EP0703299B1 - Verfahren und Vorrichtung zum Härten von Skistahlkanten - Google Patents
Verfahren und Vorrichtung zum Härten von Skistahlkanten Download PDFInfo
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 53
- 239000010959 steel Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 64
- 239000002245 particle Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 36
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 18
- 239000001569 carbon dioxide Substances 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052802 copper Inorganic materials 0.000 abstract description 11
- 239000010949 copper Substances 0.000 abstract description 11
- 239000007789 gas Substances 0.000 description 17
- 238000010438 heat treatment Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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.
Landscapes
- 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)
- Heat Treatment Of Articles (AREA)
- Carbon And Carbon Compounds (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Description
Claims (9)
- Verfahren zum Härten von Skistahlkanten, wobei die Skistahlkante in auf dem Ski montiertem Zustand nacheinander mittels eines direkt auf die Skistahlkante gerichteten Energiestrahls aufgeheizt und mittels eines ebenfalls direkt auf die Skistahlkante gerichteten Kühlstrahls abgekühlt wird, dadurch gekennzeichnet, daß der Kühlstrahl ein tiefkalt verflüssigtes Gas in flüssiger und/oder gasförmiger Form und/oder in Form von Schnee enthält.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Ski einerseits und der Energiestrahl sowie der Kühlstrahl andererseits entlang der Längsachse des Skis relativ zueinander bewegt werden, so daß jeder Längsabschnitt der Skistahlkante zuerst vom Energiestrahl und dann vom Kühlstrahl erfaßt wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß als Energiestrahl ein in einem Plasmabrenner erzeugter Plasmastrahl verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß als Kühlstrahl ein Gemisch aus Kaltgas und Schneepartikeln eingesetzt wird.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß der Kühlstrahl aus vorzugsweise gasförmigem, unter einem Überdruck stehenden Kohlendioxid gewonnen wird und zwar derart, daß das Kohlendioxid über eine schlitzartige Öffnung zunächst in ein um diese schlitzartige Öffnung ausgebildetes, weitgehend gegen die Umgebung abgeschlossenes und eine Austrittsöffnung aufweisendes Expansionsvolumen expandiert wird und über diese Austrittsöffnung der aus einem Gemisch aus Kaltgas und Schneepartikeln bestehende Kühlstrahl abgeführt wird.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß sowohl der Energiestrahl als auch der Kühlstrahl auf die vom Ski abgewandte Kante der Skistahlkante gerichtet werden und die Durchmesser des Energiestrahls und des Kühlstrahls so eingestellt werden, daß der Ski selbst nicht vom Energiestrahl und Kühlstrahl erfaßt wird.
- Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 6 mit einer Auflage für den Ski in Form von abgewinkelten Ebenen (1), die die am Ski montierten Skistahlkanten an den freiliegenden Außenflächen umgeben, wobei in der Auflage Durchführungen (3, 4) für Energiestrahl und den Kühlstrahl vorgesehen sind, dadurch gekennzeichnet, daß die Durchführungen (3, 4) in Richtung der Winkelhalbierenden des durch die abgewinkelten Ebenen (1) gebildeten Winkels zeigen.
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß im Bereich der Durchführung (4) für den Energiestrahl ein Plasmabrenner (11) angeordnet ist, dessen Austrittsöffnung für den Plasmastrahl in Richtung der Durchführung (4) zeigt und auf die vom Ski abgewandte Kante der Skistahlkante gerichtet ist.
- Vorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß im Bereich der Durchführung (3) für den Kühlstrahl eine Expansionsdüse für die Erzeugung eines Kaltgas und Schneepartikel aufweisenden Kühlstrahles angeordnet ist, die aus einem an eine Kohlendioxidquelle anschließbaren Innenrohr (6) mit abschließender Schlitzdüse (7) sowie einem das Innenrohr (6) am Ende der Schlitzdüse (7) umhüllenden, darüber hinaus ragenden und ein Expansionsvolumen bildenden Außenrohr (9), das an seinem der Schlitzdüse (7) abgewandten Ende eine Austrittsöffnung (10) für den Kühlstrahl besitzt, besteht, und daß diese Austrittsöffnung (10) für den Kühlstrahl in Richtung der Durchführung (3) für den Kühlstrahl zeigt und auf die vom Ski abgewandte Kante der Skistahlkante gerichtet ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4433720A DE4433720A1 (de) | 1994-09-21 | 1994-09-21 | Verfahren und Vorrichtung zum Härten von Skistahlkanten |
| DE4433720 | 1994-09-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0703299A1 EP0703299A1 (de) | 1996-03-27 |
| EP0703299B1 true EP0703299B1 (de) | 1999-05-26 |
Family
ID=6528824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95114322A Expired - Lifetime EP0703299B1 (de) | 1994-09-21 | 1995-09-12 | Verfahren und Vorrichtung zum Härten von Skistahlkanten |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0703299B1 (de) |
| AT (1) | ATE180516T1 (de) |
| DE (2) | DE4433720A1 (de) |
Families Citing this family (1)
| 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)
| 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 |
-
1994
- 1994-09-21 DE DE4433720A patent/DE4433720A1/de not_active Withdrawn
-
1995
- 1995-09-12 DE DE59506013T patent/DE59506013D1/de not_active Expired - Fee Related
- 1995-09-12 EP EP95114322A patent/EP0703299B1/de not_active Expired - Lifetime
- 1995-09-12 AT AT95114322T patent/ATE180516T1/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0703299A1 (de) | 1996-03-27 |
| DE59506013D1 (de) | 1999-07-01 |
| DE4433720A1 (de) | 1996-03-28 |
| ATE180516T1 (de) | 1999-06-15 |
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