Patents Assigned to Liebherr-Verzahntechnik GmbH
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Patent number: 9266179Abstract: A method for dressing a tool of a gear grinding machine, including a workpiece holder and a tool holder, is provided. The tool holder, arranged on a machining head, is rotatable about a first axis of rotation, and is linearly movable via a first linear axis of movement, wherein a workpiece clamped in the workpiece holder can be machined by a tool clamped in the tool holder. The machine furthermore includes a dressing unit with a dressing tool holder rotatable about a second axis of rotation, wherein a dressing tool accommodated in the dressing tool holder is used for dressing the tool clamped in the tool holder. During the dressing operation the machining head is pivoted about the swivel axis in dependence on a tool profile and is linearly moved with the first linear axis of movement.Type: GrantFiled: May 30, 2012Date of Patent: February 23, 2016Assignee: Liebherr-Verzahntechnik GmbHInventor: Hansjoerg Geiser
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Publication number: 20150246445Abstract: A handling apparatus for handling parts, in particular large-volume workpieces, and having at least two gripper modules which are disposed opposite one another at a horizontal carrier which can be moved relative to one another and which are driven by a motor. The handling apparatus is of modular design and having at least one carrier module forming the horizontal carrier and at least two gripper modules as components which can be assembled in modular form.Type: ApplicationFiled: March 28, 2014Publication date: September 3, 2015Applicant: Liebherr-Verzahntechnik GmbHInventors: Wilhelm Kennerknecht, Thomas Grötzinger
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Patent number: 9002507Abstract: An apparatus for the automated detection and removal of workpieces comprising an object recognition device for detecting the workpieces and a gripper for picking the workpieces; and a gripper for picking the workpieces; and a control for evaluating the data of the object recognition device, for track planning and for controlling the gripper, wherein the object recognition device is arranged at a travel arrangement by which it can be traveled from a position of rest into at least one measuring position and back.Type: GrantFiled: June 27, 2013Date of Patent: April 7, 2015Assignee: Liebherr-Verzahntechnik GmbHInventors: Thomas Mattern, David Haenschke, Bernhard Riedmiller, Alois Mundt
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Patent number: 8931336Abstract: The present disclosure relates to a method of measuring and inspecting a workpiece belonging to a gear pair, wherein the method is carried out on a gear cutting machine producing the workpiece, wherein a mating test piece mounted at the working head, in particular at the cutting head, is moved in the direction of the workpiece clamped in the workpiece mount of the machine table until the gear pair is in engagement and the corresponding working axial spacing is reached, the workpiece is driven via the drive movement of the mating test piece of the gear pair, the rotational position of the workpiece to be measured is recorded and the detected actual position is compared with a reference position and at least one value characterizing the rolling gear deviation of the workpiece is calculated while taking account of the comparison made.Type: GrantFiled: February 21, 2012Date of Patent: January 13, 2015Assignee: Liebherr-Verzahntechnik GmbHInventor: Oliver Winkel
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Patent number: 8931984Abstract: The present invention relates to a processing head for processing machines, preferably tooth milling and tooth grinding machines, comprising a direct drive which is arranged in a processing head bed of a processing machine, wherein the direct drive comprises at least two motors actuatable in synchronism with each other.Type: GrantFiled: December 16, 2008Date of Patent: January 13, 2015Assignee: Liebherr-Verzahntechnik GmbHInventor: Thomas Zeller
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Publication number: 20140256223Abstract: The present invention relates to a method for hard-fine machining of tooth flanks with corrections and/or modifications on a gear-cutting machine, wherein respective toothed wheel pairings which mesh with one another within a transmission or a test device are machined while taking account of the respective mating flanks, and wherein the tooth flanks of the relevant workpieces are provided with periodic waviness corrections or waviness modifications. In accordance with the invention, the rotational error extent is determined by means of rotational distance error measurement of the toothed wheel pairs in a gear measuring device and/or transmission. This measurement result serves as an input value for defining the amplitude, frequency and phase position for the periodic flank waviness corrections on the tooth flanks of the toothed wheel pairings for production in the gear-cutting machine.Type: ApplicationFiled: March 4, 2014Publication date: September 11, 2014Applicant: Liebherr-Verzahntechnik GmbHInventor: Hansjörg Geiser
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Publication number: 20140255118Abstract: A gear cutting machine includes a slide, which can be moved in a first direction, and at least two cutting heads, which are mounted on the slide. The cutting heads are mounted on the slide in such a way that they can be moved, independently of each other, in a second direction, and each of the cutting heads includes a motor spindle for receiving a cutting tool.Type: ApplicationFiled: March 6, 2014Publication date: September 11, 2014Applicant: Liebherr-Verzahntechnik GmbHInventor: Thomas ZELLER
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Patent number: 8789312Abstract: The present invention relates to a loading station comprising a loading region which is accessible from a loading side and from a machine side and comprising two door elements movable along a guide from a machine position in which they release the machine side and close the loading side into a loading position in which they release the loading side and close the machine side, wherein the door elements overlap at least partially in the loading position and/or in the machine position so that, on an opening procedure of the machine side and/or of the loading side, the machine side and/or the loading side only starts to open when the respective other side has closed at least partially.Type: GrantFiled: November 26, 2008Date of Patent: July 29, 2014Assignee: Liebherr-Verzahntechnik GmbHInventor: Roman Landerer
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Publication number: 20140206269Abstract: A tool for generating tooth systems by grinding when the maximum tool diameter is limited by collision contours on the workpiece has a dressable grinding tool that is tightly connected to the tool holder. In one preferred arrangement, the dressable grinding tool is glued on the tool holder.Type: ApplicationFiled: January 23, 2014Publication date: July 24, 2014Applicant: Liebherr-Verzahntechnik GmbHInventors: Thomas BREITH, Manfred ZANKL
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Publication number: 20140106950Abstract: A method for changing a gear cutting tool with a double-sided bearing between a tool magazine and a machining head by way of a tool changer maintains a vertical alignment of the gear cutting tool along the vertical Z-axis. The method includes exchanging the gear cutting tool between the tool changer and the tool magazine or the machining head, moving the tool changer and the gear cutting tool between the machining head and the tool magazine or between the tool magazine and the machining head, and exchanging the gear cutting tool between the tool changer and the other of the tool magazine and the machining head while maintaining a vertical alignment of the tool throughout each exchanging and moving act or operation. A tool changer for carrying out the method mentioned is also described.Type: ApplicationFiled: October 14, 2013Publication date: April 17, 2014Applicant: Liebherr-Verzahntechnik GmbHInventor: Thomas ZELLER
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Publication number: 20140052297Abstract: A device for automated removal of workpieces arranged in a container has a detector device, for the purpose of detecting the workpiece, and a picker, which can be moved via a robot arm having at least six axes, for picking and removing the workpieces from the container. The device also has controller for evaluating the data of the detector device, for path planning, and for controlling the robot arm and the picker. The robot arm has a picker arm element, with at least two further axes of movement, for moving the picker.Type: ApplicationFiled: August 16, 2013Publication date: February 20, 2014Applicant: Liebherr-Verzahntechnik GmbHInventors: Thomas MATTERN, David HAENSCHKE, Bernhard RIEDMILLER, Alois MUNDT
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Publication number: 20140051339Abstract: A tool arrangement for a rotary machining tool, for example a grinding disk, has a spindle rotatably accommodated in a housing via a bearing set, onto which spindle a tool holder including a tool mandrel can be clamped for fixing the tool. The tool holder with the tool can be clamped onto the spindle such that the at least one front bearing of the bearing set as well as the set center of the bearing set are enclosed by the tool mandrel and/or the tool.Type: ApplicationFiled: August 16, 2013Publication date: February 20, 2014Applicant: Liebherr-Verzahntechnik GmbHInventor: Matthias PLESSING
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Patent number: 8527085Abstract: The present invention relates to a method for operating a gear grinding machine, with the following operating phases of the gear grinding machine: machining a workpiece on the gear grinding machine by means of a grinding disk and/or grinding worm and dressing a profiling tool for profiling a grinding disk and/or grinding worm on the gear grinding machine.Type: GrantFiled: February 20, 2009Date of Patent: September 3, 2013Assignee: Liebherr Verzahntechnik GmbHInventors: Thomas Breith, Manfred Zankl
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Publication number: 20130202377Abstract: The present disclosure relates to a method for operating a machine tool, in particular a gear cutting machine, with at least two machine tables, with at least one common counter-support and with at least two counter-bracket arms, wherein the clamping forces are controlled and/or regulated at the respective position in dependence on the current process and in dependence on the process forces necessary according to the current process. Furthermore, the present disclosure relates to a machine tool, in particular a gear cutting machine.Type: ApplicationFiled: January 31, 2013Publication date: August 8, 2013Applicant: LIEBHERR-VERZAHNTECHNIK GMBHInventor: LIEBHERR-VERZAHNTECHNIK GMBH
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Publication number: 20130121779Abstract: The present disclosure relates to a method for machining tooth edges of a toothed workpiece, in which a tool clamped on a tool spindle is used for machining a tooth edge of the workpiece, wherein the machining of the tooth edge is effected by a rolling movement of the tool and the workpiece, wherein advancing the tool to the tooth edge is effected via the movement of a carrier arm on which the tool spindle is arranged and which has at least two axes of rotation.Type: ApplicationFiled: November 1, 2012Publication date: May 16, 2013Applicant: LIEBHERR-VERZAHNTECHNIK GMBHInventor: Liebherr-Verzahntechnik GmbH
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Publication number: 20130101367Abstract: The present disclosure relates to a gear cutting machine for gear cutting a workpiece, in particular a toothed wheel, by form milling having at least one cutter head for mounting at least one end mill, wherein the cutter head or the end mill and/or the workpiece mount are adjustable and the end mill axis can be aligned approximately parallel to the machined tooth flank of the clamped workpiece, and wherein the cutter axis can be applied to the flank contour and the end mill has an outer contour corresponding to the flank contour.Type: ApplicationFiled: April 17, 2012Publication date: April 25, 2013Applicant: LIEBHERR-VERZAHNTECHNIK GMBHInventor: Alois Mundt
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Publication number: 20130072095Abstract: The present disclosure relates to an internal gear grinding machine with a grinding arm, on which a grinding spindle is arranged, and with an adjustable coolant nozzle, wherein the coolant nozzle is adjustable via a drive.Type: ApplicationFiled: September 12, 2012Publication date: March 21, 2013Applicant: LIEBHERR-VERZAHNTECHNIK GMBHInventor: Christian Hoerner
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Publication number: 20130072096Abstract: The present disclosure relates to an internal gear grinding machine having a grinding arm at which a grinding spindle is arranged and having a measuring head, wherein the measuring head advantageously includes a measuring sensor. Furthermore, in accordance with the present disclosure, the measuring head is movable from a grinding position into a measuring position via a linear guide.Type: ApplicationFiled: September 13, 2012Publication date: March 21, 2013Applicant: LIEBHERR-VERZAHNTECHNIK GMBHInventor: Christian Hoerner
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Patent number: 8376117Abstract: The present invention relates to a machining center having an associated pallet store and pallet handling system, wherein the machining system is separated from the pallet store by means of a travel path on which the pallet handling device can be moved for the transfer of the pallets, with the travel route being able to be bridged via a part serving as a platform to enable access to the machining center.Type: GrantFiled: December 21, 2007Date of Patent: February 19, 2013Assignee: Liebherr-Verzahntechnik GmbHInventors: Klaus Finkenwirth, Klaus Lingenhöl
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Patent number: 8366513Abstract: This invention relates to an apparatus for the prototype and small-batch production of gear wheels with a dressing disk. In accordance with the invention, the dressing disk has an asymmetric flank shape and a defined head radius. Furthermore, this invention relates to a method for the prototype and small-batch production of gear wheels by using such dressing disk.Type: GrantFiled: February 20, 2009Date of Patent: February 5, 2013Assignee: Liebherr-Verzahntechnik GmbHInventors: Willi Demmler, Manfred Zankl