Patents Assigned to Heller Maschinenfabrik GmbH
  • Patent number: 11198200
    Abstract: The machine spindle arrangement (22) according to the invention forms a unit with a motor (19) as central element. At one side of the motor (19) a spindle neck (35) with a spindle (32) is flanged that is directly driven by the rotor (28) of the motor (19). The spindle (32) is a so-called null spindle that can be replaced without readjustment with all bearings and other wear parts due to the present exactly adjusted positioning surface (39) that abuts against an axially properly defined bearing contact surface (38). At the backside of the motor (19) facing away from the spindle (32), a tool releasing device (20) and an angle adjustment transmission (21) is arranged that serves to rotate a present traverse feed shaft (42) relative to the spindle (32). The traverse feed shaft (42) serves to actuate an adjustment device at the tool (15).
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: December 14, 2021
    Assignee: GEBR. HELLER MASCHINENFABRIK GMBH
    Inventor: Thomas Dorn
  • Patent number: 11192214
    Abstract: The machine tool (10) has an asymmetrically constructed workpiece positioning device (16) which runs on three guide rails (17, 18, 19). It comprises two carriages (20, 45) which are connected together by a workpiece carrier (31) that is mounted so as to be rotatable about the A axis. While the first carriage (20) serves for the longitudinal and rotary positioning of the workpiece carrier (31), the second carriage (45) is provided merely for supplementary weight support. This results in a mechanically slimline, low-weight structure with high positioning accuracy. High dynamic loadability and thus a high machining rate and particularly high vibration resistance is allowed.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: December 7, 2021
    Assignee: GEBR. HELLER MASCHINENFABRIK GMBH
    Inventor: Gerhard Bauer
  • Patent number: 11135691
    Abstract: The inventive working spindle comprises a spindle housing and a spindle shaft with axial positioning surface and axial contact surface by which the correct axial position of each fitting provided spindle shaft in the spindle housing is obtained. For torque-proof holding of the spindle shaft in the spindle housing, preferably with stationary motor, a braking unit is provided that comprises a radial outer part that is coupled with the spindle housing in a torque-proof manner and a radial inner part that is coupled with the spindle shaft in a torque-proof manner. The largest outer diameter of the peripheral surface of the inner part is smaller than the narrowest location of the through-opening of the spindle housing between the braking unit and the tool side end of the spindle housing. For this reason the spindle shaft can be readily removed from the spindle housing without disassembly measures of the braking unit, if required, and can be reinserted in reverse route.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: October 5, 2021
    Assignee: GEBR. HELLER MASCHINENFABRIK GMBH
    Inventors: Thomas Dorn, Jürgen Walz
  • Patent number: 11059136
    Abstract: A workpiece holder device for a machine tool has a holder, which has a support part and a holder part. The support part supports the holder on a support device, preferably so that the holder can rotate about an axis of rotation. The holder part is set up to hold a workpiece directly or indirectly. To avoid, or at least minimize deviations from a desired alignment of the holder part based on elastic deformation of the holder due to the weight force of the workpiece, the holder has at least one mechanical or hydraulic pretensioning device arranged on or in it. The pretensioning device can be used to pretension the material of the holder, so that the pretensioning device applies a tensile stress or a compressive stress to at least one part of the holder. This can counteract a deviation of position due to an elastic deformation of the holder.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: July 13, 2021
    Assignee: GEBR. HELLER MASCHINENFABRIK GMBH
    Inventors: Juergen Walz, Erhard Hummel
  • Patent number: 8419323
    Abstract: A method and machine for machining shafts, such as crankshafts of an internal combustion engine wherein the shaft supported on a workpiece carrier rotatably about its axis and the carrier is movable relative to a milling tool adjustably supported on the machine, the bearing surfaces of the shaft are fine-machined by a milling tool taking into consideration the resiliency and the bending of the shaft by the engagement force of the milling tool during fine cutting of the bearing surfaces in the various angular rations of the shaft and the axial bearing location between the shaft ends so as to provide for a perfect final round cutting of the bearings without the need for wet grinding. The fine machining is preferably achieved by dry machining and orthogonal rotational milling, all main bearings and lifting bearings being machined in a single clamping from the rough machining dimensions to the final dimension.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: April 16, 2013
    Assignee: Gerbrüder Heller Maschinenfabrik GmbH
    Inventors: Bernd Faigle, Wolfgang Marker
  • Patent number: 7784379
    Abstract: In a cover arrangement for a machine tool for covering guide and drive structures, comprising a pleated wall arrangement which can be expanded and compressed upon movement of a carriage between which and a machine wall it is connected. The pleated wall structures is provided with armor lamellas which are anchored to the pleat sections of the wall structures and over-lap for covering the pleated wall structure which is movably supported on guide tracks which are disposed in planes extending at an obtuse angle facilitating installation and removal of the cover arrangement.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: August 31, 2010
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventor: Michael Schirling
  • Patent number: 7419460
    Abstract: In a machine tool arrangement comprising a machine tool component including a mounting structure for a work piece to be machined by a suitable metal cutting tool, a housing enclosing the machine tool component, a horizontal support beam is disposed above the housing and carries handling equipment for supplying work pieces from an adjacent loading area to the machine component for machining and returning the finished work pieces to the storage structure and an intermediate storage structure is disposed near the machine tool component for temporarily storing unfinished work pieces to be machined and finished work pieces after being machined.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: September 2, 2008
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventors: Heinrich Bonfert, Georg Deponte, Wolfgang Märker, Michael Herkert
  • Patent number: 7179029
    Abstract: A machine for machining workpieces has at least one milling tool with an internal cutter. The machine is provided with a first guide system and a second guide system parallel to the first guide system. The first guide system has at least one compound slide having a slide part, wherein the at least one compound slide is moveable in a longitudinal direction of the first guide system and wherein the slide part is moveable transversely to the longitudinal direction. A milling tool is secured on the slide part. The first and second guide systems have sliding guides or roller bearing guides. The at least one compound slide has a transverse guide system and the slide part is guided on the transverse guide system.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: February 20, 2007
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventors: Christoph Hemming, Wolfgang Märker, Heinrich Bonfert
  • Patent number: 6834539
    Abstract: A rotary machine element has at least one functional part performing movements into stop positions, which stop positions are nominal stop positions or mechanical terminal stop positions and are functionally correlated. At least one position sensor is provided for detecting individual actual position values of the stop positions independently from one another. At least one position sensor is located in a control path between the at least one functional part and an NC control. The control path is active in positions between the nominal stop positions; the mechanical terminal stop positions; or the nominal stop positions and the mechanical terminal stop positions. Based on acquired actual position values of the at least one functional part, the speed and acceleration of the at least one functional part are determined by NC-control.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: December 28, 2004
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventor: Bernd Hans Faigle
  • Publication number: 20040247408
    Abstract: A machine for machining workpieces has at least one milling tool with an internal cutter. The machine is provided with a first guide system and a second guide system parallel to the first guide system. The first guide system has at least one compound slide having a slide part, wherein the at least one compound slide is moveable in a longitudinal direction of the first guide system and wherein the slide part is moveable transversely to the longitudinal direction. A milling tool is secured on the slide part. The first and second guide systems have sliding guides or roller bearing guides. The at least one compound slide has a transverse guide system and the slide part is guided on the transverse guide system.
    Type: Application
    Filed: April 8, 2004
    Publication date: December 9, 2004
    Applicant: GEBR. HELLER MASCHINENFABRIK GMBH
    Inventors: Christoph Hemming, Wolfgang Marker, Heinrich Bonfert
  • Patent number: 6796199
    Abstract: A drive for machine components has at least one threaded spindle having spindle sections with oppositely oriented axial pitch. Nuts are seated on the at least one threaded spindle and engage the spindle sections, respectively. At least one motor is connected to the at least one threaded spindle for driving the at least one threaded spindle. A first one of the nuts is connected to a machine component. A second one of the nuts is spatially stationary. The at least one threaded spindle provides a drive moment for driving the machine component.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: September 28, 2004
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventor: Artur Kurz
  • Publication number: 20030115736
    Abstract: In a method for stocking tool magazines of a device for machining workpieces, the device having at least a first spindle and a second spindle configured to be independently movable relative to one another at least in one axis, wherein the first and second spindles have correlated therewith at least a first tool magazine and a second tool magazine, respectively, workpiece machining is continued by the second spindle during stocking of the first tool magazine, and workpiece machining is continued by the first spindle during stocking of the second tool magazine. Alternatively, stocking the first and second tool magazines can be carried out simultaneously.
    Type: Application
    Filed: September 11, 2002
    Publication date: June 26, 2003
    Applicant: Gebr. Heller Maschinenfabrik GmbH
    Inventors: Artur Kurz, Wolfgang Liebrich
  • Publication number: 20030071526
    Abstract: A rotary machine element has at least one functional part performing movements into stop positions, which stop positions are nominal stop positions or mechanical terminal stop positions and are functionally correlated. At least one position sensor is provided for detecting individual actual position values of the stop positions independently from one another. At least one position sensor is located in a control path between the at least one functional part and an NC control. The control path is active in positions between the nominal stop positions; the mechanical terminal stop positions; or the nominal stop positions and the mechanical terminal stop positions. Based on acquired actual position values of the at least one functional part, the speed and acceleration of the at least one functional part are determined by NC-control.
    Type: Application
    Filed: October 11, 2002
    Publication date: April 17, 2003
    Applicant: Gerb. Heller Maschinenfabrik GmbH
    Inventor: Bernd Hans Faigle
  • Publication number: 20030029259
    Abstract: A drive for machine components has at least one threaded spindle having spindle sections with oppositely oriented axial pitch. Nuts are seated on the at least one threaded spindle and engage the spindle sections, respectively. At least one motor is connected to the at least one threaded spindle for driving the at least one threaded spindle. A first one of the nuts is connected to a machine component. A second one of the nuts is spatially stationary. The at least one threaded spindle provides a drive moment for driving the machine component.
    Type: Application
    Filed: April 5, 2002
    Publication date: February 13, 2003
    Applicant: Gebr. Heller Maschinenfabrik GmbH
    Inventor: Artur Kurz
  • Patent number: 6513988
    Abstract: A bearing device for a threaded spindle has a bearing housing with at least one receptacle configured to receive a bearing part of the threaded spindle. The at least one receptacle is a clamping bushing securing the bearing part by electromechanical elements or fluid-operated elements. The clamping bushing has a wall that is elastically deformable by a pressure medium. The wall and the bearing housing define an annular chamber configured to receive the pressure medium. A control unit is provided to control the pressure of the pressure medium and thus the clamping action of the clamping bushing.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: February 4, 2003
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventor: Artur Kurz
  • Patent number: 6508150
    Abstract: A reversible cutting tip for a cutting tool has a cutting wedge defined by a first face and a first flank. The cutting wedge has a clearance angle of 0° to 3°. The first flank is produced by applying a first coating to the cutting tip and the first face is produced by applying a second coating to the cutting tip. The tool is employed for removing cuttings from a workpiece by the cutting tips and for subsequently smoothing the crack surface of the workpiece, created by removing the cuttings, by employing the first flanks.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: January 21, 2003
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventor: Wolfgang Bertschinger
  • Publication number: 20010021286
    Abstract: A bearing device for a threaded spindle has a bearing housing with at least one receptacle configured to receive a bearing part of the threaded spindle. The at least one receptacle is a clamping bushing securing the bearing part by electromechanical elements or fluid-operated elements. The clamping bushing has a wall that is elastically deformable by a pressure medium. The wall and the bearing housing define an annular chamber configured to receive the pressure medium. A control unit is provided to control the pressure of the pressure medium and thus the clamping action of the clamping bushing.
    Type: Application
    Filed: March 7, 2001
    Publication date: September 13, 2001
    Applicant: Gebr. Heller Maschinenfabrik GmbH
    Inventor: Artur Kurz
  • Patent number: 6287057
    Abstract: A device for machining bores in a workpiece has a tool with a base member and cutting blades mounted on the base member for machining coaxial bores in the workpiece. At least one guide bearing for supporting the tool is provided. The at least one guide bearing has a guide bearing axis coaxial to the workpiece axis. The tool and the at least one guide bearing are shaped such that the tool is guided and centered in the machining position of the tool by the at least one guide bearing and is insertable and removable in a radial offset position from the bores and the at least one guide bearing.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: September 11, 2001
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventor: Artur Kurz
  • Patent number: 5373631
    Abstract: A method for machining a rotation-symmetrical workpiece surface includes the steps of rotating the workpiece during machining, roughing the workpiece surface, smoothing in a longitudinal turning process the workpiece surface with a cutting tool having a cutting blade with a divided edge arrangement, advancing the cutting tool in a radial direction relative to the workpiece surface in the smoothing step, and moving the cutting tool in the axial direction of the workpiece surface for carrying out the longitudinal turning process. The cutting tool for carrying out the aforementioned method comprises at least one first cutting blade for the smoothing step, the first cutting blade having at least two adjacent edges axially spaced at a distance from one another.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: December 20, 1994
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventor: Karlheinz Schmid
  • Patent number: 5275072
    Abstract: A center drive support for supporting a crankshaft during machining in a machining device comprises a rotatably drivable support member and a drive unit. The rotatably drivable support member has a carrier with at least two clamping elements with clamping ends. The clamping elements are displaceable between a clamping position and a release position for the crankshaft. The clamping elements clamp the crankshaft between their clamping ends. The drive unit is connected to the clamping elements for applying a required clamping force in the clamping position during rotation of the support member. The drive unit includes a clamping motor and a drive shaft connected to the clamping motor. It further includes a gear unit connected between the drive shaft and the carrier. The gear unit, during machining of the crankshaft in the clamping position, follows the rotation of the support member against the toque of the clamping motor.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: January 4, 1994
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventors: Karlheinz Schmid, Heinrich Bonfert, Werner Ott, Bernd Faigle