Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
  • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
  • B21C1/27—Carriages; Drives
  • B21C1/28—Carriages; Connections of grippers thereto; Grippers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
  • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
  • B21C1/20—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes from stock of essentially unlimited length
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
  • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
  • B21C1/27—Carriages; Drives
  • B21C1/30—Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H51/00—Forwarding filamentary material
  • B65H51/14—Aprons, endless belts, lattices, or like driven elements

Definitions

• the invention relates to a method for changing the caliber range of a chain-comprising pull chain of a crawler pulling machine and crawler pulling machine.
• the invention relates to a crawler pulling machine comprising one
• the caterpillar train can draw a workpiece reshaping through the drawing die along a drawing line aligned parallel to the drawing direction and for this purpose comprises two revolving chain links and drawing tools which are arranged or designed to grip the workpiece and pull through the drawing die in accordance with the rotational movement of the drawing chains of the caterpillar train.
• the drawing tools or drawing chains run parallel to or in a drawing plane intersecting the drawing line.
• the drawing recesses are adapted to the cross section of the workpiece to be drawn, at least within certain limits. The purpose of this is to be able to grip the respective workpieces safely without damaging the workpiece in the process.
• the respective drawing tools are pressed against one another with the required force, for example, by means of corresponding pressure bars which carry pressure rollers and, if appropriate, also by idler rollers in a gripping area, it being assumed that the pressure forces are about ten times as much must be high, such as the pulling forces which the caterpillar pull has to exert through the drawing die to pull the workpiece.
• a certain shape of a drawing recess allows a certain caliber range of workpiece cross-sections, which can be gripped in a reliable manner with the corresponding drawing recess.
• the object of the invention is achieved by a caliber changing method for changing the caliber range of a chain comprising a chain link of a crawler pulling machine and by a crawler pulling machine with the features of the independent claims. Further, possibly also independent, advantageous configurations can be found in the subclaims and the following description.
• the drawing tools which comprise the first and second drawing recesses and are arranged on the chain links of the drawing chain of the caterpillar train, can be aligned together with the respective chain link.
• the caliber range of the pull chain or pull chains can be changed easily and reliably, since the pulling tools can be aligned together with the respective chain link in relation to the pull line or the pulling plane in such a way that the two pull recesses are aligned accordingly with respect to the pull line are as desired for drawing a particular workpiece.
• the drawing tools at least one of the two pulling chains of the caterpillar pulling machine belonging to the caterpillar pulling machine can be aligned perpendicular to the drawing line together with the respective chain link.
• the caliber range of the pull chain or pull chains can be changed easily and reliably.
• Such a shift can take place in particular if the chain carrier and / or at least one of the sprockets is shifted accordingly by means of an axial drive or if the chain is still under tension.
• it is in particular not absolutely necessary to have the drawing chain circulate, since in principle all assemblies which are in contact with the chain can be axially displaced equally, so that large frictional forces should not occur here.
• a simple and reliable change of the caliber range of the drawing chains can also be ensured if the drawing recesses of a first of the two drawing chains deviate from the drawing recesses of a second of the two drawing chains or are arranged at least perpendicular to the drawing line on their respective chain links. This also applies if for the first caliber range, for which the first drawing recesses of the at least one of the two drawing chains are intended, two different drawing recesses of the second of the two drawing chains are intended.
• Such a detailed selection of the suitable caliber, with which the respective workpieces can ultimately be gripped by the drawing tools, can be ensured in a simple and reliable manner in this way, in particular without the need to replace drawing tools.
• a correspondingly large caliber range can be covered with a corresponding set of drawing tools for the two drawing chains if the respective drawing recesses on the drawing tools of the two drawing chains are selected in a suitable manner.
• the drawing tools and the respective chain links of the second drawing chain can be aligned with a directional component that deviates from the directional component with which the drawing tools and chain links of the first drawing chain are aligned. It may be conceivable to shift the pulling tools of the first pull chain to the left with respect to a drawing plane intersecting the pull line, while the pulling tools of the second pull chain are shifted to the right with respect to the pull plane in order to achieve the desired pairing of pull recesses of the first pull chain and To receive pull recesses of the second drawing chain, which are each aligned with respect to the drawing line.
• a workpiece is reshaped through the drawing die along a drawing line oriented parallel to the drawing direction.
• drawing machines such as 2-slide drawing machines or revolving roller drawing machines
• a very high drawing speed can be guaranteed with excellent straightness of the workpieces to be drawn, whereby overall such track pulling machines prove to be relatively complex and therefore costly because of the track pulls .
• this comprises at least one pull chain with corresponding chain links, with a wide variety of chain types, such as pure block chains, block-link chains or pure link chains or more complex chain arrangements of two parallel chains, etc. are known as pull chains.
• a caterpillar pull can pull the workpiece, for example, with just one pull chain and only with one set of corresponding pulling tools which are driven by the pull chain a frictional connection between the workpiece and the drawing tools can be ensured by means of pliers-like designs or other measures. Possibly.
• the drawing tools can also be driven jointly by two parallel drawing chains, as is also known from the prior art.
• drawing tools comprising at least first and second drawing recesses are arranged or formed on the chain links of the drawing chain, pulling of the corresponding workpiece through the drawing die can be ensured by such a caterpillar pull, as long as suitable measures, as already indicated above , an adequate friction or frictional connection between the workpiece and the drawing tool can be guaranteed.
• the drawing tools can also have first and second drawing recesses, the first drawing recesses being determined for a first caliber range and the second drawing recesses for a second caliber range deviating from the first caliber range, so that one drawing tool in each case covers an entire caliber range , which comprises the first and the second caliber range, can be provided.
• the drawing recesses are preferably arranged with one component perpendicular to the drawing line next to one another on the respective drawing tools, so that the first drawing recesses and the second drawing recesses are optionally aligned with respect to the drawing line by a corresponding displacement of the respective drawing tools perpendicular to the drawing line can to switch the caliber range between the first and the second caliber range accordingly.
• the drawing tools of at least one of the two drawing chains comprise two drawing recesses
• the drawing tools of the other of the two drawing chains each have only one drawing recess, insofar as this is suitable, in interaction with the two Drawing recesses of the drawing tools of the first drawing chain to be able to cover the desired caliber range taking into account the position of the respective drawing tools in relation to the drawing line to the extent that the respective workpieces can be gripped sufficiently firmly without damaging them.
• first and second drawing recesses of the first drawing chain can optionally be aligned with respect to the drawing line by displacing the respective drawing tools perpendicular to the drawing line.
• the final caliber can then be selected in relation to the respective workpiece.
• drawing tools comprising at least two drawing recesses can also be arranged or formed on the chain links of the second drawing chain.
• the coordination of the final caliber with respect to the workpieces can be even more precise, which accordingly increases operational safety when the workpieces are gripped and / or minimizes the risk of damage to the workpieces.
• the drawing recesses of the second drawing chain deviate from the drawing recesses of the first drawing chain or at least deviate perpendicular to the drawing line, the entire caliber range that can be covered by the respective set of drawing tools can be increased accordingly if the respective drawing chain Drawings are coordinated in a suitable manner.
• At least the pull recesses of the second pull chain can be arranged perpendicular to the pull line, deviating from the first pull recesses of the first pull chain, which, it is suspected, should reduce the overall wear, since changing the caliber causes different areas of the caterpillar train or the caterpillar tractor to be loaded.
• drawing recesses of the second drawing chain are each perpendicular to the drawing line or in relation to an intersecting line
• Draw plane are arranged next to each other, so that the drawing recesses of the second drawing chain can be aligned with the respective chain link optionally by moving the respective drawing tools perpendicular to the drawing line in relation to the drawing line, in order to change the caliber range accordingly between the two caliber ranges.
• this can be done with a directional component that deviates from the directional component with which the drawing tools and chain links of the first drawing chain are aligned in order to achieve the desired overall caliber.
• the material is not only redistributed perpendicular to the drawing line, but also an elongation of the workpiece, so that material is also redistributed along the drawing line.
• drawing machines are also known, for example for cables, in which the focus is only on transport or forming only perpendicular to the drawing direction, for example for redistribution of the individual filaments of a cable.
• the crawler pulling machine is particularly suitable because of the relatively large forming forces which can be applied thereby, in particular for forming processes in which a material redistribution occurs not only vertically but also along the drawing line.
• the present crawler pulling machines or the corresponding caliber changing processes are particularly suitable for pipes, rods or rods to be formed, preferably for metallic pipes, rods or rods to be formed accordingly.
• drawing tools of both drawing chains can each be aligned with the respective chain link perpendicular to the drawing line, which - as already explained above - the flexibility and / or the size of the entire caliber range, which can be covered thereby, increased accordingly.
• the two drawing recesses of the second of the two drawing chains for caliber areas are determined by the first and second caliber areas of the first of the two Pull chains differ, a large caliber range in particular can be provided by the respective set of pulling tools.
• a correspondingly high degree of flexibility or a correspondingly high overall caliber range can be achieved in particular if all of the drawing recesses in the first of the two drawing chains differ from the drawing recesses in the second of the two drawing chains.
• a pull plane in which the pull line lies can be assigned to the respective caterpillar train.
• the drawing level then also includes the drawing line.
• the drawing plane can be placed parallel to the plane in which this drawing chain rotates, at least in relation to one of the drawing chains. Any sprockets will then also be arranged parallel to this drawing plane.
• the associated drawing planes then meet in the drawing line and lie one above the other. However, if, for example, three pull chains are used, which are each arranged at an angle of 120 ° around the pull line, the pull planes also meet or intersect in the pull line without overlapping. Arrangements with multiple drawing levels, however, have proven to be structurally relatively complex and, in this respect, have proven to be relatively cost-intensive and to be expensive to operate.
• At least one sprocket and in particular two sprockets, which are likewise arranged parallel to the drawing plane and around which the drawing chains are guided, will accordingly preferably also be present per pull chain.
• the chain wheel or the chain wheels are aligned parallel to a drawing plane intersecting the drawing line, so that the respective drawing chains also run parallel to this drawing plane and preferably even circulate in this drawing plane.
• the Sprockets themselves may also have a more complex structure and may comprise, for example, a plurality of chainrings which are arranged parallel to one another with respect to the axes of the sprockets and which each engage in the pull chains or guide them accordingly.
• Alignment of the drawing tools and chain links of the drawing chains is preferably provided in order to change the caliber range accordingly between the first and the second caliber range, together with the sprocket or the sprockets, which is structurally particularly easy to implement.
• the latter applies in particular when the chain wheels are arranged on a chain carrier, which preferably also fulfills other management tasks, in particular for the respective pull chain.
• appropriate publishers in order to change the caliber range accordingly between the first and the second caliber range, undertake together with this chain carrier by the entire chain carrier being shifted accordingly.
• the crawler pulling machine has a die carrier which supports the
• Drawing die carries, and a chain carrier, which carries at least one of the chains or at least associated chain guides and is part of the crawler track itself.
• the chain carrier can preferably be displaceable perpendicularly to the drawing line by means of an axial drive for axially displacing the chain carrier, so that the associated drawing chain can be correspondingly displaced in relation to the drawing die carriers.
• Such an axial drive enables simple and targeted displacement of the respective chain links and thus also the associated drawing tools, in order in this way to be able to align the respective drawing recesses accordingly.
• the drawing tools can be arranged or designed on the chain links.
• the drawing chains comprise blocks
• it proves to be advantageous to arrange or design the drawing tools on the blocks of the drawing chain as already described for example in EP 2 197 601 B1 or in certain embodiments of WO 2006/002613 A1 or in the DE 10 2018 111 731 A1 is disclosed.
• separate drawing tools which are only attached to link plates of the drawing chains, as disclosed for example in JP 2 986 758 B2 or also certain exemplary embodiments of WO 2006/002613 A1, can also be provided.
• the drawing recesses can be formed in the blocks of the drawing chain or one of the drawing chains, since the chain links, and therefore also the blocks as chain links, are to be moved together with the drawing tools, so that a structural separation is not absolutely necessary.
• a separately designed tool holder which is provided or formed on the respective chain links, for example on the blocks, can be dispensed with, so that the respective chain links and the drawing tools, and possibly also the tool holder, as a structural unit or can be formed in one piece.
• the crawler pulling machine can also comprise several drawing dies, through which the caterpillar pull then successively pulls the corresponding workpiece.
• Figure 1 schematically shows a side view of a first crawler tractor
• Figure 2 is a schematic plan view of the first crawler tractor according to Figure 1 without
• FIGS. 1 and 2 shows a schematic plan view of the first crawler pulling machine according to FIGS. 1 and 2 without pulling chains and without idler roller chains in a second pulling tool alignment;
• FIG. 4 shows a section through the first crawler drawing machine according to FIGS. 1 to 3 in its first drawing tool alignment along the line IV-IV in FIG. 1;
• FIG. 5 shows the section according to FIG. 4 through the first crawler pulling machine according to FIGS.
• Figure 6 schematically shows a side view of a second crawler tractor
• FIG. 7 shows a schematic plan view of the second crawler pulling machine according to FIG. 6 without pull chains and without idler roller chains in a first pulling tool direction;
• FIG. 8 shows a schematic plan view of the second crawler pulling machine according to FIGS. 6 and 7 without pulling chains and without idler roller chains in a second pulling tool orientation
• FIG. 9 shows a section through the second crawler pulling machine according to FIGS. 6 to 8 in its first drawing tool alignment along the line IX-IX in FIG. 6;
• FIG. 10 shows a drawing tool arrangement with drawing recesses that are alternative to the drawing recesses of the embodiments according to FIGS. 1 to 9
• FIG. 11 shows a drawing tool arrangement with drawing recesses that are alternative to the drawing recesses in the configurations according to FIGS. 1 to 10;
• FIG. 12 shows a drawing tool arrangement with drawing recesses that are alternative to the drawing recesses in the configurations according to FIGS. 1 to 11;
• FIG. 13 shows a drawing tool arrangement with drawing recesses that are alternative to the drawing recesses in the configurations according to FIGS. 1 to 12.
• the crawler drawing machines 10 shown in the figures each comprise a drawing die 12 and a caterpillar track 13 arranged behind the drawing die 12 as viewed in a drawing direction 21 and serve to pull workpieces 11 in the drawing direction along a drawing line 20 through the drawing die 12.
• the crawler pulling machines 10 have a base plate 56, through which on the one hand a drawing die support 53 for carrying the drawing die 12 and on the other hand an eccentric support 52 are arranged in a fixed manner relative to one another.
• the base plate 46 may be dispensed with, as long as the eccentric support 52 and the drawing die support 53 can be placed in a sufficiently stable manner in relation to one another in another way, for example in that the corresponding assemblies are fastened directly in a floor or in another building unit are. It is understood here that in different embodiments, the base plate 56 cannot support the eccentric support 52 and the drawing die support 53 directly but possibly only indirectly.
• drawing die carrier 53 can adequately counteract the drawing forces which the drawing die 12 brings into the drawing die carrier 53 and which the drawing die carrier 53 must meet via the base plate 56
• drawing force stabilizers 55 are arranged on the side of the drawing die carrier, which as plate-like extensions stabilize the die carrier 53.
• the pulling force stabilizer 55 on the eccentric carrier 52 side extends to and even beyond the eccentric carrier 52 in order in this way to further stabilize the overall arrangement and in particular also to ensure stable support of the eccentric support 52 with respect to the drawing die support 53.
• the crawler tracks 13 each comprise two
• Drawing chains 14 which run parallel to a drawing plane 23.
• Each of the pull chains 14 is guided around two sprockets 15, the axes of which are oriented perpendicular to the drawing plane 23.
• further drawing chains which rotate accordingly, can be provided.
• the drawing planes 23 to be assigned to the respective drawing chains 14 also intersect in the drawing line 20, but this leads to a superimposition of these drawing planes 23 on the single drawing plane 23.
• a plane 25 can be defined perpendicular to the drawing plane 23, which plane also intersects the drawing line 20 and in principle represents the plane of symmetry with respect to which the two drawing chains 14 and their sprockets 15 are in principle arranged with respect to the drawing line 20.
• Each of the drawing chains 14 is acted upon by a pressing force at least in a gripping area 18 by means of a pressure bar 82, which has a component 22 directed towards the drawing line 20.
• the drawing die 12 can then have a shaping effect on the corresponding workpiece 11, with at least one during this shaping process
• Material distribution of the material from which the workpiece 11 is made takes place in a plane perpendicular to the drawing line 20, preferably even a redistribution along the drawing line 20, so that the workpiece is also stretched during the drawing process.
• the pull chains 14 of the exemplary embodiment shown in FIGS. 1 to 5 are designed as block-link chains and include blocks 17A, links 17B and bolts 19 as chain links.
• the pull chains 14 of the exemplary embodiment shown in FIGS. 6 to 9 are designed as block chains and only comprise blocks 17A and
• the bolts 19 each carry chain rollers 16, which can engage in sprocket rings of the sprockets 15 that are not separately numbered, so that the drawing chains are each guided around the sprockets 15 and can also be driven by them.
• the crawler train 13 of the exemplary embodiment shown in FIGS. 1 to 5 has a chain drive 54 for each pull chain 14, which engages the rear sprocket 15 in the pulling direction 21 and drives the respective pull chain 14 in this way.
• both chain wheels 15 of the pull chains 14 are each driven by a chain drive 54, which enables a somewhat more uniform application of the pulling forces required for pulling.
• the drawing tools 40 are each formed in the blocks 17A of the drawing chains 14.
• the drawing tools 40 and the blocks 17A and the tool holder 30 holding the drawing tools 40 on the chain links are formed in one piece.
• the drawing tools 40 in different embodiments from the blocks 17A, can also be designed as separate assemblies, as is well known from the prior art. However, this requires a somewhat increased construction effort, since the corresponding blocks must then be designed as tool holders 30 and corresponding holding devices must be provided on the tool holders 30 and / or on the drawing tools 40. On the other hand, this allows the drawing tools 40 to be changed if they should wear out.
• separate tool holders 30 can optionally be provided, which can then be provided or attached to chain links, for example to blocks, plates or pins of the corresponding pull chains 14, in order to appropriately pull tools 40 hold.
• chain links for example to blocks, plates or pins of the corresponding pull chains 14, in order to appropriately pull tools 40 hold.
• the drawing tools 40 of all the exemplary embodiments have at least two drawing recesses 41 on their sides of the respective drawing tool 40 which are arranged perpendicular to the drawing plane 23 and are directed towards the plane 25.
• the drawing recesses 41 of the respective drawing tool 40 are each intended for different caliber ranges, so that overall a comparatively large total caliber range can be covered by these drawing tools 40.
• the drawing recesses 41 are designed in their cross section such that when they are pressed against a workpiece 11 which is within the caliber range for which the corresponding drawing recess 41 is intended, they are sufficiently high with a non-positive or frictional effect Contact forces are applied so that the drawing chains 14 can pull the workpiece 11 through the drawing die 12 without the workpiece 11 being critically impaired, for example damaged or deformed. [73] These pressure forces are, as already explained above, by pressure bars
• the eccentrics 51 are mounted in the eccentric carrier 52 in order to be able to meet the corresponding pressing forces but also the corresponding drawing forces. It is understood that in different embodiments, instead of the eccentric 51, other devices, such as, for example, electromotive linear drives, possibly in combination with suitable gears, levers and / or guides, can be used to apply the required contact forces perpendicular to Apply level 25 or in the respective drawing levels 23. Accordingly, instead of the eccentric support 52, alternative suitable supports are used which are spatially related to the respective drawing die support 53 and which carry the corresponding devices and absorb the corresponding contact forces and, if appropriate, also the drawing forces.
• the pull chains 14 and the associated sprockets 15 are each arranged on chain carriers 50 which are supported by the eccentrics 51, this happening directly via the eccentrics 51 in the exemplary embodiment according to FIGS. 1 to 5 and the respective ones Chain carrier 50 also carry or form the pressure bar 82.
• the pressure bar 82 is designed as a separate assembly and is carried directly by the eccentrics 51 in order to apply the associated pressure forces there, while the associated pressure forces are then applied
• Chain carrier 50 is carried displaceably. It goes without saying that, depending on the specific requirements, the specific configuration of chain carrier 50 in relation to the pressure bar 82 and in relation to the eccentric 51 or other devices which apply the pressure forces can be adapted or exchanged.
• idler rollers 80 are provided in the exemplary embodiments according to FIGS. 1 to 9, which are each arranged in idler roller chains 81 and together with the respective pull chains 14 however, run past or run around the pressure bar 82 at a different running speed.
• the idler roller chains 81 are designed as link chains, on the other
• each of the idler rollers 80 are arranged, the tabs 84 of the idler roller chains 81 are arranged on both sides of the idler rollers 80.
• the idler roller chains 81 still carry guide disks 83, which are provided between the link plates 84 and the idler rollers 80 in this embodiment and which protrude beyond the track of the idler rollers 80.
• guide disks 83 are provided between the link plates 84 and the idler rollers 80 in this embodiment and which protrude beyond the track of the idler rollers 80.
• the pull chains 14 are guided with respect to the drawing plane 23 by the sprockets 15 and / or — optionally — external lateral guides not shown separately here, which are provided, for example, on the chain carriers 50 or even completely independently thereof.
• Such a configuration makes it possible to pull chains 14 perpendicular to the respective drawing plane 23 with respect to idler rollers 80 or with respect to the pressure beam
• corresponding guides such as those used as idler roller guides 85, also on the chain links of the pull chain 14 or on the tool holders 30 or the die tools 40 the idler rollers 80 can be provided to ensure a corresponding lateral guidance with respect to the drawing plane 23.
• the guide according to the exemplary embodiment in FIGS. 1 to 5 can also be provided here, and vice versa.
• the pressure bar 82 carries the idler roller chain 81 as a separate assembly, serves as a guide bar both for the idler roller chain 81 and for the application of the contact forces and is directly supported by the eccentrics 51, which in turn in the Eccentric support 52 are mounted.
• Exemplary embodiments each have at least two drawing recesses 41, which are offset parallel to the drawing line 20 or perpendicular to the drawing plane 23 and can each be optionally aligned with respect to the drawing line 20.
• this can be done together with the chain supports 50 by appropriate displacements of the pressure bars 82, while in the exemplary embodiments shown in FIGS. 6 to 9 this can be done by moving the chain wheels 15 together with the chain supports 50 or with the side guides not shown separately.
• the exemplary embodiments in FIGS. 1 to 9 have axial drives 60, which in the exemplary embodiment in FIGS. 1 to 5 are designed as fly hydraulics 61 and in the exemplary embodiment in FIGS. 6 to 9 as linear motors 62. It goes without saying that the type of drive can also be replaced here by other suitable drives or by one another.
• the hydraulics 61 is formed directly in the eccentrics 51 and the eccentric supports 52, so that no separate assemblies are required here and the eccentric 51 itself can be shifted accordingly by the hydraulics 61. It goes without saying that in a different embodiment, a separate axial drive 60 can also be provided, which — if appropriate — also axially displaces the entire eccentric carrier 52 or an assembly that carries the assembly that applies the contact forces.
• the drawing tools 40 of both drawing chains can be aligned together with the respective chain link perpendicular to the drawing line 20 or perpendicular to the drawing plane 23. Depending on the specific embodiments, however, it may be sufficient if only one of the two pull chains 14 satisfies this condition.
• drawing recesses 41 of the two drawing chains 14 are formed symmetrically with respect to the plane 25 directed perpendicular to the drawing plane 23, so that the drawing tools with identical directional components with respect to the drawing plane 23 are shifted when the caliber range is to be changed.
• the drawing recesses 41 of the respective drawing tools 40 each have a different cross section.
• the drawing recesses can also be arranged with respect to the plane 25 not mirror-symmetrically but line-symmetrically to the drawing line 20, as this is illustrated by way of example using the exemplary embodiment according to FIG. 11.
• the drawing tools 40 can then be displaced in a manner similar to FIGS. 1 lb and 1 lc in order to align the two caliber areas in each case in a manner corresponding to the drawing line 20.
• drawing recesses 41 in each case differently and thus to determine them for different caliber ranges, as is shown in the specific exemplary embodiment according to FIG. 11.
• different drawing recesses with various caliber ranges can then be made in relation to the drawing line 20, on which the workpiece 11 is then drawn.
• two different drawing recesses 41 of the second of the two drawing chains 14 are determined for the first caliber range, for which the first drawing recesses 41 of the at least one of the two drawing chains 14 are intended.
• drawing tools 40 and the respective chain links of the second drawing chain 14 are aligned with a directional component that deviates from the directional component with which the drawing tools 40 and chain links of the first drawing chain 14 are aligned, such as, for example immediately apparent when the arrangement according to FIGS. 11b and 11c changes.
• a directional component that deviates from the directional component with which the drawing tools 40 and chain links of the first drawing chain 14 are aligned.
• both or all of the pull chains 14 need not have a plurality of pull recesses 41. Rather, it is also conceivable that different numbers can be provided here and in particular one of the pull chains 14 can also have only one pull recess 41.
• the drawing recesses 41 shown in FIGS. 12 and 13 are particularly suitable for pipes, with the drawing tools 40 ultimately also being able to be used here together or in one piece with the chain links or else separately. [95] In the drawing tools 40 shown in FIG. 13, the drawing recesses are

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Metal Extraction Processes (AREA)
• Press Drives And Press Lines (AREA)

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• 2019
  • 2019-03-13 DE DE102019106362.0A patent/DE102019106362A1/de not_active Withdrawn
  • 2019-12-02 MX MX2021008117A patent/MX2021008117A/es unknown
  • 2019-12-02 WO PCT/DE2019/101031 patent/WO2020141005A1/de active Search and Examination
  • 2019-12-02 US US17/420,269 patent/US11786950B2/en active Active
  • 2019-12-02 JP JP2021539080A patent/JP2022516925A/ja active Pending
  • 2019-12-02 KR KR1020217024720A patent/KR20210112354A/ko active Search and Examination
  • 2019-12-02 EP EP19823898.2A patent/EP3906123A1/de active Pending
  • 2019-12-02 BR BR112021013300A patent/BR112021013300A2/pt active Search and Examination
  • 2019-12-02 DE DE112019006557.2T patent/DE112019006557A5/de active Pending

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