DD155302A5 - METHOD AND DEVICE FOR REMOVING A STRIP FROM A METAL PLATE WRAPPING BODY - Google Patents

Abstract

The invention relates to a method and a device for removing a metal strip from a winding body, which consists of several, separated by perforated lines strip. The aim is to separate without damaging the edges of the strips. For this purpose, the dividing lines are exposed to sufficiently large traction forces. According to the invention, the respective outer strip with the edge, which lies opposite the parting line, is deflected out of the plane of the winding body. The device consists essentially of a deflection device which has a finger-shaped body or a rotatable disk. This deflector engages the edge of the strip opposite the parting line. The invention may be used in sheet metal processing shops, e.g. Stanzereien, are used.

Description

-1- 222510

Berlin, September 24, 1980 AP B 21 C / 222 510 57 799/26

Method and device for detaching a strip from a wound body

Application area of the invention

The invention relates to a method and an apparatus for detaching a strip from a winding body made of sheet metal, and it can be used, for example, in stamping technology, where individual metal strips are needed.

Characteristics of .., ^ bej Nnten technical solutions

In this improved mode of operation, an elongate sheet metal sheet is slit along parallel lines to form parting lines which intermittently spaced remnants of material or bridges of only partially separated Have materials that bridge the 'dividing line between adjacent strips and connect the facing edges of adjacent sheet metal strips together. If such a slotted wound body is reeled, then a wound body results from a plurality of wound-up individual strips, which are connected to one another by means of destructible connections or metal bridges which are formed by the above-mentioned partially slotted or separated metal remainders.

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Bobbins made in this manner are comparatively easy to ship and handle, since it is not necessary to join the individual wound metal strips together, as is usual, and there is no longer the risk of damaging or impairing the edges of the wound single sheet metal strips because only the two external wound single strips with their outer edges are subject to damage

The detachment of the Einglstreifen from the bobbin can be performed using special separators v / earth, which separate a wound single strip from the winding body by simultaneously breaking the connecting material bridges. "Such a device is described in US-PS 4,155,238. There are also cases where it is desirable to peel off the individual strips from the former, for example while the package is being rotated, so that the singulated strip can be fed to a processing station such as a press, a punch or the like. In US-PS 4,155,238 a cutting tool (prizing blade) is shown and described, by means of which individual strips are released from the winding body in that the connecting bridges are severed when removing the ^ zelstreifens from the winding body. The cutting knife is aligned with the dividing line containing the metal bridges to be destroyed and destroys the connecting bridges successively by impact, while the winding body is set in rotation and the pulp strip is pulled away from it,

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The detachment of individual strips in this way has been considered to be unsuitable in practice, especially when a comparatively thin sheet metal material is to be handled. 3 This is due to the fact that bending forces arise in the impact stress exerted on the connecting bridges for their destruction, resulting in a fault lead the adjacent strip material or otherwise affect the strip material, so that its optimal utilization is questioned »

In US-PS 4,155,238 a further embodiment of a strip separating tool is described, by means of which the connecting bridges are separated by the strip-wound body to be singled is guided over a wedge-shaped cutting knife, which lifts the strip to be separated relative to the neighboring strip In operation, however, such tools result in an upward force vector on the respective connecting bridge which, as the adjacent strip wraps and metal bridges move, causes a force system to torsionally load the connecting bridges go break lets β ^'ß ieser torsion fracture leads to a so-called "cup and point residue" which for this Βχ-uchtyp characteristic "is the fraction residues formed appear at the isolated strip material as ridges, which die'Qualität the material drastically belittled

Aim of the invention:

The aim of the invention is a method and an apparatus for detaching a strip from a winding body, wherein

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a quality impairing influence on the strips, eg _e is avoided by impact or torsional effects when separating the material bridges located between the strips ,,

Presentation of the Invention

The invention has for its object to provide a method and apparatus for detaching individual strips from a winding body, wherein the individual ^s treifen are held together by perforated dividing lines to provide, in which a loading of the material bridges in the dividing lines by tensile forces, whereby a clean Material separation is achieved *

According to the invention, a process is provided for strip separation from a sheet-web winding body, in which adjacent strips are interconnected by means of breakable material bridges, which are arranged intermittently along the dividing line between the facing edges of the adjacent strips. This method comprises turning the winding body into strips «Abhaspelrichtung and leading out of the bobbin level of that edge of the strip to be separated, which is opposite to containing the material bridges to be destroyed edge to apply to the strip material an internal stress of each of the successive material bridges with a reaction force of sufficient size for Breakage of the material bridge in question is encountered «

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In this case, the edge of the strip is raised to deflect radially relative to the winding body, this is a body, for. B, a finger-like body, is inserted between the corresponding edge of the strip and the edge of the underlying winding. This body is fixed with respect to the movement of the coil body, in sliding contact with the strip and the following winding "The body is guided in a direction that essentially coincides with the direction of movement of the strip

The invention further provides an apparatus, comprising the following essential components ι a group consisting of a metal sheet wrapping body having a plurality of laterally spaced, extending in the longitudinal direction (the metal sheet) separation lines, which are arranged a plurality of laterally adjacent to each other and spaced si ^ treifenwickelkörpern define said strip wound bodies being joined together laterally by intermittently spaced metal bridges bridging the dividing line between adjacent strips; and means for detaching or separating a strip wound body from the primary coil body by breaking successive connecting bridges along the length of an affected dividing line, said device comprising a device , With the aid of which the entire bobbin can be rotated in Abhaspelrichtung, Further, a deflection device is provided to that edge, the to devise a singular strip opposite to that which contains the connecting bridges, along a trajectory which lies outside the trajectory passing through the interconnecting bridges »

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The deflecting device has a finger-like body, which engages between the outermost ^w ent of the strip and the next lower winding, it extends to the vertical and horizontal stripes having a front part, which is only slightly positioned within the edge of the edge opposite liegte with the corresponding separation line

The finger-like body has an edge opposite to the direction of rotation of the bead-body. The edge is formed as inclined - "bene",

The deflection device may have a disc which is rotatable about a ickelkörpers perpendicular to the axis of rotation of ^ A _c HSE and which is inserted between the outer and the next lower winding so that they only slightly, inwardly extending from that edge instead of the finger-like body , which the edge with the ent. The peripheral edge of the disk is made up of converging surfaces «

AusführungsbeisOiel

The invention will be explained in more detail below with reference to an embodiment ", in the accompanying drawings show:

Fig. 1 is a view of a separating device according to the invention; · ·. ,

Fig. 2 is a side view of the device shown in Fig _e 1;

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Pig. Figure 3 is a detail view of the singulation device on a somewhat enlarged scale;

i'ig. 4 is a section taken along the line 4-4 in Fig. '. 3;

5 is a partial perspective view of the pig. 1 illustrated device;

Pig. 6 is a section along the line 6-6 in ig. 5;

Pig. 7 shows a further embodiment of the separating device according to the invention and

Pig. 8 is a top view of the ones in Pig. 7 illustrated further embodiment _e

The pig. 1 and 2 show a stripping assembly 10 for stripping individual strips 12 from a winding body 14, made of BIeCh ₃ ,. which is rotatably arranged in a Abhaspeieinrichtung 16 »The winding body 14 is of the type described in US-PS 4,155,238 and consists of a wound-up sheet metal web, which a variety ago. has side by side spaced apart dividing lines 18 in their OberfLache, which define between themselves releasably connected to the wound bodies 14 wound up strips. As shown in Pig "3, the parting lines 18 contain intermittently spaced-apart bridges of material 20c These consist of partially severed stehengebliebenem ^ leak sheeting and bridging locally the spacing between adjacent ^s treifen 12" -The winding body 14 is, as shown in detail in US-PS

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No. 4,155,238, having been produced by means of rotating slitting knives which act on an elongate sheet of metal sheet along the parting lines 18 so as to slit the sheet continuously. Over the major part of the longitudinal dimension of each parting line 18, the slitting operation takes place to the extent that that the track is actually cut. Intermittently, however, the slitting of the sheet metal web is briefly reduced below the dividing lines 18, which would be required for a severing of the metal sheet, so that the material bridges 20 are formed v / ground, which are only partially slotted and adjacent strips 12 connect together * Trennlinien 18.und Mater! Albrücken 20 provided sheet metal web is reeled with a reel to a winding body 14, which may have several hundred windings »After the reeling of the bobbin 14 is removed ready for shipment from the reel The shipping this bobbin 14 can either over long distances by different means of transport or to more distant locations within the generator operation take place on the _e usage · site of the wound body is inserted into a Abhaspeleinrichtung 16 14, wherein such Abhaspeieinrichtung a rotatable ^ upport 22 for receiving the Mi Ttelöffnung 23 of the bobbin 14 has «

A deflection device 24 serves to cut through the successive material bridges 20 which connect the strip 12 to be detached with the remaining strip element 14, whereby the cutting through of the material bridges 20 takes place.

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follows while the bobbin 14 is rotated in the Abhaspeieinrichtung 16 in Abhaspelrichtung. The device 24 has a finger-like body 26 which is fixed at one end to an adjustable support sleeve 28 which is adjustable and lockable on an elongated rod 30. The rod 30 is in turn pivotally mounted on a base plate 32, so that the finger-like body 26 can be positioned to the winding body 14.

As can be seen in particular from FIGS. 3 and 4, the finger-like body 26 preferably has a knife-like or blade-like shape, wherein a converging edge 34 is arranged opposite to the direction of rotation of the winding body 14. Starting from the edge 34 of the finger-like body 26 is provided with an inclined plane 36, which leads to a support surface 38, over which the strip ³ to be separated ³ runs during its donning from the winding body 14 away. The apparatus shown in Fig. 4 is eite to that of ^D that the ^ shown in I ¹ Ig ₆ 3 eite opposite, identical, a ^ end to allow the cutting tool, if a wound body must be unwound in a direction I4 which the winding direction described above is opposite.

The finger-like body 26 is fixed to a fork-like knife holder 40 with pins of bolts 42 'extending through holes 44 formed in the finger-like body 26. The knife holder 40 has a threaded shank 46 which is adapted to extend through a pierced support block 48 which is welded to the support sleeve 28 - a nut 50 connects

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the holder 40 with the support block 48. - ^ he support sleeve 28 is slidably mounted on the ° tab 30 and is secured in a desired position along this ^ tabes 30 by means of a hand-operated adjustment screw 52 »

The tab 30 is pivotally mounted with its lower edge on the stationary base plate 32, which has at a distance spaced apart upstanding end plates 56, between which an elongate tab 58 is received _e V / ie in the 3 ig. 1, the lower end of the rod 30 is provided with an integrally formed bearing shell 60, which is received on the "tab 58 and can pivot therein." The rod 58 also carries a locking device consisting of spaced-apart end plates 64, which by means of a bottom bracket 66. This locking device is slidable on the rod 58 and allows adjustment of the finger-like body 26 in a direction parallel to the axis of the winding body 14. A manual adjusting screw 68, which is similar to the adjusting screw 52, extends through one of the end plates 64 to determine the locking means in the respective selected positions along the tab 58.

The device described above operates as follows: After the bobbin 14 has been installed in the Abhaspeieinrichtung 16 that the unwinding can take place, the rod 30 is positioned along the rod 58 that the front part 39 of the finger-like body 26 to the parting line 18th is aligned, which contains the material bridges .20, which connect the strip to be separated 12 with the rest of the bobbin 14. The tab 30 then becomes

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verschv in its active position / enkt in which the finger-like body 26 rests on the surface of the next lower ^w ent. Good results would be obtained if the front portion 39 of the finger-like body 26 extends inwardly from the outside edge of the strip about one quarter of the width of the strip.

If the strip 12 is pulled off, then its outer edge slides over the support surface 38 of the fingerart.igen body. Thereby, the outer edge of the gripper 12 is deflected radially upwards out of the circular path so as to be traversed by the opposite edge of the strip 12 and the adjacent edge of the adjacent strip 12 '. The lifting of the edge of the strip 12 achieved in this way serves for a short-term elastic deformation of the strip material, as a result of which internal tensile stresses are generated in the material which are distributed over the material plane between two material bridges 20 arranged in succession. If the material is subjected to such tensile stresses, it follows that. the reaction forces concentrate on the material bridges 20. These reaction forces pass through their maximum at each of the successive bridges of material 20, just after they pass the front part 39 of the finger-like body 26, and occur primarily as axial tractive forces which are in the. Designated by the numeral 3 R. are _o - ^ ine considerably smaller component Ry of this force is a third longitudinally of the strip material _"? however, practically negligible reaction force occurs normally to the axial force and the longitudinal force. The resultant of these forces becomes the

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Material bridge 20 so heavily loaded that it breaks.

The process is repeated for each subsequent bridge of material 20 by the strip 12 passes over the finger-like body 26 in order to break this V / else the material bridges 20 successively .and to this ^w ay a complete detachment of the wound single ^ treifens .12 from to reach the entire bobbin 14 »

_S are desired after separating a first strip 12 of the adjacent strips -J2 ^f from the winding body 14 separated as the ^ along the rod 58 is distribution of the ^s tabes 30 is set so that the front part 39 of the finger-like body 26 in the region of the next irish line 18 to lie comes, then the finger-like body 26 on the next lower winding of the strip 12 'comes to rest and the process is repeated,

In the Pig "7 and 8, a slightly modified A _us guide of the invention is shown" In this embodiment, the deflecting device works 24 'in substantially the same manner as the finger-like body 26 of the deflection device 24', the deflection device 24 is ^f as a rotatable disk 70 In the illustration of the second embodiment of the present invention, parts corresponding to corresponding parts of the first embodiment are denoted by identical reference numerals 70 has a circular shape and a peripheral edge 72, the converging surfaces 74 and 76th

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is formed. The disc 70 is mounted between split segments 78 and 80 of a support member which is rotatably mounted on a pin 82, which is pivotally mounted on the displaceable support sleeve 28 on the tab 30.

As in ^ ig. 7, the pin 82 is formed as part of a cylindrical body 84 which is disposed between a comparatively larger diameter base portion and an axially outer threaded portion 88. The aforesaid base portion forms a shoulder 86 for receiving the segment 78 _β Outerwinding section 88, a nut 90 is screwed to secure the disc 70 between the segments 78 and 80. The end of the cylindrical body 84 opposite the threaded section 88 is provided with a clevis 92 pivotable by means of a s-finger 94 Arm 96 is connected, which extends from the support sleeve 28, starting radially.

The segment 78 may be provided with a bush 98 of bronze or the like, as shown in the drawing, to facilitate rotation of the disc 70 about the pin 82.

The operation of the above ^A usführungsformen of the invention corresponds in all material respects to the operation of the ^A described above usführungsform match, the pivot rod 30 is positioned so that the disc 70 rests on the winding which is located below the to be removed winding, with the Peripheral edge 72 only slightly from

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of that edge of the strip 12 extends inwardly towards the opposite edge which houses the material bridges 20. As the strip 12 to be singulated passes over the surface 74 of the disc 70, the resulting deflection creates a tensile stress on each material bridge 20 _s which destroys it.

The above-described method of breaking the material bridges 20 connecting adjacent strips 12, 12 'in a former 14, allows them to be broken by applying tensile stress to them, whereas the prior art is capable of damaging such material bridges by impact by means of a Abschermessers or by applying a '^ ^ orsionsbeanspruchung means of a corresponding race tool provides _β

When using the method according to the invention, the material bridges 20 are not subjected to forces which result in a bending stress, so that the adjacent strip material is not impaired or damaged by such bending forces _e

Claims (6)

1b
2 2 2 5 10 -V 24.9.1980 AP B 21 C / 222 510 57 799/26 invention claim 1. A method for detaching a treifens from a consisting of a metal sheet web winding body, which consists of juxtaposed and by means of destructible material bridges interconnected wound strips, wherein the material bridges at intervals along the dividing line between the facing edges of adjacent strips are formed, with rotation the ^w ickelkörpers in its Abhaspelrichtung, characterized in that that edge of the strip (12) which is to be destroyed material bridges (20) opposite edge having, is deflected out of the ^ plane of the winding body (14), (in the strip 12 ) internal stresses are generated, which encounter in each of the successive material bridges (20) reaction forces that are sufficiently large to destroy the respective material bridge (20), 2, method according to item 1, characterized in that the edge of the ^s treifens (12) for - ^ uslenkung radially relative to the winding body (14) is lifted " Method according to item 2, characterized in that the edge of the strip (12) is raised by inserting a body, eg a finger-like body (26), between this edge and the edge of the next lower winding , 222 510 - «- 24.9.1930 AP B 21 C / 222 510 57 799/26 4. ^ experience according to item 3, characterized in that the body is fixed with respect to the movement of the winding body (14), wherein he was in sliding contact with the tread (12) and the next lower winding 5 _β method according to item 3, characterized in that the body is moved into a seal substantially coinciding with the direction of movement of the strip (12) * 6. Apparatus for carrying out the method according to the items 1 to 5 for detaching a strip from a consisting of a sheet metal web winding body having a plurality of juxtaposed at a distance, extending in the metal web longitudinal direction separating lines, which a plurality of side by side in ^A define spaced coiled strips, these strips being laterally connected by means of spaced material bridges bridging the dividing line between adjacent strips, and means for rotating the coil in its uncoiling direction and detaching a strip from the coil body by successive means Breaking the material bridges along the length of an affected 'i -'rennlinie, characterized in that a deflection device (24) at that edge of the. Strip (12) which lies opposite that edge which has the material bridges (20), the deflection device (24) following a path of movement which lies outside the movement path on which the material bridges (20) move » 222 510 Device according to item 6, characterized in that the -ae-deflection device (24) has a finger-like body (26) which engages between the outermost winding of the strip (12) and the next lower winding while being transverse to the strip ( 12) and has a front part (39) which is positioned approximately within that edge which lies opposite that edge which has the corresponding parting line (19). 8. Device according to point 7, characterized in that the finger-like body (26) has an edge (34) which is opposite to the direction of rotation of the winding body (14), and in that this edge (34) is inclined as a plane (36 ) is trained. Device according to item 6, characterized in that the deflection device (24 ') has a substantially circular disk (70) which is rotatable about an axis perpendicular to the axis of rotation of the winding body (14) and between the outermost one of the strip (12) and the next lower winding is insertable, wherein the Unifangskante (72) of this disc (70) extends in the transverse direction to the strip (14) only slightly inwardly from the edge which lies opposite the edge, which is the corresponding Dividing line (18). 10. Device according to item 9, characterized in that the peripheral edge (72) of the disc (70) of converging surfaces (74, 76) is formed. For this 4 pages drawings