JPS5841969B2 - rotary cutting cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary cutting cutter for sheet metal material, and more particularly to a rotary cutting cutter for cutting sheet metal material into strips joined in a plurality of sections.

In the production of rolled metal sheets, it is more convenient and economical to first manufacture a sheet metal sheet that is considerably wider than the width normally required by the end user, and then cut this sheet metal into strips of appropriate width. It is true.

During the manufacturing process, the metal sheet is first wound into a coil, then loaded onto an unwinding device, unwound, conveyed through a cutter, cut into a plurality of thin strips, and then wound up.

The cutting operation can be performed either at the sheet metal manufacturing site, by an intermediary such as a wholesaler, or by the end user of the sheet metal.

No matter where the cutting action is performed, conventional coil cutting methods suffer from numerous problems due to the unique properties of the coil itself.

For example, although sheet metal plates are generally thought to have a rectangular cross section, they actually have a shape that is thicker in the middle than at both ends.

For this reason, when a sheet metal plate is shredded and then wound up by a winder, the strip shredded from the middle is thicker and winds up harder than the strip shredded from both ends. It will be done.

This results in the formation of so-called "strip slack" due to the thin strip between the cutting machine and the winding machine.

In order to solve the problem of sagging of this I-IJ knob,
A number of solutions have been developed and are in use in today's coil cutting field.

One such method is to insert cardboard or paper or the like between one turn of the coil at each end of the coil to compensate for the difference in the thickness of the strip being wound.

This method is often performed manually, cumbersome and dangerous.

Even when applied mechanically, operation is cumbersome and requires specially designed machinery.

In either case, it is necessary to remove these cardboards etc. when the strip is unwound.

Another solution to sagging strips is to loop the strip between the cutting machine and the winding machine (Ioo-ping).
It is either festooning or festooning.

Looping requires deep pits, which is inconvenient and expensive.

Festuning is also very expensive because it requires a series of rolls arranged in a tower above the strip processing line.

Furthermore, it is always difficult to control strip sag with these loopings or fencing.

Although it is possible to provide a number of winding devices equal to the number of strips obtained by the cutting operation to prevent sagging of the st-IJ tube, this would be too expensive to be used in practice.

Another approach that does not require a separate winding device is the slip core winding method, which is based on individual processing of the cut stubs I-IJ.

In this method, the strip is wound onto a non-metallic core by frictional forces at a speed proportional to its thickness.

However, the non-metallic core used in this method is itself expensive and must be held in a coil and transported with it.

In addition, the core may deform under load and thus cause irregular winding.

Problems that occur regardless of the bulge in the center of the sheet metal plate, and therefore also occur in sheet metal plates with a rectangular cross section, are problems specific to the conventional thin cutting method.
This means that the edges of the IJ tube tend to overlap when being wound up by a winding device.

Overlapping or binding at the edges of the strips can damage the edges of the coils and result in lost manufacturing time due to the need to unravel the folded coils.

Furthermore, the damaged edges of the strip make it difficult to feed the sl-IJ into a machine, such as a punching press.

Attempts are commonly made to separate each IJ tube to prevent overlap during coil winding.

This is accomplished by inserting spacers between each coil or by using a series of discs mounted on a separate axis from the winder and introduced between each coil as it is wound into a coil.

Regardless of how separation is accomplished, the strips must be moved laterally to separate each strip.

This means that the strip emerging from the cutter is gradually unrolled and requires a long distance from the separating device to the winding device.

Normally, if the spacing between the IJ knobs is 2 to 3 inches, the distance between the cutting device and the winding device should be 15 inches.
You need to take at least 20 feet.

As evident from the foregoing, conventional coil cutting operations have many inherent disadvantages and are problematic.

In the past, these problems were either left alone or only partially solved.

Moreover, these partial solutions have always raised new problems.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a rotary cutting cutter suitable for use in a novel shredding device for metal sheet materials, which overcomes the drawbacks of the conventional shredding devices for metal sheet materials mentioned above.

According to the present invention, it is possible to cut a coiled metal plate into long strips by winding up the entire IJ tube cut into strips from a single sheet as if it were one unit. It is possible to prevent the looseness of the bundle and the binding of the coil, which have been problems in the past when cutting the coil into long strips.

When the unslit sheet is unstriped from the unwinder and pulled through the slitting machine, the sheet is only partially slit, or provided with the equivalent of partial slitting. Completely cut into strips and immediately lightly reattached.

The interconnected strip thus obtained is then delivered as a single sheet to a winder.

A machined section that is cut into strips at any time after rewinding has begun, i.e., when the interconnected strips begin to overlap on the take-up reel and when the coil is unwound for use. The cut or equivalent completes the elongated cut to provide the desired discrete narrow coil.

The interconnected strips behave as a single sheet until the cut is completed by a partial cut or equivalent produced by a slitting machine, which prevents loosening of the bundle, binding of the strips, and the like. You can handle all the attendant problems and difficulties without worrying.

According to one embodiment of the invention, complete separation of the coil is not performed until the coil is finally unwound, for example to be fed into a press, by the end user.

This example provides the advantages described above with the added benefit of eliminating the need for bundling and handling of each separate coil after the slitting operation.

Rather than being individually unwound, the coils may preferably each be broken off as a unit by the end user.

In such cases, each handling method is (1) more efficient than traditional methods and (2) more convenient than conventional handling methods such as cranes or lift trucks used to transport and install each chopped coil. There is little need to change conventional methods to use the machine.

According to another example of the invention, the completion of the partial cut is performed during the initial winding of the coil on the mandrel of the winder.

According to this example of the invention, the final separation is preferably 2
The winding is carried out as close as possible to the second winding,
The first winding of interconnected sheets acts as a wrapper for separate coils.

Whether the final separation takes place on the winder or at some later stage, the arrangement for the final separation is relatively simple.

Conventional slitting machines use several sets of opposing rotating cutters for each cut, which momentarily displace adjacent ends of the slit coil relative to each other in a direction perpendicular to the sheet plane. ing.

In the practice of the present invention, a similar instantaneous displacement occurs where the elongated cut is completed, and a similar degree of relative displacement of adjacent ends occurs where the elongated cut is not completed.

This displacement maintains its displacement until adjacent strips are separated unless the strips are thrust back to a common plane, which is desirable in the present invention, while the bond between the strips is maintained.

A sizing tool can then be used to separate the strips.

In some embodiments of the invention, particularly in embodiments in which the sheet is completely slit and then immediately lightly recombined, the adjacent ends of the strip may recover at all positions from the instantaneous displacement.

If the bond after partial cutting or equivalent cutting is sufficiently weak, a pair of bending or restoring rods can be used to press against the surfaces of the interconnected strips, bringing the strip ends together By pressing the surfaces or temporarily opposite the common surface, any remaining bonds between adjacent strips can be broken.

In this case, one or more endless belts may be sandwiched between the bar and the strip surface to prevent scratching and other damage to the strip, if desired.

Alternatively, a sizing tool can be used to separate the strips during winding after slitting or during final winding.

Alternatively, child coils formed by partial cutting or the like can be broken off from the parent coil simultaneously or one by one.

Of course, other separation tools, including sharp rotary cutters to cut the bonds between adjacent strips, may be used when the strips are wound up after partial shredding or at any time prior to final use and after the start of winding. It can be used similarly.

It is also understood that under certain circumstances additional equipment may be required to complete the cut.

Under circumstances where the partial cutting process forms a series of connected strips with still connected parts displaced from each other in a direction approximately perpendicular to the strip plane, tightly wound on the reel of the winder. Sometimes, the remaining bond between the sheets may be broken by controlling the winding tension.

or when a partial cut etc. is intended to maintain the connection until the connected strip is bent about the winding axis, the bending incidence on the winder during winding of the connected strip may Failure may occur at the joint.

Alternatively, when only one of the connecting strips is unwound while the others remain wound, the connection may be sufficiently deformed simply by differentially trying to straighten about the winding axis.

Alternatively, such differential straightness may be sufficiently deformed by the "stiff surface effect" that the connections may or may not resist to some extent the loading of forces that spread the strips apart.

Alternatively, by pulling the unwinding section during unwinding in a direction with a vector component parallel to the axis of the coil or simply tilting the roll axis from horizontal to perpendicular so that gravity acts on the aforementioned tension. The expansion action may be combined with a combination of bending action and straightening action.

Alternatively, the child coils may be broken off from the parent coil simultaneously or one by one simply by impact or pressure without the use of special tools.

These may be, for example, by dropping or pressing the coils onto a smooth or stepped surface, or by striking them head-on or diagonally with an industrial truck fork or crane hook, or they may be relatively few in number and/or very weak. In the case of a heavy coil with a joint, it may be simply the amount of shearing current when the support such as the mandrel is removed from the child coil.

The cut features formed during the partial elongation cutting operation are subject to a wide variety of variations within the scope of the present invention.

For example, the cutter may include a small contoured flat surface that is ground into the cutter face adjacent the blade, thereby providing a basting or connection across the elongated cutting plate formed by the cutter.

Special sub-plane shapes can also be used to perform basting, as described below.

In one embodiment, the cutter may be moved very slightly eccentrically and positioned to be adjusted vertically.

This allows for complete and incomplete shredding.

Incomplete shreds between complete shreds may also be separated using any of the different separation methods described above.

In other embodiments, the upper cutter shaft can be mounted for slight vertical movement, typically on the order of a few tenths of an inch, and the shaft is lifted by a cam or other thing that lifts the shaft periodically. The cutter installed above each time is controlled so as to bast across the thin cut portion.

In another embodiment, the upper and lower cutters can be provided with flat surfaces, the flat surfaces acting as a resistance to rotation relative to each other;
Complete shredding and basting are performed alternately.

In yet another embodiment, the cutter can be adjusted vertically so that during continuous or complete shredding a sensor indicates initial or actual non-uniformity of the winding. The sheet is sheared so that there is a slight lack of tip breakage when the tip is broken.

``This option can be applied, for example, when the separation is completed during the initial winding of the coil on the winder mandrel.

Separation of the strips on the winder can be done in any of the ways described above.

As previously mentioned, the cutter may be arranged to provide continuous complete chopping instead of partial chopping.

However, in this case, partial recombination takes place immediately on a rolling table installed immediately after the shredding cutter.

In this way, the bond between adjacent ends of the precut strip is maintained during the winding operation, as is the case with partial chopping.

In the present invention, a new method of slitting lines is possible in which the slitting machine and the winding machine are combined in relatively close proximity.

For such a line, a momentary basting or basting, in which the ends of the child coils are made parallel by the action of the shredding rolls, can be "captured" so to speak.

Such a close combination is therefore a rather preferred positive feature in the practice of the present invention.

As mentioned above, the main benefit of the partial chopping or equivalent of the present invention is that it solves the problem of entrapment.

Also as previously mentioned, a conventional solution to this problem has been to use separator plates between the chopped strips.

However, this required a considerable distance between the slitting machine and the winding machine in order to cause the strip to be laterally displaced and separated.

When carrying out the shredding operation according to the invention, lateral displacements are no longer necessary, so that the shredding machine no longer needs to be located at a considerable distance from the winder, which results in a more compact processing line and less floor space. You will be able to save money.

The close combination between the shredding machine and the winding machine is
Not only is it no longer necessary to have a large space, but a large space also allows a considerable improvement in processing operations.

It becomes possible to directly shred from a rolling mill, which requires at least five cold rolling mills or temper rolling mills in series.

It is a major benefit of the present invention that when the final separation of the child coils is performed by the end user, it is not necessary to bundle and handle each separated coil individually.

The original parent coil is formed into a coil structure in which several child coils are aligned, and these cannot be handled together until the child coils are easily separated by the end user or wholesaler or intermediary. can.

One particular benefit is improved scrap handling and improved protection of the coil during transhipment.

In the conventional method, the ends of the coil had to be rolled, cut, or wound, but in the method of the present invention, each end where the child coils are aligned is a flat disk-shaped coil. It can be rolled up to look like this.

These 1,000-disk shaped coils help protect the first child coil during transshipment, and can be easily broken off at the location where the coil is to be used.

In some applications, it can even be treated as a unit until redissolved or regenerated.

The final separation of a coil constructed in this way is 1
This is done by separately unwinding the child coils one by one, which are supported together on one mandrel or unwinding table, and can be delivered and supplied continuously (or simultaneously) to one or more work lines. .

Alternatively, the child coils may be broken off as a unit before unwinding.This breaking is optionally carried out by a break-off grasping machine carried by a crane, truck fork, or its own conveyor, and the individual coils are can be handled by the end user in such an efficient manner that conventional methods of handling can be shared.

As described above and in detail below, the present invention provides an entirely new method for slicing coils, which overcomes many of the difficulties, drawbacks, and problems of conventional methods, rather than simply confronting them. This problem was solved by removing the source of the problem in advance.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a schematic representation of a generally conventional chopping line for the purpose of providing a detailed explanation of the present invention, with an unwinding table 10, a chopping table 12 and a winding table 14 being shown.

According to the conventional method, a coiled metal plate 16 or the like is mounted on an unwinding mandrel 18 and pulled through a chopping table.

At the chopping table, an upper rotary cutter, shown at 20 (not shown in the figure), is positioned below the strip and enters the IJ tube into a series of narrow strips 2.
It is coupled with a similar cutter that is offset with respect to cutter 20 to cut into pieces.

The strip 22 is then re-wound by a re-wound mandrel 24, and a separating device 26 with a separating plate 28 acts to prevent the ends of the re-wound strip 22 from binding or protruding. ing.

It should be noted in FIG. 1 that the chopping table and the winding table must be placed at a considerable distance from each other in order to create the necessary separation at the winding table 14.

Still referring to FIG. 2, the cross-sectional shape of the sheet 16 differs considerably from the ideal rectangular shape indicated by the dotted line in FIG. This is noteworthy.

As a result, strips cut from the center of the sheet will be thicker than strips cut from areas outward from the center, and therefore will be wound more tightly than strips on the outside.

As can be seen from the diagram in FIG. 1, the outer strip will sag between the shredder and the winder.

Although only relatively small amounts of sag are shown in the diagram, as the shredding and winding operations progress, such sag becomes significant and may require the creation of a pit between the shredding machine and the winding machine. Or the outer space)
A roll device is required to tighten the IJ knob.

All of the above-mentioned problems are solved in the present invention by ensuring that the bond within certain limits is maintained between the IJ tubes chopped by the chopping machine, and that their separation is maintained when wound on the rewinding mandrel. This can be prevented by completing the process after it has started.

Thus, as the sheet 16 is unwound from the mandrel 18 and pulled through the shredder 30 as seen in the diagram of FIG. It is pre-divided into strips 32 while maintaining the same.

Thus, the interconnected strips 32 are connected to the mandrel 36.
When re-rolled, these strips effectively behave as a single sheet.

As a result, there is no need to separate the ends of adjacent strips and there is no sagging of thin strips between the shredder and winder.

In particular, as can be seen in Figure 3, since lateral displacement of the strip at the winding machine is no longer necessary, the winding machine is installed close to the shredding machine. line can be provided.

And, as described below, one device can be used for both partial shredding and final separation.

The compactness of the chopping line is, however, only one advantage of the close proximity of the chopping machine and the winding engine.

Even more valuable is the ability to force a nearly complete course on the strip to form child coils separated by flat sides as the strip is wound.

The instantaneous restraining force introduced by the shredding cutter on the side edges of the shredded strips causes the shredded strips to tighten (during and immediately after shredding as shown here) can be "extended" so to speak by making it behave as a single sheet (by tying the strips together), so that the strip travels a long distance after the shredding cutter before these binding forces disappear. It has been discovered that such binding forces can be "captured," so to speak, by starting the winder to wind the shredded strip.

The child coils thus obtained are separated by a planar interface through which extends an array of bonds which are susceptible to break-off against break-off action.

This restraining force allows a flat interface to be formed despite the inherent bowing of the sheet material to be shredded and the resulting warping of the shredded strips, and also allows the shredding machine to The feed roll that feeds the material is wobbled to some extent to obtain a flat interface.

The close combination of shredder and winder contemplated by the key idea of the invention can also be dispensed with.

However, this can only be done at the cost of reduced basting accuracy, which is undesirable or at least pointless.

Partial pre-slicing or the equivalent can be carried out periodically or non-periodically and intermittently or non-intermittently.

An example of periodic, non-intermittent preliminary shredding is using a shredding cutter with a flat surface to form basting stitches periodically (with each rotation of the cutter) without thinning out the basting stitches between rotations. .

An example of periodic, intermittent pre-slicing is similarly placing a shredding cutter in a position such that basting does not occur, but moving such shredding cutter intermittently so as to cause periodic basting. It is something.

An example of non-periodic, non-intermittent pre-shredding is to prepare a shredding cutter to continuously and thoroughly shred, and then continuously or aperiodicly cut a roller immediately after the shredding cutter. The purpose is to cause the partial reconnection to occur immediately by the action of the rollers, and to allow the action of such rollers to take place without any interruption.

An example of aperiodic, intermittent pre-shredding is where the recoupling rollers are similarly positioned to prevent these recouplings from occurring, but are moved intermittently to cause such recoupling to occur. That's true.

As previously mentioned, pre-slicing can be accomplished in a variety of ways in accordance with the present invention.

For example, the strip may have alternating sections that are completely separated and sections that are slightly separated.

Separated parts may be several feet long or, in the case of thin materials, several inches long, and are held together by relatively short, semi-perfectly separated parts. .

Alternatively, the strips can be successively separated and then recombined as described above.

In some applications, an opposed cutter 31 (FIG. 3) without flat or rake portions may be used, which cuts a continuous shear line between adjacent strips 32 in the step where complete failure occurs. It is also possible to insert it all the way to the front so that the destruction is completed after rewinding has begun.

A portion in which separation and non-separation are alternately repeated can be produced by various methods.

For example, one in which one or both cutters have a flat or other shaped rake on the circumference or near the blade.
The tether or the two cutters can be mounted somewhat eccentrically so that one or both cutters can be adjusted relative to each other in a direction perpendicular to the plane of the sheet 16 by the action of a cam or the like.

The rake of each cutter alone is insufficient to prevent complete separation, but the rake of the cooperating cutter can resist complete separation.

and by advancing or retarding the angular position of one cutter relative to the other by means of a differential drive or the like as the two cutters continue to rotate in the cutter mesh. Resistance forces in the rake section can be introduced or removed.

Combinations of such arrangements are also possible.

All such arrangements providing partial pre-slicing or equivalent cutting may be referred to as "basting arrangements".

The strips being chopped are forced to continue moving together by periodic to non-periodic and intermittent to non-intermittent basting.

Periodic and non-periodic to continuous basting maintains sufficient bonding between the strip ends to allow the chopped strips to be wound together.

The maintenance of such a connection may itself be non-intermittent, or may be interrupted intermittently based on a predetermined plan or other basis requiring it.

An example of demand-based control is shown in FIG. 3, in which a chopping table 30 and a winding mandrel 36 are used to sense sag or tension differentials or other differences that occur as the chopped strip is wound. A sensor 33 may be provided between them.

The sensor may be any suitable sensor, such as a tension sensor or a photoelectric sensor as shown.

Cutter 31 and its cooperating cutter are strip 3
When winding up the two, keep them close enough to continue cutting until the sensor 33 detects a difference.

Then, if the sensor senses a difference, the cutter can be released (not shown) to begin maintaining periodic tacks between the ends of the strips sufficient to cause the strips 32 to be wound together. (not) adjusted by an automatic method.

This state ends after a certain period of time or when the winding difference is no longer detected.

FIGS. 4 and 5 illustrate where "tack-on" sections or periodic partial separations occur.

Adjacent strips 32 are vertically displaced from each other when bitten by the cutter, and return together to their original position when completely separated.

However, in the partially separated region, the adjacent strips remain connected by the portion 48 where the parent metal bridges the metal of the adjacent coil, and as can be seen in FIG. Maintains displacement.

And because of this, the overall thickness of the adjacent strips (considered together as one unit) remains increased, so that the arrangement of child coils formed in the winder is a bridging section. The overall thickness remains increased.

FIG. 6 shows the instantaneous positions of the ends a, b, c, d shown in FIG. 4 when the cutter is biting, with respect to different rotational positions of the cutter.

The rotational position of the cutter corresponds to the path that the plane provided on the cutter passes through the bite between positions e and f.

The vertical positions g and h shown in the figure indicate the height of the top and bottom surfaces of the metal sheet before it approaches the cutter very closely, and the height of the fully shredded part after passing through the cutter. It is also true.

Even if only one cutter is provided with a rake, the cutting action is similar to that shown in FIG.

The corresponding curves will be generally similar to the curves shown, although not exactly symmetrical about the horizontal axis.

This is because even though only one cutter is provided with a rake, adjacent uncut strips 32 will tend to vertically center between the cutters.

FIG. 7 shows the rake portion of a single cutter 61 designed to interact with a corresponding cutter without a rake portion (not shown).

A scoop portion is provided on the outer edge 62 of the circumference by a flat surface 63, and both ends 64 and 65 of the scoop portion are smoothly shaped toward the circumference of the cutter.

In a preferred form of the invention, ``tacking'' does not allow the overall thickness to remain increased as seen in FIG. By passing through, the tacking is pushed back.

The spacing between the pressing rolls is such that the gap is slightly larger than the thickness of the metal sheet before it is cut into pieces.

The bridging portion 48 is thereby partially sheared and the adjacent chopped strips of the tack portion are returned to their respective positions.

Although not in many applications, it has been found that in at least some cases, the above-described tacking allows the child coil to be wound in a good course without overlapping ends, even without arrangement.

It has been found that in this case, as mentioned above, the restraining force introduced by the shredding rolls acted on the side ends of the child coils, which were captured during winding.

In an experimental assembly apparatus shown in FIGS. 13 and 14, a 0.015-inch thick steel coil 121 (FIGS. 13-14) is guided 122 and rotates a 3-inch chopping cutter 1.
23, it is unwound through the pressure roll 124, and then wound onto a mandrel 125 driven by an electric motor via a suitable reduction gear.

The control rod 127 transmits work to the upper cutter 123 to change the rotational position of the eccentric mounting base by means of the gear shown in the figure, thereby adjusting the gap between the cutters.

Each ring of the lower cutter 123 has a flat surface as shown in FIG.
The maximum depth from the cutter circumference (maximum distance between chord and arc) is 0.006 inch.

Each of the cutters 123 consists of a disc and a cutter body 130 that are maintained at a constant distance, and the upper and lower cutters work together as a pair to shear the metal.

Also, the sleeve 13 is elastic so as to push the sheared metal away from the shearing force when the metal separates from the biting part.
1 is provided.

A crank 132 is provided so that the upper cutter 123 can be manually driven during assembly.

The tacks created by the planar portions of certain dimensions remain well connected after passing through the tacking rolls, and the chopped strips are wound together into a plurality of child coils 140 (FIG. 9). This constitutes the parent coil 141.

In the example shown, the two outermost child coils 140
a constitutes the end of the strike IJ tube and is therefore considerably narrower than the other child coils.

When the rod 127 is shifted so that the upper cutter 123 is lowered, there will be no tacking and continuous fine cutting will occur.

The strip continues to follow a good course as it is wound to form a child coil.

As soon as it is detected that one of the outermost or next outer child coils is slightly disturbed or loosened, the bar is shifted up again so that the upper cutter is raised and the tack formation is resumed. happen.

The disorder and looseness disappear as the chopped strips become rolled together by the restraints of the tack.

Figure 10.11 schematically shows a cross-section of the shredded strip immediately after leaving the pressing roll.

FIG. 10 shows a partial tack, where the bridging portions between adjacent strips have been sheared somewhat, but not completely separated.

FIG. 11 shows a completely chopped section.

Due to the crown shown in FIGS. 10 and 11, which is thicker in the center of the plate, the child coils near the ends forming the parent coil are wound more loosely than the child coils in the center.

However, the child coils all have the same number of turns per unit length because they are constrained to be wound together.

Such tack connections between adjacent child coils are contained entirely between the front and rear surfaces and surfaces of the sheet metal.

The anterior and posterior surfaces are not continuous across the tack, even if the cut is completely interrupted at the joint.

The opposite end surfaces of adjacent child coils produced by the thin cutting operation each have a continuous edge over the entire length of the child coil, including the tack-attached portion.

The minimum restraining force required only to cause the chopped strips to be wound together was established by tacking or connecting the strips in the manner described above.

In the above example, if any one of the child coils is detected to be undisturbed or loose, the upper cutter will not be raised abruptly, but instead the bond will survive at the pusher bar and the strip will remain together until it is wound onto the mandrel 125. Move the bar so that a minimum degree of tacking occurs that is too weak to attempt to hold.

Movement of rod 127 continues until there is just enough tacking to force the strips to be wound together.

When this binding force occurs, the upper cutter is maintained in its position or preferably lowered to repeat the cycle again.

This lowering of the cutter is done gradually and continues until loosening or disturbance is detected again.

Such manual controls could obviously be replaced by automatic devices that would effectively move back and forth between barely able to maintain restraint and barely able to maintain restraint. can move to.

Instead of using the 0.006 inch deep plane shown in the figure, a slightly more symmetrical tacking of 0.003 inch deep planes on the upper and lower cutters 123 that interact with each other is for the purpose of making the work easier. will be adopted in

In such a case, the upper and lower cutters 123 are synchronized in their rotation by gears so that proper resistance of the plane is maintained.

In the illustrated example, the cutters 123 are not connected by gears.

It is also conceivable to use shapes other than flat to better control the strength of the tack by adjusting the rolls.

For this reason, the scoop part in the shape of a seagull's wing formed by a set of arcs is ground by a cutter and the eighth
As shown in the figure.

- The point where the arc of the set touches the circumference of the 3-inch cutter is 0.
125 inches apart.

The centers and radii of these two arcs are 0.0 mm from the circumference of the roll.
They are so large that they intersect below 0.006 inches.

More preferably, a set of cutters rotated synchronously by gears can be provided with similarly shaped rake portions.

Each rake section is formed by arcs that intersect at a depth of 0.003 inches.0 When using this rake shape, the connecting bridge formed by the rake sections varies depending on the spacing of the rolls. The cross-sectional shape of the section also varies in a constant direction to allow for more precise control.

As the cutter gradually becomes more deeply engaged with the roll having the rake part of this shape, the rake parts, which have mirror symmetry and are shaped like "seagull wings", gradually overlap and the size decreases. It begins to form a smaller diamond shape and eventually disappears.

However, the degree of tacking required to restrain the winding is probably completed before such portions disappear.

When upper and lower cutters with resisting scoops are rotating synchronously, advancing one cutter relative to the other will cause the aforementioned diamond shape to tilt. .

Such a tilt can be tilted forward or backward depending on the relative movement that advances the angle.

Any conventional control method for creating an angular differential can be used for such advance angle.

The two cutters can be moved back and forth in the direction in which the cutters engage and are advanced relative to each other, so that different tacking effects can be achieved.

Once you become familiar with a certain sheet material, you may choose to pre-set it to a level of basting.

One feature of the present invention is that the degree of bonding force between child coils can be practically improved for each parent coil by adjusting the strength and frequency of tacking.

The intensity and frequency of such tacking can be adjusted by increasing or decreasing the cross-sectional area of each tacking, by adjusting the frequency, or by adjusting the degree of intermittent work.

In the apparatus shown in FIG. 3, a pressing roll 35 may be used which cooperates with a similar roll provided on the underside of the strip.

By using pressure rolls, the appearance of the coil wound around the mandrel 36 is similar to that of the coil 141.

124 in place of the function as a pressing roll.
and the roll as shown in FIG. 335 is placed by means of suitable shims or the like such that the spacing is approximately equal to, and preferably slightly less than, the thickness of the sheet material to be cut, and cut with a shredding cutter. It may be set to continuously cut into small pieces.

Under at least some circumstances, when the shredded portion formed by the shredded cutter passes through rolls 124-35,
It was found that these recombine to complete an aperiodic tack.

Special experimental assembly equipment, such as that shown in Figures 13 and 14, cuts a perfect steel plate 0.005 inch thick into strips (not shown) and o, ooi inches to 20 inches depending on the thickness of the worm
The rolls 124 are spaced apart to provide a nominal reduction of %.
This phenomenon occurred by passing through the space.

However, any actual reduction in width growth of the sheet is difficult to observe and is not considered significant.

The shredded sections were tacked or recombined by the rolling operation, and the bond appeared to be stronger in the direction of sheet travel than in the direction perpendicular to the sheet.

This recombination is not clearly understood at present, but it is thought to be something like a pressure welding phenomenon, or a mechanical joining of fragments formed by cutting or something similar.

In FIG. 12, this paris is schematically shown as a small curve at the upper and lower parts of the thinly cut portion.

FIG. 12 is a schematic illustration of a cross-section of sheets tacked aperiodically as just described; Such mutual bonding may also occur at locations similar to or even beyond the outer edges of the interface shown.

The operation as described above is non-intermittent since the shim cannot be changed during shredding.

Mutual coupling between child coils, such as that shown in coil 140, can be broken by unwinding or breaking all the couplings simultaneously.

In the experimental apparatus shown in FIGS. 13 and 14, the mandrel 1
25 from the winding table with the coil 141 attached,
Unwinding and separation can be performed by inverting both ends and replacing the original unwinding mandrel (roll 121 that has not been cut into pieces) on the unwinding table.

A wedge 134 is pivoted to a slide 135 (Fig. 15) on which one first child coil 140 or 140a can be moved within a frame 136 (Fig. 13.15).
It is pulled over the top and through suitable guides such as pressure rolls (released when the cutter gets in the way).

The ends of the other child coils 140 are tied to the parent coil 141 to prevent them from flapping or coming loose.

As can be seen in FIG. 15, the wedge 134 is thinnest on the inside and increases in thickness toward the protrusion of the outside shaft.
Provides good lifting or leverage.

Unwinding may be performed manually by pulling the unwound strip.

When unwinding the child coil, the slide 135 is wedged 13
It follows the decrease in the outer circumference of 4.

A light drag is applied to the parent coil 140 to prevent overshoot.

The unwinding strip is easily and cleanly cut off from the parent coil.

After this, tighten the groove 136 so that the wedge is in the appropriate horizontal position.
The next child coil can be unwound in the same way by moving the bracket of the frame provided with the child coil laterally by the width of the child coil.

The bracket is held in the adjusted position of the frame, which is fixed by the fixing bolts shown in the figure.

The strip upon winding achieved by the invention notwithstanding the fact that, as previously mentioned, there is almost unavoidable warping in sheet materials and therefore the chopped strips formed therefrom will also inevitably warp. The restraining force of provides a flat interface between the child coils.

Figures 16 and 17 show very schematically the situations in which warping, curling or reversal can occur, for example, by slight changes in the feed to the shredding cutter. .

In Figure 17, the interface between adjacent pairs of hand coils is flat despite the warpage, and the ends of each child coil and the ends of the parent coil are shown to have a degree of warpage in the strip material along its length. As a function of direction and direction, each winding stiffness varies incrementally along its length over and above the changing tendency of the crowning of the sheet from which the coil is formed.

FIG. 16 shows the coil shown in FIG. 17 developed and shown on a reduced scale, showing that the warp has a tendency to undulate or reverse.

Even in this situation, the outer ends of the parent coils are very even, as seen in FIG. 17, and the interfaces between adjacent child coils are also flat, as shown.

Figure 17 also shows portions of the scrap disc-shaped coils, designated 34a, which, as previously mentioned, protect the ends of the parent coil during transshipment, and which may be used before or during final shipment. It can be broken off or unwound from the parent coil by the user.

Such discs are not specifically shown in FIG. 3 because they are very small in size.

The outer ends of the parent and child coils are taped together to prevent unraveling until the next turn of material.

For shipping, pass the parent coil through the core of the coil to
It is preferable to bundle them with three bands separated by an angle of 100 degrees.

At this time, the disk-shaped scrap coil 34a serves to protect the binding band from digging into it.

It is also shown in Figure 17 that although the outer end portion of the coil is highly irregular, the inner interface is flat.

When the child coil is unwound rather than broken off from the parent coil, the unwinding may be arranged to provide a spreading effect.

By doing this, the path of motion of the separated IJ tube will have a vector component parallel to the axis of the roll.

Movement along such vectors cannot be accommodated by bending the strip material about the roll axis.

On the contrary, the resistance increases due to the reaction force acting parallel to the shaft and the surface of the st-IJ tube material.

Therefore, an unwinding arrangement that includes a separation motion with such a vector component can very efficiently concentrate tensile stress on the tacking part that causes a good destructive action.

In one example case, this can be achieved by gravity alone, and by its own weight when the starting end of the outermost child coil is dropped from the bottom end of the parent coil tilted towards a vertical position. Continue unwinding.

If you unwind the experimental coil you have in your hands using this method,
The first child coil is rapidly unwound in a falling spiral and piled up as a loose strip on the floor.

At this point, the parent coil remains intact, and the side surface of the second closest child coil has a smooth, well-defined surface.

The special arrangement for the final cut is shown in FIG.

The child coil 88 has now been unwound from the parent coil 89, and the unwound portion is indicated by the number 90.

In this case a levering blade 91 is provided to aid in separating the child coils and is clearly shown in FIGS. 19 and 20.

This blade is bolted onto a wedge 92 over which the unraveled portion slides and under which the wrapped portion of the child coil 88 passes.

The unraveled portion slides over the top surface 93 of the wedge 92.

The wedge 92 is supported on the flange 97 by an axis bolt 94.

Axial bolt 94 is provided with a spring 95 to facilitate rotation of wedge 92, which is shown in a horizontal position.

A flange 97 projects from a crosshead 98 that slides vertically on four columns (two of which are shown) and from the crosshead a set of pedestal supports (one of which is shown). (shown) are prominent.

Since the crosshead is moved up and down by the action of the cylinder 96, the lower side of the groove 92 can be directly bundled onto the portion still wound around the child coil 88.

The tip of the blade 91 is wedged 9 as shown in the figure.
2, the blade partially protrudes into the shear wire that is the next winding of the child coil, and when the blade rotates, it is used as a preliminary separation prior to being actually unwound. I'm trying to make something happen.

Or even if there is no such effect, it at least helps that the blade 91 is located just at the edge of the adjacent layer that is still wound into a coil.

In some cases, such pre-setting or positioning aids are not required, in which case the hanging portion of the blade 91 can be eliminated.

The levering blades 91 are used to break to a sufficient extent the bond remaining between the adjacent still-wound layer of the coil and the top-turn of the child coil being unwound. Acts as a horizontal wedge or lever.

As alluded to in the previous discussion, the action is more like a wedge or lever action than a cut.

It will be appreciated that various combinations of partial chopping and separation techniques may be used in accordance with the present invention.

After partial shredding is performed by any of the various methods described above, cutting may be performed by any of the methods described herein at any time after winding has begun.

Another aspect of the invention is that final separation may occur at the time of rewinding.

As shown in FIG. 21, one possible way to complete the cuts made at chopper 30 is to use a contoured bending bar 38.

The bending rod 38 holds the interconnected strip as it rewinds and approaches the second overlap of coils formed on the mandrel 36.

Since the thickness increases at the connecting bridging part, rod 3
The pressure pressing the strips at 8 breaks any remaining bonds between adjacent strips, and the cut is completed just before the strips enter the second stack of coils.

Preferably, an endless belt 39 is provided between the bar 38 and the coil being formed to prevent scratching or other damage to the surface of the strip being wound; It is driven by a pulley 40 which is driven by a gear 41 which meshes with a gear 42 fixed to the side cutter shaft.

An alternative method is shown in FIG. 22 in which rollers 43 can be used in place of rod 38 to complete the cutting of the strip as it enters the second layer.

From this point of view, it is possible to provide a dividing roller 43 with a relatively large diameter area in contact with the adjacent long ends of the strip.

The large diameter rollers are then interconnected by small diameter sections 45.

Furthermore, there is a different method, not shown in the figure,
A sharp rotating cutter driven by a motor may be placed at the rewinding mandrel to complete the cut between adjacent strips after the strips have begun rewinding onto the mandrel.

Of course, the unbroken portions between adjacent strips can also be broken simply by controlling the rewinding tension, which is particularly successful when the material being chopped is somewhat brittle.

The compactness of the chopping line resulting from the partial chopping technique of the present invention allows the separation mechanism to be combined with a partial chopping device that performs specialized chopping.

In this manner, as can be seen in the diagram of FIG. 23, the sheet 16 is unwound from the mandrel 18 and passed through the cutting device 50 before being re-wound onto the mandrel 49.

In the cutting device 50, a pair of opposing cutters 52 and 54 are arranged above and below the sheet, similar to the opposing cutters 31.

However, the cutter 54 has a satellite cutter 56 on its outer periphery, and a spring loads the cutter 54 radially outward.

Mandrel 49 is mounted for movement in the direction indicated by arrow 58.

By doing so, the relative position of the cutter 54 and the adjacent surface of the coil formed on the mandrel is maintained during the winding operation.

Thus, as the strip 16 passes between the cutters 52 and 54, it is chopped into a plurality of narrow strips except in the area where the strip 16 is contacted by the spring loaded satellite cutter 56.

The pressure of spring 60 causes cutter 56 to completely cut strip 16 when the strip passes between cutters 52 and 54.
is selected such that it is insufficient to pass.

However, when the partially cut portion formed in the strip is again engaged by the satellite cutter 56, the partially cut area is now sufficiently weakened that the cutter 56 is You can complete the cut you made.

The distance between the areas that have been partially chopped by the satellite cutter 56 is a function of the diameter of the cutter 54, such that after the strip begins to rewind, the areas that have been partially chopped are accurately presented to the satellite cutter. There is an automatic synchronization effect that allows the

[Brief explanation of the drawing]

FIG. 1 illustrates a conventional thinning line. FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. FIG. 3 shows a chopping line according to the invention. FIG. 4 is an enlarged sectional view taken along line 4--4 in FIGS. 3 and 5. FIG. FIG. 5 is a sectional view taken along line 5--5 in FIG. 4. FIG. 6 shows the fourth section at different rotational positions of the chopping roll.
FIG. 6 is a view showing the instantaneous position of the end portion of the cutting engagement portion shown in FIG. 5; FIG. 7 is a partial view of a cutter blade with a rake portion employed in the present invention. FIG. 8 shows a cutter blade with a rake portion of another shape employed in the present invention. FIG. 9 is a diagram showing a coil configuration expected according to the present invention. Figure 10.11 is a schematic cross-sectional view of a straight section of the chopped strip seen in Figure 13, cut at different positions before being wound into a coil. FIG. 12 is a schematic cross-sectional view of a straight section of the chopped strip seen in FIG. 13, cut prior to being wound into a coil. However, the machine settings are slightly different from those for making a strip with the cross-sectional shape shown in Figure 10.11. FIG. 13 is a partially cutaway side view of a schematic implementation of the present invention. FIG. 14 is a distal side view thereof, partially cut away. FIG. 15 is a diagram of the cybbing used in this model. FIG. 16 shows a shortened view of a stretched plate of metal sheet with undulations or reverse camber. FIG. 17 is a highly schematic cross-sectional view of a part of the coil arrangement, ignoring crowning. FIG. 18 is a schematic side view illustrating a method for separating a partially cut child coil in a used state. 19 and 20 are partial plan and front views, respectively, showing a part of the apparatus shown in FIG. 18. FIG. 21 is a schematic side view, partially in section, of the operation according to the invention when the separation is accomplished in a coil; FIG. 22 is a diagram similar to FIG. 21, but showing an improved operation for accomplishing the separation. FIG. 23 shows another example of a cutting operation for completing the separation. In the figure, 10 is an unwinding table, 12 is a thin cutting table, 1
4 is a winding stand, 20 is a cutter, 22 is a strip,
30 is a thin cutting machine, 32 is a strip, 123 is a thin cutting cutter, and 130 is a cutter body.

Claims (1)

[Claims] 1. A rotatably driven substantially circular cutter having a cutting edge on its outer periphery that cooperates with the outer periphery of another cooperating cutter, and having a rake portion formed on its outer periphery. and
The radial depth of this rake portion is less than or equal to the thickness of the metal sheet material to be cut, and the outer peripheral edge defining the rake portion constitutes a part of the cutting edge that extends over the entire circumference of the cutter. This allows the cutting edge to be continuously introduced into the metal sheet material throughout one rotation of the cutter, and with other cooperating cutters, the metal sheet material can be completely cut at some portions of its cutting line and not interrupted at other intervals. A rotary cutting cutter characterized in that the rotary cutting cutter is installed in a shearing relationship so as to cut incompletely in a portion corresponding to a scoop portion which is arranged in a circular manner. 2. The rotary cutting cutter according to item 1 above, wherein the scoop portion is an arcuate plane. 3. The rotary cutting cutter according to item 1 above, wherein the scoop portion is shaped like a seagull wing. 4. The rotary cutting cutter according to item 3, wherein the seagull wing-shaped scoop portion is formed from a pair of convex arcs that converge to each other.