EP1761348A1

EP1761348A1 - Drawing machine and method for drawing an elongated workpiece

Info

Publication number: EP1761348A1
Application number: EP05766208A
Authority: EP
Inventors: Dirk Hessberger; Thomas Cmiel; Heiner Kudrus
Original assignee: Schumag AG
Current assignee: SMS Group GmbH
Priority date: 2004-06-30
Filing date: 2005-06-28
Publication date: 2007-03-14
Also published as: WO2006002613A1; DE112005001503A5; US7937980B2; DE102004031843A1; CN101014426A; US20070245795A1

Abstract

The invention relates to a method for drawing an elongated workpiece (2). According to said method, the drawing forces required for the drawing process are exerted by means of at least one sprocket chain (13) that comprises at least one flat link, said drawing forces being introduced by the drawing tool via the flat links into the sprocket chain (13). This permits the latter to have a lighter construction and to exert greater drawing forces.

Description

Drawing machine and method for drawing an elongate workpiece

[01] The invention relates to a drawing machine for drawing an elongate workpiece with at least one articulated chain bearing chain elements connected by chain links, wherein the chain links comprise on one side the chain elements and on the other hand the chain elements hingedly connecting links and at least one pulling tool with directly corresponds to a link. The invention also relates to a method for drawing a lengthened workpiece by means of at least one draw chain-bearing link chain of chain links connected chain elements, the chain links on the one hand the chain elements and on the other hand the chain elements hingedly connecting links comprise, pulling forces of a pulling tool directly into at least one corresponding Conduit are routed.

[02] Such apparatus and methods for drawing an elongate workpiece are well known in the art. By way of example, DE 101 22 340 A1 discloses a chain drawing machine for the continuous drawing of drawn material, in particular rod-shaped or pipe-shaped drawing stock, in which clamping jaws which clamp the drawn stock during the drawing operation are arranged on a toothed chain. Each toothed chain in this case comprises tabs which extend in the direction of rotation of the toothed chain, and bolt-like connecting elements arranged transversely to the direction of rotation of the toothed chain, by means of which tabs arranged essentially one behind the other in the direction of rotation are connected to one another.

[03] The jaws are attached to the bolt-like connecting elements. To fix the clamping jaws on the toothed chain, the clamping jaws have bores transversely to the direction of rotation of the toothed chain, through which the bolt-like connecting elements are inserted, so that each clamping block is fastened directly to at least one bolt-like connecting element. Indirectly, each clamping jaw is also in operative connection with the other bolt-like connecting elements via the toothed chain. As can be seen in FIGS. 3 and 4 of DE 101 22 340 A1, the clamping jaw in the drawing chain shown there is in contact immediately on both sides with the bolt-like connecting elements, so that in this arrangement each clamping jaw or each pulling tool with two connecting elements is located directly in the Contact stands. With the remaining links is a respective Zieh¬ tool only on the chain so only indirectly, that is on the links, with in which the respective pulling tool is in direct contact, or via the chain link comprising this connecting link, in contact.

[04] The toothed chain constructed in this way is driven by deflection wheels having teeth, the teeth of which interact in the usual way with the tooth-like lugs of the toothed chains.

[05] A corresponding drawing machine is also known from DE 198 57 781, wherein in this drawing machine a block link chain, the blocks of which carry the drawing tools, is used. In this arrangement, the blocks are arranged centrally on connecting bolts on which the lugs are then fastened on the outside. In the center of the blocks, these each have a cavity, which provides space for pressure rollers, which are also arranged on the connecting pin. A completely different drawing machine disclosed in DE 148 593 B, in which the contact forces are not applied via a frame but perpendicular to the orbit of the chain of the chain itself by each chain member carries a spring-wedge element which generates clamping forces in an upstream chain link ,

[06] The present invention is based on the object of further developing known drawing machines or drawing methods so that, with essentially the same dimensioning of a drawing chain, substantially improved drawing performances or a similar drawing performance are achieved with a smaller dimensioning of the drawing chain.

[07] The object of the invention is achieved by a drawing machine for drawing an elongated workpiece with at least one articulation chain bearing articulated chain elements connected by chain links, wherein the chain links comprise, on the one hand, the chain elements and, on the other hand, the chain elements articulated connecting links and at least a drawing tool corresponds directly to a connecting member, and which is distinguished by the fact that the drawing tool has at least two connecting pins (286, 480) with each connecting member (231, 416) with which the drawing tool is directly in contact. 481, 486, 487, 488), between which at least one connecting pin (287, 482, 483) of a second chain element is arranged, is in contact.

[08] In particular, exactly one connecting pin of the second chain element can be arranged between the at least two connecting pins. In this way, a particularly uniform force distribution can be ensured with the advantages explained below. [09] The object of the invention is also achieved by a method for drawing an elongate workpiece by means of at least one articulated chain carrying chain links connected by chain links, wherein the chain links comprise, on the one hand, the chain elements and, on the other hand, the chain elements articulated connecting links, wherein pulling forces from a pulling Tool are passed directly into at least one corresponding connecting member, and the pulling forces of the drawing tool in each of the corresponding with the drawing Verbindungs¬ members via at least two connection points, between which at least one connection point of a not directly connected to the pulling tool chain element is initiated become.

By means of such a drawing machine or by this method, an advantageous force splitting takes place at several connection points in the interface area "drawing tool / connecting link", whereby the machining forces are divided by the drawing tool into the connecting link of the articulated chain when pulling a workpiece In particular, the connecting members can be formed smaller at the same pulling forces or higher pulling forces can be realized with the same number of connecting forces.

Advantageously, machining forces to be absorbed during pulling, in particular shearing forces occurring in this context, which act directly on the connecting members by the drawing tools, are greatly reduced by the provision of at least two connecting pins between the pulling tool and a connecting member corresponding therewith. As a result, on the one hand, with a constant component strength, higher machining forces and, concomitantly, higher machining speeds are achieved. On the other hand, the component groups of the present drawing machine are dimensioned smaller while maintaining the same performance. By providing the at least two connecting pins, advantageously at least two, preferably more, connection points are provided between the drawing tool and the connecting member corresponding thereto, whereby a substantially better, more uniform force flow is achieved between the drawing tool and the connecting member.

[12] For the purposes of the present invention, the term "link chain" is understood to mean any chain which essentially consists of chain elements connected via chain links.

[13] The chain elements connect the chain links, which give their mobility to the chain, as relatively rigid components. Here, several modules together

Form chain element or a plurality of modules be part of a chain link, so that the concept of chain elements arranged abstractly behind one another, via joint connections miteinan- the connected assemblies and the concept of chain joints describe any kind of articulated connection between two relatively rigid assemblies, regardless of the number of further assemblies involved in this. Thus, while a joint chain is formed essentially linear and is often self-contained, it has degrees of freedom perpendicular to this linear formation direction at the level of the chain links, which ensure and also limit the mobility of the joint chain. Each chain element can preferably consist of a plurality of straps and / or of a block, wherein in the present context components or assemblies of a chain element whose thickness, preferably their width, do not vary by a factor "two", are referred to as tabs a chain element necessarily only one block, because if two blocks were to be found in parallel in a chain element, these tabs. Depending on the embodiment, one speaks in the present case of block chains, if there are only blocks, of link chains, if only tabs are present, and of block link chains when tabs are mixed with blocks.

[14] Accordingly, a chain joint comprises on the one hand at least two chain elements or assemblies thereof to be connected to one another, so that these chain elements form at least part of the chain link. On the other hand, a chain link comprises at least one connecting link, which articulates the at least two chain elements to be connected to one another. The connecting member thus realizes this connection with the degrees of freedom which are predetermined by the type of chain link.

[15] Connecting members accordingly connect individual chain elements in pairs. In this case, the connecting links preferably extend essentially transversely to the direction of rotation of the articulated chain and are often designed in the manner of a bolt. For the purposes of the invention, it does not matter in particular whether a connecting member consists of a single component or of a plurality of components, that is to say of a component group, such as, for example, individual connecting member elements of a connecting member.

It is understood that a plurality of assemblies of a chain element can be arranged parallel to each other and connected by one or more connecting members with another chain element or with the Bau¬ groups of another chain element.

[17] In the present context, the strength of a chain element or assembly hier¬ of this as extension of the chain element is defined perpendicular to a connecting line between the two chain joints of the chain element. If the two chain joints are configured in such a way that they only provide one degree of freedom in one joint plane, similar to a knee joint, and that these two joint planes coincide, the width becomes in the present context a chain element or an assembly thereof defined as the strength of the chain element or this assembly perpendicular to these joint planes. In a self-contained chain, which has only the aforementioned chain joints, then results in a plane to which the entire chain arranged in parallel or in which the entire chain is arranged. The width of the chain elements or the assembly is then defined as the thickness of the chain links perpendicular to this last-mentioned plane.

[18] In addition, independently of the aforementioned solution, the object of the invention is achieved by a drawing machine which has at least one lug chain comprising gripping chains carrying drawing tools, in which the articulated chain has chain elements connected to one another via chain links, wherein the link chain Chain joints each comprise two connecting elements connecting chain elements and the drawing tools are attached to the tabs. In this case, forces from the drawing tools via the lugs act on the connecting links of the articulated chain, with the lashing ends assigned to each of the connecting links correspondingly being able to be referred to as connecting lugs. Thus, the forces are introduced into the connecting member at at least two connecting points, since the pulling tool is arranged on at least two mutually spaced tongues running parallel to each other, and thus to ensure a uniformly distributed introduction of force from the drawing tool into the articulated chain.

[19] Accordingly, the object of the invention is also achieved, independent of the abovementioned solutions, by a method in which pulling forces required for pulling are applied by means of at least one flaps and the pulling forces from the workpiece over the flaps into the Articulated chain are introduced.

[20] The object of the invention is furthermore solved, independently of the abovementioned solutions, by a drawing machine having at least one block of articulated chain which has chain elements interconnected by chain links, wherein the chain links each comprise two connecting links connecting two chain elements and each block of a chain element has, for each of its connecting links, at least two juxtaposed and spaced connection pins, between which at least one connecting pin of an adjacent chain element is arranged.

[21] Due to the adjoining and spaced connecting pins or corresponding connection points between the blocks and connecting members corresponding to the blocks, pulling forces are introduced into the connecting members several times distributed over the blocks, whereby the above-mentioned advantages are achieved also with regard to the link chain comprising the blocks.

[22] Regardless of the above features, this object is also achieved by a drawing machine for drawing an elongate workpiece with at least one drawing tools bearing articulated chain connected via chain links chain elements, in which the chain links on the one hand, the chain elements and on the other hand, the chain elements articulated connecting links include which at least one pulling tool is attached to a chain link, which at least one Reibschlusseinrichtung for frictional connection between the link chain and the workpiece and pressing means for applying a required for the frictional connection, applied by a frame contact pressure, wherein the pressing force acts directly on the chain link, and which It is characterized in that the drawing tool is in contact with at least two connecting pins with each connecting link, with which the drawing tool is in direct contact.

[23] Likewise, the object is achieved cumulatively or alternatively by a method for drawing a lengthy workpiece by means of at least one articulated chain bearing chain links connected by chain links, in which the chain links comprise on the one hand the chain elements and on the other hand the chain elements hingedly connecting links, the pulling forces are directed by a toeing tool directly into at least one corresponding connecting member, the workpiece is frictionally engaged by the articulated chain, and contact forces required for the frictional connection are applied by a frame and the contact force acts directly on the chain member, the pulling forces of the drawing tool are introduced into each of the connecting members which correspond with the drawing tool via at least two connecting points.

[24] In this context, the term "direct" refers to the fact that the contact pressure, which is finally applied to the workpiece by the chain, bypassing other components of the chain, in particular bypassing the links, to the corresponding In this way, the number of highly loaded subassemblies is minimized, so that the number of highly stable subassemblies can be minimized.

Such an arrangement and such a method differ fundamentally from an arrangement according to DE 198 57 781 A1 already according to its type, since there the contact forces are transmitted via the connecting links into the chain and to the drawing tools, so that the Verbin¬ ment links subject to a double burden and already for this reason have to be made much stronger and more voluminous than this in the aforementioned arrangement or in the above mentioned procedure needs to be the case. Also, this arrangement and this Ver¬ drive fundamentally different from DE 148 593 B, since there the contact forces are applied by the chain itself.

The present invention is thus based on the basic knowledge that advantageously the drawing tool, which is attached to a chain of a drawing machine, the pulling forces are introduced into the chain so that the chain joints are not burdened unnecessarily singular. As a result, present invention is distinguished in particular from DE 101 22 340 A1, but also from other prior art, in which the force is generally applied to a connecting bolt via a bore or via an opening provided on a journal is, so that caused by the two edges of the openings of these pins or by the edges of the holes shearing, where very high shear forces occur, which must be countered by the choice of very strong bolts. This is different in the present invention, according to which the drawing forces are introduced via a large number of connection points, tabs or connecting pins on the connecting links of the chain links or in the chain einge¬. Here, the forces are distributed much more uniformly, wherein the distribution of force can be selected in particular by the number of connection points, tabs or connecting pin of a chain element.

[27] In addition, the object of the invention, regardless of the aforementioned solutions, solved by a drawing machine, the at least one lashing comprehensive link chain, at least one Reib¬ closing device for frictional connection between the link chain and workpiece and Anpress- means for applying a for the Frictional connection having required contact pressure, wherein at least two tabs of a chain element or two overlapping tabs of adjacent Ketten¬ elements have contact surfaces on its side facing away from the workpiece. Advantageously, this makes it possible to apply the contact pressure forces from a frame of the drawing machine over the lugs of the link chain. This results in an extremely uniform distribution of the corresponding contact forces. In addition, no separate modules need to be provided for this purpose. This solution is particularly advantageous in conjunction with idler rollers, as disclosed, for example, in US Pat. No. 3,945,547 or in EP 0 548 723. In contrast, in this arrangement, the chain elements are subjected to extremely uniform pressure, which minimizes wear and tear or increases the power of the drawing machine.

[28] The object of the invention is also achieved cumulatively or alternatively by a drawing machine which has at least one lug-comprising link chain carrying drawing tools for drawing an elongated workpiece, in which case at least one lug faces the workpiece Side has a drawing tool support. By such a drawing tool support can be dispensed with further relevant assemblies. In particular, it is also possible, if appropriate, to transfer any contact forces directly to the respective drawing tool via the drawing tool support of the tabs, whereby a uniform force distribution is made possible by the use of a plurality of tabs.

A particularly advantageous power transmission between drawing tools and a frame of a drawing machine or idler rollers of a drawing machine results when a drawing tool of an adjacent chain element rests on a drawing tool support the tab of a chain element, when the drawing tool passes through a central drawing area. In that regard, the contact forces can be distributed to a plurality of successively arranged chain elements or tabs, whereby a total of higher contact forces can be applied.

[30] The object of the invention is cumulatively or alternatively also solved by a drawing machine which has at least one lashing chain comprising lugs, and the lashing chain has at least one frictional engagement device for the frictional connection between the link chain and the workpiece and pressing means for applying one for the Frictional connection has required contact force, and the pressing means comprise the tabs of the link chain.

[31] In this case, the tabs of the present link chain, like the connection pins described above, interact with connecting links of the link chain, so that the machining forces occurring when the workpiece is pulled are at least two spaced connecting points into those corresponding to the tabs Connecting links of the plate link chain are initiated. As a result, the connecting links of the link chain are exposed in particular to lower shear forces, as a result of which the advantages already described above are also achieved in connection with the present invention.

[32] The use of tabs of a link chain comprising a tab for transmitting the contact forces in a drawing machine makes it possible to design the chain more easily with equal contact forces, in particular in comparison with the solutions known from the prior art in which the contact forces are transmitted via blocks of a joint chain , As a result, for example centrifugal force problems that occur at high speed circulating chains, reduce.

[33] One embodiment provides that a link chain or link chain is a tooth chain. This makes it possible to use the advantages of a tab chain according to the above. He, too- follows a power transmission between the silent chain and corresponding sprockets relatively well, especially since a silent chain can interact easily with standardized sprockets together.

[34] The articulated chain or link chain can be used particularly effectively in conjunction with the present drawing machine, independently of the remaining marquettes of the present invention, if the drawing machine has at least one sprocket on which first rows extend perpendicular to the circumferential direction on its circumference first sprocket teeth and in the circumferential direction for this offset perpendicular to the direction of rotation extending second rows are arranged with second sprocket teeth, wherein the first Kettenradzähnereihen against the second Kettenradzähnereihen axially offset zu¬ each other.

By the mutually offset Kettenradzähnereihen also the individual Ketten¬ gear teeth of the first Kettenradzähnereihen against the sprocket teeth of the second Kettenradzähne¬ rows are arranged offset.

[36] Thus, a particularly large number of sprocket teeth is housed on a particularly small space at the circumference of the sprocket, which can attack alternately, for example, on a joint chain. In particular, the teeth or their flanks can also be configured axially overlapping. In this way, a particularly good and uniform force transmission between the sprocket and the link chain is created, which has a corresponding effect on the drawing process, which thus likewise proceeds more uniformly. This very good power transmission is due to the staggered Kettenradzähnereihen and the associated particularly large number of points of attack between the sprocket and the articulated chain.

[37] The term "circumference" essentially describes a region of the lateral surface of the sprocket on which the sprocket teeth are arranged.

[38] In the context of the invention, the term "circumferential direction" describes the component-specific direction of rotation which is predetermined for the sprocket when it drives or at least deflects a link chain of the drawing machine Essentially the direction of movement of the link chain of the drawing machine.

[39] In the present case, "sprocket teeth" are understood to mean any entrainment means which are suitable for being fastened to a sprocket in such a way that a link chain can be driven or deflected with them. [40] The term "sprocket teeth" is understood to mean rows of sprocket teeth spaced apart from each other in a direction perpendicular to the direction of rotation.The sprocket rows can be arranged on the sprocket at a distance from one another for example, be formed by the sprocket teeth in the manner of a helical sprocket.

[41] One embodiment provides for a sprocket which is formed from a plurality of individual sprocket blades, wherein first sprocket blades form first rows of first sprocket teeth of the sprocket and second sprocket second rows of second sprocket teeth of the sprocket blade and senk¬ right to the direction of rotation of the sprocket, the first Kettenradzähnereihen opposite to the second Ketten tenzahnereihen offset from each other.

[42] In this alternative embodiment, which is also advantageous regardless of an offset of Kettenradzähnerei hen, the sprocket does not consist of a single body, but is composed of a large number of individual Kettenradblättern. Thus, the sprocket can optionally be made and assembled by means of punched or cut components, and does not have to be made, for example, from a solid material. In this respect, such a sprocket can be produced relatively inexpensively.

[43] Preferably, the thickness of a sprocket wheel is identical to the thickness of a sprocket tooth arranged thereon, so that the present sprocket wheel is structurally particularly easy to produce. In order for the first sprocket blades to form first sprocket tooth rows and second sprocket blades for second sprocket tooth rows, preferably the first sprocket sprockets are twisted relative to the second sprocket blades on a rotation axis to form a sprocket. Preferably, adjoining Kettenradblätter are arranged rotated to each other, whereby a particularly uniform force distribution during operation can be guaranteed.

[44] It is advantageous if the first sprocket blades and the second sprocket blades are identical. Thus, all the sprocket wheels of a sprocket can be identically formed or manufactured, but due to the fact that the first sprocket and the second sprockets are rotated to each other to form a sprocket, arranged in a structurally particularly simple way the Ket¬ tenrad with staggered sprocket teeth. Due to the large number of identical components, the sprocket from the Kettenradblättern is particularly inexpensive to produce.

[45] A preferred embodiment provides that the first sprocket blades and the second sprocket blades are twisted together in an angle relative to one another to form a sprocket, in that a component free space is formed perpendicular to the direction of rotation of the sprocket between the first sprocket tooth rows and the second sprocket tooth rows. In this way, an overlap of the chain elements engaging in the teeth is made possible, whereby the distribution of force in the chain is reduced.

[46] The link chain can be relatively easily constructed when first Kettenradzähnereihen offset from the second Kettenradzähnereihen transverse to the direction of rotation of a sprocket offset by the thickness of a sprocket tooth to each other. This makes it possible to build the articulated chain of two types of chain elements each of the chain element width parallel angeordne¬ th tabs, the chain element types are each arranged alternately along the chain net. The sprocket rows can then each interact with a Kettenelementart.

[47] The "thickness" of a sprocket tooth is usually predetermined by the maximum material thickness of the sprocket tooth perpendicular to the direction of rotation, which has a sprocket tooth perpendicular to the direction of rotation of the sprocket wheel. The "thickness" of a sprocket tooth advantageously corresponds to the thickness of the sprocket blade.

[48] It is advantageous if, seen in the direction of rotation of a sprocket, between a arranged on the sprocket front sprocket tooth and an aligned on the sprocket ange¬ arranged rear sprocket tooth and / or between individual sprocket teeth of a sprocket blade a receiving area for the chain element of the joint chain or is present for individual components of the Ketten¬ element. In this way, a tab or another assembly of a chain element can be placed next to or between the sprocket teeth, so that, for example, the chain elements in a stretched part of the chain can form a continuous in the circumferential direction, but interrupted by offset ange¬ arranged recesses surface, via which contact forces wer¬ the.

[49] For the purposes of the present invention, the term "receiving area" describes a space between a front sprocket tooth and a rear sprocket tooth in which a chain element of a joint chain can be arranged wholly or at least partially as soon as the sprocket interacts with a link chain.

Such a receiving area is also advantageous, independently of the other features, for a drawing machine alone in order to be able to apply large pulling forces or contact forces. [51] Particularly large forces can be transmitted cumulatively or alternatively to the aforementioned features between the sprocket and the articulated chain, in particular if a chain having links is used, if the chain element of the articulated chain is arranged in a chain element receiving region of a chain wheel such that a sprocket tooth of the sprocket of the drawing machine is exclusively in contact with recess-free attack areas of the chain element or a corresponding tab. Because the sprocket tooth is in contact exclusively with the recess-free engagement areas of the chain element or the strap, such recesses can be dispensed with. This gives the respective chain element a good inherent rigidity in order to absorb the pulling forces on the sprocket tooth. In addition, by eliminating such recesses, the recess-free area can be used to apply contact forces.

[52] The recess-free engagement region is preferably, seen in the direction of rotation of the joint chain, arranged at a front and at a rear end of the chain element or the tab.

[53] In addition, it is cumulative or alternatively, in particular in the case of a linkage-comprising link chain, advantageous if a sprocket tooth of a sprocket has only operative connections to a joint chain in engagement areas of the chain element of the link chain, which has joints outside an intermediate area between two links the chain element are arranged an¬. By such arranged attack areas or surfaces is ensured that the sprocket tooth only comes into contact with outer boundary surfaces of the chain element and not with undercut areas of a chain element, which lie in areas between two links joints having joints. As a result, the chain elements are loaded directly by the Ket¬ tenradzähne only to pressure, which leads to an overall advantageous force application. Accordingly, larger forces or with equal forces of small assemblies can be used.

[54] In this context, it is advantageous if the chain elements of a link chain or their lugs or blocks have a straight or even Gleit¬ region at their sprocket facing areas. As a result of the straight or even sliding region, the articulated chain can have a large sliding or supporting surface to form a frame or a sliding and supporting zone of the drawing machine or to follower rollers. As a result, forces acting on the articulated chain via drawing tools can be conducted more effectively from the articulated chain to the drawing machine.

[55] The largest possible straight or even sliding area is obtained in particular if the chain elements have only recess-free engagement areas, since these are arranged only at the ends of the chain elements and not between two joints of a single chain element and the remaining ones Sprocket-facing areas of the chain elements can be largely used as a straight or flat sliding area.

For this purpose, it is advantageous if the straight or even sliding region corresponds at least in one main pulling region of the drawing machine to a frame, a sliding and supporting zone of the drawing machine or to idler rollers.

[57] In this case, the main drawing region forms at least one middle drawing path in which drawing tools are in contact with the workpiece.

[58] The features associated with the straight sliding region are also advantageous without the other features of the invention.

[59] In comparison to the sprocket, the articulated chain is given a particularly stable and thus advantageous guidance when a sprocket tooth of a sprocket is flanked in each case by two chain elements of the articulated chain, at least in the area of action with the articulated chain of the drawing machine.

Further advantages, objects and features of the present invention will be described with reference to the following attached drawing, in which drawing implements and their essential components are shown by way of example.

[6I] It shows

1 shows schematically a side view of a drawing machine with a drawing die,

FIG. 2 is a schematic side view of another drawing machine;

FIG. 3 is a schematic perspective view of a first chain hoist, FIG. 4 is a schematic perspective view of a chain wheel with a link chain,

FIG. 5 is a schematic plan view of a sprocket with a link chain;

Figure 6 schematically shows a view of a hinge connection of a joint chain and

Figure 7 schematically shows a cross section through a drawing plane of a drawing machine.

[62] The drawing machine 1 shown in FIG. 1 for drawing an elongated workpiece 2 has a frame 3 in which a first chain hoist 4 and a second chain hoist 5 are arranged. The rack 3 of the drawing machine 1 has in its inlet region 6 a die holder 7, to which a die 8 is attached. The elongate workpiece 2 is drawn in the conveying direction 9 and in a drawing plane 10 (perpendicular to the drawing plane of FIG. 1) through the die 8 and accordingly transported from the inlet region 6 through the drawing machine 1 to an outlet region 11. [63] In order to pull the elongated workpiece 2 through the die 8, a corresponding pulling force 12 is transmitted to the elongated workpiece 2. This is done in the drawing machine 1 by the first chain hoist 4 and by the second chain hoist fifth

[64] For this purpose, the first chain hoist 4 of the drawing machine 1 has a first link chain 13. The first link chain 13 consists essentially of chain elements 14, which are hingedly connected to each other via chain links 15 by means of connecting links 16. In order to transfer the machining forces required for drawing the elongate workpiece 2 as homogeneously as possible from the first link chain 13 to the elongated workpiece 2, the first link chain 13 comprises drawing tools 17, by means of which a large-area and homogeneous force transmission between the elongate workpiece 2 and the first Chain hoist 4 is guaranteed.

[65] The first link chain 13 is deflected and / or driven by means of a front sprocket 18 and a rear sprocket 19. Both the front sprocket 18 and the rear sprocket 19 rotate about a rotation axis 20 and about a rotation axis 21, respectively. To move the elongate workpiece 2 in the drawing direction 9, both the front sprocket 18 and the rear sprocket 19 rotate in a circumferential direction 22 (only exemplified at the rear sprocket 19).

The second chain hoist 5 of the drawing machine 1 in this embodiment has an identical structure as the first chain hoist 4. The second chain hoist 5 also has a front sprocket 23 and a rear sprocket 24, the front sprocket 23 rotating about a rotation axis 25 and the rear sprocket 24 about an axis of rotation 26. Both the front sprocket 23 and the rear sprocket 24 rotate during the transport of the elongate workpiece 2 in the direction of rotation 27 (only exemplarily shown on the rear sprocket 24). On the second chain hoist 5, a second link chain 28 of the drawing machine 1 is driven by means of the front chain wheel 23 and the rear chain wheel 24. The second link chain 28 also has chain elements 29, which are hinged together in chain links 30 by means of connecting members 31.

[67] For the sake of clarity, the illustration of drawing tools 17 has been dispensed with with regard to the second link chain 28. However, it is understood that the second link chain 28 should also have pulling tools 17 in order to be able to uniformly transfer machining forces between the second link chain 28 and the elongated workpiece 2.

[68] So that the sprockets 18, 19, 23 and 24 of the drawing machine 1 can transmit driving forces to the first link chain 13 and the second link chain 28 respectively, each of the chain wheels 18, 19, 23 and 24 of the drawing machine 1 has its respective sprocket circumference 32 Sprocket teeth 33 on. The clear For the sake of speed, the sprocket circumference 32 and the sprocket teeth 33 are numbered only at the front sprocket 23.

[69] The chain elements 14 of the first articulated chain 13 and the chain elements 29 of the second articulated chain 28 are designed as tabs in this drawing machine 1 (explained by way of example with reference to FIGS. 3 to 7) to which the respective drawing tools 17 are fastened.

[70] By means of the drawing tools 17, which in the present case are arranged on the lugs or on the chain elements 14, 29 of the articulated chain 13 or 28, a frictional connection between the Gelenk¬ chains 13 and 28 and the elongated workpiece 2 is produced. Here, the component groups of the link chains 13 and 28 contact pressure for applying a contact force required for the frictional connection available, at least two tabs of a chain element 14, 29 or two overlapping tabs adjacent chain elements 14, 29 contact surfaces 34 on its side facing away from the elongated workpiece 2 ready put. By means of these contact surfaces 34, the chain elements 14, 29 or the lugs of the chain elements 14, 29 are supported on sliding and supporting zones 35 of the drawing frame 3 so that machining forces required for applying the pulling forces 12 are particularly extensive between the elongated workpiece 2 and the drawing machine frame 3 can be transmitted.

[71] The sliding and supporting zones 35, on which the contact surfaces 34 of the individual chain elements 14, 29 of the link chains 13 and 28 are supported, essentially extend in a main pulling region 36 of the drawing machine 1 both on the first chain hoist 4 and on the first chain hoist 4 second chain hoist 5 and can be realized in itself by means known from the prior art measures. The main pulling region 36 in this exemplary embodiment lies between the front sprocket 18 and the rear sprocket 19 or between the front sprocket 23 and the rear sprocket 24. Not shown are means of this drawing machine for adjusting the distance between the two chain trains 4 and 5, to account for different tool diameter. Also not shown are means of this drawing machine for applying the contact pressure between the sliding and support zones 35 and the frame 3. for these purposes, for example, hydraulic arrangements or He¬ bel, eccentric pins or wedges are used. It is understood that by such measures, both a distance adjustment and the contact forces can be realized.

The drawing machine 101 shown in FIG. 2 has a drawing machine frame 103 on which a first chain hoist 104 and a second chain hoist 105 are arranged. The first chain hoist 104 can be moved vertically in the drawing machine 101 according to the double arrow direction 140 compared to a drawing line 110. The second chain hoist 105 is correspondingly perpendicular to the drawing level 110 according to the double arrow directions 141 publishers. In this way, the drawing machine can be adapted to different thicknesses and applied a required contact pressure. The drawing plane indicated by the reference numeral 110 extends in the present case perpendicularly into the plane of the paper or out of the plane of the paper.

[73] By means of the two chain hoists 104 and 105, a drawn material (not explicitly shown here) is transported from an inlet region 106 to a discharge region 111 by the drawing machine 101.

For transporting the drawn material, the first chain hoist 104 has a first link chain 113, which is driven by means of a front sprocket 118 and a rear sprocket 119 and rotates in the first chain hoist 104. The front sprocket 118 rotates about a rotation axis 120 and the rear sprocket 119 about a rotation axis 121.

In order that a particularly favorable frictional connection is produced between the first articulated chain 113 and the drawn material, the first articulated chain 113 has drawing tools 117 which are precisely matched to the drawn material to be transported. The drawing tools 117 are arranged directly on perpendicular to a circumferential direction 127 extending connecting members 131 of the first link chain 113, which also connect the tabs of a plate chain, not shown, arranged. In this embodiment, each pulling tool 117 is arranged on two such connecting members 131. Forces acting on the first link chain 113 in the drawing plane 110 are absorbed by sliding and cutting zones 135 of the drawing machine 101.

[76] According to the structure of the first chain hoist 104, the structure of the second chain hoist 105 is designed. The second hoist 105 also includes a front sprocket 123 and a rear sprocket 124, the front sprocket 123 being rotatably mounted on a rotation axis 125 is while the rear sprocket 124 is rotatably mounted on a rotation axis 126. By means of the two chain wheels 123 and 124, a second link chain 128 is driven, which rotates on the second chain link 105. The drawing tool 117 of the second link chain 128 acts in the region of the drawing plane 110 on the one hand with the drawn material and on the other hand with drawing tools 117 of the first link chain 113 of the first chain train 104. In order to be able to guide forces, which act in particular in the region of the drawing line 110 on the second articulated chain 128, into the frame 103 of the drawing machine 101, the second chain link 105 likewise comprises sliding and supporting zones 142.

The first chain hoist 204 shown in FIG. 3 of a drawing machine otherwise substantially corresponding to the arrangements of FIGS. 1 and 2 essentially comprises a front sprocket 218 and a rear sprocket 219 with which a link chain 213 is driven. [78] In the region of a drawing level 210, this first chain hoist 204 has a follower roller device 250, on whose follower rollers 251 the articulated chain 213 is supported, in particular when, starting from the pull level 210, contact forces 252 act on the link chain 213. In the present case, a main drawing region 236 of the drawing machine essentially extends in the region of the follower roller device 250. The contact forces 252 arise when a frictional connection is produced between drawing stock (not shown here) and the articulated chain 213 by means of drawing tools 217 and a contact pressure force of known arrangements a machine frame (similar to the racks 3 and 103 of Figures 1 and 2) is applied via the idler rollers on the hinge chain 213.

In this exemplary embodiment, each drawing tool 217 is fastened to lugs 253 (numbered here only by way of example) or chain elements 296 of the link chain 213 formed from these lugs 253 and lugs arranged parallel thereto. The chain elements 296 are ver¬ connected by means of connecting members 231 with each other and with adjacent chain elements 297, which are also formed from tabs. By way of example, the tab 253 is an outer tab of the articulated chain 213, which is articulated via the connecting member 231 at least to an inner tab 254 of the chain element 297. The outer tabs 253 of the chain elements 296 are beyond the workpiece side slightly higher than the other tabs of this chain element 296 formed so that hier¬ can be secured laterally by the tools.

As indicated by way of example in FIG. 3, connecting lugs 286, 287 can be defined on the lugs 253, 254 as those regions which are arranged in the vicinity of the connecting member 231 and form the joint therewith.

[81] A peculiarity of the present tabs 253, 254 can be seen in the fact that they are plan-formed on the sides 255 facing the sprockets 218, 219 so that they engage with the sprockets 218, 219 on the follower rollers 251 the follower roller device 250 lie over a large area auf¬. Due to the large contact surfaces between the follower rollers and the plane-shaped side 255, the contact forces 252 are transmitted particularly well from the articulated chain 213 to the follower roller device 250.

[82] In addition, the tabs 253 cooperate with sprocket teeth 256 of the sprockets 218 and 219 such that the tabs 253 engage in receiving portions 257 of the sprockets 218, 219.

[83] By way of example, this mechanism is explained with regard to the front sprocket 218. For example, an outer tab 258 of the articulated chain 213 engages in one of the receiving areas

257 of the sprocket 218 a. The receiving area 257, in which the outer flap 258 in the Kon- is arranged with the sprocket 218, is bounded on the one hand by a front sprocket tooth 259 and a rear sprocket tooth 260 of the sprocket 218. Thus, the outer flap 258 is positively connected to the sprocket 218 so that driving forces from the sprocket 218 to the link chain 213 can be advantageously transmitted. In order to guide the outer flap 253 laterally stable in the receiving region 257, that is to say in the engagement region of the sprocket 218, the outer flap 253 is additionally provided by an outer sprocket tooth 261 of the sprocket 218 and secondly by an inner sprocket tooth (not here) flagged) of the sprocket 218 flanked.

Thus, the outer flap 253 receives an extremely stable guidance in the area of the front sprocket 218, so that even particularly strong forces can not cause the outer flap 254 to break out of the receiving area 257 of the front sprocket 218. The front sprocket 218 is rotatably supported on a rotation axis 220. The same applies of course to all other tabs and teeth of the link chain 213.

The rear sprocket 219 has an identical structure to the front sprocket 218 and is rotatably mounted on a rotation axis 221.

In the illustration according to FIG. 3, the first sprocket tooth rows 265 and second sprocket tooth rows 266 can be seen particularly well on the rear sprocket 219, with both the first sprocket rows 265 and the second sprocket teeth rows 266 having sprocket teeth 256 spaced apart from each other. The first sprocket teeth rows 265 and the second sprocket teeth rows 266 extend transversely to a circumferential direction 222 of the sprockets 218 and 219.

The sprocket teeth rows 265, 266 of the sprockets 218 and 219 are substantially aligned with the axis of rotation 220 and with the axis of rotation 221, respectively, to which sprocket 218 or 219 the sprocket rows 265 and 266 belong. The sprocket teeth 256 of the first chain sprocket row 265 are offset relative to one another in this exemplary embodiment with respect to sprocket teeth 256 of the second sprocket row row 266, as can be seen immediately.

The sprocket 318 illustrated in FIG. 4 and FIG. 5 is formed in this exemplary embodiment from 19 individual sprocket blades 370 (numbered here only by way of example), while the sprockets described above have conventionally been designed as solid gears. All of the sprocket blades 370 used here are identical and are mounted together on a rotation axis 320 such that the plurality of sprocket blades 370 form first sprocket tooth rows 365 and second sprocket tooth rows 366 of the toothed wheel 318. The individual sprocket blades 370 are rotated by means of first clamping means 372 and second clamping means 373 and by means of securing bolts 395. securely clamped to each other and to the other against rotation to the rotation axis 320. In the present case, the first sprocket wheels and second sprocket blades are twisted at an angle to one another to the sprocket 318 such that a free space 374 is formed between the first sprocket rows 365 and the second sprocket rows transverse to the direction of rotation of the sprocket 318 and, for example, the first sprocket rows 365 around Arc segment 371 each spaced vonein¬ other.

The individual sprocket teeth 356 of the sprocket tooth rows 365 and 366 are each spaced apart from each other by the amount of the thickness 375 of a sprocket tooth 356 and, in the present case, one of the sprocket blades 370. The sprocket blades 370 herein have a thickness which is identical to the thickness 375 of sprocket teeth 356. The sprocket teeth 356 of the first sprocket row 365 and the sprocket teeth 356 of the second sprocket set 366 are offset from one another.

Between a pair of sprocket teeth 356 of a sprocket blade 370, a respective receiving area 357 for chain elements 314 (numbered here only by way of example) of a joint chain 313 is accordingly provided. At a total of ten adjacent tabs 314 (exemplified bezif¬ fert) of the hinge chain 313, each forming a chain element 396, a pulling tool 317 is attached. Each of the ten tabs 314 corresponds for its part to a receiving area 357 provided for this purpose, which are each formed between sprocket teeth 356 of two adjacent first sprocket rows 365. The sprocket teeth 356 of the second sprocket rows 366 take over substantially stabilizing functions for the straps of a further chain element 397, which in each case engage in a receiving area 357 between two sprocket teeth 356 of two first sprocket teeth rows 365. By means of this flanking measure, the articulated chain 313 is guided particularly well with respect to the sprocket 318.

All the chain elements 396, 397 of the articulated chain 313 are connected with their adjacent chain elements 397, 396 via links 316 in an articulated manner.

The chain link 415 shown in FIG. 6 consists of a first chain element 496, which comprises a first left tab 480, a block 489 and a first right tab 481, a second chain element 497, which has a second left tab 482 and a second link right tab 483, and a link 416. The chain is then continued according to a mirror image. It is understood that in an alternative embodiment instead of a separate connecting member and integrally configured with the respective chain elements connecting elements, such as joint shells, sliding bolts or the like, can be used. In the present case forms a first component group "First left chain member 480, second left chain member 482 and link 416" a left hinge portion 484, whereas another component group "first right chain member 481, second right chain member 483 and link 416" forms a right hinge portion 485 of the chain link 416.

In this embodiment, the first chain member 396 still includes the block 489 which serves as a tool holder and is secured to the link 416 by means of a first connecting pin 486, a second connecting pin 487 and a third connecting pin 488. Via the connecting pins 486, 487 and 488, pulling forces at three spaced connecting points 490 (here only exemplarily characterized) are glided directly into the connecting member 416, so that the pulling forces are transferred more homogeneously to the connecting member 416 and into the chain , As a result, a better load on the link 416 is achieved. In particular, shearing forces occurring at the connection points 490 are distributed in accordance with the number of connection points 490 and introduced more easily into the connection member 416.

[94] As a result, in particular, the diameter of the connecting member and / or the forces occurring in the joint can be significantly reduced.

It is understood that depending on the specific embodiment, the tool holder 489 does not necessarily have to be connected to two chain links or to two connecting links 416. If this is not the case, the tool holder is merely fastened to a chain joint or connecting link 416, so that the forces present in the chain are not conducted via the tool holder. Only the individually occurring on a tool pulling forces are then introduced via the respective tool holder 489 in the corresponding link 416 and thus in the chain. In this case, the tool holder 489 is not part of the chain itself, so that it is then in the arrangement of Figure 6 is a tab chain and not a block-tab chain. In such an arrangement, it is then advantageous regardless of the other features of the present invention for a more uniform force distribution that the forces are applied to the connecting member 416 via a plurality of connecting pins 486, 487, 488.

Moreover, as can be seen directly in FIG. 6, pins can be defined at the ends of the tabs 480, 481, 482, 483, as has already been clarified in FIG. 3 on the basis of the exemplary embodiment illustrated there. In particular, the above-described joint regions 484, 485 offer themselves for this purpose. Moreover, in this embodiment, the tools can also be fastened exclusively to the tabs 480, 481, 482, 483 or additionally to the tabs 480, 481, 482, 483. It is also conceivable in the embodiment of FIG. 6 between the connecting pin 486 and 487 or 487 and 488 each tabs, similar to the tabs 482, 483, or appropriate Verbindungs¬ pin to arrange.

The first chain hoist 504 and second chain hoist 505, which are shown in cross section perpendicular to the drawing plane 510 and to the drawing direction in FIG. 7, each have a follower roller carrier 550 (numbered here only as an example with respect to the second chain hoist 505). The follower roller carrier 550 carries follower rollers 551, on which a first articulated chain 513 or a second articulated chain 528 are supported. Such an arrangement can in particular be used in conjunction with the arrangement shown in FIG.

[98] The first chain hoist 504 and the second hoist 505 are identical in this embodiment. For the sake of clarity, individual identical components or identical subassemblies are only given by way of example in the present case.

The first articulated chain 513 consists of chain elements 596, which are connected by means of connecting links 516 articulated to chain elements 597. A pulling tool 517 is connected via a Schwalben¬ tail connection 586 with the chain elements 596 and secured by means of lateral elevations 589 of the outer tabs of the chain elements 596. As can be seen immediately, a tool attachment can be particularly easily realized.

[100] An elongated workpiece 502 of the drawing plane 510 is transported by means of the first articulated chain 513 and an identical second articulated chain 528. In the present case, the transport direction is directed into the plane of the paper.

[101] As can be seen immediately, the chain elements 596 and 597 each have planar surfaces on the tool side, which are interrupted at individual points. The tools can support themselves well on these surfaces, so that the contact forces are distributed extremely uniformly.

[102] The same applies to the side facing away from the workpiece 502, whereby the follower rollers 551 can roll very uniformly on the chain elements 596 and 597.

As can be seen in particular with reference to FIG. 4, the tools 217, 317, 517 can be designed to be shorter than the chain elements 596 in the circumferential direction of the chains. On the other hand, it is conceivable to design the tools as long or longer than the chain elements 596. In such an embodiment, the tools can then, as shown in FIG. 7, rest both on the chain elements 596 and on the chain elements 597. Alternatively, tools can also be fastened or provided directly on the chain elements 597. In addition, it is also conceivable to form the tools in one piece with the chain elements or in one piece with individual assemblies of the chain elements.

Dedicated to:

1; 101 pulling machine

2; 502 elongated workpiece

3; 103 drawing machine frame

4; 104; 204 first chain hoist

5; 105 second chain hoist

6; 106 Reclamation area

7 bracket

8 die

9; 109 draw direction

10; 110; 210; 510 drawing level

11; 111 outlet area

12 pulling force

13; 113; 213; 313; 513 first joint chain

14; 314 chain elements

15 chain joints

16; 316; 416; 516 connecting links

17; 117; 217; 317; 517 drawing tools

18; 118; 218; 318 front sprocket

19; 119; 219 rear sprocket

20; 120; 220; 320 front rotation axis

21; 121; 221 rear axis of rotation

22; 122; 222 circulation direction

23; 123 front sprocket

24; 124 rear sprocket

25; 125 front rotation axis

26; 126 rear rotation axis

27; 127 circulation direction

28; 128; 528 second articulated chain

29 chain elements

30 chain joints

31; 131; 231 connecting links

32 sprocket circumference 33 sprocket teeth

34 contact surfaces

35; 135 sliding and support zone

36; 236 Main drawing area 140 Double arrow direction

141 double arrow direction

142 sliding and support zone 250; 550 follower roller device 251; 551 idler rollers 252 contact forces

253 tabs

254 inner tabs

255 side facing the sprockets

256 sprocket teeth 257; 357 recording area

258 outer flap

259 front sprocket tooth

260 rear sprocket tooth

261 outer sprocket tooth 265 first Kettenradzähnereihen

266 second sprocket rows

286 first connecting pin

287 second connecting pin 296 chain element 297 chain element

318 sprocket

370 sprocket wheels

371 route

372 first clamping means 373 second clamping means

374 component free space

375 thickness of a sprocket tooth

395 securing bolts

396 chain element 397 chain element

480 a first left tab

481 a first right tab

482 a second left tab 483 a second right tab

484 left joint area

485 right hinge area

486 first connecting pin

487 second connecting pin 488 third connecting pin

489 pulling tool holder

490 connection points 496; 596 chain element 497; 597 chain element 586 dovetail connection

589 lateral elevation of the chain elements 596

Claims

claims:

1. Drawing machine for drawing an elongate workpiece with at least one drawing tools bearing link chain made of chain links connected chain elements, the Ket¬ tengelenke on the one hand the chain elements and on the other hand the chain elements hingedly connecting links comprise and wherein at least one pulling tool directly with a connecting member, characterized in that the drawing tool is connected to each connecting link (231, 416), with which the drawing tool is in direct contact, via at least two connecting pins (286; 480, 481; 486, 487, 488) between which at least one connecting pin (287; 482 , 483) of a second chain element is in contact.

2. Drawing machine according to claim 1, characterized in that exactly one connecting pin (287) of the second chain element between the at least two connecting pins (286) is arranged an¬.

3. Drawing machine for drawing an elongate workpiece with at least one block comprising the articulated chain, which has chain links interconnected chain elements, wherein the chain joints each comprise two chain elements connecting links, characterized in that each block of a chain element (14) to each its Verbin¬ ment links (16) at least two juxtaposed and spaced-apart connection points (490), between which at least one connection point (490) of an adjacent chain element (14) is arranged.

4. Drawing machine for drawing an elongated workpiece with at least one drawing tool-bearing link chain made of chain links connected chain elements, the Ket¬ tengelenke on the one hand the chain elements and on the other hand the chain elements hinged connecting links and at least one pulling tool is attached to a chain link , And with at least one Reibschlusseinrichtung for frictional Verbin¬ connection between the joint chain and the workpiece and with pressing means for applying a required for the frictional connection, applied by a frame contact pressure, the contact force acting directly on the chain link, characterized in that the drawing tool with each connecting member (231, 416), with which the drawing tool is directly in contact, is in contact with at least two connecting pins (286; 480, 481; 486, 487, 488).

5. Drawing machine for drawing an elongate workpiece with at least one lugs umfas¬ send and pulling tools bearing articulated chain chain links with each other verbun¬ which chain elements, the chain joints each comprise two chain elements connecting links, characterized in that the drawing tools (17) on the tabs (253) are attached.

6. Drawing machine according to one of the preceding claims, characterized by at least one lugs (253) comprising a link chain (13, 28), at least one Reibschlusseinrichtung for frictional connection between the link chain (13, 28) and workpiece (2) and Anpressmit¬ tel for applying a the frictional connection required contact pressure (252), wherein at least two tabs (253) of a chain element (14) or two overlapping tabs

(253) of adjacent chain elements (14) have contact surfaces (34) on their side facing away from the workpiece (2).

7. Drawing machine according to one of the preceding claims, characterized by a Zie¬ hen for an elongated workpiece (2) by means of at least one tabs (253) comprehensive and drawing tools (17) carrying the articulated chain (13, 28), wherein at least one tab (253 ) has a drawing tool support (489) on its side facing the workpiece (2).

8. Drawing machine according to one of the preceding claims, characterized in that on a drawing tool support (489) of the tab (253) of a chain element (14) a Ziehwerk¬ tool (17) of an adjacent chain element (14) rests when the tool (2) passes through a main pull area (36).

9. Drawing machine according to one of the preceding claims, characterized by at least one lugs (253) comprising plate link chain, at least one Reibschlusseinrichtung reib¬ for positive connection between the link chain and the workpiece (2), and contact pressure means for applying a required for the frictional connection contact pressure (252 ), wherein the pressing means comprise the tabs (253) of the link chain.

10. Drawing machine according to one of claims 1 to 9, characterized in that a Gelenk¬ chain (13, 28) or a link chain is a toothed chain.

11. Drawing machine according to one of claims 1 to 10, characterized by a sprocket (18, 19, 23, 24) on which at its sprocket circumference (32) and perpendicular to its direction of rotation (22, 27) extending first rows (265) first sprocket teeth (256) and second rows (266) on second sprocket teeth (256) are arranged, wherein perpendicular to the circumferential direction (22, 27) of the sprocket (18, 19, 23, 24), the first Kettenradzähnereihen (265) relative to the second Kettenradzähnereihen (266) offset from one another.

12. Drawing machine according to one of claims 1 to 10, characterized by a sprocket (18, 19, 23, 24) which is formed of individual sprocket blades (370), wherein first sprocket blades

(370) first rows (265) on first sprocket teeth (256) of the sprocket (18, 19, 23, 24) and second sprocket blades (370) second rows (266) on second sprocket teeth (256) of the sprocket wheel (18, 19 , 23, 24) and perpendicular to the direction of rotation (22, 27) of the sprocket (18, 19, 23, 24), the first sprocket rows (256) are offset relative to the second sprocket rows (266).

13. A drawing machine according to claim 12, characterized in that the first sprocket blades (370) and the second sprocket blades (370) are identical.

14. Drawing machine according to one of claims 12 or 13, characterized in that the first sprocket blades (370) and the second sprocket blades (370) are twisted in such an angle to each other to a sprocket (18, 19, 23, 24) summarized, that a component free space (374) is formed transversely to the circulating direction (22, 27) of the sprocket (18, 19, 23, 24) between the first sprocket teeth rows (256) and the second sprocket teeth rows (266).

15. A drawing machine according to one of the preceding claims, characterized in that first Kettenradzähnereihen (256) opposite second Kettenradzähnereihen (266) perpendicular to the direction of rotation of a sprocket (18, 19, 23, 24) by the thickness (375) of a sprocket tooth (256 ) are offset from one another.

16. Drawing machine according to one of claims 1 to 15, characterized in that in Umlauf¬ direction (22, 27) of a sprocket (18, 19, 23, 24) seen between one on the sprocket (18, 19, 23, 24) arranged front sprocket tooth (256, 259) and an aligned on the sprocket (18, 19, 23, 24) arranged rear sprocket tooth (256, 260) and / or arranged in the circumferential direction behind the other at the same axial height Kettenrad¬ teeth (256) a sprocket blade (370) a receiving portion (257) for a chain element (14) of the link chain (13, 28) is present.

17. Drawing machine according to claim 16, characterized in that the receiving region has at least the thickness (375) of a sprocket tooth (256) and / or sprocket blade (370).

18. Drawing machine according to one of claims 16 or 17, characterized in that the receiving region (257) has at least the thickness of a chain element (14) of the articulated chain (13, 28).

19. Drawing machine according to one of claims 1 to 18, characterized in that in a Kettenelementaufhahmebereich (257) of a sprocket (18, 19, 23, 24), the chain element (14) of the articulated chain (13, 28) is arranged such that a Sprocket tooth (256) of the sprocket (18, 19, 23, 24) of the drawing machine (1) exclusively with ausausangsfreien attack areas of the chain element (14) is in contact.

20. Drawing machine according to one of claims 1 to 19, characterized in that a sprocket tooth (256) of a sprocket (18, 19, 23, 24) of a drawing machine (1) only Wirkverbin¬ training in attack areas of the chain element (14) of Articulated chain (13, 28), wel¬ che outside an intermediate region of the chain element (14) are arranged, the Ess¬ substantially between two connecting links (16) having chain links (15) angeord¬ net is.

21. Drawing machine according to one of claims 1 to 20, characterized by a link chain (13, 28), the chain elements (14) or lugs or blocks on their sprockets (18, 19, 23, 24) facing areas a straight or even Have sliding area.

22. Drawing machine according to claim 21, characterized in that the straight or plane Gleit¬ area corresponds at least in a Hauptziehbereich (36) with a frame (3) or a sliding and support zone (142) of the drawing machine (1).

23. Drawing machine according to one of claims 1 to 22, characterized in that a Ketten¬ gear tooth (256) of a sprocket (18, 19, 23, 24) at least in the effective range with the hinge chain (13, 28) of the drawing machine (1) respectively flanked by two chain elements (14) of the articulated chain (13, 28).

24. A method for drawing an elongated workpiece by means of at least one drawing tools-bearing link chain connected by chain links chain elements, wherein the Ket¬ tengelenke on the one hand the chain elements and on the other hand the chain elements articulating connecting links and wherein pulling forces from a toeing tool directly into at least one corresponding link characterized in that the pulling forces of the drawing tool in each of the with the drawing tool kor- responding connecting members via at least two connection points between which at least one connection point of a not directly with the drawing tool in connection standing chain element is arranged, are introduced.

25. A method for drawing an elongated workpiece by means of at least one drawing tools bearing link chain made of chain links connected chain elements, wherein the Ket¬ tengelenke on the one hand the chain elements and on the other hand, the chain elements hinged connecting links, wherein pulling forces from a toeing tool directly into at least one corresponding link be guided, wherein the workpiece is frictionally engaged by the link chain and wherein for the frictional connection required pressure forces are applied by a frame and the contact pressure directly on the

Chain link act, characterized in that the pulling forces are introduced from the drawing tool in each of the connecting members corresponding to the pulling tool via at least two connection points.

26. A method for drawing an elongated workpiece, in which by means of at least one La see (253) comprehensive articulated chain (13, 28) for pulling pulling forces (12) are applied, characterized in that the pulling forces (12) of the Workpiece (2) via the tabs (253) in the articulated chain (13, 28) are introduced.

27. The method according to any one of claims 24 to 26, wherein by means of at least one tab (253) comprising link chain between the link chain and the workpiece (2) a frictional connection is formed, characterized in that the force required for Reibschlussverbin¬ contact force (252) is applied over the tabs (253) of the link chain.