EP0874931A1 - Process for producing a heald shaft for weaving shafts out of a metal hollow section - Google Patents

Process for producing a heald shaft for weaving shafts out of a metal hollow section

Info

Publication number
EP0874931A1
EP0874931A1 EP97914065A EP97914065A EP0874931A1 EP 0874931 A1 EP0874931 A1 EP 0874931A1 EP 97914065 A EP97914065 A EP 97914065A EP 97914065 A EP97914065 A EP 97914065A EP 0874931 A1 EP0874931 A1 EP 0874931A1
Authority
EP
European Patent Office
Prior art keywords
profile
producing
height
heald shaft
heald
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.)
Granted
Application number
EP97914065A
Other languages
German (de)
French (fr)
Other versions
EP0874931B1 (en
Inventor
Manfred Spitzer
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.)
Schmeing GmbH and Co Firma
Original Assignee
Schmeing GmbH and Co Firma
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 claimed from DE19625076A external-priority patent/DE19625076C2/en
Application filed by Schmeing GmbH and Co Firma filed Critical Schmeing GmbH and Co Firma
Publication of EP0874931A1 publication Critical patent/EP0874931A1/en
Application granted granted Critical
Publication of EP0874931B1 publication Critical patent/EP0874931B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • D03C9/0625—Composition or used material
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49995—Shaping one-piece blank by removing material

Definitions

  • the invention relates to a method for producing a shaft rod for heald frames according to the preamble of
  • Light and rigid heald frames are for high-performance looms with up to 2,000 weft entries / min. required. Only with light heald frame systems can accelerations be achieved with economically justifiable energy expenditure, which make the highest picking performance possible. Shaft rods that are as rigid as possible are required for a trouble-free weaving process.
  • heald frames are proposed, the upper and lower rods of which are from a combination ⁇ on steel profiles, steel foils and lightweight frame structures. Heald frames made from these profiles are somewhat lighter than comparable heald frames made from aluminum, but the bending stiffness is somewhat lower and the price is about twice as high.
  • US Pat. No. 3,754,577 proposes to provide cladding with rails or foils made of steel or carbon fibers in partial areas of extruded profiles, which are intended to increase the bending stiffness.
  • the Austrian patent specification 25 82 24 proposes to use a single hollow profile made of steel or aluminum in a relatively low overall height as the base shaft rod.
  • a support on two supports expediently has the greatest moments of inertia in the area of the highest tensions.
  • the Austrian patent specification 25 82 24 proposes to use a single hollow profile made of steel or aluminum in a relatively low overall height as the base shaft rod.
  • the web height in the middle can be made variable according to the heald length or analogous to the load.
  • Center supports are an extremely unpleasant aid for reducing the profile deflection because they hinder handling in the drawing-in and often lead to defective fabrics and thread breaks during the weaving process.
  • the object of the present invention is to produce a heald frame which does not require a center support even with large machine widths, the heald frame weight still being within the limits prescribed by the looms and heald frame manufacturers and finally an economical production method is to be proposed which can be carried out with recyclable materials.
  • a light metal extrusion profile is proposed as a shaft rod that the height of the maximum required profile height of the shaft rod corresponds to that the basic profile must be as high as is required for an acceptable deflection of the shaft rod in the middle
  • the determined profile height is thus considerably higher for a heald frame without a center socket than is the case with profiles usually used for shaft rods with a middle socket.
  • this relatively high shaft rod is machined from the center to both sides, so that save the weight without impairing the dynamic performance of the shaft rod
  • a one-piece, preferably aluminum extruded profile is proposed which, apart from the taper towards the ends, requires no further processing
  • the additional, preferably machining, to reduce the profile weight can be carried out inexpensively in the course of the other machining operations on a programmable machining center in one clamping
  • the additional material expenditure for the higher extruded profile causes only a fraction of the costs which otherwise arise from the use of complicated profile structures in hybrid construction, carbon fiber or complex reinforcement measures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention concerns a process for producing a heald shaft for weaving shafts out of a metal hollow section, the height of which diminishes towards the ends on both sides. A light-weight extruded metal section is selected and adjusted to the maximal height of the section of a heald shaft without center support, whereupon the heald shaft is reduced towards both of its ends.

Description

"Verfahren zur Herstellung eines Schaftstabes für Webschäfte aus einem Metallhohlprofil" "Method for producing a shaft rod for heald frames from a hollow metal profile"
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung ei- nes Schaftstabes für Webschäfte gemäß dem Oberbegriff desThe invention relates to a method for producing a shaft rod for heald frames according to the preamble of
Hauptanspruches.Main claim.
Leichte und biegesteife Webschäfte sind für Hochleistungs¬ webmaschinen mit bis zu 2.000 Schußeintragungen/min. erfor- derlich. Nur mit leichten Webschaft-Litzen-Systemen lassen sich bei wirtschaftlich vertretbarem Energieaufwand Beschleunigun¬ gen erreichen, die höchste Schußeintragungleistungen möglich machen. Für einen störungsfreien Webprozeß sind möglichst biegesteife Schaftstäbe erforderlich.Light and rigid heald frames are for high-performance looms with up to 2,000 weft entries / min. required. Only with light heald frame systems can accelerations be achieved with economically justifiable energy expenditure, which make the highest picking performance possible. Shaft rods that are as rigid as possible are required for a trouble-free weaving process.
In der Vergangenheit hat man den fortlaufenden Leistungsstei¬ gerungen der Webmaschinen bei Webschäften dadurch Rech¬ nung getragen, daß man die Schaftstabquerschnitte im wesent¬ lichen in der Höhe zur Reduzierung der größer werdenden Durchbiegung vergrößert hat. Da in der Regel Strangpreßprofile für die Schaftstäbe verwendet werden, sind dieser Vorgehens- weise durch die ebenfalls erheblich zunehmenden Profilgewich¬ te Grenzen gesetzt. Weiter zunehmende Webschaftgewichte machen Verstärkungen der Webschaft-Antriebsmittel und einen erheblich höheren Energieaufwand erforderlich und somit weite- re Steigerungen der Schußeintragsleistungen unwirtschaftlich.In the past, the continuous increases in performance of the looms in heald frames have been taken into account by increasing the height of the shaft rod cross sections in order to reduce the increasing deflection. Since extruded profiles are generally used for the shaft rods, this procedure is wise set by the likewise significantly increasing profile weights. Increasing heald frame weights require reinforcements of the heald frame drive means and a considerably higher energy expenditure, and further increases in the weft insertion performance are therefore uneconomical.
Die DE 39 37 657 A 1 zeigt, daß zur Lösung dieses Problemes heute Webschäfte eingesetzt werden, bei denen die Schaftstä¬ be aus Kohlefasern oder Kohlefaserhybrid-Werkstoffen beste- hen. Vorteile sind eindeutig Leichtgewicht und entsprechend dem hohen E-Modul eine hohe Biegefestigkeit, verglichen mit einem gleich hohen Strangpreßprofil aus Aluminium. Erheblicher Nachteil dieses Vorschlages ist der vielfach höhere Preis ge¬ genüber einem vergleichbaren Aluminiumprofil sowie die unge- klärte Entsorgung verbrauchter Webschäfte.DE 39 37 657 A1 shows that heald frames in which the shaft rods are made of carbon fibers or carbon fiber hybrid materials are used today to solve this problem. The advantages are clearly lightweight and, due to the high modulus of elasticity, a high level of flexural strength compared to an equally high extruded profile made of aluminum. A considerable disadvantage of this proposal is the much higher price compared to a comparable aluminum profile and the unexplained disposal of used heald frames.
In den nachfolgenden Literaturstellen, nämlich EP 496 054 A 1 , DE 36 21 145 A 1 und DE 37 02 524 C 2, wird eine andere Pro¬ blemlösung vorgeschlagen, nämlich es werden Webschäfte vor- geschlagen, deren Ober- und Unterstäbe aus einer Kombinati¬ on von Stahlprofilen, Stahlfolien und Leichtbaurahmenstrukturen bestehen. Webschäfte aus diesen Profilen sind etwas leichter als vergleichbare Webschäfte aus Aluminium, jedoch ist die Biegesteif igkeit etwas geringer und der Preis etwa doppelt so hoch.In the following references, namely EP 496 054 A1, DE 36 21 145 A1 and DE 37 02 524 C2, another problem solution is proposed, namely heald frames are proposed, the upper and lower rods of which are from a combination ¬ on steel profiles, steel foils and lightweight frame structures. Heald frames made from these profiles are somewhat lighter than comparable heald frames made from aluminum, but the bending stiffness is somewhat lower and the price is about twice as high.
Schließlich wird in der US - Patentschrift 37 54 577 vorgeschla¬ gen, in Teilbereichen von stranggepreßten Profilen Beplankun¬ gen mit Schienen oder Folien aus Stahl bzw. Kohlefasern vorzu- sehen, welche die Biegesteifigkeit erhöhen sollen.Finally, US Pat. No. 3,754,577 proposes to provide cladding with rails or foils made of steel or carbon fibers in partial areas of extruded profiles, which are intended to increase the bending stiffness.
Alle diese vorgeschlagenen und teilweise auch praktizierten Problemlösungen ignorieren den Stand der Technik, der be¬ sagt, daß ein Träger auf zwei Stützten sinnvollerweise im Be- reich der höchsten Spannungen die größten Flächenträgheits¬ momente aufzuweisen hat. Hierzu wird in der österreichischen Patentschrift 25 82 24 vor¬ geschlagen, ein einziges Hohlprofil aus Stahl oder Aluminium in einer relativ niedrigen Bauhöhe als Basis-Schaftstab einzuset- zen. Durch am Schaftstabrücken befestigte z. B. geschraubte, genietete oder geschweißte Stege, die von den Profilenden zur Mitte hin in der Höhe zunehmen, wird bei möglichst minimaler Gewichtszunahme eine höhere Biegesteifigkeit angestrebt und erreicht. Die Steghöhe in der Mitte kann entsprechend der Web- schaftlänge bzw. analog der Belastung variabel ausgeführt wer¬ den. Auch dieser an sich ideale Webschaftaufbau hat sich aber aus Kostengründen in der Praxis nicht bewährt, da offensichtlich das Herstellungsverfahren zu teuer ist und die Anpassung an die Vielzahl der vorkommenden Einsatzfälle Schwierigkeiten be- reitet.All of these proposed and in some cases also practiced problem solutions ignore the prior art, which means that a support on two supports expediently has the greatest moments of inertia in the area of the highest tensions. For this purpose, the Austrian patent specification 25 82 24 proposes to use a single hollow profile made of steel or aluminum in a relatively low overall height as the base shaft rod. By attached to the stem bar z. B. screwed, riveted or welded webs, which increase in height from the profile ends towards the center, a higher bending stiffness is aimed for and achieved with as little weight gain as possible. The web height in the middle can be made variable according to the heald length or analogous to the load. Even this ideal heald frame construction has not proven itself in practice for reasons of cost, since the manufacturing process is obviously too expensive and the adaptation to the large number of possible uses presents difficulties.
Eine andere Lösung sieht vor, daß bei nicht mehr zulässigen Schaftgewichten und bei Webschaftlängen ab 250 cm Nennbrei¬ te häufig eine oder mehrere sogenannte Mittelstützen zwischen dem oberen und unteren Schaftprofil montiert werden. DieseAnother solution provides that in the case of shaft weights that are no longer permissible and with heald frame lengths from 250 cm nominal width, one or more so-called center supports are often mounted between the upper and lower shaft profiles. This
Mittelstützen sind ein äußerst unangenehmes Hilfsmittel zur Re¬ duzierung der Profildurchbiegung, denn sie behindern die Handhabung in der Einzieherei und führen häufig beim Webpro¬ zeß zu fehlerhaften Geweben und Fadenbrüchen.Center supports are an extremely unpleasant aid for reducing the profile deflection because they hinder handling in the drawing-in and often lead to defective fabrics and thread breaks during the weaving process.
Aufgabe der vorliegenden Erfindung ist, einen Webschaft zu fertigen, der auch bei großen Maschinenbreiten keine Mittelstüt¬ ze benötigt, wobei weiterhin das Webschaftgewicht in den von den Webmaschinen und Schaftmaschinenherstellern vorge- schriebenen Grenzen liegt und schließlich soll ein wirtschaftli¬ ches Fertigungsverfahren vorgeschlagen werden, das mit wie¬ derverwertbaren Werkstoffen durchgeführt werden kann.The object of the present invention is to produce a heald frame which does not require a center support even with large machine widths, the heald frame weight still being within the limits prescribed by the looms and heald frame manufacturers and finally an economical production method is to be proposed which can be carried out with recyclable materials.
Diese der Erfindung zugrundeliegende Aufgabe wird durch die Lehre des Hauptanspruches gelöst. Vorteilhafte Ausgestaltungen sind in den Unteranspruche erläu¬ tertThis object on which the invention is based is achieved by the teaching of the main claim. Advantageous configurations are explained in the subclaims
Mit anderen Worten ausgedruckt, wird ein Leichtmetallstrang- preßprofil als Schaftstab vorgeschlagen, daß in seiner Höhe der maximal erforderlichen Profilhohe des Schaftstabes ent¬ spricht D h das Basisprofil muß so hoch sein, wie es für eine noch akzeptable Durchbiegung des Schaftstabes in seiner Mitte erforderlich ist Die ermittelte Profilhohe liegt so für einen mit- telstutzenlosen Webschaft erheblich hoher als die bei zur Zeit üblicherweise verwendeten Profilen für Schaftstabe mit Mittel¬ stutze Weiterhin wird vorgesehen, daß dieser relativ hohe Schaftstab von der Mitte aus zu beiden Seiten hm verjungend bearbeitet wird, um so das Gewicht zu sparen, ohne daß dabei die dynamische Leistungsfähigkeit des Schaftstabes beein¬ trächtigt wirdIn other words, a light metal extrusion profile is proposed as a shaft rod that the height of the maximum required profile height of the shaft rod corresponds to that the basic profile must be as high as is required for an acceptable deflection of the shaft rod in the middle The determined profile height is thus considerably higher for a heald frame without a center socket than is the case with profiles usually used for shaft rods with a middle socket. Furthermore, it is provided that this relatively high shaft rod is machined from the center to both sides, so that save the weight without impairing the dynamic performance of the shaft rod
Es wird ein einteiliges, vorzugsweise Aluminium-Strang- preßprofil vorgeschlagen, das außer der Verjüngung zu den En- den hin keiner weiteren Bearbeitung bedarfA one-piece, preferably aluminum extruded profile is proposed which, apart from the taper towards the ends, requires no further processing
Da die Schaftprofile durch die verjungende Bearbeitung zwecks Gewichtsreduzierung teilsweise offene Profilkammern erhalten, werden, wenn erforderlich, diese offenen Kammern am oberen Schaftstab mit Leichtbaustoffen verschlossen, so daß dadurch gewahrleistet wird, daß z B bei Baumwollwebern sich in dem offenen Profilrucken keine Ansammlungen von Faserflocken bil¬ den können, die zu irgendeinem Zeitpunkt in die Webstoffe fal¬ len und zu Störungen bzw zu Gewebefehlern fuhrenSince the shaft profiles are partially opened by the tapering processing for weight reduction, if necessary, these open chambers on the upper shaft rod are closed with lightweight materials, so that it is ensured that, for example, there is no accumulation of fiber flakes in the open profile jerking of cotton weavers ¬ those who fall into the woven fabrics at any time and lead to faults or fabric defects
Die zusatzliche vorzugweise spanabhebende Bearbeitung zur Reduzierung des Profilgewichtes kann im Zuge der anderen Be¬ arbeitungvorgange auf einen programmierbaren Bearbeitungs¬ zentrum in einer Aufspannung kostengünstig durchgeführt wer- den Der Material-Mehraufwand für das höhere Strangpreßprofil ver¬ ursacht nur Bruchteile der Kosten, die durch die Verwendung von komplizierten Profilaufbauten in Hybridbauweise, aus Kohle- fasem oder aufwendigen Verstärkungsmaßnahmen sonst ent¬ stehen. The additional, preferably machining, to reduce the profile weight can be carried out inexpensively in the course of the other machining operations on a programmable machining center in one clamping The additional material expenditure for the higher extruded profile causes only a fraction of the costs which otherwise arise from the use of complicated profile structures in hybrid construction, carbon fiber or complex reinforcement measures.

Claims

Patentansprüche: Claims:
1. Verfahren zur Herstellung eines Schaftstabes für Web¬ schäfte aus einem Metallhohlprofil, dessen Höhe zu seinen beiden seitlichen Enden hin abnimmt, dadurch gekenn¬ zeichnet, daß ein Leichtmetallstrangpreßprofil hinsichtlich seiner Profilhöhe der maximalen Profilhöhe eines Schafts¬ tabes ohne Mittelstütze angepaßt ausgewählt wird und an¬ schließend zu seinen beiden seitlichen Enden hin sich verjüngend bearbeitet wird.1. A method for producing a shaft rod for heald frames from a hollow metal profile, the height of which decreases towards its two lateral ends, characterized in that a light metal extruded profile is selected in terms of its profile height to match the maximum profile height of a shaft table without a central support and to ¬ closing is tapered towards its two lateral ends.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet , daß die durch die Bearbeitung bedingten offenen Profilkam¬ mern des oberen Schaftstabes nach dem Bearbeitungs- Vorgang verschlossen werden.2. The method according to claim 1, characterized in that the open Profilkam¬ mern caused by the processing of the upper shaft rod are closed after the processing operation.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß als Verschlußmittel Leichtbaustoffe eingesetzt werden. 3. The method according to claim 2, characterized in that lightweight materials are used as a closure.
EP97914065A 1996-01-13 1997-01-10 Process for producing a heald shaft for weaving shafts out of a metal hollow section Expired - Lifetime EP0874931B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19601116 1996-01-13
DE19601116 1996-01-13
DE19625076 1996-06-22
DE19625076A DE19625076C2 (en) 1996-01-13 1996-06-22 Process for producing a heald frame for heald frames from a hollow metal profile
PCT/DE1997/000078 WO1997025465A1 (en) 1996-01-13 1997-01-10 Process for producing a heald shaft for weaving shafts out of a metal hollow section

Publications (2)

Publication Number Publication Date
EP0874931A1 true EP0874931A1 (en) 1998-11-04
EP0874931B1 EP0874931B1 (en) 1999-07-28

Family

ID=26022049

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97914065A Expired - Lifetime EP0874931B1 (en) 1996-01-13 1997-01-10 Process for producing a heald shaft for weaving shafts out of a metal hollow section

Country Status (5)

Country Link
US (1) US6076250A (en)
EP (1) EP0874931B1 (en)
JP (1) JP2000503074A (en)
CN (1) CN1045641C (en)
WO (1) WO1997025465A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10325908B4 (en) * 2003-06-05 2005-07-21 Groz-Beckert Kg Shaft rod, heald frame and method for producing a shaft rod
DE10326123B4 (en) * 2003-06-06 2007-01-04 Groz-Beckert Kg Shaft rod, manufacturing process for this and weave shank
DE102004055381B3 (en) * 2004-11-17 2006-04-06 Groz-Beckert Kg Shaft rod for heald frames
DE102004059319A1 (en) * 2004-12-02 2006-06-08 Picanol N.V. heald

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9603A (en) * 1853-03-01 Improvement in looms
US1091751A (en) * 1913-03-12 1914-03-31 Pittsburgh Steel Products Co Method of forming axle-housings.
US3088496A (en) * 1960-11-08 1963-05-07 Cambridge Wire Cloth Loom harness
AT258224B (en) * 1965-05-19 1967-11-10 Grob & Co Ag Shank rod for heald frames
FR1498551A (en) * 1966-08-23 1967-10-20 Sulzer Ag Loom blade
CH525352A (en) * 1968-09-13 1972-07-15 Contraves Ag Rod with high flexural rigidity and use of the same
FR2077485B1 (en) * 1970-01-22 1973-05-25 Creuzet Robert
CS157896B1 (en) * 1971-09-10 1974-10-15
US3779288A (en) * 1972-06-14 1973-12-18 Rockwell International Corp Weft carrier guide
US4091844A (en) * 1977-02-25 1978-05-30 Pioneer Heddle And Reed Company Incorporated Loom harness
US4417462A (en) * 1980-08-28 1983-11-29 Rockwell International Corporation Axle spindle and method for making the same
DE3609964A1 (en) * 1986-03-25 1987-10-01 Egelhaaf C C Fa WEAVING WITH STAINLESS STEEL BARS FROM AN ALUMINUM PROFILE
DE3912733C1 (en) * 1989-04-19 1990-07-26 Kloecker-Entwicklungs-Gmbh, 4280 Borken, De
JPH0753556Y2 (en) * 1990-11-26 1995-12-13 池田物産株式会社 Back frame
EP0561840B1 (en) * 1990-12-20 1994-08-24 Audi Ag Central pillar for the bodywork of a passenger car
US6029353A (en) * 1997-06-05 2000-02-29 Anodizing, Inc. Method and products produced from splitting multi-void hollow tubing

Non-Patent Citations (1)

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Title
See references of WO9725465A1 *

Also Published As

Publication number Publication date
WO1997025465A1 (en) 1997-07-17
US6076250A (en) 2000-06-20
CN1045641C (en) 1999-10-13
EP0874931B1 (en) 1999-07-28
JP2000503074A (en) 2000-03-14
CN1185817A (en) 1998-06-24

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