JP2513632Y2 - Metal band tension stabilizer in process line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] This invention prevents fluctuations in the tension of a metal strip at the inlet or outlet of a process line, for example, a furnace such as a continuous annealing furnace, surface treatment equipment, and plating equipment. The present invention relates to a metal band tension stabilizer in a process line for stabilizing the tension of a metal band in a process.

[Prior Art] A looper is installed on a process line, for example, on the inlet side and the outlet side of a continuous annealing furnace in order to continuously feed a steel strip into the furnace and continuously discharge it from the furnace. FIG. 6 is an explanatory diagram showing the relationship between these loopers and the continuous annealing furnace. An inlet side looper 24 having bridle rolls 22 and 23 arranged at the front and rear is provided on the inlet side of the continuous annealing furnace 21. The entry-side looper 24 includes a fixed roll 25, a carriage 26 that can move up and down, and a moving roll 27 that is rotatably attached to the carriage 26. As the carriage 26 moves up and down, the steel strip 28 is stored in a loop. I am paying out.

Further, on the outlet side of the continuous annealing furnace 21, an outlet looper 34 having bridle rolls 32 and 33 arranged at the front and rear is also provided. The exit-side looper 34 also includes a fixed roll 35, a carriage 36 that can move up and down, and a moving roll 37 that is rotatably attached to the carriage 36, and operates in the same manner as the entrance-side looper.

In the looper as described above, when the carriage moves up and down to receive the metal strip, the tension of the metal strip inside the looper fluctuates due to the mechanical loss of the looper and the inertia of the looper roll. Propagate to. Due to this change in tension, meandering or drawing occurs in the metal strip in the process line.

Conventionally, in order to prevent the fluctuation of the tension from propagating into the process line, there is a technique of using a dancer roll driven by a torque motor to control the tension of the metal strip to a constant tension.

[Problems to be Solved by the Invention] However, in the conventional technique of controlling the tension of the metal strip to a constant tension by using a dancer roll driven by a torque motor, the followability is poor due to the inertia of the dancer roll or the like. However, it was not possible to completely prevent the tension fluctuation from propagating in the process line.

This invention solves the above-mentioned problems of the prior art and provides a metal band tension stabilizer for a process line, which absorbs the tension fluctuation of the metal band so that the tension fluctuation does not propagate into the process line. It is an object.

[Means for Solving the Problem] A metal strip tension stabilizer in a process line according to the present invention includes a tension detector for detecting a tension applied to a metal strip, and a tension signal received from the tension detector. Pressure change amount calculation means for calculating the pressure change amount according to the change amount, metal band storage means for storing a metal band in a horizontal loop shape by an operating cylinder, and the metal based on a command from the pressure change amount calculation means. It is a metal strip tension stabilizing device in a process line, which comprises operating cylinder pressure control means for changing the pressure of the operating cylinder of the strip storage means.

[Operation] A metal strip tension stabilizer in a process line according to the present invention detects a tension applied to a metal strip, and receives a tension signal from the tension detector to respond to a change amount of the tension signal. Pressure change amount calculation means for calculating a pressure change amount, metal band storage means for storing a metal band in a horizontal loop shape by an operating cylinder, and an operating cylinder of the metal band storage means based on a command from the pressure change amount calculation means And operating cylinder pressure control means for changing the pressure of the cylinder. Then, when the carriage of the looper moves up and down and the tension of the metal strip fluctuates, the tension signal from the tension detector causes a pressure for activating the working cylinder of the metal strip storage means in order to cancel the tension fluctuation. A change amount is calculated by the pressure change amount calculating means, a pressure change command is issued from the pressure change amount calculating means to the working cylinder pressure control means, and the working cylinder pressure is changed by the working cylinder pressure control means to form a loop shape. The tension fluctuation is canceled by changing the shape of the horizontal loop of the metal strip stored in.

The metal strip storage means used for this metal strip tension stabilizer in the process line is designed to cancel the tension fluctuation by changing the loop of the horizontal loop by the operating cylinder, so that the responsiveness is good and the tension fluctuation is within the process line. It can be prevented from propagating.

[Embodiment] A metal band tension stabilizer for a process line according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is an explanatory view showing the apparatus constitution when the metal strip tension stabilizer in the process line of one embodiment of the present invention is applied to the inlet side of the continuous annealing furnace 21, and FIG. 2 is the metal in the process line. It is a control system diagram of a belt tension stabilizer. A tension stabilizer for a metal strip in a process line according to an embodiment of the present invention detects a tension acting on a metal strip 28 and a tension signal from the tension detector 1 to detect a change amount of the tension signal. Pressure change amount calculation means 2 for calculating a pressure change amount according to the above, and a metal band storage means 5 for storing the metal band 28 in a horizontal loop shape by an air actuated cylinder 4 having a metal band wrapping roll 3 at the tip.
And a working cylinder pressure control means 6 for changing the pressure of the air working cylinder 4 of the metal band storage means 5 based on a command from the pressure change amount calculating means 2.

Next, a method for stabilizing the tension of the metal strip 28 by the metal strip tension stabilizing device in the process line according to the first embodiment of the present invention will be described with reference to FIG. Inlet looper 24 of continuous annealing furnace 21
When the internal tension decreases, the tension detector 1 detects the tension and sends the signal to the pressure change amount calculation means 2.
The standard tension is set in advance in the pressure change amount calculation means 2 by the tension setter 7. The standard tension is compared with the sent tension signal, and the metal corresponding to the decrease amount of the tension from the standard tension is compared. A change amount of pressure applied to the air actuated cylinder 4 of the band storage means 5 is calculated, and a pressure change command is issued to the actuated cylinder pressure control means 6. Based on this command, the working cylinder pressure control means 6 operates the servo valve 9 provided in the compressed air supply pipe 8 to the air working cylinder 4.
Control to increase the set pressure of. As a result, a higher air pressure than before is supplied to the pressure chamber 4a of the working cylinder 4 via the two-way electromagnetic switching valve 10. Then, as the pressure in the pressure chamber 4a becomes larger than before, and the air in the pressure chamber 4b closes the two-way electromagnetic switching valve 11, the cylinder rod 4c compresses the air in the pressure chamber 4b while Chamber 4b
Move to the side. The metal strip storage means 5 is thereby
Since 28 will be stored, the slack of the metal strip 28 in the line is corrected, and the tension acting on the metal strip 28 approaches the standard tension.

When the tension in the entry side looper 24 of the continuous annealing furnace 21 is increased, the set pressure of the servo valve 9 is controlled to be low contrary to the case where the tension is decreased. As a result, a lower air pressure than before is supplied to the pressure chamber 4a of the working cylinder 4 via the two-way electromagnetic switching valve 10. And the pressure chamber 4a
Since the pressure is lower than before, the cylinder rod 4c moves to the pressure chamber 4a side by the compressed air pressure of the pressure chamber 4b. Since the metal strip storage means 5 thereby dispenses the metal strip 28, the excessive tension applied to the metal strip 28 in the line is relaxed, and the tension acting on the metal strip 28 approaches the standard tension. A pressure gauge 12 for checking whether or not an appropriate air pressure is obtained by controlling the servo valve 9 is provided, and the detected pressure signal is fed back to the operating cylinder pressure control means 6 so that an appropriate pressure is obtained. I am trying to get it.

The metal strip 28 accumulated in the metal strip storage means 5 is in a state of being pulled by the cylinder rod 4c even at the standard tension, and the two-way electromagnetic switching valve 10 is in the second position during operation.
It operates in the state shown in the figure, and each valve is switched only when repairing or the like. Also, the working cylinder 4
The pressure of the high-pressure air supplied to the device may be about 5 to 6 kgf / mm ² .

FIG. 3 is an explanatory diagram showing the meaning of using a compressible gas such as air as the pressure medium supplied to the working cylinder 4. That is, as shown in FIG. 3 (b), the pressure of the compressed air supplied to the pressure chamber 4 a of the working cylinder 4 increases or decreases depending on the change in tension. It plays the role of the spring 12 in a). Further, since the air in the pressure chamber 4b is in a hermetically sealed state, it repeatedly acts as a damper 13 in FIG. 3 (a) by repeatedly compressing and expanding due to the change in tension. With such a configuration, it is possible to exhibit the correction function extremely smoothly even for a fine tension fluctuation or a sharp tension fluctuation of the metal strip.

The pressure medium supplied to the working cylinder 4 may be a compressible gas instead of air. The actuating cylinder is arranged laterally in order to reduce inertia and to achieve smooth movement.

FIG. 4 is a perspective view showing a carriage 14 and a guide rail 15 which support the metal band winding roll 3 of the metal band storage means 5 and move together with the cylinder rod 4c. This dolly 14
A metal band winding roll 3 wound with a metal band 28 is rotatably supported by a bearing 16 on the upper surface of the. The legs of the carriage 14 are fitted on the guide rails 15, and the operating cylinder 4
As the cylinder rod 4c moves, the guide rail 15
It is designed to move back and forth along with. Then, as shown in FIG. 5 (a), a bush 18 is fitted in the portion contacting the guide rail 15 so that the mechanical loss is reduced. Alternatively, as shown in FIG. 5 (b), the cylindrical rail 18a and the tongue-shaped roller 18b may be interposed between the guide rails 15 to reduce mechanical loss.

The apparatus for stabilizing the metal band tension in the process line according to the first embodiment of the present invention has been described as applied to the inlet of the continuous annealing furnace, but the present invention is not limited to this, and the same furnace, surface treatment equipment and plating are used. Even if it is applied to the entrance and exit of equipment, the same effect can be obtained.

[Effect of the Invention] With this invention, the tension of the metal strip in the process line can be stabilized, and meandering or drawing does not occur in the metal strip.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the apparatus configuration when the apparatus for stabilizing the metal band tension in the process line of one embodiment of the present invention is applied to the inlet side of a continuous annealing furnace, and FIG. 2 is the method for stabilizing the metal band tension in the process line. FIG. 3 is a control system diagram of the apparatus, FIG. 3 is a functional explanatory view of an operating cylinder, FIG. 4 is a perspective view of a metal band winding roll support carriage and a guide rail, and FIG. 5 is a structure of a contact portion between the support carriage and the guide rail. FIG. 6 is an explanatory diagram showing the structure of a conventional continuous annealing furnace. DESCRIPTION OF SYMBOLS 1 ... Tension detector, 2 ... Pressure change amount calculation means, 4 ... Working cylinder, 5 ... Metal band storage means, 6 ... Pressure control means.

Continuation of the front page (56) Reference JP-A-58-177452 (JP, A) JP-A-52-71320 (JP, A) JP-A-1-165726 (JP, A)

Claims (1)

(57) [Scope of utility model registration request] 1. A tension detector for detecting a tension applied to a metal band, and a pressure change amount calculation means for receiving a tension signal from the tension detector and calculating a pressure change amount according to the change amount of the tension signal. A metal strip storage means for storing the metal strip in a horizontal loop shape by an operating cylinder, and an operating cylinder pressure control means for changing the pressure of the operating cylinder of the metal strip storage means based on a command from the pressure change amount calculation means. A metal band tension stabilizer in a process line, which is characterized by: