Rectilinear Broach Patents (Class 407/13)
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Patent number: 11141803Abstract: This broach includes a broach body having a shaft shape and a cutting edge section in which cutting edges protrude and are arranged in a longitudinal direction on an outer circumference of the broach body. The cutting edge section includes, in the order from a front side of the broach body, an circumference cutting section in which an outer diameter of each of the cutting edges sequentially increases rearward, and a tooth thickness cutting section in which a thickness of each of the cutting edges sequentially increases from the cutting edges at a rear end of the circumference cutting section toward the rear side. At least a rear end portion of the circumference cutting section is a high-feed cutting section in which the cutting depth per cutting edge is set in a range of 0.15 mm or more and 0.30 mm or less.Type: GrantFiled: May 10, 2017Date of Patent: October 12, 2021Assignees: MITSUBISHI MATERIALS CORPORATION, TOYOTA MOTOR HOKKAIDO, INC.Inventors: You Tanaka, Kensuke Kohno, Toru Yamazaki
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Publication number: 20140294521Abstract: A plurality of cutting edges that are arranged on an outer circumference of a shaft-shaped broach body are provided with a spline teeth group, which contains a plurality of spline teeth 8 that groove a prepared hole of a work material, and a round teeth group, which is disposed in a different position from the spline teeth group along an axis direction and contains a plurality of round teeth that machine an inner circumference of the prepared hole. At least one gullet is formed to extend along the outer circumference of the broach body in a circumferential direction around the axis between the round teeth that are adjacent to one another in the axis direction in the round teeth group. The gullet extends toward the axis direction, gradually twisting toward the circumferential direction. The spline teeth group and the round teeth group are formed integrally on the outer circumference of the broach body.Type: ApplicationFiled: March 27, 2014Publication date: October 2, 2014Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Naoki Yoshizumi, Yoshio Kobayashi, Kensuke Kohno
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Publication number: 20140255112Abstract: A broach tool includes a broach tool rake face with a tailored surface topography.Type: ApplicationFiled: March 7, 2014Publication date: September 11, 2014Applicant: United Technologies CorporationInventors: Tahany I. El-Wardany, Wayde R. Schmidt
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Patent number: 8640335Abstract: A broaching apparatus (200, 400) includes; a broach (300, 600) having a cross-section corresponding to a geometry of slot (115) between adjacent steeples (110) of a turbine rotor (100), and a mechanism (210, 220, 230, 410, 420, 430) which moves the broach (300,600) through the slot (115) in a direction substantially parallel to a direction of extension of the slot (115).Type: GrantFiled: August 13, 2009Date of Patent: February 4, 2014Assignee: Alstom Technology Ltd.Inventor: Matthew S. Kight
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Patent number: 8485762Abstract: An internal broaching tool for broaching profiles delimited by a root and flanks in one aspect arranges a relief part between the toothed part and the calibration part. The calibrating broaching teeth in adjacent rows on the calibration part have a guiding flank (without a clearance angle or with a maximum negative clearance angle of 0.1°) and a cutting flank (with a positive clearance angle). The guiding flanks and the cutting flanks on the calibrating broaching teeth located behind each other in the direction opposite the broaching direction are alternately offset relative to each other in adjacent rows. The position, shape, and size of each guiding flank located downstream in relation to the direction opposite the broaching direction are associated with the position, shape, and size of the associated cutting flank (or the flank of the broaching tooth) in the preceding row.Type: GrantFiled: October 17, 2009Date of Patent: July 16, 2013Assignee: Spezial Werkzeuge GmbH Zella-MehlisInventors: Juergen Kuehner, Ernst Hettmann
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Publication number: 20130156513Abstract: This helical broach forms a twisted groove at the inner circumference of a machined hole of a workpiece by a plurality of cutting teeth, the plurality of cutting teeth include a plurality of circumference cutting teeth which are arranged on the tip-end side of the broach body, and include a plurality of tooth thickness cutting teeth which are arranged on the rear-end side of the broach body. The plurality of tooth thickness cutting teeth include cutting edges and guiding edges, respectively. The tooth thickness cutting tooth positioned closest to the rear-end side of the broach body is provided with the guiding edge instead of the cutting edge at the intersecting ridge part between a rake face and a lateral surface facing one wall surface of both groove wall surfaces of the twisted groove of the workpiece.Type: ApplicationFiled: August 26, 2011Publication date: June 20, 2013Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Naoki Yoshizumi, Yoshio Kobayashi, Kensuke Kohno, Hideyuki Fujiwara
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Publication number: 20130156514Abstract: A push broach, for machining a quadrilateral hole or quadrilateral groove, includes a shank portion and a cutting portion connected to the shank portion. The cutting portion includes at least one pair of cutting teeth including a first cutting tooth and a second cutting tooth arranged substantially parallel to the first cutting tooth, the first cutting tooth includes a pair of first cutting edges at two opposite edges thereof, the second cutting tooth includes a pair of cutting edges at two opposite edges thereof, when viewed from an end of the shank portion, each second cutting edge interconnects the pair of first cutting edge, and the pair of the first cutting edges and the pair of second cutting edges cooperatively form a quadrangle enclosing a periphery of the first cutting tooth.Type: ApplicationFiled: December 7, 2012Publication date: June 20, 2013Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.Inventors: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., HON HAI PRECISION INDUSTRY CO., LTD.
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Patent number: 8434972Abstract: The invention relates to a broaching tool, in particular a keyway broaching tool, comprising a holder which defines a longitudinal axis and has a shank, extending in the longitudinal direction, as support for a cutting body which can be fixed in a seat of the shank by means of a clamping device. The seat has a passage which is at a distance from the free end of the shank and extends transversely to the longitudinal axis and the inside of which forms guide surfaces for bearing surfaces of the cutting body, which can be inserted into the passage in an insertion direction. An end-position limit for the inserted cutting body is formed on guide surfaces and on associated bearing surfaces. The clamping device produces a force component on the cutting body which presses the latter against the end-position limit.Type: GrantFiled: February 13, 2008Date of Patent: May 7, 2013Assignee: Hartmetall-Werkzeugfabrik Paul Horn GmbHInventor: Hans Schaefer
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Publication number: 20120195699Abstract: A broaching apparatus includes a first tooth having a front face, a rear face opposite the front face, and a first cutting surface have a lobed shape extending along a first side of the first tooth between the front face and the rear face. A first interface defined between the first cutting surface and the front face is offset relative to a second interface defined between the first cutting surface and the rear face in a direction that is substantially perpendicular to an axis of tooth movement for broaching operations to provide tool clearance rearward from the first interface. A method of making a broach cutter is further provided.Type: ApplicationFiled: February 1, 2011Publication date: August 2, 2012Applicant: UNITED TECHNOLOGIES CORPORATIONInventors: James D. Campbell, JR., Matthew C. Gartland, Barclay Bingham Young, JR., Szymon Kuskowski
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Patent number: 8070396Abstract: A broach tool and a broach insert for chip removing machining of metals are provided. The broach tool includes an elongate holder and at least one cutting unit. The holder comprises at least one recess for the receipt of the cutting unit. The broach tool has a feeding direction. The broach tool includes clamping members for each cutting unit. Each clamping member is arranged in front of the cutting unit in the feeding direction. The cutting unit is a replaceable broach insert including a base part and a cutting part. A notch is formed centrally in a rear side surface of the broach insert. The recess includes a rear wall formed with a projection, the cross section of which is U-shaped and includes arms. The arms are arranged to be elastically deformed by the notch.Type: GrantFiled: September 13, 2006Date of Patent: December 6, 2011Assignee: Seco Tools ABInventors: Jorma Koskinen, Jorgen Borgstrom, Pajazit Avdovic
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Publication number: 20110020078Abstract: A helical broach 1 for roughing includes a cutting tooth part 30 in which n spline teeth 31 are arranged side by side in an axial direction. The spline teeth 31 each include cutting teeth 32 which are arranged at a predetermined helix angle. The cutting teeth 32 each have an acute angle portion and an obtuse angle portion on both sides thereof in a circumferential direction. The cutting teeth disposed on the first to n?1th spline teeth 31 (S1 to Sn?1) in the circumferential direction are each formed in such a way that its height on the acute angle portion side differs from that on the obtuse angle portion side. The cutting teeth (Sn) of the nth spline tooth (Sn) are each formed in such a way that its height stays constant in the circumferential direction.Type: ApplicationFiled: September 10, 2009Publication date: January 27, 2011Applicant: Mitsubishi Heavy Industries LtdInventor: Yasuhito Katsuki
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Patent number: 7805824Abstract: A machining system includes a support configured to retain an article, such as a rotor disk, having an area, such as a surface of a slot in the disk. A cutting tool, for example, a broach, is movable relative to the support to cut the area. A heating member, such as a laser, is configured to locally heat the area of the article. In one example, the cutting tool includes a body having a cutting edge. The heating member is supported by the body and is configured to provide heat adjacent to the cutting edge. The cutting edge cuts the locally heated area while the area is still heated.Type: GrantFiled: May 13, 2010Date of Patent: October 5, 2010Assignee: United Technologies CorporationInventors: Tahany Ibrahim El-Wardany, Sergei F. Burlatsky, Changsheng Guo, Wayde R. Schmidt
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Publication number: 20100218657Abstract: A machining system includes a support configured to retain an article, such as a rotor disk, having an area, such as a surface of a slot in the disk. A cutting tool, for example, a broach, is movable relative to the support to cut the area. A heating member, such as a laser, is configured to locally heat the area of the article. In one example, the cutting tool includes a body having a cutting edge. The heating member is supported by the body and is configured to provide heat adjacent to the cutting edge. The cutting edge cuts the locally heated area while the area is still heated.Type: ApplicationFiled: May 13, 2010Publication date: September 2, 2010Inventors: Tahany Ibrahim El-Wardany, Sergei F. Burlatsky, Changsheng Guo, Wayde R. Schmidt
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Patent number: 7578638Abstract: A cutting tool including a basic body and a plurality of cutting inserts arranged in series one after the other. Each insert includes a topside, an underside, two opposite side surfaces, front and rear ends, and a cutting edge adjacent to the front end. The rear end of a first cutting insert faces the front end of a second cutting insert disposed rearward of the first insert, and a chip space forward of the cutting edge of the second cutting insert is delimited by a chip-forming surface extending in the forward direction from the rear end of the first cutting insert, and a chip-forming surface extending downward from the cutting edge of the second cutting insert.Type: GrantFiled: July 6, 2007Date of Patent: August 25, 2009Assignee: Sandvik Intellectual Property ABInventors: Ingemar Hessman, Åke Johansson
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Patent number: 7338235Abstract: An internal broach for internally broaching profiles, defined by a bottom and flanks, of female serrations of a work piece having a toothed section with several rows of broach cutting teeth, the rows being disposed successively counter to a direction of broaching, with successive broach cutting teeth being allocated to each other for broaching a profile. The broach cutting teeth have bottom cutting blades and first and second sides. The first sides are guide flanks, the edges of which are guide edges without cutting ability. The second sides are relieved flanks, the edges of which are relieved edges without cutting ability.Type: GrantFiled: December 3, 2003Date of Patent: March 4, 2008Assignee: Forst Technologie GmbH & Co. KGInventors: Norbert Weghaus, Otto Pfitzer, Andreas Berktold
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Patent number: 7326012Abstract: The apparatus of the present invention provides a broaching machine configured to produce an internal gear member. The broaching machine includes a broaching tool defining a central axis. The broaching tool includes a first set of broaching teeth configured to cut both a first flank portion and a second flank portion of a plurality of gear teeth. The broaching tool also includes a second set of broaching teeth configured to cut only the second flank portion of the plurality of gear teeth. The plurality of gear teeth are formed such that the first and second flank portions of each gear tooth are tapered between a first end portion and a second end portion. The broaching machine also includes a motor configured to rotate the broaching tool about the central axis at a selectable rate and in a selectable direction. A corresponding method for producing an internal gear member is also provided.Type: GrantFiled: June 30, 2006Date of Patent: February 5, 2008Assignee: GM Global Technology Operations, Inc.Inventor: Laurent Schlotter
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Patent number: 7251975Abstract: A manufacturing tool (20) for forming a dynamic pressure groove (52) in an inner peripheral surface of a bearing sleeve (50) includes a tool shaft (21) for being rotated in a bore of the bearing sleeve while being moved in an axial direction thereof. Protrusions (25) are integrally and circumferentially arranged on an outer periphery of the tool shaft near a leading end (22) thereof. Machining tips (26) are integrally formed on outmost ends of the protrusions for machining the inner peripheral surface of the bearing sleeve to form the dynamic pressure groove therein.Type: GrantFiled: June 24, 2005Date of Patent: August 7, 2007Assignee: Foxconn Technology Co., Ltd.Inventors: Wun-Chang Shih, Huan-Chao Lin, Ching-Hsing Huang, Chien-Long Hong, Hsien-Sheng Pei
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Patent number: 7021874Abstract: A broach for internal broaching is formed on its pull end and/or follower end with a tapered surface machined with high accuracy. A pull head and/or a retrieving head of a broaching machine, which drivingly grip the pull end and the follower end the broach, is formed with a tapered inner surface complementary to the tapered surface of the broach. The pull head and the retrieving head grip the broach while pressing and clamping their tapered inner surface against the tapered surface, and these heads and the broach are firmly connected together. Clearances or gaps between the heads and the broach are thus eliminated, concentricity between the heads and the broach is significantly improved, and broaching can be performed with high accuracy.Type: GrantFiled: November 25, 2003Date of Patent: April 4, 2006Assignees: Nachi-Fujikoshi Corp., Fuji Heavy Industries, Ltd.Inventors: Katsuyuki Shimasaku, Chiaki Uwai
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Patent number: 6935026Abstract: The invention relates to a wheel bearing assembly for motor vehicles with a bearing provided with an inner ring and an outer ring, the bearing being fitted with its outer ring into a bearing casing and the outer ring being mechanically supported in axial direction on a first side by a supporting surface provided on the bearing casing. Discrete and preferably evenly arranged stop protrusions are formed on the inner circumference of the bearing casing, the outer ring abutting thereon in axial direction on its second side, and the stop protrusions being formed by locally plastic forming the bearing casing.Type: GrantFiled: October 15, 2002Date of Patent: August 30, 2005Assignee: Visteon Global Technologies, Inc.Inventor: Michael Johannes Frantzen
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Patent number: 6918716Abstract: An internal broach for internally broaching profiles, defined by a bottom and flanks, of female serrations of a work piece, comprises a toothed portion with several rows of broach cutting teeth disposed successively counter to a direction of broaching, successive broach cutting teeth being allocated to each other for broaching a profile. The broach cutting teeth have bottom cutting blades and first and second sides. The first sides are guide flanks, the edges of which are guide edges without cutting ability. The second sides are flank-cutting-blade relief surfaces, the edges of which are designed as flank blades with cutting ability.Type: GrantFiled: December 5, 2002Date of Patent: July 19, 2005Assignee: Forst Technologie GmbH & Co. KGInventors: Andreas Berktold, Norbert Weghaus
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Patent number: 6857827Abstract: A spindle for machining inner grooves and including a cylindrical input guide of diameter D1 and a cutting portion. In the spindle the cutting portion is subdivided into a plurality of cutting sections separated by realigning guides having a diameter equal to diameter D1 of the input guide to accurately center the grooves relative to the hole previously machined in the workpiece.Type: GrantFiled: August 30, 2001Date of Patent: February 22, 2005Assignee: Hispano SuizaInventor: George Heyraud
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Publication number: 20040228698Abstract: A broach has a main body of a cemented carbide material. On this main body, a front grip portion, a cylindrical portion following the front grip portion and provided with a plurality of guide parts in its outer periphery, a broach cutting edge portion following an end of the cylindrical portion and having a number of cutting edges, and a cylindrical extension following the broach cutting edge portion and having a maximum outer periphery dimension to such an extent that the extension does not interfere with a work are integrally provided. On an end surface of the cylindrical extension, a load receiving shoulder is formed, which leads to a rear grip portion including a small-diameter part and is orthogonal to or inclined with respect to a broach axis. The load receiving shoulder has a sufficient area to bear a cutting load. A broaching machine grips the rear grip portion with its load receiving surface abutting against the load receiving shoulder of the cemented carbide broach.Type: ApplicationFiled: May 4, 2004Publication date: November 18, 2004Applicant: NACHI-FUJIKOSHI CORP.Inventors: Soichi Kakutani, Yasuhiro Murai
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Publication number: 20040165962Abstract: A broach for internal broaching is formed on its pull end and/or follower end with a tapered surface machined with high accuracy. A pull head and/or a retrieving head of a broaching machine, which drivingly grip the pull end and the follower end the broach, is formed with a tapered inner surface complementary to the tapered surface of the broach. The pull head and the retrieving head grip the broach while pressing and clamping their tapered inner surface against the tapered surface, and these heads and the broach are firmly connected together. Clearances or gaps between the heads and the broach are thus eliminated, concentricity between the heads and the broach is significantly improved, and broaching can be performed with high accuracy.Type: ApplicationFiled: November 25, 2003Publication date: August 26, 2004Applicants: NACHI-FUJIKOSHI CORP., Fuji Heavy Industries Ltd.Inventors: Katsuyuki Shimasaku, Chiaki Uwai
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Patent number: 6767168Abstract: A method and apparatus associated with forming a blade attachment slot in a gas turbine engine turbine disk. The method further includes a full-form finish honing that produces a blade attachment slot free of broach ripples. The apparatus includes a broach carrier and cutting inserts coupled to the support. The cutting inserts are interchangeable and can be replaced when worn or damaged. The carrier has integral support members for bracing the cutting inserts. Each cutting insert has lateral support surfaces to prevent the cutting insert from moving laterally within the cutting insert assembly. Further, the broach assembly can be used as a replacement for damaged portions of a broach. The cutting inserts can be manufactured utilizing a fixtured EDM process.Type: GrantFiled: June 4, 2001Date of Patent: July 27, 2004Assignee: Rolls-Royce CorporationInventor: Raymond T. Miller
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Patent number: 6702524Abstract: A broach tool including a row of longitudinally aligned cutting inserts (22) spaced apart by removable insert support members (25). The insert support members (25) and the cutting inserts (22) each have a root portion captured within the main body of the broach tool. Bracing support is provided to each of the cutting inserts (22) during a broaching operation by one of the insert support members (25).Type: GrantFiled: September 26, 2001Date of Patent: March 9, 2004Assignee: Rolls-Royce CorporationInventors: Raymond T. Miller, Richard Sharp
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Patent number: 6676336Abstract: The broach assembly includes alternate spacers and cutters arranged in a sub-assembly having a lead at a leading end and a lag at a trailing end. The cutters have side margins in excess of the margins of the spacers for cutting material from the dovetail slots of the turbine wheel as the broach assembly passes through the slots. The bottom or apices of each spacer and cutter are tapered to form a continuously tapered surface along the bottom of the broach assembly. Upon passing the broach assembly through the slot, the assembly is progressively displaced in a radial outward direction to progressively cut the active dovetail slot surfaces. Shims may be disposed in the bottom of the slot to further displace the broach assembly radially outwardly in multiple passes.Type: GrantFiled: November 13, 2001Date of Patent: January 13, 2004Assignee: General Electric CompanyInventors: John Francis Nolan, Ralph Arnold Pollock, Todd Joseph Fischer
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Patent number: 6634836Abstract: A broach assembly includes an elongated base having a central upward projection and a pair of side flanges and a tapered undersurface. Releasably mounted on the projection are multiple tool holders spaced along the length of the base. The tool holders mount cutters for engaging active surfaces of the wedge slot as the broach assembly is passed through the wedge slot. Shims may be interposed between the tool holders and base to increase the elevation of the cutting surfaces relative to the undersurface of the base to progressively increase the bearing pressure of the cutting surfaces against the active surfaces of the slot during multiple passes of the broach assembly through the wedge slot.Type: GrantFiled: November 9, 2001Date of Patent: October 21, 2003Assignee: General Electric CompanyInventors: John Francis Nolan, Ralph Arnold Pollock, Todd Joseph Fischer
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Patent number: 6619890Abstract: A broach tool comprises a very stiff backing member and has an arbor adapted to be received into the hollow spindle of a machine tool, for example a multi-axis, computer controlled machining center. The backing member carries a plurality of cutting points disposed to perform successive cutting operations as the broach tool is pushed through a workpiece by relative movement of a worktable and the machine spindle. The broach tool is formed with externally extending passageways to supply coolant to the cutting points. The coolant may be supplied through the machine spindle.Type: GrantFiled: July 20, 2001Date of Patent: September 16, 2003Assignee: Rolls-Royce plcInventor: Christopher P R Hill
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Publication number: 20030091398Abstract: A broach assembly includes an elongated base having a central upward projection and a pair of side flanges and a tapered undersurface. Releasably mounted on the projection are multiple tool holders spaced along the length of the base. The tool holders mount cutters for engaging active surfaces of the wedge slot as the broach assembly is passed through the wedge slot. Shims may be interposed between the tool holders and base to increase the elevation of the cutting surfaces relative to the undersurface of the base to progressively increase the bearing pressure of the cutting surfaces against the active surfaces of the slot during multiple passes of the broach assembly through the wedge slot.Type: ApplicationFiled: November 9, 2001Publication date: May 15, 2003Inventors: John Francis Nolan, Ralph Arnold Pollock, Todd Joseph Fischer
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Publication number: 20030086765Abstract: The broach assembly includes alternate spacers and cutters arranged in a sub-assembly having a lead at a leading end and a lag at a trailing end. The cutters have side margins in excess of the margins of the spacers for cutting material from the dovetail slots of the turbine wheel as the broach assembly passes through the slots. The bottom or apices of each spacer is tapered and extends beyond the corresponding surface of the cutter to progressively displace the assembly in a radial outward direction to progressively cut the active dovetail slot surfaces. Shims may be disposed in the bottom of the slot to further displace the broach assembly radially outwardly in multiple passes.Type: ApplicationFiled: November 7, 2001Publication date: May 8, 2003Inventors: John F. Nolan, Ralph A. Pollock, Todd Joseph Fischer
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Patent number: 6558086Abstract: A broach comprises an elongate body having a plurality of longitudinally spaced pockets therein. A threaded hole is provided in each of the pockets. The pockets are adapted to receive cutting inserts. The cutting inserts have a hole that is adapted to align with a hole in the pockets. The aligning holes are adapted to receive insert screws. The insert screws are threadably received in the threaded hole in the pockets. When a cutting insert becomes worn or damaged, it may be removed from its pocket and replaced with another cutting insert. Hence, the broach need not be discarded because of a worn or damaged cutting insert.Type: GrantFiled: July 14, 2000Date of Patent: May 6, 2003Assignee: Kennametal Inc.Inventors: David A. Rigotti, Gregory J. Lavoie
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Patent number: 6551032Abstract: The broach assembly includes alternate spacers and cutters arranged in a sub-assembly having a lead at a leading end and a lag at a trailing end. The cutters have side margins in excess of the margins of the spacers for cutting material from the dovetail slots of the turbine wheel as the broach assembly passes through the slots. The bottom or apices of each spacer is tapered and extends beyond the corresponding surface of the cutter to progressively displace the assembly in a radial outward direction to progressively cut the active dovetail slot surfaces. Shims may be disposed in the bottom of the slot to further displace the broach assembly radially outwardly in multiple passes.Type: GrantFiled: November 7, 2001Date of Patent: April 22, 2003Assignee: General Electric CompanyInventors: John F. Nolan, Ralph A. Pollock, Todd Joseph Fischer
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Patent number: 6527484Abstract: A helical gear tooth broach having an elongate body having a series of axially aligned and spaced teeth disposed thereon. The direction of tooth spaces or traces of the teeth in a longitudinally extending helical alignment and the direction of the gullets of the teeth in a side by side circumferentially extending helical arrangement are both oriented at a right-upward or a left-upward helix angle in common with each other.Type: GrantFiled: July 11, 2001Date of Patent: March 4, 2003Assignees: Nachi-Fujikoshi Corp., Aisin AW Co., Ltd.Inventors: Kazuyuki Nakamura, Yasushi Nogawa, Hidetaka Nakae, Katsuhiko Nishimura
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Publication number: 20030012610Abstract: The invention concerns a spindle (1) for machining inner grooves and comprising a cylindrical input guide (15) of diameter D1 and a cutting portion (20). Said spindle is characterised in that the cutting portion (20) is subdivided into a plurality of cutting sections (25) separated by realigning guides (26) having a diameter equal to diameter D1 of the input guide (15), so as to accurately centre the grooves relative to the hole previously machined in the workpiece (30).Type: ApplicationFiled: August 9, 2002Publication date: January 16, 2003Inventor: Georges Heyraud
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Publication number: 20020182017Abstract: A broach tool including a row of longitudinally aligned cutting inserts (22) spaced apart by removable insert support members (25). The insert support members (25) and the cutting inserts (22) each have a root portion captured within the main body of the broach tool. Bracing support is provided to each of the cutting inserts (22) during a broaching operation by one of the insert support members (25).Type: ApplicationFiled: September 26, 2001Publication date: December 5, 2002Inventors: Raymond T. Miller, Richard Sharp
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Publication number: 20020025232Abstract: A method and apparatus associated with forming a blade attachment slot in a gas turbine engine turbine disk. The method further includes a full-form finish honing that produces a blade attachment slot free of broach ripples. The apparatus includes a broach carrier and cutting inserts coupled to the support. The cutting inserts are interchangeable and can be replaced when worn or damaged. The carrier has integral support members for bracing the cutting inserts. Each cutting insert has lateral support surfaces to prevent the cutting insert from moving laterally within the cutting insert assembly. Further, the broach assembly can be used as a replacement for damaged portions of a broach. The cutting inserts can be manufactured utilizing a fixtured EDM process.Type: ApplicationFiled: June 4, 2001Publication date: February 28, 2002Inventor: Raymond T. Miller
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Publication number: 20020015622Abstract: A helical gear tooth broach is provided which does not require to clamp strongly the work to be broached by a special clamping device, and which does not perform an intermittent cutting action against the work. A gear tooth broach is provided having an elongate body having a series of axially aligned and spaced teeth disposed thereon. The direction of tooth spaces or traces of the teeth in a longitudinally extending helical alignment and the direction of the gullets of the teeth in a general side by side circumferentially extending helical arrangement are both oriented to the same hand of helix angle.Type: ApplicationFiled: July 11, 2001Publication date: February 7, 2002Inventors: Kazuyuki Nakamura, Yasushi Nogawa, Hidetaka Nakae, Katsuhiko Nishimura
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Publication number: 20020012573Abstract: A broach tool comprises a very stiff backing member and has an arbor adapted to be received into the hollow spindle of a machine tool, for example a multi-axis, computer controlled machining center. The backing member carries a plurality of cutting points disposed to perform successive cutting operations as the broach tool is pushed through a workpiece by relative movement of a worktable and the machine spindle. The broach tool is formed with externally extending passageways to supply coolant to the cutting points. The coolant may be supplied through the machine spindle.Type: ApplicationFiled: July 20, 2001Publication date: January 31, 2002Applicant: ROLLS-ROYCE plcInventor: Christopher P. R. Hill
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Patent number: 5865569Abstract: An internal broach for the broaching of profiles defined by a bottom and flanks, in particular of internal toothings, in a workpiece is provided with broach cutting teeth which have bottom-cutting edges and flank-cutting edges. Over their full profile height, the flank-cutting edges of broach cutting teeth disposed one after the other and allocated to each other have an ascending profile in the range of 1 .mu.m to 3 .mu.m.Type: GrantFiled: November 5, 1996Date of Patent: February 2, 1999Assignee: Oswald Forst Maschinenfabrik und Apparatebauanstalt GmbH & Co KommanditgesellschaftInventors: Herbert Holstein, Reinhard Melcher
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Patent number: 5503506Abstract: A broaching tool has a plurality of cutting teeth for broaching a small, deep hole with high precision and surface finish. Three to eight teeth are engaged in the hole for cutting at any one time. For broaching sticky metals such as stainless steel, each cutting tooth has a face angle, backoff angle and rise which are sufficiently large to prevent thermal hardening of the hole surface. A ring is provided between the front face and land of each cutting tooth having a width selected to prevent formation of axial and ring-shaped tool traces. V-shaped notches having a large radial angle and a small backoff angle are formed in the land of each cutting tooth to break chips and prevent clogging. The tool further includes a rear pilot having a plurality of smoothing teeth with a diameter larger than the finished diameter of the hole. A set of rough and fine broaching tools can be provided, with the fine tool being processed to convert it to a rough tool when it is worn beyond tolerance.Type: GrantFiled: June 24, 1993Date of Patent: April 2, 1996Assignee: Hughes Aircraft CompanyInventor: Lin-Sen Yuan
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Patent number: 4993889Abstract: A broach assembly including a holder having an elongated slot for housing at least one cutting insert and semicircular wedges having a pair of cutting insert engaging faces which are adapted to secure the cutting inserts in the slot and to prevent misalignment and uneven wear.Type: GrantFiled: August 10, 1989Date of Patent: February 19, 1991Assignee: Carboloy Inc.Inventor: Walter Kelm
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Patent number: 4573841Abstract: Method of and tool for the precise and finish processing of profiled cylindrical holes in a metal workpiece, wherein the length to billet diameter ratio of the hole is larger than 3. In accordance with the method of the invention, there is preliminary chip removal along the hole being processed, and the hole is later plastically deformed by fluid fed to the deformation zone thereof under high pressure. Fluid under high pressure is also fed to the zone of chip removal and is directed toward the chips removed from the material.The tool for carrying out the method comprises guiding, cutting, deforming and sizing parts disposed in such sequence and mounted upon a tool body. The tool body is provided with a blind axial hole through which the fluid under high pressure is supplied to the deformation zone of the hole in the workpiece and to the zone of chip removal where it is directed toward the chips removed from the material of the workpiece.Type: GrantFiled: November 15, 1983Date of Patent: March 4, 1986Assignee: N P S P po Hydroplastichna Obrabotka na MetaliteInventors: Georgi K. Petkov, Nikola M. Netzov, Botyo P. Botev, Dimiter N. Bankovski
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Patent number: 4462723Abstract: A broaching tool is formed with a slot within which an adjusting member is received. By adjusting the position of the adjusting member within the slot, forces are developed against the sides of the slot to deform the broaching tool thereby to adjust the operating dimensions of cutting teeth arranged on the broaching tool in the vicinity of the slot.Type: GrantFiled: May 27, 1982Date of Patent: July 31, 1984Assignee: Lohr & Bromkamp GmbHInventors: Heinz-Peter Walter, Horst Hahn
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Patent number: 4336831Abstract: A machine and a tool for cutting material such as wood and plastics. The tool includes a shank adapted to be fastened to and rotated by a power driven spindle. The tool further includes a cutting part having at least one spiral rib on its outer periphery. The outer periphery of the rib is sharpened on its edge which is adjacent the shank, and the spiral rib has a pitch in the range of approximately 5.degree. to 15.degree.. The machine includes the tool, a drive motor and the spindle, and a support table for supporting a workpiece. The table has an opening formed in it and the tool extends through the opening. The sharpened edge of the rib is adjacent the table.Type: GrantFiled: August 11, 1980Date of Patent: June 29, 1982Inventor: Zbigniew Mroczkowski
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Patent number: 4266894Abstract: The machine of the invention comprises a base designed to accomodate a blank being machined, and a mandrel with a broach connected to a hydraulic drive imparting movement thereto. The mandrel is provided with a guide located between a broach-supporting end of the mandrel and its other, fixed end. The guide has a passage for the mandrel in the course of inside broaching in the blank. According to one of the embodiments of the invention, the guide is made as a traverse resting against uprights fixed on the base. The traverse has a guide passage for the broach-supporting mandrel and two holes arranged symmetrically with respect to the guide passage and serving as guides for the rods of hydraulic cylinders of the machine hydraulic drive. Each one of the hydraulic cylinders is located partly in the base and partly in the upright. The rods are interconnected above the traverse with a cross-piece supporting the mandrel with broach.Type: GrantFiled: September 11, 1978Date of Patent: May 12, 1981Inventors: Georgy I. Zuzanov, Jury P. Ignatov, Sergei P. Chinenov