EP3765237B1 - Procédé de fabrication de diamantage pour un effet esthétique, à réaliser sur des articles tels que des bijoux en or, en argent et personnalisés, et pour des lunettes et des accessoires d'habillement - Google Patents

Procédé de fabrication de diamantage pour un effet esthétique, à réaliser sur des articles tels que des bijoux en or, en argent et personnalisés, et pour des lunettes et des accessoires d'habillement Download PDF

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Publication number
EP3765237B1
EP3765237B1 EP18826374.3A EP18826374A EP3765237B1 EP 3765237 B1 EP3765237 B1 EP 3765237B1 EP 18826374 A EP18826374 A EP 18826374A EP 3765237 B1 EP3765237 B1 EP 3765237B1
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Prior art keywords
item
diamond dressing
items
manufacturing
sample
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German (de)
English (en)
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EP3765237A1 (fr
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Roberto BEDIN
Andrea CISCATO
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/02—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
    • B24B49/04—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation
    • B24B49/05—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation including the measurement of a first workpiece already machined and of another workpiece being machined and to be matched with the first one
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C17/00—Gems or the like
    • A44C17/001—Faceting gems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • B24B19/03—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for grinding grooves in glass workpieces, e.g. decorative grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/26—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding workpieces with arcuate surfaces, e.g. parts of car bodies, bumpers or magnetic recording heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0069—Other grinding machines or devices with means for feeding the work-pieces to the grinding tool, e.g. turntables, transfer means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/16—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding peculiarly surfaces, e.g. bulged
    • B24B5/162—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding peculiarly surfaces, e.g. bulged controlled by a template
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/16—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of diamonds; of jewels or the like; Diamond grinders' dops; Dop holders or tongs
    • B24B9/165—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of diamonds; of jewels or the like; Diamond grinders' dops; Dop holders or tongs for grinding cavities in gem stones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
    • B28D5/0058—Accessories specially adapted for use with machines for fine working of gems, jewels, crystals, e.g. of semiconductor material
    • B28D5/0064—Devices for the automatic drive or the program control of the machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/16—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of diamonds; of jewels or the like; Diamond grinders' dops; Dop holders or tongs
    • B24B9/167—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of diamonds; of jewels or the like; Diamond grinders' dops; Dop holders or tongs with means for turning and positioning the gem stones

Definitions

  • the present invention relates to a manufacturing method for the diamond dressing process to be performed on items, according to the preamble of claim 1, as for example known from IT VI20 130 168 A1 .
  • This processing method consists in the controlled removal of limited amount of material so as to create micro-concavities, so-called “notches”, to give the processed surface a particular shine, deriving from the different refraction of the light rays that are reflected by the multiplicity of appropriately oriented micro-surfaces obtained on said surface.
  • the virtual configuration of the overall shape of the item or surface to be diamond dressed, when this operation does not comprise the entire item is communicated to an "axis control" unit, which controls a gripper to which the item is hooked, such as to make the gripping points of the item to be processed coincide on the spindle, as well as to regulate the movements of the tool which engraves the surface to be dressed.
  • the Italian patent document 0001424842 is cited, wherein the "virtual" conformation of the entire total extension of the surface to be dressed is detected directly on the item to be processed and to be communicated to the "axis control" unit, said conformation being obtained through a three-dimensional detection on the item itself.
  • Object of the present invention is to improve the method described in the document cited above.
  • object of the present invention is to implement the above-mentioned known method, so as to make possible the realization of the same diamond dressing on all the items of the same series, i.e. those which have an identical shape, said diamond dressing being perfectly equal to that realised on the sample item and being considered by the operator the best possible diamond dressing that can be realized.
  • a further object of the invention is to reduce the diamond dressing time of each item; in any case, considering that in every diamond dressing series hundreds of identical items are processed, the savings of a few seconds on each item processing allows, at the end of the entire operation, a considerable gain in terms of productivity.
  • the orientation of the holes or hold points in the space is detected and the data collected are sent to the CPU, which orients the manipulator gripper that retains the item, such that said item is positioned exactly in the "gripping points" of the spindle, defined with the processing of the first item; therefore, the new item to subject to the manufacturing diamond dressing process will be exactly oriented in the holes or "gripping points" which, therefore, are spatially located in the same way as the gripping points of the "sample item".
  • the diamond dressing machine provided with the program for carrying out the manufacturing diamond dressing process according to the invention, initially envisages the realisation of the first item or "sample item” according to the following steps:
  • the novelty feature of the invention concerns the steps of the manufacturing diamond dressing process of the second item and the items following the first, which present a conformation which is only theoretically equal to the first item but, de facto, have minimal differences following the type of processing used for its realisation (moulding, electroforming, micro-casting or other semi-finished product production methods).
  • the entire manufacturing diamond dressing process envisages at the beginning the withdrawal from a warehouse, where the items P 1 , P 2 , P 3 , P n are inserted on a rod, using a gripper K, of the first item to be dressed P 1 (see fig. 1 ), to be positioned between the heads of the spindle M (see fig. 2 ), to be processed, through the tool S, which detects the spatial coordinates using, as a reference, the "Euler angles" (see fig. 4 ) and finally subjected to diamond dressing through the tool U (see fig. 3 ) to obtain the final diamond dressing PK 1 (see fig. 5 ).
  • the manufacturing diamond dressing process continues with the removal from the warehouse, using the gripper K, of the second item to be dressed P 2 (see fig. 6 ), which is positioned exactly in the "gripping points" T, defined during the diamond dressing of the first item P 1 or “sample item” and then, through a scanner or other detection systems Z, is subjected to the three-dimensional scanning of the surface on which the diamond dressing pattern or "sample pattern" is brought, memorised by the first item or "sample item” (see fig. 7 ), and finally subjected to the diamond dressing using the tool S (see fig. 8 ) to obtain the final diamond dressing PK 2 (see fig.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials For Medical Uses (AREA)
  • Adornments (AREA)

Claims (5)

  1. PROCÉDÉ DE FABRICATION POUR LA RÉALISATION DU TRAITEMENT DE DIAMANTAGE SUR DES OBJETS, qui est obtenu avec la création sur la surface desdits objets (P1) de micro-concavités, dites « entailles », qui créent une brillance spéciale, découlant de la réfraction différente des rayons lumineux qui sont réfléchis par la multiplicité de micro-surfaces adéquatement orientées, façonnées sur ladite surface et du type dans lequel le procédé de fabrication pour le traitement de diamantage prévoit que ledit traitement soit détecté directement sur la surface de l'objet à traiter déjà monté sur la machine, et qu'une conformation « virtuelle » de toute l'étendue de la surface à diamanter soit communiquée à l'unité de « commande des axes » électronique par le biais d'une détection spatiale tridimensionnelle,
    ledit traitement de diamantage de fabrication étant caractérisé en ce que deux fonctions sont mises en œuvre dans le processus décrit ci-dessus :
    - une première fonction dans laquelle le premier objet, après avoir été « traité » par un balayage tridimensionnel et avoir subi le traitement de diamantage de fabrication, est codé comme « échantillon », afin de définir la trajectoire de déplacement du système de préhension (K) ou « préhenseur », qui saisit individuellement le deuxième, et ensuite, toujours individuellement, le troisième objet et les objets suivants, de telle sorte que le scanneur ou d'autres systèmes de vision, une fois que les points de préhension de ce nouvel objet ont été reconnus, transmette(nt) les coordonnées spatiales, détectées à l'aide d'un système de référence développé employant les « angles d'Euler », audit préhenseur qui, ensuite, place ledit nouvel objet au niveau de la broche (M), exactement et toujours dans la même « zone de préhension », en centrant précisément les trous de préhension dudit nouvel objet sur les goupilles de préhension de la broche ;
    - une seconde fonction dans laquelle il est prévu que le premier objet « traité », déjà soumis au traitement de diamantage de fabrication, soit codé comme « échantillon » par un balayage spatial tridimensionnel, tandis que les objets suivants, soumis individuellement au traitement de diamantage de fabrication, subissent successivement, au moyen de scanneurs ou d'autres systèmes de détection, le balayage tridimensionnel de la surface à traiter et sur laquelle le motif de diamantage ou « motif d'échantillon » est appliqué, détecté et mémorisé par le premier objet ou « objet d'échantillon », ledit « motif d'échantillon » est adapté, en modifiant les coordonnées spatiales de traitement à l'aide d'un système de référence élaboré en employant les « angles d'Euler », aux différences toujours présentes, bien que minimes, d'étendue, d'épaisseur, de profondeur, d'orientation et de conformation que présente la nouvelle surface tridimensionnelle destinée à être soumise au procédé de fabrication pour le traitement de diamantage des objets susmentionnés (deuxième, troisième..., nième),
    ledit procédé prévoyant également que le premier objet soit réalisé par le biais des étapes suivantes :
    - 1ère étape : lorsque la machine est mise en marche, l'unité centrale vérifie l'état « axe à zéro » ;
    - 2e étape : l'objet à soumettre au traitement de diamantage de fabrication est installé sur la machine, manuellement ou au moyen d'un chargeur pourvu d'un préhenseur ;
    - 3e étape : un palpeur mécanique, un laser, un scanneur ou un autre dispositif adapté à cet usage, balaye la conformation de la surface de l'objet en cours de traitement et transmet les données à l'unité centrale ;
    - 4e étape : l'unité centrale transmet les données reçues à la mémoire, qui produit l'image virtuelle de l'objet, visible en sortie graphique ;
    - 5e étape : par le biais de l'unité de programme, l'opérateur définit les paramètres de travail de sorte que la machine suive les limites logicielles et mécaniques qui définissent les limites spatiales de la zone à diamanter et les caractéristiques de conformation du profil de diamantage, c'est-à-dire la profondeur et l'orientation des micro-entailles, de sorte que les parois desdites entailles puissent réfléchir la lumière, toutes de manière égale, afin de garantir une réflexion et une brillance uniformes, qui caractérisent l'objet fabriqué final ;
    - 6e étape : l'unité centrale traite les données reçues et transmet les informations d'activité à l'unité programmée pour activer les axes ;
    - 7e étape : par le biais de l'unité centrale, à partir de la position zéro, l'outil (U) atteint l'objet à traiter et est positionné sur une zone précise, déterminée auparavant au moyen du palpeur ;
    - 8e étape : lorsque les axes entre l'outil et l'objet sont mutuellement positionnés à 90°, l'outil commence à graver le matériau jusqu'à ce que le traitement de diamantage de fabrication soit terminé ;
    - 9e étape : le premier objet diamanté est retiré de la machine de manœuvre, ledit traitement de diamantage prévoyant que ledit premier objet réalisé soit considéré comme un « objet d'échantillon » et le procédé de fabrication pour le traitement de diamantage du deuxième objet et des objets suivants de la même série comprend les étapes suivantes :
    - étape I : le chargeur prend un nouvel objet (le deuxième) du dispositif d'alimentation ;
    - étape II : le chargeur amène l'objet à la « zone de contrôle d'objet » où, à l'aide d'un palpeur laser, d'un scanneur 3D ou d'autres systèmes de vision qui peuvent détecter des valeurs (exprimées en valeurs numériques interprétables) ou prendre des images (exprimées en pixels interprétables), le chargeur-préhenseur est orienté de façon à positionner l'objet correctement dans les « points de préhension », définis au cours du procédé de fabrication pour le traitement de diamantage du premier objet ou « objet d'échantillon » ;
    - étape III : un palpeur mécanique, un laser ou un autre type de système explore la conformation de la surface de l'objet en cours de traitement sur 360° ou sur de plus petites portions de ladite surface et transmet les données obtenues à l'unité centrale ;
    - étape IV : l'unité centrale traite les données reçues et effectue une opération de comparaison avec les données correspondantes concernant l'« objet d'échantillon », de sorte qu'elle détecte les différences et les imperfections par rapport aux portions de surface correspondantes de l'« objet d'échantillon » susmentionné ;
    - étape V : l'unité centrale traite les données reçues et, en fonction des différences détectées, applique et adapte le motif de diamantage de l'« objet d'échantillon » mémorisé précédemment à la nouvelle conformation et transmet les nouvelles données d'activité à l'unité programmée pour activer les axes ;
    - étape VI : par le biais de l'unité centrale, à partir de la position zéro, l'outil atteint le nouvel objet à traiter et est positionné sur la zone précise à diamanter ;
    - étape VII : lorsque les axes entre l'outil et l'objet sont mutuellement positionnés à 90°, l'outil commence à graver le matériau jusqu'à ce que le traitement de diamantage de fabrication soit terminé ;
    - étape VIII : le deuxième objet diamanté, présentant le même diamantage que l'« objet d'échantillon », est retiré de la machine de manœuvre.
  2. PROCÉDÉ, selon la revendication 1, caractérisé en ce que, à la suite de la première nouvelle fonction additionnelle, appliquée au deuxième objet individuel, ainsi qu'aux objets individuels suivants, après le couplage par le chargeur à l'aide d'un palpeur, d'un laser ou d'un autre type de dispositif de lecture, l'orientation des trous ou points de maintien dans l'espace est détectée, et les données recueillies sont envoyées à l'unité centrale, qui oriente le manipulateur-préhenseur qui retient l'objet, de telle sorte que ledit objet soit positionné exactement dans les « points de préhension » de la broche, définis avec le traitement du premier objet, de sorte que le nouvel objet à soumettre au traitement de diamantage de fabrication soit orienté exactement dans les mêmes « points de préhension » situés spatialement que les « points de préhension » de l'« objet d'échantillon ».
  3. PROCÉDÉ, selon une ou plusieurs des revendications précédentes, caractérisé en ce que les coordonnées spatiales qui régulent les déplacements du préhenseur, des objets et de l'outil sont définis à l'aide d'un système de référence élaboré en employant les « angles d'Euler ».
  4. PROCÉDÉ, selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il est exécuté sur des objets de toutes formes.
  5. PROCÉDÉ, selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'il est exécuté sur des objets dépourvus de trous de préhension.
EP18826374.3A 2018-03-14 2018-12-21 Procédé de fabrication de diamantage pour un effet esthétique, à réaliser sur des articles tels que des bijoux en or, en argent et personnalisés, et pour des lunettes et des accessoires d'habillement Active EP3765237B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000003564A IT201800003564A1 (it) 2018-03-14 2018-03-14 Procedimento per la lavorazione di diamantatura su oggetti, in particolare aventi forma irregolare
PCT/EP2018/086552 WO2019174780A1 (fr) 2018-03-14 2018-12-21 Procédé de fabrication de diamantage pour un effet esthétique, à réaliser sur des articles tels que des bijoux en or, en argent et personnalisés, et pour des lunettes et des accessoires d'habillement

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EP3765237A1 EP3765237A1 (fr) 2021-01-20
EP3765237B1 true EP3765237B1 (fr) 2021-06-02

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EP (1) EP3765237B1 (fr)
IT (1) IT201800003564A1 (fr)
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IT202100003917A1 (it) * 2021-02-19 2022-08-19 Pa Se S R L “processo di microablazione di profili quali lame di cilindri di taglio o simili, ed apparecchiatura per eseguire tale processo”
IT202300000774A1 (it) * 2023-01-20 2024-07-20 X Oro S R L Macchina diamantatrice per elementi globulari metallici, particolarmente per palline di forma complessa nel campo dell'oreficeria, argenteria o bigiotteria e relativo procedimento di diamantatura
IT202300000813A1 (it) * 2023-01-20 2024-07-20 X Oro S R L Macchina diamantatrice per elementi globulari supportati da una catena, particolarmente per palline di forma complessa inserite nelle corone di rosari, e relativo procedimento di diamantatura

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JP6099960B2 (ja) * 2012-12-18 2017-03-22 ダイトエレクトロン株式会社 ウェーハの面取り加工方法およびウェーハの面取り装置
ITVI20130168A1 (it) * 2013-07-01 2015-01-02 Errea Sistemi S N C Di Bedin Rober To E Ciscato A Procedimento per la lavorazione di diamantatura su oggetti aventi forma irregolare
JP2015022923A (ja) 2013-07-19 2015-02-02 株式会社Ｇｓユアサ 鉛蓄電池の充電方法
JP6404001B2 (ja) * 2014-06-06 2018-10-10 中村留精密工業株式会社 板材の周縁加工装置及び曲面板の周縁加工方法

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WO2019174780A1 (fr) 2019-09-19
IT201800003564A1 (it) 2019-09-14

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