Drill, Thread, Thread Cutter, Reamer, Or Rotary Cutter Abrading Patents (Class 451/48)
  • Publication number: 20150071718
    Abstract: The radial run-out tool (2), particularly a drill or a cutter, has a basic body (12) extending in an axial direction (4) and comprises at least two chip grooves (14), to which a guide chamfer (22) is connected in the rotational direction (24), with a ridge (15) being formed between them. A radial clearance is connected to the guide chamfer (22). In order to enable simple and economical production of such type of radial run-out tool (2), an unprocessed rod (30) is ground non-concentrically, in a first process step, such that a radius (R) of the unprocessed rod (30) varies, depending on the angle, between a maximum radius (R2) and a minimum radius (R1). In a second process step, the chip grooves (14) are grounded down such that the guide chamfers (22) are formed at the positions with the maximum radius (R2) and the radius (R) is subsequently reduced downstream of the respective guide chamfer (22) in order to form the radial clearance (28).
    Type: Application
    Filed: September 8, 2014
    Publication date: March 12, 2015
    Inventor: Herbert Rudolf KAUPER
  • Publication number: 20140366701
    Abstract: A scribing wheel for scribing a brittle material-made substrate. A disc-shaped scribing-wheel base material in use is so designed that a mid-portion of a disc periphery has the largest diameter. A diamond film is formed on the periphery by a CVD method. The periphery is ground in the middle so that a plane including a circle defined by ridge line becomes perpendicular to the central axis of the scribing wheel.
    Type: Application
    Filed: August 28, 2014
    Publication date: December 18, 2014
    Applicant: MITSUBOSHI DIAMOND INDUSTRIAL CO., LTD
    Inventor: Naoko TOMEI
  • Publication number: 20140273761
    Abstract: A honing apparatus includes a sharpening stone that has a sharpening surface configured to sharpen the edge of the blade upon engaging contact with the edge of the blade. A frame is operatively coupled to the sharpening stone, and a weight element is supported by the frame and positioned so as to urge the sharpening stone toward the edge of the blade. The frame may be pivotally coupled to a fixed element at a pivoting location, and the weight element may be positioned so as to create a moment about the pivoting location, with the moment urging the sharpening stone toward the edge of the blade.
    Type: Application
    Filed: April 8, 2013
    Publication date: September 18, 2014
    Applicant: SCA Hygiene Products AB
    Inventors: Arno Robert ARNDT, Lon Martin King
  • Patent number: 8801502
    Abstract: A tool for in-situ airfoil contouring is provided. The tool has a pathway for an airfoil edge wherein the edge movement is limited and further wherein the edge is exposed to a grinding structure having a preselected profile shape therein. The tool makes this contouring process available for airfoils without the necessity of removing the airfoils from, for example, an aircraft engine.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: August 12, 2014
    Assignee: General Electric Company
    Inventors: Henry Ng, Daniel O'Reilly
  • Patent number: 8801503
    Abstract: A tool head for a machine tool comprising a plurality of tool spindles with each tool spindle being rotatable about a respective tool axis. The plurality of tool spindles comprises at least a first tool spindle rotatable about a first tool axis, a second tool spindle rotatable about a second tool axis and a third tool spindle being rotatable about a third tool axis with the first, second and third tool axes being parallel to one another. The first, second and third tool spindles are arranged on the tool head whereby one of the first, second and third tool spindles faces a first direction and the other two of the first, second and third tool spindles face a second direction with the first and second directions being 180 degrees apart. The tool spindles are preferably grinding spindles on a machine for grinding bevel gear cutting tools.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: August 12, 2014
    Assignee: Gleason Cutting Tools Corporation
    Inventors: Roger L. Hackman, Wayne Martin, Mark A. Ritchie
  • Publication number: 20140213156
    Abstract: A method for modifying plunge shaving cutters aims to modify a plunge shaving cutter through a grinding tool. The plunge shaving cutter has a plurality of helical teeth spaced from each other. The helical teeth have a machining-intended side. The method of modification includes the steps of: positioning the plunge shaving cutter on a gear forming grinder with the machining-intended side in contact with the grinding tool; moving the plunge shaving cutter according to a variable rotation amount and a first variable movement amount; moving the grinding tool according to a second variable movement amount to perform a helical movement against the plunge shaving cutter and a modification process on the machining-intended side. Thus the existing gear forming grinder can be applied to the plunge shaving cutter for machining to improve machining speed.
    Type: Application
    Filed: January 28, 2013
    Publication date: July 31, 2014
    Applicant: LUREN PRECISION CO., LTD.
    Inventors: CHIN-LUNG HUANG, SHI-DUANG CHEN, Kuang-Rong CHANG
  • Patent number: 8789444
    Abstract: A method of producing an endodontic file that involves grinding in a plane substantially parallel to the longitudinal axis of a rotating dental instrument blank. By grinding the dental instrument blank in this manner, the torsional strength of the resulting endodontic file is not eroded during its production, thereby providing a file that is less susceptible to breakage during its use.
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: July 29, 2014
    Inventor: William B. Johnson
  • Patent number: 8790156
    Abstract: A personal computer has correction coefficients (?) for tooth-profile error correction and correction coefficients (?) for meshing position correction which are set for each number of times a shaving cutter is sharpened, and for each cutter feature of the shaving cutter. Target tooth-profile data (Do), tooth-profile error data (?D) which is the difference between the target tooth-profile data (Do) and measured tooth-profile data (Dm), and the correction coefficient (?) and the correction coefficient (?) captured in correspondence with the number of times sharpening is performed, and the cutter features are applied to an equation Dcc=Do+?·?D+? to find aimed tooth-profile data (Dcc). Shaving-cutter tooth-profile data (ds) is found from the aimed tooth-profile data (Dcc). Thus, the shaving cutter can be sharpened appropriately even when the outer diameter and tooth thickness of the shaving cutter are reduced by sharpening the shaving cutter.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: July 29, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yoshikoto Yanase, Ryuzo Hayashi
  • Publication number: 20140169898
    Abstract: A twist drill for drilling composite materials includes a shank; a drill body; a drill tip having a cutting edge, a chisel edge, and a secondary chisel edge, wherein the secondary chisel angle of the drill tip is 145° to 165 and the point angle is 70° to 100°; and a flute extending from the drill tip to the drill body. The flute has a constant helix, and the helix angle of the flute being selected from the range 45° to 55°. A method of drilling a composite material comprising fibres uses the twist drill of the present embodiment. Suitably, the composite material is carbon fibre reinforced plastic or glass fibre reinforced plastic, and optionally being a laminate material such that the method comprises stack drilling. Embodiments achieve a combination of good hole quality, good tool life and good hole size spread.
    Type: Application
    Filed: June 29, 2012
    Publication date: June 19, 2014
    Applicant: SANDVIK INTELLECTUAL PROPERTY AB
    Inventor: Wan Tsin Goh
  • Publication number: 20140140782
    Abstract: The invention relates to a rock drill comprising an insertion portion, a flute adjoined to the insertion portion, and a head portion adjoined to the flute, wherein the flute is of at least double-spiral configuration and correspondingly has at least two substantially spiral discharge grooves, to which respectively two substantially spiral flute webs forming the lateral groove walls are assigned. It is proposed that a constant spiral pitch is assigned to the first discharge groove, inclusive of the lateral groove walls thereof, along the drill longitudinal axis, and that at least one of the two flute webs assigned to the first discharge groove has or have along the drill longitudinal axis, at least in sections, a web spine width which changes, in particular, alternately.
    Type: Application
    Filed: April 10, 2012
    Publication date: May 22, 2014
    Applicant: ILLINOIS TOOL WORKS INC.
    Inventor: Rainer Lampe
  • Patent number: 8708777
    Abstract: Apparatus, systems and methods in accordance with the present invention are related to sharpening blades for rotary cutters. In one illustrative embodiment of a system in accordance with the present invention, an elongated sharpening stone is held at a desired angle between underlying support structures on a base and a securing cap. A planar edge of the stone is exposed in an adjustable channel between the stone and a slidably adjustable sidewall. The angle of the sharpening stone corresponds to correct angle for a sharpened edge on a rotary blade disposed on a hand held rotary cutter, which is inserted into the channel. By advancing the cutter through the channel an edge of the rotary blade may be honed and/or sharpened.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: April 29, 2014
    Inventors: Jim Bagley, Grace Elizabeth Bagley
  • Patent number: 8696408
    Abstract: A formed cutter 1 has on its tip side a blade 2 having a spiral cutting part 6 and a spiral flute 8 alternately disposed and rotating around a rotation axis O to perform cutting. The formed cutter 1 is manufactured by forming a depression 6B and a projection 6A with different diameters on a blade forming part 12, forming the spiral flute 8 on the blade forming part 12, and forming a rake face 4 on a side fall of the spiral flute 8 by bringing the grinding tool 18 in line contact with the side wall of the spiral flute 8 along a depth direction of the flute 8 while rotating the grinding tool 18 around its axial center.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: April 15, 2014
    Assignees: Mitsubishi Heavy Industries, Ltd., New Kenma Kiko Co., Ltd.
    Inventors: Nobuo Shimizu, Daisuke Tobari, Akiteru Asai
  • Patent number: 8644978
    Abstract: A machining apparatus and method for fabricating endodontic instruments adapted for use in performing root canal procedures is disclosed. The machining apparatus includes computer numerical control (CNC) machining that automates much of the fabrication process. The disclosed machining apparatus and method is programmable to efficiently produce varying configurations of endodontic instruments on the same machining apparatus.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: February 4, 2014
    Assignee: D & S Dental, LLC
    Inventors: Derek E. Heath, Brian J. Little, Steve A. Treadway
  • Publication number: 20140030960
    Abstract: Apparatus, systems and methods related to sharpening blades for rotary cutters. In one illustrative embodiment, a power sharpener system secures a rotary cutting blade between upper and lower columns that form a rotating axle in contact with upper and lower sharpening stones, each positioned at an appropriate angle to contact a cutting edges of the rotary blade for sharpening. The upper column may be rotatably attached to an upper cover or lid and the lower column rotatably disposed in a base. After the rotary blade is secured, an electric motor is used to rotate the column, contacting the edges of the blade against the stones to simultaneously sharpen both edges of the blade. In some embodiments, a retractable plate may be disposed around the lower column for placement of the rotary blade thereon and a lifting lever may be used to facilitate blade removal.
    Type: Application
    Filed: August 28, 2013
    Publication date: January 30, 2014
    Inventor: Jim Bagley
  • Publication number: 20130337726
    Abstract: A tool head for a machine tool comprising a plurality of tool spindles with each tool spindle being rotatable about a respective tool axis. The plurality of tool spindles comprises at least a first tool spindle rotatable about a first tool axis, a second tool spindle rotatable about a second tool axis and a third tool spindle being rotatable about a third tool axis with the first, second and third tool axes being parallel to one another. The first, second and third tool spindles are arranged on the tool head whereby one of the first, second and third tool spindles faces a first direction and the other two of the first, second and third tool spindles face a second direction with the first and second directions being 180 degrees apart. The tool spindles are preferably grinding spindles on a machine for grinding bevel gear cutting tools.
    Type: Application
    Filed: June 19, 2012
    Publication date: December 19, 2013
    Applicant: GLEASON CUTTING TOOLS CORPORATION
    Inventors: Roger L. Hackman, Wayne Martin, Mark A. Ritchie
  • Patent number: 8602841
    Abstract: A form tap includes a shank having a shank length and a thread portion that extends along at least a portion of the shank length. The thread portion includes a finishing portion and a chamfer portion. Each of the finishing portion and the chamfer portion include a plurality of threads and each thread has a crest and a root. The plurality of threads of both the finishing portion and the chamfer portion are spaced apart at a constant pitch, such that a crest-to-crest distance between adjacent threads remains constant along the entire thread portion.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: December 10, 2013
    Inventor: Harry Leroy Ellis
  • Patent number: 8591287
    Abstract: Methods for fabricating a honeycomb extrusion die from a die body include the step of machining extrusion slots with at least one grinding wheel to provide a honeycomb pattern of extrusion slots. In further examples, a plurality of the extrusion slots of the honeycomb pattern of extrusion slots can be machined with a wire electrical discharge machining process after machining the plurality of extrusion slots of the honeycomb pattern of extrusion slots with the grinding wheel.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: November 26, 2013
    Assignee: Corning Incorporated
    Inventors: David William Folmar, Aniello Mario Palumbo
  • Patent number: 8567059
    Abstract: A process for forming a firtree slot in a disc of a bladed rotor assembly for a gas turbine engine may include making a first pass with a machining quill to form a rough profile of the firtree slot, making a second pass with an inclined machining quill having the shape of one of the finished side wall profile of the firtree slot and avoiding engagement with the other side, and making a third pass with an inclined second quill having the shape of the other of the finished side wall profile of the firtree slot and avoiding engagement with the other side, in order to provide a firtree slot for receiving and fixing the root of a blade.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: October 29, 2013
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Sylvain Jetté, Yannick Dupont, Amr Elfizy
  • Publication number: 20130236260
    Abstract: A cutting tap includes a body having an axial forward end and an axial rearward end. The body has a threaded body portion with spiral flutes adjacent the axial forward end, a cylindrical shank portion adjacent the axial rearward end. The threaded body portion includes a chamfered fluted section and a constant diameter section. The threads have a chamfer relief extending radially inward from the cutting edge to a heel of a land. The amount of chamfer relief reaches a maximum value at a point between the cutting edge and the heel, and then becomes smaller between the point of maximum relief and the heel of the land to provide a clearance that reduces the propensity of the tap to chip.
    Type: Application
    Filed: March 7, 2012
    Publication date: September 12, 2013
    Applicant: KENNAMETAL INC.
    Inventors: Willard E. Henderer, Stephen Michael George, Timothy Austin Moore
  • Patent number: 8523634
    Abstract: The invention relates to a method for the grinding of a profile (1) of a workpiece (2) with a gear or profile grinding machine (3), wherein the profile (1) which has to be ground is successively at first ground during a roughing operation with a roughing grinding tool (4) and is afterwards ground during a finishing operation with a finishing grinding tool (5), wherein a stock of the profile (1) which has to be removed is ground by the roughing and the finishing operation, wherein the roughing grinding tool (4) and the finishing grinding tool (5) are arranged coaxially on a common tool spindle (6) or on two separate tool spindles and wherein a translational movement is created between the grinding tools (4, 5) and the workpiece (2) in a direction of a first axis (x) for carrying out a grinding stroke.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: September 3, 2013
    Assignees: Kapp GmbH, Niles Werkzeugmaschinen GmbH
    Inventor: Friedrich Woelfel
  • Patent number: 8512098
    Abstract: A material working process using a plated superabrasive grinding wheel having a superabrasive plating applied to a circumferential surface of a cylindrically shaped core. The plating is applied to at least a lower portion of a circumferential surface of the core continuing around a lower edge of the core and along a circumferential edge of a bottom surface of the core. The superabrasive grinding wheel is utilized by a Swiss style screw machine for abrading a raw bar stock. The grinding wheel is rotated abrading the raw bar stock as the stock is advanced along a longitudinal axis. The bar stock can be rotationally stationary to form a planar surface or rotating to form an arched surface. A machining lubricant is applied to the working interface for lubrication and cooling. The stationary work piece can be indexed to form repeated planar surfaces having various angles therebetween.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: August 20, 2013
    Inventor: Jeffrey Bonner
  • Publication number: 20130118313
    Abstract: A system for simultaneously forming multiple flutes in a carbide rotary cutting tool includes a chuck adapted to grasp a green rod member and selectively rotate the green rod member about, and translate the green rod member along, a first axis. The system further includes a mechanism adapted to simultaneously machine multiple flutes in the green rod member as the green rod member is rotated about, and translated along, the first axis.
    Type: Application
    Filed: November 15, 2011
    Publication date: May 16, 2013
    Inventors: PANKAJ K. MEHROTRA, CHRISTOPHER R. DUFFUS, EDWARD T. REBTOY
  • Patent number: 8425277
    Abstract: A device for sharpening a twist drill point by means of a rotating grindstone (12) in a grinding machine comprises a base plate (14) lockably articulated around an axis parallel with the axis of the grindstone (12), a drill holder (16) for releasably holding a twist drill (1) to be sharpened, and a guide member (15). The guide member has a back plate (21) and a front plate (22), lockably rotatable in relation to each other. The back plate (21) is connected to the base plate (14) for movements in the direction of the grindstone axis, and the front plate (22) has guide means (28, 29) for slidably guiding the drill holder (16) in the general direction towards and away from the grindstone (12).
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: April 23, 2013
    Assignee: TJ Utveckling AB
    Inventor: Margereta Norin Jansson
  • Patent number: 8419508
    Abstract: A method for screening abrasive wheels for fabricating a honeycomb extrusion die from a die body, and methods for fabricating a honeycomb extrusion die using an abrasive wheel assembly. One method for fabricating a honeycomb extrusion die includes measuring at least one of runout and thickness of each of a plurality of abrasive blades while rotating the blades, selecting a subset of the plurality of blades that have a measured runout or a measured thickness within a predetermined range, and mounting the subset of blades spaced from one another and concentrically aligned along a rotation axis of the abrasive wheel assembly.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: April 16, 2013
    Assignee: Corning Incorporated
    Inventors: Raymond Charles Cady, Mihir Mahendra Shah, Aric Bruce Shorey, Kevin Lee Wasson
  • Patent number: 8419504
    Abstract: In prior art, an additional radial inward movement that is performed in accordance with a rotating cam disk is imparted on the grinding disk in order to relief-grind the cutting teeth and the chamfer of taps and the cutting teeth of thread formers. The invention relates to a cam disk which can be rotated about an axis and is provided with a control cam. The control cam forms a group of curves according to a large number of possible undercut contours on the grinding teeth of the tap or thread former, which are to be relief-ground. In order to obtain a specific undercut contour on a cutting tooth, a limited angle of rotation is selected from the control cam. The area is mechanically, optically, or electronically scanned by means of a scanning device. To this avail, the cam disk performs an oscillating rotary movement only above the selected section of the control cam.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: April 16, 2013
    Assignee: Erwin Junker Maschinenfabrik GmbH
    Inventor: Erwin Junker
  • Patent number: 8413330
    Abstract: A method of producing an endodontic file that involves grinding in a plane substantially parallel to the longitudinal axis of a rotating dental instrument blank. By grinding the dental instrument blank in this manner, the torsional strength of the resulting endodontic file is not eroded during its production, thereby providing a file that is less susceptible to breakage during its use.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: April 9, 2013
    Inventor: William B. Johnson
  • Publication number: 20130048387
    Abstract: A hard metal insert for a drill bit for percussion drilling. A wear part includes a cap including a wear surface. A mount includes a cylindrical part having a cross-sectional area and a diameter. The cap includes a front part with an extension along an axis of symmetry of the insert from a first point on the wear surface to a second point in the cap. The front part includes a volume between a first plane intersecting the axis at the first point and a second plane intersecting the axis at the second point. The volume is ?0.6 times a cross-sectional area of the front part in the second plane times a distance along the axis between the first and second points. A diameter of the front part in the second plane is ?0.5 times the mount diameter and ?0.6 times the mount diameter.
    Type: Application
    Filed: October 1, 2010
    Publication date: February 28, 2013
    Applicant: ATLAS COPCO SECOROC AB
    Inventors: Göran Stenberg, Johan Wessberg
  • Publication number: 20130045058
    Abstract: A drilling tool includes at least two chip flutes and a chisel edge with a thinned region. The thinned region merges continuously into the chip flutes in such a way that the thinned region forms the end of the respective chip flute in the region of the chisel edge.
    Type: Application
    Filed: February 4, 2011
    Publication date: February 21, 2013
    Applicant: KENNAMETAL, INC.
    Inventor: Jurgen Schwagerl
  • Publication number: 20130028677
    Abstract: A method for manufacturing a drill bit (1), wherein in a first step the chip flutes (12) are ground into a round rod, in a second step the round rod is ground down to its outer diameter (15, 16) with simultaneous grinding of the drill-bit back (13), and wherein in a third step the drill-bit front (4) is ground, and a drill bit (1) having at least one chip flute (12) and one secondary cutting edge and one drill-bit back (13) adjoining the secondary cutting edge, the drill-bit back (13) sloping downwards as the distance from the secondary cutting edge increases, in order to create a clearance that becomes continuously larger as the distance from the point of intersection (19) of the secondary cutting edge with the drill-bit back (13) increases.
    Type: Application
    Filed: January 27, 2011
    Publication date: January 31, 2013
    Applicant: KENNAMETAL, INC.
    Inventors: Juergen Schwaegert, Peter Sollfrank
  • Publication number: 20130006248
    Abstract: A drill bit (1) having a central axis (A) has a tapered cutting end (2) part terminating in a drill tip (3) at one end of the drill bit (1) and a shank (4) extending from an opposing end of the drill bit (1). A plurality of flutes (5) are formed in the drill bit (1) and helically extend from adjacent the shank (4) into the cutting end part (2). Each flute (5) has a flute leading side wall (6) and a flute trailing side wall (7) and a land (9) defined between each of the flutes (5) and extending to the tapered cutting end part (2). Each land (9) has a leading land margin (10) defining a secondary cutting edge (11) with the flute trailing side wall (7) of a leading adjacent flute (5). Each land (9) also has a land relief (12) extending from the land margin (10) toward a trailing adjacent flute (5). Each land (9) still further has a land transition region (12) blending the land relief (12) into the flute leading side wall (6) of the trailing adjacent flute (5).
    Type: Application
    Filed: March 18, 2011
    Publication date: January 3, 2013
    Applicant: CPL Holdings Pty. Ltd.
    Inventor: Liam Patrick Ellis
  • Publication number: 20120309266
    Abstract: The present disclosure relates to apparatus for grinding rotary blades, in particular scythe-like blades or circular blades, in particular for machines for slicing food products. The apparatus includes at least one mount for a rotary blade to which the rotary blade can be attached and at least one grinding tool. The grinding tool and the rotary blade attached in the mount are movable relative to one another such that a blade edge extending at the periphery of the rotary blade can be ground by the grinding tool. The apparatus includes a measuring device for determining the extent of the blade edge and a control which is designed to use the determined blade edge extent for controlling the relative movement between the grinding tool and the rotary blade.
    Type: Application
    Filed: June 1, 2012
    Publication date: December 6, 2012
    Applicant: Weber Maschinenbau GmbH Breidenbach
    Inventors: Jens Schroeder, Sabine Spillner, Gerd Lischinski, Maik Herrmann, Thomas Lunow
  • Publication number: 20120295519
    Abstract: A method of making a cutting tap includes the steps of: grinding a blank to form a threaded body portion at an axially forward end of the cutting tap, grinding one or more flutes in the threaded body portion to form cutting edges; grinding the threaded body portion to form a first cutting thread and a second cutting thread, the first cutting thread at a first distance from the axially forward end of the cutting tap, and the second cutting thread at a second distance from the axially forward end of the cutting tap; and grinding a chamfer in the threaded body portion such that a thickness of a section of material removed from the second cutting thread is smaller than a thickness of a section of material removed from the first cutting thread during a tapping operation.
    Type: Application
    Filed: June 1, 2012
    Publication date: November 22, 2012
    Inventors: Willard E. Henderer, Stephen M. George, Vladimir D. Volokh
  • Patent number: 8260450
    Abstract: An eyeglass lens processing apparatus for forming a hole on an eyeglass lens to attach a rimless frame to the lens, includes: a lens chuck that holds the lens; a drilling tool; a designating unit that designates a position of a hole; a unit that measures or inputs an inclined angle of a refractive surface of the lens at the designated hole position; an arithmetic unit that obtains a hole angle with respect to a predetermined reference axis based on the inclined angle; a control unit that controls a positional relationship between the held lens and the drilling tool based on the obtained hole angle to perform a drilling; and an input unit that inputs a modified hole angle based on the obtained hole angle. The control unit controls the positional relationship between the held lens and the drilling tool based on the modified hole angle to perform a re-drilling.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: September 4, 2012
    Assignee: Nidek Co., Ltd.
    Inventor: Kyoji Takeichi
  • Publication number: 20120170985
    Abstract: A method of manufacturing a multi-tooth fir-tree or bulbous form milling cutter, by the grinding of a blank with a grinding wheel, wherein, a flat clearance angle ? of between 0° and 20° is generated on each tooth (13) by the path (14) of the grinding wheel (10), with each tooth (13) having a width (X) from tip to point of maximum clearance (see FIG. 5), calculated as follows: X={[(Rtan?)cos?]cos?}±0.25% (being calculation (A)) where R=radius of cutter, and where ?=clearance angle measured from a tangent to the tooth tip, and furthermore, wherein, each tooth (13) has a variable depth (Y) around the cutter, calculated as follows: Y={[?D]/[180/?]} 0.5±0.2. (being calculation (B)) where D=maximum diameter of the form at any given point along the form. The invention also includes fir tree and bulbous milling cutters produced by the above defined method.
    Type: Application
    Filed: September 21, 2010
    Publication date: July 5, 2012
    Inventors: Christopher Peter Ralph Hill, Mark Kirby
  • Publication number: 20120129434
    Abstract: A multi-axis computer controlled machine tool for relief grinding of single and multiple start threaded hobs (46). The machine comprises an angular oriented spindle (65) that can be angularly (swivel) positioned thereby providing the flexibility to utilize both cup-shaped grinding wheels (55) and pencil-shaped grinding wheels (52) for grinding of hob and milling cutter relieved tooth geometry without exchanging grinding spindles assemblies or modifying the machine construction to accommodate two types of grinding methods or utilizing an additional machine axis for the spindle re-orientation.
    Type: Application
    Filed: September 23, 2010
    Publication date: May 24, 2012
    Applicant: GLEASON CUTTING TOOLS CORPORATION
    Inventors: Roger L. Hackman, Wayne Martin, Mark A. Ritchie
  • Publication number: 20120045973
    Abstract: Methods for fabricating a honeycomb extrusion die from a die body include the step of machining extrusion slots with at least one grinding wheel to provide a honeycomb pattern of extrusion slots. In further examples, a plurality of the extrusion slots of the honeycomb pattern of extrusion slots can be machined with a wire electrical discharge machining process after machining the plurality of extrusion slots of the honeycomb pattern of extrusion slots with the grinding wheel.
    Type: Application
    Filed: February 23, 2011
    Publication date: February 23, 2012
    Inventors: David William Folmar, Aniello Mario Palumbo
  • Patent number: 8113916
    Abstract: The invention includes methods of manufacturing shafts to be used in medical devices. In particular, methods are disclosed to improve straightness and profile of wire used to form guidewires. The wire is preferably twist-straightened with a desired twist orientation, followed by grinding a desired profile on an apparatus having a spin configuration that is aligned in the same direction as the twist orientation.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: February 14, 2012
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Art Miller, Charles B. Sjostrom
  • Patent number: 8092610
    Abstract: Disclosed is a cleaning device for cleaning a driver used in a disk drive manufacturing process. The cleaning device includes: a body; a replaceable cleaning pad mounted in the body; and a cover mounted to the body over the cleaning pad, in which, the cover includes an opening to receive the driver and to expose a portion of the cleaning pad to receive and clean the driver. The cleaning device further includes a cleaning pad rotation mechanism mounted in the body that connects to the cleaning pad and rotates the cleaning pad. The cleaning pad rotation mechanism is configured to rotate the cleaning pad such that an unused portion of the cleaning pad is exposed to the opening for receipt of the driver and the cleaning pad rotation mechanism may be activated to rotate the cleaning pad.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: January 10, 2012
    Assignee: Western Digital Technologies, Inc.
    Inventor: Dean Albert Tarrant
  • Patent number: 7988528
    Abstract: An apparatus for grinding a threaded portion of a workpiece, is provided. The threaded portion has a spiral groove formed therein. The apparatus includes a motor, a grinding cord, a detector and a controller. The motor has a rotary portion for rotating the threaded portion of the workpiece about an axis. The grinding cord is configured for being looped around the threaded portion of the workpiece with a middle part thereof engagingly received in a given portion of turns of the spiral groove for grinding the thread portion of the workpiece. The detector is for detecting a rotating cycle of the rotary portion. The controller is communicatively coupled to the detector for controlling the rotary portion to selectively rotate in a first rotating direction or in a reverse second rotating direction based on the received signal from the detector.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: August 2, 2011
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Chia-Chun Chang
  • Publication number: 20110170973
    Abstract: The invention relates to a multi-blade solid carbide drill for cutting high-strength sandwich materials. The tool comprises a shaft section and an adjoining cutting part, into which a number of chip flutes that corresponds to the number of main blades is incorporated. In order to reinforce the curvature of the resulting chip, the chip flute of the drill comprises a chip flute rib in the region of the chip formation zone, said rib protruding from the chip flute surface and having a substantially wave-shaped cross-section (28), and said rib dividing the chip flute into two sections, a first chip flute section (30) forming the cutting rake and a second chip flute (32) forming the chip flute runout.
    Type: Application
    Filed: November 15, 2010
    Publication date: July 14, 2011
    Applicant: GUEHRING OHG
    Inventors: Ingo VON PUTTKAMER, Karl Trauner, Armin Helbig
  • Publication number: 20110171884
    Abstract: A device for sharpening a twist drill pointby means of a rotating grindstone (12) in a grinding machine comprises a base plate (14) lockably articulated around an axis parallel with the axis of the grindstone (12), a drill holder (16) for releasably holding a twist drill (1) to be sharpened, and a guide member (15). The guide member has a back plate (21) and a front plate (22), lockably rotatable in relation to each other. The back plate (21) is connected to the base plate (14) for movements in the direction of the grindstone axis, and the front plate (22) has guide means (28, 29) for slidably guiding the drill holder (16) in the general direction towards and away from the grindstone (12).
    Type: Application
    Filed: June 24, 2009
    Publication date: July 14, 2011
    Inventors: Torgny Jansson, Margereta Norin Jansson
  • Publication number: 20110097976
    Abstract: There is now provided a twist drill and a method for producing a twist drill which method includes forming a flute of a twist drill. The drill has drill material and a tip portion with a cutting lip. The drill has a land structure and a flute to remove chip residue. The land structure has a flute wall and a cutting edge structure that is disposed longitudinally along the flute wall. The cutting edge structure has a first portion at the drill tip portion and a second portion disposed away from the drill tip portion. The flute wall extends further into the land structure at the second portion of the cutting edge structure than at the tip portion to provide a greater amount of drill material at the tip portion than at the second portion of the cutting edge structure.
    Type: Application
    Filed: September 20, 2010
    Publication date: April 28, 2011
    Applicant: KENNAMETAL INC.
    Inventors: Dieter Mühlfriedel, Bernhard Borschert, Jürgen Schwägerl
  • Patent number: 7901271
    Abstract: A dual arbor chopper that is configured such that the knife blades of the chopper do not require shims after being sharpened. The arbors utilize a blade attachment recess that is oriented in an opposite direction as existing arbors used in choppers, in combination with a clamping block to provide support against the cutting force against the blade. An attachment fastener is provided to attach the clamping block and the knife blade to the arbor through an aperture provided in the clamping block and the knife blade. The cutting edge is positioned in the same location in the new and sharpened condition, thus eliminating the need for shims.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: March 8, 2011
    Inventor: John R. Buta
  • Patent number: 7896728
    Abstract: A tool for use in an abrasive machining process has a body extending along a central longitudinal axis from a first end to a tip end. An abrasive material is located on the tip end. The body has a tip end protuberance. An abrasive material is located on the protuberance. A body lateral surface has, over a radial span of at least 20% of a radius of the protuberance, a continuously concave longitudinal profile diverging tipward.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: March 1, 2011
    Assignee: United Technologies Corporation
    Inventors: Brian J. Schwartz, Daniel F. Grady, Robert E. Erickson
  • Publication number: 20110039478
    Abstract: A grinding composition for sharpening shredder blades of a shredder includes, based on total weight of the grinding composition, from 51 to 65 wt % of a grinding powder; from 5 to 35 wt % of a viscous grease agent; and from 3 to 30 wt % of at least one functional additive. A grinding sheet formed from the composition is used as a grinding product alone or in a bag. The composition is sealed in a bag and used as a grinding product. A process for manufacturing the latter grinding product employs an automatic form-fill-seal packaging machine. The shredder blades of a paper shredder are sharpened satisfactorily by the grinding composition as the grinding sheet or grinding product is shredded. The useful life of shredders is cost effectively extended while providing convenience in use that saves time and labor.
    Type: Application
    Filed: August 13, 2010
    Publication date: February 17, 2011
    Applicant: AURORA OFFICE EQUIPMENT CO., LTD. SHANGHAI
    Inventor: Xinxiong CHEN
  • Patent number: 7874895
    Abstract: The end mill grinding device of the present invention includes a tool spindle assembly, which enables multi-axis positioning of a rotating cutting tool being sharpened, and a motor tower, which enables multi-axis positioning of a grinding or cutting wheel for sharpening the end mill tool. The present invention combines linear sharpening and radial tool end grinding capability in the same machine element.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: January 25, 2011
    Inventor: Jeffrey Toycen
  • Publication number: 20100316456
    Abstract: A drill for making a hole within a workpiece has a body extending along a longitudinal axis, at least one flute extending along the body, and a drill point extending from the end of the body. The drill point has a periphery and is comprised of a chisel edge, a primary cutting edge extending inwardly from the periphery, a secondary cutting edge extending outwardly from the chisel edge, and a tertiary cutting edge connecting the primary cutting edge with the secondary cutting edge, wherein the tertiary cutting edge has a negative axial rake angle. A method for producing such a drill point is also disclosed wherein in one grinding pass a gash forms the axial rake angle of the secondary cutting edge, and in a separate grinding pass a portion of the secondary cutting edge is removed to produce a tertiary cutting edge having an axial rake angle that is negative.
    Type: Application
    Filed: June 16, 2009
    Publication date: December 16, 2010
    Applicant: Kennametal Inc.
    Inventor: Stephen Michael George
  • Patent number: 7832966
    Abstract: The present invention is directed to a helical drill configuration that allows substantially flat bottomed holes to be machined. At the cutting end of the body member, there are at least two cutting edges that are symmetrically oriented on opposing sides of the rotational axis of the drill. In an embodiment of the invention, first and second cutting edge portions form a continuous surface which provides strength and tool stability. The height of the second portions of each of the cutting edges remains relatively consistent along the horizontal for formation of a generally flat bottom hole. In the embodiment, a center point is defined by two sloped peak surfaces. A central straight chisel edge is formed by the intersection of the two sloped peak surfaces. The first cutting edge section extends from the chisel edge to the second cutting edge section. The first cutting edge section for both cutting edges is formed by symmetrically thinning the two peak surface.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: November 16, 2010
    Assignee: Kennametal Inc.
    Inventors: Michael D. Shultz, Stephen M. George, Raymond E. Moring, David L. Ford
  • Patent number: 7815512
    Abstract: A following margin of a following flank of an external thread is shifted more in a screw-rotation direction than a leading margin of a leading flank. Thus, during biting, the following margin bites first, thereby suppressing a force that pushes back a tap and reducing a tapping torque. Because margin portions can be disposed parallel to an axis of a thread forming tap, working is easy and manufacture can be performed inexpensively. When, in forming an external thread by grinding by a grinding abrasive, an inclination angle of the axis of a tap blank and an abrasive axis of the grinding abrasive is equal to a lead angle of the external thread, the margins are formed symmetrically across a root. On the other hand, if the inclination angle is made greater than the lead angle, the following margin can be shifted in the screw-rotation direction, enabling manufacture to be performed as easily and inexpensively as in a conventional case.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: October 19, 2010
    Assignee: OSG Corporation
    Inventors: Takayuki Nakajima, Kentarou Norimatsu
  • Publication number: 20100248594
    Abstract: A tool for setting the grind angle for sharpening jigs accurately and repeatably positions a movable support arm so that a consistent angle is ground into chisels regardless of the grinding wheel diameter and particular chisel.
    Type: Application
    Filed: February 18, 2010
    Publication date: September 30, 2010
    Inventor: Darrel Nish