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EP1099783B1 - Saw-toothed wire - Google Patents

Saw-toothed wire Download PDF

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Publication number
EP1099783B1
EP1099783B1 EP99122418A EP99122418A EP1099783B1 EP 1099783 B1 EP1099783 B1 EP 1099783B1 EP 99122418 A EP99122418 A EP 99122418A EP 99122418 A EP99122418 A EP 99122418A EP 1099783 B1 EP1099783 B1 EP 1099783B1
Authority
EP
European Patent Office
Prior art keywords
saw
tooth
foot
weight
blade
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 - Lifetime
Application number
EP99122418A
Other languages
German (de)
French (fr)
Other versions
EP1099783A1 (en
Inventor
Ralph A. Graf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Graf und Cie AG
Original Assignee
Graf und Cie AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to AT03000810T priority Critical patent/ATE291652T1/en
Application filed by Graf und Cie AG filed Critical Graf und Cie AG
Priority to EP03000810A priority patent/EP1318218B1/en
Priority to DE29924404U priority patent/DE29924404U1/en
Priority to DE59911815T priority patent/DE59911815D1/en
Priority to AT99122418T priority patent/ATE246272T1/en
Priority to ES99122418T priority patent/ES2200455T3/en
Priority to DE59906445T priority patent/DE59906445D1/en
Priority to ES03000810T priority patent/ES2236626T3/en
Priority to EP99122418A priority patent/EP1099783B1/en
Priority to JP2000328259A priority patent/JP2001162440A/en
Priority to TW089122983A priority patent/TW522183B/en
Priority to CA002325508A priority patent/CA2325508A1/en
Priority to BR0005315-5A priority patent/BR0005315A/en
Priority to MXPA00011036A priority patent/MXPA00011036A/en
Priority to TR2000/03334A priority patent/TR200003334A2/en
Publication of EP1099783A1 publication Critical patent/EP1099783A1/en
Priority to US10/366,210 priority patent/US20030116006A1/en
Application granted granted Critical
Publication of EP1099783B1 publication Critical patent/EP1099783B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/84—Card clothing; Manufacture thereof not otherwise provided for
    • D01G15/88—Card clothing; Manufacture thereof not otherwise provided for formed from metal sheets or strips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9319—Toothed blade or tooth therefor

Definitions

  • the invention relates to a sawtooth wire for the production a sawtooth all-steel set for the tambour of a card according to the preamble of claim 1.
  • the card becomes parallelized the individual fibers of a disordered fibers existing Raw materials used.
  • the card has this usually a circular cylindrical drum and a number of Over the peripheral surface of the drum distributed on flat bars.
  • the flat bars usually formed by sawtooth wires All-steel sets equipped, between which the parallelization process takes place.
  • the sawtooth all-steel set the spool usually in the form of a Circular cylindrical surface of the spool helically encircling Sawtooth wire is formed while the sawtooth all-steel set the lid by juxtaposed shegeieredrahtstMake can be formed.
  • With such cards can be more than 120 kg Raw material to be processed or parallelized per hour.
  • a sawtooth wire for the feed roller of a fiber processing apparatus with a particularly sing Tooth depth specified.
  • the technique of this invention is the object of a Sawtooth wire for producing a sawtooth all-steel set to provide for the tambour of a card, under avoidance Excessive material costs and ensuring a satisfactory Carding performance a high wear resistance during the carding operation.
  • the invention is based on the knowledge that the during operation of the known carding observed wear the drum sets in the first line on the between the the leaf sections of the individual coil of the set detained Fibers attributable to the blade edges forces is.
  • the width of the Garniturgassen between the individual spirals of the spool set in relation to the sheet width increased so as to solve the in these Garniturgassen Embedded fibers facilitate and reduce the stress on the fibers To reduce leaf edges through these fibers.
  • the clearance between the foot and the shoulder Tooth tip enlarged, so that the fiber material has more space and easier to get out of this free space.
  • the wear resistance of the invention Sawtooth wire increasing increase of the free space between the foot and the tooth tip is at the same time Ensuring a satisfactory carding result by using appropriate saw teeth, if the ratio of the leaf height to the tooth incision depth more as 1.5, preferably more than 1.8, more preferably about 2 the production of a satisfactory Carding result enabling saw teeth required tooth incision depth can be about 0.4 mm.
  • the Ratio of the blade height to the total height of the wire greater than 0.3, preferably greater than 0.4, more preferably about 0.45, however, less than 0.6, preferably less than 0.5.
  • the Total height of the wire less than 2.0 mm, preferably about 1.8 mm, the foot height less than 1.4 mm, preferably may be about 1.0 mm.
  • Ratio of the blade height to the total height of the wire can in In particular, a good wear resistance is ensured because of the attitude of one in relation to Overall height sufficiently large blade height also a the wear resistance increasing, especially large clearance between the Tooth tips and the foot is ensured.
  • This alloyed steel can be 0.3 to 2.0, preferably 0.8 to 0.85% by weight of carbon, 0.1 to 0.25, preferably 0.15 to 0.35 weight percent silicon, 0.1 to 2.0, preferably 0.4 to 0.6% manganese, 0.1 to 2.0, preferably 0.15 to 0.2% vanadium, and / or 0.1 to 2.0, preferably 0.4 to 0.6 Wt .-% chromium, wherein the proportions of phosphorus, sulfur, Nickel and copper are kept minimal. It is the Phosphorus expediently to less than 0.025 wt .-% and the sulfur content is limited to less than 0.25% by weight.
  • the service life of a using a set of sawtooth wire according to the invention are increased when the division error, i. the deviation from Specified distance between the tips of teeth of successive teeth less than 2%, preferably less than 1.0%, because then with correct Garniturmontage on to a first wear leading checker or first leveling is no longer necessary.
  • the minimization of the division errors can be achieved by that during wire production, especially during the punching process, a high-precision wire feed is used, which has a rule compensation calculator is controlled.
  • a corresponding scanning method For example, a laser scanning method can possibly occurring pitch errors during production immediately be detected and corrected.
  • the sawtooth wire 10 shown in the drawing consists essentially a foot section 20 and a Sheet section 30.
  • the foot portion 20 at its the Leaf section 30 opposite side of a substantially plane lower boundary surface 24 limited, of the two a Right angle thus enclosing flank surfaces 26 and 28th go out and extend toward the blade portion 30.
  • This shape of the foot section ensures that the sawtooth wire shown in the drawing on a spool can be mounted with a smooth roll surface, wherein the then helically circulating sawtooth wire arranged so is that the flank surfaces of the foot sections successive Wendel abut each other.
  • the foot section starts from the flank surface 26 via a foot 22 in the leaf portion 30 about, with a number of teeth 32 is provided.
  • the teeth are 32nd starting from the foot portion 20 facing away from Edge of the blade portion 30 in the direction of the foot portion 20th extending tooth incisions 34 are formed.
  • the pitch p i.e. Distance between the teeth tips of successive teeth constant and is about 1.699 mm.
  • the flank surface 38 of the blade portion 30 coplanar to the flank surface 28 of the foot section 20 formed, wherein the width of the blade portion starting from the tooth tips 32 in the direction of the foot portion 20 steadily increases.
  • the width b1 of the leaf section is in Range of tooth tips about 0.05 mm, while the width b2 of the Leaf portion 30 at the foot 20 is about 0.24 mm, the Width b4 at the intermediate point of the deepest Tooth incision is about 0.15 mm.
  • the width b3 of the rectifabiteses is approximately constant over its entire height and is in the embodiment shown in the drawing of the invention 0.4 mm.
  • the total height of the sawtooth wire h1 is 1.8 mm, the height h2 of the foot section 1.0 mm, the tooth incision depth h4 0.4 mm and the height h5 of the leaf section 0.8 mm.
  • the individual teeth 32 in the form of curved teeth with a in the direction formed on the tooth tip 32c bent forward curvature.
  • the radius of curvature r is 0.19 mm.
  • Towards the Tooth tip 32c runs the curved portion 32a of the tooth face of the teeth 32 in a rectilinear extending portion 32b out. Through this straight-line section is a gentle engagement of the teeth in the fiber material allows.
  • the teeth 32 of the shezalindrahtes shown in the drawing have in the region of their tips 32c in the stretched state one Chest angle ⁇ of 40 °.
  • the invention is not based on the drawing explained embodiment limited. Rather, it is also on the use of sawtooth wires with other dimensions thought. Furthermore, in the context of this invention also sawtooth wires be used with variable pitch p. Furthermore is also involved in the use of sawtooth wires according to the invention thought lockable foot sections.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

Card clothing wire has a tapered blade section (30) joined at a shoulder (22) on one side to a thicker base section (20). The thickness (b3) of the base section is greater than 2, preferably 2.6 times the thickness (b4) of the blade section measured at the lowest part of the teeth. The preferred thickness dimensions of the other parts of the wire are also specified. An independent claim is also included, preferably for a wire if this type, having a teeth height (h5) greater than 0.3 times, preferably 0.45 times, the height (h1) of the wire. The preferred other height dimensions are also specified.

Description

Die Erfindung betrifft einen Sägezahndraht zur Herstellung einer Sägezahn-Ganzstahlgarnitur für den Tambour einer Karde nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a sawtooth wire for the production a sawtooth all-steel set for the tambour of a card according to the preamble of claim 1.

Bei der Faserverarbeitung wird die Karde zur Parallelisierung der Einzelfasern eines aus ungeordneten Fasern bestehenden Rohmaterials eingesetzt. Dazu weist die Karde üblicherweise einen kreiszylinderförmigen Tambour und eine Anzahl von über die Umfangsfläche des Tambours verteilten Deckelstäben auf. Zum Zweck der Parallelisierung sind sowohl der Tambour als auch die Deckelstäbe üblicherweise mit durch Sägezahndrähte gebildeten Ganzstahlgarnituren ausgestattet, zwischen denen der Parallelisierungsvorgang stattfindet. Dabei ist die Sägezahn-Ganzstahlgarnitur des Tambours üblicherweise in Form eines die Kreiszylindermantelfläche des Tambours wendelförmig umlaufenden Sägezahndrahtes gebildet, während die Sägezahn-Ganzstahlgarnitur der Deckel durch nebeneinander angeordnete Sägezahndrahtstreifen gebildet sein kann. Mit derartigen Karden können mehr als 120 kg Rohmaterial pro Stunde verarbeitet bzw. parallelisiert werden. Dabei kann eine zufriedenstellende Kardierleistung sichergestellt werden, wenn für den Tambour der Karde Sägezahn-Ganzstahlgarnituren nach der EP 0 360 961 B2 eingesetzt werden. Es hat sich jedoch gezeigt, daß diese bekannten Sägezahn-Ganzstahlgarnituren während des Betriebs insbesondere bei den vorstehend erwähnten hohen Produktionsleistungen einem starken Verschleiß unterliegen.In fiber processing, the card becomes parallelized the individual fibers of a disordered fibers existing Raw materials used. The card has this usually a circular cylindrical drum and a number of Over the peripheral surface of the drum distributed on flat bars. For the purpose of parallelization are both the drum as well the flat bars usually formed by sawtooth wires All-steel sets equipped, between which the parallelization process takes place. Here is the sawtooth all-steel set the spool usually in the form of a Circular cylindrical surface of the spool helically encircling Sawtooth wire is formed while the sawtooth all-steel set the lid by juxtaposed Sägezahndrahtstreifen can be formed. With such cards can be more than 120 kg Raw material to be processed or parallelized per hour. In this case, a satisfactory Kardierleistung ensured if for the tambour of the card sawtooth all-steel sets according to EP 0 360 961 B2. It However, it has been shown that these known sawtooth all-steel sets during operation, especially at the above high production rates mentioned a strong wear subject.

In der CH 660 884 A5 ist das Problem des starken Verschleisses von Kardengarnituren bereits angesprochen. Zur Lösung dieses Problems wird in der genannten Schrift der Einsatz besonderer Stahllegierungen zur Herstellung dieser Kardengarnituren vorgeschlagen. Dabei ist jedoch bereits das weitere Problem angesprochen, daß besonders verschleißfeste Stahllegierungen auch besonders teuer sind, so daß im Zusammenhang mit Kardengarnituren das Preis-Leistungsoptimum nicht bei der maximalen Verschleißfestigkeit liegt, sondern bei der Wahl eines Garniturmaterials liegt, bei der die Zunahme der Verschleißfestigkeit nicht durch die erhöhten Material- und Herstellungskosten wieder wettgemacht werden. Daher sind auch bei Einsatz der in der genannten schweizerischen Patentschrift beschriebenen legierten Stähle zur Herstellung von Kardengarnituren der in der EP 0 360 961 B2 beschriebenen Art noch die beschriebenen Probleme hinsichtlich der Verschleißfestigkeit zu beobachten.In the CH 660 884 A5 is the problem of heavy wear of card clothing already addressed. To the solution This problem is the use of special in the mentioned document Steel alloys for the production of these card clothing proposed. However, this is already the other problem addressed that particularly wear-resistant steel alloys are also very expensive, so that in connection with card clothing the price-performance optimum not at the maximum Wear resistance is, but in the choice of a clothing material lies where the increase in wear resistance not by the increased material and manufacturing costs again be made up for. Therefore, even when using in the described Swiss patent specification alloyed Steels for the production of card clothing in EP 0 360 961 B2 still described the problems described in terms of wear resistance.

Ferner ist in der GB 2 322 640 A ein Sägezahndraht für die Zuführwalze einer Faserverarbeitungsvorrichtung mit einer besonders gesingen Zahneinschnittiefe angegeben.Further, in GB 2 322 640 A, a sawtooth wire for the feed roller of a fiber processing apparatus with a particularly sing Tooth depth specified.

Angesichts der vorstehend erläuterten Probleme im Stand der Technik liegt dieser Erfindung die Aufgabe zugrunde, einen Sägezahndraht zur Herstellung einer Sägezahn-Ganzstahlgarnitur für den Tambour einer Karde bereitzustellen, der unter Vermeidung übermäßiger Materialkosten und Sicherstellung einer zufriedenstellenden Kardierleistung eine hohe Verschleißfestigkeit während des Kardierbetriebes aufweist. In view of the above-discussed problems in the state the technique of this invention is the object of a Sawtooth wire for producing a sawtooth all-steel set to provide for the tambour of a card, under avoidance Excessive material costs and ensuring a satisfactory Carding performance a high wear resistance during the carding operation.

Erfindungsgemäß wird diese Aufgabe durch die ein kenzeichnenden Teil des Patentanspruchs 1 angegebene Weiterbildung der bekannten Sägerahndrahte gelöst.This object is achieved by a kenzeichnenden Part of claim 1 specified development of the known Sawmill wire solved.

Die Erfindung geht auf die Erkenntnis zurück, daß der während des Betriebs der bekannten Karden beobachtete Verschleiß der Tambourgarnituren in erste Linie auf die von den zwischen den Blattabschnitten der einzelnen Wendel der Garnitur festgehaltenen Fasern auf die Blattflanken ausgeübten Kräfte zurückzuführen ist. Mit der erfindungsgemäßen Weiterbildung der Sägezahndrähte wird die Breite der Garniturgassen zwischen den einzelnen Wendeln der Tambourgarnitur im Verhältnis zur Blattbreite erhöht, um so das Lösen der in diesen Garniturgassen eingelagerten Fasern zu erleichtern und die Beanspruchung der Blattflanken durch diese Fasern zu reduzieren. Mit anderen Worten wird durch die erfindungsgemäße Weiterbildung der bekannten Sägezahndrähte der Freiraum zwischen der Fußschulter und der Zahnspitze vergrößert, so daß das Fasermaterial mehr Platz hat und einfacher wieder aus diesem Freiraum entfernt werden kann. Das ist im besonderen bei hohen Produktionsleistungen und/oder bei der Verarbeitung von Langstapelbaumwolle im Hinblick auf den Erhalt einer hohen Verschleißfestigkeit von besonderer Bedeutung. Es hat sich gezeigt, daß durch diese Weiterbildung mit nur einer Tambourgarnitur ohne nennenswerten Verschleiß Durchsatzmengen von 1000 t und mehr erzielt werden können.The invention is based on the knowledge that the during operation of the known carding observed wear the drum sets in the first line on the between the the leaf sections of the individual coil of the set detained Fibers attributable to the blade edges forces is. With the development of the sawtooth wires according to the invention the width of the Garniturgassen between the individual spirals of the spool set in relation to the sheet width increased so as to solve the in these Garniturgassen Embedded fibers facilitate and reduce the stress on the fibers To reduce leaf edges through these fibers. In other words is through the inventive development of the known Sawtooth wires the clearance between the foot and the shoulder Tooth tip enlarged, so that the fiber material has more space and easier to get out of this free space. This is especially true for high production outputs and / or in the processing of long staple cotton in terms of Maintaining a high wear resistance of special Meaning. It has been shown that through this training with only one spool set without significant wear Throughputs of 1000 t and more can be achieved.

Dabei hat es sich bei Einsatz erfindungsgemäßer Sägezahndrähte zur Herstellung einer Sägezahn-Ganzstahlgarnitur für den Tambour einer Karde überraschenderweise gezeigt, daß die dadurch erreichte Verbreiterung der Garniturgassen im Verhältnis zur Breite der Blattabschnitte keinen nennenswerten Einfluß auf die Kardierleistung, d.h. den Grad der durch den Kardiervorgang erzielten Parallelisierung hat. Es hat sich jedoch herausgestellt, daß besonders gute Kardierergebnisse erzielt werden können, wenn das Verhältnis der Fußbreite zur Blattbreite an der Stelle des tiefsten Zahneinschnitters kleiner als 3 ist und die Fußbreite 0,2 bis 0,6 mm beträgt. Bei Verwendung erfindungsgemäßer Garnituren kann der gewünschte große Freiraum zwischen der Fußschulter und der Zahnspitze unter Vermeidung einer zu geringen Stabilität des Blattabschnittes bei gleichzeitiger Sicherstellung eines besonders guten Kardierergebnisses verwirklicht werden, wenn die Blattbreite ausgehend von dem dem Fußabschnitt abgewandten Rand des Blattabschnittes in Richtung auf den Fußabschnitt zumindest abschnittweise stetig zunimmt und das Verhältnis der Fußbreite zur Blattbreite am Fuß größer als 1,4, vorzugsweise etwa 1,6 ist. In diesem Zusammenhang hat es sich als besonders zweckmäßig erwiesen, wenn die Blattbreite an dem dem Fußabschnitt abgewandten Rand des Blattabschnittes etwa 0,02 bis 0,2 mm, vorzusweise etwa 0,5 mm beträgt und die Blattbreite am Fuß etwa 0,2 bis 0,3 mm, vorzugsweise etwa 0,24 mm beträgt.It has been when using inventive sawtooth wires for producing a sawtooth all-steel set for the tambour of a card surprisingly shown that by reached broadening of the Garniturgassen in the relationship to the width of the leaf sections no significant influence the carding performance, i. the degree of the carding process achieved parallelization. However, it has turned out that particularly good carding results can be achieved when the ratio of the foot width to the sheet width at the Place the deepest tooth cut is less than 3 and the foot width is 0.2 to 0.6 mm. When using sets according to the invention Can the desired large space between the foot and the tooth tip while avoiding too low Stability of the blade section while securing a particularly good carding result can be realized if the sheet width starting from the side facing away from the foot section Edge of the blade section towards the foot section at least in sections, steadily increasing and the ratio the foot width to the leaf width at the foot is greater than 1.4, preferably about 1.6. In this context, it has proved to be particularly useful when the sheet width the edge of the blade section facing away from the foot section approximately 0.02 to 0.2 mm, preferably about 0.5 mm, and the blade width at the foot is about 0.2 to 0.3 mm, preferably about 0.24 mm.

Eine weitere, die Verschleißfestigkeit des erfindungsgemäßen Sägezahndrahtes vergrößernde Erhöhung des Freiraumes zwischen der Fußschulter und der Zahnspitze wird bei gleichzeitiger Sicherstellung eines zufriedenstellenden Kardierergebnisses durch Verwendung entsprechender Sägezähne ermöglicht, wenn das Verhältnis der Blatthöhe zur Zahneinschnittiefe mehr als 1,5, vorzugsweise mehr als 1,8, besonders bevorzugt etwa 2 beträgt, wobei die zur Herstellung von ein zufriedenstellendes Kardierergebnis ermöglichenden Sägezähnen benötigte Zahneinschnittiefe etwa 0,4 mm betragen kann.Another, the wear resistance of the invention Sawtooth wire increasing increase of the free space between the foot and the tooth tip is at the same time Ensuring a satisfactory carding result by using appropriate saw teeth, if the ratio of the leaf height to the tooth incision depth more as 1.5, preferably more than 1.8, more preferably about 2 the production of a satisfactory Carding result enabling saw teeth required tooth incision depth can be about 0.4 mm.

Dabei ist jedoch darauf zu achten, daß der vergrößerte Freiraum zwischen Fußschulter und Zahnspitze erfindungsgemäßer Sägezahndrähte auch zu einer Erhöhung des während des Kardiervorganges durch das Rotieren des Tambours mitgeführten Luftvolumens führt, welches wiederum das Kardierergebnis beeinflussen kann. Zur Vermeidung eines übermäßigen Freiraums zwischen Fußschulter und Zahnspitze wird das Verhältnis der Blatthöhe zur Zahneinschnittiefe zweckmäßigerweise auf höchstens 3,5, vorzugsweise höchstens 2,5 begrenzt.However, it is important to ensure that the enlarged Free space between Fußschulter and tooth tip according to the invention Sawtooth wires also increase the value during the carding process by the rotation of the drum entrained air volume leads, which in turn affect the carding result can. To avoid excessive space between Foot shoulder and tooth tip is the ratio of leaf height to the tooth incision depth expediently to at most 3.5, preferably at most 2.5 limited.

Im Hinblick auf die Vermeidung übermäßiger Materialkosten unter gleichzeitiger Sicherstellung eines mit einer hinreichenden Stabilität auf den Tambour der Karde aufziehbaren Sägezahndrahtes hat es sich als vorteilhaft erwiesen, wenn das Verhältnis der Blatthöhe zur Gesamthöhe des Drahtes größer als 0,3, vorzugsweise größer als 0,4, besonders bevorzugt etwa 0,45, jedoch kleiner 0,6, vorzugsweise kleiner als 0,5 ist. In diesem Zusammenhang hat es sich weiter als günstig erwiesen, wenn die Gesamthöhe des Drahtes weniger als 2,0 mm, vorzugsweise etwa 1,8 mm beträgt, wobei die Fußhöhe weniger als 1,4 mm, vorzugsweise etwa 1,0 mm betragen kann. Durch die richtige Wahl des Verhältnisses der Blatthöhe zur Gesamthöhe des Drahtes kann im bsonderen auch eine gute Verschleißfestigkeit sichergestellt werden, weil durch die Einstellung einer im Verhältnis zur Gesamthöhe hinreichend großen Blatthöhe auch ein die Verschleißfestigkeit erhöhender, besonders großer Freiraum zwischen den Zahnspitzen und der Fußschulter sichergestellt wird.With a view to avoiding excessive material costs while ensuring one with a sufficient Stability on the tambour of the carding wind-up Sawtooth wire, it has proved to be advantageous if the Ratio of the blade height to the total height of the wire greater than 0.3, preferably greater than 0.4, more preferably about 0.45, however, less than 0.6, preferably less than 0.5. In this Context, it has further proven to be beneficial if the Total height of the wire less than 2.0 mm, preferably about 1.8 mm, the foot height less than 1.4 mm, preferably may be about 1.0 mm. By the right choice of Ratio of the blade height to the total height of the wire can in In particular, a good wear resistance is ensured because of the attitude of one in relation to Overall height sufficiently large blade height also a the wear resistance increasing, especially large clearance between the Tooth tips and the foot is ensured.

Wie eingangs bereits erläutert, hat es sich zum Erhalt einer möglichst hohen Verschleißfestigkeit als vorteilhaft erwiesen, wenn der erfindungsgemäße Sägezahndraht aus legiertem Stahl besteht. Dieser legierte Stahl kann 0,3 bis 2,0, vorzugsweise 0,8 bis 0,85 Gew.-% Kohlenstoff, 0,1 bis 0,25, vorzugsweise 0,15 bis 0,35 Gew.-% Silicium, 0,1 bis 2,0, vorzugsweise 0,4 bis 0,6 % Mangan, 0,1 bis 2,0, vorzugsweise 0,15 bis 0,2 % Vanadium, und/oder 0,1 bis 2,0, vorzugsweise 0,4 bis 0,6 Gew.-% Chrom aufweisen, wobei die Anteile von Phosphor, Schwefel, Nickel und Kupfer minimal gehalten sind. Dabei wird der Phosphoranteil zweckmäßigerweise auf weniger als 0,025 Gew.-% und der Schwefelanteil auf weniger als 0,25 Gew.-% beschränkt.As already explained, it has to be preserved the highest possible wear resistance proved to be advantageous if the sawtooth wire according to the invention of alloyed Steel exists. This alloyed steel can be 0.3 to 2.0, preferably 0.8 to 0.85% by weight of carbon, 0.1 to 0.25, preferably 0.15 to 0.35 weight percent silicon, 0.1 to 2.0, preferably 0.4 to 0.6% manganese, 0.1 to 2.0, preferably 0.15 to 0.2% vanadium, and / or 0.1 to 2.0, preferably 0.4 to 0.6 Wt .-% chromium, wherein the proportions of phosphorus, sulfur, Nickel and copper are kept minimal. It is the Phosphorus expediently to less than 0.025 wt .-% and the sulfur content is limited to less than 0.25% by weight.

Im Hinblick auf den Erhalt einer hohen Verschleißfestigkeit hat es sich weiter als zweckmäßig erwiesen, wenn die Rauhigkeit an den Seitenflanken des Blattabschnittes zumindest im Bereich der Zähne weniger als 5 µm, vorzugsweise weniger als 4 µm beträgt, weil eine übermäßige Rauhigkeit zu einer erhöhten Reibung und damit auch zu einem erhöhten Verschleiß führt. Diese geringe Rauhigkeit kann erreicht werden, wenn die Sägezahndrähte nach einem Stanz- und Härteprozeß einem gesonderten Arbeitsgang zum Erhalt der gewünschten Oberflächeneigenschaften unterzogen werden. Dabei hat es sich als besonders zweckmäßig herausgestellt, wenn die Sägezahndrähte in diesem gesonderten Arbeitsgang in einer Entgratungs- und Polieranlage einem galvanischen Polierprozeß unterzogen werden.In order to obtain a high wear resistance It has further proven to be useful if the Roughness on the side edges of the leaf portion at least in the field of teeth less than 5 microns, preferably less than 4 microns, because excessive roughness increases Friction and thus also leads to increased wear. This low roughness can be achieved when the sawtooth wires after a punching and hardening process a separate operation to obtain the desired surface properties become. It has proved to be particularly useful if the sawtooth wires in this separate operation in a deburring and polishing plant a galvanic Be subjected to polishing process.

Darüber hinaus kann die Standzeit einer unter Verwendung eines erfindungsgemäßen Sägezahndrahtes hergestellten Garnitur erhöht werden, wenn der Teilungsfehler, d.h. die Abweichung vom Sollabstand zwischen den Zahnspitzen aufeinanderfolgender Zähne weniger als 2 %, vorzugsweise weniger als 1,0 % beträgt, weil dann bei korrekter Garniturmontage ein zu einem ersten Verschleiß führender Kontrollschliff oder ein erstmaliges Egalisieren nicht mehr notwendig ist. Die Minimalisierung der Teilungsfehler kann dadurch erreicht werden, daß während der Drahtherstellung, insbesondere während des Stanzvorgangs ein Hochpräzisionsdrahtvorschub benutzt wird, der über einen Regel-Kompensationsrechner gesteuert wird. Durch ein entsprechendes Abtastverfahren, beispielsweise ein Laser-Abtastverfahren, können evtl. auftretende Teilungsfehler während der Herstellung sofort erfaßt und korrigiert werden.In addition, the service life of a using a set of sawtooth wire according to the invention are increased when the division error, i. the deviation from Specified distance between the tips of teeth of successive teeth less than 2%, preferably less than 1.0%, because then with correct Garniturmontage on to a first wear leading checker or first leveling is no longer necessary. The minimization of the division errors can be achieved by that during wire production, especially during the punching process, a high-precision wire feed is used, which has a rule compensation calculator is controlled. By a corresponding scanning method, For example, a laser scanning method can possibly occurring pitch errors during production immediately be detected and corrected.

Weiter hat es sich zum Erhalt einer hohen Verschleißfestigkeit als besonders zweckmäßig erwiesen, wenn die einzelnen Zähne des erfindungsgemäßen Sägezahndrahtes in Form von Bogenzähnen mit einer bogenförmig verlaufenden Zahnbrust gebildet sind, wobei der Krümmungsradius der Zahnbrust zweckmäßigerweise etwa 0,15 bis 0,25 mm, besonders bevorzugt etwa 0,19 mm beträgt. Dabei kann ein schonender Griff in das zu parallelisierende Fasermaterial sichergestellt werden, wenn die Zahnbrust in Richtung auf die Zahnspitze in einen geradlinig verlaufenden Abschnitt, dessen Länge vorzugsweise im Bereich von 0,02 bis 0,2 mm liegt.It also has to maintain a high wear resistance proved to be particularly useful when the individual Teeth of the sawtooth wire according to the invention in the form of curved teeth formed with an arcuate tooth face are, wherein the radius of curvature of the tooth face expediently about 0.15 to 0.25 mm, more preferably about 0.19 mm. This can be a gentle grip in the fiber material to be parallelized be ensured when the tooth face in the direction on the tooth tip in a rectilinear section, its length preferably in the range of 0.02 to 0.2 mm is located.

Nachstehend wird die Erfindung unter Bezugnahme auf die Zeichnung, auf die hinsichtlich aller erfindungswesentlichen und in der Beschreibung nicht näher herausgestellten Einzelheiten ausdrücklich verwiesen wird erläutert. In der Zeichnung zeigt:

Fig. 1
eine Seitenansicht eines erfindungsgemäßen Sägezahndrahtes,
Fig. 2
eine Schnittansicht durch den in Fig. 1 dargestellten Sägezahndraht und
Fig. 3
eine Detaildarstellung eines Sägezahnes des in Fig. 1 dargestellten Sägezahndrahtes.
In the following, the invention will be explained with reference to the drawing, to which reference is expressly made with regard to all details essential to the invention and details which are not further detailed in the description. In the drawing shows:
Fig. 1
a side view of a sawtooth wire according to the invention,
Fig. 2
a sectional view through the sawtooth wire shown in Fig. 1 and
Fig. 3
a detailed representation of a sawtooth of the sawtooth wire shown in Fig. 1.

Der in der Zeichnung dargestellte Sägezahndraht 10 besteht im wesentlichen aus einer Fußabschnitt 20 und einem Blattabschnitt 30. Dabei wird der Fußabschnitt 20 an seiner dem Blattabschnitt 30 abgewandten Seite von einer im wesentlichen ebenen unteren Begrenzungsfläche 24 begrenzt, von der zwei einen rechten Winkel damit einschließende Flankenflächen 26 und 28 ausgehen und sich in Richtung auf den Blattabschnitt 30 erstrecken. Durch diese Form des Fußabschnittes wird erreicht, daß der in der Zeichnung dargestellte Sägezahndraht auf einen Tambour mit glatter Walzenoberfläche aufgezogen werden kann, wobei der dann wendelförmig umlaufende Sägezahndraht so angeordnet ist, daß die Flankenflächen der Fußabschnitte aufeinanderfolgender Wendel aneinander anliegen.The sawtooth wire 10 shown in the drawing consists essentially a foot section 20 and a Sheet section 30. In this case, the foot portion 20 at its the Leaf section 30 opposite side of a substantially plane lower boundary surface 24 limited, of the two a Right angle thus enclosing flank surfaces 26 and 28th go out and extend toward the blade portion 30. This shape of the foot section ensures that the sawtooth wire shown in the drawing on a spool can be mounted with a smooth roll surface, wherein the then helically circulating sawtooth wire arranged so is that the flank surfaces of the foot sections successive Wendel abut each other.

Der Fußabschnitt geht ausgehend von der Flankenfläche 26 über eine Fußschulter 22 in den Blattabschnitt 30 über, der mit eine Anzahl von Zähnen 32 versehen ist. Dabei sind die Zähne 32 durch sich ausgehend von dem dem Fußabschnitt 20 abgewandten Rand des Blattabschnittes 30 in Richtung auf den Fußabschnitt 20 erstreckenden Zahneinschnitten 34 gebildet sind. Bei der in der Zeichnung dargestellten Ausführungsform ist die Zahnteilung p, d.h. Abstand zwischen den Zahnspitzen aufeinanderfolgender Zähne konstant und beträgt etwa 1,669 mm. Wie besonders deutlich in Fig. 2 zu erkennen ist, ist die Flankenfläche 38 des Blattabschnitts 30 coplanar zur Flankenfläche 28 des Fußabschnittes 20 gebildet, wobei die Breite des Blattabschnittes ausgehend von den Zahnspitzen 32 in Richtung auf den Fußabschnitt 20 stetig zunimmt. Dabei beträgt die Breite b1 des Blattabschnittes im Bereich der Zahnspitzen etwa 0,05 mm, während die Breite b2 des Blattabschnittes 30 am Fuß 20 etwa 0,24 mm beträgt, wobei die Breite b4 an der dazwischen liegenden Stelle des tiefsten Zahneinschnitts etwa 0,15 mm beträgt. Die Breite b3 des Fußabschnittes ist über dessen gesamte Höhe etwa konstant und beträgt bei der in der Zeichnung dargestellten Ausführungsform der Erfindung 0,4 mm.The foot section starts from the flank surface 26 via a foot 22 in the leaf portion 30 about, with a number of teeth 32 is provided. The teeth are 32nd starting from the foot portion 20 facing away from Edge of the blade portion 30 in the direction of the foot portion 20th extending tooth incisions 34 are formed. When in the Drawing illustrated embodiment is the pitch p, i.e. Distance between the teeth tips of successive teeth constant and is about 1.699 mm. How very clear in Fig. 2 can be seen, is the flank surface 38 of the blade portion 30 coplanar to the flank surface 28 of the foot section 20 formed, wherein the width of the blade portion starting from the tooth tips 32 in the direction of the foot portion 20 steadily increases. In this case, the width b1 of the leaf section is in Range of tooth tips about 0.05 mm, while the width b2 of the Leaf portion 30 at the foot 20 is about 0.24 mm, the Width b4 at the intermediate point of the deepest Tooth incision is about 0.15 mm. The width b3 of the Fußabschnittes is approximately constant over its entire height and is in the embodiment shown in the drawing of the invention 0.4 mm.

Bei der in der Zeichnung dargestellten Ausführungsform der Erfindung beträgt die Gesamthöhe des Sägezahndrahtes h1 1,8 mm, die Höhe h2 des Fußabschnittes 1,0 mm, die Zahneinschnittiefe h4 0,4 mm und die Höhe h5 des Blattabschnittes 0,8 mm.In the embodiment shown in the drawing the invention, the total height of the sawtooth wire h1 is 1.8 mm, the height h2 of the foot section 1.0 mm, the tooth incision depth h4 0.4 mm and the height h5 of the leaf section 0.8 mm.

Wie besonders deutlich in Fig. 3 dargestellt, sind die einzelnen Zähne 32 in Form von Bogenzähnen mit einer in Richtung auf die Zahnspitze 32c nach vorne gebogenen Krümmung gebildet. Dabei beträgt der Krümmungsradius r 0,19 mm. In Richtung auf die Zahnspitze 32c läuft der gekrümmte Abschnitt 32a der Zahnbrust der Zähne 32 in einem geradlinigen verlaufenden Abschnitt 32b aus. Durch diesen geradlinig verlaufenden Abschnitt wird ein schonender Eingriff der Zähne in das Fasermaterial ermöglicht. Die Zähne 32 des in der Zeichnung dargestellten Sägezalindrahtes weisen im Bereich ihrer Spitzen 32c in gestrecktem Zustand einen Brustwinkel α von 40° auf. Der Winkel β zwischen dem etwa geradlinig verlaufenden Zahnrücken und einer senkrecht zur unteren Begrenzungsfläche 24 des Drahtes 10 verlaufenden Geraden beträgt 65°, so daß sich ein Keilwinkel von 25° ergibt. Durch die erläuterte Abstimmung der Fußbreite b3 auf die Blattbreite b2 am Fuß, die Blattbreite b4 an der Stelle des tiefsten Zahneinschnitts und die Blattbreite b1 an der Zahnspitze wird bei einer aus dem in der Zeichnung dargestellten Sägezahndraht hergestellten Garnitur ein besonders großer Freiraum zwischen der Fußschulter 22 und der Zahnspitze 32c sichergestellt, mit dem unter Sicherstellung einer guten Kardierwirkung auch dann eine hohe Verschleißfestigkeit erreicht werden kann, wenn der Sägezahndraht aus einer vergleichsweise preisgünstigen Stahllegierung der eingangs beschriebenen Art hergestellt ist.As shown particularly clearly in Fig. 3, the individual teeth 32 in the form of curved teeth with a in the direction formed on the tooth tip 32c bent forward curvature. The radius of curvature r is 0.19 mm. Towards the Tooth tip 32c runs the curved portion 32a of the tooth face of the teeth 32 in a rectilinear extending portion 32b out. Through this straight-line section is a gentle engagement of the teeth in the fiber material allows. The teeth 32 of the Sägezalindrahtes shown in the drawing have in the region of their tips 32c in the stretched state one Chest angle α of 40 °. The angle β between the approximately rectilinear extending back of the teeth and one perpendicular to the lower Limiting surface 24 of the wire 10 extending straight lines 65 °, so that a wedge angle of 25 ° results. Explained by the Adjusting the foot width b3 to the sheet width b2 am Foot, the leaf width b4 at the point of the deepest tooth incision and the blade width b1 at the tooth tip becomes at made from the sawtooth wire shown in the drawing Set a particularly large space between the foot 22 and the tooth tip 32c ensured with the under Ensuring a good carding effect even then high wear resistance can be achieved when the sawtooth wire from a comparatively inexpensive steel alloy made of the type described above.

Die Erfindung ist nicht auf das anhand der Zeichnung erläuterte Ausführungsbeispiel beschränkt. Vielmehr ist auch an den Einsatz von Sägezahndrähten mit anderen Abmessungen gedacht. Ferner können im Rahmen dieser Erfindung auch Sägezahndrähte mit variabler Zahnteilung p eingesetzt werden. Im übrigen ist auch an den Einsatz erfindungsgemäßer Sägezahndrähte mit verriegelbaren Fußabschnitten gedacht.The invention is not based on the drawing explained embodiment limited. Rather, it is also on the use of sawtooth wires with other dimensions thought. Furthermore, in the context of this invention also sawtooth wires be used with variable pitch p. Furthermore is also involved in the use of sawtooth wires according to the invention thought lockable foot sections.

Claims (12)

  1. Saw-toothed wire for manufacturing saw-toothed all-steel fittings for the cylinder of a carding engine with a foot section (20) and a blade section (30) connected to it by a foot shoulder (22), wherein the blade section (30) exhibits saw-teeth (32) formed by the tooth indentations (34) departing from the edge of the blade section (30) facing away from the foot section (20), characterised in that the ratio of the foot width (b3) to the blade width (b4) at the point of the deepest tooth indentation is greater than 2 and less than 3, and in that the foot width is 0.2-0.6 mm.
  2. Saw-tooth wire according to claim 1, characterised in that the blade width gradually increases, at least in sections, from the edge of the blade section (30) facing away from the foot section (20) in the direction of the foot section (20), and in that the ratio of the foot width (b3) to the blade width (2) on the foot is greater than 1.4.
  3. Saw-tooth ire according to one of the preceding claims, characterised in that the blade width (b1) on the edge of the blade section (30) facing away from the foot section (20) is approximately 0.2 - 0.2 mm.
  4. Saw-tooth wire according to one of the preceding claims, characterised in that the ratio of the blade height (h5) to the depth of tooth indentation (h4) is greater than 1.5, preferably greater than 1.8, and in particular preference approximately 2.
  5. Saw-tooth wire according to claim 4, characterised in that the ratio of the blade height (h5) to the depth of tooth indentation (h4) is smaller than 3.5.
  6. Saw-tooth wire according to one of the preceding claims, characterised in that the ratio of the blade height (h5) to the total height (h1) of the wire (10) is greater than 0.3.
  7. Saw-tooth wire according to claim 6, characterised in that the ratio of the blade height (h4) to the total height (h1) of the wire (10) is smaller than 0.6.
  8. Saw-tooth wire according to one of the preceding claims, characterised in that the total height (h1) of the wire is less than 2.0 mm.
  9. Saw-tooth wire according to one of the preceding claims, characterised in that the foot height (h2) is less than 1.4 m.
  10. Saw-tooth wire according to one of the preceding claims, characterised in that the saw-tooth wire (10) consists of alloy steel.
  11. Saw-tooth wire according to claim 10, characterised in that the alloy steel exhibits 0.3 - 2.0 % by weight of carbon, 0.1 - 2.5% by weight of silicon, 0.1 - 2.0% by weight of manganese, 0.1-2.0% by weight of vanadium, 0.1 - 2.0% by weight chromium and/or 0.6 - 0.7% by weight of tungsten.
  12. Saw-tooth wire according to claim 10, characterised in that the alloy steel exhibits 09.80-0.85% by weight of carbon, 0.40 - 0.60% by weight of manganese, 0.10 - 0.30% by weight of silicon, 0.60 - 0.70% by weight of tungsten and/or 0.15 - 0.20% by weight of vanadium, and/or contains less than 0.02% by weight of phosphorus and less than 09.02% by weight of sulphur.
EP99122418A 1999-11-10 1999-11-10 Saw-toothed wire Expired - Lifetime EP1099783B1 (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
EP03000810A EP1318218B1 (en) 1999-11-10 1999-11-10 Saw-toothed wire
DE29924404U DE29924404U1 (en) 1999-11-10 1999-11-10 Saw-tooth wire for card clothing uses teeth and base section of numerically defined dimensional properties
DE59911815T DE59911815D1 (en) 1999-11-10 1999-11-10 sawtooth
AT99122418T ATE246272T1 (en) 1999-11-10 1999-11-10 SAW TOOTH WIRE
ES99122418T ES2200455T3 (en) 1999-11-10 1999-11-10 SAW TOOTH SLIP.
DE59906445T DE59906445D1 (en) 1999-11-10 1999-11-10 sawtooth
ES03000810T ES2236626T3 (en) 1999-11-10 1999-11-10 SIERRA TEETH WIRE.
EP99122418A EP1099783B1 (en) 1999-11-10 1999-11-10 Saw-toothed wire
AT03000810T ATE291652T1 (en) 1999-11-10 1999-11-10 SAW TOOTH WIRE
JP2000328259A JP2001162440A (en) 1999-11-10 2000-10-27 Sawtooth wire
TW089122983A TW522183B (en) 1999-11-10 2000-11-01 Sawtooth wire
CA002325508A CA2325508A1 (en) 1999-11-10 2000-11-08 Sawtooth wire
BR0005315-5A BR0005315A (en) 1999-11-10 2000-11-09 Sawtooth wire
MXPA00011036A MXPA00011036A (en) 1999-11-10 2000-11-09 Saw-toothed wire.
TR2000/03334A TR200003334A2 (en) 1999-11-10 2000-11-10 Saw-braces.
US10/366,210 US20030116006A1 (en) 1999-11-10 2003-02-13 Sawtooth wire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99122418A EP1099783B1 (en) 1999-11-10 1999-11-10 Saw-toothed wire

Related Child Applications (1)

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EP03000810A Division EP1318218B1 (en) 1999-11-10 1999-11-10 Saw-toothed wire

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EP1099783A1 EP1099783A1 (en) 2001-05-16
EP1099783B1 true EP1099783B1 (en) 2003-07-30

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US (1) US20030116006A1 (en)
EP (2) EP1099783B1 (en)
JP (1) JP2001162440A (en)
AT (2) ATE291652T1 (en)
BR (1) BR0005315A (en)
CA (1) CA2325508A1 (en)
DE (3) DE29924404U1 (en)
ES (2) ES2200455T3 (en)
MX (1) MXPA00011036A (en)
TR (1) TR200003334A2 (en)
TW (1) TW522183B (en)

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Also Published As

Publication number Publication date
TR200003334A3 (en) 2001-06-21
EP1318218A1 (en) 2003-06-11
ES2200455T3 (en) 2004-03-01
ATE246272T1 (en) 2003-08-15
DE59906445D1 (en) 2003-09-04
EP1318218B1 (en) 2005-03-23
BR0005315A (en) 2001-06-12
ES2236626T3 (en) 2005-07-16
CA2325508A1 (en) 2001-05-10
MXPA00011036A (en) 2003-04-25
EP1099783A1 (en) 2001-05-16
JP2001162440A (en) 2001-06-19
DE29924404U1 (en) 2003-02-06
TW522183B (en) 2003-03-01
TR200003334A2 (en) 2001-06-21
DE59911815D1 (en) 2005-04-28
US20030116006A1 (en) 2003-06-26
ATE291652T1 (en) 2005-04-15

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