FI66779B - SLITSNINGSAPPARAT FOER METALLPLAOT - Google Patents

Description

66779

Sheet metal cutting machine

By division separated from the application 76 2595

The invention relates to a rotating cutting blade unit having cooperating cutting blades for continuously cutting a web of elongate sheet metal material along a cutting line such that the web is completely separated along a portion of the cutting line and at spaced points along the cutting line the web is only partially cut that the material on opposite sides of the cutting line is joined by fasteners formed by partially cut web material, the rotating cutting blade unit comprising a generally circular cutting blade body rotatably operable, the outer circumference of the cutting blade body defining the cutting edges and the cutting blades on the outer circumference of the cutting blade body.

According to the present invention, the roll slitting is performed in a step which allows all the strips cut from one web to be rewound into a single unit and thus avoids the traditional strip hanging and overlap problems of roll length cutting. When the uncut web is unloaded from the unwinder 25 and passed through a slitter, it is only partially cut or completely cut and immediately afterwards weakly re-joined to form corresponding or partial slits, resulting in a series of interconnected strips 30 fed to the winder as a single web. . After that, after rewinding, i.e. at any time from the time the interconnected strips begin to wrap on the reel roll, to the time the sub-rolls are unwound for use, partial cuts or the like made by the slitter 35 can be completed to provide separate and narrower sub-rolls. Because the interconnected strips behave like a single web until the partial cuts or the like made in the cutter are completed, the strips can be processed as a web during winding without having to worry about strip dependencies, overlaps, and any consequent problems and difficulties.

The cutting blade unit according to the invention is characterized in that the radial depth of the formation is such that its edges are cutting edges which coincide with the cutting edge around the rest of the outer circumference of the cutting blade body to form a continuous uninterrupted cutting edge which continuously penetrates the web.

In a conventional longitudinal or strip cutter with a pair of opposite rotating blades for each cut, there is a momentary displacement of the adjacent edges of the strips of cut rolls perpendicular to the plane of the web or strips. When using the present invention, the same momentary displacement can occur at points where the cut is complete, i.e. a transient but available series of interconnected strips may also have some relative displacement of adjacent edges at locations where the cut is incomplete, which displacement can be maintained until adjacent strips are separated if the strips are not knocked back down to the same level connection to what is currently recommended. 30 separation tools can then be used to separate the strips. Or, the adjacent edges of the strips may return from their instantaneous transition positions at all points in the practice of certain embodiments of the invention, especially when the web is completely cut (through) and immediately reassembled weakly.

3,66779

If the interconnection of the strips after partial cutting or the like is sufficiently weak, the bending bar or the down bar can be kept resting on the surfaces of the interconnected strips and, if desired, an endless belt or belts can be placed between the rod and strip surfaces per level or by suddenly squeezing it out of the common level. Alternatively, separation or wedging tools may be used to separate the strips either during post-cutting winding or during final unwinding. Or, the daughter rolls formed by partial cutting or the like can be torn off the mother roll either simultaneously or individually.

Of course, other separation tools can be used, including, but not limited to, sharpened rotating blades that cut through the connections between adjacent strips, i.e., ties when rolling the strips after 20 partial cuts or at any time after the start of rolling but before final use.

It will also be appreciated that in certain circumstances an additional device to complete the surgery may be necessary. Thus, when partial cutting results in a series of interconnected strips with still interconnected portions at their edges that have moved away from each other approximately perpendicular to the plane of the strips, by adjusting the rewind tension, the remaining ties between the strips can be broken when rolled into a tight roll. Partial cutting or the like may also result in a connection that is maintained until these interconnected strips are bent around the winding axis when the strips roll-35 are loaded into a roll, whereupon rupture may occur due to bending at the beginning of the winding. Or, the connection between the belts can be satisfactorily broken only when they run in different directions around the winding axis, i. the second strip is bent straight, such as when unloading 5 of the other two interconnected strips while the other remains on its roll. Or the connection may or may not detrimentally withstand this different orientation of the adjacent strips, but still give way to the effect of the application forces between the strips due to the "rigid plane effect" of the interconnected strips resisting these application forces. Alternatively, a combination of described bending or deflection bending and said application may be used, such as unwinding a strip from a roll by pulling it along an unloading path having a vector component parallel to the roll axis, or simply tilting the roll axis from a horizontal position to a vertical or vertical position to allow gravity unloading bet. Alternatively, the daughter rollers can be broken off the mother roll either simultaneously or one at a time without the use of special tools, simply by hitting or squeezing, e.g. dropping or forcing the mother roll against a flat or step surface or by hitting or swiping with a fork or crane hook or the like. or sit-25, the removal of the daughter roll is simply performed with a hanging weight with the mother roll resting on a mandrel or the like. This can be done when the heavy roll has relatively few and / or very weak ties.

The shapes of the cuts made in part during the longitudinal cutting or similar work step can be widely varied within the scope of the present invention. The blades can, for example, be provided with small profiled planar surfaces or chamfers sanded on the adjacent surface of the cutting edge of the blade to form bonds, i.e. joints, in the area of the cutting slits made by the blade. Shapes 66779 other than planar surfaces or chamfers may be used to provide bonds, as described below.

In one variation, the cutting blade formation is a tendonous plateau.

5 In another variation, the formation is a radial recess in a plane perpendicular to the axis of the cutting blade body, the recess having converging curved sides terminating approximately at the center of the recess.

The formations in the upper and lower blades can be brought into and out of alignment as the blades rotate to alternate between full cuts and deficient, i.e., bandage, cuts.

In the present invention, the cutter and winder of the longitudinal cutting line can be proportioned in a new way, taking advantage of the relatively close position of the cutter and winder and thus maintaining an instantaneous parallel control state affecting the edges of the strips forming the daughter rollers due to cutting blade operation. The proximity of the cutter and the winder is therefore a positive feature of the preferred procedure of the invention.

An important advantage of partial shearing or the like of the present invention is, as mentioned above, the elimination of the adhesion problem. A conventional approach to this problem is to use separators between the cut strips, which in turn makes it necessary to position the cutter quite far from the reel to allow the cut strips to move transversely apart to separate them. Since lateral displacement is no longer necessary when using the cutting device according to the invention, the cutter does not have to be placed considerably away from the winder, which in turn results in a much narrower or shorter processing line and thus a substantial saving of floor space. In this way, not only has the need to place the cutter and the reel at a considerable distance from each other eliminated, but on the contrary, significant functional improvements have also been achieved. placing equipment parts close to each other. It will be possible to carry out the longitudinal cutting as soon as the material comes from the rolling mill, such as in the vicinity of the last rolling stand of the successive cold rolling mill or the tempering rolling mill.

When the end user performs the final separation, the elimination of the individual feeding and handling of the individual rolls is the main advantage of the invention. Instead, the original parent roll can be formed into a roll structure comprising a series of daughter rolls that can be processed together until they are separated from each other by the end user or wholesaler or broker. A particular advantage is the improved handling of waste pieces and the improved protection of the rolls during transport. The edge baling strips can be rolled into disc-like rolls at the ends of a series of rolls of ordinary daughter rolls, rather than being baled, crushed or rolled in a conventional manner. The purpose of these 25 disc-shaped rollers is then to protect the edges and ends of the extreme daughter rolls during transport and can be easily broken off at the place of use of the roller and in some cases even treated as a single unit until remelted or otherwise recovered.

66779 The final separation of this roller structure can be performed by unloading the daughter rollers one by one, which can be supported together with a spindle or unloading rack to be unloaded successively (or even simultaneously) and fed to the work line or lines. Or so the daughter rollers can be broken off completely before unloading.

This can optionally be done by means of crane or fork-lift trucks or their own supports or the like, so that the end user can handle the 10 daughter rolls efficiently, but in a way that is compatible with the procedures previously used for handling individual rollers.

From the above and the following detailed description, it will be appreciated that the present invention provides a completely new solution for cutting lengths into strips and eliminates many of the difficulties, disadvantages and problems associated with conventional methods without attempting to overcome these problems but simply eliminating their root cause. Other advantages of the invention will become apparent from the following description of the drawings, in which Figure 1 is a perspective view of a previously known longitudinal section line, Figure 2 is a sectional view taken along line 2-2 of Figure 1, Figure 3 is a perspective view of a longitudinal section line 25, Figure 4 is an enlarged sectional view; 5 is a sectional view taken along line 5-5 of Fig. 4; Fig. 6 is a diagram of the instantaneous positions of the edges of the strips in the longitudinal nip shown in Figs. 4 and 5 with the cutting blades in different rotational positions; 66779 Fig. 7 is a partial view of such recessed edged steel Fig. 9 is a perspective view of a roll structure 5 according to the invention, Figs. 10 and 11 are schematic sectional views across the straight extent of the cut strip shown in Fig. 13 at different points on the strip before it is rolled on a roll; structure Fig. 12 is a schematic cross-sectional view of the straight extent of the longitudinal section seen in Fig. 13 before it is rolled with the machine positioned somewhat differently than when it produces a strip whose cross-sections are schematically illustrated in Figs. 15 and 11.

Fig. 13 is a side view, partly in section, of a machine according to the invention.

Fig. 14 is a partial end view of the former, Fig. 15 shows a separating tool used in the machine, Fig. 16 is an abbreviated view of a sheet web with a serpentine or tortuous curvature, Fig. 17 is a very schematic sectional view of a part of a roll structure according to the invention , Fig. 18 is a partially sectioned schematic side view of a device for separating daughter rolls at the site of use; Figs. 19 and 20 show a partial top and side view of a portion of the apparatus of Fig. 18, respectively; Fig. 21 is a partially sectioned schematic side view showing the operation of the invention when rolled to the end, 66779 Fig. 22 is a view corresponding to a cube 21 showing a modified operation for performing the separation, and Fig. 23 is a side sectional view showing a longitudinal section showing another operation for performing the separation.

5 To illustrate the background, Figure 1 of the drawings shows more or less schematically a conventional longitudinal cutting line comprising an unloading station 10, a longitudinal cutting station 12 and a winding station 14. According to accepted practice, a roll of sheet metal or the like 16 is placed on a discharge spindle 10 18 and passed through a longitudinal cutting station 12.

In the longitudinal cutting position, the rotating upper blades 20 co-operate with similar lower blades (not shown) placed under the belt and offset to longitudinally cut the strip or web relative to the blades 20 into a plurality of narrower strips 22. These narrow strips 22 15 are rewound on a rewinding mandrel 24. the function of the separating device 26 is to prevent the edges of the rewinding belts 22 from overlapping.

It can be seen from Figure 1 that in order to achieve the necessary separation in the winding station 14, this must be located 20 quite far from the longitudinal cutting station 12.

Furthermore, referring to Figure 2 of the drawings, it will be seen that the cross-sectional shape of the plate (web) 16 differs quite from the ideal rectangular shape shown in broken lines in Figure 2, with the center of the web actually being much thicker than its edges. As a result of this, the strips cut from the center of the web 16 are thicker than the strips cut from the center outward areas, and therefore the center strips are rolled tighter than the outer strips.

It follows, as can be seen from Figure 1 of the drawings, that the outer strips depend on the slitter and the winder. Although only a relatively minor dependence is shown in the drawing, it is apparent that as the slitting and winding process progresses, the dependence increases, requiring pits to be formed between the slitter and winder or a track to guide the outer strips tortuously above the longitudinal or strip cutting line.

All the problems described above are overcome by the present invention by maintaining a limited connection between the strips cut at the longitudinal cutting station and by completing their separation only after the strip web has started to be wound on the rewind spindle. Thus, when the web 16 is unwound from the roll 10 on the mandrel 18, as seen in Figure 3 of the drawings, and passed through the longitudinal cutting station 30, it is pre-positioned on the strips 32 while maintaining a limited connection therebetween, as indicated by the dotted lines 32. Thus, when the interconnected strips 32 are rewound on the spindle 36, they actually behave like a single web, i.e., a continuous thin sheet.

Therefore, it is not necessary to keep the edges of adjacent strips apart and the thinner strips do not hang between the slitter and the winder. As can be seen particularly clearly in Figure 3 of the drawings, the reel can - since the need for lateral transfer of the strips at the reel is eliminated - be placed next to the slitter, resulting in a much narrower, i. a shorter longitudinal section, as described in more detail below, and it becomes possible to use a single device, i.e. a work unit, for both partial longitudinal cutting and final separation.

However, the compactness of the longitudinal cutting line is not the only benefit of the proximity of the cutter and the winder. More significant is the provision of a forced connection of the straps during winding in order to cause them to rotate under almost complete control into daughter rolls separated by flat side surfaces. It has been found that the momentary constraints applied to the edges of the cut strips by 66779 longitudinal blades can be "extended" by causing the longitudinal strips to behave like a single web (by tying the edges of adjacent strips together during or immediately after longitudinal cutting, as described herein). "maintain" i.e. to do the winding in part by introducing the longitudinally cut strips into the winder before these forced connections are lost as the strips continue to pass away from the cutting blade. The result is daughter rollers separated by flat dividing surfaces through which breakable ties pass, which can be neatly cut with a shear effect. Forced connections can provide such flat dividing surfaces despite the almost incredible curvature in the web material to be cut and the resultant curvature of the cut strips and even in spite of the slight sieve deviation in the roll feeding the web to the cutter.

The close connection of the cutter and the winder according to important aspects of the invention can be dispensed with, but only at the expense of a reduction in the control accuracy, which is often unacceptable or at least inappropriate.

Partial pre-cutting or the like may be performed intermittently or non-intermittently and intermittently or non-intermittently. An example of intermittent non-intermittent pre-cutting is the use of planar surfaces in a longitudinal cutting blade to provide ties, i.e., fasteners, intermittently (with each turn of the blades) without the ties jumping during the turns. An example of intermittent intermittent pre-cutting is a similar arrangement in which the longitudinal cutting blades are positioned so that no bonding occurs, but in which these blades are intermittently (periodically) moved to provide intermittent bonding. An example of non-intermittent 66779 non-intermittent pre-cutting is the use of blades that continuously perform a complete longitudinal cut, immediately followed by partial re-joining of rollers or rollers immediately behind the longitudinal cutting blades without interrupting the re-engaging rolls. For example, non-intermittent intermittent pre-cutting is positioned so that this re-bonding does not occur, but where these rolls (rolls) are intermittently moved, i.e., intermit-10, to perform re-bonding.

As noted above, pre-partitioning can be performed in many different ways according to the invention. For example, alternately completely separated and less than completely separated parts can be formed in the strip. The separated parts, e.g. a couple of meters in length or a couple of thirty to 15 centimeters in the case of thinner material, are joined with relatively short, less than completely separated parts. Alternatively, the tape can be continuously separated and then reassembled, as mentioned above. In some cases, it may be possible that the opposite blades 31 2Q (Fig. 3) can be used without planes or recesses and set to make a continuous line of intersection between adjacent strips 32 as the strips are cut to near rupture point, and breaking is completed only after rewinding. started.

Alternating separated and inseparable areas can be provided in a number of ways, including attaching one or both blades somewhat non-centrally, providing one or both blades with planar surfaces, bevels, or other forms of material removal near their circumferential or cutting edges, providing a second cam operation, and the like. or to position both blades in perpendicular directions to the plane of the web 16.

66779

The ejection points of each blade, i.e. the recesses alone, may be insufficient to prevent complete separation, but may be able to do so when aligned with the associated blade plane or recess, and these ejection points may be brought into and out of the 5 alignment by "promoting" or "leaving" the other blade angular position. with respect to the second blade by means of a differential drive or the like as they both continue to rotate through the blade gap. Combinations of these arrangements are possible.

All of the above arrangements for achieving partial 10. pre-cutting or the like may be referred to as "binding arrangements". The longitudinally cut strips are made to continue to move together intermittently or non-intermittently and as a result of "interlocking" intermittently or non-intermittently.

Both intermittent and non-intermittent, i.e. continuous binding, means maintaining a connection between the edges (edges) of the cut strips which is sufficient to allow the cut strips to be rolled together. Such connection maintenance may itself be non-intermittent or may be made intermittent, i.e. intermittent, with interruptions on either the pre-programming or on-demand basis.

As an example of "on-demand adjustment", as shown in Figure 3, the sensor 33 may be placed between the longitudinal cutting station 30 and the winding mandrel 36 to measure hanging or tension or other differences or starting differences in the winding of the cutting strips. The sensor may be a suitable device, such as a tension sensor or, as shown, a photoelectric sensor.

The blade 31 and its counterblade are placed close enough for continuous longitudinal cutting until the sensor 33 detects differences or incipient differences in the winding of the strips 32, after which the blades are distanced 30 or otherwise moved by an automatic device 14 66779 (not shown) sufficiently to begin intermittent banding of the edges 32. sufficient to enable them to be wound together. This state can be eliminated after a certain time, in units of length or time, or when no more differences or starting differences are detected in the 5 rolls.

Figures 4 and 5 illustrate the shape that can occur in the binding region, i.e. the periodic, partially separated region. Adjacent strips 32 are moved vertically relative to each other as they contact the blades, and resilient together as they are 10. completely separated from each other. However, in the partial separation zone, the adjacent strips remain interconnected due to the parent metal bond, i.e. the bridge 48, which joins the metal of the adjacent rolls together and maintains the vertical displacement of the adjacent strips 32, as shown in Figure 5, and thus also maintains the total number of adjacent strips. considered as a whole) and thus also in the areas of the increased total thickness of the bridges in the layers of the daughter roll assembly formed in the winding.

Fig. 6 schematically shows the instantaneous positions of the edges a, b, c, d of the edges shown in Fig. 4 in the blade spacing as a graphical representation of the different rotational positions of the blades. The rotational positions of the blades, which correspond to the passage of the planar surfaces of the blades through the gap, are between positions e and f. The points g and h on the vertical (Yaksel) of the diagram represent the height of the top and bottom surfaces of the metal-25 web before they approach the blade and the height of the fully cut portions as the web passes through the blade.

Although only material has been removed from the circumference of the second blade, i.e. it has been made flat, the cutting operation is similar to that shown in Fig. 6.

15 66779

Even if the corresponding curves are not exactly symmetrical about the horizontal axis, they would be approximately similar to the curves shown, as adjacent as yet indistinguishable strips 32 tend to center vertically between the blades, although only one blade is flattened or recessed in its circumference.

Figure 7 illustrates the shape of the body 61 in a ynoessg blade 31 intended to co-operate with a corresponding all-round blade (not shown). The material has been removed from the circular perimeter at 62 by making a flat surface 63 adapted at its ends 64 and 65 to the perimeter of the blade.

In the presently preferred form of the invention, the "ties" are not allowed to maintain the increased overall thickness shown in the figure, but are struck down by passing the cut strips between two strapping rolls 15 spaced approximately equal to or slightly less than, or less than, less than the thickness of the metal web before cutting. The bridge 48 is then partially intersected when the adjacent cut strips are brought back from their bonding points to align with each other.

It has been found that in at least some, though not many cases, daughter rollers are formed under good control and without edge overlap, even in the absence of the previously described control arrangements, and thus during maintenance of the coercion effect on the edges of the strips forming the daughter rolls during winding, as mentioned above.

In the special test apparatus illustrated in Figures 13 and 14, a roll 121 (Fig. 13) formed of a 0.38 mm thick steel web is dismantled by passing the web through a guide guide 122, rotating 75 mm longitudinal cutting blades 123, 3C at least one similar to the blade 31 and lowering rollers 124 16 66779 le 125, which is operated by the engine via a suitable reduction gear and clutch. The control lever 127 controls the gear transmission shown to change the pivot position of the eccentric support of the upper blades 123 and thus to adjust the blade gap. Each lower blade 123 is provided with a planar surface 63 shown in Fig. 7 which is 3.2 mm from and to the edge and has a maximum depth (maximum tendon-arc spacing) of 0.15 mm from the circumference of the blade.

The blades 123 may be spaced discs 10, i.e. the actual blades 130, the co-operating pairs of upper and lower blade shafts for cutting metal, and detachments or elastomeric sleeves 131 may be interposed between the blades 130 to push the cut metal away from the cutting edges 15, when the metal leaves the nip.

For manual control of the upper blades 123, arrangements are made to push the cut metal away from the cutting edges as the metal exits the nip, i.e. the blade gap. A crank 132 is provided for manual control of the upper blades 123.

With the dimensions indicated above, the bond obtained on the planar surfaces remains strong enough even after passing through the roll-down rolls of material to be able to roll the cut strips together into corresponding daughter rolls 140 (Fig. 9), which form the parent roll 141.

In the example shown, the two outermost daughter rolls 140a are formed by edge smoothing strips and are therefore considerably narrower than the other daughter rollers.

When the hand lever 127 is moved to lower the upper blades 123, the engagement ceases and the longitudinal section is continuous.

30 The cut strips are still guided precisely when they are rolled into daughter rolls. As soon as slight flutter or slack is observed in one or both of the end rollers or adjacent daughter rollers, the hand lever is moved back to raise the upper blades and re-establish the binding connection. Fluttering or nonsense disappears immediately when the bond forces the cut strips to roll 6 6 7 7 9 together

Cubes 10 and 11 are schematic cross-sections of the cut strips immediately after the knock-down rollers.

Figure 10 shows the binding area, in which the bridges between adjacent strips are shown more or less cut, but not completely separated. Figure 11 shows 5 fully sectioned areas.

Due to the convexity seen in Figures 10 and 11, the outermost daughter rollers, which form the parent roll 141, are rolled on the loose end like the middle daughter rolls. However, because the daughter rollers are forced to roll together, they all have the same number of turns / unit of length. The material connections, i.e. the bonds, between the 10 different daughter rollers are located entirely between the upper and lower surfaces of the metal material. The upper and lower surfaces are not interrupted at the "ties", as would be the case if cutting were interrupted completely at the joining areas. The opposite edges 15 obtained by cutting the adjacent daughter rollers have a continuous edge at the length of these daughter rollers, including their bound portions.

The bonds or joints between the cut strips can be made in such a way as to establish a minimal "forced connection" to make the cut strips rolled together. Thus, when flicker or looseness is observed in one of the daughter rolls in the above 20 examples, the upper blade 123 is not abruptly raised; sufficient to initiate a minimum degree of engagement that is usually too weak both to remain in force after the down rollers and to hold the strips together until they roll on the spindle 123. The hand lever 127 is moved until the engagement is barely strong enough to restore a forced connection that causes the cut strips to roll together. When a forced connection holding these strips together is established, the upper blades may be held in place or, preferably, may be lowered again to repeat the 30 cycles. The counting can take place gradually and can only be continued until slackness or flutter is detected again. Instead of this manual control system, an automatic system can apparently be installed, which in fact "swings" back and forth between two states, one of which is barely able to maintain a forced connection and the other of which is not quite able to do so.

Instead of using the exemplary 0.15 mm deep planar surface, it is contemplated to use planar planes, each with a depth of 0.076, in the upper and lower blades 123 to provide a similar but more symmetrical fit. In this case, the upper and lower blades 123 could be connected to the gears together to maintain the correct alignment of the planar surfaces. The blades 123 are not connected together in the illustrated embodiment.

In order to better control the bond strength as a function of blade shaft adjustment, it is proposed to use non-planar shapes 63. Thus, in Fig. 8, a log-shaped recess 63a is ground with a grinding roller suitable for the blade circumferences, the wing portions being formed of two arcs 20 with a side diameter of about 75 mm. at a distance from each other. The centers and radii of these two arcs are such that they intersect 0.15 mm below the circumference of the blade.

It is more preferable to form two recesses 63a of the same shape in a pair of blades which are allowed to rotate together, the intersection of the arcs of each recess 63 being located 0.076 mm below the circumference of the blade.

Using these shapes, the cross-sectional area of the connecting bridges formed by the recess 63a changes more clearly as the blade spacing changes, allowing for more precise adjustment. With the circumference of both cutter bodies recessed into such a shape that when the blades 123 are brought together, the mirror-image "log wings" of both recesses increasingly overlap to provide a diamond shape of decreasing size, which shape eventually disappears, albeit presumably the disappearance phase is reached.

19 66779

If either upper and lower blades are set at an angle to the other as they rotate together with the recesses in alignment, this setting causes the diagonal "tilt" this tilt can be either S forward or backward depending on the relative direction of the angular advance. The setting of such a relative angle can be performed by any conventional control device which allows a differential angular movement to be achieved between two blades rotating in opposite directions together.

The two blades can be both moved towards and away from each other and set at an angle to each other to obtain different bonding effects.

As the web-15 material to be cut becomes more familiar, the degree of presetting of the binding can be selected.

One feature of the invention is that the cohesiveness between daughter rollers can indeed be varied, from mother roll to mother roll, by adjusting the strength and frequency of the ties, such as by positioning the blade blades to increase or decrease the cross-sectional dimension of the individual ties, and / or adjusting the interlocking frequency.

The device of Fig. 3 can be fitted with a lowering roll 35 together with a similar roll placed below the strips. When using the lowering rollers, it is clear that the roller formed on the mandrel 36 is similar in shape to the roller 141.

Instead of acting as lowering rollers, rollers such as the rolls 124 of Fig. 13 and the rolls 35 of Fig. 3 may be set 30 by suitable spacers or the like (not shown) to cut the strip material thickness or more preferably a little shorter than this thickness and longitudinal cutting blades may be cut 20 6 6 7 7 9 continuously. It has been found that, at least under certain conditions, when the cutting slits pass between the rollers 124 or 35 after they have been formed by the cutting blade, these slits are reassembled to perform non-periodic bonding. In a particular experimental form of the device shown in Figures 13 and 14, a 0.127 mm thick unsealed soft copper web 5 is longitudinally cut and passed between rollers 124 with 0.102 thick spacers (not shown!) Separated by 0.025 mm or 20% to obtain a nominal thinning. The cutting slits are bonded 1Q, i.e. re-joined by "rolling", and the joint feels stronger in the direction of movement than in the transverse direction.The U ^ iel joining is currently not fully understood and may be due to the phenomenon of compression welding or the like and / or longitudinal cross-section. In Fig. 12, the chamfers 15 are schematically shown as small curved lines at the top and bottom of the slits, as seen in Fig. 12, which is a schematic cross-sectional view of a web as non-periodically, i.e. continuously bonded, as just described, or kka if the bellows form part or all of the interconnection, they may occur at locations other than near the extremes of the interface, as recommended and shown. This described operation is non-intermittent because the spacers cannot be changed during cutting.

The connections 25 between the daughter rollers, such as the rollers 140, can be broken either by unwinding the tape or by simultaneously breaking all the connections or ties. In the test apparatus of Figures 13 and 14, the discharge separation can be performed by removing the spindle 125 together with the roll 141 from the winding station, inverting it and placing it in the unloading position instead of the original uncoated spindle 1211, one outermost daughter roll 14Q or 140a if the original roll 121 does not not shown, is passed over a wedge projection 134 mounted on a slide 135 (Fig. 15) resting on the body 136 (Figs. 13 and 15) and through a suitable guide such as 5 lowering rollers (the blades can be moved apart if they are in the way). the ends are taped to the base roll 141. To prevent them from fluttering or swaying, the wedge protrusion 134 may be thinnest on the inside and thickened toward the outside as shown by the conicity of the base of the protrusion shown in Figure 15 to provide good lifting and levering performance. the daughter roll a discharges, the slide 135 allows the protrusion 134 to follow the decreasing circumference. The mother roller 140 is braked slightly to prevent it from over-rotating. The unwinding tape breaks easily and neatly off the emärul-15 child. The next daughter roll can be disassembled in the same way by moving the support on the frame provided with the slot 136 laterally by the width of the daughter roll to get the projection 134 in the transverse direction to the correct position. The bracket is attached to this new location with the mounting screws shown.

The forced connections of the strips during winding, which can be achieved by means of the invention, provide even dividing surfaces between the daughter rolls, despite the almost unbelievable curvature of the web material and the strips cut therefrom. Figures 16 and 17 illustrate very schematically the curvature of the situation as ser-25 pentin, which may be due, for example, to small variations in the feed movement when feeding the web to the cutting blade. In FIG. Fig. 16 shows on a smaller scale the development of the roller 5 shown in Fig. 17, revealing the serpentine nature of the curvature. In this situation, the ends of the mother roll can be very uneven, as shown in Fig. 17, with the dividing surfaces between adjacent daughter rollers still being flat, as shown.

Fig. 17 also shows parts of the broken 10 waste rolls, shown at 34a, which can be used to protect the edges of the mother roll during transport, as mentioned above, and which can be torn off or disassembled by the mother roll either before or by the user. Of these, wreck discs are not explicitly shown in Figure 3 due to this small scale.

The outer ends of the strips of the mother and daughter rollers can be secured against unraveling by taping them to the next round of material. For transport, it may be advisable to belt the mother roll with a belt passing through this heart, e.g., three belts 120 ° apart. Disc-shaped wreck or edge leveling rollers 34a protect the mother roll from belts.

Although the outer surfaces of the edge smoothing rollers may be quite irregular, as shown, the inner dividing surfaces are flat, as also shown in Fig. 17.

It may be noted that when the daughter roll is unwound from the parent roll rather than torn off, the discharge may be arranged to produce a spreading effect so that the trajectory of the separating strip has a vector component along the axis of the roll. Movement along this vector should not be obtained by bending the strip about the axis of the roll, 30. but rather by counteracting reaction forces acting parallel to the axis and the surface of the strip. Extrusion arrangements involving discriminating movement with such a vector component can therefore be very effective. by subjecting the ties to centralized tensile stresses to obtain a good breaking effect. In some cases, this can be achieved by gravity alone, e.g., when the front end of the extreme daughter roll is dropped off the lower end of the parent roll tilted toward the vertical position, so that the start end continues to unload under its own weight. The inventor has terminated in this manner by hand to give a suspended koerullia extremely daughter roll 10 to quickly discharge-falling helix and accumulate on the floor detached from the rest of the strip emärullan remains well visible size and the second extreme subsidiary roller side while maintaining its ground smooth and well-defined.

Figure 18 shows a device for final cutting. Here, the daughter roll 88 is unwound 15 from its mother roll 89, the unwound strip being indicated by reference numeral 90. In this case, the device is provided with a separating or levering blade 91, most clearly shown in Figs. 19 and 20, to assist in separating the daughter roll ribbon. the disassembled belt 90 slides and under which the unassembled belt turns of the 20 daughter rolls 88 go. The disassembled strip 90 slides on the upper surface 93 of the protrusion 92.

The protrusion 92 is supported on the flange 97 by a pivot pin 94 provided with a spring 95 resiliently adapted to center the protrusion 92 in the described horizontal position. The flange 97 projects from a crosshead 98 which slides vertically on four guides (two of which are shown) extending upwardly from two spaced apart bases (one of which is shown). Lifting and lowering are performed by a drive cylinder 96. The underside of the protrusion 92 may slide on the unassembled portion of the daughter roller 88.

The leading edge of the separating blade 91 may, as shown, extend somewhat below the upper surface 93 of the protrusion 92, so that the blade partially protrudes into the cutting line associated with the next turn of the daughter roll prior to the actual unwinding turn to initiate or at least help keep the separating blade 91 unwinding. in the immediate vicinity of the edge of the layer 5, which corresponds to the layer of the daughter roll which then discharges. In some cases, this initial initiation of the cut or maintenance of the position is unnecessary, in which case the hanging part of the blade 91 can be omitted.

The function of the levering *, i.e. the separating blade 91, is to wedge or clear the uppermost turn 1Q of the daughter roll to be unloaded from the corresponding turn of the still complete, i.e. unloaded, roll laterally long enough to break the connection between them. As was well apparent from the above description, the effect may be more wedged or leverage than shear.

It is to be understood that various combinations of partial slitting and separation embodiments may be utilized in accordance with the present invention. For example, when the partial longitudinal cutting has been performed by one of the many methods described above, the cutting can be completed by any of the methods described above at any time after the start of the re-rolling.

In another aspect of the invention, the final separation can be performed during rewinding. As shown in Fig. 21, one possible method of completing the cutting in the cutter 30 is to use a bending bar 38 which rests on the interconnected strips 32 just as they approach the second turn of the roll to be formed on the rewind spindle 36. Due to the greater thickness at the joints, i.e. the ties, the pressure of the rod 38 resting on the strips breaks the bond still existing between the adjacent strips and completes the cutting just before the strips go into the second round of the roll.

25 6 6 7 7 9

The roller crossing of the rod 38 and the roller is preferably arranged with endless belts 39 to prevent scratching or other damage to the surfaces of the rolled belts, these belts may be freewheeled or driven by pulleys 40 which in turn are driven by 5 gears 41 racked with similar teeth on the shaft of the lower blades.

Alternatively, as shown in Figure 22, instead of a forming bar 38, a roll 43 may be used to complete the cutting of the strips on the roll forming them. In this case, a segment roll 43 with relatively large diameter portions 44 in contact with the longitudinal edges of the strips and smaller diameter portions 45 between the larger diameter portions 44 can be used.

In one alternative, the sharpened rotating blades used by the motors (not shown) can simply be placed on the rewind spindle to complete the cuts between adjacent strips 32 once the strips have begun to roll on the spindle. The unbreakable areas between adjacent strips can, of course, be - especially when the material to be cut is somewhat brittle - broken by simply adjusting the rewinding tension, i.e. the tension.

The narrowness of the longitudinal cutting line made possible by the partial longitudinal cutting methods of the present invention allows special longitudinal cutting and separation mechanisms to be included in the partial cutting system. Thus, as shown in Figure 23 of the drawings, the web 16 is unwound from the roll on the spindle 18 25 and passed through the cutting station 80 before being rewound on the spindle 49. The cutting station 50 has opposite pairs of blades 52 and 54 positioned above and below the web in the same manner as the opposite blades 31.

However, the blade 54 includes at its periphery located satellliittiterä 56, which is spring-loaded radially-outwardly from the blade 54. The spindle 49 is mounted for movement in the direction of arrow 58 so that the relative positions of the blade 54 and the mandrel roll to be formed close to the surface 26 is maintained during the 66779 uudelleenrullauksen. Thus, as the web 16 passes between the blades 52 and 54, it is cut into a plurality of strips except in areas where the spring-loaded satellite blade 56 contacts the web 16.

The compression of the spring 60 is selected such that it 5 is unable to force the blade 56 completely through the web 16 as it passes between the blades 52 and 54. But when the partially cut areas thus obtained come into contact with the satellite blade 56 again, they are weak enough so that the satellite blade 56 can complement the cut started at the station 50. Since the distance between the partially cut areas provided by the satell-10 connector blade 56 is a function of the diameter of the blade 54, automatic synchronization occurs that allows the partially cut areas to be positioned exactly on the roll formed by the satellite blades when rewinding of the strips has begun.

Claims (3)

66779 A rotary cutting blade unit (31 or 123) having cooperating cutting blades for continuously cutting an elongate metal sheet-5 material web (16) along a cutting line (34) such that the web is completely separated along a portion of the cutting line and spaced apart along the cutting line the web is cut only a portion of its thickness so that the material 10 on opposite sides of the cutting line is joined by fasteners formed by the partially cut web material, the rotating cutting blade unit generally comprising a circular cutting blade body (61) adapted to be rotatable, the cutting blade body (61) 62) 15 defining a cutting blade having a cooperating cutting blade and a formation (63, 63a) arranged circumferentially on the outer circumference (62) of the cutting blade body (61), characterized in that the radial depth of the formation (63, 63a) is such that its edges are cut-20 edges that coincide with the cut a fringe edge (64, 65) surrounding the rest of the outer circumference (62) of the cutting blade body (61) to form a continuous uninterrupted cutting edge that continuously penetrates the web material from each continuous rotation of the cutting blade body (61). A rotary cutting blade unit according to claim 1, characterized in that the formation (63) is a prestressed plateau. A rotary cutting blade unit according to claim 1, characterized in that the formation (63a) 3. is a radial recess in a plane perpendicular to the axis of the cutting blade body (61), the recess having converging curved sides terminating approximately at the center of the recess.