EP1877222B1 - Machine et procede de gravure en relief et a trois dimensions par jet de materiau abrasif - Google Patents

Machine et procede de gravure en relief et a trois dimensions par jet de materiau abrasif Download PDF

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Publication number
EP1877222B1
EP1877222B1 EP05722370A EP05722370A EP1877222B1 EP 1877222 B1 EP1877222 B1 EP 1877222B1 EP 05722370 A EP05722370 A EP 05722370A EP 05722370 A EP05722370 A EP 05722370A EP 1877222 B1 EP1877222 B1 EP 1877222B1
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EP
European Patent Office
Prior art keywords
nozzles
engraved
abrasive material
machine according
engraving
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Application number
EP05722370A
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German (de)
English (en)
French (fr)
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EP1877222A1 (fr
Inventor
Sami Abid
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary

Definitions

  • the present invention relates to a machine and a numerical control method of embossing and three-dimensional abrasive material jet on an erodible surface.
  • the present invention particularly relates to a machine and a method of fluidized sand jet etching.
  • fluidized sand jet is used to set the sand in motion in a stream of pressurized air.
  • the present invention applies in particular to the etching on a flat surface, which is not limiting because the invention can be applied to etching surfaces of any shape.
  • the present invention applies in particular to three-dimensional etching.
  • This mask can be constituted by the deposition of one or more resistant layers as in the documents US 5,117,366 and DE 43 34 652 or can still be a stencil as in the document US 5,512,005 .
  • the machines and processes used to perform the actual engraving may differ from each other.
  • the document US 5,117,366 reveals an automated sandblasting system and method in which etching is performed by means of a single nozzle.
  • This nozzle can move continuously in a plane parallel to the surface to be etched and can also move along an axis perpendicular to the surface to be engraved in several positions.
  • This type of device mainly makes it possible to produce surface etchings and not three-dimensional engravings because there is no provision for means for managing the engraving depth.
  • the document DE 43 34 652 discloses a method of projection etching a fluidized abrasive material by means of a single nozzle, wherein the diameter of the nozzle, the grain size of the abrasive material having been previously selected according to the type of pattern and the material to be etched, the nozzle supply pressure and its inclination are adapted throughout the process to obtain the desired engraving depth.
  • the nozzle can move in a plane parallel to the surface to be etched and is at a fixed distance from it.
  • the method requires the implementation of a mask for treating areas to be etched to an identical depth, then moving the mask to engrave areas of different depth without affecting areas already engraved.
  • the engraving thus made makes it possible to engrave three-dimensional patterns, but the surface obtained is a series of steps of flat surfaces of different and discontinuous depths.
  • a machine for etching abrasive material onto a surface to be etched comprising a mechanism with two axes of displacement relative to the surface to be etched, characterized in that it comprises at least two nozzles of different diameters carried by the mechanism with two axes of displacement and numerical control means able to control the jet of the abrasive material on the surface to be etched by means of said nozzles and to move in real time said nozzles in a direction substantially parallel to the surface to be engraved with a programmed variable speed.
  • the figure 1 shows the different equipment constituting the engraving machine according to the present invention.
  • Such a machine comprises a microcomputer 1 and a processing and information transmission unit 2 which conveys the information to an electromechanical means 3 adapted to perform the etching.
  • This electromechanical means 3 controls the displacement of a two-axis translation mechanism 400, 410 in relation to a multi nozzle head 5. More specifically, the translation mechanism comprises two vertical axes 400 parallel to each other and a horizontal axis 410 mounted to vertical translation on the axes 400.
  • the multi nozzle head 5 is itself carried by a slider mounted in horizontal translation on the axis 410.
  • the translation mechanism with two axes 400, 410 and allows in real time a displacement of the head multi nozzles 5 during the etching operation and in a plane substantially parallel to the surface to be etched, ie substantially parallel to the plane formed by the X and Y axes, the XYZ mark forming an orthonormal reference.
  • the drive motors of the axes 400, 410 are DC stepper motors 7 receiving signals from the microcomputer 1 via the numerical control. These axes 400, 410 are protected against dust by sealed tubular bellows 420.
  • axes 400, 410 are fixed on a frame type welded support 8 strong enough to ensure the alignment and flatness of the axes.
  • the weight of the multi nozzle head 5 and the device which accompanies it, supported by the axis 410 having a horizontal generatrix parallel to the axis X, including that of the axis 410 is compensated by a counterweight 9 connected to the axis 410 via a wire rope 90 associated with various return pulleys 91, 92, 93, 94.
  • This weight compensation allows effortless operation of the stepper motor 7 used for the vertical displacement of the 410 axis and associated multi nozzle head 5.
  • the cabin 6 is lined inside with an anti-abrasion material, for example rubber. Its sealing is provided by four deployable spring blinds 10 whose band is preferably anti-abrasion polyester. This allows the multi nozzle head 5 and the device that accompanies it to move freely in height, that is to say in a direction parallel to the Y axis, while preventing the exit of the atmosphere loaded with dust.
  • baffles shown schematically under the reference 18, preferably made of special rubber allow the entry and exit of the surface to be engraved which is carried out by the sides of the cabin 6, and this to prevent the projection of sand and dust outside the cabin 6.
  • the machine according to the present invention further comprises two surfaces of the surface to be etched 11 and 12, slightly inclined relative to the vertical so that the surfaces to be etched do not fall, said supports 11 and 12 being arranged respectively at the entrance. and at the exit of the cabin 6 and associated with a conveyor 13 placed at the base of these supports 11 and 12.
  • the conveyor 13 which extends horizontally covers the entire extent of the supports 11, 12 and the interval between them. this.
  • the surface to be etched is loaded on the conveyor belt 13 resting on the support 11. It is moved by the conveyor 13 by means of a motor 14.
  • the operation of this motor 14 is slaved to the microcomputer 1 and the information processing and transmission unit 2 so that it is synchronized with all the etching operations and so that it transports said surface to be engraved to a precise point of the cabin 6, said point of origin.
  • the detection of the arrival of the surface to be engraved at the point of origin automatically stops the advancement of the surface to be etched by means of the brake of the motor 14.
  • a tilting system part of which is schematically represented by the reference 17 and located in or out of the cabin 6 allows the verticalization of the surface to be engraved.
  • the means 17 of the tilting system preferably comprises a jack which biases a cam to actuate said tilting system.
  • the conveyor 13 is activated again to leave the surface to be etched out of the cabin, on the support 12. There is provided a limit switch (not shown) on the conveyor 13 to prevent the etched surface is driven past the conveyor 13.
  • the cabin is thus completely closed during the etching operation, which avoids the prevailing abrasive atmosphere to affect the various components of the machine, and in this case in particular, the supports 11 and 12 .
  • the engraving machine further comprises a hopper 19 disposed at the bottom of the cabin 6 to recover the abrasive material which is in the form of grains and used for etching.
  • a cyclo-filter 20 is connected to the base of the hopper 19 via a pipe 200 and draws the sand and the dust-laden atmosphere recovered in the hopper 19.
  • This cyclo-filter 20 allows the primary separation of abrasive material dust . It is also equipped with a filtration system to prevent dust from escaping into the surrounding area.
  • the large particles are deposited at the bottom of the cyclo-filter 20 and are evacuated via a valve valve 21 which also has the function of maintaining the cyclo-filter 20 in depression. The vacuum is maintained in the cyclo-filter 20 by a blower or equivalent means 202.
  • the abrasive material is sieved by vibration using a screen 23 associated with a vibrator motor 22.
  • the abrasive material thus sieved then has the particle size suitable for being reused and rerouted to a sander 24.
  • sandblaster 24 for its part, it sends the abrasive material with a suitable particle size distribution to the multi nozzle head 5 by means of pipes 25.
  • the figure 2 specifies the interior of the cabin 6 of the machine and more specifically the tilting system 60 for setting vertically the engraving surface fed by the conveyor 13.
  • a position detector 61 permits the automatic stop of the surface to be engraved by means of the actuation of the brake of the motor 14.
  • the tilting system 60 is actuated by means 17, forming an integral part of said tilting system, and which operates the verticalization of the surface to be engraved by means of a support structure 70, which is also an integral part of the tilting system 60.
  • This support structure 70 comprises several bars 72, arranged horizontally along their length and parallel to each other, and serving as a rear support for the surface to be engraved so that it can not fall back.
  • This support structure 70 also comprises an upright 73 and at least one bar 74 arranged vertically and situated in a plane substantially identical to that formed by the upright 73.
  • the bar 74 and the upright 73 hold the surface to be engraved for prevent it from falling forward.
  • the surface to be engraved is perfectly maintained for the engraving operation by means of the bars 72, 74 and the upright 73.
  • the vertical bar 74 carries several springs 62 from one of their ends, the other ends of each of these springs 62 being carried by the various bars 72 thus allowing an adjustment of the verticality of the surface to be etched.
  • the adjustment is made by means of the stiffness of the springs 62 which keeps the surface to be etched in contact with the bars 72 on the one hand, the vertical bar 74 and the upright 73 on the other hand.
  • the figure 3 specifies a preferred embodiment of the blaster 24. Indeed, a number of parameters must be previously set for the etching is perfectly controlled. Among these, the granulometry of the abrasive material is adjusted with the means 20, 21, 22 and 23 described above.
  • abrasive material sent to each nozzle It is also necessary to control the density of the abrasive material sent to each nozzle. This is achieved by controlling the pressure of the air sent, by a suitable dimensioning of a metering device 26 (and in particular of its diameter) of abrasive material to be fluidized, taken out of the blaster 24, and by a suitable dimensioning of the diameter of the flexible pipes 25.
  • the compressed air is actuated by a solenoid valve 27, linked to the numerical control controlled by the means 1 and 2, for fluidizing the abrasive material by giving it the dynamic pressure necessary to accomplish the etching effectively.
  • the sandblaster 24 comprises a multi-channel solenoid valve 28, receiving the abrasive material of the metering device 26 and supplied with air by the solenoid valve 27, allowing the fluidized abrasive material to supply, via a duct 260, the selected nozzle by means of a screw without end 29.
  • This screw 29 is actuated by a stepper motor 30 controlled by the numerical control.
  • the multi-channel solenoid valve 28 consists of a movable slide 31 allowing the choice of the fluidised material inlet by positioning the outlet of the duct 260 in front of one of the ducts 25. Moreover, the exit of each of the ducts 25 is respectively connected to the inlet of one of the nozzles 39.
  • FIGS. 4a and 4b show in plan view and in sectional view, the assembly formed by the multi-channel solenoid valve 28, the screw 29, the motor 30 and the movable slide 31.
  • a pneumatic pinching system 33 is implemented by means of small pieces 34.
  • This nip has the essential advantage of ensuring on the one hand a perfect seal by means of an O-ring 35 between the outlet of the duct 260 and the selected outlet 32 and on the other hand the fixing of the pneumatic service of the fluidized abrasive material.
  • the pneumatic clamping system is controlled by lines 280.
  • a limit detector 36 allows the initialization of the servocontrol of this multi-channel solenoid valve 28 to the numerical control at each start of the machine.
  • the small pieces 34 are deactivated by releasing the pressure in the lines 280 and there is no more pinching.
  • the movable slide 31 is then positioned in front of the new feed 32/25 nozzle.
  • an exhaust of compressed air completely eliminates the grains of abrasive material to prevent friction of the movable slide 31 and therefore premature wear.
  • the pressure in the lines 280 is activated to urge the seal 35 when the slide 31 is in the working position.
  • the figure 5 shows the nozzles 39 and the device that accompanies them.
  • This device comprises, a nozzle holder plate 37 connected to the displacement axis 410 by means of a plate 38 which is rigidly fixed to a slide carried by this axis 410, the multi nozzle head 5 comprising the nozzles 39.
  • the multi head nozzles 5 can be moved on the nozzle plate 37, ie in a substantially horizontal plane, during the preparation of the etching, in order to adjust the position of the nozzles 39.
  • the Figures 6a and 6b show that the multi nozzle head 5, itself carried by the nozzle holder plate 37, supports nozzles 39 of different diameters located in order (increasing or decreasing) of diameter and arranged at fixed distances.
  • the nozzles 39 parallel to each other extending at least generally perpendicular to the surface to be etched, their outputs are located at respective different distances from the surface to be etched.
  • the multi nozzle head 5 comprises two plates 50, 51 which define between them a housing holding the associated nozzle 39 and which clamps it to hold it firmly.
  • One of these plates 51 has a concave shape in V 40 receiving the nozzle 39 and providing the arrangement of the nozzles with fixed distances.
  • the multi nozzle head 5 consists of as many elements 42 as nozzles 39, each comprising two plates 50, 51 (four in number for each of the nozzles in the present case) respectively fixed on the door plate.
  • These elements 42 are held rigorously in parallel position and fixed together during etching, by means of lateral lugs 41 designed for this purpose. The respective position of these elements 42 can however be adjusted, thanks to their sliding shapes, during the preparation of an engraving.
  • the entire device is mobile, and in particular the nozzle holder plate 37 connected to the slider relative to the surface to be etched but that the different nozzles 39 are fixed relative to each other during the etching. During etching and during a movement of the plate 37, all the nozzles 39 therefore move identically.
  • the setting parameters conditioning the operation of the nozzles 39 with respect to the surface to be etched are determined by experience. It is possible to enumerate the main adjustments, namely the angle of inclination of the nozzles 39 with respect to the surface to be etched, but also the development of the path of the nozzles 39 by scanning type parallel and successive horizontal passes. These passes are further from a percentage of the recovery of each nozzle 39 to ensure good resolution.
  • the most important parameters in the context of the present invention are the diameter of each of the nozzles 39 and the removal of these nozzles, before etching, from the surface of the material to be etched, as well as the knowledge of the depth of etching by abrasion as a function of the speed of movement of the nozzles 39 relative to the surface to be etched.
  • the adjustment parameters also depending on the nature of the material that it is desired to engrave.
  • This post-processor also allows the engraving by successive chronological operation of large diameter nozzles to small diameter nozzles depending on the degree of resolution that is desired. Each time, an initialization of the point of origin and action on the multi-channel solenoid valve 28 for the choice of the corresponding nozzle 39 is performed. The operation of the multi-channel solenoid valve 28 is therefore sequenced by the post-processor to obtain the desired accuracy of the three-dimensional pattern. This post-processor also allows the choice of the limits of the etching operation given the thickness of the material to be etched.
  • the post-processor allows the translation of all the digital data of the courses in machine language. This results in a file which is subsequently exported automatically to the machine object of the invention, by means of an interface card which gives the electromechanical controls of abrasive jet erosion.
  • the present invention has the characteristic of allowing the production of true continuous surfaces reproducing the volume model whose engraving is desired to be performed.
  • a three-dimensional numerical model can for example be obtained by the well-known computer-aided design and manufacturing tools, introduced into the microcomputer 1 and which makes it possible to effectively apply this numerical model to the surface to be etched by the through the law of behavior described above.
  • each nozzle 39 has a task comparable to what would have to be accomplished with a conventional diamond or other tool, for machining, with the fundamental innovation present that the parameterization of the erosion depths is a function of the speed nozzle displacement, while the diamond tool penetrates into the material depending on the depth of the machining pass with a fixed speed, as also described in the prior art.
  • the method implemented by the engraving machine according to the present invention is therefore based on a numerical control of a set of constituent elements of the machine.
  • the present invention can be used to engrave any type of surface.
  • the engraved patterns of concave or convex type can be of all kinds: geometric shapes, calligraphy and three-dimensional images.
EP05722370A 2005-03-10 2005-03-10 Machine et procede de gravure en relief et a trois dimensions par jet de materiau abrasif Active EP1877222B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TN2005/000001 WO2006096143A1 (fr) 2005-03-10 2005-03-10 Machine et procede de gravure en relief et a trois dimensions par jet de materiau abrasif

Publications (2)

Publication Number Publication Date
EP1877222A1 EP1877222A1 (fr) 2008-01-16
EP1877222B1 true EP1877222B1 (fr) 2009-02-18

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EP05722370A Active EP1877222B1 (fr) 2005-03-10 2005-03-10 Machine et procede de gravure en relief et a trois dimensions par jet de materiau abrasif

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EP (1) EP1877222B1 (it)
CN (1) CN101175605B (it)
AT (1) ATE422988T1 (it)
DE (1) DE602005012875D1 (it)
WO (1) WO2006096143A1 (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2552211T3 (es) * 2012-06-26 2015-11-26 Hueck Rheinische Gmbh Procedimiento para la producción de una estructura de superficie con un dispositivo de chorro de agua
PL2839970T3 (pl) * 2013-08-21 2018-04-30 Hueck Rheinische Gmbh Sposób wytwarzania hydrofobowej albo superhydrofobowej topografii powierzchniowej
CN106626937B (zh) * 2016-12-29 2019-07-23 重庆节之道竹业有限公司 一种雕塑设备
CN109483409B (zh) * 2018-11-21 2020-10-02 无锡荣恩科技有限公司 航空零部件自动补喷的除漆方法
CN110815054A (zh) * 2019-11-26 2020-02-21 河北建材职业技术学院 喷砂雕刻系统及喷砂雕刻方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5117366A (en) * 1989-06-28 1992-05-26 Stong Jerald W Automated carving system
US5129355A (en) * 1989-07-17 1992-07-14 Crc-Evans Pipeline International, Inc. High pressure water jet cleaner and coating applicator
US5512005A (en) * 1992-08-28 1996-04-30 Michael P. Short Process and apparatus for automatically engraving stone memorial markers
CN2220924Y (zh) * 1995-03-30 1996-02-28 张贻明 硬材通用雕刻机
CN2332534Y (zh) * 1998-05-26 1999-08-11 尹炜 新型喷刻机

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Publication number Publication date
ATE422988T1 (de) 2009-03-15
DE602005012875D1 (it) 2009-04-02
CN101175605B (zh) 2010-06-16
CN101175605A (zh) 2008-05-07
WO2006096143A1 (fr) 2006-09-14
EP1877222A1 (fr) 2008-01-16

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