EP2836326A1 - Insert de coupe et outil de coupe - Google Patents

Insert de coupe et outil de coupe

Info

Publication number
EP2836326A1
EP2836326A1 EP13718531.0A EP13718531A EP2836326A1 EP 2836326 A1 EP2836326 A1 EP 2836326A1 EP 13718531 A EP13718531 A EP 13718531A EP 2836326 A1 EP2836326 A1 EP 2836326A1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting edge
cutting insert
edge
angle
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Withdrawn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
EP13718531.0A
Other languages
German (de)
English (en)
Inventor
Bruno Teusch
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.)
Guehring KG
Original Assignee
Guehring KG
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 Guehring KG filed Critical Guehring KG
Publication of EP2836326A1 publication Critical patent/EP2836326A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/02—Milling surfaces of revolution
    • B23C3/05—Finishing valves or valve seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/202—Plate-like cutting inserts with special form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/04—Overall shape
    • B23C2200/0416—Irregular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/04—Overall shape
    • B23C2200/0455—Square
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/04—Overall shape
    • B23C2200/0477—Triangular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/12—Side or flank surfaces
    • B23C2200/121—Side or flank surfaces with projections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/28—Angles
    • B23C2200/286—Positive cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2250/00—Compensating adverse effects during milling
    • B23C2250/21—Compensating adverse effects during milling compensating wear of parts not designed to be exchanged as wear parts

Definitions

  • the present invention relates to a cutting insert for a cutting tool for machining workpieces, the cutting tool itself and a rotary driven tool with at least one cutting edge for cutting
  • FIG. 10 shows, for example, a so-called iso-full-face plate 1, which has a symmetrical shape, with a rake face 2 and a support surface 4, which are plane-parallel to each other, wherein the support surface 4 is smaller than the rake face 2 and the side edges 6 employed are. Between the side edges 6 and the
  • Span surface 2 cutting edges 8 are formed.
  • FIG. 12 shows a section of a cross section of a cylinder head 10 in which a valve seat ring 12 is fitted, which has three angles, namely one
  • Cutting plate 1 are corrected relative to the blade carrier, but this requires more complex clamping systems. Furthermore, such clamping and adjustment systems have the
  • the object of the present invention is to provide a cutting insert and a corresponding cutting tool that provide a longer service life without wear-related cutting edge corrections.
  • Claim 9 solved.
  • the subject matter of claim 11 is a general one
  • the cutting insert has a support surface and a plane-parallel opposing rake face on which at least one cutting edge is formed on.
  • the bearing surface and the clamping surface each have the same basic geometric shape, ie they have a triangular shape, a rectangular shape or another polygonal shape, wherein the aspect ratios may be different.
  • the at least one cutting edge is set outwardly at a predetermined angle relative to the corresponding edge of the support surface, while all other outer edges of the rake surface extend parallel to the corresponding edges of the bottom surface.
  • the at least one cutting edge in the plane or at least in the projection plane of the rake face is one
  • Cutting geometry is corrected by a predetermined allowance. This allowance is intended to compensate for part of the expected wear on the cutting edge.
  • Cutting insert compared to a conventional cutting insert on a certain wear buffer and thus achieves the maximum allowable wear limit after a longer period of use.
  • the cutting insert according to the invention can be achieved by the cutting insert according to the invention with a set by a predetermined angle to the outside cutting edge without additional measures a longer service life.
  • the predetermined angle should be within the angular or positional tolerance of the workpiece to be machined. That is, the cutting geometry, in particular the
  • Cutting edge angle can only be corrected so far and provided with an allowance, as permitted by the tolerance field of the workpiece to be machined. Even if the tolerance field of the workpiece to be machined leaves the free space for any
  • the claim 3 is directed to the general principle that the present invention is based.
  • the at least one cutting edge in view of a wear to be expected in the case of repeated repetition of the same machining operation, has to be one
  • predetermined allowance corrected cutting geometry taking into account the permissible manufacturing tolerance of the cutting insert is within the tolerance range of the workpiece to be machined.
  • This pre-determined allowance can be achieved as in the cutting insert according to claim 1 by a corresponding increase in the rake face or correction of the cutting edge angle or otherwise, as long as the wear-related allowance does not cause the machined workpiece no longer meets the required tolerances.
  • Feed direction leading edge of the cutting edge of the cutting insert is provided with a certain allowance, since the axial delivery of the
  • Cutting tool the front or leading section of the cutting edge first comes into contact with the workpiece to be machined and thus always more heavily loaded and exposed to higher wear than a trailing or trailing portion of the cutting edge.
  • the correction allowance should be at most the lower limit of the workpiece to be machined. In the case of one
  • the allowance should be at most the upper limit of the workpiece to be machined. That is, around the cutting edge of the
  • the cutting insert can be provided with a wear buffer
  • the cutting geometry can also be corrected by a predetermined angle depending on the location of the expected wear. For example, the cutting edge not only in the chip surface plane, but also perpendicular to it be corrected as long as the blade undergoes an oversize in a direction opposite to the wear direction.
  • the predetermined angle may be in the range of 0.5 ° to 1, 5 °, preferably in the range of 0.9 ° to 1, 1 °, in particular about 1 °.
  • the permissible tolerance fields generally depend on the nominal diameter, so that the
  • Cutting inserts have certain contact points and / or surfaces, which are relevant for the alignment of the cutting edge. If a conventional
  • Cutting insert in a corresponding insert seat, clamping claw or cassette is arranged as intended, corresponds to the cutting edge angle the intended nominal angle or cone angle.
  • cutting insert according to the invention can by the predetermined angle of
  • Nominal angle deviate. That is, at a nominal angle of 45 °, the cutting edge is inclined by the predetermined angle, e.g. B. 1 °, deviates and thus is only 44 °.
  • the cutting insert according to the invention can be used with conventional fixing devices without special assembly steps,
  • the cutting insert according to the invention can be used in conjunction with a
  • This cutting tool has a carrier body, a detachable on the carrier body
  • the cutting edge of the intended purpose fixed to the carrier body cutting insert deviates from the nominal size of the workpiece to be machined by the predetermined angle.
  • an angle included between the cutting edge and the rotation axis of the cutting tool corresponding to the nominal angle can be reduced by the predetermined angle when the expected wear occurs at a radially inner portion of the cutting edge and increased by the predetermined angle when expected wear occurs at a radially outer portion of the cutting edge.
  • the cutting edge angle with respect to the rotation axis decreases. If, on the other hand, the expected wear occurs at the radially outer region or in the rear axial feed direction, this area can be provided with an oversize, so that the cutting edge angle increases with respect to the rotational axis of the cutting tool.
  • Cutting insert can be chosen so as to the specific wear of the
  • Claim 1 1 is directed to a general rotary-driven tool, which also meets the above-mentioned object.
  • This tool has at least one cutting edge for machining or producing a defined workpiece surface, the cutting edge being corrected by a predetermined allowance in dependence on an expected wear
  • the inventive principle is thus not limited to cutting tools with interchangeable cutting inserts, but can be applied to any rotary-driven tool, if this one
  • a twist drill can also have a cutting geometry corrected by a predetermined allowance in order to be able to withstand the occurring wear over a longer period of time.
  • Fig. 1 is a plan view of a cutting insert according to a first
  • Fig. 2 is a bottom view of the cutting insert according to the first
  • Fig. 3 is a plan view of a cutting insert according to a second
  • FIG. 4 is a bottom view of the cutting insert according to the second embodiment of the invention.
  • Fig. 5 is a clamping claw with a cutting insert according to the first
  • Fig. 6 is a partial view of a valve seat
  • Fig. 7 shows schematically the cutting edge correction principle, starting from a cutting insert according to the prior art
  • Fig. 8 is a perspective view of the cutting insert according to the second embodiment of the invention.
  • FIG. 9 is a perspective view of a cutting insert according to a modified second embodiment of the invention.
  • Fig. 10 is a plan view of a cutting insert of the prior art
  • Fig. 1 1 is a side view of the cutting insert of Fig. 10;
  • Fig. 12 is a partial cross-sectional view of a valve seat
  • FIG. 13 is an enlarged detail view of FIG. 12; FIG.
  • Fig. 15 is a perspective view of the cutting insert according to a third embodiment of the invention.
  • FIG. 16 shows the side view of the embodiment according to FIG. 15;
  • FIG. 17A to 17C are sectional views of the cutting insert according to Figures 15 and 16 at different points of the cutting edge.
  • Fig. 18 is a plan view of a fourth embodiment of the cutting insert ..
  • the Fign. 1 and 2 show a plan view and a bottom view, respectively
  • Cutting insert 20 according to a first embodiment with a rake face 22 and a support surface 24 which are plane-parallel to each other. Both the rake surface 22 and the support surface 24 are triangular and thus have the same
  • the support surface or bottom surface 24 is slightly smaller, so that the side flanks 26 located between the rake surface 22 and the support surface 24 are set to the support surface 24. While the support surface 24 has the shape of an equilateral triangle with three equal angles of 60 °, the shape of the rake surface 22 deviates slightly from it.
  • One of the three edges between the side edges 26 and the rake face 22 is formed as a cutting edge 28. As shown in Figs. 1 and 2, it is the only one which is not parallel to the corresponding edge 30 of the support surface 24, but is set at an angle ⁇ outwards, so that the rake face 22 is a wedge-shaped section, which is dashed in FIG.
  • the Fign. 3 and 4 show a cutting insert 40 according to a second
  • Embodiment with a rake face 42 and a plane parallel to the support surface 44. Between the rake face 42 and the support surface 44 are salaried side edges 46.
  • the rake face 42 and the support surface 44 again have the same basic geometric shape, the support surface 44 is square and the Span surface 42 as in the first embodiment to a wedge-shaped
  • One of the edges between the rake face 42 and side flanks 46 is again formed as a cutting edge 48, which is set out to a corresponding edge 50 on the bottom or support surface 44 by an angle ⁇ outwards, while the other edges of the rake face 42 and the support surface 44 parallel to each other. Due to the changed cutting edge angle a, which is for example increased by 1 °, the corresponding other angle ⁇ is again reduced by the angle ⁇ or 1 °, while the other two angles ⁇ each form a right angle.
  • FIG. 5 shows clamping claw 60, with which the triangular cutting insert or cutting insert 20 of the first embodiment is connected to a not shown
  • Cutting plate carrier of a finishing tool can be clamped.
  • the cone angle ⁇ which forms the uncorrected cutting edge (drawn in dashed lines) with the axis of rotation, is determined by the specific configuration of the respective clamping claw 60. Since the cutting plate 20 according to the invention one by one
  • Cutting edge region is corrected and the remaining part of the cutting plate 20 corresponds to the geometry of a conventional insert 1, the cutting plate 20 according to the invention without any modifications with conventional
  • FIG. 6 shows a valve seat 14 which has already been described in connection with FIGS. 12 and 13, with a marked tolerance field having an upper dimension Es and a lower dimension El between a nominal dimension N and a maximum dimension G O B or minimum dimension G uB .
  • the maximum dimension G 0 B and minimum dimension G uB form a kind of correction corridor within which the cutting edge 28 (see FIG. 7) can be corrected without falling out of the tolerance of the valve seat 14 to be manufactured. Since, as can be seen from FIG. 14, the cutting edge 8 wears, ie migrates in the direction of minimum dimension G uB in FIG. 6, the cutting edge 28 should be corrected in such a way that it makes use of the permissible upper dimension ES before the first use and thus comes close to the maximum G 0 B. Over time, the cutting edge 28 moves due to the wear of the maximum G 0 B in the direction of minimum G U B- But the so corrected cutting insert 20 are used much longer than when it is made to the nominal size of the workpiece to be machined.
  • FIG. 8 shows a perspective view of the cutting insert 40 according to the second embodiment, in which the cutting edge 48 in the plane of the rake face 42 is tilted outwards.
  • the cutting edge 48 ' can be corrected otherwise by changing the cutting edge 28' outwardly and upwardly toward the original rake face, i.e., the cutting edge 48 '. the rake surface 42 'is tilted slightly upwards, so that the shape shown in FIG. 9 is formed.
  • the entire rake face 42 ' instead of the entire rake face 42 ', only an outer edge section in the region of the cutting edge 28' can be correspondingly changed.
  • FIGS. 15 to 18 show further embodiments of a cutting insert in which the correction of the cutting edge profile in the sense of the invention described above is achieved by a special manufacturing method.
  • This method and the design of the cutting insert or of the cutting tool equipped therewith are the subject of an independent invention for which separate protection is claimed.
  • the cutting insert designated by 140 in FIGS. 15 and 16 is formed by a square body with a bottom surface 142 and a clamping surface 132 that is essentially plane-parallel thereto.
  • the cutting edges 148A-148D are formed between the rake surface 132 and the clearance surfaces 146, where the clearance angle is designated WF.
  • the cutting edges enclose the corner angle WE with each other.
  • Cutting edge 148 at selected locations - here on two sides in the region of the cutting edges 148C and 148D - can be corrected in the sense of the invention described above. This is done by sanding an edge chamfer 150, the width B of which preferably changes continuously along the cutting edge 148C or 148D, as shown in Figures 17A to 17C, in which are sectional views of the cutting insert at selected locations I, II, and III along the cutting edge 148C.
  • the chamfer angle WFA remains over the entire length of the cutting edge preferably constant. Due to the relief-ground surface 146, a new course of the cutting edge 148C * and 148D * results due to the inner widening edge bevel 150, such that the corrected cutting edge is not only inclined to the
  • this positional correction of the cutting edge 148C * and 148D * can be used to extend the life of the cutting insert by minimizing the width of the edge bevel where increased edge wear is to be expected.
  • FIG. 2 A plan view of another embodiment of the cutting insert with corresponding cutting edge angle correction (although the angle correction is shown greatly exaggerated) is shown in FIG.
  • the polygonal prismatic cutting insert 240 has triangular shape starting from a dashed geometric figure of an equilateral triangle. With dash-dotted line the bottom surface 242 is indicated. After sanding the floor surface, the
  • Span surface and the side surfaces with the clearance angle are the cutting edges 248 on the dashed lines, which are parallel to the Begrenzug the bottom surface.
  • Angular deviation is used according to the invention to position the cutting edge 248A * so that the position correction of the cutting edge 248A * to 248C * to the
  • the width of the edge bevel 250 is therefore kept lower where increased edge wear is to be expected.
  • Cutting tip 240 was ground with the appropriate clearance angle, the tool, preferably the grinding wheel with which the Kantenfase 250 is to be generated aligned so that the Kantenfase constant chamfer angle WFA (see Figure 17A to 17C) by a linear movement parallel to the bottom surface 242 and can be generated to the original cutting edge 248.
  • WFA Kantenfase constant chamfer angle
  • the insert 240 is rotated by a predetermined angle WD indicated in FIG. 18, whereupon the edge bevel 250 is ground.
  • Edge chamfer over the cutting edge length and the stronger is the angle correction by the value of the angle ⁇ .
  • the size of the predetermined angle of rotation WD required for correcting the cutting edge profile by the required angle ⁇ depends on the chamfer angle WFA and on the clearance angle WF.
  • This design of the cutting insert can also be used to achieve a slight change in angle on the valve seat ring to be machined, without having to rework the insert seat in the tool for this purpose.
  • the cutting insert is removed from the seat and, as described above, equipped with an edging bevel as shown in FIG. 18, after being calculated by a previously calculated one Angle WD has been twisted.
  • the cutting plate eg at a chamfer angle of 20 °, a clearance angle of about 10 ° and a width B of the Kantenfase in the range of o, 2 mm
  • edge chamfer 150 or 250 may of course also be produced in another way, e.g. by moving the milling or grinding tool in the direction of the original cutting edge 148, 248 and, at the same time, by means of an advancing movement on the bottom surface 242, dipping deeper and deeper into the cutting insert.
  • the Kantenfase is not necessarily formed by a flat surface.
  • the cutting insert can also have all other conventional polygonal shapes such as rhomboid and the free surface on the side edge of the cutting edge all commonly used clearance angle such as 3 °, 5 °, 7 °, etc. have.
  • Cutting insert may be provided with or without chip breaker grooves and made of all commonly used cutting materials, e.g. PCD, CBN, VHM, coated (soft and / or hard layer) or uncoated.

Abstract

L'invention concerne un insert de coupe (20) pour un outil de coupe destiné à usiner des pièces par enlèvement de copeaux, l'insert présentant une face d'appui (24) et une face de coupe (22) opposée qui est située dans un plan parallèle à la face d'appui, qui présente la même forme de base géométrique et sur laquelle est formée au moins une arête de coupe (28). Selon l'invention, dans une vue de dessus de la face de coupe (22), ladite arête de coupe (28) est située à un angle prédéfini δ vers l'extérieur par rapport à l'arête correspondante de la face d'appui, tandis que toutes les autres arêtes extérieures de la face de coupe (22) s'étendent parallèlement aux arêtes correspondantes de la face d'appui (24). La vie utile de l'insert de coupe (20) s'en trouve ainsi accrue.
EP13718531.0A 2012-04-13 2013-04-12 Insert de coupe et outil de coupe Withdrawn EP2836326A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012103246A DE102012103246A1 (de) 2012-04-13 2012-04-13 Schneideinsatz und Schneidwerkzeug
PCT/EP2013/057725 WO2013153213A1 (fr) 2012-04-13 2013-04-12 Insert de coupe et outil de coupe

Publications (1)

Publication Number Publication Date
EP2836326A1 true EP2836326A1 (fr) 2015-02-18

Family

ID=48184156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13718531.0A Withdrawn EP2836326A1 (fr) 2012-04-13 2013-04-12 Insert de coupe et outil de coupe

Country Status (3)

Country Link
EP (1) EP2836326A1 (fr)
DE (1) DE102012103246A1 (fr)
WO (1) WO2013153213A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074949A (en) * 1975-09-19 1978-02-21 Robert Zapp, Werkzeug-Und Maschinenfabrik Gmbh Cutting tool
SE502196C2 (sv) * 1990-12-03 1995-09-11 Sandvik Ab Vändskär med positiv spånvinkel, samt fräsverktyg, företrädesvis för hörnfräsning
JPH06218618A (ja) * 1993-01-21 1994-08-09 Mitsubishi Materials Corp スローアウェイチップ
DE4431845A1 (de) 1994-09-07 1996-03-14 Komet Stahlhalter Werkzeug Verfahren und Vorrichtung zur Erfassung und Kompensation von Füge- und Verschleißfehlern beim Feinbohren
CN102046313B (zh) * 2008-06-26 2013-03-20 塞科机床公司 切削刀片套组、铣削刀具和切削刀片
EP2409801B1 (fr) * 2010-07-21 2017-03-01 KARL-HEINZ ARNOLD GmbH Outil de fraisage

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2013153213A1 *

Also Published As

Publication number Publication date
DE102012103246A1 (de) 2013-10-17
WO2013153213A1 (fr) 2013-10-17

Similar Documents

Publication Publication Date Title
EP2484471B1 (fr) Outil d'usinage
EP0677350A1 (fr) Plaquette de coupe, en particulier plaquette de coupe indexable
DE202006016531U1 (de) Schlicht-/Schruppfräser
AT13514U1 (de) Indexierbarer doppelseitiger Frässchneideinsatz
WO2012104066A1 (fr) Outil de perçage et procédé de formation d'alésages
DE3311467C2 (fr)
DE102005050210B4 (de) Schneideinsatz und Fräser
DE2748037A1 (de) Messerkopf zum verzahnen von zahnraedern
WO2006079317A1 (fr) Aiguisage variable d'arete de coupe pour des outils de perçage
EP3071355B1 (fr) Fraise à chanfreiner
EP3414038A1 (fr) Outil d'alésage
DE19963897B4 (de) Verfahren zur drallfreien spanenden Bearbeitung von rotationssymmetrischen Flächen
DE102013014761B4 (de) Stirnfräswerkzeug
EP3791983A1 (fr) Outil de fraisage
DE102013107629A1 (de) Schneideinsatz, Schneidwerkzeug und Verfahren zur Schneidenjustierung
EP3523073A1 (fr) Outil de perçage métallique
EP2836326A1 (fr) Insert de coupe et outil de coupe
DE3909643C2 (de) Mehrschneidenwerkzeugkopf zur spanabhebenden Vor- und Feinbearbeitung mit kreisförmiger Schnittbewegung
EP0912282B1 (fr) Fraisages multiples sur vilebrequins
DE102008049515B4 (de) Verfahren zur spanenden Bearbeitung von Werkstückflächen an Werkstücken, insbesondere an Kurbelwellen, sowie Schneidplatte zur Durchführung eines solchen Verfahrens
DE4413948C2 (de) Werkzeughalter für mindestens einen schräg zur Werkzeughalterachse zustellbaren Schneideinsatz, insbesondere zur Bearbeitung von Ventilbohrungen eines Motorzylinderkopfes
DE102008039135B4 (de) Fräse für eine Kurbelwellen-Fräsvorrichtung und Fräseinsatz und Satz von Fräseinsätzen für einen Fräser für eine Kurbelwellen-Fräseinrichtung
EP3795316A1 (fr) Tête d'outil d'un outil d'usinage et plaquette de coupe amovible correspondante
DE10324432B4 (de) Profilgeschärftes Stabmesser zur Herstellung von Kegel- und Hypoidrädern und Verfahren zum Profilschärfen eines solchen Stabmessers
WO2022167205A1 (fr) Barre de polissage, procédé de fabrication d'une barre de polissage et outil de polissage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20141113

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: GUEHRING KG

17Q First examination report despatched

Effective date: 20170331

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20191101