Preventing Distortion Patents (Class 72/701)
  • Patent number: 8529708
    Abstract: A method for making armor plate that is resistant to armor piercing small arms ammunition is provided. The armor plate includes a steel plate having a nominal chemical composition in weight percent of 0.4C-1.8Ni-0.8Cr-0.25Mo. The steel plate is carburized on one side and produces a carburized side and a non-carburized side. The carburized side of the steel plate has a carbon concentration of at least 0.9% by weight and the non-carburized side has a carbon concentration of between 0.38 and 0.45% by weight. After the steel plate has been carburized, it is subsequently thermally processed such that the carburized side has a hardness of at least 58 Rockwell Hardness C (HRC), and the non-carburized side has a hardness of between >=50 and <=55 HRC.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: September 10, 2013
    Inventor: Jay Carl Locke
  • Patent number: 8511132
    Abstract: The invention relates to a bending press (1), in particular a press brake (2), for producing workpieces (3) by bending between a bench beam (11) equipped with at least one bending tool (4) disposed in a stationary arrangement on a machine frame (5) and a pressing beam (14) equipped with at least one bending tool (4) which can be displaced relative to the bench beam (11) in linear guides (13) of the machine frame (5) by means of at least one drive means (19) secured to a support bearing device (25). The support bearing device (25) is provided in the form of at least one mounting plate for at least one drive means (19). The latter constitutes a mounting ring for the drive means (19), some regions of which are provided with orifices or peripheral recesses surrounding the mounting ring and weakened zones (38) are provided in the pressing beam (14).
    Type: Grant
    Filed: October 12, 2009
    Date of Patent: August 20, 2013
    Assignee: TRUMPF Maschinen Austria GmbH & Co. KG.
    Inventors: Rainer Burgstaller, Egon Danninger
  • Patent number: 7594420
    Abstract: The present invention is a novel machine for repairing damaged wheel rims whereby pressure is applied to a damaged rim from a plurality of pressure applicators, and whereby all of the pressure applicators may be used without impairing the sightline of the user.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: September 29, 2009
    Inventor: Brian Len
  • Patent number: 6799450
    Abstract: A method of stretch forming an aluminum metal sheet that includes the steps of placing an aluminum metal sheet in a hot forming tool, forming a shaped part at an elevated temperature, removing the hot shaped part from the forming tool, and thereafter transferring the hot shaped part to a cooling fixture. The transfer and removal steps are performed at a speed that is variable based on a correlation of the temperature and strength of the aluminum metal sheet and the speed at which the hot shaped part may be transferred without distortion of its shape due to inertia.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: October 5, 2004
    Assignee: General Motors Corporation
    Inventors: Nelson T. Brinas, Edward Frank Ryntz
  • Patent number: 6675626
    Abstract: A press forming process involves a stretching press to form a product with a curved portion from a workpiece by imparting a pad portion to the workpiece prior to starting the press forming process. The curved portion is prepared by spreading the pad portion mainly into the longitudinal direction of the workpiece, so that the curved portion is prepared so as to have a spring back of the product minimized.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: January 13, 2004
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Kenichi Arai
  • Patent number: 6598296
    Abstract: A method for manufacturing a wheel rim for a two-piece vehicle wheel assembly. The method includes the step of providing a one-piece alloy wheel form defining an integrally-formed annular rim blank and a rigidifying flange. The rim blank includes first and second edge portions. At least one of the first and second edge portions of the rim blank is shaped. After the shaping step, the one-piece wheel form is cut to separate the shaped wheel rim from the rigidifying flange.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: July 29, 2003
    Inventor: Larry C. Smyth
  • Patent number: 6477879
    Abstract: In a prior art roller type processing apparatus for processing a workpiece by roll pressing a roller, the roller is roll-pressed at the same location a number of times. Thus, longer processing time is required compared to processing using pressing dies. It is, accordingly, an object of the present invention to reduce the processing time by providing a roller type processing apparatus. Therefore, in the present invention, rollers 13, 14 are attached to a plurality of independently controllable robot arms 11, 12, respectively, and the rollers 13, 14 are successively roll-pressed along a portion to be processed We of a workpiece W in different rolling positions.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: November 12, 2002
    Assignee: Tri Engineering Company Limited
    Inventor: Masazumi Sawa
  • Patent number: 6374658
    Abstract: This invention relates to a bending press for bending metal foils, comprising a mobile panel and a fixed panel. The fixed panel comprises two slots open on the lateral faces of the lower panel and symmetrical with respect to the transverse median plane of this fixed panel. The bottom of each slot is formed by the inner wall of a through bore made in the lower panel which extends over an angle close to 360°, in order to distribute the stresses due to the bending over a broader area. A safety stop is provided in the opening of each slot in order to limit the vertical displacement of the ends of the upper part of the lower panel.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: April 23, 2002
    Assignees: Amada Europe, Amada Co., Ltd.
    Inventors: Eric Gascoin, Olivier Bouchentouf, Koji Shima
  • Patent number: 5666849
    Abstract: Sliced workpieces severed from a metal extrusion transversely of it and into a desired thickness, or bent ones made from the extruded metal pipes, are restrained at their regulated correct positions each in its entirety or in part. Subsequently, the workpieces are compressed in a direction to the thickness or in the direction perpendicular to the primary bending direction. Plastic deformation of or exceeding 0.5%, or more preferably 2-5%, will be produced in each workpiece. Alternatively, those sliced or bent workpieces may be pressed in a direction to that of thickness or in the direction perpendicular to a previous bending, after each workpiece is restrained in its entirety or in part at the regulated correct dimension.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 16, 1997
    Assignees: Honda Giken Kogyo Kabushiki Kaisha, Showa Aluminum Corporation
    Inventors: Yasushi Nakazawa, Masayoshi Ohashi, Yasushi Tashiro, Tadashi Yasuoka, Akio Sugiura
  • Patent number: 5347840
    Abstract: A materials press comprising a press table and a sliding table. The contact surfaces between the press table and the sliding table have surface contours which conform to a bending line which would occur in a planar press table when it is placed under a load.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: September 20, 1994
    Assignee: L. Schuler GmbH
    Inventors: Michael Wolfgang, Lauke Andreas, Fritz Werner
  • Patent number: 5303573
    Abstract: Aluminum automobile wheels are straightened by exerting gentle pressure on the wheel to urge the wheel back to its original shape. If the metal does not move under pressure, the wheel is heated, and pressure again exerted, the process continuing until the wheel becomes round. A C-shaped wheel mount carries a spindle which mounts a hub. The hub rigidly receives the wheel, and the hub is selectively rotatable, and the wheel mount is selectively rotatable about a horizontal axis. The wheel is gently brought back to shape without excess heat or excess working to damage the metal. A final metal spinning step relieves stresses in the metal and brings the wheel to final tolerances.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: April 19, 1994
    Assignee: Wheel Wizard International, Inc.
    Inventor: Thomas E. Douglas
  • Patent number: 4949565
    Abstract: A straightening method particularly for an elongated metal member having a long longitudinally linear length, is carried out by an automatic straightening apparatus by the manner of preliminarily setting a plurality of points at which distortion are to be straightened. When it is required to straighten an amount of distortion to be straightened at a certain point, the amount is adjusted in consideration of the amounts of strains to be straightened at the other points by utilizing the method of least squares so that the elongated metal member has substantially a linearly straight shape. According to this manner, the amounts of the respective points of the long member to be straightened are adjusted. The distortion of the elongated metal member can thus be substantially straightened to a highly improved accuracy.
    Type: Grant
    Filed: March 30, 1989
    Date of Patent: August 21, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobukazu Kodera, Takeo Kakuti
  • Patent number: 4805439
    Abstract: A work following device for controlling the movement of the free portion of a work during a press working process such as a bending press working process to prevent the free portion of the work from warping due to the inertia thereof in the final stage of the press working process and for restoring the work to its initial position after the same has been pressed.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: February 21, 1989
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Shigeo Kobayashi, Osamu Yoshida, Haruo Saito, Tsutomu Shigeta, Hiroshi Nara, Shinji Abe, Kiyoharu Yamamoto
  • Patent number: 4637961
    Abstract: The disclosure relates to a novel shell such as used in the manufacture of can ends, and to a method and tools for making such a shell. A non-circular blank having rounded corners is cut from thin metal. The blank is oblong in a direction transverse to the grain of the metal. A first set of tools separates the blanks and forms a substantially flat central panel and an upward-extending chuck wall about the edge of the panel to produce a partially formed shell. The junction area between said panel and said chuck wall has a relatively large radius of curvature at this time. A second set of tools forms in the blank a lip extending outward from the upper end of the chuck wall and generally parallel to said panel; then the panel and the chuck wall are separately gripped, followed by relative movement between the panel and the chuck wall while wrapping the junction area around a forming punch to form a panel wall in said junction area extending upward from the inner part of said chuck wall.
    Type: Grant
    Filed: August 22, 1985
    Date of Patent: January 20, 1987
    Assignee: Dayton Reliable Tool & Mfg. Co.
    Inventors: Henry C. Bachmann, Omar L. Brown, Ermal C. Fraze, David K. Wynn, James R. Gregg
  • Patent number: 4630537
    Abstract: A method and apparatus for embossing characters on a plate such as a motor vehicle registration plate are provided according to which the blank plate and dies are located between the movable and stationary members of a press, the movable member being contained in a cylinder wherein pressurized fluid can cause it in the nature of a piston to move towards the stationary member in order to effect the embossing operation on the plate.
    Type: Grant
    Filed: August 22, 1985
    Date of Patent: December 23, 1986
    Assignee: The National Savings & Finance Corp. (Proprietary) Limited
    Inventor: David J. Pretorius
  • Patent number: 4589836
    Abstract: Hydraulic press including a frame with platens, at least one of which is carried or formed by a pressure plate structure adapted for transferring pressing force to an object between the platens, which press is adapted such that the pressure plate structure is substantially carried solely by horizontally adjustable supports mounted between the defining outer edges of such plate structure, such supports being positionally adjustable such that the surface of the corresponding platen assumes a predetermined shape during the pressing operation. The press suitably includes a mechanical mechanism for effecting the horizontal displacement in order to gain the desired positional adjustment of the supports.
    Type: Grant
    Filed: June 2, 1985
    Date of Patent: May 20, 1986
    Assignee: Fjellman Press AB
    Inventor: Bo Fjellman
  • Patent number: 4485662
    Abstract: A tool is disclosed for adjusting the suspension struts in vehicles, in order to correct wheel camber. A web is bolted to the lug bolts corresponding to the strut being adjusted. A first hydraulically actuated ram is connected to the web and to a portion of the strut, while a second such ram, which pushes in a direction opposite to the first, is connected to a chain which is in turn connected to another portion of the strut. The operator applies hydraulic pressure to the rams, which push and pull on the strut until a predetermined deflection is achieved. Because the rams act on the web in directions opposite to each other, and in approximately the same plane, the forces acting on the web are substantially cancelled, and little force is thereby placed on the lug bolts of the vehicle, which might otherwise deform or destroy the wheel bearings.
    Type: Grant
    Filed: November 4, 1982
    Date of Patent: December 4, 1984
    Inventor: Voyd H. Justice
  • Patent number: 4464920
    Abstract: Disclosed is a roller forming machine for converting a flat metal strip into a louver having long, narrow fins that extend lengthwise of the strip and are all bent laterally in one direction oblique to the plane of the strip. The fins are produced by a pair of fin forming rollers which slit the strip and bend out the fins to a larger acute angle to the plane of the strip than is desired in the finished louver. The strip then tends to twist along its length due to asymmetrical residual stresses generated by fin formation. To remove the twist, the strip is passed between cylindrical straightening rollers whereby the fins are bent partway back towards coplanarity with the strip, thus generating new residual stresses which oppose the original ones due to fin forming. One straightening roller is adjustable towards and from the other so that said new residual stresses can be empirically brought into equilibrium with the original ones.
    Type: Grant
    Filed: October 27, 1982
    Date of Patent: August 14, 1984
    Assignee: Artos Engineering Company
    Inventors: Herbert M. Stoehr, John J. Toben
  • Patent number: 4449623
    Abstract: A balustrade for use with passenger conveyors including a second deck member bent to assume an arcuate shape at landings, and having a U-shaped cross-section adapted to be opened facing the center of the arc, and deformation preventing strips formed by bending the second deck member adjacent its opening which defines an inner periphery of the arcuate-shaped sections of the second deck member.
    Type: Grant
    Filed: February 10, 1983
    Date of Patent: May 22, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Chuichi Saito, Katsuya Teranishi, Katsuyoshi Baba, Yoshihiro Osumi
  • Patent number: 4273232
    Abstract: A balustrade for use with passenger conveyors including a deck member bent to assume an arcuate shape at landings and having a U-shaped cross-section with its opening facing the center of the arc, said deck member being formed adjacent the opposite ends of said first arcuate-shaped portion with second arcuate-shaped portions of larger radius of curvature than that of the first arcuate-shaped portion, said deck member being inwardly folded down about the opening of the arcuate-shaped portions to provide deformation preventing strips.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: June 16, 1981
    Assignee: Hitachi, Ltd.
    Inventors: Cyuichi Saito, Katsuya Teranishi
  • Patent number: 3966260
    Abstract: A nondriven axle suitable for use on trailers, trucks and the like is strengthened by plastically deforming at least a portion of the axle beam to form residual stresses in the axle beam which will resist loads impressed on the axle by the vehicle.
    Type: Grant
    Filed: January 7, 1975
    Date of Patent: June 29, 1976
    Assignee: Eaton Corporation
    Inventor: Eugene R. Braun