Using External Rotating Tool And Internal Core Patents (Class 72/96)
  • Patent number: 10857580
    Abstract: A method and apparatus for producing gun barrels having a grooved or ribbed inner surface with straight or helical grooves or ribs, by providing a metallic hollow cylindrical pre-form, placing the pre-form on a core mandrel being part of a flow forming machine having a main machine axis, the core mandrel having a structured outer surface comprising ribs and/or grooves extending straightly parallel to and/or helically around the main axis; and applying forming rollers, in a roller arrangement, to the outside surface of the pre-form so as to apply radial pressure on the pre-form such that its material begins to flow. As the rollers apply force upon the pre-form, a relative motion between the pre-form and the rollers is performed by moving the pre-form in axially parallel to the main axis through the roller arrangement or by moving the roller arrangement alongside the pre-form.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: December 8, 2020
    Assignee: Repkon Machine and Tool Industry and Trade Inc.
    Inventor: Ayet Azer Aran
  • Patent number: 9636725
    Abstract: The invention relates to a pipe rolling plant 10 comprising a rotary piercer 20, a treatment station 30 and a main rolling mill 40. The rotary piercer and the treatment station are arranged so that the pierced blank 51 leaving them is arranged with the irregular tail 511 facing the main rolling mill 40 and with the regular head 510 facing the mandrel 41. The invention also relates to a rolling mill 40 comprising a plurality of rolling stations 43, each station comprising a plurality of rolling rolls 42, the radial position h of which is adjustable. The rolling mill also comprises a control circuit for calculating and/or measuring the distance d between the axes of rotation r of the rolls and the trailing edge 520 of the pipe 52. The control circuit is also designed to displace the rolling rolls radially towards the outside of the pipe in each rolling station 43n when the distance d assumes a predetermined value d0.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: May 2, 2017
    Assignee: SMS INNSE S.P.A.
    Inventors: Guido Emilio Zanella, Vincenzo Palma, Marco Ghisolfi
  • Patent number: 9631873
    Abstract: One exemplary embodiment can be a process for transferring heat to a first stream from a second stream in a hydrocarbon process. The process can include passing the first stream through at least one generally vertically-orientated tube in an exchanger. An interior surface of the at least one generally vertically-orientated tube may form one or more curved irregularities where the first stream, prior to entering the at least one generally vertically-orientated tube, may include a mixture of a gas including hydrogen and at least one or more C1-C3 hydrocarbons, and a liquid including one or more C4-C13 hydrocarbons.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: April 25, 2017
    Assignee: UOP LLC
    Inventors: Phillip F. Daly, Kenneth D. Peters
  • Patent number: 9358365
    Abstract: A catheter is configured to access a renal artery. A lumen of the catheter's shaft is dimensioned to receive a flexible actuation member which extends between the shaft's proximal and distal ends. The actuation member is moveable within the lumen and subject to elastic deformation, friction, and/or whip along its length. A flexible support member is coupled to a distal end of the actuation member and extendible beyond a distal tip of the shaft. An RF ablation electrode at a distal end of the support member is configured to ablated perivascular renal nerve tissue. A position converter at the distal end of the shaft is configured to convert movement of the actuation member into one or both of controlled rotational and axial movement of the support member and electrode to one of a multiplicity of stable circumferential positions substantially free of elastic deformation, friction, and/or whip impacting actuation member movement.
    Type: Grant
    Filed: July 30, 2011
    Date of Patent: June 7, 2016
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Scott Smith, Leonard B. Richardson, Mark L. Jenson
  • Patent number: 8984921
    Abstract: A device for manufacturing or processing work pieces consists of a preform (4.1), with a mandrel (1a) that is supported rotatably and parallel to a longitudinal axis (x) of the device, an associated chuck (1b) for clamping the preform (4.1) as well as a spindle sleeve (2a) that can be coupled with the mandrel (1a) and can be moved along the longitudinal direction (x), and with a forming unit (3) for forming the preform (4.1). The chuck (1b) is designed in a rotational fashion in relation to the mandrel (1a).
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: March 24, 2015
    Assignee: Repkon Machine and Tool Industry and Trade Inc.
    Inventor: Karl-Heinz Köstermeier
  • Patent number: 8601844
    Abstract: A multi-roll mandrel mill comprises a plurality of grooved roll bodies as a roll pass for elongation rolling of a shell and a plurality of roll stands, each having roll shafts and roll chock portions for driving the grooved roll bodies for driving the grooved roll bodies, wherein bearings are internally contained in each grooved roll body. Optimizing the design of roll chock portions for every setup is achieved by a tube-making setup of the mandrel mill, wherein at least one of either or both of the roll shafts and the roll chock portions is replaced with a part(s) having a different shape(s) in addition to changing of the grooved roll bodies. The optimization of the design is effective in preventing underfill and overfill.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: December 10, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventor: Akihito Yamane
  • Patent number: 8584498
    Abstract: The present invention provides a mandrel mill and the like that is capable of not only enhancing the elongation ratio of the pipe or tube, but also suppressing a pinhole defect from occurring. The first means of the present invention provides a mandrel mill comprising a plurality of rolling stands in which two grooved rolls R11, R12 are disposed, respectively, the mandrel mill being characterized in that the roll diameter ratio for the first rolling stand and the second rolling stand is set at a value of 4.6 or over. The second means of the present invention provides a mandrel mill comprising a plurality of rolling stands in which three grooved rolls R21, R22 and R23 are disposed, respectively, the mandrel mill being characterized in that the roll diameter ratio for the first rolling stand and the second rolling stand is set at a value of 2.8 or over.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: November 19, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventor: Akihito Yamane
  • Patent number: 8490450
    Abstract: A retract mandrel mill, comprising a mandrel mill and an extractor, the mandrel mill including a mandrel bar and being configured to roll a tube blank into which the mandrel bar is inserted, the extractor being configured to extract the mandrel bar from the tube blank that has been rolled in the mandrel mill, wherein the distance between the mandrel mill and the extractor is adjustable, and a method for rolling a tube blank by using the retract mandrel mill. As the result of the adjustable distance, even when a tube blank which is shorter than usual is rolled, there is no need to add an extra extension to the length of the tube blank to be elongation-rolled, and the wear of the mandrel bar can be suppressed so that the tube blank can be rolled efficiently and with high yields.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: July 23, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventor: Akihito Yamane
  • Patent number: 8387430
    Abstract: The present invention relates to a system and method for rolling a seamless tube. The plant comprises a main rolling mill with adjustable rolls for mandrel-rolling a semi-finished tube. The plant also comprises a fixed-roll extracting/reducing mill positioned downstream of the main rolling mill. The extracting/reducing mill is designed to extract the semi-finished tube from the mandrel and reduce its diameter to a predetermined value close to that desired for the finished tube. Finally, the plant comprises a adjustable-roll sizing mill. The sizing mill is positioned downstream of the extracting/reducing mill. This sizing mill is designed to adjust the radial position of the rolls and define the diameter of the outgoing tube.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: March 5, 2013
    Assignee: SMS Innse SpA
    Inventors: Paolo Marin, Vincenzo Palma, Marco Ghisolfi, Guido Emilio Zanella, Jacopo Grassino, Alberto Vittorio Maria Bregante
  • Patent number: 8307683
    Abstract: An apparatus for manufacturing a coil spring. In the apparatus, a body is provided and a pair of machining units are disposed on the body to oppose each other at one end thereof. In each of the machining units, a mandrel is disposed in an upper central part of the body. The mandrel is rotatably configured to wind a coil spring material around an outer circumference thereof. A first motor is disposed at the other end of the machining unit to provide a driving force for rotating the mandrel. Also, a guide roller part is disposed movable along a length direction of the mandrel to guide the coil spring material to be wound around the mandrel. Two coil spring materials produced from a furnace are wound around the mandrels, respectively to produce two coil springs through one process.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: November 13, 2012
    Assignee: Daewon Kang Up Co., Ltd.
    Inventor: Chan Gi Jung
  • Patent number: 8166792
    Abstract: In a method of making a seamless hot-finished steel pipe a billet heated to a shaping temperature is pierced by a first shaping to a thick-walled hollow ingot which subsequently undergoes a radial forging process using an internal tool inserted in the hollow ingot and at least two forging jaws of a forging machine. The forging jaws act on the outer surface area of the hollow ingot, wherein the hollow ingot is turned and axially advanced in a clocked manner in the idle stroke phase of the forging jaws.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: May 1, 2012
    Assignee: V & M Deutschland GmbH
    Inventors: Christoph Prasser, Rolf Kümmerling, Stefan Wiedenmaier, Pierre Lefebvre, Rupert Wieser, Robert Koppensteiner
  • Patent number: 8161788
    Abstract: A method for producing workpieces wherein a generally cylindrical preform (8) is formed by at least one pressure roller (7) into a finished workpiece (8.2). The method includes slidingly placing a portion of the preform (8) on at least a first mandrel (3, 4?) which is slidably mounted in parallel with the longitudinal axis (A) of the preform (8), aligning the mandrel (3, 4?) such that the surface (3b, 4b, 4b?) thereof disposed within the preform (8) substantially defines a negative profile of an inner surface to be formed in said preform (8), and performing a relative movement between the preform (8) and the pressure roller (7) in a direction parallel to the longitudinal axis (A) while pressing the pressure roller (7) against the preform (8) such that material of the preform (8) is displaced by the pressure roller (7) in such a way that the mandrel (3, 4?) is moved by the displaced material.
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: April 24, 2012
    Assignee: REPKON Machine and Tool Industry and Trade Inc.
    Inventor: Karl-Heinz Köstermeier
  • Patent number: 8092612
    Abstract: A cooling device (70) for cooling a work piece (9) that has reached a high temperature due to the implementation of a closing operation in which a bottom portion (9c) is formed by closing an end portion of the tubular work piece (9) comprises a tilting mechanism (151) which tilts the work piece (9) such that the bottom portion (9c) faces downwards and a cooling water tank (155) storing cooling water. The bottom portion (9c) of the work piece (9) tilted by the tilting mechanism (151) is submerged in cooling water stored in the cooling water tank (155).
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: January 10, 2012
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Keisuke Mishima, Hirofumi Kuroda
  • Patent number: 8082767
    Abstract: The present invention provides a lubricant for hot metal working which is capable of inhibiting generation of white scale, attributed to the lubricant, on the surface of a workpiece material and is capable of improving lubricity to obtain favorable appearance of the finished product. The lubricant for hot metal working comprises a silicate compound used for adding to a lubricant composition mainly containing sodium borate.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: December 27, 2011
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Kenichi Sasaki, Sumio Iida, Shizuo Mori
  • Patent number: 8056228
    Abstract: The invention relates to a method for roughening the surface of a metal sheet used as electrode support in industrial electrochemical applications, and an electrode made by such method. Mechanical roughening is imparted by skin-passing the sheet between two rollers of a rolling mill, at least one of which is patterned according to a predetermined profile to be transferred by compression to the surface of the metal sheet.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: November 15, 2011
    Assignee: Industrie De Nora S.p.A.
    Inventor: Dino Floriano Di Franco
  • Patent number: 8037732
    Abstract: A hole 30 is formed in the center of the rear end face 20 of a round billet 10. The hole 30 has a predetermined depth from the rear end face 20 and a plurality of grooves 31 are provided in the side surface thereof. Each groove 31 extends in the depth direction of the hole 30. Piercing and rolling of the round billet 10 having the hole 30 is performed using a piercing mill having a plug. During piercing and rolling, the bottom surface of the hole 30 is broken through by the plug and a protrusion which is to be the starting point of burrs is formed, and the protrusion is absorbed by the groove 31 as the plug advances. Consequently, formation of burrs at the rear end of a hollow shell after piercing-rolling thereof can be suppressed.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: October 18, 2011
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Kazuhiro Shimoda, Tomio Yamakawa, Koji Muramatsu, Yuji Inoue
  • Patent number: 7942028
    Abstract: Disclosed is a device and method for forming a curl in a closable container. A process of forming a pre-curl is used, which is followed by a second separate step of forming the completed curl. The two-step process provides for higher tolerances with respect to the shape of the curl that allows the curl to be used as a sealing surface for a recloseable metal bottle. A three-step process provides for even greater tolerances and reduces longitudinal forces by completing the curl using lateral forces.
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: May 17, 2011
    Assignee: Stolle Machinery Company, LLC
    Inventors: Kevin Gillest, Andrew Le, Harold Cook, Jr., Michael L. Atkinson
  • Patent number: 7895870
    Abstract: An exemplary embodiment of the invention provides a method for producing an ultra thin wall metallic tube by cold working method with significant wall thickness reduction. In a method for producing the metallic tube with a cold pilger mill according to the invention, cold rolling is performed while tube diameters are being expanded using rolls having tapered groove dies whose calibers increase from an engaging entry side toward a finishing exit side. In a method for producing the metallic tube with a drawing machine according to the invention, cold drawing is performed while the tube diameters are being expanded using a solid die whose calibers increase from an engaging entry side toward a finishing exit side and a plug of a tapered mandrel bar whose diameters increase from an entry side of the die toward an exit side. In the metallic tube producing method, a maximum diameter of the plug or tapered mandrel bar may be larger than an outside diameter of the mother tube.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: March 1, 2011
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventor: Chihiro Hayashi
  • Patent number: 7861572
    Abstract: A method and device are disclosed for producing tubes that are at least partially profiled on their interior and preferably on their exterior from a hollow cylindrical blank (3), using a mechanical cold forming method, wherein the end of the blank (3) that is not to be machined (3?) is fed to a clamping device (10). The blank (3) is then secured in the clamping device (10) and a mandrel (2) is subsequently inserted into the end of region (3) of the blank (3) that is to be machined. A lance (8) is guided in the mandrel so that it can be coaxially displaced in a longitudinal direction and the free end of the lance (8?) can be introduced into the clamping device (10). The tip (8?) of the lance (8) is then brought into a positive fit with the clamping device (10) in the axial direction of the blank (3) and the mandrel (2), together with the clamping device (10) and the blank (3) is guided axially through a fixed machining point (6).
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: January 4, 2011
    Assignee: Ernst Grob AG
    Inventor: Peter Geser
  • Patent number: 7854156
    Abstract: A closing device 100 which presses a die 2 against a rotating pipe body 1 such that an open end portion of the pipe body 1 is plastically closed by the die 2 includes a cored bar 3 inserted into the pipe body 1 to close the open end portion of the pipe body 1 on the opposite side of the die 2, and a reactive force applying mechanism 43, 60 which allows the cored bar 3 to retreat and applies a reactive force to the retreating cored bar 3 when the cored bar 3 receives a predetermined load or more during processing of the pipe body 1 by the die 2.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: December 21, 2010
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Naomasa Tsuda, Keisuke Mishima
  • Publication number: 20090288464
    Abstract: A method for producing workpieces wherein a generally cylindrical preform (8) is formed by at least one pressure roller (7) into a finished workpiece (8.2). The method includes slidingly placing a portion of the preform (8) on at least a first mandrel (3, 4?) which is slidably mounted in parallel with the longitudinal axis (A) of the preform (8), aligning the mandrel (3, 4?) such that the surface (3b, 4b, 4b?) thereof disposed within the preform (8) substantially defines a negative profile of an inner surface to be formed in said preform (8), and performing a relative movement between the preform (8) and the pressure roller (7) in a direction parallel to the longitudinal axis (A) while pressing the pressure roller (7) against the preform (8) such that material of the preform (8) is displaced by the pressure roller (7) in such a way that the mandrel (3, 4?) is moved by the displaced material.
    Type: Application
    Filed: May 26, 2009
    Publication date: November 26, 2009
    Applicant: Repkon Machine and Tool Industry & Trade Ltd.
    Inventor: Karl-Heinz Kostermeier
  • Patent number: 7509828
    Abstract: An improved tool assembly for enhancing the surface of a heat transfer tube is provided. The tool assembly includes rods having cutting tips and positioned in rod guides which are slidably positioned in shafts provided in a tool holder. In an equilibrium state, the cutting tips do not extend from the tool holder. When a force is applied to the rod guides, the rod guides move in a first direction along the shafts in the tool holder, resulting in exposure of the cutting tips which enhance the tube surface. When the force is removed from the rod guides, the rod guides move along the shafts in a direction opposite the first direction to retract the cutting tips within the tool holder. In this way, the cutting tips are protected when not in use.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: March 31, 2009
    Assignee: Wolverine Tube, Inc.
    Inventors: Petur Thors, Nikolai Zoubkov
  • Publication number: 20090056400
    Abstract: The invention relates to a method and a device for transversely rolling stepped hollow shafts or cylindrical hollow parts from a pipe. The invention achieves the object of rolling stepped hollow shafts of the most varied dimensions and also of greater lengths in a flexible manner from a pipe using a small number of simple tools. In accordance with the invention, the object is achieved by virtue of the fact that rolling tools which can be radially advanced and are disposed in a planet-like manner around the workpiece are used to roll the contour of the transition from a central diameter in one portion of the workpiece to the central diameter in the adjacent portion by means of co-ordinated control of the radial advance of the rolling tools and the axial feed of the workpiece, and a mandrel head having an outer diameter which is adapted to the smallest inner diameter of the two portions is disposed underneath the rolling tools.
    Type: Application
    Filed: August 29, 2008
    Publication date: March 5, 2009
    Applicant: ThyssenKrupp Bilstein Suspension GmbH
    Inventors: Hans Dziemballa, Lutz Manke, Mario Houska, Thomas Ficker, Andre Hardtmann
  • Patent number: 6980959
    Abstract: A method and system of managing a configuration of mechanical equipment provides a structured procedure for managing information on parameters of the mechanical equipment to facilitate the maintenance of safety, legal compliance, performance, and reliability of the mechanical equipment. A desired configuration of the mechanical equipment is defined based on a design objective, such as safety, reliability, performance, or any combination of the foregoing objectives. An actual configuration of the mechanical equipment is determined based on an evaluation of the mechanical equipment. Upgrade requirements are planned for upgrading the actual configuration to the desired configuration if the actual configuration is noncompliant with the desired configuration.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: December 27, 2005
    Assignee: Accenture LLP
    Inventors: Gary R. Garrow, Charles P. Newton, III, Patrick E. Weir, David P. West, II, Michael Wetzer
  • Patent number: 6976377
    Abstract: In the planetary skew rolling blooms to form seamless metal tubing or pipe the internal tool is retracted at the leading and/or trailing end of the tubular bloom to allow the rolls to seal the end or ends and prevent coolant from entering the rolled tubing or bloom. The internal tool is advanced back into its normal rolling position after the end has passed the rolling location.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: December 20, 2005
    Assignee: SMS Meer GmbH
    Inventors: Hermann-Josef Klingen, Thomas Winterfeldt, Norbert Zillekens
  • Patent number: 6968719
    Abstract: A machine may produce a tube having textured internal and external surfaces in a single operation. Inner and outer knurling tools may form the textured surfaces. The texturing of the internal and external surfaces may be helical patterns of ribs and grooves. The height of the ribs formed in the internal and external surfaces may be less than about 35 mils. The angles of the patterns relative to a longitudinal axis of the tube may be less than about 45°. The angle of the helical pattern allows textured tubes to be used as heat exchanger elements wherein flow is directed substantially coaxial to the longitudinal axes of the tubes. The helical pattern formed in the external surface may be oriented in a right hand or left hand helical orientation. Similarly, the helical pattern formed in the internal surface may be oriented in a right hand or left hand orientation.
    Type: Grant
    Filed: July 12, 2004
    Date of Patent: November 29, 2005
    Assignee: Packless Metal Hose, Inc.
    Inventor: L. Robert Zifferer
  • Patent number: 6920773
    Abstract: A method for manufacturing a tube made of a non-ferrous material, particularly a tube made of mainly copper, by rolling, in which method, in the first working step the tube billet is worked by rolling with conical rolls, so that mainly owing to the deformation resistance, the temperature of the billet under operation rises up to the recrystallization range, at least on the spot that is being worked. Essentially immediately after the first working step, the tube billet is subjected to at least one second working step with a second set of conical rolls, in which case the tube billet is maintained, at least during the first working step and at least a second working step in non-oxidizing conditions. The invention also relates to an apparatus.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: July 26, 2005
    Assignee: Outokumpu Oyj
    Inventor: Matti Leiponen
  • Patent number: 6892559
    Abstract: A method for manufacturing a tube made of a non-ferrous material, particularly a tube made of mainly copper, in which method, in the first working step the tube billet is worked so that mainly owing to the deformation resistance, the temperature of the tube billet under operation rises up to the recrystallization range, at least on the spot that is being worked. Essentially immediately after the first working step, the tube billet is subjected to at least a second working step and the tube billet is maintained, at least during the first and second working step in non-oxidizing conditions. the invention also relates to an apparatus.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: May 17, 2005
    Assignee: Outokumpu Oyj
    Inventor: Matti Leiponen
  • Patent number: 6883358
    Abstract: A method of producing a sliding sleeve for gearshift mechanisms includes two forming steps. In the first forming step a preform, which has been pushed onto a tool mandrel with an external toothing, is formed by roller spinning so as to form on the inner circumferential surface of the preform the toothing implemented on the outer circumferential surface of the tool mandrel. Subsequently, the thus formed preform is formed by profile rolling on its outer circumferential surface so as to obtain a formed part. Finally, the tool mandrel is removed from the formed part.
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: April 26, 2005
    Assignee: Hay-Tec Automotive GmbH & Co. KG
    Inventor: Gerald Hauf
  • Publication number: 20040250587
    Abstract: A machine may produce a tube having textured internal and external surfaces in a single operation. Inner and outer knurling tools may form the textured surfaces. The texturing of the internal and external surfaces may be helical patterns of ribs and grooves. The height of the ribs formed in the internal and external surfaces may be less than about 35 mils. The angles of the patterns relative to a longitudinal axis of the tube may be less than about 45°. The angle of the helical pattern allows textured tubes to be used as heat exchanger elements wherein flow is directed substantially coaxial to the longitudinal axes of the tubes. The helical pattern formed in the external surface may be oriented in a right hand or left hand helical orientation. Similarly, the helical pattern formed in the internal surface may be oriented in a right hand or left hand orientation.
    Type: Application
    Filed: July 12, 2004
    Publication date: December 16, 2004
    Applicant: Packless Metal Hose, Inc.
    Inventor: L. Robert Zifferer
  • Patent number: 6746386
    Abstract: An exerciser includes a pair of frames each having a curved bottom surface for engaging with a supporting surface and for conducting swinging operations. A seat is secured between the frames for supporting a user and for elevating the user when the frames are swung relative to the supporting surface, against the weight of the users. A foot rest is resiliently coupled to the frames with one or more resilient members, for allowing users to move the foot rest away from the frames against the spring members, in order to exercise the lower muscle groups.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: June 8, 2004
    Inventor: Sherry Huang
  • Patent number: 6651473
    Abstract: Seamless tubing of a nonferrous material is made by continuously and concomitantly advancing a tubular workpiece of the nonferrous material along an axis through a rolling station, radially squeezing the workpiece in the station between external rolls and an internal mandrel to radially reduce a wall thickness of the workpiece and increase an axial length of the workpiece so that the workpiece is heated, and spraying a liquid coolant against the workpiece in and upstream of the station to maintain the workpiece at a temperature below a recrystallization temperature of the material.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: November 25, 2003
    Assignee: SMS Meer GmbH
    Inventor: Erling Roller
  • Publication number: 20030172701
    Abstract: The invention relates to a forming machine at least provided with a clamping device for clamping a hollow workpiece having at least one open end and a first forming tool which can be placed into contact with the outer surface of the workpiece and with which the workpiece can be deformed. The clamping device can be rotated about a first axis and moved with respect to this first axis. Thus, the forming machine can be of relatively straightforward design and operate at high rotational speeds, even when a tool head equipped with a relatively large number of rollers is being used. The invention further pertains to a method wherein the clamping device can be moved with respect to the said first axis.
    Type: Application
    Filed: January 20, 2003
    Publication date: September 18, 2003
    Inventor: Johan Massee
  • Patent number: 6530254
    Abstract: A rolling machine for processing a metal container which has a longitudinal seam and is made from a flat metal plate to form a cylindrical body having adjacent or overlapping butt edges securely joined to one another by folding or welding, whereupon a disk-shaped lower bottom and, optionally, a respective upper bottom, is welded or folded to the cylindrical body to form a closed container, or an open-topped container, respectively, is configured as a continuous rolling machine and includes an upper carrier frame; an upper rolling drum rotatably supported in the upper carrier frame; a lower drum stand; and a driven lower rolling drum rotatably mounted in the lower drum stand.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: March 11, 2003
    Assignee: Mauser-Werke GmbH & Co. KG
    Inventor: Hans-Jürgen Beierling
  • Patent number: 6497129
    Abstract: A method and device for rolling tube blanks in a planetary skew rolling mill continuously feeds tubular blanks which are to be rolled into the rolling gap end to end. A first tube blank is located in the rolling mill. A second tubular blank following the first tubular blank which is respectively located in the rolling gap of the rolling mill is fed forward with a rotation corresponding to the rotation of the end of the first tube blank caused by the torsion under the rollers in the rolling mill.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: December 24, 2002
    Assignee: SMS Demag AG
    Inventors: Thomas Pfeiffer, Horst Franken
  • Patent number: 6442988
    Abstract: A method of spin forming an open-ended container or other cylindrical metal workpiece by inserting a conically tapering mandrel coaxially therein and pressing the side wall of the workpiece against the inserted mandrel with plural symmetrically arranged forming discs while unidirectionally translating the workpiece, and independently translating the mandrel, relative to the forming discs.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: September 3, 2002
    Assignee: Alcan International Limited
    Inventors: Peter Hamstra, Stuart MacEwen
  • Publication number: 20020033035
    Abstract: A machine may produce a tube having textured internal and external surfaces in a single operation. Inner and outer knurling tools may form the textured surfaces. The texturing of the internal and external surfaces may be helical patterns of ribs and grooves. The height of the ribs formed in the internal and external surfaces may be less than about 35 mils. The angles of the patterns relative to a longitudinal axis of the tube may be less than about 45°. The angle of the helical pattern allows textured tubes to be used as heat exchanger elements wherein flow is directed substantially coaxial to the longitudinal axes of the tubes. The helical pattern formed in the external surface may be oriented in a right hand or left hand helical orientation. Similarly, the helical pattern formed in the internal surface may be oriented in a right hand or left hand orientation.
    Type: Application
    Filed: July 10, 2001
    Publication date: March 21, 2002
    Inventor: L. Robert Zifferer
  • Patent number: 6295854
    Abstract: According to the invention, a press roller device (1) for molding a grooved structure inside a tubular workpiece (7) has several press rollers (4,5,6), said press rollers rotating around a form tool (2) and being staggered axially in relation to one another. At least two of the press rollers (4,5) are driven in opposite directions to each other. This arrangement prevents the workpiece from twisting to a large extent.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: October 2, 2001
    Assignee: Dynamit Nobel GmbH Explosivstoff-und Systemtechnik
    Inventors: Bernd Stein, Karl-Heinz Putz, Heinz Steinhauer, Wilhelm Zimmermann
  • Patent number: 6269670
    Abstract: The invention relates to a method for working or forming a workpiece by flow-forming, particularly for the manufacture of internal teeth on the workpiece, in which a cup-shaped preform or blank is axially fixed against a tool chuck and pressed by means of at least one rolling body onto said tool chuck and the blank is rotated relative to the rolling body, the at least one rolling body, at the start of forming, at the open end of the blank is pressed against the cylinder wall area thereof and in axial relative movement is guided in forming contact over the cylinder wall area to the base of the blank.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: August 7, 2001
    Assignee: Leico GmbH & Co. Werkzeugmaschinenbau
    Inventor: Karl-Heinz Koestermeier
  • Patent number: 6089065
    Abstract: A process and device for manufacturing cylindrical hollow bodies out of a blank through cold forming using roll cylinders is provided. The axes of the roll cylinders in this process are essentially adjusted parallel to the axis of the workpiece and execute, essentially radial to the workpiece, an oscillating, reciprocating movement. This reciprocating movement is executed in such a manner that in the upper oscillation stop the roll cylinders and the workpiece preferably just barely touch each other without the application of force, and in the lower oscillation stop preferably dip into the surface of the workpiece up to the desired infeed depth in order to achieve the demanded external diameter of the workpiece. With this process the very high static pressures required for press roll machines can be avoided, which results in small and light engine frames, and simultaneously makes it possible to machine workpieces with flanges directly up to the flanges.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: July 18, 2000
    Assignee: Ernst Grob AG
    Inventor: Daniel Deriaz
  • Patent number: 5983689
    Abstract: A lubricant is provided for use in hot working such as cross-roll rolling of a seamless steel pipe. It effectively reduces the friction coefficient between the working tools and the material under the hot work, thus extending the lives of the tools. The lubricant contains: (A) from about 10 to about 60 wt % of alkali silicate; (B) from about 1 to about 20 wt % of silane coupling agent; (C) from about 0.1 to about 5.0 wt % of at least one kind of alkali compound selected from a group consisting of an alkali hydroxide, an alkali carbonate, an alkali borate and an alkali salt of mineral acid; and (D) from about 30 to about 70 wt % of water. Alternatively, the lubricant contains: (A) from about 10 to about 60 wt % of alkali silicate; (B) from about 1 to about 20 wt % of silane coupling agent; (C) from about 0.1 to about 5.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: November 16, 1999
    Assignee: Kawasaki Steel Corporation
    Inventors: Akira Yorifuji, Takaaki Toyooka, Ken Shimamoto, Masaharu Kita, Taro Kanayama
  • Patent number: 5916318
    Abstract: A machine for simultaneously forming helical threads or fins on the exterior of first, second and third elongated cylindrical workpieces, the machine having first, second and third arbor blocks arranged in a common plane and spaced about a center point in the plane, having first, second and third thread or fin forming discs rotatably affixed respectfully to the first, second and third arbor blocks, and having first, second and third guides longitudinally displaceably and rotationally receiving respectively the first, second and third workpieces so that the first workpiece is guided by the first guide between the first and second discs, the second workpiece is guided by the second guide between the second and third discs and the third workpiece is guided by the third guide between the first and third discs, rotary energy being coupled to at least one of the discs. In an alternate embodiment four elongated cylindrical members are provided with threads or fins.
    Type: Grant
    Filed: April 22, 1998
    Date of Patent: June 29, 1999
    Inventor: Ray C. Anderson
  • Patent number: 5765419
    Abstract: In an impact rolling apparatus the axes of roller heads are arranged substantially perpendicularly relative to the longitudinal axis of the workpiece. Accordingly, a displacing of the material at the workpiece proceeds predominantly tangentially perpendicularly to the longitudinal axis of the workpiece, caused by the impact effect of the impact rollers mounted at the roller heads. By this arrangement of the roller heads impact rolling operations can be performed close to a shoulder of the workpiece and marked steps thus maintaining the advantages over the known impact rolling method at which the displacement of the material proceeds predominantly in the direction of the longitudinal axis of the workpiece.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: June 16, 1998
    Assignee: Ernst Grob AG
    Inventor: Hans Krapfenbauer
  • Patent number: 5676007
    Abstract: In a flow-forming-machine having a rotatable spindle, a rotary drive for the spindle, and a pressure tool fitted to one of the spindle end faces, an axially movable counterpressure support for a workpiece is placed on the pressure tool, the counterpressure support being axially aligned with the spindle and having opposed sides. At least two rotatable pressure rollers are movably guided on a machine frame in a radial direction with respect to the spindle, while a pivot arm is provided on both the sides of the spindle and/or the counterpressure support. Each pivot arm is pivotal around an axis parallel to the longitudinal axis of the spindle by means of a powered drive. At least two pressure rollers are adjustably located on each pivot arm, and one of the pressure rollers is selectively positionable in an operable position and fixable at will for each pivot arm.
    Type: Grant
    Filed: February 13, 1996
    Date of Patent: October 14, 1997
    Assignee: Leifeld GmbH & Co.
    Inventor: Karl-Heinz Kostermeier
  • Patent number: 5649440
    Abstract: A method of calibrating and orienting forming rollers of an Assel-type rolling mill, and more particularly, of calibrating an Assel mill for rolling thin-walled tubes of pre-pierced hollow bodies about a mandrel, using at least three generally conical rollers that are circumferentially spaced about the mandrel. The orientation of each forming roller is adjusted so as to position the roller inclination relative to the mandrel axis of roll by an expansion angle .alpha. of approximately 7.degree. to 30.degree.. Each forming roller is also adjustably oriented so that its smoothing part relative to the mandrel axis of roll defines a transport angle .gamma. of approximately 7.degree. to 17.degree.. In further accordance with this invention, each forming roller is configured so as to have an opening angle .beta. of approximately 4.degree. to 15.degree..
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: July 22, 1997
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Gheorghe Arnautu, Karl Heinz Hausler, Jurgen Pietsch, Gunther Voswinckel, Karl-Helmut Wengenroth
  • Patent number: 5644938
    Abstract: In a method and a roll stand for diagonal rolling of medium or thin-walled tube ingots, an inner mandrel rod is held at an inlet side and controllably axially displaceably relative to rolls. In order to avoid a funnel-shaped expansion at the tube ingot end, the rolling product during rolling is rolled in a constriction of the mandrel rod and thereby obtains a thickened wall forming a support of the tube ingot wall against the expansion.
    Type: Grant
    Filed: August 11, 1995
    Date of Patent: July 8, 1997
    Inventors: Hermann Moeltner, Karlhans Staat
  • Patent number: 5642638
    Abstract: The invention relates to a process for reducing the outside diameter and wall thickness by rolling a cylindrical hollow ingot the front part of which is fed into an Assel rolling mill, in which connection, in front of the Assel rolling mill as seen in the direction of feed, a device is provided for reducing the diameter and/or wall thickness of the rear end part of the hollow ingot threaded onto a mandrel rod. In this process, the prereduction rolls are slowly and continuously pressed against the ingot at a predetermined point near the end of the ingot to produce a conically reduced end portion.
    Type: Grant
    Filed: August 24, 1995
    Date of Patent: July 1, 1997
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Jurgen Pietsch, Ingo Baade
  • Patent number: 5526663
    Abstract: A device for grooving the internal surface of tubes is disclosed as including a holding die for holding in position inside the tube a floating chuck equipped with a grooved chuck and a grooving unit including a rotating cage for retaining a number of rotating balls for compressing the tube wall against the grooved chuck to form a groove in the tube. The grooving unit includes a finishing die. The rotating cage includes a supporting member of which the internal profile, in an axial section is an arc of a circle, and a cage closure plate for retaining the balls in the cage and further includes a lubricator for the interior of the cage.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: June 18, 1996
    Assignee: Trefimetaux
    Inventors: Jean-Louis Sauvonnet, Franck Delavaquerie
  • Patent number: 5524467
    Abstract: The invention relates to a method for the better utilization of the working width of a profiling stone in the inner profiling of heat exchanger pipes. The press on width of the revolving roller bodies is substantially narrower than the profile width of the profiling stone so that in this area the profiling stone is worn out rapidly while the other area remains unworn since it is not utilized. In order to avoid this, the invention suggests that the press on rollers and the profiling stone is moved within the range of the working width of the profiling stone axially back and forth so that the entire profile range of the profiling stone can be utilized.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: June 11, 1996
    Assignee: Schumag Aktiengesellschaft
    Inventor: Walter Wetzels
  • Patent number: 5471858
    Abstract: The well-known Grob cold forming machine for carrying out the Grob method of impact roll-shaping utilizes rolling head carriers that move toward and away from the workpiece wherein each rolling head carrier is provided with rotatably driven rolling heads. Journalled in the rolling heads are impact formers or rollers which, during rotation of the rolling head, within their circle of rotation perform single forming steps on the workpiece which is mounted on a mandrel. In addition, each rolling head carrier carries a freely rotatably journalled pressure roll having an axis parallel to or angled relative to the mandrel axis, the pressure roll being located outside the rotational circle of the impact former. Via the use of pressure rolls, mainly axial shaping is achieved and thereafter, via the use of the impact former, mainly radial shaping is achieved in the same set-up and on the same mandrel.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: December 5, 1995
    Assignee: Ernst Grob AG
    Inventor: Daniel Deriaz