring instruments is fed to an actuating device (not shown) for profile control.

309839/0399

Claims (12)

EXPECTATIONS 1. Device length for measuring the profile of strip material, wherein at least one measuring member which is in contact with tape material transported under tension in its longitudinal direction stands, the profile measures by measuring a component of the voltage, characterized in that the measuring element (16) is constructed so that it reacts to a torque caused by the tension component of the strip material measures. 2. Apparatus according to claim 1, characterized in that several measuring members (16) side by side are arranged transversely to the conveying direction of the strip material. 3. Apparatus according to claim 2, characterized by a measuring and control circuit (100), the devices for summing (104) the output signals of the measuring elements (16) and means (106) for modifying the output signals by a reference signal resulting from the summation. 4. Apparatus according to claim 2 or 3, characterized in that the measuring members on an axis (15) side by side and at certain distances from each other arranged elements (17), wherein from the outer surface each element has an outer ring (19) rotatably supported and 309839/0 3 99 a device (20) between each element and the axle is intended to determine the force that is exerted by the said moment on the individual elements, 5. Apparatus according to claim 4, characterized in that each element (17) on the axis (15) is pivotally attached via bearings (29) and that the force measuring device (20) at a certain distance from the bearings the axle is attached. 6. Apparatus according to claim 4 or 5, characterized in that the outer ring (19) over a plurality of bearings (18) distributed approximately equally over the element (17) is rotatably mounted. 7. Device according to one of claims 4 to 6, characterized gekennzeic lr..n e t that the axis (15) on one Support (13) is attached, in turn via a lifting mechanism (12) is attached to a housing (10). 8. Device according to one of claims 4 to 7, characterized in that the bearings (59, 69) are approximately are distributed in three equal angles around the axis (15). 9. Device according to one of claims 4 to 8, characterized ge. know that a multitude of forces 309839/0399 measuring devices (20) arranged on a sliding plate (22) are that they correspond to the individual elements (17), and that the sliding plate on the axis (15) in their Is arranged longitudinally. 10. Device according to one of claims 4 to 9, characterized in that the force measuring devices are formed by load cells (20) with output lines (2A) for taking the output signals and that the sliding plate (22) on which the load cells and the lines are arranged , can be pushed into a groove (21) formed in the axis (15). 11. Device according to one of claims 4 to 10, characterized in that between the axis (15) and the element (17) a device (40) is arranged to the force measuring devices (20) with a certain force to pretension. 12. Device according to one of claims 5 to 11, characterized in that each element (17) is approximately in the middle has a bearing (33) and that the outer ring (19) via this bearing and a large number of on the axis (15) mounted bearings (31) is mounted such that the rotating elements (18) of the bearing with the inner surface of the Outer ring are in contact. 309839/0399