JPH1076417A - Multi-line slitter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a line length by rotation-driving a peripheral speed of roll rows substantially to conform it to a peripheral speed of a slitting cutter, and forming a loop respectively in a steel plate strip and a slit material in an in/out side of the slitting cutter. SOLUTION: As a system detecting respective loop height by loop height detecting sensors 7a, 7b, a rotation drive speed of each driving gear 3a, 4a, 5a can be controlled by a controller 6. For instance, when a loop height between a slitting cutter 3 and a deflector roll 5 is decreased, that is, approximated to a linear path, in the case of control with a peripheral speed of the slitting cutter 3 serving as the reference, by decreasing a peripheral speed of the deflector roll 5, a loop is deepened, and a slit material 23 is maintained in a condition with tension left as zero.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slitter line for, for example, slitting a thin steel strip into a plurality of strips and then winding the strips. The present invention relates to a slitter device in which a line length is shortened by eliminating a loop or the like for absorbing a noise.

[0002]

2. Description of the Related Art A slitter line for slitting has been conventionally used as an apparatus for using a steel strip for, for example, a lead frame for a semiconductor device. As shown in the schematic diagram of FIG. 3, the slitter line includes a plurality of cutter disks 52 for making a plurality of incisions in the width direction of the strip 51a from the steel sheet coil 51 held by the uncoiler.
A winding device 54 for winding the strip 5
1a is continuously transported to the cutter disk 52 side for slitting.

In such a slitter line, when processing is performed with one of the winding shafts 54a of the winding device 54, the strip 51a has a thickness deviation in the sheet width direction, that is, the edge side is closer to the edge side due to the rolling relationship. Therefore, the layer thickness of each strip 53 wound on the winding shaft 54a is the thickest on the center side. Therefore, the common winding shaft 54a
When winding each strip 53 in the winding shaft 54
Since the rotation speed of a is constant for all the strips 53, the outer diameter of the central strip 53 having a large thickness is changed to the edge-side strip 53.
Than the strips in the center part.
The winding torque for is maximized.

[0004] If the winding thickness of each of the strips 53 is different as described above, in order to prevent the winding of the strip having the maximum diameter from becoming loose, the rotation of the winding shaft 54a based on the maximum diameter is used. When the speed is set, the strip material 5 on the thinner edge side
In No. 3, since the winding outer diameter is small and the peripheral speed is smaller than the maximum diameter portion, winding cannot be performed in time, and the strip material 53 sags between the cutter disk 52 and the winding shaft 54a.

In order to eliminate the obstacle caused by the slack of the strip 53, conventionally, a tension generating device such as a tension pad 55 is arranged in front of the winding device, and the same tension is applied to all the strips after slitting. In addition, a looping pit 56 is provided on the work floor to absorb the deflection in the line.

However, if the tension pad 55 and the looping pit 56 are included in the line, not only the construction cost for installing the looping pit 56 is increased, but also the line becomes longer, which limits the reduction of the equipment occupied area. is there.

To solve such a problem, a loopless slitter system having a line configuration as shown in FIG. 4 has recently been adopted.

In this equipment, tension rolls 57a and 57b are arranged in a line sandwiching a cutter disk 52 arranged between a steel sheet coil 51 and a winding device 54, and strips 51a and strips 53 after slitting are arranged. Are wound while applying a uniform tension to each of them. The cutter disk 52 is an idler that rotates as the strip 51a travels, and has a so-called pull-cut line configuration in which slitting is performed simultaneously with the advance of the strip 51a to the winding device 54 side.

[0009]

In the case of such a pull-cut system, which is a facility that performs slitting while applying tension to the strip 51a and the strip 53, the deviation of the thickness in the width direction of the coil 51 of the steel sheet. Even if there is, no slack is generated in the strip member 53, so that the facility does not require a looping pit or the like.

However, in such a pull-cut type of slitting, tension is added when winding around the winding shaft 54a while braking the rotation of the uncoiler holding the steel plate coil 51, so that the traveling strip 51a The combined force of the acting force and the tension due to the traveling of the wheel is applied to the cutter disk 52. This not only increases the shear load of the strip 51a on the cutter disk 52, but also increases the reaction force of the cutter disk 52 on the strip 51a itself.

If the shear load on the cutter disk 52 or the shear reaction force on the strip 51a is large, the cutter disk 5
2 is easily damaged, and the stress on the slitting portion of the strip 51a also increases. Therefore, the damage of the cutter disk 52 causes a failure of the cut surface and shortens the life, and a large residual stress is generated in the slitted strip 53.
Will be deformed.

Since the pull-cut type equipment does not require a looping pit, the line equipment can be simplified, but the life of the cutter disk 52 is shortened, and the shape of the edge of the strip 53 after slitting is poor. Is generated. For this reason, the accuracy of the slitting width tends to be relatively low, and in fact, it can be applied only to thick plate slitting or coarse slitting that does not require high dimensional accuracy.

The problem to be solved in the present invention is to provide a facility which enables winding from slitting with a short line length and which can satisfactorily slit a strip without deterioration in shape. .

[0014]

SUMMARY OF THE INVENTION The present invention provides a slitting cutter for cutting a steel strip or the like into a plurality of strips,
In a slitter line provided with a winding device arranged downstream thereof and winding while adjusting the pulling tension of each strip, on each of the upstream side and the downstream side of the slitting cutter, a steel sheet strip and each of the slitted ones. A row of rolls is provided to feed the strip material in the passing direction. The circumferential speed of these rolls is almost equal to the circumferential speed of the slitting cutter so that the strip can be driven to rotate, and the entrance and exit sides of the slitting cutter. Is characterized in that a loop can be formed in each of the steel plate strip and the strip.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Rolls arranged on the entrance and exit sides of a slitting cutter may be pinch rolls for conveying the upper and lower surfaces of a steel strip by narrowly pressing them, or for a strip after slitting. A deflector roll with a reduced degree of narrow pressure can be obtained. And, for example, if the peripheral speed of the pinch roll is slightly faster than that of the slitting cutter, the steel strip can have a loop between them, and similarly, the peripheral speed of the deflector roll is slightly less than that of the slitting cutter. If it is made slower, the strip can have a loop.

In addition to the formation of such a loop, a small loop is provided in advance on the pinch roll and the slitting cutter and each steel plate strip and strip between the slitting cutter and the deflector roll at the time of passing. If the peripheral speeds of the pinch roll and the deflector roll are set to be substantially equal to the peripheral speed of the slitting cutter, the speeds of the front end and the rear end of the loop are maintained substantially equal. A loop can always be formed throughout the period of the game. Therefore, even with such an operation, the tension can be set to a value close to zero by the loop before and after the slitting cutter, and the shearing load on the slitting cutter can be suppressed to be small.

Here, the size of the loop may be set so that the tension of each of the steel sheet strip and the strip when passing through the slitting cutter becomes a value close to zero. This can be covered, and conventional looping pits and the like can be handled with unnecessary equipment. And
By setting the tension to a value close to zero, the load on the slitting cutter and the shearing load on the steel sheet strip itself are reduced, and slitting without unnecessary concentration of stress becomes possible.

[0018]

FIG. 1 is a front view showing an outline of a slitter line according to the present invention, and FIG. 2 is a schematic plan view thereof.

In the figure, the slitter line comprises an uncoiler 1 arranged at an upstream end and a winding device 2 arranged at a downstream end thereof, and is configured as a slitting cutter 3 arranged in the middle of the line. Such a layout is similar to a conventional slitter line. In the present invention, a pair of pinch rolls 4 and a pair of deflector rolls 5 are disposed on the upstream side and the downstream side of the slitting cutter 3, respectively, with the upper and lower sides of the line interposed therebetween.

The uncoiler 1 is configured such that a steel coil 21 wound in a coil shape is rotatably mounted thereon so that a steel strip 22 can be unwound from the peripheral surface thereof. The steel plate strip 22 rotates as it travels.

The winding device 2 includes a main shaft 2a having a rotation axis in a direction perpendicular to the slitter line, and the main shaft 2a can be driven to rotate by a driving device 2c including a controller 2b. The controller 2b of the driving device 2c can be operated in conjunction with the control of the rotation of each of the uncoiler 1, the slitting cutter 3, the pinch roll 4, and the deflector roll 5.

Here, as described in the section of the prior art,
Since the steel plate coil 21 has a thickness deviation in the width direction,
When winding on the main shaft 2a of the winding device 2 after slitting, the layer thickness of the strip 23 wound around the central portion in the axial direction of the main shaft 2a is larger than that of the strip 23 corresponding to the end in the width direction. Also gets thicker ahead of time. Therefore, the peripheral speed of each strip 23 when rotating the main shaft 2a becomes different. For example, an electromagnetic winding in which a slip ring is extrapolated around the main shaft 2a so as to correspond to each strip 23. By setting the torque for slipping these slip rings appropriately, each strip 2
3 can be made uniform. Therefore, also in the slitter line of the present invention, by applying a conventionally known tension setting mechanism of each strip 23 at the time of winding, each strip 23 after slitting by the slitting cutter 3 is applied. Equipment for adjusting the winding tension for each can be obtained.

The pinch rolls 4 and the deflector tones 5 arranged in pairs at the positions sandwiching the upper and lower sides of the steel strip 22 are driven to rotate by respective driving devices 4a and 5a, and their rotation speeds can be controlled. . The slitting cutter 3 is also provided with a controller 6 for controlling the driving and the rotating speed of the slitting cutter 3 by the same driving device 3a, and controlling the driving devices 3a to 5a.

In the embodiment, the drive unit 2c of the winding device 2 is also provided with an independent controller 2b. However, the whole control including the control by the controller 2b is performed by the controller 6 collectively. You can also

In FIG. 1, a steel plate strip 22 between the pinch roll 4 and the slitting cutter 3 and each strip 23 between the slitting cutter 3 and the winding device 2 have loops slightly bent downward. Perform slitting as a path that can be performed. That is, control is performed so as to have a bending loop of such a size that the tension of each of the steel plate strip 22 and each of the strips 23 sandwiching the slitting cutter 3 can be maintained under the condition that the respective tensions become zero. The control of the traveling path of the steel plate strip 22 and each of the strips 23 is performed by forming a loop as shown in FIG. 1 in an initial stage when the steel strip 22 and each of the strips 23 are run. The rotation can be performed by controlling the rotation of the pinch roll 4 and the deflector roll 5 at a peripheral speed substantially equal to the peripheral speed of the slitting cutter 3.

The loop height detecting sensors 7a and 7b, such as photoelectric sensors, for detecting a change in the loop height of the steel strip 22 and the strip 23 are positioned at positions corresponding to the steel strip 22 and the strip 23, respectively. It is arranged so that signals from these sensors 7a and 7b can be input to the controller 6. Then, the controller 6 controls the rotation speed of each of the pinch roll 4 and the deflector roll 5 so that the respective loop heights of the steel plate strip 22 and the strip 23 do not decrease and their respective tensions do not increase from zero. The tension of the steel plate strip 22 and the strip 23 when passing through the slitting cutter 3 can be maintained at zero.

In the above construction, while the steel strip 22 from the uncoiler 1 passes through the pinch roll 4 and the deflector roll 5 and passes to the winding device 2, the steel strip 22 between the pinch roll 4 and the deflector roll 5 The slitting cutter 3 slits a total of four strips 23. The winding of these strips 23 is continued by a slip mechanism or the like attached to the main shaft 2a of the winding device 2 up to a certain set tensile tension for all the strips 23 as an upper limit, and exceeds the upper limit. Occasionally, the winding of the strip 23 is slipped by the slip mechanism, thereby making it possible to prevent the slack of the strip 23 before winding caused by a deviation in thickness.

In this slitting, the peripheral speeds of the pinch roll 4 and the deflector roll 5 located on the entrance side and the exit side of the slitting cutter 3 are, as shown in FIG. Strip 2
The setting is made so that each of the second member 2 and the strip member 23 slightly bends downward to form a shallow loop. In order to form such a loop, it is possible to set each of the pinch rolls 4 and the deflector rolls 5 to have substantially the same peripheral speed as the peripheral speed when the slitting cutter 3 rotates. is there.

In forming such loops, the controller 6 controls the rotational driving speed of each of the driving devices 3a, 4a, 5a as a system in which the size of each loop is detected by the loop height detecting sensors 7a, 7b. it can. For example, when the height of the loop between the slitting cutter 3 and the deflector roll 5 decreases, that is, when the loop approaches a linear path, the control is performed based on the peripheral speed of the slitting cutter 3. In such a case, the loop can be deepened by lowering the peripheral speed of the deflector roll 5, and the strip 23 is maintained in a state where the tension remains zero. When the loop becomes too deep, if the control is performed to increase the peripheral speed of the deflector roll 5, the height of the loop can always be appropriately set.

By performing the same control between the pinch roll 2 and the slitting cutter 3,
Steel strip 22 before entering slitting cutter 2
Can be set to an appropriate size.

As described above, the tension of each of the steel plate strip 22 sandwiching the front and rear of the slitting cutter 3 and the strip 23 after slitting can be set to zero so that the stripping cutter 3 can be passed through the slitting cutter 3. . For this reason, the steel strip 22, which is in a state close to the free end with no tension, can be sheared by the slitting cutter 3 which is rotationally driven by the driving device 3a. Both the load and the load applied to the steel strip 22 itself are reduced.

Accordingly, the concentration of the stress on the slitting cutter 3 is suppressed, the deterioration and damage of the shearing force are prevented, and the stripping 23 having a good shearing surface and a high precision with respect to the steel plate strip 22 is slitted. can do.

[0033]

According to the present invention, a looping pit is not required for the deflection of the strip after the slitting, so that the line length can be shortened, the equipment can be simplified and the cost can be reduced. Since the shearing load on the sheet can be reduced, the life thereof can be improved and slitting with high accuracy can be performed, and it can be suitably used for slitting thin plates.

[Brief description of the drawings]

FIG. 1 is a front view showing an outline of a multi-slit slitting apparatus according to the present invention.

FIG. 2 is a plan view showing an outline of a slitter line.

FIG. 3 is a schematic diagram of a conventional slitter device having a looping pit.

FIG. 4 is a schematic view of a conventional slitting device of a pull cut type.

[Explanation of symbols]

 1: uncoiler 2: winding device 2a: spindle 2b: controller 2c: drive device 3: slitting cutter 3a: drive device 4: pinch roll 4a: drive device 5a: drive device 6: controller 7a, 7b: loop height detection sensor 21: steel plate coil 22: steel plate strip 23: strip material

Claims (1)

[Claims] 1. A slitter line comprising: a slitting cutter for cutting a steel sheet strip or the like into a plurality of strips; and a winding device disposed downstream thereof and winding up while adjusting the tensile tension of each strip. On each of the upstream side and the downstream side of the slitting cutter, a row of rolls for feeding the steel sheet strip and each strip after slitting in the passing direction are provided, and the peripheral speed of these roll rows is set to the peripheral speed of the slitting cutter. A multi-slit slitting apparatus which is capable of being driven to rotate substantially in accordance with the above, and capable of forming loops in the steel plate strip and the strip at the entrance side and the exit side of the slitting cutter, respectively.