JPH10170364A - Tension detecting device for belt-like material and facility using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and accurately detect the tension given to a belt-like material. SOLUTION: A tension detecting device is provided with a rotary sleeve 4 which is rotatably supported on the outer periphery of a fixed shaft 3 with pressurized air in between and rotates when the sleeve 4 comes into contact with a strip 2, a gap sensor which detects the amount of the gap between the shaft 3 and sleeve 4 at a part facing the strip 2, a pressure sensor 9 which detects the pressure in the gap, and an arithmetic means which computes the tension of the strip 2 based on the detected results of the sensors 8 and 9. The detecting device easily and accurately detects the tension given to the strip 2 by finding the tension of the strip 2 by detecting the state of the gap between the sleeve 4 and shaft 3 by means of the sensors 8 and 9 and analyzing the detected amount of the gap and pressure in the gap by means of the arithmetic means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the tension of a strip material and equipment using the same, and is applied to the detection of the tension of a steel strip, paper, film or the like.

[0002]

2. Description of the Related Art When a belt is wound around a roller and travels, a defect occurs in the belt if the tension applied to the belt is not appropriate. For example, if the tension applied to the band is too large, the band may be cracked or even broken, and if the tension applied to the band is too small, the band may sag and overlap. There is.

[0003] Therefore, conventionally, the tension applied to the strip has been adjusted by detecting the tension of the strip.
Conventionally, the tension applied to the strip is detected by a roll on which the strip is wound (such as a bridle roll in the case of rolling equipment).
And a method in which a load cell is incorporated into the belt, and a detection is performed based on a load applied to the load cell, a method in which a looper roll is brought into contact with a band-shaped material, and measurement is performed based on a reaction force applied to the looper roll.

However, in the detection by the load cell, the detection can be performed only at the roll position where the load cell is incorporated, and the tension cannot be detected at an arbitrary position. The accuracy using the looper roll was not so good.
In addition, in any of them, the tension distribution in the width direction of the strip could not be measured. Further, in a manufacturing facility for a steel plate or the like, it is necessary to detect the tension as quickly as possible in order to reflect the suitability or unsuitability of the tension on the product.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in detecting the tension of a conventional strip, and has as its object to enable easy and accurate detection of the tension applied to the strip. It is a thing. Another object of the present invention is to make it possible to detect the tension distribution in the width direction of the strip.

[0006]

According to the present invention, there is provided a tension detecting device according to the present invention, comprising: a rotating sleeve rotatably supported on the outer periphery of a fixed shaft via a fluid and rotating in contact with a strip material; Gap state detecting means for detecting a state of a gap between the fixed shaft and the rotary sleeve at a portion opposed to the band material, and calculation for calculating a tension of the band material based on a detection result of the gap state detecting means Means.

[0007] The state of the gap between the rotating sleeve that rotates in contact with the strip and the fixed shaft is detected by the gap state detecting means, and the state of the gap detected by the gap state detecting means is analyzed by the arithmetic means, and the band is detected. Is calculated.

The tension detecting device according to the present invention is characterized in that the gap state detecting means is a gap sensor for detecting an amount of a gap between the fixed shaft and the rotary sleeve in an axial direction. Further, the gap state detecting means is a pressure sensor that detects a pressure in a gap between the fixed shaft and the rotating sleeve in an axial direction.

[0009] The calculating means may include a belt-like shape based on a detection result detected by the gap state detecting means based on a supply pressure value of a fluid supplied between the fixed shaft and the rotating sleeve. An arithmetic function for calculating the tension of the material is provided. Further, the calculation means includes a tension of the strip-shaped material based on a supply pressure value of a fluid supplied between the fixed shaft and the rotating sleeve based on a detection result detected by the gap state detection means. Is provided.

Further, according to the present invention, a tension detecting device for the strip material is provided in the middle of the running line of the steel strip, and the tension applied to the steel strip is adjusted based on the tension obtained by the tension detecting device. This is a steel strip production facility characterized by the following. In this steel strip production equipment, since the tension applied to the steel strip can be appropriately maintained, it is possible to prevent defects from occurring in the steel strip.

[0011]

FIG. 1 is a perspective view schematically showing a tension detecting device for a strip-shaped material according to an embodiment of the present invention, FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. FIG. 4 shows a state viewed from the line III-III in FIG. 2, and FIG. 4 shows a block diagram of tension detection of the belt-shaped material tension detecting device according to one embodiment of the present invention. Note that the illustrated embodiment is applied to a traveling line of a strip as a strip.

As shown in FIGS. 1 to 3, a roll 1 constituting a tension detecting device 21 has a steel strip (strip) 2 contacted or wound thereon. That is, a rotary sleeve 4 is rotatably supported on the outer periphery of the fixed shaft 3 via a fluid (air), and the rotary sleeve 4 comes into contact with the strip 2 and rotates. An air chamber 6 into which pressurized air is supplied from an air supply device 5 is provided inside the fixed shaft 3.
A plurality of air ejection holes 7 connected to the air chamber 6 are formed in the upper part of the fixed shaft 3 facing the strip 2 via the rotary sleeve 4 in the axial direction.

A plurality of gap sensors 8 and pressure sensors 9 as gap state detecting means are provided on the fixed shaft 3 between the air ejection holes 7 in the axial direction. The axial distribution of the amount (flying amount) δ between the rotary sleeve 4 and the fixed shaft 3 when air is blown out from the air blowout hole 7 is determined by the gap sensor 8.
And the axial distribution of the pressure p in the gap between the rotating sleeve 4 and the fixed shaft 3 when air is blown out from the air blowing hole 7 is detected by the pressure sensor 9.

As shown in FIG. 4, the distribution information of the flying height δ detected by the gap sensor 8 and the distribution information of the pressure p detected by the pressure sensor 9 are calculated by an arithmetic unit 10 as arithmetic means.
The distribution of the tension T in the width direction of the strip 2 is calculated in the arithmetic unit 10 based on the distribution information of the flying height δ and the distribution information of the pressure p.

In the tension detecting device 21 having the above structure, the gap sensor 8 and the pressure sensor 9 as gap state detecting means are provided.
Although the example in which the two sensors are provided is shown, only one of the sensors may be provided. In addition, the tension detecting device 21 composed of the above-mentioned components is unitized, and may be portable as required. In that case, the roll 1 may be incorporated as a part of the apparatus, or the roll in the line may be used as it is.

The operation of the tension detecting device 21 will be described. The roll 1 is pressed against the lower surface of the strip 2 by urging means (not shown), and pressurized air having a constant pressure is supplied from the air supply device 5 to the air chamber 6. By supplying pressurized air to the air chamber 6, air is ejected from the air ejection hole 7, and the air is ejected from the air ejection hole 7, so that the rotary sleeve 4 is connected to the fixed shaft 3 via a fluid (air). It rotates and rotates along with the travel of the strip 2.

At this time, the amount of the gap between the fixed shaft 3 and the rotary sleeve 4 is detected by the gap sensor 8, and, for example, as shown in FIG. Is obtained. Further, the pressure p in the gap between the fixed shaft 3 and the rotary sleeve 4 is detected by the pressure sensor 9, and for example, a distribution of the pressure p inclined to one end in the width direction of the strip 2 is obtained as shown in FIG. Can be As shown in FIG. 4, the distribution information of the flying height δ and the pressure p is input to the arithmetic unit 10, and the arithmetic unit 10 outputs the strip 2 based on the input distribution information of the floating amount δ and the pressure p.
The distribution of the tension T in the width direction is calculated. At this time, the distribution of the tension T in the width direction of the strip 2 is as shown in FIG.
The flying height δ is small, and the tension T of the strip 2 on the side where the pressure p is large is high.

Accordingly, the distribution of the tension T in the width direction of the strip 2 can be detected by using the tension detecting device 21 having the above configuration.

In the tension detecting device 21 described above, pressurized air having a constant pressure is supplied from the air supply device 5 to the air chamber 6, and the distribution of the tension T of the strip 2 is determined based on the detection results of the gap sensor 8 and the pressure sensor 9. Was calculated, but
The pressure of the pressurized air supplied from the air supply device 5 to the air chamber 6 is adjusted so that the values of the flying height δ and the pressure p detected by the gap sensor 8 and the pressure sensor 9 become constant. Strip 2 based on the change in pressurized air
It is also possible to calculate the distribution of the tension T.

Next, equipment to which the above-described tension detecting device 21 is applied will be described with reference to FIGS.

FIG. 5 schematically shows a continuous annealing facility for cold rolled steel sheets to which the tension measuring device 21 is applied. This equipment
First and second payoff reels 32 for feeding out a steel sheet 31 as an entrance-side facility, a shear 33 for cutting the steel sheet 31, a welder 34 for welding the steel sheets, a steel sheet 31 prior to annealing.
An electrolytic cleaning section 35 for cleaning the steel sheet, an inlet looping tower 36 for looping the steel sheet 31 up and down, a furnace body section 37 composed of a heating zone, a soaking zone, a primary cooling zone, an overaging zone, and a final cooling zone. Outgoing looping tower 3 that forms a loop in steel plate 31 coming out of furnace body 37 as side equipment
8, a temper rolling mill 39 for tempering the steel sheet 31, a side trimmer 40 for trimming both ends of the steel sheet 31, an oiler 41 for supplying oil, a shear 42 for cutting the steel sheet 31,
First, the steel sheet 31 is wound and tension is applied to the steel sheet 31.
The second tension roll 43 and the steel plate 31
Is measured between the entrance-side looping tower 36, the rollers extending from the entrance-side looping tower 36 to the furnace body 37, the rollers extending from the furnace body 37 to the exit-side looping tower 38,
Outgoing looping tower 38, Outgoing looping tower 38
It is installed between the rollers from to the temper rolling mill 39, between the rollers from the temper rolling mill 39 to the side trimmer 40, and the like. FIG. 5 schematically shows a state in which the tension detecting device 21 is provided in the exit side looping tower 38. Is shown. In the figure, other places where the tension detecting device 21 can be installed are indicated by arrows.

In this facility, the tension at each point is measured by the tension detecting device 21 and the tension applied to the steel plate 31 is adjusted by adjusting the speed of the first and second tension rolls 43 according to the measurement result. Adjusted. If the tension detecting device 21 is movable as a unit, the device 21 can be moved to a desired location and the tension at that location can be measured.

FIG. 6 shows an example in which the tension detecting device 21 is applied to a reclining line. The recoiling line includes an uncoiler 51, a centering device 52, a pinch roll 53, a thickness gauge 54, a shear 55, a side trimmer 56, a welding machine 57, a leveler 58, a coil printer and an inspection table 59, an oiler 60, a shear 61, and a centering device. 62, deflector roll 6
3, a tension roll 64, and a tension measuring device is provided between the thickness gauge 54 and the shear 55, the coil printer and the inspection table 59, between the oiler 60 and the shear 61, and the like. FIG. 6 schematically shows a state provided in the coil printer and the inspection table 59. In the figure, other installation locations are indicated by arrows.

In this equipment, the tension at each point is measured by the tension detecting device 21 and the tension applied to the steel plate 31 is adjusted by adjusting the speed of the tension roll 64, for example, according to the measurement result.

FIG. 7 shows an example in which the tension detecting device 21 is applied to a tension leveler employing a small-diameter work roll. The tension leveler includes an entrance roll 71, an extension leveler 72, an anti-cabling unit 73, an anti-curling unit 74, and an exit roll 75. The tension detection device 21 includes an anti-curling unit 74, an exit roll 75, It is provided between. In this equipment, the tension applied to the steel plate 31 is adjusted by adjusting the speed of a winding device (not shown) according to the measurement result of the tension detecting device 21.

FIG. 8 shows an example in which the tension detecting device 21 is applied to a hot rolling facility. In this equipment, a slab 82 manufactured by a continuous casting device or the like (not shown) is heated and kept in a heating furnace 86. With this rough rolling the delivery side reversing continuously in line of the heating furnace 86 machine R _1, R _2, R ₃ are provided, in succession to the roughing mill R _1, R _2, R ₃ of the exit-side line And a finishing mill F is provided. A cooling device 87 is provided continuously to the finishing mill F, and the steel strip (steel plate) 31 that has been finish-rolled by the finishing mill F is cooled by the cooling device 87 and then wound into a coil by a winder 88. . In the figure, reference numeral 89 denotes a hot run table, and P indicates a pass line.

In the finishing mill F, a plurality of stands (seven stands in the illustrated example) of rolling mills F _{1 to} F ₇ are arranged in a row, and rolling rolls (work rolls) of the final stand rolling mill F ₇ among them.
The proximally out of 91, soft reduction rolls 92 of the pair of upper and lower ceramics (including ceramics sprayed) is the housing of the final stand rolling mill F ₇ are external, is arranged. The tension detecting device 21 is a rolling mill of a finishing mill F.
Between F ₁ to F _7, or a rolling roller 91 of the rolling mill F ₇ is the final stand is provided between the soft reduction rolls 92.

In this equipment, the tension applied to the steel strip 31 is uniformly adjusted by adjusting the rolling force of the rolling roll 91 in accordance with the measurement result of the tension detecting device 21, and the occurrence of meandering at the time when the tail end comes off is generated. Is prevented. Further, in the present equipment, in the above-mentioned rolling step, when the rear end of the strip 31 now passes through the rolling roll 91 of the rolling mill F ₆ immediately before the final stand in the finishing mill F, the strip 31 is removed. to sandwiched by two places with rolling rolls 91 and a pair of soft reduction rolls 92 of the final stand rolling mill F _7, to avoid the occurrence of narrowing by preventing meandering by the restraining effect. As a result, finishing mill can also be used high-speed steel roll rolling rolls 91 of the final stand rolling mill F ₇ of F, attained is prolonging the roll life.

[0029] The restraint effect, the distance between the rolling rolls 91 and a pair of soft reduction rolls 92 of the final stand rolling mill F ₇ is the shorter larger, in the present embodiment, the pair of soft reduction rolls 92 since externally to the housing of the final stand rolling mill F _7, it is possible to reduce the distance as much as possible, there is an advantage that existing housing becomes available.

In this embodiment, the final stand rolling mill is used.
Due to the provision of a pair of soft reduction rolls 92 on the outlet side of the F _7, conventionally, it can be shortened previously tail end length of the plate which has been rolled without tension, to improve the sheet thickness precision and the plate shape of the previous tail end I can do it. In other words, conventionally, at the start of finishing rolling in the final strip rolling mill of the steel strip or until the tip of the steel strip is wound by the winder,
The steel strip was rolled in a state where sufficient tension was not applied, and the thickness control during that time was sometimes unstable. However, in this embodiment, the light reduction of the steel strip 31 by the light reduction roll 92 was performed. Since the support is always performed during the finish rolling, the belt 31 is maintained in a state where sufficient tension is applied to the strip 31 even before the leading end of the strip 31 is wound by the winder 88. In addition, there is an effect that the shape control such as the control of the sheet thickness can be stably performed from immediately after the finish rolling of the strip 31 to just before the end.

In addition to the above, the present invention can be applied to all lines for producing strips, such as paper production facilities and film production facilities.

[0032]

According to the belt tension detecting device of the present invention, the rotating sleeve rotatably supported on the outer periphery of the fixed shaft via the fluid and rotating in contact with the belt, and the portion facing the belt. A gap state detecting means for detecting a state of a gap between the fixed shaft and the rotating sleeve, and a calculating means for calculating a tension of the band material based on a detection result of the gap state detecting means. The state of the gap between the rotating sleeve that rotates in contact with the fixed shaft is detected by the gap state detecting means, and the state of the gap detected by the gap state detecting means is analyzed by the calculating means to determine the tension of the strip. Can be. As a result, it is possible to easily and accurately detect the tension applied to the strip.

Further, in the tension detecting device of the present invention, since the gap state detecting means is a gap sensor for detecting the amount of the gap between the fixed shaft and the rotating sleeve in the axial direction, the width direction of the band-shaped material is changed. The distribution of tension along can be known. Further, since the gap state detecting means is a pressure sensor for detecting the pressure in the gap between the fixed shaft and the rotating sleeve in the axial direction, the distribution of the tension in the width direction of the strip can be known.

According to the steel strip manufacturing equipment provided with the strip-shaped material tension detecting device according to the present invention, it is possible to detect the tension applied to the steel strip and keep it properly. For this reason, it is possible to prevent defects in the steel strip, which is a product, and also to prevent the steel strip from being cracked or overlapped.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an apparatus for detecting the tension of a strip material according to an embodiment of the present invention.

FIG. 2 is a view taken along line II-II in FIG.

FIG. 3 is a view taken along line III-III in FIG. 2;

FIG. 4 is a block diagram of tension detection of the belt-shaped material tension detection device according to one embodiment of the present invention.

FIG. 5 is a schematic view of an embodiment in which the tension detecting device is incorporated in a continuous cold-rolled steel sheet annealing facility.

FIG. 6 is a schematic view of an embodiment in which the tension detecting device is incorporated in a recoiling line.

FIG. 7 is a schematic view of an embodiment in which the tension detecting device is incorporated in a tension leveler.

FIG. 8 is a schematic view of an embodiment in which the tension detecting device is incorporated in a hot rolling facility.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll 2 Strip steel (strip) 3 Fixed shaft 4 Rotating sleeve 5 Air supply device 6 Air chamber 7 Air ejection hole 8 Gap sensor 9 Pressure sensor 10 Computing device 21 Tension detecting device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaji Yoshikawa 4-2-2 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima In the Hiroshima Research Laboratory of Mitsubishi Heavy Industries, Ltd.

Claims (6)

[Claims] A rotating sleeve which is rotatably supported on the outer periphery of a fixed shaft via a fluid and rotates in contact with the band material, and a portion of the fixed shaft and the rotating sleeve which are opposed to the band material. A gap state detecting means for detecting a state of a gap between the belt members; and a calculating means for calculating a tension of the band material in accordance with a detection result of the gap state detecting means. . 2. The tension of a strip-shaped member according to claim 1, wherein said gap state detecting means is a gap sensor for detecting an amount of a gap between said fixed shaft and said rotating sleeve in an axial direction. Detection device. 3. The tension of a strip-shaped material according to claim 1, wherein said gap state detecting means is a pressure sensor for detecting a pressure in a gap between said fixed shaft and said rotary sleeve in an axial direction. Detection device. 4. The gap state detection unit according to claim 1, wherein the calculating unit detects the gap state based on a supply pressure value of a fluid supplied between the fixed shaft and the rotary sleeve. And a calculating function of calculating a tension of the strip based on a detection result detected by the means. 5. The apparatus according to claim 1, wherein the calculating means supplies a signal between the fixed shaft and the rotating sleeve based on a detection result detected by the gap state detecting means. And a calculating function for calculating the tension of the strip based on the supply pressure value of the fluid to be applied. 6. The tension detecting device according to claim 1, wherein the tension detecting device is provided in the middle of a running line of the steel strip, and the tension applied to the steel strip based on the tension obtained by the tension detecting device. The steel strip production equipment characterized in that the temperature is adjusted.