EP0874931B1 - 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 Download PDFInfo
- Publication number
- EP0874931B1 EP0874931B1 EP97914065A EP97914065A EP0874931B1 EP 0874931 B1 EP0874931 B1 EP 0874931B1 EP 97914065 A EP97914065 A EP 97914065A EP 97914065 A EP97914065 A EP 97914065A EP 0874931 B1 EP0874931 B1 EP 0874931B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heald shaft
- producing
- profile
- height
- metal hollow
- 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
Links
- 238000000034 method Methods 0.000 title claims description 7
- 238000009941 weaving Methods 0.000 title claims description 5
- 229910052751 metal Inorganic materials 0.000 title claims description 4
- 239000002184 metal Substances 0.000 title claims description 4
- 239000004566 building material Substances 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004584 weight gain Effects 0.000 description 1
- 235000019786 weight gain Nutrition 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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 Main claim.
- Light and rigid heald frames are for high-performance looms with up to 2,000 weft entries / min. required. Only with light heald frame strand systems can Accelerations with economically justifiable energy consumption achieve the highest shot entry benefits possible do. For a trouble-free web process are possible rigid shaft rods required.
- heald frames are proposed, their top and bottom bars from a combination of steel profiles, steel foils and lightweight frame structures consist. Heald frames from these profiles are somewhat lighter than comparable heald frames made of aluminum, but the Bending stiffness a bit lower and the price about twice high.
- US Pat. No. 3,754,577 proposes planking in parts of extruded profiles to be provided with rails or foils made of steel or carbon fibers, which should increase the bending stiffness.
- Austrian patent specification 25 82 24 proposes a single hollow profile made of steel or aluminum a relatively low height as a basic shaft rod.
- stem bar z. B. screwed, riveted or welded bars that run from the profile ends to the Increasing the height in the middle becomes as minimal as possible Weight gain is aimed at a higher bending stiffness and reached.
- the ridge height in the middle can correspond to the heald frame length or can be carried out variably according to the load.
- this ideal heald frame construction also has itself not proven in practice for reasons of cost, because obviously the manufacturing process is too expensive and the adjustment to the large number of possible applications creates difficulties.
- the object of the present invention is to provide a heald frame manufacture that does not have a center support even with large machine widths required, with the heald frame weight still in the range from the weaving machines and dobby manufacturers There are limits and ultimately an economic one Manufacturing processes are proposed that are recyclable Materials can be carried out.
- a light metal extrusion profile proposed as a shaft rod that in its height corresponds to the maximum required profile height of the shaft rod. That is, the basic profile must be as high as it is for one still acceptable deflection of the shaft rod in the middle is required.
- the determined profile height is thus for a middle column Heald frame considerably higher than at present Usually used profiles for shaft rods with center support. It is also provided that this is relatively high Shank rod tapering from the center to both sides is processed so as to save weight without doing so the dynamic performance of the shaft rod is impaired becomes.
- shaft profiles are used for the purpose of tapering Weight reduction partly with open profile chambers, if necessary, these open chambers at the top Shaft rod closed with lightweight materials, so that it is ensured that z. B. in cotton weavers in the open backs of the profile do not form an accumulation of fiber flakes that fall into the fabrics at any time and lead to malfunctions or tissue defects.
- the additional preferably machining for The profile weight can be reduced in the course of the other machining operations to a programmable machining center can be carried out inexpensively in one setup.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Body Structure For Vehicles (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung eines Schaftstabes für Webschäfte gemäß dem Oberbegriff des Hauptanspruches.The invention relates to a method for producing a Shaft rod for heald frames according to the preamble of Main claim.
Leichte und biegesteife Webschäfte sind für Hochleistungswebmaschinen mit bis zu 2.000 Schußeintragungen/min. erforderlich. Nur mit leichten Webschaft-Litzen-Systemen lassen sich bei wirtschaftlich vertretbarem Energieaufwand Beschleunigungen 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 strand systems can Accelerations with economically justifiable energy consumption achieve the highest shot entry benefits possible do. For a trouble-free web process are possible rigid shaft rods required.
In der Vergangenheit hat man den fortlaufenden Leistungssteigerungen der Webmaschinen bei Webschäften dadurch Rechnung getragen, daß man die Schaftstabquerschnitte im wesentlichen in der Höhe zur Reduzierung der größer werdenden Durchbiegung vergrößert hat. Da in der Regel Strangpreßprofile für die Schaftstäbe verwendet werden, sind dieser Vorgehensweise durch die ebenfalls erheblich zunehmenden Profilgewichte Grenzen gesetzt. Weiter zunehmende Webschaftgewichte machen Verstärkungen der Webschaft-Antriebsmittel und einen erheblich höheren Energieaufwand erforderlich und somit weitere Steigerungen der Schußeintragsleistungen unwirtschaftlich.In the past, you have continuous performance improvements of the weaving machines in heald frames worn that the shaft rod cross-sections essentially in height to reduce the growing Deflection has increased. As a rule, extruded profiles for the shaft rods are this procedure due to the significantly increasing profile weights Set limits. Further increasing heald frame weights make reinforcements of the heald frame drive means and one considerably more energy is required and therefore more Increases in weft input services uneconomical.
Die DE 39 37 657 A 1 zeigt, daß zur Lösung dieses Problemes heute Webschäfte eingesetzt werden, bei denen die Schaftstäbe aus Kohlefasern oder Kohlefaserhybrid-Werkstoffen bestehen. 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 gegenüber einem vergleichbaren Aluminiumprofil sowie die ungeklärte Entsorgung verbrauchter Webschäfte.DE 39 37 657 A1 shows that to solve this problem heald frames are used today in which the shaft rods consist of carbon fibers or carbon fiber hybrid materials. Advantages are clearly lightweight and corresponding the high modulus of elasticity, a high flexural strength compared to an equally high extruded profile made of aluminum. More significant The disadvantage of this proposal is the much higher price compared to it a comparable aluminum profile as well as 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 Problemlösung vorgeschlagen, nämlich es werden Webschäfte vorgeschlagen, deren Ober- und Unterstäbe aus einer Kombination von Stahlprofilen, Stahlfolien und Leichtbaurahmenstrukturen bestehen. Webschäfte aus diesen Profilen sind etwas leichter als vergleichbare Webschäfte aus Aluminium, jedoch ist die Biegesteifigkeit etwas geringer und der Preis etwa doppelt so hoch.In the following references, namely EP 496 054 A1, DE 36 21 145 A 1 and DE 37 02 524 C 2 will be another problem solving proposed, namely heald frames are proposed, their top and bottom bars from a combination of steel profiles, steel foils and lightweight frame structures consist. Heald frames from these profiles are somewhat lighter than comparable heald frames made of aluminum, but the Bending stiffness a bit lower and the price about twice high.
Schließlich wird in der US - Patentschrift 37 54 577 vorgeschlagen, in Teilbereichen von stranggepreßten Profilen Beplankungen mit Schienen oder Folien aus Stahl bzw. Kohlefasern vorzusehen, welche die Biegesteifigkeit erhöhen sollen.Finally, US Pat. No. 3,754,577 proposes planking in parts of extruded profiles to be provided with rails or foils made of steel or carbon fibers, which should increase the bending stiffness.
Alle diese vorgeschlagenen und teilweise auch praktizierten Problemlösungen ignorieren den Stand der Technik, der besagt, daß ein Träger auf zwei Stützten sinnvollerweise im Bereich der höchsten Spannungen die größten Flächenträgheitsmomente aufzuweisen hat. All of these proposed and partly also practiced Problem solving ignores the state of the art that says that a beam on two supports makes sense in the area of the highest tensions the greatest moments of inertia has to show.
Hierzu wird in der österreichischen Patentschrift 25 82 24 vorgeschlagen, ein einziges Hohlprofil aus Stahl oder Aluminium in einer relativ niedrigen Bauhöhe als Basis-Schaftstab einzusetzen. 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 Webschaftlänge bzw. analog der Belastung variabel ausgeführt werden. 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 bereitet.For this purpose, the Austrian patent specification 25 82 24 proposes a single hollow profile made of steel or aluminum a relatively low height as a basic shaft rod. By attached to the stem bar z. B. screwed, riveted or welded bars that run from the profile ends to the Increasing the height in the middle becomes as minimal as possible Weight gain is aimed at a higher bending stiffness and reached. The ridge height in the middle can correspond to the heald frame length or can be carried out variably according to the load. However, this ideal heald frame construction also has itself not proven in practice for reasons of cost, because obviously the manufacturing process is too expensive and the adjustment to the large number of possible applications creates difficulties.
Eine andere Lösung sieht vor, daß bei nicht mehr zulässigen Schaftgewichten und bei Webschaftlängen ab 250 cm Nennbreite häufig eine oder mehrere sogenannte Mittelstützen zwischen dem oberen und unteren Schaftprofil montiert werden. Diese Mittelstützen sind ein äußerst unangenehmes Hilfsmittel zur Reduzierung der Profildurchbiegung, denn sie behindern die Handhabung in der Einzieherei und führen häufig beim Webprozeß zu fehlerhaften Geweben und Fadenbrüchen.Another solution provides that if no longer permissible Shank weights and for heald frame lengths from 250 cm nominal width often one or more so-called center supports between the upper and lower shaft profile. This Center supports are an extremely unpleasant aid for reduction the profile deflection because they hinder the Handling in the pull-in and often lead in the weaving process to faulty fabrics and thread breaks.
Aufgabe der vorliegenden Erfindung ist, einen Webschaft zu fertigen, der auch bei großen Maschinenbreiten keine Mittelstütze benötigt, wobei weiterhin das Webschaftgewicht in den von den Webmaschinen und Schaftmaschinenherstellern vorgeschriebenen Grenzen liegt und schließlich soll ein wirtschaftliches Fertigungsverfahren vorgeschlagen werden, das mit wiederverwertbaren Werkstoffen durchgeführt werden kann.The object of the present invention is to provide a heald frame manufacture that does not have a center support even with large machine widths required, with the heald frame weight still in the range from the weaving machines and dobby manufacturers There are limits and ultimately an economic one Manufacturing processes are proposed that are recyclable Materials can be carried out.
Diese der Erfindung zugrundeliegende Aufgabe wird durch die Lehre des Hauptanspruches gelöst. This object of the invention is achieved by Teaching of the main claim solved.
Vorteilhafte Ausgestaltungen sind in den Unteransprüche erläutert.Advantageous embodiments are explained in the subclaims.
Mit anderen Worten ausgedrückt, wird ein Leichtmetallstrangpreßprofil als Schaftstab vorgeschlagen, daß in seiner Höhe der maximal erforderlichen Profilhöhe des Schaftstabes entspricht. D. h. das Basisprofil muß so hoch sein, wie es für eine noch akzeptable Durchbiegung des Schaftstabes in seiner Mitte erforderlich ist. Die ermittelte Profilhöhe liegt so für einen mittelstützenlosen Webschaft erheblich höher als die bei zur Zeit üblicherweise verwendeten Profilen für Schaftstäbe mit Mittelstütze. Weiterhin wird vorgesehen, daß dieser relativ hohe Schaftstab von der Mitte aus zu beiden Seiten hin verjüngend bearbeitet wird, um so das Gewicht zu sparen, ohne daß dabei die dynamische Leistungsfähigkeit des Schaftstabes beeinträchtigt wird.In other words, a light metal extrusion profile proposed as a shaft rod that in its height corresponds to the maximum required profile height of the shaft rod. That is, the basic profile must be as high as it is for one still acceptable deflection of the shaft rod in the middle is required. The determined profile height is thus for a middle column Heald frame considerably higher than at present Usually used profiles for shaft rods with center support. It is also provided that this is relatively high Shank rod tapering from the center to both sides is processed so as to save weight without doing so the dynamic performance of the shaft rod is impaired becomes.
Es wird ein einteiliges, vorzugsweise Aluminium-Strangpreßprofil vorgeschlagen, das außer der Verjüngung zu den Enden hin keiner weiteren Bearbeitung bedarf.It becomes a one-piece, preferably aluminum extruded profile suggested that except the taper to the ends no further processing is required.
Da die Schaftprofile durch die verjüngende Bearbeitung zwecks Gewichtsreduzierung teilsweise offene Profilkammem erhalten, werden, wenn erforderlich, diese offenen Kammern am oberen Schaftstab mit Leichtbaustoffen verschlossen, so daß dadurch gewährleistet wird, daß z. B. bei Baumwollwebern sich in dem offenen Profilrücken keine Ansammlungen von Faserflocken bilden können, die zu irgendeinem Zeitpunkt in die Webstoffe fallen und zu Störungen bzw. zu Gewebefehlern führen.Because the shaft profiles are used for the purpose of tapering Weight reduction partly with open profile chambers, if necessary, these open chambers at the top Shaft rod closed with lightweight materials, so that it is ensured that z. B. in cotton weavers in the open backs of the profile do not form an accumulation of fiber flakes that fall into the fabrics at any time and lead to malfunctions or tissue defects.
Die zusätzliche vorzugweise spanabhebende Bearbeitung zur Reduzierung des Profilgewichtes kann im Zuge der anderen Bearbeitungvorgänge auf einen programmierbaren Bearbeitungszentrum in einer Aufspannung kostengünstig durchgeführt werden. The additional preferably machining for The profile weight can be reduced in the course of the other machining operations to a programmable machining center can be carried out inexpensively in one setup.
Der Material-Mehraufwand für das höhere Strangpreßprofil verursacht nur Bruchteile der Kosten, die durch die Verwendung von komplizierten Profilaufbauten in Hybridbauweise, aus Kohlefasem oder aufwendigen Verstärkungsmaßnahmen sonst entstehen.The additional material expense for the higher extrusion profile caused only a fraction of the cost of using it of complicated profile structures in hybrid construction, made of carbon fiber or expensive reinforcement measures otherwise arise.
Claims (3)
- Process for producing a heald shaft for weaving shafts out of a metal hollow section, the height of which decreases towards its two lateral ends, characterized in that a light-metal extruded section is selected with respect to its section height, adapted to the maximum section height of a heald shaft without central support, and is subsequently worked to make it taper towards its two lateral ends.
- Process according to Claim 1, characterized in that the open section chambers of the upper heald shaft which are caused by the working are closed after the working operation.
- Process according to Claim 2, characterized in that lightweight building materials are used as closure means.
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 EP0874931A1 (en) | 1998-11-04 |
| EP0874931B1 true 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)
| 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)
| 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 |
| WO1992011158A1 (en) * | 1990-12-20 | 1992-07-09 | 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 |
-
1997
- 1997-01-10 EP EP97914065A patent/EP0874931B1/en not_active Expired - Lifetime
- 1997-01-10 US US09/011,936 patent/US6076250A/en not_active Expired - Fee Related
- 1997-01-10 WO PCT/DE1997/000078 patent/WO1997025465A1/en active IP Right Grant
- 1997-01-10 CN CN97190263A patent/CN1045641C/en not_active Expired - Fee Related
- 1997-01-10 JP JP9524760A patent/JP2000503074A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN1185817A (en) | 1998-06-24 |
| EP0874931A1 (en) | 1998-11-04 |
| WO1997025465A1 (en) | 1997-07-17 |
| US6076250A (en) | 2000-06-20 |
| JP2000503074A (en) | 2000-03-14 |
| CN1045641C (en) | 1999-10-13 |
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