EP1975293B1 - Heald bar made of sheet metal - Google Patents

Heald bar made of sheet metal Download PDF

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Publication number
EP1975293B1
EP1975293B1 EP07006140A EP07006140A EP1975293B1 EP 1975293 B1 EP1975293 B1 EP 1975293B1 EP 07006140 A EP07006140 A EP 07006140A EP 07006140 A EP07006140 A EP 07006140A EP 1975293 B1 EP1975293 B1 EP 1975293B1
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EP
European Patent Office
Prior art keywords
material thickness
zone
bending
heald bar
bar according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP07006140A
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German (de)
French (fr)
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EP1975293A1 (en
Inventor
Johannes Dr. Bruske
Robert Emele
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Groz Beckert KG
Original Assignee
Groz Beckert KG
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Filing date
Publication date
Application filed by Groz Beckert KG filed Critical Groz Beckert KG
Priority to EP07006140A priority Critical patent/EP1975293B1/en
Priority to JP2008077492A priority patent/JP2008238276A/en
Priority to CN2008100905060A priority patent/CN101275325B/en
Priority to US12/078,023 priority patent/US7624764B2/en
Publication of EP1975293A1 publication Critical patent/EP1975293A1/en
Application granted granted Critical
Publication of EP1975293B1 publication Critical patent/EP1975293B1/en
Expired - Fee Related legal-status Critical Current
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C9/00—Healds; Heald frames
    • D03C9/06—Heald frames
    • D03C9/0608—Construction of frame parts
    • D03C9/0616—Horizontal upper or lower rods
    • D03C9/0633—Heald bars or their connection to other frame parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/08—Bending by altering the thickness of part of the cross-section of the work

Definitions

  • the invention relates to a heddle support rail for heddle shafts.
  • Eg reveals the German utility model DE 1887297 U Litzentrack rails, which consist of flat material with an angled edge.
  • Litzentragschienen contribute to the weight of the heald frames.
  • One way to reduce weight is the production of steel litzentragschienen.
  • the edge is like angled, as can be seen from the above utility model.
  • the forming bending edge must have a high strength.
  • a shaft rod makes separate Litzentragschienen dispensable.
  • the integrated design complicates the respective independent optimization of the shape and material properties of the shaft rod and the shaft stave.
  • a heddle support rail according to the preamble of claim 1 is made EP-A-0504101 known.
  • the heddle support rail according to the invention has an elongate body made of sheet metal, the edge region of which is bent along a bending line extending in its longitudinal direction.
  • the edge region is preferably bent or folded by about 180 °. From the forming bending region then extend two preferably initially substantially straight leg away. Preferably, these are oriented approximately parallel to one another. They lie flat on each other or close with each other a gap, which is preferably narrower than the sheet thickness.
  • the (sheet metal) body is designed to form the bending region with a length extending along the bending line Zone of reduced material thickness provided.
  • a reduced material thickness is provided precisely in that region which is subject to the highest stress in use, namely the upper or lower bending edge of the heddle support rail.
  • the heddle support rail is preferably already made of relatively thin sheet of eg 1 mm or eg only 0.5 mm.
  • the reduction of the material thickness leads to an improvement of the material structure in the bending area with a result in increased fatigue strength.
  • the zone of reduced material thickness can be formed before or during the bending process of the heddle support rail.
  • the reduction of the material thickness in the bending area can be done by a rolling process. In principle, however, machining operations, such as grinding processes are not excluded. However, it is preferred to reduce the material thickness by material displacement. This can contribute to increased strain hardening of the material in the bending area.
  • the reduction of the material thickness is achieved by forming a groove with a rounded cross-section. That is, before or during the bending process for forming the bending region, an edge-free recess is introduced into the piece of sheet metal from which the heddle support rail is manufactured.
  • the formation of the zone with reduced material thickness is preferably carried out in a combined rolling and roll forming process.
  • the associated device has a plurality of rollers and rollers, on the one hand form the zone of reduced material thickness by material displacement and on the other hand perform the desired bending operation.
  • the zone of reduced material thickness occupies the entire bending area or even extends into one or both subsequent legs. If the region of reduced wall thickness has been produced in this case by material displacement, the entire bending region may be subjected to increased work hardening and thus have a higher load capacity than without the inventive measure.
  • the reduction of the material thickness in the region of the bending zone allows the formation of very small rounding radii and thus the production of particularly slender heddle rails. Accordingly, the end loops of connected strands can be made narrow and slender, which contributes to the weight reduction of the entire heald.
  • a heald support rail 1 is illustrated which may be attached to a heald to receive healds.
  • the heddle support rail 1 is formed as a sheet metal bent part. It consists for example of a strip-shaped elongated body 2 made of sheet metal, eg steel sheet, for example of CrNi 1.4310 with a thickness d of eg 1mm.
  • the body 2 is formed in an elongated strip-shaped with respect to a direction 3, which can also be considered as a longitudinal direction.
  • the heddle support rail can be cranked one or more times in order, for example, to form a fastening section 5.
  • the portion 6 and the edge 8 belong to a portion of the body 2 with a uniform material thickness.
  • the term "material thickness” refers to the material thickness d, as in FIG. 3 is indicated.
  • the portion 6 and the edge 8 are seamlessly connected in one piece with each other via a bending portion 10, which represents a 180 ° bend.
  • the bending region 10 forms a U-shape with the legs formed by the section 6 and the edge 8.
  • the bending region 10 is formed in a zone 11 which has a reduced material thickness. Zone 11 is off FIG. 3 can be seen and is formed for example by a parallel to the direction 3 extending groove.
  • zone 11 is the material thickness d1, for example, reduced by one or a few tenths of a millimeter compared to the other material thickness.
  • FIG. 2 shows an elongated inner channel 12, which is formed substantially smooth and rounded.
  • the corresponding wall 13 is substantially free of cracks.
  • registered width W of the channel 12 is preferably slightly larger than the distance a between the facing flat sides of the portion 6 and the edge 8.
  • the distance a may be substantially zero, when the portion 6 and the edge 8 lie flat on each other. However, it preferably has a value other than zero, which is preferably smaller than the material thickness d of the section 6 or edge 8.
  • a gap 14 is preferably formed between the section 6 and the leg 8 as a parallel gap.
  • the section 6 and the edge 8 are preferably flat.
  • the manufacture of the heddle support rail 1 can in principle be carried out by different methods. Common to this method is that it is assumed that a sheet metal part, which is bent in the course of the process in the desired shape. Before or during the bending process is on the sheet metal part of FIG. 3 apparent zone 11 formed with reduced wall thickness d1.
  • This depression can be effected, for example, by grinding in a groove 15 running in the direction 3, the depth of which is, for example, 0.1 mm to 0.3 mm or fixed to another suitable value.
  • the depth of the groove 15 is, for example, one tenth to one third of the material thickness d.
  • the shape of the groove 15 corresponds to a flat trough without sharp edges. It may also be semi-circular, bell-shaped or similarly shaped in cross-section.
  • the groove 15 is produced in a non-cutting shaping operation, for example a rolling process, in which the groove 15 is formed by material displacement.
  • FIG. 4 shows this process in implementation by means of two profiled rollers 16, 17 which engage opposite flat sides 18, 19 of the sheet metal part.
  • the groove 15 is formed on the flat side 19 while no depression is formed on the flat side 18.
  • the groove 15 or other depression for forming the zone 11 with reduced material thickness is thus asymmetric on the sheet metal part, that is mounted only on one side. She is, as well FIG. 2 shows, provided on that flat side 19, which ultimately also limits the gap 14 and the channel 12.
  • the groove 15 is preferably arranged on the inside of the bending region 10.
  • FIG. 4 further illustrates the formation of the heddle support rail 1 in a combined machining operation, in which on the one hand with the rollers 16, 18 by material displacement, the zone 11 is generated, and in the other hand, by further rollers 20, 21 and other rollers, not shown, the edge 8 by 180 ° is bent over to the FIG. 2 to obtain an apparent form.
  • the finished Litzentragschiene 1 has for receiving the Litzenendösen a narrow longitudinally and transversely curved to Litzenauflage Structure 22 on which the metal of the sheet metal part is slightly stretched. In contrast, the metal on the wall 13 is slightly compressed. Due to the reduction of the wall thickness by material displacement by means of the rollers 16, 17 and the subsequent bending this zone is largely solidified cold, with little cracking occurs. Thus, a heddle support rail 1 is obtained which, in particular in the area of its strand support surface 22 and correspondingly also on its in FIG. 1 lower strand support surface 23 has a cold solidified low-crack surface. This concept allows the production of Litzentragschienen from relatively thin sheets, on the one hand a high load capacity and on the other hand a low weight can be achieved.
  • the heddle support rail according to the invention for heddle shafts consists of a bent sheet metal part with unbent legs 8, 9, wherein in the bending zones before or during the bending process, the material thickness is reduced.
  • the material thickness in the bending region can again increase somewhat during the bending process and if necessary also return to its original value. In any case, an increase in material thickness beyond the original sheet thickness is avoided during the bending process.

Description

Die Erfindung betrifft eine Litzentragschiene für Webschäfte.The invention relates to a heddle support rail for heddle shafts.

Es existieren verschiedene Technologien zur Herstellung von Webschäften und insbesondere deren Litzentragschienen.There are various technologies for the production of heddles and in particular their Litzentragschienen.

Z.B. offenbart das deutsche Gebrauchsmuster DE 1887297 U Litzentragschienen, die aus Flachmaterial mit einer abgewinkelten Kante bestehen.Eg reveals the German utility model DE 1887297 U Litzentrack rails, which consist of flat material with an angled edge.

Litzentragschienen tragen zum Gewicht der Webschäfte bei. Ein Weg zur Gewichtsreduzierung ist die Herstellung von Litzentragschienen aus Blech. Beim Auf- und Abbewegen der Webschäfte schlagen die Litzen mit ihren Endösen an der oberen und unteren Kante der Litzentragschiene an. Zur Verstärkung der Kante wird sie gerne abgewinkelt, wie z.B. aus dem obigen Gebrauchsmuster ersichtlich.Litzentragschienen contribute to the weight of the heald frames. One way to reduce weight is the production of steel litzentragschienen. When moving up and down the heald heal the strands with their end loops on the upper and lower edge of the heald support rail. For reinforcement The edge is like angled, as can be seen from the above utility model.

Die sich ausbildende Biegekante muss eine hohe Festigkeit aufweisen.The forming bending edge must have a high strength.

Außerdem zeigt die CH 464 112 einen Schaftstab, der als Blechbiegeteil ausgebildet ist und am Rand einen u-förmig umgebogenen Bereich zur Aufnahme von Litzenendösen aufweist. Ein solcher Schaftstab macht gesonderte Litzentragschienen entbehrlich. Allerdings erschwert die integrierte Bauweise die jeweilige unabhängige Optimierung von Form- und Materialeigenschaften des Schaftstabs und der Litzentragschiene.In addition, the shows CH 464 112 a shaft rod which is formed as a sheet metal bent part and at the edge has a U-shaped bent portion for receiving Litzenendösen. Such a shaft rod makes separate Litzentragschienen dispensable. However, the integrated design complicates the respective independent optimization of the shape and material properties of the shaft rod and the shaft stave.

Eine Litzentragschiene gemäß den Oberbegriff des Anspruchs 1 ist aus EP-A-0504101 bekannt.A heddle support rail according to the preamble of claim 1 is made EP-A-0504101 known.

Es wird nach einer Möglichkeit gesucht, möglichst robuste Litzentragschienen aus Blech zu fertigen.It is being sought for a way to produce as robust as Litzentragschienen made of sheet metal.

Diese Aufgabe wird mit der Litzentragschiene nach Anspruch 1 gelöst:This object is achieved with the heddle support rail according to claim 1:

Die erfindungsgemäße Litzentragschiene weist einen aus Blech bestehenden länglichen Körper auf, dessen Randbereich entlang einer sich in seiner Längsrichtung erstreckenden Biegelinie umgebogen ist. Der Randbereich ist vorzugsweise um etwa 180° umgebogen bzw. gefaltet. Von dem sich ausbildenden Biegebereich erstrecken sich dann zwei vorzugsweise zunächst im Wesentlichen gerade Schenkel weg. Vorzugsweise sind diese etwa parallel zueinander orientiert. Sie liegen flach aufeinander auf oder schließen miteinander einen Spalt ein, der vorzugsweise enger ist als die Blechdicke.The heddle support rail according to the invention has an elongate body made of sheet metal, the edge region of which is bent along a bending line extending in its longitudinal direction. The edge region is preferably bent or folded by about 180 °. From the forming bending region then extend two preferably initially substantially straight leg away. Preferably, these are oriented approximately parallel to one another. They lie flat on each other or close with each other a gap, which is preferably narrower than the sheet thickness.

Erfindungsgemäß ist der (Blech-)Körper zur Ausbildung des Biegebereichs mit einer sich längs der Biegelinie erstreckenden Zone verminderter Materialstärke versehen. Dies bedeutet, dass gerade in demjenigen Bereich, der in Gebrauch der höchsten Beanspruchung unterliegt, nämlich der oberen bzw. unteren Biegekante der Litzentragschiene eine verminderte Materialstärke vorgesehen wird. Dies obwohl die Litzentragschiene vorzugsweise bereits aus relativ dünnem Blech von z.B. 1 mm oder z.B. lediglich 0,5 mm gefertigt ist. Die Reduktion der Materialstärke führt jedoch zu einer Verbesserung der Materialstruktur im Biegebereich mit einer im Ergebnis erhöhten Dauerschwingfestigkeit.According to the invention, the (sheet metal) body is designed to form the bending region with a length extending along the bending line Zone of reduced material thickness provided. This means that a reduced material thickness is provided precisely in that region which is subject to the highest stress in use, namely the upper or lower bending edge of the heddle support rail. This although the heddle support rail is preferably already made of relatively thin sheet of eg 1 mm or eg only 0.5 mm. However, the reduction of the material thickness leads to an improvement of the material structure in the bending area with a result in increased fatigue strength.

Die Zone verminderter Materialstärke kann vor oder während des Biegevorgangs der Litzentragschiene ausgebildet werden. Beispielsweise kann die Reduktion der Materialstärke im Biegebereich durch einen Walzvorgang erfolgen. Prinzipiell sind jedoch auch spanende Bearbeitungsvorgänge, wie beispielsweise Schleifprozesse nicht ausgeschlossen. Es wird jedoch bevorzugt, die Materialstärke durch Materialverdrängung zu reduzieren. Dies kann zu einer erhöhten Kaltverfestigung des Materials im Biegebereich beitragen.The zone of reduced material thickness can be formed before or during the bending process of the heddle support rail. For example, the reduction of the material thickness in the bending area can be done by a rolling process. In principle, however, machining operations, such as grinding processes are not excluded. However, it is preferred to reduce the material thickness by material displacement. This can contribute to increased strain hardening of the material in the bending area.

Vorzugsweise wird die Verminderung der Materialstärke durch Ausbildung einer Rille mit gerundetem Querschnitt erreicht. D.h. vor oder während des Biegevorgangs zur Ausbildung des Biegebereichs wird in das Blechstück, aus dem die Litzentragschiene gefertigt wird, eine kantenfreie Ausnehmung eingebracht. Die Ausbildung der Zone mit verminderter Materialstärke erfolgt vorzugsweise in einem kombinierten Walz- und Rollformvorgang. Die zugeordnete Vorrichtung weist mehrere Walzen und Rollen auf, die einerseits durch Materialverdrängung die Zone verminderter Materialstärke ausbilden und andererseits den gewünschten Biegevorgang durchführen.Preferably, the reduction of the material thickness is achieved by forming a groove with a rounded cross-section. That is, before or during the bending process for forming the bending region, an edge-free recess is introduced into the piece of sheet metal from which the heddle support rail is manufactured. The formation of the zone with reduced material thickness is preferably carried out in a combined rolling and roll forming process. The associated device has a plurality of rollers and rollers, on the one hand form the zone of reduced material thickness by material displacement and on the other hand perform the desired bending operation.

Bei einer bevorzugten Ausführungsform nimmt die Zone verminderter Materialstärke den gesamten Biegebereich ein oder erstreckt sich sogar in einen oder beide sich anschlie-ßende Schenkel hinein. Wenn der Bereich verminderter Wandstärke in diesem Fall durch Materialverdrängung erzeugt worden ist, kann der gesamte Biegebereich einer erhöhten Kaltverfestigung unterliegen und somit eine höhere Belastbarkeit aufweisen als ohne die erfinderische Maßnahme.In a preferred embodiment, the zone of reduced material thickness occupies the entire bending area or even extends into one or both subsequent legs. If the region of reduced wall thickness has been produced in this case by material displacement, the entire bending region may be subjected to increased work hardening and thus have a higher load capacity than without the inventive measure.

Des Weiteren ermöglicht die Reduktion der Materialstärke im Bereich der Biegezone die Ausbildung sehr geringer Rundungsradien und somit die Herstellung besonders schlanker Litzentragschienen. Entsprechend können die Endösen von angeschlossenen Litzen schmal und schlank ausgebildet werden, was zur Gewichtsreduktion des gesamten Webschafts beiträgt.Furthermore, the reduction of the material thickness in the region of the bending zone allows the formation of very small rounding radii and thus the production of particularly slender heddle rails. Accordingly, the end loops of connected strands can be made narrow and slender, which contributes to the weight reduction of the entire heald.

Weitere Einzelheiten von Ausführungsformen der Erfindung ergeben sich aus der Zeichnung, der Beschreibung oder Ansprüchen. Die Zeichnung und die Beschreibung beschränken sich auf die Darstellung wesentlicher Aspekte der Erfindung und sonstiger Gegebenheiten. Der Fachmann entnimmt der Zeichnung über die Beschreibung hinaus weitere Einzelheiten zur Ergänzung der Beschreibung.Further details of embodiments of the invention will become apparent from the drawings, the description or claims. The drawing and the description are limited to the presentation of essential aspects of the invention and other conditions. The skilled artisan will take the drawing beyond the description, further details to supplement the description.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung veranschaulicht. Es zeigen:

Figur 1
eine erfindungsgemäße Litzentragschiene in perspektivischer Übersichtsdarstellung,
Figur 2
die Litzentragschiene nach Figur 1 in einer ausschnittsweisen Querschnittsansicht,
Figur 3
verschiedene Materialstärken an der Litzentragschiene vor ihrer Fertigstellung,
Figur 4
die Litzentragschiene während ihrer Herstellung in ausschnittsweiser schematischer Darstellung.
In the drawing, an embodiment of the invention is illustrated. Show it:
FIG. 1
an inventive Litzentragschiene in a perspective overview,
FIG. 2
the heald track after FIG. 1 in a fragmentary cross-sectional view,
FIG. 3
different material thicknesses on the heddle support rail before its completion,
FIG. 4
the heddle support rail during its production in a fragmentary schematic representation.

In Figur 1 ist eine Litzentragschiene 1 veranschaulicht, die an einem Webschaft angebracht sein kann, um Weblitzen aufzunehmen. Die Litzentragschiene 1 ist als Blechbiegeteil ausgebildet. Sie besteht z.B. aus einem streifenförmigen länglichen Körper 2 aus Blech, z.B. Stahlblech, z.B. aus CrNi 1.4310 mit einer Dicke d von z.B. 1mm. Der Körper 2 ist bezüglich einer Richtung 3, die auch als Längsrichtung angesehen werden kann, länglich streifenförmig ausgebildet. In einem mittleren streifenförmigen Bereich 4 kann die Litzentragschiene ein- oder mehrfach gekröpft sein, um z.B. einen Befestigungsabschnitt 5 auszubilden. Von diesem erstrecken sich z.B. nach zwei voneinander weg weisenden Richtungen Abschnitte 6, 7 in Form von Schenkeln mit umgefalteten zueinander parallelen streifenförmigen Rändern 8, 9 bzw. Schenkeln Die Abschnitte 6, 7 und Ränder 8, 9 können spiegelsymmetrisch zueinander angeordnet und/oder ausgebildet sein. Die Ausbildung wird nachfolgend genauer anhand des Abschnitts 6 und des Rands 8 unter Bezugnahme auf Figur 2 beschrieben. Diese Beschreibung gilt entsprechend für den Abschnitt 7 und den Rand 9.In FIG. 1 a heald support rail 1 is illustrated which may be attached to a heald to receive healds. The heddle support rail 1 is formed as a sheet metal bent part. It consists for example of a strip-shaped elongated body 2 made of sheet metal, eg steel sheet, for example of CrNi 1.4310 with a thickness d of eg 1mm. The body 2 is formed in an elongated strip-shaped with respect to a direction 3, which can also be considered as a longitudinal direction. In a central strip-shaped region 4, the heddle support rail can be cranked one or more times in order, for example, to form a fastening section 5. From this extend, for example, two directions pointing away from each other sections 6, 7 in the form of legs with folded parallel strip-shaped edges 8, 9 or legs The sections 6, 7 and edges 8, 9 can be arranged mirror-symmetrically to each other and / or formed , The embodiment will be described in more detail below with reference to the section 6 and the edge 8 with reference to FIG FIG. 2 described. This description applies correspondingly to section 7 and the edge 9.

Der Abschnitt 6 und der Rand 8 gehören zu einem Abschnitt des Körpers 2 mit einheitlicher Materialstärke. Der Begriff "Materialstärke" bezeichnet dabei die Materialdicke d, wie sie in Figur 3 angedeutet ist. Der Abschnitt 6 und der Rand 8 sind unter einander nahtlos einstückig über einen Biegebereich 10 verbunden, der eine 180°-Biegung darstellt. Insgesamt bildet der Biegebereich 10 mit den durch den Abschnitt 6 und den Rand 8 gebildeten Schenkeln eine U-Form. Der Biegebereich 10 ist in einer Zone 11 ausgebildet, die eine verminderte Materialstärke aufweist. Die Zone 11 ist aus Figur 3 ersichtlich und wird beispielsweise durch eine parallel zu der Richtung 3 verlaufende Rille gebildet. In der Zone 11 ist die Materialstärke d1 beispielsweise um einen oder wenige Zehntel Millimeter im Vergleich zu der sonstigen Materialstärke reduziert.The portion 6 and the edge 8 belong to a portion of the body 2 with a uniform material thickness. The term "material thickness" refers to the material thickness d, as in FIG. 3 is indicated. The portion 6 and the edge 8 are seamlessly connected in one piece with each other via a bending portion 10, which represents a 180 ° bend. Overall, the bending region 10 forms a U-shape with the legs formed by the section 6 and the edge 8. The bending region 10 is formed in a zone 11 which has a reduced material thickness. Zone 11 is off FIG. 3 can be seen and is formed for example by a parallel to the direction 3 extending groove. In zone 11 is the material thickness d1, for example, reduced by one or a few tenths of a millimeter compared to the other material thickness.

Durch die Reduktion der Materialstärke in der Zone 11 umschließt der den Abschnitt 6 und den Rand 8 verbindende halbkreisförmig gebogene Teil der Litzentragschiene, wie Figur 2 zeigt, einen länglichen inneren Kanal 12, der im Wesentlichen glatt und gerundet ausgebildet ist. Die entsprechende Wandung 13 ist im Wesentlichen rissfrei. Die in Figur 2 eingetragene Weite W des Kanals 12 ist vorzugsweise etwas größer als der Abstand a zwischen den aufeinander zuweisenden Flachseiten des Abschnitts 6 und des Rands 8. Der Abstand a kann im Wesentlichen Null sein, wenn der Abschnitt 6 und der Rand 8 flach aufeinander liegen. Vorzugsweise hat er jedoch einen von Null verschiedenen Wert, der vorzugsweise kleiner ist als die Materialstärke d des Abschnitts 6 oder Rands 8. Somit ist zwischen dem Abschnitt 6 und dem Schenkel 8 ein Spalt 14 vorzugsweise als Parallelspalt ausgebildet. Der Abschnitt 6 und der Rand 8 sind vorzugsweise eben ausgebildet.By reducing the material thickness in the zone 11 enclosing the section 6 and the edge 8 connecting semicircular curved portion of the heddle support rail, such as FIG. 2 shows an elongated inner channel 12, which is formed substantially smooth and rounded. The corresponding wall 13 is substantially free of cracks. In the FIG. 2 registered width W of the channel 12 is preferably slightly larger than the distance a between the facing flat sides of the portion 6 and the edge 8. The distance a may be substantially zero, when the portion 6 and the edge 8 lie flat on each other. However, it preferably has a value other than zero, which is preferably smaller than the material thickness d of the section 6 or edge 8. Thus, a gap 14 is preferably formed between the section 6 and the leg 8 as a parallel gap. The section 6 and the edge 8 are preferably flat.

Die Herstellung der Litzentragschiene 1 kann prinzipiell nach unterschiedlichen Verfahren erfolgen. Gemeinsam ist diesen Verfahren, dass von einem Blechteil ausgegangen wird, das im Verlaufe des Verfahrens in die gewünschte Form gebogen wird. Vor oder während des Biegevorgangs wird an dem Blechteil die aus Figur 3 ersichtliche Zone 11 mit verminderter Wandstärke d1 ausgebildet. Diese Vertiefung kann beispielsweise durch Einschleifen einer in der Richtung 3 verlaufenden Rille 15 erfolgen, deren Tiefe beispielsweise 0,1 mm bis 0,3 mm beträgt oder auf einen anderen geeigneten Wert festgelegt ist. Die Tiefe der Rille 15 ist beispielsweise ein Zehntel bis ein Drittel der Materialstärke d. Die Form der Rille 15 entspricht der einer flachen Mulde ohne scharfe Kanten. Sie kann im Querschnitt auch halbkreisförmig, glockenförmig oder ähnlich geformt sein.The manufacture of the heddle support rail 1 can in principle be carried out by different methods. Common to this method is that it is assumed that a sheet metal part, which is bent in the course of the process in the desired shape. Before or during the bending process is on the sheet metal part of FIG. 3 apparent zone 11 formed with reduced wall thickness d1. This depression can be effected, for example, by grinding in a groove 15 running in the direction 3, the depth of which is, for example, 0.1 mm to 0.3 mm or fixed to another suitable value. The depth of the groove 15 is, for example, one tenth to one third of the material thickness d. The shape of the groove 15 corresponds to a flat trough without sharp edges. It may also be semi-circular, bell-shaped or similarly shaped in cross-section.

Vorzugsweise wird die Rille 15 in einem spanlosen Formgebungsvorgang, beispielsweise einem Walzprozess, erzeugt, bei dem die Rille 15 durch Materialverdrängung entsteht. Figur 4 zeigt diesen Vorgang in Durchführung mit Hilfe zweier profilierter Walzen 16, 17, die an gegenüber liegenden Flachseiten 18, 19 des Blechteils angreifen. Dabei entsteht die Rille 15 an der Flachseite 19 während an der Flachseite 18 keine Vertiefung entsteht. Die Rille 15 oder sonstige Vertiefung zur Ausbildung der Zone 11 mit verminderter Materialstärke ist somit an dem Blechteil asymmetrisch, d.h. nur einseitig angebracht. Sie ist, wie auch Figur 2 zeigt, an derjenigen Flachseite 19 vorgesehen, die letztlich auch den Spalt 14 und den Kanal 12 begrenzt. Mit anderen Worten, die Rille 15 ist vorzugsweise an der Innenseite des Biegebereichs 10 angeordnet. Durch das Einwalzen der Rille 15 an der Innenseite der entstehenden Biegung während des Biegeprozesses wird die Ausbildung von Zugspannungsrissen an der Außenseite des Biegebereichs und die Ausbildung von Stauchungsrissen an der Innenseite des Biegebereichs vermieden.Preferably, the groove 15 is produced in a non-cutting shaping operation, for example a rolling process, in which the groove 15 is formed by material displacement. FIG. 4 shows this process in implementation by means of two profiled rollers 16, 17 which engage opposite flat sides 18, 19 of the sheet metal part. In this case, the groove 15 is formed on the flat side 19 while no depression is formed on the flat side 18. The groove 15 or other depression for forming the zone 11 with reduced material thickness is thus asymmetric on the sheet metal part, that is mounted only on one side. She is, as well FIG. 2 shows, provided on that flat side 19, which ultimately also limits the gap 14 and the channel 12. In other words, the groove 15 is preferably arranged on the inside of the bending region 10. By rolling the groove 15 on the inside of the resulting bend during the bending process, the formation of tensile stress cracks on the outside of the bending region and the formation of compression cracks on the inside of the bending region is avoided.

Figur 4 veranschaulicht des Weiteren die Ausbildung der Litzentragschiene 1 in einem kombinierten Bearbeitungsvorgang, bei dem einerseits mit den Walzen 16, 18 durch Materialverdrängung die Zone 11 erzeugt wird, und in dem andererseits durch weitere Walzen 20, 21 sowie weitere nicht dargestellte Walzen der Rand 8 um 180° umgebogen wird, um die aus Figur 2 ersichtliche Form zu erhalten. FIG. 4 further illustrates the formation of the heddle support rail 1 in a combined machining operation, in which on the one hand with the rollers 16, 18 by material displacement, the zone 11 is generated, and in the other hand, by further rollers 20, 21 and other rollers, not shown, the edge 8 by 180 ° is bent over to the FIG. 2 to obtain an apparent form.

Die fertig gestellte Litzentragschiene 1 weist zur Aufnahme der Litzenendösen eine schmale längs verlaufende und quer dazu gekrümmte Litzenauflagefläche 22 auf, an der das Metall des Blechteils etwas gedehnt ist. Dagegen ist das Metall an der Wandung 13 etwas gestaucht. Aufgrund der Reduktion der Wandstärke durch Materialverdrängung mittels der Walzen 16, 17 und der nachfolgenden Biegung ist diese Zone weitgehend kalt verfestigt, wobei nur geringe Rissbildung auftritt. Damit wird eine Litzentragschiene 1 erhalten, die insbesondere im Bereich ihrer Litzenauflagefläche 22 und entsprechend auch an ihrer in Figur 1 unteren Litzenauflagefläche 23 eine kalt verfestigte rissarme Oberfläche aufweist. Dieses Konzept gestattet die Herstellung von Litzentragschienen aus relativ dünnen Blechen, wobei einerseits eine hohe Belastbarkeit und andererseits ein geringes Gewicht erreicht werden.The finished Litzentragschiene 1 has for receiving the Litzenendösen a narrow longitudinally and transversely curved to Litzenauflagefläche 22 on which the metal of the sheet metal part is slightly stretched. In contrast, the metal on the wall 13 is slightly compressed. Due to the reduction of the wall thickness by material displacement by means of the rollers 16, 17 and the subsequent bending this zone is largely solidified cold, with little cracking occurs. Thus, a heddle support rail 1 is obtained which, in particular in the area of its strand support surface 22 and correspondingly also on its in FIG. 1 lower strand support surface 23 has a cold solidified low-crack surface. This concept allows the production of Litzentragschienen from relatively thin sheets, on the one hand a high load capacity and on the other hand a low weight can be achieved.

Die erfindungsgemäße Litzentragschiene für Webschäfte besteht aus einem Blechbiegeteil mit ungebogenen Schenkeln 8, 9, wobei in den Biegezonen vor oder während des Biegevorgangs die Materialstärke reduziert wird. Durch die beim Biegevorgang auftretende Stauchung kann die Materialstärke in dem Biegebereich beim Biegevorgang wieder etwas zunehmen und gegebenenfalls auch auf ihren ursprünglichen Wert zurückkehren. Jedenfalls aber wird eine Erhöhung der Materialstärke über die ursprüngliche Blechdicke hinaus während des Biegevorgangs vermieden.The heddle support rail according to the invention for heddle shafts consists of a bent sheet metal part with unbent legs 8, 9, wherein in the bending zones before or during the bending process, the material thickness is reduced. As a result of the compression occurring during the bending process, the material thickness in the bending region can again increase somewhat during the bending process and if necessary also return to its original value. In any case, an increase in material thickness beyond the original sheet thickness is avoided during the bending process.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Litzentragschieneshaft stave
22
Körperbody
33
Richtungdirection
44
BereichArea
55
Befestigungsabschnittattachment section
6, 76, 7
Abschnittesections
8, 98, 9
Ränder, SchenkelEdges, thighs
d, d1d, d1
Materialstärkematerial thickness
1010
Biegebereichbending area
1111
ZoneZone
1212
Kanalchannel
1313
Wandungwall
ww
Weitewidth
aa
Abstanddistance
1414
Spaltgap
1515
Rillegroove
16, 1716, 17
Walzenroll
18, 1918, 19
Flachseitenflat sides
20, 2120, 21
Walzenroll
22, 2322, 23
LitzenauflageflächeLitzenauflagefläche

Claims (10)

  1. Heald bar (1) for heald frames,
    with a body (2), which is made of sheet metal, is elongated in one direction (3) and is bent over along a bending line extending in the direction (3), as a result of which a bending region (10) is defined,
    wherein the body (2) is provided with a zone (11) of reduced material thickness extending along the bending line to form the bending region (10).
  2. Heald bar according to claim 1, characterised in that the zone (11) of reduced material thickness was configured before conducting a bending operation.
  3. Heald bar according to claim 1, characterised in that the zone (11) of reduced material thickness was configured during the bending operation.
  4. Heald bar according to claim 1, characterised in that the zone (11) of reduced material thickness is generated by material displacement in a rolling operation.
  5. Heald bar according to claim 1, characterised in that the zone (11) of reduced material thickness is formed by a depression (15) arranged along the bending line to be generated.
  6. Heald bar according to claim 1, characterised in that the zone (11) of reduced material thickness is arranged on an internally located side of the bending region (10) after configuration of the bending region (10).
  7. Heald bar according to claim 1, characterised in that the zone (11) of reduced material thickness has a rounded cross-section.
  8. Heald bar according to claim 1, characterised in that the zone (11) of reduced material thickness has a width, which occupies the entire bending region (10).
  9. Heald bar according to claim 1, characterised in that the body has two legs (6, 8), which are connected to one another via the bending region (10).
  10. Heald bar according to claim 9, characterised in that the legs (6, 8) define a gap (14) together, the width (a) of which is smaller than the width (w) of a channel (12) delimited by the bending region (10).
EP07006140A 2007-03-26 2007-03-26 Heald bar made of sheet metal Expired - Fee Related EP1975293B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP07006140A EP1975293B1 (en) 2007-03-26 2007-03-26 Heald bar made of sheet metal
JP2008077492A JP2008238276A (en) 2007-03-26 2008-03-25 Heald support bar made of bent sheet metal
CN2008100905060A CN101275325B (en) 2007-03-26 2008-03-25 Heald bar made of bending sheet metal
US12/078,023 US7624764B2 (en) 2007-03-26 2008-03-26 Heald support bar of bent sheet metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07006140A EP1975293B1 (en) 2007-03-26 2007-03-26 Heald bar made of sheet metal

Publications (2)

Publication Number Publication Date
EP1975293A1 EP1975293A1 (en) 2008-10-01
EP1975293B1 true EP1975293B1 (en) 2012-01-25

Family

ID=38293322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07006140A Expired - Fee Related EP1975293B1 (en) 2007-03-26 2007-03-26 Heald bar made of sheet metal

Country Status (4)

Country Link
US (1) US7624764B2 (en)
EP (1) EP1975293B1 (en)
JP (1) JP2008238276A (en)
CN (1) CN101275325B (en)

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CN101618412A (en) * 2009-07-27 2010-01-06 江苏银河电子股份有限公司 Bending method of upper casing and lower casing of thin metal sheet
DE102010044074A1 (en) * 2010-11-17 2012-05-24 Steelworks Gmbh & Co. Kg Method of forming a plate-shaped material into a three-dimensional object
US20190047030A1 (en) * 2016-02-23 2019-02-14 Koninklijke Philips N.V. Method of folding metal blank made of high-strenght material without cracks
AT17787U1 (en) * 2018-01-12 2023-02-15 Blum Gmbh Julius Drawer slide with at least one guide rail
DE102019117258B4 (en) * 2019-06-26 2021-04-01 Welser Profile Austria Gmbh Method for producing a guide rail and guide rail
CN116037775B (en) * 2023-03-31 2023-06-13 成都宏明双新科技股份有限公司 High-precision forming die and forming method for parts with support legs

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Also Published As

Publication number Publication date
CN101275325A (en) 2008-10-01
EP1975293A1 (en) 2008-10-01
CN101275325B (en) 2011-04-27
JP2008238276A (en) 2008-10-09
US7624764B2 (en) 2009-12-01
US20080236698A1 (en) 2008-10-02

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