EP2888074A1 - Procédé d'obtention d'effets brillants sur des outils de presse - Google Patents

Procédé d'obtention d'effets brillants sur des outils de presse

Info

Publication number
EP2888074A1
EP2888074A1 EP13750896.6A EP13750896A EP2888074A1 EP 2888074 A1 EP2888074 A1 EP 2888074A1 EP 13750896 A EP13750896 A EP 13750896A EP 2888074 A1 EP2888074 A1 EP 2888074A1
Authority
EP
European Patent Office
Prior art keywords
depth
remelting
gloss
pressing
pressing tool
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Withdrawn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
EP13750896.6A
Other languages
German (de)
English (en)
Inventor
Ralf Niggemann
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.)
Berndorf Band GmbH
Original Assignee
Sandvik Materials Technology Deutschland 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 Sandvik Materials Technology Deutschland GmbH filed Critical Sandvik Materials Technology Deutschland GmbH
Publication of EP2888074A1 publication Critical patent/EP2888074A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00—Electron-beam welding or cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
    • B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B23K26/354—Working by laser beam, e.g. welding, cutting or boring for surface treatment by melting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/361—Removing material for deburring or mechanical trimming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/062—Press plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/02—Dies; Accessories
    • B44B5/026—Dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B44C1/228—Removing surface-material, e.g. by engraving, by etching by laser radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/20—Tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys

Definitions

  • the invention relates to a method for adjusting the gloss level of a structured surface of a pressing tool, in particular a press plate or press belt.
  • Surface-structured large-size press belts also referred to as endless press belts
  • press plates are used to provide substrates such as in particular plate or strip material for decorative or technical purposes with a surface structure.
  • Surface-structured plate or strip material is used for example in the furniture, flooring, construction and commercial vehicle industry. The material is made, for example, of various plastics. Also used are chipboard, plywood and MDF boards, which are coated with melamine-resin-impregnated films / papers / decors on their useful side (top side) or bottom side. In the production of floors or commercial vehicle floors as well as building panels, the melamine film / paper on the effective surface additionally a defined proportion of corundum added to give the plate useful surface the required abrasion resistance.
  • the surfaces of the panels are provided with decorative structures, such as wood, stone or other structures (for example, pearly or finely striped surface structures, etc.).
  • decorative structures such as wood, stone or other structures (for example, pearly or finely striped surface structures, etc.).
  • Plates for the construction and commercial vehicle industry for example, get technical-geometric structures, such as diamonds, wells or corrugations, for example, to effect skid resistance.
  • the production of the abovementioned pressing tools which are usually made of a steel material, is usually carried out by applying a structured, etch-resistant mask to the surface of the pressing tool to be structured and subsequent etching of the masked surface.
  • the etch-resistant mask is usually printed on the surface. After etching, the mask is removed mechanically or electrolytically and the surface is cleaned. This process is repeated with various structured masks until the desired one End structure is reached. The structure thus arises by creating a height profile on the surface in the form of the mask (s).
  • Another possibility of producing a structure on the surface is to reshape the surface in parts or completely, for example, by sandblasting with a correspondingly hard blasting material, so that surface effects are produced, which can then be transferred from the pressing tool to the stamping.
  • the structured surface of the tool is then chrome-plated. This increases its service life, sets a defined degree of gloss of the plate surface to be produced and makes it easier to demould the plate (detachment of the pressing tool from the stamping) after embossing.
  • the structure of the surface of the pressing tool then corresponds to the negative of the surface structure to be produced on the plate material. The printing and etching of the pressing tools takes place over the entire surface.
  • the production of the respective smooth pressing tools before the surface structuring is carried out by appropriate grinding and polishing operations.
  • the surfaces of the press belts or press plates are each fully machined on the entire surface, so that a homogeneous and very uniform surface and polishes creates a surface gloss.
  • the partial polishing of structured surfaces of the pressing tools serves to produce additional gloss effects.
  • the surface statement of the coinage can be sustainably improved with respect to its overall visual effect (eg improved nature-identical depiction of a wood décor, shimmering surfaces, or the like).
  • a gloss effect can be generated, for example, by a very small grinding of an already finished chrome-plated surface.
  • the thickness of the applied chromium layer must be dimensioned in such a way that it is possible to sand the surface with the finest possible abrasive medium (eg grinding belt K1000) without breaking the chrome layer during the grinding process.
  • the highest elevations of a structure can be smoothed so finely that a strong gloss effect arises.
  • Gloss effects can also be generated by an electrolytic process.
  • a structure is printed on the press belt or press plate to be polished. Subsequently, the surface is polished in an electrolytic process.
  • the ink used protects structural areas from electrolytic attack, so that only the non-printed areas are polished. After removing the printed structure, the now exposed areas appear with the original gloss, which is usually much duller.
  • the surface of the pressing tool is understood here and below to mean the surface of the pressing tool which is effective when embossing a stamping.
  • energy radiation is primarily laser radiation into consideration. However, it is also possible to use other energy radiation, for example electron radiation, with which sufficient energy can be coupled into the surface in such a way that it reaches a depth of 1 to 5 ⁇ m (preferably to a depth of 1 to 3 ⁇ m). is remelted.
  • energy radiation is primarily laser radiation into consideration. However, it is also possible to use other energy radiation, for example electron radiation, with which sufficient energy can be coupled into the surface in such a way that it reaches a depth of 1 to 5 ⁇ m (preferably to a depth of 1 to 3 ⁇ m). is remelted.
  • the energetic radiation is expediently guided line by line or meandering over individual sections of the pressing tool surface or over the entire surface of the pressing tool.
  • the adjacent lines may overlap.
  • the line width corresponds to the width of the radiation and may be, for example, in a range of 50 to 500 ⁇ m.
  • the gloss level can be varied steplessly, so that certain sections receive a higher degree of gloss than others. As a result, further optical effects can be generated on the pressing tool and thus on the stamping produced therewith.
  • the process according to the invention can be carried out in one operation, without the need for additional work steps or additional surface coatings.
  • Previous steps for treating the surface with an energetic jet, with which the surface is remelted much deeper, as described for example in DE 103 42 750.3 and relates to a similar surface treatment for polishing and patterning of tool surfaces, are also not necessary. This has to do in particular with the fact that the surface of the pressing tool for producing its surface structure has already undergone a surface treatment, for example has been etched. If the treatment of the pressing tool surface is to be repeated one or more times, it makes sense to rotate the machining direction by 90 ° in order to improve the smoothing result.
  • the surface processed according to the invention can nevertheless be subsequently coated, for example to give it a special mechanical or chemical resistance.
  • the gloss level changes introduced via the surface treatment according to the invention are thereby not substantially changed.
  • the surface treated according to the invention preferably with a chromium coating, for example, be provided with a thickness in a range of 6 to 12 ⁇ .
  • the inventive method is particularly well suited for pressing tools with a surface made of steel, and for the remelting in particular a pulsed energy radiation is used. But it can also be used a continuous radiation.
  • the remelting time is preferably 1 to 10 s / cm 2 .
  • a radiation source is in particular an ND: YAG laser or an excimer laser into consideration.
  • the power of the energetic radiation is preferably in a range of 50 to 250 W.
  • the focus of the radiation source is preferably in a range of 150 - 400 ⁇ .
  • the remelting takes place as a function of the structure depth of the macrostructure of the surface, wherein a sensor is provided which precedes the energetic beam and with which the texture depth is determined at a location of the surface and the energy beam as a function of the structure depth determined is switched on and off.
  • a sensor is provided which precedes the energetic beam and with which the texture depth is determined at a location of the surface and the energy beam as a function of the structure depth determined is switched on and off.
  • structural levels or structural areas whose gloss level is to be improved can be specified via a software control.
  • the macrostructure of the surface may have a depth of about 100 .mu.m, and it is determined that the structure is remelted in those areas where the surface is 30 to 70 .mu.m higher than the structural bottom, ie the lowest level of the structure of 100 pm.
  • surface sections of the surface can be specified in which a surface treatment is basically not to take place, or in which they should generally take place over the entire surface, or even depending on the height profile of the (macro) structure of the surface.
  • the Radiation is turned on when the measuring sensor has determined that the height of the structural profile is within the range set for processing, and / or when the radiation source is in a surface portion where surface treatment is to take place. If at least one of these two conditions does not apply, the radiation source is switched off or remains switched off.
  • the degree of gloss to be achieved with the treatment can be predetermined to this effect depending on the respective position of the radiation source.
  • FIGS. 1 to 3 show examples of sections of press plates produced by the method according to the invention.
  • Figure 1 shows a press plate surface, whose lower half in the figure was treated by the method according to the invention. It can be seen that the entire lower half of the sheet has been surface-treated, wherein the surface structure has a different degree of gloss in previously defined strip sections in the areas, which have a certain minimum height relative to the structural ground in relation to the adjacent areas of the structure.
  • Figure 2 shows a press plate surface, whose lower section in the figure in the figure so surface-treated that about 50% of the total surface has a higher gloss level.
  • all parts of the structured surface which lie in a range between 25% to 75% of the total height of the surface structure were surface-treated according to the invention.
  • the surface structure in the structural ground and in its upper regions is a lower degree of gloss.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Laminated Bodies (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Laser Beam Processing (AREA)

Abstract

L'invention concerne un procédé d'adaptation du degré de brillant d'une surface structurée d'un outil de presse, en particulier d'une tôle ou d'une bande d'emboutissage, dans lequel un rayonnement énergétique, en particulier un rayonnement laser, est utilisé pour faire fondre au moins une partie de la surface jusqu'à une profondeur de 1 à 5 μm, de préférence jusqu'à une profondeur de 1 à 3 μm. Par comparaison avec un procédé de polissage classique pour des plaques de presse, ceci donne un procédé considérablement plus rapide et plus économique, qui permet en outre de modifier le degré de brillant de la surface de l'outil indépendamment de sa structure superficielle.
EP13750896.6A 2012-08-24 2013-08-23 Procédé d'obtention d'effets brillants sur des outils de presse Withdrawn EP2888074A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012107827.0A DE102012107827A1 (de) 2012-08-24 2012-08-24 Verfahren zur Erzeugung von Glanzeffekten auf Presswerkzeugen
PCT/EP2013/067540 WO2014029868A1 (fr) 2012-08-24 2013-08-23 Procédé d'obtention d'effets brillants sur des outils de presse

Publications (1)

Publication Number Publication Date
EP2888074A1 true EP2888074A1 (fr) 2015-07-01

Family

ID=49003788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13750896.6A Withdrawn EP2888074A1 (fr) 2012-08-24 2013-08-23 Procédé d'obtention d'effets brillants sur des outils de presse

Country Status (6)

Country Link
US (1) US20150183056A1 (fr)
EP (1) EP2888074A1 (fr)
CN (1) CN104736290A (fr)
DE (1) DE102012107827A1 (fr)
RU (1) RU2015110321A (fr)
WO (1) WO2014029868A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20153556A1 (it) 2015-09-11 2017-03-11 Flai Srl Procedimento migliorato per la realizzazione di stampi metallici, quali lamiere, cilindri e similari provvisti di almeno una superficie strutturata e stampi metallici ottenuti con questo procedimento
DE102017006358A1 (de) 2017-07-06 2019-01-10 Forschungszentrum Jülich GmbH Verfahren zur Strukturierung einer Substratoberfläche
DE102019121861A1 (de) * 2019-08-14 2021-02-18 Hueck Rheinische Gmbh Verfahren und Vorrichtung zum Herstellen eines Presswerkzeugs
DE102019124004A1 (de) * 2019-09-06 2021-03-11 Hueck Rheinische Gmbh Presswerkzeug, Werkstück, Verfahren zum Herstellen eines Presswerkzeugs und Verfahren zum Herstellen eines Werkstücks

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DE4241527A1 (de) * 1992-12-10 1994-06-16 Opel Adam Ag Verfahren zum Aufhärten und ggf. Glätten von Maschinenbauteilen sowie nach diesem Verfahren hergestellten Maschinenbauteilen
DE29505985U1 (de) * 1995-04-06 1995-07-20 Bestenlehrer, Alexander, 91074 Herzogenaurach Vorrichtung zum Bearbeiten, insbesondere zum Polieren und Strukturieren von beliebigen 3D-Formflächen mittels eines Laserstrahls
US6492615B1 (en) * 2000-10-12 2002-12-10 Scimed Life Systems, Inc. Laser polishing of medical devices
DE10228743B4 (de) * 2002-06-27 2005-05-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum Glätten und Polieren von Oberflächen durch Bearbeitung mit Laserstrahlung
CN1451537A (zh) * 2003-04-28 2003-10-29 湖南百富瑞材料有限责任公司 一种陶瓷网纹辊的生产和修复方法
DE10342750B4 (de) 2003-09-16 2008-06-19 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum Glätten und Polieren oder zum Strukturieren von Oberflächen mit Laserstrahlung
DE102005026968B4 (de) * 2005-06-10 2007-06-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum dauerhaften Aufbringen eines Graustufen-Bildes auf eine matte Oberfläche
DE102007055053A1 (de) * 2007-11-16 2009-05-20 Hueck Engraving Gmbh & Co. Kg Verfahren zur Bearbeitung einer strukturierten Oberfläche
DE102007055530A1 (de) * 2007-11-21 2009-05-28 Carl Zeiss Ag Laserstrahlbearbeitung
CN101532134B (zh) * 2009-04-24 2010-11-17 太原理工大学 一种镁铝合金表面的激光重熔增强方法
EP2289708B1 (fr) * 2009-08-26 2011-12-28 Indaffil Holding AG Procédé de fabrication d'une structure de surface d'une tôle de presse métallique, d'une bande sans fin ou d'un rouleau de gaufrage
DE102009051311A1 (de) * 2009-10-29 2011-05-12 Okt Germany Gmbh Verfahren zur Herstellung eines Pressblechs, Verfahren zur Herstellung einer Pressblechanordnung sowie Pressblechanordnung

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None *
See also references of WO2014029868A1 *

Also Published As

Publication number Publication date
US20150183056A1 (en) 2015-07-02
WO2014029868A1 (fr) 2014-02-27
RU2015110321A (ru) 2016-10-10
CN104736290A (zh) 2015-06-24
DE102012107827A1 (de) 2014-02-27

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