EP3650238A1 - Procédé de marquage des pièces à usiner et pièce à usiner - Google Patents

Procédé de marquage des pièces à usiner et pièce à usiner Download PDF

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Publication number
EP3650238A1
EP3650238A1 EP18205412.2A EP18205412A EP3650238A1 EP 3650238 A1 EP3650238 A1 EP 3650238A1 EP 18205412 A EP18205412 A EP 18205412A EP 3650238 A1 EP3650238 A1 EP 3650238A1
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EP
European Patent Office
Prior art keywords
marking
workpiece
ink
fixing
radiation
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.)
Granted
Application number
EP18205412.2A
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German (de)
English (en)
Other versions
EP3650238B1 (fr
Inventor
Thomas Härtling
Björn Erik Mai
Christoph Zeh
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.)
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
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Priority to ES18205412T priority Critical patent/ES2904878T3/es
Priority to EP18205412.2A priority patent/EP3650238B1/fr
Publication of EP3650238A1 publication Critical patent/EP3650238A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/009—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using thermal means, e.g. infrared radiation, heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0058—Digital printing on surfaces other than ordinary paper on metals and oxidised metal surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0072—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using mechanical wave energy, e.g. ultrasonics; using magnetic or electric fields, e.g. electric discharge, plasma
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams

Definitions

  • a method for marking workpieces is specified.
  • One task to be solved is to specify a method with which a workpiece can be efficiently and permanently connected with a temperature-stable marking.
  • the method is used to apply a marking to a workpiece.
  • the marking it is preferably possible to uniquely identify the workpiece.
  • the marking is, for example, a lettering, a number, an identification, a bar code or a matrix code, for example a data matrix code, for short DMC, or a QR code.
  • the marking is preferably machine-readable.
  • the method comprises the step of providing the at least one workpiece.
  • the workpiece can be a blank.
  • the blank is, for example, a metal sheet and / or a piece of metal to be processed, such as a cast part.
  • the method comprises the step of applying at least one ink for a marking to the workpiece. It is possible that multi-colored markings should be created and that accordingly several different inks can be used. Only exactly one ink is preferably used.
  • the ink is applied only locally.
  • the ink is only applied to the workpiece where the ink is actually required for the marking. Subsequent removal of material colored in relation to the workpiece from the ink can thus be avoided.
  • the method comprises the step of fixing the ink to the marking.
  • the ink is preferably brought briefly to a temperature of at least 400 ° C or at least 500 ° C or at least 600 ° C. Alternatively or additionally, this temperature is at most 1200 ° C or at most 1000 ° C or at most 950 ° C.
  • the components of the ink forming the marking are firmly connected to the workpiece by the action of temperature.
  • the ink can be pre-dried when it is fixed, for example by evaporating a solvent.
  • predrying it is particularly preferred if there is no or no pronounced temperature treatment. This means that predrying can take place at temperatures below 150 ° C. or below 100 ° C., preferably at room temperature, that is to say approximately 25 ° C.
  • the workpiece is heated locally or only locally in an area with the marking during the fixing. Other areas of the workpiece are then not or not significantly affected by the temperature effect when fixing. In particular, non-significant means that the workpiece's mechanical, optical or functional properties do not change in a process-relevant manner. If heating is generally only local, for example for hot forming, then the area of the marking is also preferably heated. This means that there can then be several local temperature entries laterally and / or temporally.
  • a fixing process can be carried out in two steps: First, there is drying, that is, the removal of water and / or organic solvents. This step is typically done at room temperature. This is followed by firing and / or sintering for compaction, for solidification and / or for contrast enhancement and / or long-term fixation of the marking at high temperatures of, for example, at least 250 ° C. or 400 ° C. A substrate material of the workpiece and ink pigments are integrally bonded by this temperature effect.
  • the sintering of the ceramic pigments, in particular, and / or the adhesion promoter which is preferably likewise based on a glass, a ceramic or a glass ceramic, is preferably carried out.
  • fixing is usually carried out in an oven environment that is either only used for this purpose or that primarily serves another purpose and can also fix the marking in parallel. If an oven is used for a main purpose other than to fix the marking, you have to rely on a position of the printer on or near the oven when printing the marking, or the marking must be so firmly connected to the component that it is already unburned the marking is not lost or damaged by handling the workpiece and other work steps. This reduces the flexibility of the possible uses and / or prevents relevant areas of the process chain from being identified using the marking.
  • the, for example, printed area for the marking for sintering pigments and / or the adhesion promoter is locally heated.
  • This local heating takes place, for example, by means of a laser, by means of induction, by means of an electrical resistance, electrodes being attached to the workpiece, or by means of high-energy light pulses.
  • a process can also be used which leads to local heating and primarily serves another purpose, for example local heating for forming the workpiece.
  • the information of the marking which is carried by the inorganic adhesion promoter and the pigments in the form of a pre-structured marking and which is preferably applied by means of inkjet printing, is thus firmly connected to the workpiece or component in the method described here by local heating.
  • the described method and the marking generated with it can be used, for example, in the fields of application of direct part marking of metallic components, sheet metal forming, hot soldering and / or in metal casting.
  • the ink additionally comprises an inorganic binder, which is preferably also contained in the finished marking.
  • the inorganic binder is preferably present in the form of particles in the ink.
  • An average particle diameter of the particles of the binder in the ink is preferably at least 10 nm or at least 0.1 ⁇ m or at least 0.2 ⁇ m and / or at most 0.1 mm or at most 50 ⁇ m or at most 10 ⁇ m.
  • the ink contains ceramic pigments.
  • the ceramic pigments preferably give the coloring and / or a contrast of the marking to the workpiece.
  • the term "ceramic pigments" includes glass ceramics that have amorphous and crystalline sub-areas. It is possible that such a glass ceramic only forms when it is fixed in place, such a glass ceramic then being preferred consists of the binder and the ceramic pigments.
  • the ceramic pigments and / or the finished marking are made from one or more of the following materials: oxides such as BeO, MgO, Al 2 O 3 , SiO 2 , CaO, TiO 2 , Cr 2 O 3 , MnO, Fe 2 O 3 , ZnO, SrO, Y 2 O 3 , BaO, CeO 2 , UO 2 ; Carbides such as Be 2 C, Be 4 C, Al 4 C 3 , SiC, TiC, Cr 3 C 2 , Mn 3 C, Fe 3 C, SrC 2 , YC 2 , ZrC, NbC, Mo 2 C, BaC 2 , CeC 2 , HfC, TaC, WC, UC; Nitrides such as Be 3 N 2 , BN, Mg 3 N 2 , AlN, Si 3 N 4 , Ca 3 N 2 , TiN, VN, CrN, Mn 3 N 2 , Sr 3 N 2 , ZrN, NbN, Mo 3
  • oxidic glasses such as silicate or borate glasses
  • multi-phase materials such as Al 6 Si 2 O 13
  • mixed crystals such as those from the Al 2 O 3 -Cr 2 O 3 , MgSiO 4 , CaSiO 4 , ZrSiO 4 , MgAl 2 O 4 system , CaZrO 3 , SiAlON, AlON and / or B 4 C-TiB 2
  • ceramic pigments with a non-stoichiometric composition.
  • an average particle diameter of the ceramic pigments in the ink and / or in the finished marking is at least 10 nm or at least 50 nm or at least 0.1 ⁇ m and / or at most 30 ⁇ m or at most 5 ⁇ m or at most 500 nm or at most 200 nm.
  • the term “average diameter” preferably refers to a D50 value, that is to say to a median value. It is possible that the average diameter of the ceramic pigments in the ink is larger or smaller than the average diameter of the particles of the binder, for example by at least a factor of 2.
  • the marking has at least in a part of the near ultraviolet, the visible and / or the near-infrared spectral range, both with respect to the workpiece, a difference in reflectance and / or a difference in reflectance and / or an albedo difference of at least 15 percentage points or 25 percentage points or 40 percentage points .
  • This difference is due to, for example, a color of the ceramic pigments and / or a difference in refractive index and / or a material-specific absorption difference and / or difference in emissivity of the ceramic pigments, in particular, to an environment of the pigments.
  • the marking can be clearly distinguished from a surface of the workpiece due to its optical properties, for example by a camera or by the human eye.
  • the marking has a high contrast to a surface of the workpiece, at least under suitable lighting conditions that can be used to read out the marking.
  • the near ultraviolet spectral range is understood to mean in particular the range from 300 nm to 420 nm, the visible spectral range denotes wavelengths from 420 nm to 760 nm and the near infrared spectral range is wavelengths from 760 nm to 1500 nm.
  • Optical filters can be used to read out the marking, for example blocking an excitation wavelength of a phosphor, so that then only the radiation generated by the phosphor due to the excitation is detected.
  • the marking with regard to contrast and / or a difference in brightness meets the current standard ISO / IEC 15415, which is required for directly marked components.
  • the ceramic pigments are made of Al 2 O 3 , TiO 2 and / or ZrO 2 .
  • the binder preferably comprises SiO 2 as the main component.
  • the temperature is at least 400 ° C. for at most 1 min or for applied for a maximum of 0.5 min or for a maximum of 10 s or for a maximum of 1 s.
  • an energy source for reaching the relevant temperature in step C) is active on the ink and / or on the marking for a maximum of the stated time period.
  • the workpiece is a metal sheet, such as an iron sheet or a steel sheet.
  • a thickness of the metal sheet is, for example, at least 0.1 mm or 0.3 mm or 0.5 mm and / or at most 8 mm or 5 mm or 3 mm.
  • the metal sheet can have a constant thickness or can also vary in thickness.
  • the workpiece is subjected to hot forming in a step D), for example pressing or deep drawing, for example of stamped, planar sheets at a forming temperature.
  • the deformation temperature is preferably at least 700 ° C. or at least 800 ° C. or at least 880 ° C.
  • the deformation temperature is at most 1100 ° C or at most 1000 ° C or at most 950 ° C.
  • the deformation temperature is approximately 920 ° C.
  • the marking is preferably fixed at a temperature below the deformation temperature, for example at least 200 ° C. below the deformation temperature.
  • the workpiece has a protective layer against scaling.
  • the anti-scaling layer is designed to prevent oxidation of the metal sheet, in particular in the area of Prevent or slow down deformation temperature in an oxygen-containing atmosphere.
  • the scale protection layer comprises or consists of aluminum, silicon, zinc and / or at least one metal oxide.
  • the anti-scaling layer is a layer made by hot-dip galvanizing or a layer made of an aluminum-silicon alloy.
  • Protective layers made of or with metal oxides such as aluminum oxide can also be used.
  • the scaling protection layer can also be a protective layer with particles on the nanometer scale, for example an x-tec coating from the manufacturer NANO-X GmbH.
  • a thickness of the anti-scaling layer is, for example, at least 100 nm or 250 nm or 1 ⁇ m and / or at most 30 ⁇ m or 10 ⁇ m or 2 ⁇ m.
  • a preferred composition of the anti-scaling layer is: 87% Al, 10% Si and 3% Fe. The preferred thickness of the anti-scaling layer is between 1 ⁇ m and 40 ⁇ m.
  • the marking is generated directly on the anti-scaling layer.
  • the ink can be printed on the anti-scaling layer.
  • the ink is applied directly to the metal sheet.
  • the marking can still be read, in particular machine-readable, even after step D). That means that the hot forming does not destroy the marking. However, it is possible, albeit not preferred that the area with the marking changes its shape during hot forming.
  • fixing in step C) is carried out by means of a radiation flash.
  • Radiation of the radiation flash is absorbed in the ink and / or on a workpiece surface. This applies the temperature for fixing.
  • the flash of radiation can be short and last, for example, for a maximum of 1 s or 0.1 s or 0.01 s.
  • the radiation flash is preferably incoherent radiation, but alternatively coherent radiation, that is to say laser radiation, can also be used.
  • the radiation from the radiation flash is predominantly ultraviolet radiation.
  • a wavelength of maximum intensity of the radiation flash is preferably between 250 nm and 370 nm inclusive.
  • infrared radiation can be used, in particular with a wavelength of maximum intensity between 1 ⁇ m and 2 ⁇ m.
  • a component is added to the ink that specifically absorbs the radiation. This component can also be realized by the ceramic pigments and / or by the inorganic binder.
  • fixing in step C) takes place by means of electrical and / or magnetic fields.
  • the heating takes place inductively, in particular via alternating magnetic fields, which can generate eddy currents locally in the area of the marking.
  • the heating can be carried out without contact.
  • a current can be impressed directly via an electrical contact for heating.
  • the ink in step B) comprises at least one organic binder.
  • the organic binder is, for example, an acrylic-based material.
  • the binder therefore acts as a kind of adhesive for the ceramic pigments and the particles of the inorganic binder until the fixing takes place at high temperatures.
  • the organic binder is preferably no longer present or at least has no function.
  • the ink in step B) comprises at least one solvent, in particular water or an organic solvent such as an alcohol.
  • the ink can be dried by evaporating the solvent. For example, drying such that the ink becomes smudge-proof.
  • the ink can have a dispersant and / or a plasticizer.
  • the ink can also be designed as a paste, for example as in the publication DE 602 18 966 T2 described. The disclosure content of this document with regard to the ink is included by reference.
  • the dried ink preferably consists of the organic binder, the ceramic pigments and the inorganic binder.
  • the finished marking preferably consists of the ceramic pigments and the inorganic binder, whereby these can be fused or sintered to form a ceramic or a glass ceramic.
  • the ink consists of the solvent, the ceramic pigments and the inorganic binder and the dried ink and the fixed marking consist of the ceramic pigments and the inorganic binder. If the ink is free of an organic binder, the marking is less influenced when it is fixed, for example by decomposing the organic binder and / or by outgassing components of the possibly decomposed organic binder, whereby bubbles can form. Inks without organic binders can also be produced more cheaply.
  • a form of the marking is already defined in step B). This means that in step C) no material is removed from the preferably dried ink or from the marking with which an information content of the marking is changed. The marking with regard to its information content is thus complete immediately after step B).
  • the area with the marking which is heated in step C) during fixing has at most three times the size of the marking itself. This means that the marking and the heated area are approximately the same size.
  • the area with the marking makes up at most 2% or at most 10% of the workpiece.
  • the marking is therefore relatively small compared to the entire workpiece.
  • the marking is at least in the area with the marking above Raised metal sheet of the workpiece. This means that the marking can be a relief that rises from the workpiece.
  • the marking is planarized in a step E) after step C), preferably also after step D).
  • This planarization takes place, for example, by painting with a paint.
  • a lacquer can be applied continuously over the marking.
  • the lacquer can be transparent to radiation used to read the marking.
  • the lacquer is at least impervious to visible light. If, for example, the marking is intended to be read out in the infrared spectral range, the lacquer in the relevant spectral range can be permeable.
  • fixing to the marking C) is carried out with a separate heating means.
  • the heat source for applying the elevated temperature is only used for fixing and not for other process steps when machining the workpiece.
  • a tool such as a forming tool, can be used as the heat source for fixing, with which other process steps can also be carried out.
  • the fixing to the marking is preferably carried out simultaneously, that is to say simultaneously, with a further process step.
  • the ink and the marking comprise at least one phosphor.
  • a contrast between the marking and the workpiece can be increased by the at least one phosphor.
  • the ceramic pigments consist of at least one ceramic or glass-ceramic phosphor.
  • the phosphor can be set up to shorten the wavelength of an excitation radiation, also referred to as an upconversion, and convert infrared light into visible light, for example.
  • the phosphor can convert short-wave light into long-wave light. It is possible that the phosphor in particular due to the temperatures during hot forming Luminescence properties is changed. This also enables quality control to be carried out to determine whether hot forming has been carried out with the correct process parameters.
  • the phosphor is a thermoluminescent material, that is to say a material that is luminescent when a threshold temperature is reached.
  • the threshold temperature is preferably at least 125 ° C. or 175 ° C.
  • the phosphor then comprises as doping and / or as part of a crystal lattice or a host lattice preferably one or more of the following elements: Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb.
  • the thermoluminescent phosphor is particularly preferably NaYF 4 : Er, Yb.
  • the use of such phosphors is for example in the publication DE 10 2017 125 006 A1 described. The disclosure content of this document with regard to the use of such phosphors is included by reference.
  • a workpiece is also specified.
  • the workpiece is marked with a method as specified in connection with one or more of the above-mentioned embodiments. Features of the method are therefore also disclosed for the workpiece and vice versa.
  • the workpiece has the marking, the workpiece only showing discoloration and / or a changed material structure in the region of the marking, which is caused by heating to a temperature of at least 400 ° C. in step C).
  • the workpiece is preferably a hot-formed one Metal part or a metal blank, which is intended for hot forming.
  • the minimum temperature for fixing the marking can be determined via the materials from which the marking is composed.
  • the local discoloration and / or changed material structure of the workpiece at the marking can be used to determine the spatial area in which the temperature was applied for fixing to the workpiece, that is to say whether only local heating took place. For example, the local heating manifests itself when the marking is fixed in a tarnish around the marking.
  • FIG. 1 An embodiment of a method for marking workpieces 1 is illustrated.
  • a metal sheet 11 with a workpiece surface 10 is provided.
  • the metal sheet 11 is preferably a steel sheet, for example a stamped but still flat sheet.
  • Figure 2 it is shown that an ink 20 for a marking 2 is printed on the workpiece surface 10.
  • the printing takes place with a printing nozzle 5.
  • the marking 2 can thus be produced in a structured manner by means of ink jet printing.
  • the marking 2 is already essentially generated with its final shape.
  • the marking 2 is, for example, a lettering.
  • the still moist ink 20 can preferably dry to a dried ink 20 'at room temperature.
  • the dried ink 20 ' preferably adheres to the workpiece surface 10 in a smudge-proof manner, but would disappear again if there was greater friction or if solvents were to influence it.
  • the dried tine 20 ' is irradiated with ultraviolet radiation with the aid of an irradiation head 31.
  • the radiation concentrates on a small area 3 around the later, finished marking 2.
  • the dried tine 20 ' is strongly heated, for example to about 600 ° C. This fixes the ink 20 'to the mark 2.
  • the irradiation can be unstructured and coherent across the entire marking 2. This means that the marking 2 is then not scanned with a laser beam.
  • the irradiation takes place, for example, with UV radiation around 360 nm with an energy density of approximately 8 J / cm 2 .
  • the irradiation lasts only around 100 microseconds. Thermal loads on the metal sheet 11 outside the area 3 with the marking 2 can thus be greatly reduced.
  • the radiation used is, in particular, incoherent radiation, for example from a flash lamp.
  • Figure 4 the finished, fixed marking 2 is shown. Due to the irradiation and the associated temperature increase in the area 3, it is possible that a color change 6 occurs around the actual marking 2. However, the color change 6 is limited to a small area around the marking 2.
  • the workpiece 1 is hot stamped.
  • the fixed marking 2 can be applied in areas of the workpiece 1 which are affected by the hot stamping.
  • the marking 2 is located outside of areas in which hot forming takes place.
  • the hot stamping of the marking 2 is not or only slightly impaired in its legibility.
  • the marking 2 is therefore already in an early production stage of the workpiece 1 and attachable and captive to the component regardless of other process steps. This enables efficient and reliable tracking of the workpiece even over long process chains.
  • a coating 4 is applied to the workpiece surface 10 in areas or over the entire surface.
  • the coating 4 is, for example, a lacquer. It is possible that the marking 2 is hidden by the coating 4 from the human eye, but the coating can optionally still be machine-readable.
  • the ink 20 is applied to the workpiece 1.
  • the ink 20 is composed of ceramic pigments 21, particles of an inorganic binder 22, an organic binder 23, a solvent 24 and a dispersing aid 25.
  • the dried ink 20 ' is illustrated, which no longer has a solvent 24.
  • the pigments 21 and the binder 22 as well as the optional dispersing aid 25 are held together via the organic binder 23, so that the dried ink 20 ′ is attached to the workpiece 1 in a smudge-proof manner.
  • sintering and fixing to mark 2 has taken place.
  • the organic binder 23 and the dispersing aid are no longer present or are only present in traces which no longer fulfill a specific function.
  • sintering and / or fixing preferably coherent areas of marker 2 are formed for individual characters. Within a coherent area, the marking 2 preferably shows a homogeneous color impression for a viewer and / or for a camera.
  • the contiguous areas can be formed as smooth elevations over the workpiece.
  • the contiguous areas are preferably formed by a glass ceramic which is produced from the pigments 21 and the binder 22.
  • the ink 20 as in the Figures 7 to 9 described, can also be used in all other exemplary embodiments.
  • FIGS 10 and 11 are alternatives to the step of heating the Figure 2 shown.
  • contact needles 32 are placed on the electrically conductive workpiece 1, wherein more than two contact needles 32 can be used. Via the contact needles 32, electrical currents are generated in the area 3 in the workpiece 1, which lead to a strong local heating of the workpiece 1 and thus the dried ink 20 '. In this way, the fixation to mark 2 can be carried out.
  • eddy currents in particular can be used in the workpiece for fixing without contact via magnetic fields.
  • a heating tip 33 near the ink 20 or the optionally dried ink 20 ' is heated, as a result of which the ink 20 is dried and heated or the already dried ink 20 ′ is heated and fixed to the marking 2.
  • the heating tip 33 is preferably operated only over the dried ink 20 '. The whole is preferred Mark 2 completed in a single heating step with the heating tip 33.
  • Figure 10 illustrates that the mark 2 is formed by a bar code.
  • the marker 2 is a matrix code.
  • Such types of markings 2 can accordingly also be used in all other exemplary embodiments.
  • a separate heating means 31, 32, 33 is used in each case, which is used only for fixing the dried ink 20 ′ or for drying and fixing the ink 20.
  • the fixation to mark 2 according to the Figures 12 to 14 combined with another process step.
  • the workpiece 1 is provided with the only schematically indicated dried ink 20 '.
  • the workpiece 1 is deformed with a shaping tool 34a, 34b. At least the forming tool 34b, which covers the dried ink 20 ', is heated.
  • the resulting, hot-formed workpiece 1 with the finished marking 2 is in Figure 14 shown.
  • the components shown in the figures preferably follow one another directly in the order given. Yourself in the Layers not in contact with figures are preferably spaced apart from one another. If lines are drawn parallel to one another, the corresponding areas are preferably also aligned parallel to one another. Unless otherwise indicated, the relative positions of the drawn components to one another are also correctly represented in the figures.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Thermal Sciences (AREA)
  • Toxicology (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
EP18205412.2A 2018-11-09 2018-11-09 Procédé de marquage des pièces à usiner Active EP3650238B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES18205412T ES2904878T3 (es) 2018-11-09 2018-11-09 Procedimiento de marcado de piezas de trabajo
EP18205412.2A EP3650238B1 (fr) 2018-11-09 2018-11-09 Procédé de marquage des pièces à usiner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18205412.2A EP3650238B1 (fr) 2018-11-09 2018-11-09 Procédé de marquage des pièces à usiner

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EP3650238A1 true EP3650238A1 (fr) 2020-05-13
EP3650238B1 EP3650238B1 (fr) 2022-01-05

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021121983A1 (de) 2021-08-25 2023-03-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Keramikbauteil und Herstellungsverfahren hierfür
DE102022207444A1 (de) * 2022-07-21 2024-02-01 Volkswagen Aktiengesellschaft Verfahren zur Herstellung von Bauteilen aus einem pulverförmigen Werkstoff
DE102023116057B3 (de) 2023-06-20 2024-09-26 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Verfahren zum Auslesen einer Markierung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2617671A1 (de) * 1975-04-25 1976-11-11 Hoogovens Ijmuiden Bv Markierungsmasse fuer heisse metallgegenstaende und verfahren zum auftragen derselben auf heisse metallgegenstaende
DE60218966T2 (de) 2001-12-13 2007-07-12 Osram Sylvania Inc., Danvers Phosphorpastenzusammensetzungen
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EP3109058A2 (fr) 2015-06-26 2016-12-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé de marquage de pièces et pièces marquées
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Publication number Priority date Publication date Assignee Title
DE102021121983A1 (de) 2021-08-25 2023-03-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Keramikbauteil und Herstellungsverfahren hierfür
DE102022207444A1 (de) * 2022-07-21 2024-02-01 Volkswagen Aktiengesellschaft Verfahren zur Herstellung von Bauteilen aus einem pulverförmigen Werkstoff
DE102023116057B3 (de) 2023-06-20 2024-09-26 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Verfahren zum Auslesen einer Markierung

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