With Cutting Edge Entirely Across End Of Tool (e.g., Router Bit, End Mill, Etc.) Patents (Class 407/54)
  • Patent number: 10369633
    Abstract: Cutting tool for machining by removal of matter from abrasive materials such as a material based on wood particles; tool characterized in that it is composed of a mounting endowed with at least one machining element, and of which at least the machining edge is composed of a high-homogeneity oxide ceramic platelet composed of Al2O3 and ZrO2, with this platelet being obtained from: a homogeneous Al2O3—XZrO mixture of Al2O3 nano-particles of average size smaller than 1 ?m, and ZrO2 nano-particles of tetragonal structure and average size smaller than that of the Al2O3 particles, with the ZrO2 content X being between 5 and 20% in mass of ZrO2 in relation to the total mass, with the mixture being formed into a plate via the gel-casting process followed by sintering or controlled cold isostatic compression, and with the plate (or platelets resulting from the division of the plate) being mechanically honed to produce the cutting edge.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: August 6, 2019
    Assignee: DIAMONDE
    Inventors: Timothée Grunder, Anne Piquerez
  • Patent number: 10343225
    Abstract: The invention is a monolithic end-mill cutter set (A) that can be made of ceramic and/or other materials having high strength and toughness and comprising a shank part (B) along a longitudinal axis (4) and a cutter part (C), comprising: a cutting diameter (1) varying between 2 to 20 mm, at least one web thickness (18) found at a blade (26) part, at least one helix angle (10) having a cutting edge (13) thereon, a core diameter (16) that is at least 0.7 times the cutting diameter (1), at least one corner radius (5) found at the tip part of the blades (26) between the flutes (9) and axial and positive radial rake angles (17) at which cutting operation is made. It has a wide helix angle interval and a positive rake angle. Titanium Aluminum Nitride TiAlN coating can be made on the monolithic end-mill cutter set (A) via PVD coating method in order to extend the service life of the end-mill cutter set (A), increase the abrasion resistance, and minimize the problem of sticking of rake on the cutter set (joining).
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: July 9, 2019
    Assignee: ALP HAVACILIK SANAYI VE TICARET ANONIM SIRKETI
    Inventors: Melike Sert Alagaç, Ugur Evrensel Yilmaz
  • Patent number: 10265784
    Abstract: [Object] To provide a ball end mill in which it is possible to improve wear resistance in the vicinity of the central axis at the tip of a ball-nosed end cutting edge and to suppress vibration of a tool body during machining. [Solution] A ball end mill 10 includes: a tool body 1 that rotates about a central axis O; and an arc-shaped ball-nosed end cutting edge 2 in a side view which is provided to start from the central axis O side on a tip side of the tool body 1 toward a rear side thereof. The ball-nosed end cutting edge 2 has a radius of curvature r that becomes gradually smaller from the central axis O side toward a periphery Q side.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: April 23, 2019
    Assignee: KYOCERA Corporation
    Inventor: Masahiko Kuroda
  • Patent number: 10252447
    Abstract: Provided are methods for heat curing of various materials, such as heat curable materials or more specifically potting compounds, which are disposed within cavities with limited access to these materials. Also provided are curing for executing such methods. In some embodiments, a heat curable material disposed within a cavity may be heated by a heating rod protruding into the cavity or through the cavity. The heating rod is thermally coupled to the heat curable material and is used to transfer heat to the heat curable material. For example, the heating rod may include a resistive heating element. The heating element may be positioned in such a way that the heat curable material is selectively heated within the cavity without significant heating of surrounding components. In some embodiments, the heating rod may be also used to compress the part containing the cavity or a stack including this part.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: April 9, 2019
    Assignee: The Boeing Company
    Inventors: William R. Ivy, Christopher R. Avery, Seth A. Berger
  • Patent number: 10183346
    Abstract: Provided is a rotary milling tool capable of finishing a milled surface to produce a smooth and glossy surface. A rotary milling tool in which a plurality of chip discharge grooves (2) are provided to the outer periphery of a tip part of a tool body (1), the plurality of chip discharge grooves (2) extending from the tool tip toward the tool base, and bottom blades (5, 6) are provided to an intersection ridge part at the intersection of a rake surface (3) of the chip discharge grooves (2) and a tip flank surface (4) of the tool body (1), each of the bottom blades (5, 6) being formed integrally with the tool body (1), wherein a convex edge (7) that is convex toward a tool-axis-direction tip is formed on at least one of the bottom blades (5, 6), and the convex edge (7) is formed by the connection of a plurality of linear edges that are substantially linear.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: January 22, 2019
    Assignee: UNION TOOL CO.
    Inventors: Shoichi Takahashi, Nozomu Sato
  • Patent number: 10160046
    Abstract: A multi-flute ball end mill of the present invention includes: a shank portion configured to rotate about a rotational axis; a cutting edge portion; three or more ball edges formed on the cutting edge portion; gashes formed between the ball edges; peripheral cutting edges continuous with end portions of the ball edges on the shank portion side; and flutes formed between the peripheral cutting edges continuously with the gashes. The degree of curvature of the ball edges is 35% to 55%. Each of the gashes includes four faces of a rake face of each of the ball edges, a gash wall face, a first gash face, and a second gash face. The second gash face is formed such that the closer the second gash face is to the rotation center point, the more inwardly the second gash face enters a second face of each of the ball edges.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: December 25, 2018
    Assignee: Mitsubishi Hitachi Tool Engineering, Ltd.
    Inventors: Shinjiroh Sakai, Mitsuhiro Yokokawa, Tomohiro Satou
  • Patent number: 10131003
    Abstract: A corner radius end mill includes a tooth adjacent a helically extending flute. The tooth includes axial and radial relief surfaces connected by a corner relief surface, as well as rake surface having a rake ridge. The rake ridge is continuously curved from a bisector line until at least an axial location rearward of the corner relief surface.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: November 20, 2018
    Assignee: Iscar, Ltd.
    Inventor: Leonid Shpigelman
  • Patent number: 9975187
    Abstract: Ceramic end mill with cutting edge portion including gashes between cutting edges and adjacent in a rotation direction. Center cut edges are formed at end cutting edges close to and facing rotation axis O. Center grooves are formed on rear sides of center cut edges and end cutting edges in the rotation direction continuous with a radial direction. The center grooves are continuous with positions where end cutting edge second surfaces face or approach rotation axis O. End cutting edge second surfaces are laid between center cut edges and end cutting edges. Center grooves are formed between end cutting edge second surfaces and center cut edges positioned on a rear side of end cutting edge second surfaces in the rotation direction. The center grooves pass on rotation axis O. Center grooves double as rake faces of the respective center cut edges and are continuous with the gashes.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: May 22, 2018
    Assignee: MITSUBISHI HITACHI TOOL ENGINEERING, LTD.
    Inventor: Kaname Suehara
  • Patent number: 9833845
    Abstract: An end mill body comprises: bottom blades formed at ridgelines where gashes and tip flank faces intersect, the gashes are formed at the tips of chip discharge grooves. At least one of the bottom blades serves as a long bottom blade that extends toward an inner peripheral side longer than the remaining bottom blades. The end mill body also has coolant holes formed between the chip discharge grooves. A coolant hole which is located between a chip discharge groove of a gash and a chip discharge groove located behind the chip discharge groove in a rotational direction is open to the tip clearance face of the long bottom blade. A coolant hole which is located between the chip discharge groove of the gash and a chip discharge groove located in front of the chip discharge groove in the rotational direction is open to the gash of the long bottom blade.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: December 5, 2017
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Koji Fukata, Takayuki Azegami
  • Patent number: 9826990
    Abstract: Disclosed is a reamer for implant surgery including: cutting front end portions each of which has a sharp front end; cut edges of a horizontal line form, the cutting front end portions and the cut edges being arranged radially and alternately, wherein one side of the cutting front end portion having the sharp front end has a triangular depressed face inclined downwardly toward a rotation central axis of the cutting part, and one side of the cut edge having the horizontal line form has a triangular inclined face inclined downwardly toward the outer circumferential surface of the cutting part, wherein an inclination angle of a side inclined edge inclined downwardly at the sides of the outer circumferences of the cutting front end portion and the cut edge becomes gradually smaller in the rotation direction of the cutting part.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: November 28, 2017
    Inventor: Sang-Hoon Ahn
  • Patent number: 9821383
    Abstract: A ball end mill, which includes long and short cutting edges alternately formed, shows excellent chip discharge performance without sacrificing strength. An even number of cutting edges are formed at intervals in a circumferential direction on a front end of an end mill body rotated about an axis and have rotation trajectories formed around the axis that form a hemispherical shape. The cutting edges adjacent to each other in the circumferential direction with one cutting edge interposed are long cutting edges that intersect with each other on the axis. The other cutting edges adjacent to each other in the circumferential direction with one cutting edge interposed are short cutting edges that include inner peripheral ends at positions distant from the axis. A gash of the long cutting edge and a gash of the short cutting edge connect with each other on a front end side of the end mill body.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: November 21, 2017
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Takayuki Azegami, Tarou Abe
  • Patent number: 9682433
    Abstract: A cutting insert mountable in an insert pocket of a milling cutter and capable of effectively absorbing a radially outward force during high speed machining and high ramp machining. The cutting insert has a top surface, a bottom surface, peripheral surfaces extending between the top and bottom surfaces, a mounting hole extending through the top surface and the bottom surface, a protrusion portion protruding from the bottom surface, and a pair of lower inclined abutment surfaces formed at opposite edges of the bottom surface. The lower inclined abutment surfaces are inclined in opposite directions toward a pair of opposing peripheral surfaces, outwardly and upwardly relative to the protrusion portion. The protrusion portion extends across the mounting hole and has a lateral surface facing radially outwardly of the milling cutter. The lateral surface selectively contacts or does not contact the insert pocket depending on a revolution speed of the milling cutter.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: June 20, 2017
    Assignee: TAEGUTEC LTD.
    Inventors: Chang Hee Choi, Su Jin Ryu
  • Patent number: 9545678
    Abstract: A cutting tool having particular usefulness in milling fall includes a plurality of flutes wherein each flute includes a plurality of reliefs spaced equidistant along a leading cutting wall or edge and a second plurality of reliefs spaced equidistant along a trailing cutting wall or edge and wherein the second plurality of reliefs are off set evenly from the first plurality of reliefs. The plurality of reliefs on a second flute are offset from the plurality of reliefs on a first flute by a distance equal to the equidistance of the plurality of reliefs divided by the total number of flutes.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: January 17, 2017
    Inventor: Stojan Stojanovski
  • Patent number: 9511426
    Abstract: Intersecting ridge lines of the top surface (2) and side surfaces (4a, 4b) of a cutting insert (1) have opposing first and second arcuate cutting edges (8, 10). One intersecting ridge line of the bottom surface (3) and side surface (4a) has a third arcuate cutting edge (9). The first and third cutting edges are on one side and the second cutting edge is on the other side with respect to the middle line. The length between the first and second cutting edges is greater than the length between the third cutting edge and the other intersecting ridge line (11). In a cross section perpendicular to the middle line, the angle formed by the top surface and a line connecting the first and third cutting edges is different from the angle formed by the top surface and a line connecting the second cutting edge and the ridge line (11).
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: December 6, 2016
    Assignee: Tungaloy Corporation
    Inventor: Kedar Suresh Bhagath
  • Patent number: 9481041
    Abstract: End mills are disclosed which may be made monolithically of ceramic or other materials. The cutting portions of the end mills have lengths of cut that are no more than twice their cutting diameters and cores which are at least 0.7 times their cutting diameters. Their axial blades have cutting edges with negative radial rake and are separated by helical flutes. Their cutting ends have negative axial rake and are gashed ahead of center and have radial cutting edges with negative rake. Such end mills also have radiused corners and gashes transitioning from radial to axial at a flute. Methods of milling materials using such ceramic end mills are also disclosed.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: November 1, 2016
    Assignee: KENNAMETAL INC
    Inventors: Danny Ray Davis, Sean Erin Landwehr, Russell Lee Yeckley
  • Patent number: 9352400
    Abstract: A shank cutter has plural circumferential cutting edges which run in a helical manner in the region of its cutting section and of which at least one critical number are equipped in each case with a preferably essentially flattened roughing profile with chip-separating grooves with rounded bases, so that the chip-separating grooves of cutter ridges which are adjacent in the circumferential direction are axially offset relative to each other. To create a tool which provides long service life by combined advantages of a vibration-stabilized finishing cutter and a conventional roughing cutter, at least one circumferential cutting edge has an angle of twist which differs from that of another circumferential cutting edge. In addition, the chip-separating grooves of the circumferential cutting edges which are equipped with a roughing profile in each case merge into a preferably essentially flattened central section of the roughing profile by means of a predefined flank radius.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: May 31, 2016
    Inventor: Martin Strasmann
  • Patent number: 9232953
    Abstract: A cutting tool for bone, cartilage, and disk removal includes a body with a first radial array of helical flutes formed along the body with a continuous radius in a first helical direction. The body has a second radial array of helical flutes formed along the body with a continuous radius in a second helical direction opposed to the first helical direction and intersecting the first array of helical flutes. Each helical flute forms a pair of spaced apart rake surfaces, which collectively perform a first and second cutting operations along a side of the body such that the intersecting rakes balance the cutting operation thereby minimizing axial loading of the cutting tool to permit bidirectional cutting while minimizing g inadvertent axial translation of the tool.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: January 12, 2016
    Inventor: Peter Bono
  • Patent number: 9227253
    Abstract: A rotary cutting tool. The tool has a body with outside diameter (OD), and outer surface, and a longitudinal axis, a plurality of flutes, helical in some embodiments. Flutes include a narrow leading edge land portion with circular segment profile and having flute cutting edge portions along a substantially uniform circumferential location, with an eccentric relief margin rotationally rearward of the narrow leading edge land portions. Face portions are provided with face cutting edge portions, and with a first dish portion adjacent each of the cutting edge portions sloping inwardly and downwardly generally toward a central longitudinal axis at a first dish angle alpha (?). Corner blend portions extend from flute cutting edge portions to the face cutting edge portions. Corner blend portions are provided in a variety of profiles, including an embodiment wherein the profile of the corner blend portions are truncated before the segment of curvature becomes tangential to the face cutting edge portions.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: January 5, 2016
    Inventors: Steven M. Swift, Luke Tyler Swift
  • Patent number: 9060827
    Abstract: A tool for drilling bone tissue, which has the advantage of having a cutting tip with a flat effective shape that prevents perforation of the Schneider membrane or injury to the dental nerve when drilling close to them. The tool is disposed along an longitudinal axis and includes a non-cutting main body, a narrowed area for retaining bone and a cutting tip, which includes cutting blades, each one of which is provided with a front cutting edge substantially perpendicular to the longitudinal axis and a substantially lateral cutting edge that forms an angle of between 0 and 10° with the longitudinal axis. Spaces for receiving bone are disposed between the cutting blades and are connected to the narrowed area.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: June 23, 2015
    Assignee: BIOTECHNOLOGY INSTITUTE, I MAS D, S.L.
    Inventor: Eduardo Anitua Aldecoa
  • Publication number: 20150147127
    Abstract: A rotary cutting tool, having a longitudinal axis, includes cutting and mounting portions. The cutting portion includes an end face surface and a peripheral surface extending therefrom. The peripheral surface includes respective pluralities of main and auxiliary flutes that extend helically with opposite hand about the longitudinal axis. The cutting portion includes a plurality of evenly circumferentially distributed end gashes and a plurality of end face cutting teeth. The number of main flutes and auxiliary flutes are different, each being wholly divisible by, and greater than, the number of end face cutting teeth. In each cross sectional view of the cutting portion an imaginary contour line defined by a peripheral contour of the peripheral surface of one of the end face cutting teeth is in rotationally aligned relationship, about the longitudinal axis, with the peripheral contour of the peripheral surfaces of all other end face cutting teeth.
    Type: Application
    Filed: November 27, 2013
    Publication date: May 28, 2015
    Applicant: Iscar, Ltd.
    Inventors: Leonid Shpigelman, Igor Segal
  • Publication number: 20150078841
    Abstract: A milling cutter with at least one peripheral cutting edge 4 disposed on its periphery, the peripheral cutting edge 4 being configured as a profile of spaced-apart teeth 7 that forms a so-called “cord”; wherein each of the teeth 7—looking from the flute in a direction opposite to the cutting direction onto the cutting edge portion—forms a cutting edge portion SK composed of several different radii, i.e. of at least one larger radius R1 forming the predominant part of the cutting edge portion of the respective tooth 7 and a smaller radius R2, which is preferably immediately adjacent thereto on both sides.
    Type: Application
    Filed: September 16, 2014
    Publication date: March 19, 2015
    Inventors: Franz-Josef Haimer, Reinhold Sanhieter
  • 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: 20150063928
    Abstract: Provided are: an exchangeable tip cutting tool in which breakage of the threaded section and breakage of the thread ridges during installation of the machining head and under increased cutting load during cutting are limited and which is capable of performing machining with high efficiency; and a machining head and a holder to be used in the exchangeable tip cutting tool. The flank angle (?) of the pressure flank (11) is set to be larger than the flank angle (?) of the clearance flank (12); and a holder (2, 2a) having a female threaded fastening section (8) wherein the angle of the screwing surface of the pressure flank is set to be larger than the angle of the screwing surface of the clearance flank.
    Type: Application
    Filed: March 27, 2013
    Publication date: March 5, 2015
    Inventors: Katsutoshi Maeda, Makoto Baba
  • Publication number: 20150056027
    Abstract: A ball end mill, which includes long and short cutting edges alternately formed, shows excellent chip discharge performance without sacrificing strength. An even number of cutting edges are formed at intervals in a circumferential direction on a front end of an end mill body rotated about an axis and have rotation trajectories formed around the axis that form a hemispherical shape. The cutting edges adjacent to each other in the circumferential direction with one cutting edge interposed are long cutting edges that intersect with each other on the axis. The other cutting edges adjacent to each other in the circumferential direction with one cutting edge interposed are short cutting edges that include inner peripheral ends at positions distant from the axis. A gash of the long cutting edge and a gash of the short cutting edge connect with each other on a front end side of the end mill body.
    Type: Application
    Filed: March 13, 2013
    Publication date: February 26, 2015
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Takayuki Azegami, Tarou Abe
  • Publication number: 20150056463
    Abstract: A method for manufacturing a cemented carbide body includes the steps of forming a first part of a first powder composition comprising a first carbide and a first binder phase, sintering the first part to full density in a first sintering operation, forming a second part of a second powder composition comprising a second carbide and a second binder phase, sintering the second part to full density in a second sintering operation, bringing a first surface of the first part and a second surface of the second part in contact, and joining the first and second surface in a heat treatment operation.
    Type: Application
    Filed: March 26, 2013
    Publication date: February 26, 2015
    Inventors: Bo Jansson, Per Jonsson, Tomas Persson
  • Patent number: 8961078
    Abstract: To provide a rotary cutting tool in which a satisfactory cut state in which burrs and uncut portions are absent is obtained, even when counterboring is applied to a composite honeycomb member.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: February 24, 2015
    Assignee: Union Tool Co.
    Inventors: Shoichi Takahashi, Masanori Kakuda
  • Patent number: 8961077
    Abstract: A tool for both severing the end of a pipe and beveling the cut end includes a spiral cutting mill having an elongate end received in the bore of a frustoconical shell cutter. The shell cutter is locked for rotation with the cutting mill such that a single tool has two cutting surfaces, one for severing a length of pipe and one for beveling the outer edge thereof.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: February 24, 2015
    Assignee: Illlinois Tool Works Inc.
    Inventor: Jeffrey Swiatowy
  • Publication number: 20150050095
    Abstract: A milling and boring tool with a tool shaft which comprises a center axis, at least one geometrically defined rough cutter and at least one geometrically defined finishing cutter, and the at least one rough cutter and the at least one finishing cutter respectively comprise a chip groove. The milling and boring tool is characterized in that the chip groove of the at least one finish machining cutter has an opposite twist than the chip groove of the at least one rough cutter.
    Type: Application
    Filed: March 20, 2013
    Publication date: February 19, 2015
    Applicant: Mapal Fabrik für Präzisionswerkzeuge Dr. Kress KG
    Inventor: Ulrich Krenzer
  • Publication number: 20150043980
    Abstract: A ball end mill comprises a gash provided at a front end portion of a main end mill body rotated about an axis; and at least one cutting edge which has a rotational trajectory around the axis that forms a convex hemispherical shape having a center on the axis. The cutting edge is formed at a peripheral edge portion of a wall surface of the gash. A difference between a first and second included angles is within ±7°, where the first included angle is formed between the axis and a straight line connecting the center with a cutting edge position at which a depth of the gash is maximal in a cross-section orthogonal to the cutting edge, and the second included angle is formed between the axis and a straight line connecting the center with a cutting edge position at which a rake angle of the cutting edge is maximal.
    Type: Application
    Filed: March 13, 2013
    Publication date: February 12, 2015
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Genki Matsumoto, Takayuki Azegami
  • Patent number: 8939682
    Abstract: A rotary cutting tool or end mill is provided, the tool comprising a plurality of pairs of diametrically-opposed, symmetrical, helical flutes formed in a cutting portion of the tool body, wherein the pitch between at least one pair of adjacent helical flutes is less than or greater than the pitch of at least one other pair of adjacent helical flutes in at least one radial plane along the axial length of the flutes, a plurality of peripheral cutting edges, wherein at least one of the peripheral cutting edges has a radial rake angle different from radial rake angle of a peripheral cutting edge of a different helical flute.
    Type: Grant
    Filed: March 19, 2013
    Date of Patent: January 27, 2015
    Assignee: SGS Tool Company
    Inventors: Jason W. Wells, Paul S. Daniels, Douglas P. Bonfiglio, Jeffery L. Burton
  • Publication number: 20140369773
    Abstract: A cutting tool, such as a milling cutter, includes a tool body and a plurality of pockets for receiving cutting inserts. Each pocket includes a bottom support surface, an radial support surface, an axial support surface, a first corner relief between the bottom support surface and the radial support surface, and a first stress relief formed in the first corner relief at one end of the pocket. The first stress relief is formed at an angle with respect to a plane parallel to the radial support surface. The first stress relief reduces a tensile stress of the cutting tool during a machining operation. A second and third stress relief may be formed in the first corner relief and/or in a second corner relief.
    Type: Application
    Filed: June 13, 2013
    Publication date: December 18, 2014
    Applicant: Kennametal Inc.
    Inventors: James Michael Waggle, Ronald Louis Dudzinsky
  • Publication number: 20140356081
    Abstract: A rotary cutting tool with a longitudinal axis includes a shank portion, a cutting portion, and a cutting tip. The cutting portion includes a plurality of blades and a plurality of flutes. Each blade includes a leading face, a trailing face, and a land surface extending between the leading face and the trailing face. The cutting tip includes a corner radius, a first portion formed with a first dish angle, and second portion formed with a second dish angle and a third portion formed with a third dish angle. The trailing face contacts the work during a ramp operation in such a way that the first, second and third portions have a double positive geometry to provide the cutting tool with high ramp angle capability.
    Type: Application
    Filed: May 30, 2013
    Publication date: December 4, 2014
    Applicant: Kennametal Inc.
    Inventor: Danny Ray Davis
  • Publication number: 20140356083
    Abstract: A rotary cutting tool, having a longitudinal axis, includes a forward cutting portion and a rearward shank portion. The cutting portion includes a peripheral surface that has a plurality of flutes recessed therein. The plurality of flutes extend helically along the longitudinal axis and form a plurality of cutting teeth. Each cutting tooth includes a cutting edge at a rotationally leading edge thereof and a chip-splitting arrangement located at the cutting edge. Each chip-splitting arrangement includes two grooves. The two grooves interrupt the cutting edge and diverge, relative to each other, therefrom in the peripheral surface on opposite sides of an associated plane that is oriented perpendicularly to the longitudinal axis.
    Type: Application
    Filed: May 28, 2013
    Publication date: December 4, 2014
    Applicant: Iscar, Ltd.
    Inventor: Eliyahu Budda
  • Publication number: 20140341662
    Abstract: [Object] To provide a radius end mill has a good cutting sharpness, and improves a surface roughness on the machined surface. [Solution] A radius end mill 20 includes a corner R cutting edge 3 which extends between the end cutting edge 2 and the outer peripheral cutting edge 4; and a corner gash 8 disposed adjacent to the corner R cutting edge 3 of the rake face 6, wherein the corner gash 8 in a planar shape has an edge, part of which is located at the center portion of the corner R cutting edge 3, and an axial rake 2 at an end portion on the side of the end cutting edge 2 which is in contact with the corner gash 8 on the corner R cutting edge 3 is in the range of 5 to 20 degrees.
    Type: Application
    Filed: December 26, 2012
    Publication date: November 20, 2014
    Applicant: Kyocera Corporation
    Inventor: Tsutomu Yamayose
  • Patent number: 8870498
    Abstract: A ball end mill in which a ball end cutting edge (3) has a convex shape in a tool rotation direction with respect to a line connecting a rotation center (O) and a radially outer end (3o) of the ball end cutting edge (3), in a front view of the tool. In the ball end mill, a rake angle (?) of each portion of the ball end cutting edge (3) is set in a range from ?10° to 0°, and the negative value of the rake angle (?) is increased from a tip of the ball end cutting edge (3) and a radially outer end (3o) of the ball end cutting edge (3) toward a middle point in the radial direction, and is maximized at approximately the middle point in the radial direction.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: October 28, 2014
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Kazuo Maeda, Kouji Tominaga
  • Patent number: 8858128
    Abstract: A corner radius end mill includes a blended gash extending along a cutting edge. The blended gash is formed in a corner sector of the end mill. The corner sector has a first half-sector and a second half-sector defined on opposite sides of an imaginary bisection line of the corner sector, the first and second half-sectors subtending equal angles about the imaginary bisection line. The blended gash extends from a first extremity located in the second half-sector in a direction away from the first half-sector. The blended gash blends an end gash surface and flute rake surface of the corner radius end mill.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: October 14, 2014
    Assignee: Iscar, Ltd.
    Inventors: Eliyahu Budda, Alexander Khina
  • Patent number: 8845241
    Abstract: A radius end mill including an end mill body which is rotated around an axis thereof; a chip discharge flute being provided at an outer periphery of a tip portion of the end mill body; a gash being provided at a tip portion of the chip discharge flute; a rake face being formed on a wall face facing an end-mill rotational direction in the chip discharge flute or the gash; a cutting edge being formed on the rake face; the cutting edge including an end cutting edge, an outer peripheral cutting edge, and a convex circular-arc-shaped corner cutting edge; the end cutting edge being formed at a side ridge portion on the tip portion of the rake face; the outer peripheral cutting edge being formed at a side ridge portion on the outer peripheral side of the rake face; the convex circular-arc-shaped corner cutting edge being formed at a corner side ridge portion formed by the end cutting edge and the outer peripheral cutting edge; wherein the corner cutting edge has a positive cutting edge inclination angle; and the por
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: September 30, 2014
    Assignee: Mitsubishi Materials Corporation
    Inventor: Taro Abe
  • Publication number: 20140255113
    Abstract: End mills are disclosed which may be made monolithically of ceramic or other materials. The cutting portions of the end mills have lengths of cut that are no more than twice their cutting diameters and cores which are at least 0.7 times their cutting diameters. Their axial blades have cutting edges with negative radial rake and are separated by helical flutes. Their cutting ends have negative axial rake and are gashed ahead of center and have radial cutting edges with negative rake. Such end mills also have radiused corners and gashes transitioning from radial to axial at a flute. Methods of milling materials using such ceramic end mills are also disclosed.
    Type: Application
    Filed: February 6, 2014
    Publication date: September 11, 2014
    Applicant: Kennametal Inc.
    Inventors: Danny Ray Davis, Sean Erin Landwehr, Russell Lee Yeckley
  • Patent number: 8827601
    Abstract: An end mill comprising: an odd number of five or more outer peripheral cutting edges formed around a front end portion of the end mill body, the outer peripheral cutting edges being twisted about the axis to a rearward side of a rotational direction of the end mill from a front end of the end mill body toward a rear end side thereof and being arranged at intervals in a circumferential direction; and bottom cutting edges which are formed at the front end of the end mill body so as to respectively extend from tips of the outer peripheral cutting edges toward the axis, and wherein the outer peripheral cutting edges have different helix angles with respect to the axis between the outer peripheral cutting edges adjacent to each other in the circumferential direction.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: September 9, 2014
    Assignee: Mitsubishi Materials Corporation
    Inventor: Kazunori Haraguchi
  • Patent number: 8813353
    Abstract: A dielectric structure including a metal foil, a dielectric layer and a conductor layer provided in this order, wherein the metal foil has a thickness of from 10 to 40 ?m, the dielectric layer has a thickness of from 0.3 to 5 ?m, and the conductor layer has a thickness of from 0.3 to 10 ?m. The dielectric structure has plural vias which are separated from each other, and which penetrate through both of the dielectric layer and the conductor layer. The vias of the dielectric layer have different diameters which are in a range of from 100 to 300 ?m, a diameter of each of the vias of the conductor layer is larger than a diameter of a corresponding via of the dielectric layer by 5 to 50 ?m, and a minimum via pitch is from 100 to 350 ?m.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: August 26, 2014
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Yasuhiko Inui, Takamichi Ogawa, Seiji Ichiyanagi, Jun Otsuka, Manabu Sato
  • Patent number: 8807882
    Abstract: A face milling cutter has a shank portion adjoining a cutting portion. The cutting portion terminates in a plurality of cutting edges extending in a radial direction from a central axis of the face milling cutter. The cutting edges are convexly curved at least along a part of their length. A portion of the cutting edges proximate the central axis is nearer in an axial direction to the shank portion than a point, X, on the cutting edges that is farthest away from the shank portion. A distance Y, between the point, X, and the central axis is between 20% and 40% of a diameter, D, of the face milling cutter, and a central portion extends the distance, Y, and has a radius of curvature of about 110% of the diameter, D.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: August 19, 2014
    Assignee: Hanita Metal Works, Ltd.
    Inventors: Vladimir Volokh, Sergei Boulakhov, Shay Zeidner, Leonid Sharivker
  • Publication number: 20140227050
    Abstract: An end mill for machining titanium includes a cutting portion having blunt cutting edges alternated with flutes. Each flute includes, in order from the cutting edge, a rake surface, a concavely shaped bending portion, a convexly shaped ejecting portion and a tooth relief edge. The convexly shaped ejecting portion has an ejection height E, which is measurable between an apex of the ejecting portion to an imaginary straight line extending from a nadir of the adjacent bending portion of the flute to the adjacent tooth relief edge. In a plane perpendicular to a rotation axis of the end mill, the ejection height E and a cutting portion diameter DE, fulfill the condition 0.010DE<E<0.031DE.
    Type: Application
    Filed: February 13, 2013
    Publication date: August 14, 2014
    Applicant: Iscar, Ltd.
    Inventors: Eliyahu Budda, Alexander KHINA, Gabby ZEHAVI
  • Publication number: 20140227049
    Abstract: An end mill for machining titanium includes a cutting portion having blunt teeth alternated with flutes. Each flute includes, in order from the cutting edge, a rake surface, a concavely shaped bending portion, a convexly shaped ejecting portion and a tooth relief edge. The convexly shaped ejecting portion has an ejection height E, which is measurable between an apex of the ejecting portion to an imaginary straight line extending from a nadir of the adjacent bending portion of the flute to the adjacent tooth relief edge. In a plane perpendicular to a rotation axis of the end mill, the ejection height E and a cutting portion diameter DE, fulfill the condition 0.010DE<E<0.031DE.
    Type: Application
    Filed: February 13, 2013
    Publication date: August 14, 2014
    Applicant: Iscar, Ltd.
    Inventors: Eliyahu Budda, Alexander Khina, Gabby Zehavi
  • Publication number: 20140212230
    Abstract: To provide a tool that can reduce the maximum value of cutting resistance when adjacent peripheral edges cut a workpiece simultaneously. A lead L of a spiral flute 21, a waveform pitch P, the number of edges N of peripheral edges 22, and a natural number m are set to satisfy L/N=m×P?P/N±P/2 or L/N=m×P+P/N±P/2, the waveforms of adjacent ones of the peripheral edges 22 at the positions where they contact a workpiece simultaneously are in an anti-phase relationship when the adjacent peripheral edges 22 cut the workpiece simultaneously. Therefore, there is an effect that the length of the cutting edges that contact the workpiece simultaneously is shortened to reduce the maximum value of cutting resistance.
    Type: Application
    Filed: October 6, 2011
    Publication date: July 31, 2014
    Inventors: Hideaki Imaizumi, Tetsuya Adachi
  • Publication number: 20140205390
    Abstract: A multi-flute endmill including a cutting edge part having multiple cutting edges and flutes formed between adjacent cutting edges in a rotation direction around the tool axis O. A rake face of each cutting edge is formed from a rake face of an end cutting edge from the tool axis O side to the outer peripheral side of a shank, an adjacent rake face of a corner R edge that forms a surface different from the rake face of the end cutting edge, and an adjacent rake face of a peripheral cutting edge that forms a surface different from the rake face of the corner R edge. A gash is formed between the rake face of the end cutting edge and a flank of an end cutting edge that is adjacent on a forward side thereof in the rotation direction R.
    Type: Application
    Filed: December 27, 2011
    Publication date: July 24, 2014
    Applicant: Hitachi Tool Engineering, Ltd.
    Inventors: Makoto Baba, Jun-ichi Hirai
  • Publication number: 20140161546
    Abstract: An end mill having a plurality of teeth configured for both roughing and semi-finishing applications, the teeth being alternated with a plurality of flutes. At least one tooth of the plurality of cutting teeth is a serrated tooth formed with serrations along a relief surface thereof and at least one other tooth is free of serrations. Each tooth of the plurality of cutting teeth includes an actual internal cutting angle formed at an intersection of a rake cutting sub-surface and a relief surface. The actual internal cutting angle of each tooth has a greater value than an imaginary internal cutting angle formed at an intersection of imaginary extension lines of a rake recessed sub-surface and a relief surface of the same tooth.
    Type: Application
    Filed: December 11, 2012
    Publication date: June 12, 2014
    Applicant: Iscar, Ltd.
    Inventors: Leonid Shpigelman, Eliyahu Budda, Alexander Khina
  • Publication number: 20140133926
    Abstract: A corner radius end mill includes a blended gash extending along a cutting edge. The blended gash is formed in a corner sector of the end mill. The corner sector has a first half-sector and a second half-sector defined on opposite sides of an imaginary bisection line of the corner sector, the first and second half-sectors subtending equal angles about the imaginary bisection line. The blended gash extends from a first extremity located in the second half-sector in a direction away from the first half-sector. The blended gash blends an end gash surface and flute rake surface of the corner radius end mill.
    Type: Application
    Filed: November 14, 2012
    Publication date: May 15, 2014
    Applicant: Iscar, Ltd.
    Inventors: Eliyahu Budda, Alexander Khina
  • Publication number: 20140126968
    Abstract: A milling tool (21) includes a tool body (23) having a longitudinal axis (A) and a first end (25), a plurality of flutes (27) provided in the tool body (23) and extending to the first end (25) of the tool body (23), and a plurality of cutting edges (29r, 29u), each cutting edge being associated with a respective one of the plurality of flutes (27), each cutting edge being substantially identical to each other one of the plurality of cutting edges except that at least one but not all of the cutting edges is a recessed cutting edge (29r) and at least one but not all of the cutting edges is a non-recessed cutting edge (29u), each recessed cutting edge (29r) beginning at a non-zero distance from the first end (25) of the tool body (23) and each non-recessed cutting edge (29u) extending to the first end (25) of the tool body (23).
    Type: Application
    Filed: June 27, 2012
    Publication date: May 8, 2014
    Applicant: SECO TOOLS AB
    Inventor: Wilco Van Den Boogard
  • Publication number: 20140126967
    Abstract: A rotary cutting tool or end mill is provided, the tool comprising a plurality of pairs of diametrically-opposed, symmetrical, helical flutes formed in a cutting portion of the tool body, wherein the pitch between at least one pair of adjacent helical flutes is less than or greater than the pitch of at least one other pair of adjacent helical flutes in at least one radial plane along the axial length of the flutes, a plurality of peripheral cutting edges, wherein at least one of the peripheral cutting edges has a radial rake angle different from radial rake angle of a peripheral cutting edge of a different helical flute.
    Type: Application
    Filed: March 19, 2013
    Publication date: May 8, 2014
    Applicant: SGS TOOL COMPANY
    Inventors: Jason W. WELLS, Paul S. DANIELS, Douglas P. BONFIGLIO, Jeffery L. BURTON
  • Patent number: 8714890
    Abstract: Embodiments of the disclosure provide a drill bit including a drill bit body having a central axis. A first cutting edge is disposed on the drill bit body at a first radial distance from the central axis as measured within a plane normal to the central axis. And a second cutting edge is disposed on the drill bit body at a second radial distance from the central axis as measured from within the plane. The first radial distance is less than the second radial distance.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: May 6, 2014
    Assignee: The Boeing Company
    Inventors: Angelica Davancens, Eric Whinnem