JP3446094B2 - Slitter system and slitting method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slitting method for cutting a lead frame or the like made of a copper alloy, an iron-nickel alloy or the like, and a slitting system for carrying out the same.

[0002]

2. Description of the Related Art Conventionally, a lead frame made of copper alloy, iron-nickel alloy, or the like is formed by cutting. A slitting system is used to form this lead frame. Recently, the demand for cutting phosphor bronze, Western foil, stainless steel, beryllium-copper alloy, etc. has been increasing, and the demand for cutting accuracy is particularly urgent.

A conventional slitting system is provided with an uncoiler for supplying a coil-shaped elongated metal plate provided at one end of a transfer path and a decoiler provided at the other end of the transfer path. A first tension roller that applies tension to the supplied long metal plate in order toward the edge, a slitter that cuts the long metal plate, and a plurality of cut metal strips that have been cut There is provided a roller leveler for performing the operation and a second tension roller for applying a tension to the metal strip. The metal strip that has been cut through the second tension roller is wound around the decoiler. In the above system, the tension leveler performs high precision warp correction and strain removal after precision rolling of a thin metal plate in order to respond to relatively thin slitter cutting of metal.

[0004]

However, in the above-described slitting system, the tension leveler and the strain removal speed are remarkably slow, and even if the slitter can process at a high speed (for example, 100 m / min), the warp correction is highly accurate. For this, an annealing furnace or the like is required. This annealing furnace requires a long processing time due to its capability, and generally, for example, 2
It is forced to slow down considerably at ~ 5m / min. Therefore, the production capacity must be reduced or the straightening lines must be arranged in parallel as much as necessary, and an increase in the capital investment burden cannot be avoided.

In addition, in the conventional slitting system, various tension levelers and annealing devices have been manufactured, but none of them can solve the above problems.
This is especially important when many metal strips need to be cut at one time.

On the other hand, in terms of the size of the warp, not only the final product but also the warp of the metal strip itself is normally hung vertically with a length of 1 to 2 meters and the displacement of the lower end is observed. It is measured and judged, and if it does not reach the desired level, it will be extremely difficult to make a product. Here, the term "warp" generally deviates from the definition of "warp". However, in the quality of the strip, naturally, there are bends, burrs, thickness deviations, partial waves, etc. The so-called warp of the part, such as warp or twist, is called.

Here, a typical plate thickness tolerance of a lead frame is, for example, 0.150 ± 0.010 mm.
Then, it passes through the tension leveler and also undergoes strain relief reannealing. Even so, if it is cut into a width of about 25 to 30 mm, a displacement of about 30 mm occurs when vertically hung with a length of 1 m. Moreover, it is important to note that the length of each cut strip varies and the warp varies from 10 mm to 40 mm, and even if the standards meet each other, it is possible to absorb or correct the elongation due to uneven thickness. Can not. Therefore, if, for example, patterning of a package (PKG) is performed in this state, the warp of each individual lead frame is at a level at which the product does not become a product at all. Approximately 5 in terms of the above displacement
Must be stable within mm.

In general, a warp straightening tension leveler is a bridle (BRIDL) for a non-cut thin plate.
E) A roller is provided and the yield stress is at least 50-6.
Either the roller is passed with a tension of 0% or more applied, or two levelers for shape correction and residual stress removal are used together.

Further, in the above slitting system, a magnetic body is provided in a recoiler having a winding ring,
Although it has already been proposed that a plurality of cut strips be wound around the outer periphery of each winding ring, a short product cannot exert a sufficient effect, so-called
It was not sufficiently satisfactory to cut a metal strip in accordance with the market demand (see Japanese Utility Model Laid-Open No. 63-175648). In short, the driver that applies the magnetic force of the individual take-up rings can control the tension between the individual take-up rings in the ring circular cross-section direction, but can adjust the mutual rings (so-called lateral). Because there is no.

Therefore, there is a demand for the development of a device capable of straightening the warp while practically reducing the cutting speed while slitting.

[0011] Therefore, one technical object of the present invention is to provide a slitting method and a slitter system which can correct the warp without substantially reducing the cutting speed while slitting.

Another technical object of the present invention is to provide a slitting method and a slitter system capable of individually correcting warp and adjusting tension of cut metal strips.

[0013]

According to the present invention, a desired warp level can be obtained by operating a non-fixed independent top provided on a recoiler and a roller jig between the slitter and the recoiler, and at the same time, they can be operated at the same time. It is intended to provide a slitter system that can obtain a better effect and a slitting method thereof.

That is, according to the present invention, there is provided an uncoiler provided at one end of the transfer path, a slitter provided in the middle of the transfer path, and a decoiler provided at the other end of the transfer path. A slitter system in which a long metal plate is supplied by an uncoiler, the long metal plate is cut by the slitter, a plurality of metal strips are formed, and the plurality of metal strips are wound by the recoiler, The recoiler is provided with a non-fixed independent piece that can individually control the tension of the strip to be cut and is mechanically movable, and the non -fixed independent piece is a controllable electromagnetic absorber.
Of the take-up ring arranged around the take-up shaft that generates attractive force
Generates the controllable electromagnetic attraction force, which is arranged on each side
It is sucked by the take-up shaft and rotates following the rotation of the take-up shaft.
It is composed of a plurality of rotating driving bodies, and
By independently controlling the attractive force,
A slitter system is obtained which is characterized in that the tension can be adjusted individually .

Further, according to the present invention, double in the slitter system, between the slitter and the recoiler along the conveying path, the strip individually warp correction can
A slitter system characterized by having a roller jig with a number of straightening rollers .

[0016]

According to the present invention, in the slitter system, the elongated metal plate is a lead frame.
Roller made of ultra-thin metal plate material for producing
Center the surface of the upstream roller in the jig with respect to the drive shaft.
The shape of the roller is slightly raised, and the roller
Between the jig and the recoiler, a strain relief anneal part
A slitter system characterized by being provided can be obtained.

Further , according to the present invention, a relatively thin elongated shape
While transporting the metal plates of the
And cut the metal strips by a coil
In the slitting method of the slitter system
At the non-fixed independent top provided on the recoiler,
Therefore, control the tension of the strip to be cut individually.
The non-fixed independent top has a controllable electromagnetic attraction force.
Of the take-up ring arranged around the take-up shaft
Respectively, and generate the controllable electromagnetic attraction force.
It is sucked by the winding shaft and rotates following the rotation of the winding shaft.
It is composed of multiple driving bodies, and the suction force to the multiple driving bodies
By independently controlling the
The configuration can be adjusted individually.
A characteristic slitting method is obtained. Further, according to the present invention, in the slitting method, a roller jig is provided between the slitter and the decoiler in the conveying path, and the cut strips are individually warped and corrected. A method is obtained.

The slitter system of the present invention will be described in more detail below. The slitter system of the present invention is attached to the take-up ring of the recoiler. The drive body itself exerting magnetism for adjusting the take-up radius is tightened to the take-up ring. By forming a long hole in the nut part of the bolt and inserting a spacer consisting of a ring roller in which a fine bearing is embedded between adjacent winding rings for winding each metal strip, each winding ring is effectively Each metal strip can be controlled individually and mutually by a non-fixed independent frame consisting of a recoiler driving body that can move independently independently and an electromagnetic coil that gives a magnetic force to this driving body.

More specifically, the roller jig of the slitter system according to the present invention is basically different from the roller leveler in that the rollers arranged in the puddle are assembled in groups of, for example, 3 to 5 each. ， For each cut strip, after the plate material is set on the recoiler, it is attached, and every 3 to 5 rollers, the roller gap has a long hole that can be freely controlled and bites. The push-in displacement can be controlled so that the displacement is larger than the amount of warpage when the ball screw for insertion is arranged and the recoiler is not set. Moreover, the individual roller jigs are independent of each other.

Further, in the present invention, the slitter is also an important factor, and 0% to 2% of the general gap / plate thickness of the upper and lower blades is used.
It is considerably narrower than 0%, and by setting it to approximately 0 to 6%, it is possible to eliminate warp and ear warp due to cutting itself. Where the gap 7
% Or more, it is inconvenient because the object of the present invention cannot secure quality other than warpage. Furthermore, the so-called strict adjustment of the so-called stripping conditions is practically impossible, and a slight deviation in the slit positions of the upper and lower blades usually causes a twist in the slit direction. This is because the strain distribution of is not uniform (generally parabolic).

In general, the straightening of the coiled metal sheet material after cutting the strip is not suitable for straightening the narrow width because the existing equipment for tension leveler and tension annealing is for wide coil material. In reality, the warpage is not so good as expected, and it is limited to conventional roller levelers.

As described above, in the slitter system of the present invention, the non-fixed independent top and the roller jig are adjusted to the upper and lower blades and the positional relationship is performed as described above, thereby making it possible to remove a relatively thin metal piece. At least a length slightly longer than the length wrapped around the uncoiler and the recoiler (substantially the cut length and straightness is called the substantial length) is sufficient, for example, 2 m or less, the actual length. The slitter device can be cut even at 4 to 5 m or less, and as a relatively thin metal cut, it can be a slitter device capable of sufficiently securing desired performance.

Further, in the present invention, when annealing is performed, the strain relief annealing portion may be arranged immediately after the expected rollering. The effect of quenching at a relatively low temperature (low temperature quenching) can be expected at the same time, and can be appropriately selected depending on the material.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram schematically showing the overall construction of a slitter device according to an embodiment of the present invention. Referring to FIG. 1, the slitter device includes an uncoiler 11, a tension roller 12, a guide roller 13, a slitter 14, a warp roller jig 20 and / or a warp roller jig 3 in order along a conveying path of a metal plate material to be cut.
Straightening roller jig consisting of 0, roller 16 with load cell, tension roller 17, guide roller 18,
And a recoiler 1.

The slitter 14 is considerably narrower than 0% to 20% of the general gap and plate thickness of the upper and lower blades, and is set to approximately 0 to 6% to eliminate the warp and the ear warp due to the cutting itself. Here, if the gap is 7% or more, quality other than warpage cannot be ensured, which is inconvenient.

FIG. 2 (a) is a front view mainly showing the take-up ring portion of the recoiler 1 of FIG. 1, and FIG. 2 (b) is a partial side sectional view of the recoiler 1 of FIG.

As shown in FIG. 2 (a), the recoiler 1
In the axial direction of the winding shaft 5 in which the electromagnetic device is arranged, according to the number of cut metal strips, the winding ring 2a,
It is configured by arranging 2b in parallel. Winding ring 2a
On the outer side of the take-up shaft 5, drive bodies 1a made of a magnetic material and having a substantially trapezoidal shape and having an arc formed on the outer side are provided at eight equally divided positions. Each driver 1a is
It is configured to be attracted by the radially arranged poles of the electromagnetic coil device, which will be described later in detail, inside the winding shaft 5. Further, each driving body 1a is provided with an elongated hole 1b that is long in the radial direction, and bolts and nuts 1 (not shown) are provided.
It is fixed to the ring plate body so as to be movable in the radial direction by c.

As shown in FIG. 2 (b), each of the winding rings 2a and 2b comprises a pair of opposed ring plates and a ring-shaped collar 4 inserted and arranged on the driving body 1a between them. I have it. A ring roller 3 is provided between the adjacent take-up rings 2a and 2b so that each take-up ring can be independently driven.

FIG. 3 is a diagram showing the arrangement of the electromagnetic coil devices of the winding shaft 5, and FIG. 4 is a diagram specifically showing the structure of the winding shaft 5. As shown in FIG. 3, the vertical direction indicates the circumferential direction of the winding shaft 5, and the horizontal direction indicates the length direction of the winding shaft 5. That is, in FIG. 3, when a current is applied to each coil, the magnetic poles of the winding shaft 5 corresponding to each coil plate are shown in the lateral direction (row direction). It corresponds to the magnetic pole. Also, in the vertical direction (row direction),
They correspond to the magnetic poles of the driving body 1a arranged in the circumferential direction of each coil plate body. The electromagnetic coil of the winding shaft 5 is connected to a power supply and a tension controller via a voltage regulator (voltage reactor, hereinafter referred to as VR).
By controlling the current by each of the VRs, the magnetic force at any place can be adjusted, and therefore, the tension of the take-up ring can be adjusted at the time of taking-up by the recoiler 1.

Referring to FIG. 4, in the electromagnetic coil device, a substantially octagonal iron core 6 and coil cores 7a and 7b of the electromagnetic coil are formed radially outward from the corner sides of the iron core. The pole core 7a has a width that gradually increases toward the outer side in the radial direction, while the pole core 7b that forms the N pole has a width smaller than that of the S pole coil core 7a. The outer sides are formed to have substantially the same width. The coils 7c and 7d are wound around the coil cores 7a and 7b, respectively, and the coil cores 7a and 7d are wound around the coils 7c and 7d.
7b can be moved mechanically. Coil cores 7a and 7
On the outer side of b, iron-based shaft members 8a and 8b whose outer peripheral surface forms one arc are provided with a gap in the circumferential direction between adjacent shaft members. These gaps are filled with a connecting member 9 made of a dissimilar metal such as brass, and each shaft member 8a is inserted by inserting a pin 10 into a through hole extending from one end of the shaft member 8a through the connecting member 9 to one end of the shaft member 8b. , 8b are connected in the circumferential direction.

As described above, the nut 1 of the tightening bolt is attached to the driving body 1a for exerting magnetism which is attached to the rings 2a, 2a of the recoiler 1 according to the embodiment of the present invention.
By providing a long hole 1b in c and inserting a spacer consisting of a ring roller 3 having a fine bearing embedded between it and an adjacent winding ring, a winding ring that can move substantially independently, that is, a winding ring By a non-fixed independent top composed of an eight-pole electromagnetic coil arranged inside the take-up shaft 5 and a drive body 1a provided on a ring plate body corresponding to the electromagnetic coil and movable and adjustable in the radial direction, Take-up rings 2a, 2
The winding radius of b can be adjusted individually by mechanical movement and the tension of the cut strip can be controlled.

As described above, since the recoiler 1 is provided with the electromagnetic coil in the winding shaft 5 and this electromagnetic coil is divided into eight in the circular cross section, the magnetic force in the circumferential direction is Variations can be reduced.

Further, the electromagnetic coils axially adjacent to each other in the winding shaft 5 of the recoiler 1 are also the same as those described above.
The coil is subdivided and wound so as to have the coil cores 7a and 7b.

As described above, the drive body 1a provided on the ring plate body as the non-fixed independent frame and the electromagnetic coil provided in the winding shaft 5 are connected in the axial direction of the winding shaft 5. Thus, the winding rings 2a and 2b held by the magnetic force on the winding shaft 5 can individually control the magnetic force, and as a result, the roller 16 with a load cell for detecting the tension (see FIGS. 1 and 3). By controlling the holding force of the take-up ring, each strip can be wound with the same tension.

The magnetic force of the electromagnetic coil can be freely controlled up to about 700 G (Gauss) for each coil material after strip cutting.

FIG. 5 is a side view of the straightening roller jig shown in FIG. 1, and FIG. 6 is a front view of the straightening roller jig shown in FIG. Referring to FIGS. 5 and 6, the warp straightening roller unit includes a warp roller jig 20 and a warp roller jig 30.
And are serially installed along the strip conveyor path.

The warp roller jig 20 is provided with four straightening rollers 21, 22, 23, 22 'in a zig hug above and below the conveyance path in the direction along the conveyance path of the strip, and surrounds the side plate 27a, It is surrounded by 27b.

The straightening rollers 21, 23 are provided with shafts 21a, 2
3a, so that the roller gap can be freely controlled so that the roller gap can be freely controlled.
Are equipped with In addition, the straightening rollers 22 and 22 'include support members 25 and 25' that support the shafts 22a and 22a 'from both sides, and the support members 25 to the rollers 22 and 22'.
It is provided with motor-equipped ball screws 26, 26 ′ that move together with the ′ in a direction toward or away from the strip, and the ball screws 26, 26 ′ are supported by a bottom plate 29.

The warp roller jig 30 is provided with four straightening rollers 31, 32, 33, 32 'in a zig hug above and below the conveyance path in the direction along the conveyance path of the strip. It is surrounded by 37b.

The straightening rollers 31, 33 have shafts 31a, 3
3a and the long holes 34a, 34 so as to be movable in the transport direction.
b are provided respectively. Also, the straightening rollers 32, 32 '
Are supporting members 35, 35 'for supporting the shafts 32a, 32a' from both sides, respectively, and the supporting member 35 for the correction roller 3
2 and 32 'are provided with motor-equipped ball screws 36 and 36' that move in a direction toward or away from the strip. The ball screws 36 and 36 'are supported by an upper plate 37c that covers side plates 37a and 37b.

The straightening roller portion has a biting depth of 2 to 3
Unlike general roller levelers of about mm, ball screws 26, 26 'and ball screws 36, 36' and slot 24
As shown in FIG. 5, the a, 24a 'and the long holes 34a, 34b are arranged so that the biting depth can be arbitrarily set, and the pushing displacement is controlled so that the displacement is larger than the warp amount when the strip is not set on the recoiler. The pair of straightening rollers 21, 22, 23, 22 ', which are four short rollers, can be arbitrarily changed according to a desired material. Ball screws 26, 2
Because it is due to 6 ', the degree of warpage of each article,
The variation due to uneven thickness (the partial thickness unevenness does not become zero even with tension rolling) is adjusted by these combinations. In addition, with respect to the occurrence of twist, the roller surface of the straightening roller 21, which is the first roller, is slightly raised toward the center with respect to the drive shaft, that is, stepped or drum-shaped. The distortion in the width direction could be corrected. This is because the size of the roller itself is small and the width of the coil material after the strip is cut is small, so that the entire roller jig is compact and only the first roller needs to be machined. Of course, the second roller is also processed if necessary. For the most part, depending on the desired level, it is sufficient to process only the parallel rollers or the first roller.

As described above, in the slitter system of the present invention, the recoiler portion and the roller jig are adjusted to the upper and lower blades and the positional relationship is performed as described above, so that even if a relatively thin metal is used, A length slightly shorter than the length wound around the uncoiler and the recoiler, and this length may be called a substantial length because it is a net length that is substantially cut and straightened, for example, 2 m or less, Even if the length is 4 to 5 m or less, the desired performance can be sufficiently secured as a relatively thin metal cut.

Further, if an annealing furnace as an annealing part is arranged immediately after the lazing, the effect of annealing can be expected. The effect of low temperature quenching can be expected at the same time,
It can be appropriately selected depending on the material.

Further, as described above, the recoiler 1 according to the embodiment of the present invention has the mechanically movable driving body 1a.
It has a recoiler part with the control of the tension of the strip to be cut individually, and the roller jig has upward warp and downward warp for each warp depending on the desired number of strips. By arranging the downward warpage downwards, we are considering the installation in a narrow space.

Referring again to FIG. 1, when viewed from a plane,
The roller jig should be located as close as possible to the upper and lower slitters according to the desired number of strips. If it is a new installation, the effect can be made more certain by moving it to the upper and lower blades as close as possible. Further, the ball screws 26, 26 'or 36, 36' allow the strips to be adjusted more freely.

As shown in Table 1 below, even the materials used for the lead frame have different mechanical strengths, and it is not uncommon to apply solder or nickel plating to these surfaces. In that case, the warp will be accelerated. If this is the case, the straightening while applying tension in the conventional annealing furnace not only does not result in the desired warp level, but also the processing speed is remarkably slow as described above, which is not practical, but according to the present embodiment. If the roller jigs 20 and 30 are used, a straightening process can be performed quickly.

[0049]

[Table 1]

Hereinafter, examples of use of the slitter system according to the embodiment of the present invention will be shown.

(Specific Example 1) A high strength 42 alloy plate material, a spool having a thickness of 100 μm and a width of 550 mm is set on the uncoiler 11, passed through the tension roller 12, and then the slitter 14 is turned on. Width 5
Take 10 strips of 0 mm metal. When it was driven at 100 m / min, a large number of small warps and a small amount of warp occurred alternately after cutting several meters. In order to return these metal strips in the direction opposite to the warp, approximately the same amount as the warp amount, or slightly larger, adjust the larger warp with a depression angle of 23 degrees and the smaller one with 16 degrees. While stripping each strip cut into 10
I installed the article. Next, while observing the load cell that had been set in advance, it was driven again while applying tension at approximately 500 gauss (G). It is cut at 97 m / min. When about 3-4 m is cut, the roller jig 2 is cut again.
I opened 0 and measured the warp of each strip removed from the recoiler 1. When dropped vertically by 1 m, the warpage was 2 mm.
For comparison, the warp was 35 mm when similarly cut without the roller jig 20. Therefore, when the slitter system according to the embodiment of the present invention is used,
It was found that the warp was remarkably improved. From this strip, the desired product could be obtained with almost no warpage. At this time,
High-strength 42 alloy plate, which is an expensive material, is approximately 3.5 m
Once it was taken out, it could be made into a product.

(Specific Example 2) Copper alloy (MF202) thickness 2
0 μm, width 800 mm spool from width 32 mm, 22
When taking a strip, the magnetic force is 280 gauss, the larger pushing angle is 15 degrees, and the smaller one is 12 degrees, and the first roller of the roller jig 20 has a stepped portion having a diameter of approximately the same as that of the straightening roller for warpage correction in FIG. 1.5 mm was provided for 32 mm.
When cut at a normal cutting speed of 250 m / min, it was 3 mm when hung vertically for 1 m, and the respective strips were good with no twist or bend. In addition, as a 180 mm intermediate material, discharge overlap cutting was performed, and a warp of only 0.1 mm with respect to 180 mm was sufficient, which was sufficiently satisfactory. Here, the same result was obtained even when the both sides of the first straightening roller 21 were rounded in a so-called drum shape instead of the step portion of 1.5 mm.

In addition to the above example, when cutting a thin metal plate material, many of them have already been subjected to tension annealing,
When cutting to a thickness of 0.06 mm and a width of 12.5 mm,
When the surface of the first roller was made to have a ridge of 25 μm, a good connector material without warpage was obtained.
In the case of a beryllium-copper alloy plate material having a thickness of 0.5 mm used as the spring material, the roller jig 20,
Immediately after 30, when passing through an annealing furnace at about 400 ° C., a desired warp level was obtained.

Also in the above-mentioned first and second specific examples, it is more effective to use the annealing furnace if the cost and the quality are well balanced.

[0055]

As described above, according to the present invention, a slitter device capable of obtaining a desired warp level by simultaneously operating a non-fixed independent top of a recoiler and a straightening roller jig between the slitter and the recoiler is provided. ， It can provide the slitting method.

Further, according to the present invention, it is possible to provide a slitting method capable of simultaneously correcting warpage while slitting, without substantially reducing the cutting speed, and a slitting system using the same. .

[Brief description of drawings]

FIG. 1 is a diagram schematically showing an overall configuration of a slitter system according to an embodiment of the present invention.

2A is a front view mainly showing a winding ring portion of the recoiler 1 of FIG. 1. FIG. (B) is a partial side sectional view of the recoiler 1 of FIG. 1.

FIG. 3 is a diagram showing an arrangement of electromagnetic coil devices of the winding shaft 5 of FIG.

FIG. 4 is a diagram specifically showing the structure of the winding shaft 5 of FIG.

5 is a side view of the straightening roller jig of FIG. 1. FIG.

FIG. 6 is a front view of the straightening roller jig of FIG.

[Explanation of symbols]

1 Recoiler 1a Driver 1b Slot 1c Nut 2a, 2b Winding ring 4 Collar 6 Iron core 7a, 7b Coil core 7c, 7d Coil 8a, 8b Shaft member 9 Connecting member 10 Pin 11 Uncoiler 12 Tension roller 13 Guide roller 14 Slitter 16 Roller with load cell 17 Tension roller 18 Guide roller 20 Warp roller jigs 21, 22, 22 ', 23, 31, 32, 32', 3
3, straightening rollers 21a, 22a, 22a'23a, 31a, 32a, 3
2a'33a shafts 24a, 24b, 34a, 34b long holes 25, 25 ', 35, 35' support members 26, 26 ', 36, 36' motorized ball screws 27a, 27b, 37a, 37b side plate 29 bottom plate 30 down warp roller Jig 37c upper plate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI H01L 23/50 H01L 23/50 B (72) Inventor Akira Ichida 2 Iwase Koshimachi, Toyama City, Toyama Prefecture Tokyo Tangsten Toyama Co., Ltd. (56) References JP-A-4-288927 (JP, A) JP-A-5-320 (JP, A) JP-A-62-275507 (JP, A) (58) Fields investigated (Int.Cl) . ⁷ , DB name) B23D 19/06 B21D 1/05 B21C 47/00 B21C 47/26 H01L 23/50

Claims (5)

(57) [Claims] 1. An uncoiler provided at one end of a transport path, a slitter provided in the middle of the transport path, and a recoiler provided at the other end of the transport path, wherein a long metal is provided by the uncoiler. In the slitter system in which a plate is supplied, the elongated metal plate is cut by the slitter to form a plurality of metal strips, and the metal strips are wound by the recoiler, the decoiler is to be cut. A non-fixed independent piece that can individually control the tension of the strip and is mechanically movable is provided, and the non-fixed independent piece is arranged around a winding shaft that generates a controllable electromagnetic attraction force. A plurality of driving bodies that are respectively arranged on one surface of the winding ring and are attracted by the winding shaft that generates the controllable electromagnetic attraction force and rotate following the rotation of the winding shaft; The suction force of the driver by controlling individually independently slitter system characterized by being configured to adjust the tension of the to be cut strip individually. 2. The slitter system according to claim 1, further comprising a roller jig provided between the slitter and the decoiler along the conveying path, the roller jig having a plurality of straightening rollers capable of straightening warp individually. A slitter system characterized by that. 3. The slitter system according to claim 1, wherein the elongated metal plate is made of an ultra-thin metal plate material for producing a lead frame, and drives the surface of an upstream roller in the roller jig. A slitter system having a shape in which a portion near the center is slightly raised with respect to an axis, and a strain relief anneal portion is provided between the roller jig and the recoiler. 4. A relatively thin elongated metal plate is continuously conveyed along a conveying path and cut by a slitter,
In a slitting method of a slitter system for winding a cut metal strip by a recoiler, the tension of the strip to be cut is individually controlled by a non-fixed independent top provided on the ricoiler, and the non-fixed independent Each of the tops is arranged on one surface of a winding ring arranged around a winding shaft that generates a controllable electromagnetic attraction force, and is attracted to the winding shaft that generates the controllable electromagnetic attraction force. It is composed of a plurality of driving bodies that rotate following the rotation of the take-up shaft, and by individually controlling the suction force to the plurality of driving bodies, it is possible to individually adjust the tension to the strip to be cut. A slitting method characterized by being configured. 5. The slitting method according to claim 4 , wherein a roller jig is provided between the slitter and the decoiler in the conveying path to individually correct the warp of the cut strips. Slitting method.