Class / Patent application number | Description | Number of patent applications / Date published |
451047000 | Gear or worm abrading | 37 |
20090053977 | Tool and method for discontinuous profile grinding - A gear grinding tool can be trued and re-profiled. The geometry of the individual profiles in the direction of the tool axis is designed so that at least more than two, preferably all, flanks of the tool are used for rough machining of the work piece flanks, and that during finishing the re-profiled flanks provided only for roughing are set back far enough so that during finishing they do not come into contact with the work piece flanks. | 02-26-2009 |
20090286455 | METHOD FOR SIZING SINTERED METAL - A method for producing a mechanical part comprising sizing a sintered metal unit with application of a lubricating oil composition containing (A) a lubricating base oil having a kinematic viscosity of 0.5 to 150 mm | 11-19-2009 |
20100029183 | METHOD FOR THE PRODUCTION OF A WORKPIECE AND GRINDING MACHINE - The invention relates to a method for the production of a rotor of a rotary screw compressor ( | 02-04-2010 |
20100041319 | GRINDING WHEEL AND METHOD - A grinding wheel for grinding features into a work-piece and a corresponding method for grinding the features into the work-piece are disclosed herein. The grinding wheel includes an outer periphery with a first axial end having a first diameter. The grinding wheel also includes a second axial end spaced from the first axial end along a centerline axis. The grinding wheel also includes a plurality of discrete grinding projections for removing material from the work-piece. Each of the plurality of discrete grinding projections extends radially outward from the outer periphery and is positioned along the centerline axis in spaced relation to one another. The plurality of grinding projections have working heights that vary relative to one another. In the inventive method, a grinding wheel is rotated about an axis of rotation. The axis of rotation is arranged transverse to and spaced from a centerline axis of an arcuate surface of a work-piece. The grinding wheel and the arcuate surface are moved relative to one another and a plurality of grooves having variable depth are concurrently formed along at least a portion of a perimeter of the arcuate surface with the grinding wheel during at least part of the moving step. | 02-18-2010 |
20100041320 | METHOD AND APPARATUS FOR HONING A WORKPIECE AND A WORKPIECE - A method for honing a workpiece by passing a workpiece through a hone tool having a plurality of abrasive surfaces configured to remove a portion of all exterior machining surfaces of the workpiece as it is passed through the hone tool, the exterior machining surfaces being non-uniform and wherein the hone tool is configured to hone all of the exterior machining surfaces simultaneously as workpiece is passed through the hone tool. An assembly for honing a workpiece, the assembly having a plurality of hone tools each having abrasive surfaces configured to remove a portion of exterior non-uniform surfaces of a workpiece pushed through the hone tool, wherein the hone tool is configured to surround the entire periphery of the workpiece being passed therethrough. | 02-18-2010 |
20100062689 | WORKING APPARATUS - A working apparatus, provided with a base stage, work hold and rotation means for holding and rotating a work, working means movable toward and away from the work via slider mechanism and having a working tool, press means for pressing the working tool toward the work via the working means, and trace means pressed toward the work together with the working tool by the press means and in contact with the work and moving the working means as a whole in forward and rearward directions according to outer shape of the work. By pressing of the pressing means, the working tool deburs and chamfers under control of working volume by the trace means. The work hold and rotation means has work rotation axis angle adjustment mechanism, for adjusting angle of rotation axis of the work by holding the work. The working apparatus can precisely debur and chamfer complicated shape of work such as worm gear. | 03-11-2010 |
20100261415 | TOOTH FLANK POLISHING TOOL - The invention relates to a tooth flank polishing tool ( | 10-14-2010 |
20100273400 | METHOD AND DEVICE FOR REMOVING A SECONDARY BURR ON AN END-CUT WORK PIECE WHEEL - A method and a device for removing secondary burrs raised on the tooth flanks of a work piece wheel by a chamfering of the end tooth edges of said work piece wheel provides a tool wheel that rotationally meshes with the work piece wheel. Said tool wheel has cutting edges on its tooth flanks ( | 10-28-2010 |
20110076926 | GEAR GRINDING TOOL AND METHOD OF USING GEAR GRINDING TOOL - A gear grinding tool, which includes a helical tooth with grinding faces on surfaces thereof, grinds tooth faces of a gear as a workpiece with the grinding faces. The grinding face includes a rough grinding face for performing a rough grinding process. The grinding face includes a rough grinding face for performing a rough grinding process, and the rough grinding face includes a forming line for performing a finishing process. | 03-31-2011 |
20110275287 | INTERNAL GEAR MACHINING METHOD - Provided is an internal gear machining method capable of achieving improvement of machining accuracy and extension of the tool life by increasing a slip velocity. For this purpose, internal gear machining is performed on a workpiece (W) by synchronously rotating the workpiece (W) and a barrel-shaped threaded grinding wheel ( | 11-10-2011 |
20120184187 | METHOD FOR MACHINING INTERNALLY TOOTHED GEAR AND METHOD FOR DRESSING TOOL USED FOR SAME - A method is disclosed for dressing a tool used for machining an internally toothed gear. The method includes meshing an internally toothed gear-like dressing gear, which is rotatable about the dressing gear rotation axis, with a barrel-shaped, screw-like grindstone. For machining an internally toothed gear, the outer diameter of the screw-like grindstone after dressing is estimated before dressing, the angle of intersection between a dressing gear rotation axis and the screw-like tool rotation axis is set on the basis of the estimated outer diameter of the screw-like grindstone after dressing, and dressing is performed with the dressing gear and the screw-like grindstone meshed with each other at the set angle of intersection between the axes. | 07-19-2012 |
20120309271 | Method for Dressing a Tool - 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. | 12-06-2012 |
20120309272 | PROCESSING METHOD FOR CONCAVE-CONVEX GEAR - A relative movement trajectory of each convex tooth pin of a mating gear with respect to a concave-convex gear at the time when torque is transmitted between the mating gear and the concave-convex gear (nutation gear) may be expressed by a first linear axis, a second linear axis, a third linear axis, a fourth rotation axis, a fifth rotation axis and a sixth indexing axis. Then, a relative movement trajectory of each convex tooth pin of the mating gear, expressed by the first linear axis, the second linear axis, the third linear axis, the fifth rotation axis and the sixth indexing axis in the case where the fourth rotation axis is brought into coincidence with the sixth indexing axis, is calculated, and at least one of a disc-shaped workpiece and a working tool is moved on the basis of the calculated relative movement trajectory. | 12-06-2012 |
20130090043 | METHOD FOR DRESSING OF A MULTIPLE THREAD GRINDING WORM AND FOR GRINDING AND GRINDING WORM - The invention relates to a method for dressing of a multiple thread grinding worm, wherein the contour of the flanks of the screw channels which are running spiral-like and parallel to another is produced by a dressing tool. To obtain an improved grinding result especially with reduced dressing time the invention proposes that in at least two screw channels contours of the flanks are produced, which are distinguished from another by their geometry and/or by their surface structure. Furthermore, the invention relates to a method for grinding of a work piece and a grinding worm. | 04-11-2013 |
20130122787 | Method for Generating of Non-Straight Gear Teeth - A gear teeth generation method carried out on multi-axis machines, using a disk tool. The tool travels along the gear tooth where its motion along a gap adjacent to the gear tooth is synchronized with the roll motion performed by said multi-axis machine so that the pressure line is on the machining surface of the tool. The tool machines a bottom land surface of the tooth with its perimeter. Machining of the tooth flank starts with the tool positioned such that the pressure line is near a first edge of the tooth flank. Positions of the tool and the tooth are changed to cause the pressure line to move away from the first edge of the tooth flank. Machining is finished when the pressure line reaches the opposite edge of the tool flank. The pressure line is on the machining surface of the tool throughout every stage of machining. | 05-16-2013 |
20130244546 | METHOD FOR MACHINING A WORKPIECE WITH A WORM-SHAPED CUTTING TOOL - The invention relates to a method for machining a workpiece, preferably of a gear, with a multiple thread worm-shaped cutting tool with several parallel running helical and ridge-shaped cutting edges. To obtain a higher quality of the machining operation the invention proposes the following steps for the method: a) Bringing the cutting tool with the workpiece into mesh by inserting of a first helical cutting edge of the cutting tool in a first gap of the workpiece which has to he machined or has to be produced and machining of the workpiece with the cutting tool in this contact situation; b) Bringing the cutting tool and the workpiece out of mesh; c) Bringing the cutting tool with the workpiece again into mesh by inserting of the first helical cutting edge of the cutting tool in a second gap of the workpiece which is different from the first gap and machining of the workpiece with the cutting tool. | 09-19-2013 |
20130280990 | METHOD AND APPARATUS FOR HARD FINISHING MODIFIED GEARS - The present disclosure relates to a method for the manufacture of a workpiece having a corrected gear geometry and/or a modified surface structure, in particular by a hard finishing process, in particular generation grinding or honing. Provision is made in this respect that it is achieved by a direct generation of a wobble movement and/or of an eccentricity of the tool that a modification, in particular a profile modification or profile waviness, and/or a defined periodic flank waviness is generated on the active surface of the workpiece machined therewith. | 10-24-2013 |
20130288576 | GEAR GRINDING METHOD - Provided is a gear grinding method capable of improving processing accuracy and easily adjusting the crowning shape by simplifying a processing operation. To this end, a work piece (W) is ground by a gear-shaped grinding stone ( | 10-31-2013 |
20130309944 | Method for Manufacturing of a Rotor - A method for manufacturing a rotor includes the following operations: the clamping of a workpiece in a grinding machine; the performance of one or more cylindrical grinding operations whereby a rotor shaft section is ground to the desired diameter with a cylindrical grinding disk; the performance of one more profile grinding operations whereby a rotor body is profiled with a profile grinding disk. During the manufacture of the rotor in the grinding machine, the workpiece is not undamped and the cylindrical grinding operations and the profile grinding operations are done with the same grinding machine. | 11-21-2013 |
20140141699 | SCREW-SHAPED GRINDSTONE FOR GRINDING GEARS AND METHOD FOR GRINDING GEARS - Provided are: a screw-shaped grindstone for grinding gears that has a simple configuration and is capable of grinding gears with high precision; and a method for grinding gears. The screw-shaped grindstone ( | 05-22-2014 |
20140199920 | HONING METHOD WITH CENTERING OF A WORKPIECE ON A ROLLING VERIFICATION STATION - A method for honing a workpiece includes moving the workpiece onto an intermediate retention member which is rotatable about a vertical workpiece axis. Then, the workpiece is brought into a rolling engagement with a teaching wheel. An angular transfer position of the workpiece is established by the rotary sensor of the teaching wheel retention member. Next, the workpiece is transferred from the intermediate retention member onto a workpiece spindle, where the workpiece is retained onto the workpiece spindle. Then, the workpiece goes through a honing process by bringing the workpiece into a synchronized rolling engagement with a honing tool by utilizing the angular transfer position of the workpiece, thereby eliminating a separate centering step of the workpiece. | 07-17-2014 |
20140287658 | BONDED ABRASIVE ARTICLE - The present invention relates to a bonded abrasive article comprising specific shaped abrasive particles and a bonding medium comprising a vitreous bond. The present invention also relates to the use of an article according to the present invention in grinding applications, in particular in high performance grinding applications and to the use of an article according to the present invention for abrading a workpiece material particularly a workpiece material selected from steels, non-ferrous metals, and alloys. In addition, the present invention relates to a method for abrading a workpiece, the method comprising frictionally contacting at least a portion of an abrasive article according to the invention with a surface of a workpiece; and moving at least one of the workpiece or the abrasive article to abrade at least a portion of the surface of the workpiece. | 09-25-2014 |
20150038058 | Method for Detecting And/Or Preventing Grind Burn - The present invention provides a method of detecting and preventing grind burn from developing on a gear. The method includes performing acoustic emission testing while the gear is being ground during a grinding operation. The grinding wheel is evaluated during an eddy current test to detect material buildup on the grinding wheel which could cause grind burn. In addition, the method includes collecting swarf from the gear during the grinding operation and inspecting the swarf for an indication of grind burn. | 02-05-2015 |
20150056893 | METHOD FOR POLISHING BALL SCREW AND BALL SCREW POLISHING APPARATUS - A method for polishing a ball screw comprising a screw shaft defining a screw axis. The screw shaft is formed with a screw groove. The method comprises the steps of: rotating the screw shaft at a rotational speed about the screw axis; conveying a polishing tape having a polishing portion traveled around an outer peripheral surface of a pressing roller, the press roller being configured to rotate about a rotational axis; guiding the polishing tape such that the polishing portion is traveled around the outer peripheral surface; pressing the polishing portion against the screw groove; tilting the pressing roller such that the rotational axis is aligned with a lead angle; oscillating the pressing roller linearly along the rotational axis; moving the polishing tape at a moving speed in a direction parallel to the screw axis; and synchronizing the rotational speed with the moving speed based on a lead. | 02-26-2015 |
20150290730 | METHOD FOR HARD FINE MACHINING OF A WORKPIECE WITH A WORM-SHAPED CUTTING TOOL - A method for hard fine machining of a workpiece with a worm-shaped cutting tool, wherein the workpiece has a profiling along its circumference. The cutting tool has a machining surface. A hard machining process of the profiling is carried out at simultaneous synchronized rotation of the workpiece around its axis and of the cutting tool around its axis with given meshing of the machining surface into the profiling by moving the cutting tool in the direction of the axis of the cutting tool. A shift movement is superposed to the cutting tool in the direction of the axis of the cutting tool during the hard machining. The shift movement includes at least one first section at which the cutting tool is moved in one of its axial directions and of at least one second section at which the cutting tool is moved in the other of its axial directions. | 10-15-2015 |
20150336190 | METHOD OF MACHINING A ROTOR WITH VARIABLE-LEAD SCREW - A method of machining, with a formed tool, a first rotor and a second rotor with mutually complementary meshing threads involves rotating a first workpiece about a longitudinal axis of the workpiece. The tool makes one or more passes along the longitudinal axis of the workpiece as the workpiece rotates so as to remove material, thereby forming the flanks of each helix of the first rotor's thread. The value of at least one of the parameters that collectively define the relative position and relative movement of the workpiece and formed tool is varied during each pass so as to vary the lead of the thread. The above steps are repeated for a second workpiece, thereby forming the second rotor. Adjustments are made to at least one of said parameters during one or more of the passes in order to maintain mutually complementary shapes of the threads of the rotors. | 11-26-2015 |
20150360308 | GEAR MACHINING APPARATUS - Provided are a gear machining apparatus and a gear machining method with which the surface roughness, in a tooth profile evaluation range, of the surfaces of the teeth of a gear can be improved. This gear machining apparatus ( | 12-17-2015 |
20160089735 | SWING MOTION FOR MANUFACTURING NON-GENERATED BEVEL GEARS WITH END RELIEF - A motion which creates an end relief and which is integrated into the plunging cycle of non-generated bevel gears. The tool, after feeding to the correct tooth forming position in case of non-generated gears, is swung sideways out of cutting or grinding contact with the slot instead of along a withdraw path which is identical to the plunge path but opposite in direction. | 03-31-2016 |
20160089736 | LAPPING MACHINE AND LAPPING METHOD - A lapping machine includes a lap that is meshed with a workpiece gear and laps the workpiece gear. The lap is meshed with the workpiece gear such that: there is a clearance in a prescribed amount between a tooth tip of the lap and a bottom land of the workpiece gear, and there is a clearance in the prescribed amount between a bottom land of the lap and a tooth tip of the workpiece gear; and an effective tooth tip of the lap is located closer to the bottom land of the workpiece gear than a curved line indicating a tooth profile management diameter of the workpiece gear is. | 03-31-2016 |
20160107291 | CONTINUOUS-GENERATION GEAR-WHEEL GRINDING METHOD - A continuous-generation gear grinding method of conducting a gear grinding process such that while a thread-shaped grinding wheel is rotated around an axial center thereof and fed in an axial center direction, a position coming into contact with abrasive grains is constantly changed in the presence of a water-soluble grinding fluid by performing a grinding feed in a direction parallel to an axial center of a gear blank and by serially rotating the gear blank around the axial center, the grinding wheel being a vitrified grinding wheel having abrasive grains bonded by a vitrified bond with pores formed among the abrasive grains, and the abrasive grains having a grain size of F120 to F180. | 04-21-2016 |
20160121414 | INTERNAL GEAR GRINDING METHOD - Provided is an internal gear grinding method that makes it possible to grind an internal gear having arc-shaped teeth in a short amount of time. To this end, an internal gear having arc-shaped teeth and a threaded grindstone with a barrel shape having blades with a shape corresponding to the arc shape of the teeth are engaged at a predetermined axis intersection angle, and the internal gear and the threaded grindstone are made to rotate in synchronization with each other so that the tooth surface of the internal gear is ground by the blade surface of the threaded grindstone. | 05-05-2016 |
20160136744 | ROTARY MACHINING APPARATUS AND MACHINING METHOD USING THE SAME - A rotary machining apparatus that includes a rotary that supports and rotates a workpiece having helical teeth; a grinding wheel that grinds the helical teeth of the workpiece to be rotated by the rotary with grinding teeth; and a conveyor for carrying the workpiece in and out of the rotary, wherein the conveyor includes, around a turning center axis, a plurality of grippers for sandwiching the workpiece and a plurality of dressers for forming toothed surfaces of the grinding teeth, and turns around the turning center axis so that the grippers sequentially approach the rotary and the dressers sequentially approach the grinding wheel, and dress teeth of the dressers each have different shapes of toothed surfaces. | 05-19-2016 |
20160151847 | METHOD AND DEVICE FOR FINE MACHINING A TOOTHED WORKPIECE, AND PROGRAM FOR CONTROLLING SAID DEVICE | 06-02-2016 |
20160184910 | MACHINE FOR MACHINING WORKPIECES - A machine for machining workpieces includes a machine frame ( | 06-30-2016 |
20160199926 | INTERNAL BEVEL GEAR | 07-14-2016 |
20160250701 | MACHINING HEAD FOR A GEAR CUTTING MACHINE AND METHOD FOR TOOTHING A WORKPIECE, IN PARTICULAR A WORM SHAFT OR TOOTHED RACK | 09-01-2016 |
20220134458 | GEAR PROCESSING APPARATUS AND METHOD - The presented disclosure provides a gear processing apparatus, including a base, a driving unit, a bearing unit, a grinding assembly and a control unit. The driving unit, the bearing unit and the grinding assembly are arranged on the base. The bearing unit is used to carry the gear and can be activated by the driving unit to perform plural first corresponding axial movements relative to the bearing unit. The grinding assembly includes a grinding member. The grinding assembly can be activated by the driving unit to perform plural second corresponding axial movements relative to the bearing unit to contact the tooth surface of the gear by the grinding member. The control unit is used to control the driving module to apply additional movement to at least one of the plural first corresponding axial directions or/and at least one of the plural second corresponding axial directions during the grinding process to change the grinding directions of the tooth surface of the gear generated by the grinding member. | 05-05-2022 |