EP0707104A2 - Procédé d'augmentation de la résistance des dents de peigne de tissage - Google Patents

Procédé d'augmentation de la résistance des dents de peigne de tissage Download PDF

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Publication number
EP0707104A2
EP0707104A2 EP95112663A EP95112663A EP0707104A2 EP 0707104 A2 EP0707104 A2 EP 0707104A2 EP 95112663 A EP95112663 A EP 95112663A EP 95112663 A EP95112663 A EP 95112663A EP 0707104 A2 EP0707104 A2 EP 0707104A2
Authority
EP
European Patent Office
Prior art keywords
reed
treatment
surface areas
lamellae
aging
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.)
Withdrawn
Application number
EP95112663A
Other languages
German (de)
English (en)
Other versions
EP0707104A3 (fr
Inventor
Klaus Dipl.-Ing. Meroth (Fh)
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.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier GmbH
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
Application filed by Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP0707104A2 publication Critical patent/EP0707104A2/fr
Publication of EP0707104A3 publication Critical patent/EP0707104A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60—Construction or operation of slay
    • D03D49/62—Reeds mounted on slay
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • D03D47/278—Guide mechanisms for pneumatic looms
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • Y10T428/12826—Group VIB metal-base component
    • Y10T428/12847—Cr-base component
    • Y10T428/12854—Next to Co-, Fe-, or Ni-base component

Definitions

  • the invention relates to a method for increasing the service life, in particular of reed lamellae by heat and thermochemical treatment.
  • Weaves for example for air jet weaving machines, consist of a large number of profiled weave lamellae arranged next to one another in an upper and a lower frame rail, hereinafter called lamellae.
  • the individual slats have on their one longitudinal edge two spaced apart projections which delimit a U-shaped recess.
  • the recesses form a channel which extends over its width and is open towards the fabric stop edge for guiding the weft thread.
  • the channel base furthest away from the fabric stop edge strikes the weft thread against the fabric edge.
  • the area of the weft insertion channel is exposed to special requirements with regard to wear behavior.
  • the reeds of rapier weaving machines in which the rapiers are guided by the reed, among other things, are subject to the same requirements.
  • Reeds whose lamellae are made of high-quality steel, have a service life of around 1000 operating hours, depending on which weft material is used as a weft thread. Then the reeds have to be exchanged for a new reed due to the wear of the slats.
  • the basic material used for the slats is decisive for the long service life of the reed. It is known that cold rolled strip steel of the grades X 12 CrNi 177, X 5 CrNiMo 1810 or X 7 CrNiAl 177 is used for lamellas and the lamellas are produced from them by punching. Slats made of such a material can be used for all types of weft threads, but due to the relatively low strength of about 1200 N / mm2, they only have a short service life, approx. 1000 operating hours.
  • a reed rod with a locally limited hardening zone is known, in which the front surface has such a hardened zone.
  • the hardening zone is to be achieved by either locally hardening the outer surfaces of the reed rod or by using a cheaper material with a thin layer of particularly hard material.
  • the cited DE-OS does not disclose how and how a locally wear-resistant surface is achieved on the reed bars.
  • In the invention published in 1973 according to The aforementioned DE-OS is a method for increasing the service life of reed lamellas, which did not meet the requirements placed on the reed lamellas, particularly with regard to the hardness values on the abrasively stressed surface areas.
  • a hard chrome layer of approximately 10 ⁇ m is applied to the fins, which can have a thickness of approximately 0.15 mm to 0.8 mm. This layer has a hardness of around 700 HV.
  • abrasive wefts such as jute, glass yarn, glass rowing
  • Fins that are hard chrome-plated must be treated after the chrome plating in order to smooth out the roughnesses that arise during the chrome plating process on the surfaces of the U-shaped recess of the fin.
  • the aftertreatments are also expensive.
  • chromium oxide (Cr2O3) constituents to the surface of machine parts of a weaving machine, for example strands, relay nozzles and leaf lamellae of reeds, which are made of stainless steel.
  • the method for coating consists in that the parts in question are immersed in a solution of a chromium-containing composition, for example in an aqueous solution of CrO3, or are coated by this. Subsequently, these parts are heated at a temperature of 500 to 600 ° C in a reaction treatment, so that a layer is formed on the surface of the parts, which contains Cr2O3 as the main component.
  • the CH-PS 671 034 also discloses that a porous ceramic layer can be formed on the surface of the machine parts by applying a coating of a chromium-containing composition containing abrasion-resistant particles, such as Al2O3 or SiO2 particles.
  • a chromium-containing composition containing abrasion-resistant particles such as Al2O3 or SiO2 particles.
  • the CH-PS process is intended to achieve hardness values of 500 HV or more on the surface.
  • chromium-containing layers can achieve a hardness of approximately 700 HV on the surface and such layers require post-treatment.
  • DLC diamond-like carbon film
  • the basic material of the reed slats is made of stainless steel.
  • an intermediate layer for example a titanium carbide alloy, is first applied to the lamella surface in question.
  • the DLC layer is applied by chemical vapor deposition, in which the parts to be coated are brought into contact with a hydrocarbon gas in a reaction space under a certain pressure and at a certain temperature. It has been shown in practice that even the layer applied to the surface of the lamellae does not have the expected wear resistance, fatigue strength and flexural fatigue strength.
  • the object of the invention is therefore to provide a method for increasing the service life of reed lamellae, which are preferably produced from the steel grades x 12 CrNi 177, X 5 CrNiMo 1810 or X 7 CrNiAl 177, by means of which the service life of the reed lamellae is a multiple compared to known methods can be increased and in which the hardness on the abrasively stressed surface areas is not achieved by surface coating.
  • the methods are intended to achieve a high degree of hardness in the areas of the lamella that are subject to wear, that is to say the edge areas, while the much larger area of the lamella remains unhardened.
  • a further improvement in the wear resistance in the relevant edge areas of the lamellae can be achieved if the according to the procedure.
  • the final hardness that can be achieved in the edge area of the lamella is around 1800 HV.
  • the reed and brake discs of weft brakes which preferably consist of cold-rolled steel strip of the aforementioned types and have a hard chrome layer, by ion implantation, e.g. of N atoms in the hard chrome layer, achieve a service life that is up to 5 times longer than that of the lamellae which only carry a hard chrome layer.
  • the illustrated reed lamella 1 forms the reed of an air jet loom with a plurality of such lamellae.
  • the outer contour of each of the two longitudinal legs 1a and 1b merges into a projection 2 and 3.
  • the two projections 2 and 3 delimit a recess 4, for example a U-shaped recess.
  • the recess 4 of the plurality of reed lamellae 1 forms the weft insertion channel in the reed.
  • the contour 4a of the recess 4 is exposed to high wear.
  • reed lamellae 1 consist of cold-rolled steel strip of the X 12 CrNi 177 type and are produced by punching, and to hold them together in a package 5.
  • the plate pack thus formed is gem in the manner shown.
  • Fig. 1 a reaction chamber, which is under a certain pressure (partial vacuum) supplied.
  • the plate pack is simply aged in the reaction chamber at a temperature> 480 ° C and for a period of about 8 hours.
  • the exposed surface contour 6 of the slats 1 is now exposed to the ionization of the nitrogen by glow discharge (plasma nitriding) while supplying a nitriding gas (nitrogen) parallel to the heat aging.
  • the nitrogen atoms diffuse into the exposed surface contour 6 and form a first hard edge layer 7 of approximately 0.1 mm.
  • the plate pack is then cooled to room temperature.
  • the lamellae 1 are subjected according to the invention to a treatment by ion implantation in an evacuated reaction space.
  • only the plasma nitrided contour 4a of the recess 4 is preferably implanted inons.
  • the duration of the ion implantation is about 4 hours.
  • a second and comparatively harder edge layer 8 of approximately 10 ⁇ m is formed.
  • FIG. 2 the hard edge layers 7 and 8 of the exposed surface contour 6 of the lamellae 1 are shown in the form of a micrograph.
  • the brake disks 9, 10 of a weft brake 11 shown in FIG. 3 have mutually opposite surfaces 9a, 10a between which the weft 12 is pulled.
  • the surfaces 9a and 10a are preferably provided with a hard chrome layer. In the case of weft brakes, it is particularly advantageous if the braking surfaces have high wear resistance.
  • the individual brake disks 9, 10 are made, for example, from a cold-rolled steel strip of the X 12 CrNi 177 type and hard-chromed on the inside after the manufacturing process.
  • the service life of these brake discs with a hardness of around 700 HV is approx. 1000 operating hours. It has surprisingly been found that ion implantation of the hard chromium-plated surfaces can achieve a service life that is up to 5 times longer than that of the hard chromium layer not treated by ion implantation.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Physical Vapour Deposition (AREA)
EP95112663A 1994-08-24 1995-08-11 Procédé d'augmentation de la résistance des dents de peigne de tissage Withdrawn EP0707104A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4429943 1994-08-24
DE4429943A DE4429943C1 (de) 1994-08-24 1994-08-24 Verfahren zur Standzeiterhöhung von Webblattlamellen

Publications (2)

Publication Number Publication Date
EP0707104A2 true EP0707104A2 (fr) 1996-04-17
EP0707104A3 EP0707104A3 (fr) 1997-10-08

Family

ID=6526392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95112663A Withdrawn EP0707104A3 (fr) 1994-08-24 1995-08-11 Procédé d'augmentation de la résistance des dents de peigne de tissage

Country Status (4)

Country Link
US (1) US5658394A (fr)
EP (1) EP0707104A3 (fr)
JP (1) JP2851568B2 (fr)
DE (1) DE4429943C1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3278201B2 (ja) 1992-06-24 2002-04-30 エア・ウォーター株式会社 表面が窒化硬化された織機用筬羽
GB9614303D0 (en) * 1996-07-08 1996-09-04 Nsk Rhp Europe Technology Co Ltd Surface treatment of bearing steels
TW373040B (en) * 1996-08-12 1999-11-01 Toshiba Corp Loom parts and loom using such parts
US6329670B1 (en) * 1999-04-06 2001-12-11 Micron Technology, Inc. Conductive material for integrated circuit fabrication
DE102005030632B4 (de) * 2005-07-01 2009-07-30 Groz-Beckert Kg Fadenschonende Weblitze

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2220859A1 (de) 1972-04-28 1973-12-13 Ver Seidenwebereien Ag Rietstab mit oertlich begrenzter haertungs-zone
CH671034A5 (fr) 1985-04-17 1989-07-31 Toshiba Kk
EP0550752A1 (fr) 1990-09-28 1993-07-14 Citizen Watch Co. Ltd. Peigne pour metier rapide

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51149960A (en) * 1975-06-19 1976-12-23 Toray Industries Reeds and method of making reeds
SU739131A1 (ru) * 1978-08-28 1980-06-05 Всесоюзный Научно-Исследовательский Институт Резинотехнического Машиностроения Способ азотировани деталей из конструкционной стали
FR2506339A1 (fr) * 1981-05-21 1982-11-26 Creusot Loire Methode de nitruration ionique d'une piece en acier deformee plastiquement au prealable
JPS6133887U (ja) * 1984-07-31 1986-03-01 敏一 大嶋 筬羽
JPS6159688U (fr) * 1984-09-20 1986-04-22
JPS62199851A (ja) * 1986-02-20 1987-09-03 旭化成株式会社 筬
JPH0213460A (ja) * 1988-06-30 1990-01-17 Mitsubishi Kasei Corp ポリカーボネート樹脂成形物の滅菌方法
JP2501062B2 (ja) * 1992-01-14 1996-05-29 大同ほくさん株式会社 ニッケル合金の窒化方法
US5226975A (en) * 1991-03-20 1993-07-13 Cummins Engine Company, Inc. Plasma nitride chromium plated coating method
JPH05231543A (ja) * 1992-02-18 1993-09-07 Hino Motors Ltd ピストンリング
US5447181A (en) * 1993-12-07 1995-09-05 Daido Hoxan Inc. Loom guide bar blade with its surface nitrided for hardening
JPH07196247A (ja) * 1993-12-29 1995-08-01 Daido Hoxan Inc 耐食性糸道規制ガイド

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2220859A1 (de) 1972-04-28 1973-12-13 Ver Seidenwebereien Ag Rietstab mit oertlich begrenzter haertungs-zone
CH671034A5 (fr) 1985-04-17 1989-07-31 Toshiba Kk
EP0550752A1 (fr) 1990-09-28 1993-07-14 Citizen Watch Co. Ltd. Peigne pour metier rapide

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"DIN Tasachenbuch 155, Stahl und Eisen Guetenorm 2", 1985, BEUTH VERLAG GMBH, BERLIN-KOELN, pages: 118 - 120

Also Published As

Publication number Publication date
JP2851568B2 (ja) 1999-01-27
DE4429943C1 (de) 1996-02-22
JPH0860495A (ja) 1996-03-05
US5658394A (en) 1997-08-19
EP0707104A3 (fr) 1997-10-08

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