JP3102344B2 - Tension meter roll management method and its level gauge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a management method for managing a winding angle of a steel strip on a tension meter roll in a tension measuring device (tension meter) for a steel strip in a continuous process line, and a tension meter roll used in the method. It is about a level gauge.

[0002]

BACKGROUND OF THE INVENTION Problems to be Solved by the Invention
In a continuous process of processing steel strip such as a continuous annealing furnace, it is necessary to measure and control and control the tension of the steel strip.
This is the most important item for stabilizing operations. As a tension meter (tension meter) used in such a continuous process line, for example, as shown in FIG.
In general, a load cell 6 is attached to a lower portion of a bearing 5 of a sensing roll 4 provided between line rolls 2 and 3 that convey the steel strip 1, and a downward force applied to the sensing roll 4 is detected by the load cell 6. is there.

FIG. 5 (b) shows the measurement principle of a load cell type tensiometer. The tension applied to the steel strip 1 is T _1.
Assuming that the vertical load component applied to the sensing roll 4 when (N) is T ₃ (N), the tension T _{1 of the} steel strip 1 is calculated from the vertical load component T ₃ detected by the load cell 6.
Is geometrically determined as shown in the following equation (1).

T ₃ = T ₁ sin θ ₁ + T ₁ sin θ ₂ T ₁ = T ₃ / (sin θ ₁ + sin θ ₂ ) (1) θ ₁ , θ ₂ : Winding angles before and after the sensing roll T ₃ : Sensing Vertical load component applied to the roll In the equation (1), θ (= θ ₁ + θ ₂ ) is a winding angle (rad) at which the steel strip 1 comes into contact with the sensing roll 4, and as shown in FIG. The three roll installation positions of the sensing roll 4 and the line rolls 2 and 3 before and after the sensing roll 4 and the diameter of each roll are determined geometrically as shown by the following equation (2).

[0005]

(Equation 1)

As can be seen from equation (1), in order to accurately detect the tension, the winding angle θ needs to be accurate. As can be seen from the equation (2), the wrapping angle θ, ie, the accuracy of the wrapping angle, that is, the accuracy of the tension, is determined by the installation accuracy H, L of each tension meter roll according to the design value. .

[0007] Regarding the method of controlling the winding angle, three non-contact type distance meters are provided on a fixed member provided above the sensing roll, and the winding angle θ ( θ ₁ + θ ₂ ) (Japanese Patent Application Laid-Open No. 4-262215) and a tension measuring device (actually, a device that changes the winding angle of the steel strip around the sensing roll by raising and lowering a line roll before and after the sensing roll). Japanese Unexamined Patent Publication No. Sho 60-1508) has been proposed.

Although the above-mentioned conventional methods are all excellent, the former method of providing the distance meter above the sensing roll involves disposing three distance meters on a fixed member installed above the roll. However, it is practically difficult in a normal continuous process line due to restrictions on equipment arrangement. Also, in the latter method of elevating and lowering the line rolls before and after the sensing roll, there is inevitably an accuracy error in the elevating device and the position detector, and the position accuracy of the rolls is worse than the installation accuracy of a normal non-elevating roll.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to install a tension meter roll by a relatively simple structure without introducing new equipment and sensors. It is an object of the present invention to provide a tension meter roll management method and its level gauge, which can measure the accuracy in microns and can accurately control the winding angle of a steel strip with respect to a sensing roll.

[0010]

As shown in FIG. 1 (a), a method for managing a tension meter roll according to the present invention is arranged between a plurality of line rolls for transporting a steel strip 1, and A sensing roll 4 for measuring tension, a load cell 6 for detecting a downward load T _{3 received} from a steel strip of the sensing roll, a winding angle θ of the steel strip with respect to the sensing roll, and a load measurement value T ₃ from the load cell.
In tension meter strip consisting of arithmetic processing means for calculating the tension T ₁ of the strip from, as shown in FIG. 1 (b), line roll 2 or 3 and the sensing roll 4
The roll is positioned horizontally at one of the roll positions and the roll
A base 13 having a reference surface 11 to be touched and the other roll
Position and the displacement in the direction perpendicular to the reference plane 11
Detector 1 having micrometer head 14 capable of measurement
5 and a level gauge 10 having a level 16
And the sensing roll 4 and the line rolls 2 before and after it,
The height difference between the 3 and measure, respectively therewith, characterized in that it manages the angle θ with the winding on the basis of the obtained height difference X.

The level gauge of the tension meter roll according to the present invention transports a steel strip as shown in FIG.
Between the line rolls 2 or 3 and the line rolls 2 and 3
Height difference from the sensing roll 4 that measures the tension of the steel strip by using
Is a level gauge 10 for measuring
Or a base 13 having a reference surface 11 which is positioned horizontally at one of the roll positions of the sensing roll 4 and the sensing roll 4 and is in contact with the roll peripheral surface, and the reference surface 11 which is positioned at the other roll position. It is characterized by comprising a detector 15 having a micrometer head 14 capable of measuring a displacement in a direction perpendicular to the level, and a level 16 .

In the above configuration, the shape of the level gauge 10 is, for example, as shown in FIG.
3 can be shaped so that the reference surface 11 abuts on the lower surface of the line roll 2 and the tip of the micrometer head 14 of the detection unit 15 abuts on the upper surface of the sensing roll 4. The level gauge 10 in which the height direction distance between the micrometer head 11 and the measurement surface of the micrometer head 14 is adjusted to the reference roll height difference X ^* is set horizontally on the roll, and the actual amount ΔX of the micrometer head 14 The roll height difference X (= X ^* ± ΔX) is obtained. As a result, the height difference X of the roll is accurately measured (in units of microns). From the height difference X, the variable H of the above-mentioned equation (2) is obtained using the following equation (3).

[0013] _{H = D 1/2 + D} 2/2-X ......... (3) D 1: Line roll 2 with a diameter D _2: the diameter H of the sensing roll 4: the height difference between the center of each tension meter roll (2) Equations (1) and (2) are used to obtain θ ₁ and θ ₂ from H ₁ , H ₂ , L ₁ , L ₂ , D ₁ , and D ₂ , and tension (T ₁ ) is obtained from θ ₁ , θ ₂ , and T ₃ by equation (1). Can be.

From the above, since the height difference between the two tension meter rolls can be accurately measured in micron units, it is possible to control the installation accuracy when replacing the tension meter rolls in micron units. Conventionally, when replacing a tension meter roll, the installation accuracy of each tension meter roll using a general scale has been confirmed.In this conventional method, the control is performed in units of mm at most, and as in the present invention, the control is performed in units of microns. Can't manage. For example, in the case of the roll arrangement as shown in FIG. 4, when the line roll 2 is shifted by 1 mm from the reference position, the following Table 1 is obtained.

[0015]

[Table 1]

Each tension meter roll has a reference value of 10 m.
Even if it is installed in m ways, there is actually nothing to confirm that it is really so, so actually 9 mm or 11
mm. At that time, an error of about 8% occurs as the actual tension. This error has a great adverse effect on quality and operational stability in a continuous process. According to the present invention, such an error can be eliminated.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in the drawings. This is an example of a level gauge for accurately measuring the height difference between two tension meter rolls of a three-roll tension meter roll in units of microns, and FIG. 1 shows a steel strip by a tension meter according to the present invention. The tension measurement state and the level difference measurement state by the level gauge are shown. FIG. 2 shows an embodiment of the level gauge according to the present invention. FIG. 3 shows a configuration of a micrometer head according to the present invention and a mounting portion thereof.

In FIG. 1 and FIG. 2, the level gauge 1
0 is an example of measuring the height difference X between the lower surface of the line roll 2 or 3 and the upper surface of the sensing roll 4, and is mainly a plate-like base on which upper and lower reference surfaces 11 and 12 with high surface accuracy are formed. 13, a plate-shaped detection unit 15 provided with a micrometer head 14, and a level 16 provided in the detection unit 15. The base 13 is positioned horizontally below the line roll 2 or 3 as a whole, and the detection is performed. The portion 15 is shaped so as to be positioned horizontally above the sensing roll 4. The level gauge 10 is not limited to this, and may be configured to measure a height difference X between the upper surface of the line roll 2 or 3 and the upper surface of the sensing roll 4.

The base 13 is a substantially rectangular plate having a thickness of about 12 mm and integrally formed with a connecting piece 13a extending obliquely upward, and the detection section 15 is a linear member having a thickness of about 6 mm. The connecting piece 13a is attached to the end of the detection unit 15 and fixed to the rivet by spot welding. The base 13 is provided with a rubber band hook 13b to which a rubber band for fixing is attached and a pin 13c.

The upper reference surface 11 is in contact with the lower surface of the line roll 2 or 3, and the micrometer head 14 is located above the sensing roll 4. However, the micrometer head 14 can cope with different roll pitches P ₁ and P ₂ . The micrometer head 14 sends a predetermined distance P ₁ · P from the reference point O to the detection unit 15.
_Two are arranged with two. The level 16 is a special-grade product, and is fixed to the upper surface of the detection unit 15 at an intermediate portion between the two micrometer heads 14.

As shown in FIGS. 2 and 3, the micrometer head 14 includes a spindle 14a, a thimble 14b with a display, and a friction (ratchet) stop 1
4c (movable range: 25 mm, minimum scale: 0.01 mm), the lower part of which is attached to the moving member 18 by the attaching member 17. The moving member 18 is a detection unit 15
Are engaged with a pair of left and right guides 19 fixed to the surface of the base member by a fixing pin and spot welding with a knife edge, and are movably supported in a vertical direction orthogonal to the reference surfaces 11 and 12. Also,
The moving member 18 has a pair of vertically elongated bolt holes 20 formed on the left and right, and can be fixed at an arbitrary position in the vertical direction by tightening a fixing bolt (screw) 21 inserted through the bolt hole 20. I have.

The level gauge 10 having the above configuration is used as follows. Now, for example, line roll 2
And the case where the height difference X of the sensing roll 4 is 14 mm is the reference value.

(1) First, as shown in FIGS. 6A and 6B, a reference having a height corresponding to the sum Y of the height Z of the base portion 13 of the level gauge 10 and the reference roll height difference X ^*. Block 22
(Surface finishing accuracy is about ± 5 μm). For example, when the height Z of the base 13 is 25 mm, the reference block 22 has a height of 39 mm.

(2) As shown in FIG. 6 (c), the reference block 22 is placed on a pedestal 23 having a surface with good flatness, and the reading of the micrometer head 14 is set to 2 mm. The micrometer head 14 is set on the detection unit 15 while being placed on the pedestal 23. Next, after confirming that the level 16 is horizontal, the micrometer head 14, that is, the moving member 18 is fixed to the fixing bolt 2.
1 to the detection unit 15.

(3) Next, the prepared level gauge 10 is applied to the actual line roll 2 and the sensing roll 4 as shown in FIG. Is fixed to the line roll 2.

(4) The spindle 14a in contact with the upper surface of the sensing roll 4 of the micrometer head 14 is moved forward and backward so that the level 16 becomes horizontal. The reading of the micrometer head 14 when the level 16 is horizontal (± 2 minutes of the setting of 2 mm) is the deviation ΔX from the reference value.

(5) When the deviation ΔX from the reference value is known,
Since the actual height difference X between the line roll 2 and the sensing roll 4 is 14 mm ± ΔX, the winding angle θ ₁ can be obtained using the equations (3) and (2). By performing the same measurement for the line roll 3, the winding angle θ ₂
Can be requested.

By using the level gauge 10, it is possible to accurately measure the degree of deviation of each tension meter roll from the reference position up and down in units of microns, and from this the actual winding angle can be measured. Therefore, the tension can be accurately detected. Table 2 shows the effect of the present invention in the example of the roll arrangement in FIG.

[0029]

[Table 2]

As described above, the micrometer, level,
Judging from the accuracy of the reference block and pedestal, the detection accuracy of the tension meter roll level gauge is often ± 100μ
Considering the case of m (± 0.1 mm), the present invention has 10 times higher accuracy than the conventional method using a general scale.

[0031]

According to the present invention, the height difference between the sensing roll and the line rolls before and after the sensing roll is measured by a level gauge equipped with a micrometer head, and the winding angle is managed based on the obtained height difference. Thus, the following effects are obtained.

(1) The installation accuracy of the tension meter roll can be measured in micron units with a relatively simple configuration without installing new equipment (distance meter, roll elevating equipment, etc.) as in the past. Thus, accurate measurement can be performed at low cost.

(2) It is possible to accurately measure, in micron units, how much each tension meter roll deviates from the reference position in the vertical direction. Can be measured with high accuracy, which can greatly contribute to stabilization of product quality in a continuous process line.

[Brief description of the drawings]

FIG. 1 is a tension meter according to the present invention,
(A) is a front view showing a tension measurement state of a steel strip, and (b) is a front view showing a measurement state of a height difference using a level gauge.

FIG. 2 is an embodiment of the level gauge according to the present invention, wherein (a) is a front view and (b) is a plan view.

FIG. 3 is a perspective view showing a micrometer head of a level gauge according to the present invention and a mounting portion thereof.

FIG. 4 is a schematic diagram showing an example of the arrangement of tension meter rolls.

5A is a front view showing an example of a tension meter in a continuous process line, FIG. 5B is an explanatory diagram of a measurement principle of a load cell type tension meter, and FIG. 5C is an explanatory diagram of a winding angle of a steel strip. .

6A is a front view showing a state in which a level gauge is attached to a roll, FIG. 6B is a perspective view showing a reference block,
(C) is a front view showing a set state before measurement of the level gauge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Steel strip 2, 3 ... Line roll 4 ... Sensing roll 5 ... Bearing 6 ... Load cell 10 ... Level gauge 11, 12 ... Reference plane 13 ... Base 14 ... Micrometer head 15 ... Detector 16 ... Level 17 ... Mounting member 18 moving member 19 guide 20 bolt hole 21 fixing bolt 22 reference block 23 pedestal 24 rubber band

──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. ⁷ identification code FI G01L 5/10 G01L 5/10 Z (56) References JP-A-6-273174 (JP, A) JP-A-7-40198 ( JP, A) Japanese Utility Model Showa 60-1508 (JP, U) Japanese Utility Model Showa 58-4004 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01L 5/06 B21C 51/00 C21D 9/56 101 C21D 11/00 105 G01B 5/00-5/30 G01L 5/10 G01B 21/00

Claims (2)

(57) [Claims] 1. A sensing roll disposed between a plurality of line rolls for conveying a steel strip and measuring a tension of the steel strip;
A load cell for detecting a downward load received from the steel strip of the sensing roll, and a steel strip comprising arithmetic processing means for calculating a tension of the steel strip from a winding angle of the steel strip with respect to the sensing roll and a load measurement value from the load cell. In the tension meter, one of the line roll and the sensing roll
The reference surface, which is positioned horizontally at the
Having the base and the reference surface positioned at the other roll position
Micrometer head that can measure displacement in the direction perpendicular to
Level gauge equipped with a detector having a level and a level
Used, the height difference of the sensing roll and its front and rear lines rolls measure, respectively it, resulting management of the tension meter roll, characterized in that managing angle with the winding on the basis of the height difference. 2. A line roll for conveying a steel strip, and a line
With a sensing roll that measures the tension of the steel strip between the rolls
This is a level gauge that measures the height difference.
A base having a reference surface horizontally positioned at one roll position of the sensing roll and abutting against the roll peripheral surface;
Tension meter roll level gauge, characterized in that it comprises a detection unit having a micrometer head located on the other roll position can measure the displacement of the direction perpendicular to the reference plane, and a spirit level.