EP0703299B1 - Procédé et appareil de durcissement des bords en aciers de skis - Google Patents

Procédé et appareil de durcissement des bords en aciers de skis Download PDF

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Publication number
EP0703299B1
EP0703299B1 EP95114322A EP95114322A EP0703299B1 EP 0703299 B1 EP0703299 B1 EP 0703299B1 EP 95114322 A EP95114322 A EP 95114322A EP 95114322 A EP95114322 A EP 95114322A EP 0703299 B1 EP0703299 B1 EP 0703299B1
Authority
EP
European Patent Office
Prior art keywords
ski
jet
cooling jet
edge
cooling
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
EP95114322A
Other languages
German (de)
English (en)
Other versions
EP0703299A1 (fr
Inventor
Herbert Ing. Hafner
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.)
Linde GmbH
Original Assignee
Linde 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 Linde GmbH filed Critical Linde GmbH
Publication of EP0703299A1 publication Critical patent/EP0703299A1/fr
Application granted granted Critical
Publication of EP0703299B1 publication Critical patent/EP0703299B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/04—Structure of the surface thereof
    • A63C5/048—Structure of the surface thereof of the edges
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/20—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for blades for skates
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/12—Making thereof; Selection of particular materials
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2221/00—Treating localised areas of an article
    • C21D2221/02—Edge parts

Definitions

  • the invention relates to a method for hardening ski steel edges, the Ski steel edge in the mounted state on the ski is successively heated by means of an energy beam directed directly at the ski steel edge and cooled by means of a cooling jet directed directly at the ski steel edge, as well as a device for Execution of the procedure.
  • ski steel edges It is known to harden ski steel edges by heat treatment. For this, the Ski steel edges heated up to a certain hardening temperature and then cooled. The ski steel edge is used to heat the ski steel edge for example, put in an oven before mounting on the ski and after Reach the desired curing temperature out of the oven removed and cooled with water.
  • this method is cumbersome and economically unsatisfactory.
  • ski steel edge assembled for example using a hot flame and then heating the ski to move over a water-cooled copper shoe around the edge of the ski steel cool down again.
  • the entire ski is heated inevitable, so that the brought into the ski during the manufacture of the ski Preload is at least partially lost.
  • Ski equipment can be affected by this treatment.
  • the desired hardness of the ski steel edge is not always achievable.
  • DE-A-4 000 744 discloses the hardening of ski steel edges in the mounted state on the ski, the steel edge being heated by means of a laser beam directed perpendicularly onto the underside of the steel edge and then by means of adjacent coupler strips arranged at a right angle or by means of a targeted air jet is cooled.
  • the present invention has for its object a method for Hardening of ski steel edges and a device for carrying out the method to make available, with which the ski steel edges are even more targeted and economical can be hardened without significantly influencing the other ski material.
  • This object is achieved on the procedural side in that the cooling jet a cryogenic liquefied gas in liquid and / or gaseous form and / or in form of snow contains.
  • any type of directional energy supply is blocked under an energy beam understand that leads to heating in the edge of the ski steel. Fall in particular including microwave fields, laser beams and plasma beams.
  • the ski on the one hand and the energy beam and the cooling jet on the other hand along the Longitudinal axis of the ski moved relative to each other, so that each longitudinal section of the Ski steel edge is first captured by the energy beam and then by the cooling jet.
  • the ski is expediently connected to the energy jet and the cooling jet moved past. In this way, the skis are treated like an assembly line enables larger quantities of skis in an economical way Can be subjected to hardening of the ski steel edge.
  • the energy beam is one generated in a plasma torch Plasma beam used.
  • Plasma rays can be generated by ionization of argon or Nitrogen or mixed gases are produced.
  • the ionization can an electrical discharge or by excitation with a high frequency electromagnetic field can be reached.
  • a suitable shape of the electrodes or a special design of the outlet nozzle of the plasma torch can narrow plasma beam can be produced.
  • thermal energy is introduced into the edge of the ski steel without this surrounding ski equipment is impaired.
  • the plasma jet is expediently set so that only the Ski steel edge, but not the adjacent ski material is caught by the plasma jet.
  • the diameter of the plasma jet at the outlet nozzle of the Plasma torch and the distance of the outlet nozzle from the edge of the ski steel matched that the plasma jet at most the width of the ski steel edge covers.
  • Inert gas mixture existing cooling jet used.
  • Inert gas Come as an inert gas in particular liquid nitrogen or liquid carbon dioxide and the like emerging cold gases in question. Due to the associated protective gas effect unwanted oxidation of the ski steel edge is reliably prevented.
  • the proposed cooling jet of gas and snow is one associated with a whole range of advantages.
  • the said cooling jet is relative simply by skillful relaxation conventionally in gas cylinders stored carbon dioxide can be generated.
  • a particularly intensive cooling of the acted area, especially on the snow particles in the Cooling jet is an essential part of the cooling effect.
  • the snow particles stick namely at the edge of the ski steel and evaporate while absorbing heat.
  • this cooling method is dry cooling. This means that no coolant residues on the edge of the ski steel after cooling remain because the carbon dioxide at normal ambient temperatures assumes gaseous state.
  • the cooling jet can be made particularly easily from pressurized, gaseous or liquid carbon dioxide by expansion through a standard nozzle with an exposed round opening.
  • cooling jet generation is, however, the Cooling jet of preferably gaseous, pressurized To gain carbon dioxide in such a way that the carbon dioxide has a slit-like Opening initially into a largely formed around this slot-like opening sealed off from the environment and having an outlet opening Expansion volume is expanded and the outlet opening from a Mixture of cold gas and snow particles existing cooling jet is discharged.
  • the Cooling jet of preferably gaseous, pressurized To gain carbon dioxide in such a way that the carbon dioxide has a slit-like Opening initially into a largely formed around this slot-like opening sealed off from the environment and having an outlet opening Expansion volume is expanded and the outlet opening from a Mixture of cold gas and snow particles existing cooling jet is discharged.
  • the slot nozzle with its narrow cross-sectional opening creates one Expansion gas jet with a significantly enlarged surface.
  • This enlarged Surface results in an increased interaction of the expansion gas jet with its environment, which is formed by an expansion volume in which almost exclusively expanded, cold carbon dioxide gas. Warmer Ambient air therefore has no direct access to the expanded Carbon dioxide. This means that initially only little heat from the environment the carbon dioxide can flow, so that in the expansion volume due to the there prevailing heat deficits an increased formation of carbon dioxide snow particles takes place. In comparison to an unshielded expansion, one becomes clear increased proportion of snow particles, which produces the desired strong cooling effect cause.
  • the gas / snow mixture created in the expansion volume is over formed the further course of the expansion volume into a cooling jet and steered through the outlet opening onto the edge of the ski steel.
  • Both the energy beam and the cooling jet are expediently applied to the edge of the ski steel edge facing away from the ski and the diameter of the Energy beam and the cooling jet set so that the ski itself from the Energy beam and is detected by the cooling jet. This ensures that the generated temperature change essentially on the outer edge of the ski steel edge limited, while the ski itself is not affected. It is coming namely, that the outer edge of the ski steel has the necessary hardness to ensure that the ski is the desired one over several years Keeps grip even on icy ski slopes.
  • the invention further relates to a device for performing the method with a Support for the ski in the form of angled planes that attach to the ski Ski steel edges surround the exposed outer surfaces, with bushings for the energy beam and the cooling jet being provided in the support.
  • This device is characterized in that the Implementations in Direction of the bisector of the angle formed by the angled planes Angle.
  • a plasma beam is expediently used as the energy beam.
  • the purpose in the area of the implementation for the energy beam is a plasma torch arranged, the outlet opening for the plasma jet in the direction of Execution points and points towards the edge of the ski steel edge facing away from the ski is.
  • This is in the area of implementation for the Cooling jet an expansion nozzle for the generation of a cold gas and snow particles having cooling jet arranged.
  • the expansion nozzle consists of an a carbon dioxide source connectable inner tube with a final slot nozzle as well as one that envelops the inner tube at the end of the slot nozzle protruding and an expansion volume forming outer tube, which at its the End facing away from the slot nozzle has an outlet opening for the cooling jet.
  • This Outlet opening for the cooling jet points in the direction of the passage for the Cooling jet and is directed towards the edge of the ski steel edge facing away from the ski.
  • Figures 2 and 3 show sections through the copper shoes shown in Figure 1 in the levels AA and BB.
  • Figure 4 shows an expansion nozzle for generating the cooling jet in section.
  • FIG. 5 shows a section through the expansion nozzle shown in FIG. 4 in the plane SS.
  • the copper slide shoe 1 in FIGS. 1 and 3 consists of copper sheets angled at right angles.
  • the ski to be machined is inserted in the direction of arrow 2 parallel to the longitudinal axis of the copper sliding block 1 between the two mirror-symmetrically arranged copper sliding blocks 1 in such a way that the ski steel edges rest on the lying legs of the copper sliding blocks 1 and laterally from the standing legs of the copper Slide shoes 1 are performed.
  • bushings 3 and 4 are for the cooling jet and Plasma beam arranged. Each longitudinal section of the ski steel edges passes with one Time delay first the plasma jet and then the cooling jet.
  • the cooling jet is generated using a carbon dioxide expansion nozzle.
  • an expansion nozzle 5 is arranged having for the generation of a cold gas and snow particles cooling jet in the region of the passage 3 for the cooling jet, in accordance with Figures 4 and 5 made of a connectable to a source of carbon dioxide inner tube 6 with final slot 7 and one the inner tube 6 at the slit nozzle end enveloping, projecting and forming an expansion volume outer tube 9, which has an outlet opening 10 for the cooling jet at its end facing away from the slot nozzle 7.
  • the outlet opening 10 for the cooling jet points in the direction of the passage 3 for the cooling jet and is directed towards the edge of the ski steel edge facing away from the ski.
  • the plasma jet is generated using a plasma torch.
  • a plasma torch 11 is arranged in the area of the feedthrough 4 for the energy beam, whose outlet opening for the plasma jet shows in the direction of bushing 4 and is directed towards the edge of the ski steel edge facing away from the ski.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Plasma Technology (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (9)

  1. Procédé de durcissement des carres en acier de skis, les carres en acier de skis étant chauffées à l'état monté sur le ski l'une après l'autre à l'aide d'un jet d'énergie dirigé directement sur la carre en acier du ski et étant refroidies à l'aide d'un jet de refroidissement dirigé également directement sur la carre en acier du ski, caractérisé en ce que le jet de refroidissement contient un gaz liquéfié à basse température sous forme de liquide et/ou de gaz et/ou sous forme de neige.
  2. Procédé selon la revendication 1, caractérisé en ce que le ski est déplacé, d'une part, et le jet d'énergie ainsi que le jet de refroidissement sont déplacés d'autre part le long de l'axe longitudinal du ski relativement les uns aux autres, de sorte que chaque section longitudinale de la carre en acier du ski soit d'abord touché par le jet d'énergie et ensuite par le jet de refroidissement.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'on utilise, en tant que jet d'énergie, un jet de plasma produit dans un chalumeau à plasma.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on utilise, en tant que jet de refroidissement, un mélange de gaz froid et de particules de neige.
  5. Procédé selon la revendication 4, caractérisé en ce que le jet de refroidissement est obtenu à partir de dioxyde de carbone de préférence gazeux, se trouvant sous surpression, et, cela, de telle manière que le dioxyde de carbone soit soumis à une expansion par l'intermédiaire d'un orifice en forme de fente, tout d'abord dans un volume d'expansion formé autour de cet orifice en forme de fente, isolé dans une large mesure par rapport à l'environnement et présentant un orifice de sortie, et que le jet de refroidissement, se composant d'un mélange de gaz froid et de particules de neige, soit évacué par l'intermédiaire de cet orifice de sortie.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'on dirige non seulement le jet d'énergie, mais aussi le jet de refroidissement sur la carre opposée au ski de la carre en acier du ski et que l'on règle le diamètre du jet d'énergie et du jet de refroidissement de sorte que le ski lui-même ne soit pas touché par le jet d'énergie et le jet de refroidissement.
  7. Dispositif en vue de l'exécution du procédé selon l'une quelconque des revendications 1 à 6, avec un support pour le ski sous la forme de plans (1) formant un certain angle, qui entourent les carres en acier du ski montées sur le ski aux surfaces externes dégagées, des passages (3, 4) étant prévus dans le support pour le jet d'énergie et le jet de refroidissement, caractérisé en ce que les passages (3, 4) sont dirigés en direction de la bissectrice de l'angle formé par les plans (1) formant un certain angle.
  8. Dispositif selon la revendication 7, caractérisé en ce que l'on dispose, dans le domaine du passage (4) pour le jet d'énergie, un chalumeau à plasma (11), dont l'orifice de sortie est orienté dans la direction du passage (4) pour le jet de plasma et est dirigé sur la carre opposée au ski de la carre en acier du ski.
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que l'on dispose, dans le domaine du passage (3) pour le jet de refroidissement, une buse d'expansion pour la production d'un jet de refroidissement présentant un gaz froid et des particules de neige, qui se compose d'un tube interne (6), que l'on peut raccorder à la source de dioxyde de carbone, avec une buse à fente terminale (7), ainsi que d'un tube externe (9) entourant le tube interne (6) à l'extrémité de la buse à fente (7), faisant saillie par rapport à ce dernier et formant un volume d'expansion, qui possède, à son extrémité opposée à la buse à fente (7), un orifice de sortie (10) pour le jet de refroidissement, et en ce que cet orifice de sortie (10) pour le jet de refroidissement est orienté en direction du passage (3) pour le jet de refroidissement et est dirigé sur la carre opposée au ski de la carre en acier du ski.
EP95114322A 1994-09-21 1995-09-12 Procédé et appareil de durcissement des bords en aciers de skis Expired - Lifetime EP0703299B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4433720 1994-09-21
DE4433720A DE4433720A1 (de) 1994-09-21 1994-09-21 Verfahren und Vorrichtung zum Härten von Skistahlkanten

Publications (2)

Publication Number Publication Date
EP0703299A1 EP0703299A1 (fr) 1996-03-27
EP0703299B1 true EP0703299B1 (fr) 1999-05-26

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Application Number Title Priority Date Filing Date
EP95114322A Expired - Lifetime EP0703299B1 (fr) 1994-09-21 1995-09-12 Procédé et appareil de durcissement des bords en aciers de skis

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EP (1) EP0703299B1 (fr)
AT (1) ATE180516T1 (fr)
DE (2) DE4433720A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10106273A1 (de) * 2001-02-01 2002-08-08 Sms Demag Ag Verfahren zum Beeinflussen des Profils von Walzband

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE697995C (de) * 1934-07-01 1940-10-29 Peddinghaus Paul Ferd Fa Verfahren und Vorrichtung zum Haerten der Oberflae
AT286152B (de) * 1968-08-23 1970-11-25 Boehler & Co Ag Geb Stahlkanten für Schier
BE791190A (fr) * 1971-11-10 1973-05-10 Ppg Industries Inc Trempe
DE2627791C2 (de) * 1976-06-22 1982-12-23 Fa. Paul Ferd. Peddinghaus, 5820 Gevelsberg Verfahren zum Oberflächenhärten von Werkstücken
DE3914573A1 (de) * 1989-05-03 1990-11-08 Linde Ag Verfahren zum flammstrahlen von oberflaechen
YU135290A (sh) * 1989-07-25 1992-12-21 Schuler, Albert Postopek kaljenja rezalnih robov žag, nožev in orodij za štancanje
DE4000744C2 (de) * 1990-01-12 1996-07-11 Trumpf Gmbh & Co Verfahren für Stahlkanten von Wintersportgeräten

Also Published As

Publication number Publication date
DE59506013D1 (de) 1999-07-01
ATE180516T1 (de) 1999-06-15
DE4433720A1 (de) 1996-03-28
EP0703299A1 (fr) 1996-03-27

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