JPS61147923A - Method and equipment for coiling strip - Google Patents

Abstract

PURPOSE:To prevent the generation of noises due to the collision of mandrel with roll and the damages of device by varying the pressing command value of a wrapper roll according to the thickness of the strip wound on mandrel. CONSTITUTION:The number (n) of coils of a strip S is found by arithmetic unit 13 after the tip position of the strip being detected. This coils number s and the set number N of coils are compared. In case of n+1<N a selective means 16 is switched so that the weak pressing force transmitted from a pressing setter 14 is set to a pressing force setter 18 by operating a changeover device 17. In case of n+1>=N the wrapper roll 2 is pressed by the pressing force corresponding to the late thickness of the strip S. In case of n+1<N the pressure liquid to feed to the liquid pressure cylinder 7 by the selecting means 20 of the jumping quantity is controlled to jump the wrapper roll 2.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a method for controlling the pressing of the wrapper roll after avoiding the step when winding a strip and starting step avoidance control according to the wear of the wrapper roll and mandrel. The present invention relates to a method and device for winding a strip in which force can be adjusted.

[Conventional technology]

A winding machine that has been commonly used since the craftsmanship is explained with reference to Fig. 3. (1) is a mandrel, around which a plurality of wrapper rolls (2) are arranged. 1) It passes between trapper rolls (21) and is wound into a coil around a mandrel (11).

As is clear from Fig. 4, which is an enlarged view of the part shown in Fig. 3, In the IJ tube (81) of the wound portion, the radius of the coil changes suddenly and a step (4) occurs.

A conventional winding machine uses a hydraulic cylinder to roll a roll system such as a wrapper roll (2) and a roll bearing frame (not shown), each weighing several tons, into a coiled strip (
Since it is configured to press against the IJ tube (S), when the step (4) passes through the wrapper roll (2), the wrapper roll (2) is violently thrown up and a large impact force is applied to the IJ tube. (give to 81, and for this reason the strip (
There is a risk of overlapping scratches occurring at the step (4) in S), and the wrapper roll mechanical system may also be damaged due to the impact load.

Therefore, in order to eliminate the above-mentioned problem, it is necessary to remove the step (4) created by the tip (3) of the strip (S).
The position of the step (4) is detected, and before the step (4) passes through the wrapper roll (2), the wrapper roll (2) is prejumped away from the strip (81) by the thickness of the strip (S). (4) is the wrapper roll (2
) After passing through the strip (Sl), the wrapper roll (2) can be pressed against the strip (Sl.) By controlling the rat roll (2) in this way, the wrapper roll (2)
The strip (S) will not be suddenly lifted up, and as a result, generation of excessive load on the strip (S) can be prevented.
No scratches will occur on the strip (S). Also, since the wrapper roll (2) and the strip (Sl) are in a non-contact state only for a very short time before passing the step (4), the strip (S) should be wound around the mandrel (1) sufficiently early. It becomes possible to attach it.

By the way, in the above-mentioned conventional device, the mandrel (1) and the wrapper roll (2) are formed by winding the strip (S).
As shown in Figure 5, there is step wear on the surface (5) (6).
occurs. The movement of the wrapper roll (2) when winding a strip (Sl) using the mandrel (1) and wrapper roll (2) in which such step wear (5) (6) has occurred will be explained with reference to FIG. 6 and the like. That is, when the wrapper roll (2) given the initial gap G1 reaches the predetermined position of the strip (81), the wrapper roll (2) becomes the strip tSl.
However, the wrapper roll (2) cannot press the surface of the strip (S) because there is step wear (51 (6)) on the roll (1) and the wrapper roll (2). When the strip tS+ is wound once and the stepped portion reaches a predetermined position, the strip base end position is detected, and based on the detection signal, the wrapper roll (2) jumps from A as a base point, and the stepped portion reaches the wrapper. After passing through the roll (2) part, the wrapper roll (2) is moved to the strip 1811111, but as mentioned above, due to step wear, the wrapper roll (2) cannot press the surface of the strip (S). When the roll is wound up and the stepped portion comes to a predetermined position, the tip position of the sl-IJ knob is detected, and based on the detection signal, the wrapper roll (Se) jumps from the mouth as a reference point, and the stepped portion reaches the wrapper roll ( After passing through part 2), it is moved to the strip (S) side.

In this way, the wrapper roll (2) repeatedly jumps and presses, and the product of the plate thickness H and the number of turns of the IJ knob (s) is the initial gap G1 and step wear (5) (6
) wear amount M1. M! If it exceeds the sum of , that is, 艮
H) G, ten bites + M.

When the wrapper roll (2
) is pressed against the surface of the strip (81) and winding of the strip (Sl) begins. In FIG. 6, AI, A!g...An are wrapper rolls (2).
The process of moving the strip to the 81 side, Bl+B!s
...B.

is a step of controlling the wrapper roll (2) at a constant pressure; c.
lcm, . . . Cyu indicates a jumping process, and postscript indicates the movement of a predetermined one of the plurality of wrapper rolls in FIG. 3 or the wrapper roll.

[Problem that the invention seeks to solve]

However, in the conventional device described above, the IJ tube (81
Since the wrapper roll (2) is designed to jump even when the number of turns is such that it cannot be held down, the non-wearing parts at both ends of the wrapper roll (2) and the non-wearing parts at both ends of the mandrel (1) will not collide. , may generate noise or damage the equipment.

The present invention has been made in view of the above-mentioned circumstances, and is intended to prevent large noise from being generated or damage to the apparatus even if the wrapper roll hits the mandrel.

[Means for solving problems]

The present invention provides winding equipment that includes a wrapper roll that presses down the strip wound around the mandrel, and performs step avoidance control by jumping the wrapper roll to avoid collision with the step formed at the tip of the strip. If the thickness of the wound strip is smaller than the gap created between the wrapper roll and mandrel due to wear, the command value for pressing the wrapper roll should be reduced, and the thickness of the strip wound around the mandrel will be smaller than the gap created between the wrapper roll and mandrel due to wear. If the gap is larger than the generated gap, the command value for pressing the wrapper roll is increased.

[For production]

Therefore, in the present invention, when the number of windings is less than a predetermined number, the wrapper roll is pressed with a small force, and when the number of windings is more than a predetermined number, the wrapper roll is pressed with a force commensurate with the plate thickness. It is pressed by.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows one embodiment of the present invention in which a plurality of wrapper rolls (
2) are each equipped with a fluid pressure cylinder (7) for moving the wrapper roll (23) close to and away from the mandrel (1).
] is connected to the fluid pressure cylinder (7), and a servo valve (
8) can be supplied with pressurized liquid.

Upstream of the mandrel (1), there are upper and lower pinch rolls (9) for feeding the strip fS) to the mandrel (1).
) αO is provided, and the lower pinch roll αO is equipped with a speed detector αη for detecting the feed speed V of the strip (81).
is connected, and the strip tip position detector (2) is connected to the output side of the upper and lower pinch rolls (9) (a), and the detector a
A signal can be sent from η(2) to the arithmetic unit (to).

For pressing the wrapper roll (2) with a weak force, a force setting device α is provided, and for pressing appropriate for the strip thickness, a selection means (G) is provided on the output side of the force setting device (T). , the selection means (6) is switched by a switching device αη operated by a command signal from the calculation device (to), and the pressing can set the setting signal from the setting device I or (2) to the force setting device (to). It looks like this.

For pressing, a selection means is disposed on the output side of the force setting device (to) and the jump setting device α field, and the selection means QCJ is operated by a switching device Q operated by a command signal from an arithmetic unit (to). The setting signal can be sent to the servo valve (8) via the servo amplifier. In addition, the calculation device (2) stores, for example, the diameter D1 of the mandrel (1).
Thickness of the strip (Sl) H1 Initial gap G8 between the mandrel (1) and the wrapper roll (2), Amount of wear of the mandrel (1) M, Amount of wear of the wrapper roll (2)
Distance L1 from the IJ knob tip position detector (2) to the wrapper roll (2) located on the most upstream side ) The number of turns of IJ tube (S), that is, the mandrel (
1) and the wrapper roll (2) to close the gap due to wear It has become.

Now, considering the winding length of the strip (S) wound on the mandrel (1), referring to Fig. 2, 1st roll: L, = πD 2nd roll: L, = π(f) -+2H) 3rd roll; L, = π (D+ 4 H) 2nd roll; L1 = π (D + 2 (empty - 1) H), so by the 2nd roll the mandrel (strip wound on 11) The winding length LrL of is Ln=nπD+Σ 2(r
L-1) H--- (1) L=1.

On the other hand, when the strip tip position detector (6) detects the tip position of the IJ knob (S), the speed signal V of the strip (8) is continuously detected and sent to the arithmetic unit (to). S) The elapsed time t after the detection of the tip position of the IJ knob 0) is detected. Therefore, after the elapsed time t after the start of operation, the strip wound on the mandrel (11)
The winding length is L = V X t - L...
・---(il). Therefore, Ln in equation (1) and (
11) Since Bi in the equation is equal, r>yrD+Σ 2(rL-1) H=V x t-L
”...(Ill)r#5-1 is established, and from this formula (III), the arithmetic unit calculates the number of turns of the strip (S), and compares this number of turns with the set number of turns N. If n + 1 × N................... tiv), press the wrapper roll (2) weakly with force, and n+1≧N...... ( In the case of Vl, the wrapper roll (2) may be pressed with a force commensurate with the thickness of the strip (S).

Therefore, when the tip of the strip (81) is detected after detecting the strip tip position and control is started, the arithmetic unit (to) calculates the center using the set of It is calculated whether the formula holds true.

Then, when the jaw +1 (N), the switching device αη is activated by the command signal from the arithmetic unit (to), and the pressing is performed at the force setting m.
(For weak pressing from 14, the selection means (7) is switched so that the pressing force is set in the force setting device (G),
A command signal is output from (to) to the switching device (Q) at a required time interval, and the selection means sends the setting signal of the pressing force setting device (g) to the servo via the servo amplifier at a predetermined time interval. It is alternately switched to reach the valve (8) and send a setting signal for the jump amount setting vs (to) to the servo valve (8) via the servo amplifier. Therefore, as shown in FIG. 6, the wrapper roll (2) has an initial gap G1 set, and the gap between the mandrel (1) and the wrapper roll (2) at the strip winding section is G, + M, + M,
From the state of , the mandrel (
1) The process of approaching to the side, then being controlled at a constant pressure, and then jumping is repeated. At this time, wrapper roll (
2) cannot press the strip (S), and the non-wearing part of the wrapper roll (2) comes into contact with the non-wearing part of the mandrel (1), but the pressing force is weak and the pressing force is low, causing noise and noise. No equipment damage will occur.

The setting device o4QCJ outputs the servo valve (8
), the servo valve (8) is appropriately controlled, thereby controlling the flow rate and pressure of the liquid supplied to the fluid pressure cylinder (7), and the wrapper roll (2) performs the above-mentioned movement. .

If the above control is continuously performed and the calculation result of the calculation device (to) satisfies equation (v), that is, the gap between the worn parts of the mandrel (1) and the trapper roll (2) is filled by the strip (Sl). In this case, the switching device αη is actuated by a signal from the arithmetic unit (To) and switches the selection means (G).For this reason, the pressing force appropriate for the plate thickness is set to 1Ti (To). As described above, the selection means is switched alternately at predetermined time intervals, so that the wrapper roll (2) moves toward the mandrel (1), controls the constant pressure to press the strip (81) with a large force, and jumps. The process is repeated until the strip (S) is wound.

As mentioned above, the wrapper roll (2) is
), the wrapping force of the wrapper roll (2) is soft at the stage when the wound strip cannot be pressed, so that the non-wearing part of the wrapper roll (2) is pressed against the non-wearing part of the mandrel (1). Even in the event of a collision, the impact is small, so no loud noise is generated or the device is damaged.

In addition, in the implementation of the present invention, the movement of one wrapper roll has been described, but other wrapper rolls can be controlled in the same way, operation can be started from an initial gear position of zero, and other features. It goes without saying that various changes may be made without departing from the spirit of the invention.

〔Effect of the invention〕

According to the strip winding method and device of the present invention,
Since the wrapper roll is pressed against the mandrel with a weak force, it does not make a lot of noise, creating a good working environment, preventing damage to the machine, shortening the downtime of the line, and improving production efficiency, etc. Various excellent effects can be achieved.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an embodiment of the present invention, and Fig. 2 is a diagram showing the mandrel diameter and speed when winding a strip according to the present invention.
An explanatory diagram of the IJ tongue plate thickness, Fig. 5 is an explanatory diagram of the conventional example, Fig. 4
The figure is a detailed view of the ■ section in Figure 3, Figure 5 is an explanatory diagram of the conventional method for winding a strip using a worn mandrel and wrapper roll, and Figure 6 is a diagram showing the mandrel and wrapper roll shown in Figure 5. It is an explanatory view of movement of a wrapper roll when winding up a whelk. In the figure, (1) is a mandrel, (2) is a wrapper roll, (
5) (6) is step wear, (7) is fluid pressure cylinder, (
8) is the upper pinch roll, Sono is the lower pinch roll, αη is the speed detector, (c) is the strip tip position detector, (to)
is a calculation device, (14) (to) is a force setting device for pressing, (g)
1 is a selection means, .alpha. is a switching device, (g) is a force setting device, 1 is a jump amount setting device, 1 is a switching device, and Qυ is a switching device.

Claims (1)

[Claims] 1) Winding equipment that includes a wrapper roll that presses down the strip wound around a mandrel, and performs step avoidance control by jumping the wrapper roll to avoid collision with a step formed at the tip of the strip. A strip characterized in that when the number of turns of the strip wound on the mandrel is less than a predetermined number, a small pressing force is applied to the wrapper roll, and when the number of turns of the strip wound on the mandrel is greater than a predetermined number, a pressing force commensurate with the number of turns of the strip to be wound is applied. Winding method. 2) In winding equipment that is equipped with a wrapper roll that presses down the strip wound on a mandrel and performs step avoidance control by jumping the wrapper roll to avoid collision with a step formed at the tip of the strip, it is possible to control the position of the strip tip. A position detector detects the feed speed of the strip, a speed detector detects the feed speed of the strip, and a predetermined calculation is performed based on the signals from the position detector and the speed detector to determine whether the number of turns of the strip is greater than the predetermined number of turns. A desired arithmetic device, a selection means that is switched by a signal from the arithmetic device and selects a preset small pressing force and a large pressing force, and a pressing force that is switched by a signal from the arithmetic device and selected in advance by the selection means. A strip characterized in that it is provided with selection means for selecting force or jump amount, and a control valve for controlling the pressure fluid supplied to the fluid pressure cylinder connected to the wrapper roll based on a command signal from the selection means. winding device.