Crankshaft Making Apparatus Patents (Class 29/6.01)
  • Patent number: 10166595
    Abstract: A rolling tool for the roller finishing of bearing surfaces of a crankshaft is pivotable around a crankshaft axis, with a finishing roller head and with a support roller head. In order to prevent damage to the guide mechanisms, the roller finishing roller is guided on all sides in a roller cage and the finishing roller head has a frame wherein it is mounted pivotably around a first pivot axis which is perpendicular to the crankshaft axis and parallel to a tangent on a working side of the roller finishing roller. Additionally or alternatively, the support roller head comprises a support roller frame in which the support roller housing is mounted pivotably around a second pivot axis perpendicular to the crankshaft axis and parallel to the first pivot axis, and around a third pivot axis perpendicular to the crankshaft axis and perpendicular to the first pivot axis.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: January 1, 2019
    Assignee: HEGENSCHEIDT-MFD GmbH & CO. KG
    Inventors: Alfred Heimann, Jandrey Maldaner
  • Patent number: 10124398
    Abstract: A method for producing a forged crankshaft includes a die forging step, a trimming step, and an excess projecting portion bending step. The die forging step forms a finish forged blank with flash, the finish forged blank including a shape of the crankshaft, in which crank arms have excess projecting portions at outer peripheries of side portions thereof near a crank pin, the excess projecting portions projecting from the outer peripheries. The trimming step removes the flash from the finish forged blank formed in the die forging step. The excess projecting portion bending step bends the excess projecting portions of the crank arms toward a journal-side surface of the crank arm by pressing the crankshaft using a pair of first dies, the crankshaft being obtained by removing the flash in the trimming step.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: November 13, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kenji Tamura, Junichi Okubo, Koichiro Ishihara, Ken Yoshino, Kunihiro Yabuno, Hiroyuki Kurokawa, Tomohisa Yamashita, Sho Takamoto
  • Patent number: 10058912
    Abstract: A method for producing a forged crankshaft includes a die forging step, a trimming step, and an excess projecting portion bending step. The die forging step forms a finish forged blank with flash, the finish forged blank including a shape of the crankshaft, in which crank arms have excess projecting portions at outer peripheries of side portions thereof near a crank pin, the excess projecting portions projecting from the outer peripheries. The trimming step removes the flash from the finish forged blank formed in the die forging step. The excess projecting portion bending step bends the excess projecting portions of the crank arms toward a journal-side surface of the crank arm by inserting a first die having a U-shape from a direction of eccentricity of the crank pin to the crankshaft obtained by removing the flash in the trimming step.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: August 28, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kenji Tamura, Junichi Okubo, Koichiro Ishihara, Ken Yoshino, Kunihiro Yabuno, Hiroyuki Kurokawa, Tomohisa Yamashita, Sho Takamoto
  • Patent number: 9884361
    Abstract: A method for producing a shaft, in particular a balance shaft, crankshaft and the like, having at least one substantially annular bearing seat and at least one unbalance portion. The method includes the steps: provision of a shaft blank; formation of the at least one unbalance portion and of at least two opposite bearing seat side members by a forming process; and deformation of the at least two opposite bearing seat side members by a shell tool such that the bearing seat side members are bent together, whereby the at least one substantially annular bearing seat is formed.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: February 6, 2018
    Assignee: Hirschvogel Umformtechnik GmbH
    Inventor: Hans-Juergen Britzger
  • Patent number: 9731341
    Abstract: A forged crankshaft (1) includes a carbon steel containing S, wherein in a portion corresponding to a machined outer circumferential surface of a shaft part such as journals (J), crank pins (P), a front part (Fr), and a flange (Fl), a ratio x/y of an area rate x of sulfide in a position (X) corresponding to a parting surface of a die for finish forging to an area rate y of sulfide in a position (Y) corresponding to a bottom of a die impression of the die for finish forging is equal to or lower than 1.5. The forged crankshaft (1) can avoid an occurrence of machined surface cracks on the journals (J) and the crank pins (P) after the outer circumferential surface is machined.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: August 15, 2017
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hiroaki Tahira, Kisung Kim, Junichi Okubo
  • Patent number: 9676017
    Abstract: The invention concerns a process for roll straightening crankshafts (8, 8?) using crankshaft deep rolling tools (1 to 7), in particular work rollers (18,19) which, while the crankshaft (8, 8?) is rotated about its axis of rotation (21), are pressed into the recesses (14 to 17) or radii that delimit the bearing pins (Hi, Pi) on either side with a roll straightening force (27, 30) that constantly fluctuates around the circumference of a bearing pin (H1 to H5, P1 to P4). Roll straightening is carried out by determining the individual vector (34) of the runout by size and direction (35) at each main bearing (Hi) of the crankshaft (8, 8?).
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: June 13, 2017
    Assignee: Hegenscheidt-MFD GmbH & Co. KG
    Inventors: Hans Nolten, Heinz Josef Brunen
  • Patent number: 9545700
    Abstract: A balancing mechanism of a machine tool turret includes an accommodation housing and a balancing device. The accommodation housing includes a slide rail located at a side of the accommodation housing, a groove located at an opposing side thereof and connected with the machine tool, a driving screw located in the slide rail along a specific axis, a driving motor located top of the accommodation housing and connected with the driving screw, and a block base located in the slide rail and connected with one end of the driving screw. The balancing device is located aside to the accommodation housing with one end fixedly connected with a top side of the accommodation housing and another end extended along the specific axis perpendicular to an axis of a work piece. In a finite installation space, the balancing mechanism has the way in embedding the accommodation housing without increasing the extra volume.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: January 17, 2017
    Assignee: TAIWAN TAKISAWA TECHNOLOGY CO., LTD.
    Inventor: Chun-I Liu
  • Publication number: 20150113778
    Abstract: In order to shorten a process chain for material removing machining of a crank shaft after rough machining and after hardening a combination of circumferential turn milling as a first step and subsequent dry grinding as a second step is proposed according to the invention.
    Type: Application
    Filed: September 18, 2012
    Publication date: April 30, 2015
    Inventors: Leo Schreiber, Matthias Weber
  • Publication number: 20150107069
    Abstract: In order to prevent a subsequent imbalance of a finished crank shaft a work piece is rotated about an A-axis and a B-axis before introducing aligned centering bore holes (balanced centering) according to the invention instead of transversally offsetting the centering bore holes (geometric balancing) which is known in the art.
    Type: Application
    Filed: March 22, 2013
    Publication date: April 23, 2015
    Applicant: MAG ISA GMBH
    Inventors: Matthias Geiger, Robert Räder, Werner Mühlich, Wolfgang Hafner
  • Patent number: 8966752
    Abstract: A shaft, such as a camshaft for use in the internal combustion engine of a motor vehicle, in which the shaft includes a basic shaft body, a plurality of functional bodies, such as cams, mounted in axially spaced positions on the basic shaft body, and at least one balancing element mounted on the basic shaft body, in which the at least one balancing element is produced separately from the basic shaft body and from the functional bodies, and the functional bodies and the at least one balancing element are subsequently mounted on said basic shaft body, for example, by axial press fitting.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: March 3, 2015
    Assignee: Neumayer Tekfor Holding GmbH
    Inventors: Manfred Vogel, Matthias Derse, Matthias Bechtold, Thomas Winkler
  • Patent number: 8881352
    Abstract: A machining device for machining crankshafts has a rotationally driven disk-shaped base body with blade inserts arranged peripherally thereon. A first supply line for a cryogenic cooling medium is arranged concentrically with the axis of rotation and is thermally insulated in at least some sections. The tool has a plurality of second supply lines for the cryogenic cooling medium running across the axis of rotation and leading to the blade inserts, the second supply lines each being thermally insulated in at least some sections. A distributor unit connects the first supply line to at least one of the second supply lines for supplying the cryogenic cooling medium to at least one of the blade inserts. The cryogenic cooling medium can be conducted directly to the blade inserts which are engaged with the crankshaft that is to be machined.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: November 11, 2014
    Inventors: Moshe Israel Meidar, Wolfgang Horn, Heiner Lang, Holger H. Kolb, Paul Dieter Scharpf
  • Publication number: 20140326032
    Abstract: The invention relates to a hard-rolling roller for a deep rolling tool having a torus-shaped base body for deep rolling of radiuses or recesses which limit the bearing trunnion on crankshafts on both sides, and two at least approximately truncated cone-shaped central bodies, rising on both sides of the body. A cylindrical body rises on the upper end surface of one of the two central bodies.
    Type: Application
    Filed: July 20, 2012
    Publication date: November 6, 2014
    Applicant: HEGENSCHEIDT-MFD GMBH & CO. KG
    Inventors: Hans-Toni Steffens, Hans Zimmermann
  • Patent number: 8813358
    Abstract: In a crankshaft 200, one hole 213L formed in a crankpin 213 has a bottom surface having a larger area and a depth from a surface of the crankpin less than those of another hole 213M. In forming the hole 213L and the hole 213M, a preformed product 200 of the crankshaft having a shape smaller than that of a cavity is disposed in a die set and punches are simultaneously inserted into the crankpin 213. By this operation, the hole 213L and the hole 213M are simultaneously formed in each crankpin 213 of the preformed product 200.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: August 26, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takayuki Ohnuma, Tsutomu Ando, Yasuhiro Ito
  • Publication number: 20140230206
    Abstract: A method of manufacturing a crankshaft comprising providing two parts, each part comprising two webs, a portion of a crank journal and a portion of a main journal, welding the two portions of the crank journal together, heating the crank journal, inserting a shim between the webs, and upset forging to reduce the length of the crank journal to form a forged segment. Alternatively, the portions of the main journal may be welded, heated, shimmed, and forged to form a forged segment. The crankshaft may be lengthened by adding additional parts or forged segments using the same steps. A production line for carrying out this method when producing a crankshaft with n number of crank journals, where n is an even integer.
    Type: Application
    Filed: February 21, 2013
    Publication date: August 21, 2014
    Inventor: Dusan Milicevic
  • Publication number: 20140223708
    Abstract: In order to shorten a process chain during material removing machining of a crank shaft, after rough machining and after hardening according to the invention a combination of single point turning with subsequent tangential turning and/or finishing and/or fine dry grinding and/or electrochemical etching is proposed as a second step.
    Type: Application
    Filed: September 18, 2012
    Publication date: August 14, 2014
    Applicant: MAG IAS GMBH
    Inventors: Leo Schreiber, Matthias Weber
  • Publication number: 20140223707
    Abstract: In order to shorten a process chain for chip removing processing of a crank shaft after coarse machining and after hardening according to the invention a combination of turn milling or single point milling is proposed as a first step and a subsequent line machining step through finishing or electro chemical etching is proposed.
    Type: Application
    Filed: September 18, 2012
    Publication date: August 14, 2014
    Inventors: Leo Schreiber, Matthias Weber
  • Publication number: 20140109364
    Abstract: A method for completely machining at least unprocessed centric journals (10) and crankpin journals (11), and the respective flat shoulders (9, 10) thereof surrounding the journals, of flanged or cast blanks of a crankshaft first includes turning the flat shoulders (9) associated with the journals (10). Then, the centric journals (10) are roughly ground without the flat shoulders (9) thereof and the crankpin journals (11) are roughly ground together with the flat shoulders (12) thereof. After the journals (10, 11) have been roughly ground, an allowance remains that is smaller than an allowance required for common finish grinding of journals and flat shoulders. The rough grinding is followed by the finish grinding of the centric journals (10) and the crankpin journals (11) from the smaller allowance (23) remaining due to the rough grinding to the final dimension.
    Type: Application
    Filed: May 16, 2012
    Publication date: April 24, 2014
    Applicant: Erwin Junker Maschinenfabrik GmbH
    Inventor: Erwin Junker
  • Patent number: 8677581
    Abstract: The invention regards a deep rolling machine (2) for crankshafts (5) with several deep rolling units (3) in a scissor-type configuration that are attached to the deep rolling machine (2) in the direction of the axis of rotation (4) of the crankshaft (5) with respective lateral distances (6) one besides another in a way that they can swivel thanks to the fact that some deep rolling devices (3) are intended for the deep rolling of main bearing journals (14) and other deep rolling units (3) are intended for the deep rolling of the pin bearing journals of the crankshaft (5) and that the deep rolling units (3) carry at the outer ends of their two scissor-type arms respectively one deep roller head (11) and a supporting roller head (9) that, together, form a deep rolling tool (3) where the deep rolling tool (10) along the scissor-type arms has a distance from the fastening point of the deep rolling unit (3) to the deep rolling machine (2) that is long when compared to the ratio between the width (7) of the scissor-
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: March 25, 2014
    Assignee: Hegenscheidt-MFD GmbH & Co. KG
    Inventor: Hans J. Naumann
  • Patent number: 8627565
    Abstract: A preformed product of a crankshaft is formed in a shape smaller than a shape of a cavity of a separatable die set 1103 composed of an upper die and a lower die and is disposed in the cavity of the die set 1103 as a material M. The cavity of the die set 1103 matches a required shape of the crankshaft. When the material M is disposed in the cavity of the die set 1103, a clearance is formed between the material M and the cavity, and when a side-forming punch 1000P is inserted into the material M, a hollow hole is formed in the material M and the cavity is filled with the material M. As a result, not only can weight saving be achieved by forming the hole in the crankpin of the crankshaft, but also degradation of dimensional accuracy by forming the hole can be avoided.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: January 14, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takayuki Ohnuma, Tsutomu Ando, Yasuhiro Ito
  • Patent number: 8567025
    Abstract: A work roller (1) is detachably attached to a housing (2). The work roller (1) is positioned on a pin between a pin head (7) and a lid (20) allowing it to rotate freely, while the housing (2) provides a recess (6) for the deep rolling tool (1), a receptacle (10) for the pin head (7) and a receptacle (19) for the lid (20). The receptacle (10) for the pin head (7) is shaped like a subarea (11, 14) of a truncated cone and has a concentric collar (23) around the rotational axis (24) of the work roller (1) while the receptacle (19) for the lid (20) is shaped like a subarea (16, 17) of a circular cylinder.
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: October 29, 2013
    Assignee: Hegenscheidt-MFD GmbH & Co. KG
    Inventor: Roland Heffe
  • Patent number: 8533946
    Abstract: A crankshaft is cast in a mold to define a plurality of pin bearing journals and a plurality of main bearing journals, at least one of each has a hollow section extending therethrough. A single core is positioned within the mold to form all of the hollow sections. The single core may include a cross-section defining an elliptical shape to form hollow sections having an elliptical cross-sectional shape to further reduce the weight of the crankshaft. The hollow sections are each positioned along a path that minimizes stress within the crankshaft. The path may include a non-linear path relative to a longitudinal axis of the crankshaft or a linear path angled relative to the longitudinal axis to bend or direct the hollow sections away from high stress regions of the crankshaft. The non-circular cross section of the core may spiral about its own axis to maximize mass reduction.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: September 17, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Dale Edward Murrish, Mark Helmle, Keith Hart, Maurice G. Meyer
  • Patent number: 8468696
    Abstract: In a crankshaft 200, one hole 213L formed in a crankpin 213 has a bottom surface having a larger area and a depth from a surface of the crankpin less than those of another hole 213M. In forming the hole 213L and the hole 213M, a preformed product 200 of the crankshaft having a shape smaller than that of a cavity is disposed in a die set and punches are simultaneously inserted into the crankpin 213. By this operation, the hole 213L and the hole 213M are simultaneously formed in each crankpin 213 of the preformed product 200.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: June 25, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Takayuki Ohnuma, Tsutomu Ando, Yasuhiro Ito
  • Patent number: 8468695
    Abstract: A machine which comprises two machining heads (1, 2) designed to machine crankshaft (5) ends and two machining stations (3, 4) designed to receive and secure at least one crankshaft (5). The machining stations (3, 4) are disposed between the two machining heads (1, 2). The crankshafts (5) are mounted in such a manner as to be disposed parallel to each other and oriented at 180°.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: June 25, 2013
    Assignee: Etxe-Tar, S.A.
    Inventors: Francisco Maria Ayestaran Lazcano, Gorka Gorrochategui Salaberria
  • Patent number: 8371029
    Abstract: The present invention provides a production apparatus for crankshaft, including: a die which has a lower die, an upper die, and plural side forming punches, the upper die being provided movably to the lower die, the side forming punches moving perpendicularly to a movement direction of the upper die; a press ram which moves the upper die to the lower die, closes a material of the crankshaft, and forms the material; cam mechanisms which are provided for the side forming punches and which move the side forming punches to an inside portion of the die in accordance with movement of the press ram; a grade separation structure which is provided to at least one of the side forming punches in order to prevent interference of the side forming punches with each other.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: February 12, 2013
    Assignees: Honda Motor Co., Ltd., Nichidai Corporation
    Inventors: Yasuhiro Ito, Takayuki Ohnuma, Tsutomu Ando, Yasuyuki Kondo
  • Publication number: 20120288392
    Abstract: An assembly includes a composite metal-polymer bushing having an outer metal layer with an inner surface, metal particles sintered to the inner surface, a polymer material between the metal particles, a finished interior surface collectively defined by the polymer material and exposed portions of the metal particles, a plurality of interstices formed between the metal particles and the polymer material, and a plurality of ridges defined by the polymer material that protrude above the metal particles. The ridges occupy at least about 8% of the area of a cylindrical reference surface nominally coinciding with the finished interior surface. The assembly also includes a crankshaft having a journal at least partially received within the bushing and supported by the finished interior surface. The journal is polished to a surface finish of about 0.1 microns or less to reduce a wear rate of the bushing.
    Type: Application
    Filed: May 9, 2011
    Publication date: November 15, 2012
    Applicant: TRANE INTERNATIONAL INC.
    Inventors: Michael G. Benco, William E. Lapp, Derrick J. Lepak, Arther L. Butterworth, David Janda, Dennis R. Dorman
  • Patent number: 8245374
    Abstract: A deep rolling machine has a power unit (13) attached in a gate (31) such that the power unit (13) can be moved in the direction of force exertion (30). The power unit (13) is connected, with articulation, at one end (32), via a joint (33), to the end (11) of a shearing arm (3) of the deep rolling unit (15). The free end (34) of the gate (31) is fit with a back up roller (35) that is routed along a curved web (36), defined in a gap in the second end (11) of the shearing arm (3). In the closed position of the power unit (13), three joints (28, 29, 33) form a triangle (37). One of the joints (28) points to the rotating joint (5). The two shearing arms (3 and 4) of the deep rolling unit (15) are articulately connected to one another at the rotating joint (5). Also in the closed position, a crank lever (27) reaches a limit stop (39) at the end (12) of the shearing arm (4).
    Type: Grant
    Filed: April 3, 2006
    Date of Patent: August 21, 2012
    Assignee: Hegenscheidt-MFD GmbH & Co. KG
    Inventors: Roland Heffe, Alfred Heimann, Theo Nijssen, Frank Risters
  • Publication number: 20120198671
    Abstract: A machining device for machining crankshafts has a rotationally driven disk-shaped base body with blade inserts arranged peripherally thereon. A first supply line for a cryogenic cooling medium is arranged concentrically with the axis of rotation and is thermally insulated in at least some sections. The tool has a plurality of second supply lines for the cryogenic cooling medium running across the axis of rotation and leading to the blade inserts, the second supply lines each being thermally insulated in at least some sections. A distributor unit connects the first supply line to at least one of the second supply lines for supplying the cryogenic cooling medium to at least one of the blade inserts. The cryogenic cooling medium can be conducted directly to the blade inserts which are engaged with the crankshaft that is to be machined.
    Type: Application
    Filed: February 3, 2012
    Publication date: August 9, 2012
    Inventors: Moshe Israel Meidar, Wolfgang Horn, Heiner Lang, Holger H. Kolb, Paul Dieter Scharpf
  • Publication number: 20120137480
    Abstract: Disclosed is a device for deep-rolling transition radii (5, 6) of crankshafts (1). Said device comprises at least one ruler-shaped rolling element (12, 13) that can be moved back and forth in one direction and has a substantially rectilinear contact surface (14, 15), a corresponding guiding surface for introducing a deep-rolling force (F) into a transition radius (5, 6) of a crankshaft (1), said guiding surface lying across from the guiding surface (14, 15) at a certain distance, and a means which generates a guiding and pressing force of the rolling element (12, 13). Said means consists of a guiding roller (29) which is rotatably mounted in the housing (18) of a deep-rolling tool (11) and has a circular guiding surface (24, 25) in relation to the guiding roller (29). The guiding surface of the rolling element (12, 13) adapts to said circular guiding surface (24, 25).
    Type: Application
    Filed: November 21, 2008
    Publication date: June 7, 2012
    Applicant: HEGENSCHEIDT-MFD GMBH & CO. KG
    Inventor: Alfred Heimann
  • Publication number: 20120096696
    Abstract: A deep rolling machine has a power unit (13) attached in a gate (31) such that the power unit (13) can be moved in the direction of force exertion (30). The power unit (13) is connected, with articulation, at one end (32), via a joint (33), to the end (11) of a shearing arm (3) of the deep rolling unit (15). The free end (34) of the gate (31) is fit with a back up roller (35) that is routed along a curved web (36), defined in a gap in the second end (11) of the shearing arm (3). In the closed position of the power unit (13), three joints (28, 29, 33) form a triangle (37). One of the joints (28) points to the rotating joint (5). The two shearing arms (3 and 4) of the deep rolling unit (15) are articulately connected to one another at the rotating joint (5). Also in the closed position, a crank lever (27) reaches a limit stop (39) at the end (12) of the shearing arm (4).
    Type: Application
    Filed: April 3, 2006
    Publication date: April 26, 2012
    Applicant: Hegenscheidt-MFD GmbH & Co. KG
    Inventors: Roland Heffe, Alfred Heimann, Theo Nijssen, Frank Risters
  • Publication number: 20120093594
    Abstract: The invention relates to an end mill (1) for processing a bearing region of a crankshaft, in particular a crankshaft of a ship's engine, with a base body (2) with an end face (3) and several inserts (4) designed for a turn milling, which are arranged on or in the end face (3). In order to achieve favorable chip removal conditions with low cutting forces and thus a low tool load, it is provided according to the invention that the inserts (4) each have at least one cutting edge which comprises alternately active cutting regions and non-active cutting regions.
    Type: Application
    Filed: June 21, 2010
    Publication date: April 19, 2012
    Applicant: BOEHLERIT GMBH & CO. KG.
    Inventor: Peter Kirchberger
  • Publication number: 20110308052
    Abstract: A preformed product of a crankshaft is formed in a shape smaller than a shape of a cavity of a separatable die set 1103 composed of an upper die and a lower die and is disposed in the cavity of the die set 1103 as a material M. The cavity of the die set 1103 matches a required shape of the crankshaft. When the material M is disposed in the cavity of the die set 1103, a clearance is formed between the material M and the cavity, and when a side-forming punch 1000P is inserted into the material M, a hollow hole is formed in the material M and the cavity is filled with the material M. As a result, not only can weight saving be achieved by forming the hole in the crankpin of the crankshaft, but also degradation of dimensional accuracy by forming the hole can be avoided.
    Type: Application
    Filed: February 5, 2010
    Publication date: December 22, 2011
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Takayuki Ohnuma, Tsutomu Ando, Yasuhiro Ito
  • Publication number: 20110005074
    Abstract: The present invention relates to a machine for machining crankshaft (5) ends, which comprises two machining heads (1, 2) designed to machine crankshaft (5) ends and two machining stations (3, 4) designed to receive and secure at least one crankshaft (5), said machining stations (3, 4) being disposed between the two machining heads (1, 2). The crankshafts (5) will be mounted in such a manner as to be disposed parallel to each other and oriented at 180°. Additionally, the machining heads (1, 2) are designed to be positioned facing the ends of the crankshafts (5) of the machining stations (3, 4). Additionally, the invention relates to a crankshaft (5) machining process based on the fact that both machining heads (1, 2) alternately machine flange ends (9) and spike ends (8) in the crankshafts (5) secured to the machining heads (3, 4). In this manner, the machine machines crankshafts without stopping between the machining of two successive crankshafts.
    Type: Application
    Filed: February 20, 2008
    Publication date: January 13, 2011
    Inventors: Francisco Maria Ayestaran Lazcano, Gorka Gorrochategui Salaberria
  • Publication number: 20100326235
    Abstract: An apparatus (30) for metal forging a crankshaft (100) having a plurality of throws (6, 7, 8, 9) having parallel axes (31, 32, 33, 34) comprises an upper die (40) and a lower die (50) each having cavities defining a negative shape of a corresponding half of the crankshaft (100). The two dies (40, 50) have mating surfaces (62, 63, 64, 65) lying on different parallel planes. A metal forged crankshaft (100) forged by such apparatus (30) comprises a plurality of throws (6, 7, 8, 9) having parallel throw axes (31, 32, 33, 34) lying in a same plane of symmetry (41) and split-lines (17, 18, 19, 20) from the forging process lying in planes (42, 43) substantially orthogonal to said plane of symmetry (41).
    Type: Application
    Filed: February 29, 2008
    Publication date: December 30, 2010
    Applicant: PERKINS ENGINES COMPANY LIMITED
    Inventor: Adam D. Kilbon
  • Publication number: 20100242241
    Abstract: The present invention provides a production apparatus for crankshaft, including: a die which has a lower die, an upper die, and plural side forming punches, the upper die being provided movably to the lower die, the side forming punches moving perpendicularly to a movement direction of the upper die; a press ram which moves the upper die to the lower die, closes a material of the crankshaft, and forms the material; cam mechanisms which are provided for the side forming punches and which move the side forming punches to an inside portion of the die in accordance with movement of the press ram; a grade separation structure which is provided to at least one of the side forming punches in order to prevent interference of the side forming punches with each other.
    Type: Application
    Filed: March 25, 2010
    Publication date: September 30, 2010
    Applicants: HONDA MOTOR CO., LTD., NICHIDAI CORPORATION
    Inventors: Yasuhiro ITO, Takayuki Ohnuma, Tsutomu Ando, Yasuyuki Kondo
  • Publication number: 20100146753
    Abstract: In a method for increasing the strength of a component subjected to torsional and flexural stress, in particular of a crankshaft, in a first step essentially the entire component is provided with a nitriding layer. In a second step, the nitriding layer is at least partially removed in at least one highly stressed region of the component by means of cutting machining, and, in a third step, the at least one highly stressed component region freed of the nitriding layer is mechanically strain-hardened.
    Type: Application
    Filed: December 18, 2009
    Publication date: June 17, 2010
    Inventors: Alfons Reeb, Jochen Schmidt
  • Patent number: 7716827
    Abstract: The present invention concerns an apparatus for aligning and/or installing reluctor rings on crankshafts. The apparatus include a tool body having first and second alignment mechanisms which register with crankshaft and reluctor ring apertures for aligning the reluctor rings on the crankshafts in a correct phase orientation for proper ignition timing.
    Type: Grant
    Filed: October 28, 2004
    Date of Patent: May 18, 2010
    Assignee: Goodson Mfg.
    Inventor: Lars Eriksson
  • Patent number: 7419460
    Abstract: In a machine tool arrangement comprising a machine tool component including a mounting structure for a work piece to be machined by a suitable metal cutting tool, a housing enclosing the machine tool component, a horizontal support beam is disposed above the housing and carries handling equipment for supplying work pieces from an adjacent loading area to the machine component for machining and returning the finished work pieces to the storage structure and an intermediate storage structure is disposed near the machine tool component for temporarily storing unfinished work pieces to be machined and finished work pieces after being machined.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: September 2, 2008
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventors: Heinrich Bonfert, Georg Deponte, Wolfgang Märker, Michael Herkert
  • Patent number: 7387008
    Abstract: There is provided a new and improved apparatus and method for rolling workpieces such as crankshafts. The apparatus has first and second rolling heads mounted at spaced positions along a common rolling arm to receive a crankshaft bearing therebetween which can then be shifted relative to one another along the common rolling arm to close the heads or rolling tools for clamping onto the workpiece. The in-line clamping action and force provided by the tools on the rolling arm are created by actuation of a tall, thin cylinder assembly including a number of aligned individual cylinders sized to keep the width of the cylinder assembly to a minimum so that all of the rolling arms can likewise be of a thin construction pivotally mounted on one side of the crankshaft and axially spaced according to the crankshaft bearing spacing for rolling all of the bearings in a single rolling operation.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: June 17, 2008
    Assignee: Ingersoll CM Systems, Inc.
    Inventors: Allan J. Heffron, Earl O. Brechtelsbauer, Marc D. St. Pierre
  • Patent number: 7179029
    Abstract: A machine for machining workpieces has at least one milling tool with an internal cutter. The machine is provided with a first guide system and a second guide system parallel to the first guide system. The first guide system has at least one compound slide having a slide part, wherein the at least one compound slide is moveable in a longitudinal direction of the first guide system and wherein the slide part is moveable transversely to the longitudinal direction. A milling tool is secured on the slide part. The first and second guide systems have sliding guides or roller bearing guides. The at least one compound slide has a transverse guide system and the slide part is guided on the transverse guide system.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: February 20, 2007
    Assignee: Gebr. Heller Maschinenfabrik GmbH
    Inventors: Christoph Hemming, Wolfgang Märker, Heinrich Bonfert
  • Patent number: 7100412
    Abstract: The invention relates to a deep-rolling roller head (1) of a deep-rolling tool for the deep rolling of radii or undercuts (22) on the main and stroke journals of crankshafts (21), with a housing (2) in which one or two deep-rolling rollers are tracked with little clearance and are loosely rotatable in a roller cage (5) at a lateral distance from each other. The roller cage (5) is attached to underside (3) of the housing (2) towards the crankshaft (21) by means of pins (15) which support the roller cage (5) on its face (10) away from the deep-rolling rollers (4) and at the same time track them laterally. The housing (2) is provided with a projection (11, 12) for the support of the roller cage (5) on either end of its underside (3) towards the crankshaft (21). Pins (15) serving as fastening and tracking elements of the roller cage (5) are provided and engage the roller cage (5).
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: September 5, 2006
    Assignee: Hegenscheidt-Mfd GmbH & Co. KG
    Inventor: Heinrich Wilhelm Derichs
  • Patent number: 7100413
    Abstract: The invention relates to a deep-rolling roller head (1) of a deep rolling tool with deep-rolling rollers (2) that are rotatably mounted in roller cages (3) and are at a distance (4) from the center (5) of the underside (6) of the housing (7) of the deep-rolling roller head (1) and are supported on the front (8) at the end of the long leg (9) of two L-shaped holding devices (11) that can be adjusted and fixed in the direction of the center (5). A first screw (13) enters an oblong hole (12) in each long leg (9) to hold the L-shaped holding device (11) on the underside of the housing (7) while a second screw (14) passes through a bore (15) in each short leg (10 and enters a bore (26) in the adjoining front (21) of the housing (7), being provided in order to adjust the precise position of the roller cage (3) relative to the center (5).
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: September 5, 2006
    Assignee: Hegenscheidt-MFD GmbH & Co. KG
    Inventor: Heinrich Wilhelm Derichs
  • Patent number: 6993837
    Abstract: The invention relates to a method for assembling a camshaft by using a shaft (10) and a plurality of cams (21–26) comprising respectively an opening for the shaft. According to the invention, the cams are disposed in a tight manner in a storage element (40), in such a way that they are orientated towards each other in a predefined rotative position, the openings thereof for the shaft being orientated in a coaxial manner. The shaft is then introduced into the cam packet and arranged consecutively with respect to each individual cam by displacement in the longitudinal direction thereof. The cams are secured one after the other on the shaft. The required rotation of the cams can be obtained in a simple manner by longitudinal displacement of the shaft and also by optionally rotating the shaft at a certain angle.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: February 7, 2006
    Inventor: Karl Merz
  • Patent number: 6990842
    Abstract: The invention pertains to a method for deep-rolling radii or fillets (2) at the transition between the bearing journals (3) and the adjacent flange (4) of a bearing point of a crankshaft (1) with the aid of deep-rolling cylinders. The deep-rolling cylinders are pressed into the radius or the fillet (2) of the transition with a deep-rolling force until a predetermined roll-down depth (10) is reached while the crankshaft (1) is turned. The transition is initially deep-rolled with a first deep-rolling cylinder, the radius (6) of which has an osculating ratio between 1 and 0.85 referred to the radius of the transition or the fillet (2), namely with a first deep-rolling force that produces a maximum internal compressive stress (7) in the transition at a depth between 1 and 2 mm below the deep-rolled surface (8).
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: January 31, 2006
    Assignee: Hegenscheidt-MFD GmbH & Co. KG
    Inventor: Alfred Heimann
  • Patent number: 6961998
    Abstract: Hollow shafts, and particularly camshafts, are produced using an internal high-pressure forming (IHF) process. Cams and/or machine elements are mounted at intervals onto the outer surface of the hollow shaft, depending on the use of the latter, by a non-positive and/or positive fit, in a position appropriate to their function when the hollow shaft is placed in the forming tool. An element with approximately the same external diameter as the internal diameter of the hollow shaft is placed in at least one of the hollow shaft, and the hollow shaft together with the cams and/or machine elements that have been pushed onto the same and the inserted element are placed in an IHF tool. Once the IHF tool is closed, the medium is caused to act under the required high-pressure in the hollow shaft. At the same time as the medium is acting internally, at least one ram is pressed axially against at least one front face of the hollow shaft.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: November 8, 2005
    Assignee: Salzgitter Antriebstechnik GmbH & Co. KG
    Inventors: Bodo Furchheim, Franz-Josef Schleifstein
  • Patent number: 6786073
    Abstract: An apparatus and method are provided for roll hardening of crankshafts having split-pin bearings without requiring multiple rolling stages or operations therefor. The apparatus and method herein utilize a single tool unit that varies the rolling pressure on the fillets on either side of one of the split-pin bearings such that the areas needing strengthening are simultaneously rolled with a higher pressure than those areas at which bending of fence walls between adjacent bearings can occur with high pressure rolling, despite their arcuately offset orientation relative to each other. The tool unit has a pair of rollers rotatively housed at predetermined positions so that, when engaged against the opposite fillets of a bearing, they will be at arcuately offset or spaced positions from each other about the bearing.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: September 7, 2004
    Assignee: Ingersoll CM Systems LLC
    Inventor: Bramwell W. Bone
  • Patent number: 6698095
    Abstract: The invention concerns a method for machining crankshaft comprising the following main operations: determining starting points; machining the ends, bearings and crank pins; producing lubricating oil holes; finishing the ends, bearings and crank pins, dynamic measurement and optionally removing material for balancing purposes. The method is characterized in that it consists in carrying out dynamic mass measurements and eliminating material for balancing purposes, before the finishing operations. The invention also concerns a device for implementing said method. The invention is applicable to production lines machining and balancing crankshafts.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: March 2, 2004
    Assignee: Renault Automation Comau
    Inventor: Jean-Paul Assie
  • Publication number: 20040034975
    Abstract: The invention relates to a method for producing a hollow shaft, in particular a camshaft according to an internal high-pressure forming (IHF) process. According to said method, cams and/or machine elements are mounted at intervals onto the outer surface of the hollow shaft, depending on the use of the latter, by a non-positive and/or positive fit, in a position appropriate to their function. The invention also relates to a hollow shaft produced according to said method. The invention aims to improve the efficiency of the method.
    Type: Application
    Filed: March 21, 2003
    Publication date: February 26, 2004
    Inventors: Bodo Furchheim, Franz-Josef Schleifstein
  • Publication number: 20040025339
    Abstract: A method for manufacturing a crankshaft for motor vehicles with passages being provided in the crankshaft for receiving lubricant. Prior to the casting process, place holders, which may include formed parts having cavities alone and/or together with a core, are inserted into the mold to form passages for receiving lubricant.
    Type: Application
    Filed: May 8, 2003
    Publication date: February 12, 2004
    Applicant: DaimlerChrysler AG
    Inventors: Tilmann Haug, Michael Niestegge
  • Patent number: 6619090
    Abstract: A roll-hardening machine for crankshafts with hard-rolling tools (2) which each have a hard-rolling roller head (1) and a counter-support roller that are each detachably attached to the ends (17) of appropriate scissors arms (3) by means of two clamping blocks (15) wherein respectively a first of the two clamping blocks (15) is positioned on the front surface (16) of the end (17) of the scissor arm (3) and the second clamping block is located at a right angle to the first (15) on the side surface (16) of this same scissor arm (3) on the tool side, characterized in that the first clamping block (15) is supported on the front surface (16) at the end (17) of the respective scissors arm (3) such that it can slide in the direction of the appropriate hard-rolling tool (1), the hard-rolling roller head (1) is supported moveably at the location of the second clamping block on the scissors arm (3), by having guide grooves on its front surfaces facing the scissors arm (3), wherein prismatic blocks of the scissors arm (
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: September 16, 2003
    Assignee: Hegenscheidt-MFD GmbH & Co. KG
    Inventor: Roland Heffe
  • Patent number: 6397463
    Abstract: A method for machine a V crankshaft. A measurement is made of the dynamic mass and the centering points are drilled. The reference surfaces are preset by machining the raw crankshaft reference surfaces before the dynamic mass measurement.
    Type: Grant
    Filed: September 17, 1999
    Date of Patent: June 4, 2002
    Assignee: Renault Automation Comau
    Inventor: Jean-Paul Assie