Explosively Shaping Patents (Class 29/421.2)
  • Patent number: 9731340
    Abstract: A process monitoring method for a joining operation of a joining element at a speed of at least 5 m/s, in particular placing a bolt at least 10 m/s into at least one component with the aid of a placing device which has the following features: A plunger for placing the joining element, a buffer which limits a maximum deflection of the plunger in the joining direction, and a distance measurement with which the deflection of the plunger can be detected, wherein the process monitoring comprises the following steps: Detecting the travel of the plunger during the joining operation as a function of time in the form of a distance-time curve, detecting a placement of the plunger on the buffer, evaluating the distance-time curve such that, in the presence of at least one maximum followed by at least one minimum in the distance-time curve and without the plunger contacting the buffer, a joint connection is judged to be OK.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: August 15, 2017
    Assignee: Böllhoff Verbindungstechnik GmbH
    Inventors: Torsten Draht, Adnan Kolac
  • Patent number: 9636736
    Abstract: The invention is intended to improve a method for explosive forming of a workpiece by means of gas explosion, in which the workpiece is arranged in a intake area of a moulding tool, wherein the intake area is at least partially filled with liquid and the explosion is triggered by ignition of an explosive gas mixture, to the effect that the method is suitable and simplified for mass production. This object is solved by a method for explosive forming of a workpiece by means of gas explosion, in which the workpiece is arranged in a intake area of a moulding tool, wherein the intake area is at least partially filled with liquid and the explosion is triggered by means of ignition of an explosive gas mixture, in which the explosive gas mixture is provided at least partially above the surface of the liquid before the ignition.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: May 2, 2017
    Inventors: Alexander Zak, Seetarama S. Kotagiri, Andreas Stranz, Philipp Stoeger
  • Patent number: 9375775
    Abstract: A hydromechanical forming tool is disclosed that may include electro-hydraulic forming chambers in which a stored charge circuit may be discharged through electrodes to improve the level of detail that may be formed in a blank. The hydromechanical forming tool may include a liquid chamber at the entrance to the draw chamber to reduce friction, as the blank is drawn into the draw chamber. The draw chamber may have a movable bottom wall that is moved in tandem with the punch to reduce the amount of liquid in the draw chamber and reduce the need to pump liquid into and out of the draw chamber during a hydromechanical forming tool cycle.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: June 28, 2016
    Assignee: Ford Global Technologies, LLC
    Inventor: Sergey Fedorovich Golovashchenko
  • Patent number: 8966950
    Abstract: A method of reinforcing a part formed from a sheet metal panel that has a predetermined area that requires reinforcement by forming a grid pattern of V-shaped channels in the predetermined area. The grid pattern may be formed by wire electrodes in an electro-hydraulic forming tool having a one-sided die. Alternatively, the grid pattern may be formed by a plurality of electrodes that are arranged in an array that is aligned in at least two directions on the opposite side of the part from the one-sided die.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: March 3, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Sergey Fedorovich Golovashchenko, John Joseph Francis Bonnen
  • Patent number: 8931319
    Abstract: Apparatus and methods are disclosed whereby a propellant driven water stream is used in the formation of materials made from high tensile strength alloys. High pressure developed in liquid flowing through a tubular work piece is employed to achieve desired forms. The high pressure results from superposition of compression waves generated in the course of the impact of the liquid by products of propellant combustion.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: January 13, 2015
    Assignee: New Jersey Institute of Technology
    Inventors: Ernest Samuel Geskin, Krzysztof Kluz
  • Patent number: 8919696
    Abstract: A method for stiffening a skin field of an aircraft fuselage includes providing a skin field for an aircraft fuselage, manufacturing an integral lattice-shaped stiffening structure including a plurality of longitudinal stiffeners and connecting the stiffening structure to the skin field. The manufacturing can include the use of a tool mold having a plurality of longitudinal recesses configured to form longitudinal stiffeners and a plurality of sunken areas disposed between the longitudinal recess. The sunken areas are configured for forming respective mounts that are configured for connection to circumferential stiffeners.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: December 30, 2014
    Assignee: Airbus Operations GmbH
    Inventors: Georg Lonsdorfer, Hauke Seegel, Klaus Rode, Andreas Pau, Hartmut Herter, Kevin Danke
  • Patent number: 8844331
    Abstract: A system for electro-hydraulically forming a sheet metal part in an electro-hydraulic forming (EHF) machine. The part in a first shape is placed in the EHF machine between a one-sided forming die and a chamber that is filled with a liquid. An electrode is discharged in the chamber to form the part toward the forming die. The electrode is advanced within the chamber toward the part and a subsequent discharge is provided in the chamber to form the part. A gap discharge EHF machine and a wire discharge EHF machine may be used in the system.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: September 30, 2014
    Assignee: Ford Global Technologies, LLC
    Inventor: Sergey Fedorovich Golovashchenko
  • Patent number: 8713982
    Abstract: The invention relates to a device for explosive forming of workpieces, comprising an ignition chamber and an ignition mechanism, wherein an explosive agent can be ignited at an ignition location in the ignition chamber using the ignition mechanism, and an ignition chamber outlet is provided, to be improved such that the ignition mechanism has a longer service life. The aim is achieved by a device wherein an impact breaker is provided in the propagation path (37) of the detonation wave.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: May 6, 2014
    Assignee: Magna International Inc.
    Inventors: Andreas Stranz, Alexander Zak
  • Patent number: 8650921
    Abstract: With the invention, a method and device for explosive forming of work pieces, in which at least one work piece is arranged in at least one die and deformed by means of an explosive to be ignited, is to be improved, in that an ignition mechanism that is technically simple to handle, is produced with the shortest possible setup time, which permits the most precise possible ignition of the explosive with time-repeatable accuracy. This task is solved by a method and device, in which at least one work piece is arranged in at least one die and deformed by means of an explosive to be ignited, in which the explosive is ignited by means of induction.
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: February 18, 2014
    Assignee: Cosma Engineering Europe AG
    Inventors: Andreas Stranz, Alexander Zak
  • Patent number: 8499429
    Abstract: In a method for applying a surface structure to a solid body, a structured surface is placed directly or indirectly onto the surface of the solid body and the structure of this structured surface is reproduced in the surface of the solid body, in that an explosive structured layer is arranged on the surface of the solid body and the structure of the explosive structured layer is explosively disseminated into the surface of the solid body. According to the invention, the surface of the solid body is provided with a surface pre-structure before the actual dissemination, at least in regions, wherein the structure of the explosive structured layer is disseminated on at least one partial region of the surface pre-structure so that the surface structure produced results from overlapping of the surface pre-structure with the explosively disseminated structure.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: August 6, 2013
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Günter Helferich, Lars Ziegler, Peter Elsner, Thomas Keicher, Peter Eyerer, Bernd Bader, Helfried Urban, Christian Anselment, Andreas Happ, Wolfgang Merz
  • Patent number: 8499599
    Abstract: A laser nanoforming system and method for forming three-dimensional nanostructures from a metallic surface. A laser beam is directed to hit and explode an ablative layer to generate a shockwave that exerts a force on the metallic surface to form an inverse nanostructure of an underlying mold. A dry lubricant can be located between the metallic surface and mold to reduce friction. A confinement layer substantially transparent to the laser beam can confine the shockwave. A cushion layer can protect the mold from damage. A flyer layer between the ablative layer and metallic surface can protect the metallic surface from thermal effects of the exploding ablative layer. The mold can have feature sizes less than 500 nm. The metallic surface can be aluminum film. The dry lubricant can be sputtered Au—Cr film, evaporated Au film or a dip-coated PVP film or other dry lubricant materials.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: August 6, 2013
    Assignee: Purdue Research Foundation
    Inventors: Gary J. Cheng, Huang Gao, Yingling Yang
  • Publication number: 20130186873
    Abstract: A method of riveting two metal parts through a hole with an electro-hydraulic riveting tool. The electro-hydraulic riveting tool includes a tube that is inserted in the hole and an electrode that is inserted within the tube. A liquid is contained within the tube and the electrode is immersed in the liquid. A stored charge is discharged through the electrode to create a shockwave within the fluid that forms the tube into a rivet structure and creates solid state weld between the rivet flanges and the parts that are joined.
    Type: Application
    Filed: January 19, 2012
    Publication date: July 25, 2013
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventor: Sergey Fedorovich Golovashchenko
  • Patent number: 8459078
    Abstract: Apparatus and methods are disclosed whereby a propellant driven water stream is used in the formation of materials made from high tensile strength alloys. High pressure developed in liquid flowing through a tubular work piece is employed to achieve desired forms. The high pressure results from superposition of compression waves generated in the course of the impact of the liquid by products of propellant combustion.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: June 11, 2013
    Assignee: New Jersey Institute of Technology
    Inventors: Ernest Samuel Geskin, Krzysztof Kluz
  • Patent number: 8322175
    Abstract: It shall be achieved by the invention that a workpiece for an explosion forming process, which can be inserted into a forming tool and which can be deformed from an initial shape by means of explosion forming, and the explosion forming method are improved such that a satisfactory quality of the workpiece with the desired wall thickness is achieved in a simple manner. This object is achieved by a workpiece and a respective explosion forming method in which the initial shape of the workpiece has at least in some portions a supply of material for the explosion forming process, which is pre-formed compared to adjoining portions or which is provided therewith.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: December 4, 2012
    Assignee: Cosma Engineering Europe AG
    Inventors: Philipp Stoeger, Alexander Zak
  • Patent number: 8257050
    Abstract: Peening provides compression of component surfaces in order to create residual surface compressions to resist crack propagation in components such as aerofoils. Previously peening techniques have had problems with respect to achieving adequate treatment depths, speed of treatment and with respect to effectiveness. By the present method arrangement an electrical conductor in the form of a wire is subject to electrical pulses to cause evaporation and subsequent breakdown with high power ultrasound (HPU) propagation in a volume of dielectric fluid towards a component and so peening. The electrical conductor ensures that there is limited possibility of electrical discharge to the component surface while the positioning of the wire relative to the surface can be adjusted to achieve best effect particularly if reflector devices are utilized to concentrate (HPU) pulse presentation to the component.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: September 4, 2012
    Assignee: Rolls-Royce PLC
    Inventors: Igor Timoshkin, Scott J. MacGregor
  • Patent number: 8250892
    Abstract: Through the invention, a closure device for explosive forming with a connection unit movable relative to the explosive forming die between a working position on the die and a rest position is to be configured, so that the explosive forming die can be closed in simple and reliable fashion and, at the same time, the explosion forces supported. This task is solved by a closure device, in which a wedge structure is guided to move on a static holding structure and is motion-coupled to the connection unit, the resulting movement of the connection unit being directed across the movement of the wedge structure.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: August 28, 2012
    Assignee: Cosma Engineering Europe AG
    Inventors: Alexander Zak, Valentine Flitsch, Andreas Stranz
  • Publication number: 20110099784
    Abstract: A method for applying a surface structure to a solid body, wherein a structured surface is placed directly or indirectly onto the surface of the solid body and the structure of this structured surface is reproduced in the surface of the solid body, in that an explosive structured layer having the structured surface is arranged on the surface of the solid body and in that the structure of the explosive structured layer is disseminated by ignition of the same in the surface of the solid body; and/or at least one moulded structured layer having the structured surface is arranged on the surface of the solid body and is disseminated in the surface of the solid body by igniting a separate explosive layer, According to the invention the surface of the solid body is provided with a surface pre-structure before the actual dissemination, at least in regions, wherein the structure of the explosive structured layer or the moulded structured layer is disseminated on at least one partial region of the surface pre-struc
    Type: Application
    Filed: June 16, 2009
    Publication date: May 5, 2011
    Inventors: Helferich Günter, Lars Ziegler, Peter Elsner, Thomas Keicher, Peter Eyerer, Bernd Bader, Helfried Urban, Christian Anselment, Andreas Happ, Wolfgang Merz
  • Patent number: 7827838
    Abstract: A tooling method for calibrating a partially formed metal part in an electro-hydraulic forming tool. The method includes loading a partially formed metal part onto a forming surface of a die. The part is then clamped onto the forming surface and the part is pulsed with a high rate energy pulse to overcome a spring-back effect in the part. The EHF calibration tool includes a punch to which a part is held by clamps while a capacitive discharge circuit is discharged through electrodes provided in the tool. Upon discharge of the capacitive discharge circuit through the electrodes, a high rate energy pulse is applied through a liquid to calibrate the part.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: November 9, 2010
    Assignee: Ford Global Technologies, LLC
    Inventor: Sergey Fedorovich Golovashchenko
  • Patent number: 7802457
    Abstract: An electrohydraulic forming (EHF) tool and a method of forming a sheet metal blank in an EHF operation. The tool may include a pair of electrodes and may be filled with a liquid. A high voltage discharge may be produced between the electrodes in a manner that induces a shockwave within the fluid. The shockwave may produce sufficient force within the liquid to form the blank against a die.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: September 28, 2010
    Assignee: Ford Global Technologies, LLC
    Inventors: Sergey Fedorovich Golovashchenko, Alan John Gillard, Douglas Piccard, Andrey M. Ilinich
  • Patent number: 7752728
    Abstract: A material composite has a part made from steel or a titanium-based material and a part made from a copper-based or aluminum-based material. The parts of the material composite are joined by way of an intermediate piece. The intermediate piece likewise comprises a region made from steel or a titanium-based material and a region made from a copper-based or aluminum-based material, which are connected by explosion welding. The parts of the material composite are connected to the regions of the intermediate piece which are in each case of the same type by means of a fusion or diffusion welding process.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: July 13, 2010
    Assignee: Plansee SE
    Inventors: Bertram Schedler, Thomas Huber, Thomas Friedrich, Karlheinz Scheiber, Dietmar Schedle, Anton Zabernig, Hans-Dieter Friedle, Sandra Mair, Nadine Wörle
  • Publication number: 20090272168
    Abstract: An electrohydraulic forming (EHF) tool and a method of forming a sheet metal blank in an EHF operation. The tool may include a pair of electrodes and may be filled with a liquid. A high voltage discharge may be produced between the electrodes in a manner that induces a shockwave within the fluid. The shockwave may produce sufficient force within the liquid to form the blank against a die.
    Type: Application
    Filed: May 5, 2008
    Publication date: November 5, 2009
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Sergey Fedorovich Golovashchenko, Alan John Gillard, Douglas Piccard, Andrey M. Ilinich
  • Patent number: 7093470
    Abstract: Methods for making skin panels suitable for use in aircraft structures and fuel tank structures, such as fuselages and reusable launch vehicle propellant tanks. A first method includes the following steps: machining a starting plate to a final part geometry; and explosive forming the machined plate to at least one of a uniaxial curvature and a biaxial curvature. A second method includes the following steps: explosive forming a starting plate to at least one of a uniaxial curvature and a biaxial curvature; and machining the curved plate to a final part geometry. Accordingly, the invention enables making integrally stiffened unitized axial load carrying skin panels that are either uniaxially or biaxially curved.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: August 22, 2006
    Assignee: The Boeing Company
    Inventor: Sami M. El-Soudani
  • Patent number: 6907652
    Abstract: A method of connecting a first pipe to a second pipe having an end part fitting into an end part of the first pipe, comprising arranging the end part of the second pipe within the end part of the first pipe, arranging a sleeve of a deformable material between said end parts, and radially expanding the end part of the second pipe towards the end part of the first pipe so as to bias the sleeve between said end parts.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: June 21, 2005
    Assignee: Shell Oil Company
    Inventor: Wilhelmus Hubertus Paulus Maria Heijnen
  • Patent number: 6591649
    Abstract: An apparatus for forming a generally planar metal plate into a dish with a three-dimensional pattern is provided. The apparatus comprises a mold having a forming surface with a contour corresponding to said three-dimensional pattern, and having edges corresponding to boundaries of the dish, which edges are defined by side walls essentially perpendicular to the forming plane; a forming device comprising a fluid basin and pairs of electric discharge members within the fluid and having an opening facing the mold to allow transmission of a pressure wave from the fluid to the metal plate; and an electric discharge circuitry for discharging a short and intense electric current through the pairs of electric discharge members generating an electric spark or breakdown within the fluid to yield formation of plasma, vapor or both.
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: July 15, 2003
    Assignee: Pulsar Welding Ltd.
    Inventors: Oren Gafri, Yuri Livshiz
  • Patent number: 6301766
    Abstract: Methods and apparatus employing an ultra high-pressure fluid pulse to perform metal working operations, including joining and cold working. In one application, an ultra high-pressure fluid pulse is directed into a hollow rivet that is seated within an orifice formed in two metal sheets, causing the fastener to expand outwardly, in an interference fit with the orifice that joins the metal sheets together. The ultra high-pressure fluid pulse can alternatively be applied to the metal sheets to plastically deform them into a cavity to form a clinch fastener joint. Further, the ultra high-pressure fluid pulse is usable to plastically deform the interface between stacked metal sheets or other components into surface features that are provided on one of the sheets, to form a mechanical interlock.
    Type: Grant
    Filed: January 11, 1999
    Date of Patent: October 16, 2001
    Assignee: Tempress Technologies, Inc.
    Inventor: Jack J. Kollé
  • Publication number: 20010010854
    Abstract: An aluminum-thermoplastic composite surface structure. A sheet of aluminum is formed to a single-sided mold by heating the sheet and applying a ramp of gas pressure. A thermoplastic resin is heated and microballons are added to the resin to lower the viscosity of the resin, which is applied through a nozzle in a hexagonal pattern on the formed aluminum sheet. Upon cooling, the composite resin forms a honeycomb pattern. The hexagonal pattern transitions to a columnar pattern and a backing layer of aluminum sheet is gas pressure formed to the resin composite. Gas forming of the aluminum sheet results in aspect ratios of up to 0.6, and the sheet maintains a clean surface that bonds to the applied resin.
    Type: Application
    Filed: April 3, 2001
    Publication date: August 2, 2001
    Inventor: Loren C. Hillier