EP3053756A1 - Dispositif de marquage doté de moteurs linéaires - Google Patents

Dispositif de marquage doté de moteurs linéaires Download PDF

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Publication number
EP3053756A1
EP3053756A1 EP15000315.0A EP15000315A EP3053756A1 EP 3053756 A1 EP3053756 A1 EP 3053756A1 EP 15000315 A EP15000315 A EP 15000315A EP 3053756 A1 EP3053756 A1 EP 3053756A1
Authority
EP
European Patent Office
Prior art keywords
marking
linear motor
workpiece
tool
movement
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Withdrawn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
EP15000315.0A
Other languages
German (de)
English (en)
Inventor
Markus Pape
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.)
INKA-SYSTEMS GMBH & CO. KG
Original Assignee
Inka-Laser & Co KG 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 Inka-Laser & Co KG GmbH filed Critical Inka-Laser & Co KG GmbH
Priority to EP15000315.0A priority Critical patent/EP3053756A1/fr
Priority to EP15003707.5A priority patent/EP3056353A1/fr
Publication of EP3053756A1 publication Critical patent/EP3053756A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H7/00—Marking-out or setting-out work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B3/00—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings
    • B44B3/009—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings using a computer control means
    • 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
    • B44B5/0095—Machines or apparatus for embossing decorations or marks, e.g. embossing coins using computer control means
    • 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
    • B44C1/222—Removing surface-material, e.g. by engraving, by etching using machine-driven mechanical means

Definitions

  • the present invention is in the field of machine tools and relates to a device according to the preamble of claim 1, and a method according to the preamble of the method-related subclaim.
  • a marking tool is computer controlled along along a predetermined range on the product process, with a software control is provided on the marking tool, or is connected to it, which implements the specific for each marking process specifications.
  • a software control is provided on the marking tool, or is connected to it, which implements the specific for each marking process specifications.
  • Different types of material processing of the workpiece are used: scratch embossing and needle embossing.
  • German patent application DE 10 2006 056 388 a device according to the preamble of claim 1 is disclosed, which uses the scratch embossing for marking of motor vehicle bodies.
  • it describes the special requirements given there, for example, that there is a particularly high susceptibility to error for distortion errors or an offset of characters that arise even with a relatively small embossing depth of 0.2 mm.
  • the distortions or unintentional rounding off in the typeface in the outline of letters or numbers arise in State of the art in the scratch embossing due to the large lateral forces required there in the lateral process of the scoring tool "in digging" of Mark istsritzes by slippage, play, twisting and unwanted plasticity of components in the drive system.
  • the drive system in the prior art for marking movements in the x- and y-direction respectively consists essentially of an electric motor, which is designed as a stepping motor, whose driven rotary axis of rotation is transmitted via a gear mechanism and a toothed belt to a spindle drive, which movement in the longitudinal direction allows, and some bearings, housing elements and coupling elements.
  • the objects of the present invention are, firstly, to modify the above-mentioned marking devices in such a way that significant improvements are realized in the typeface that an intensive quality control of the marking as described in the prior art can be avoided and, secondly, in that to modify the marking methods so that the rejects can be reduced by mis-marked parts.
  • the object according to the invention with the features of claim 1 solves the first task.
  • the object according to the invention with the features of the procedural subsidiary claim solves the second-mentioned object.
  • the present invention includes the recognition that it is advantageous to take measures that can reliably produce a fault-free marking that you can save the great apparatus and software-related effort that would otherwise be necessary to avoid all too frequent errors in the Monitor marking, control and correct if necessary.
  • an apparatus for marking a workpiece with a marking tool that is movable by means of a drive system, the drive system including at least one linear motor that causes the movement of the marking tool in a predetermined direction.
  • a drive system with a linear motor replaces a drive system with a conventional electric motor, as in the prior art known exactly in marking devices, the rotational movement must be converted by a spindle drive and a belt drive only in a linear movement, which then for the procedure of the marking tool during the marking process is needed, for example, to mark a straight line portion on the workpiece, as it is when writing an I, T, L, etc. in the creation of the vertical - hereafter called y-direction - extending part of the letter or a number required ,
  • the horizontally extending part of a letter or number can either be as conventional, by a drive system be realized with rotary electric motor or - preferably - also by a drive with a linear motor.
  • the electromotive movement of the linear motor can be transferred directly to the marking tool - ie, in particular with only a few intermediate components, material connections or joints - almost free of play and almost without slippage. In the prior art, this is not the case because of the spindles mentioned or geared or toothed belt drives.
  • the linear motor drive system according to the invention is less susceptible to deformation, in particular less susceptible to twisting, since the force flow from the linear stator via the linear rotor can pass directly to the marking tool via a mounting plate rigidly connected to the rotor.
  • Another advantage of the drive with linear motor is the smaller size that results for the marking. Especially when marking motor vehicle bodies, this is a significant advantage, because the marks are often difficult to access in this important application, due to little free space around the marker.
  • a first drive system with linear motor takes over the movement in a reference direction on the workpiece, for example, the x-direction horizontally on the workpiece in usable final state
  • a second drive system also with a linear motor takes over the independent, second coordinate direction, such as one to the mentioned x-direction perpendicular or nearly perpendicular y-direction.
  • the two drive systems with the two linear motors with each other, and the second linear motor with the tool mechanically so rigid and robust coupled that results in almost play and slip-free marking also in steel, with sources of error in the drive train in comparison to the state of Technology are minimized.
  • Another advantage is the use of two linear motors, which is that the two linear motors can be mechanically coupled in a very simple manner by simply rotated 90 degrees to each other arranged and fastened one above the other. The attachment can be done via a single or two separate intermediate plates, which are already part of the product in some commercially available linear motors anyway.
  • the runners each have the electrical cables connected, it may be advantageous to arrange the runners adjacent.
  • the plates which surround the electrical components such as rotor and stator, which are referred to in the embodiment as a base plate, intermediate plate and Malawiplette, preferably serve as anchoring point for guide elements, such as rails, which then store corresponding guided components such as carriages movably guided. In this way, the runners can be moved very free of play relative to the stators are moved. In the absence of these plates, the guide elements can alternatively be attached directly to the electrical components.
  • the control loop ends in the direction of the marking tip - and thus the direct control of the writing process - during the movement of the motor which is mechanically coupled closest to the marking tip. This means that only the movement of this motor is input into the control loop, but that the actual movement of the marking tip, which is indeed connected via a relative to the inventive solution very loose and with much game pronounced coupling with this engine, no input into the Control circuit finds.
  • the disadvantageous consequences may be, for example, if a toothed belt is loose, or a bearing of a coupling component is defective, and the marking tip consequently makes relatively uncontrolled movements, since the control circuit is "thinking" only to the engine with, and not to the marking tip. Marking errors are therefore not recognized by this loop, and it requires a second control mechanism based on a visual control by a human.
  • the control circuit practically comprises the marking tip itself and its movement, namely due to the fact that the marking tip is directly and immovably connected without mechanical coupling elements with the one linear motor- quasi a single “one-piece” component forms, and this in turn the other linear motor is also directly and immovably connected, and thus mechanically also forms a single "one-piece” component.
  • the control of the marking movement can be done directly via the control loop, which causes the movement of the marking tip.
  • the scratching of this vertical stroke can be repeated, for example, with the same or an increased compressive force, until the desired value is met.
  • the vertical stroke can be extended to its other side where no inhomogeneity is expected. The sign then sits as a whole, for example, in the y-direction 2 mm deeper than in the ideal case, but it still results despite material inhomogeneity excellent writing quality. If, for example, it results from the rule that a character has not been marked well enough, the marking process can be repeated character by character and without the need for a separate visual check. This saves costs and production time.
  • the marking and the scoring is to take place downwards, and the marking can support upwards to penetrate with the required force in the material to be marked - wearing a rigid mounting plate on its underside the marking tool in the form of a marker tip and at the same time on its upper side the magnets of the linear stator for the y-direction.
  • the linear actuator for the y-direction is mounted on the underside of a second mounting plate, which carries on its upper side equal to the linear actuator for the x-direction.
  • the x-directional linear stator is mounted on a third mounting plate for coupling to a robot arm or support arm so that the required marking force in the z-direction can also be applied in the x and y directions during the process.
  • a marking step upstream of the marking step should be performed, which determines whether there are, for example, weld beads or other extremely disturbing effects in the workpiece at the marking point to be used primarily. which in principle stand in the way of a permissible marking.
  • This check can be done manually by swiping with the hand over the marker or also automated by corresponding optical and / or mechanical scanning systems according to the prior art.
  • the marking process according to the invention can now be carried out with the marking device according to the invention, without the need for elaborate control as in the prior art mentioned at the beginning, since according to the invention a very precise marking is effected.
  • manual control and visual inspection is sufficient to check the quality of the marking result.
  • the mark failsafe, forgery-proof as can be written more accurately, and because of the smaller size of the marking a workpiece can be marked at even less accessible places, an advantage that also has a positive effect on the security against counterfeiting.
  • the cost of the marking device are lower than in the prior art, because the marking device according to the invention does not include various components, in particular the aforementioned spindle drives and timing belt with gears.
  • the marking can be done faster, because there are fewer moving parts that need to be accelerated and decelerated. This reduces the cycle times in an automated production on tape. In a hand-held semi-automatic system, the worker is relieved of time. Optionally, the belt speed can be increased.
  • the device according to the invention also permits a character-by-character repetition when viewed from the procedural aspect a marking operation if a character was scratched indistinctly. This saves production time and allows cycle times to be met, even if the marking is on an inhomogeneous surface, which confuses the production in the prior art, for example because a body has to be removed from the strip production in order to continue to process it manually.
  • marking processes can now also be carried out which were not possible in the prior art, at least in many automated production processes:
  • a "failed" marking mark can be made unrecognizable with the same marking tool or, for example, marked as invalid by overwriting with "X" letters, and the marking lettering can be started at a new position or continued with the failed character at a new location.
  • the marking fonts produced according to the invention Due to the geometrical accuracy of the marking fonts produced according to the invention, these can now also be applied to the product several times as control fonts in a much smaller representation. This increases the security against counterfeiting. For example, the marker lettering in only about 3 mm high font in the Be applied near the original lettering on the product to be marked.
  • test digit sequences can also be applied in the vicinity of the original marking or elsewhere, which can be generated or tested according to an algorithm known only to the manufacturer of the product.
  • the security against counterfeiting is further increased.
  • the idea according to the invention even makes it possible, due to the small size of the marking device, to integrate a third drive for the z-direction into the marking device.
  • the drive for the z-direction is, for example, directly where the opposing force for marking is built, that is removed from the marking tool.
  • the z-direction slider is directly connected to the stator of the underlying x- or y-direction mounting plate.
  • the z-direction linear stator is connected to the marking counterforce-generating coupling plate. In order to effect a movement in the z-direction, the coupling between z-rotor and z-stator is inhibited so that the necessary for the scribing in the z direction bearing force of the Markierwerkzeus is present.
  • the marking device according to the invention can be made even smaller size by omitting the lying between the two linear motors mounting plate and they designed so that they after down to the one linear motor out as an engine component, eg acts as a stator, and up to the other linear motor also as an engine component, then acts as a runner.
  • the tool can then be attached without its own coupling plate to the downwardly facing rotor plate, in which fixed the marking tool there with a suitable latching stable. Analog can be moved with the coupling to the supporting element on the upward-facing, outer stator.
  • FIG. 1 and FIG. 3 illustrate that the marking device 10 is provided with a first linear motor 16, which is for the movement in the y-direction and a second linear motor 18, which is set up for the movement in the x-direction.
  • the marking device 10 is adapted to be pushed down from above with a certain downward force in the z-direction, which is large enough around the marking tool 12, a downwardly directed cone with an opening angle of 120 ° with a hardened tip , as is common in the art, in the material to be marked, here in the Embodiment steel, press down in the z direction and cause a trench in the material when driven by said linear motors in the x and y directions or a combination of both directions is moved.
  • a base plate 20 made of hardened aluminum is provided at the upper end portion of the marking device 10, which can absorb the forces exerted by a clamping tool on a punch 21 on the base plate 20.
  • the second linear motor 18 is fixed for the x direction.
  • stator plate 32 of the linear motor 18 is attached directly to the base plate 20 at the bottom thereof.
  • the rotor plate 34 of the linear motor 18 is plane-parallel to the stator 32 at a distance of about 0.5 mm.
  • the two plates are movable parallel to the surface relative to each other, held in guide devices, consisting of each edge of the plates arranged guide rails 36 and guide carriage 38th
  • the rotor plate with the electric coils has at its two longitudinal edges in each case two ball-bearing guide carriages 38, which respectively engage around the guide rails 36 in a form-fitting manner.
  • the slides 38 are arranged close enough to the transverse edges of the rotor plate to prevent the magnetic forces, the rotor plate 34 by a possibly acting in the z-direction tilting moment out of the surface-parallel position to the stator plate 32 bring out.
  • the four guide carriage 38 are firmly bolted to a first intermediate plate 24.
  • the rotor plate 34 is firmly glued to the first intermediate plate 24 and advantageously also bolted to it.
  • the electrical control of the rotor plate 34 via its associated electrical connections, as known in the art.
  • the linear motors have an integrated feedback sensor for the position in order to enable a closed loop with target-actual comparison.
  • a second intermediate plate 25 is fixedly screwed to the first intermediate plate 24 and / or glued.
  • the same structure of components for the linear motor 16 is fixed downwards in the direction marker 12 in principle, as described above for the linear motor 18 for the movement of the marker tip in the x direction, except that the rotor plate 44 in y Direction, that is perpendicular to the x-direction back and forth movable. All components are therefore rotated by 90 ° about the z-axis and rotated by 180 ° either around the x- or around the y-axis.
  • the stator plate 42 of the linear motor 16 is fixedly connected to the tool carrier plate 28. At this plate 28, the marking tool 12 is attached in the form of the marking tip, as known in the art.
  • the electrical connections of the rotor plates 34, 44 for the x and y directions are connected to a control device provided according to the invention, which has a driver logic for the execution of the MarkierspitzenGHz and interface logic for connection of a computer-controlled control software containing the marking device according to the invention can be set up for example by laptop, so that may also be a connection to a complex automation logic, which in turn be part of an optionally robot-based, automated production control can.
  • FIG. 2 shows the sake of completeness and to increase the clarity of the device FIG. 1 and 3 in an exploded view.
  • FIG. 4a shows the device FIG. 3 obliquely from above with an additional clamping device 50 on a strut tower 52 in the engine compartment of a motor vehicle.
  • the clamping device 50 includes a cross-sectionally L-shaped angle strip, which transmits as clamping bracket 51, the forces which is massively made of 4 mm stainless steel. It may advantageously comprise conventional aids such as T-beam-like profile reinforcements or the like which help to deform the L under the action of force, as required in the operation of the marking operation.
  • the vertical leg of the L is attached to the base plate 20 as possible rigidly attached.
  • the horizontally drawn leg of the L is torsionally rigid on the vertical leg on the one hand, and on the other hand shown attached to the strut tower of a car, as particularly out FIG. 4b to become clear.
  • FIG. 4b shows a partial section from the illustration FIG. 4a from the left FIG. 4a looking, with only the bracing mechanism of the chuck 50 on the spring leg 56 is shown, and wherein the jaws 60 are shown in cross-section below the upper inner edge 58 of the Federbeindoms in an exposed view. Drawn drawn are the jaws in the non-strained position.
  • a housing 55 contains a pneumatic drive and four clamping arms at the end portion of which a clamping jaw is arranged in each case.
  • the horizontal leg 54 of the L-shaped tension bow has a circular recess, can pass through the four clamping arms with the jaws 60 down and can enter below the upper inner edge of the spring leg. Shown are reasons of improved clarity, only two of the four jaws 60.
  • the jaws 60 can be moved apart radially by the pneumatic drive, not shown, and so under the inner edge in all 4 directions, each offset by 90 °, brace.
  • the horizontal leg 54 of the tension bracket is firmly clamped between the strut tower and the housing 55 of the pneumatic actuator.
  • the force required for marking in the z-direction be produced by a frictionally introduced compressive force in the amount of 1000 to 2000 N on the marking. Or it can be set in a similar manner at a second location in the vicinity of the area to be marked another clamping bracket.
  • a milling is used instead of scribing.
  • a milling head rotates relatively quickly and shears off small layers of the material.
  • the method according to the invention can also be advantageously used for such milling material processing. In this case, a milling head is used as a tool instead of the marking tip, and the contact force in the z-direction is significantly reduced.
  • the double linear motor drive can also be used to advantage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP15000315.0A 2015-02-04 2015-02-04 Dispositif de marquage doté de moteurs linéaires Withdrawn EP3053756A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15000315.0A EP3053756A1 (fr) 2015-02-04 2015-02-04 Dispositif de marquage doté de moteurs linéaires
EP15003707.5A EP3056353A1 (fr) 2015-02-04 2015-02-04 Procede de marquage au moyen de deux moteurs lineaires et controle de qualite par caractere

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15000315.0A EP3053756A1 (fr) 2015-02-04 2015-02-04 Dispositif de marquage doté de moteurs linéaires

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP15003707.5A Division EP3056353A1 (fr) 2015-02-04 2015-02-04 Procede de marquage au moyen de deux moteurs lineaires et controle de qualite par caractere
EP15003707.5A Division-Into EP3056353A1 (fr) 2015-02-04 2015-02-04 Procede de marquage au moyen de deux moteurs lineaires et controle de qualite par caractere

Publications (1)

Publication Number Publication Date
EP3053756A1 true EP3053756A1 (fr) 2016-08-10

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP15003707.5A Withdrawn EP3056353A1 (fr) 2015-02-04 2015-02-04 Procede de marquage au moyen de deux moteurs lineaires et controle de qualite par caractere
EP15000315.0A Withdrawn EP3053756A1 (fr) 2015-02-04 2015-02-04 Dispositif de marquage doté de moteurs linéaires

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP15003707.5A Withdrawn EP3056353A1 (fr) 2015-02-04 2015-02-04 Procede de marquage au moyen de deux moteurs lineaires et controle de qualite par caractere

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106239469A (zh) * 2016-09-22 2016-12-21 中航试金石检测科技有限公司 标记划线装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4780009A (en) * 1987-04-27 1988-10-25 Combustion Engineering, Inc. Steam generator tube sheet automatic stamping device
US5126648A (en) * 1990-03-22 1992-06-30 Megamation Incorporated High resolution piggyback linear motor design for placement systems and the like
DE9407399U1 (de) * 1994-05-04 1994-09-22 Chern, Der Luh, Chungho City, Taipei Anreißvorrichtung für Bohrmarkierungen auf einem Formenrohling
EP0949047A1 (fr) * 1998-04-10 1999-10-13 Marie-Christine Curreno Dispositif de marquage comportant un mécanisme d'entrainement perfectionné
FR2898535A1 (fr) * 2006-03-16 2007-09-21 Sic Marking Soc Par Actions Si Dispositif de marquage a moteurs mobiles
DE102006056388B3 (de) 2006-11-29 2008-05-21 Audi Ag Vorrichtung zur Markierung eines Werkstückes, Markierungsprüfeinheit für eine solche Vorrichtung sowie Verfahren zur Markierungsprüfung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2608797B1 (fr) * 1986-12-23 1989-04-28 Cauwet Claude Perfectionnements aux procedes de gravure automatique
JPH08230393A (ja) * 1995-02-28 1996-09-10 Ando Electric Co Ltd Ｃａｄ装置つきマーキング装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4780009A (en) * 1987-04-27 1988-10-25 Combustion Engineering, Inc. Steam generator tube sheet automatic stamping device
US4780009B1 (fr) * 1987-04-27 1991-08-13 Combustion Eng
US5126648A (en) * 1990-03-22 1992-06-30 Megamation Incorporated High resolution piggyback linear motor design for placement systems and the like
DE9407399U1 (de) * 1994-05-04 1994-09-22 Chern, Der Luh, Chungho City, Taipei Anreißvorrichtung für Bohrmarkierungen auf einem Formenrohling
EP0949047A1 (fr) * 1998-04-10 1999-10-13 Marie-Christine Curreno Dispositif de marquage comportant un mécanisme d'entrainement perfectionné
FR2898535A1 (fr) * 2006-03-16 2007-09-21 Sic Marking Soc Par Actions Si Dispositif de marquage a moteurs mobiles
DE102006056388B3 (de) 2006-11-29 2008-05-21 Audi Ag Vorrichtung zur Markierung eines Werkstückes, Markierungsprüfeinheit für eine solche Vorrichtung sowie Verfahren zur Markierungsprüfung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106239469A (zh) * 2016-09-22 2016-12-21 中航试金石检测科技有限公司 标记划线装置
CN106239469B (zh) * 2016-09-22 2022-09-20 中航试金石检测科技有限公司 标记划线装置

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