Patents by Inventor Kazuhiro Shimoda

Kazuhiro Shimoda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7866199
    Abstract: a billet made of high Cr-high Ni alloy, which contains, by mass percent, 20 to 30% of Cr, 30 to 50% of Ni, and at least one element selected from Mo and W with a value “Mo+0.5W” of 1.5% or more is heated under conditions satisfying the following formula (1), and then the billet is pierced and rolled using an inclined roll type piercing mill with a roll gouge circumferential speed of 2.28 m/sec or higher. This prevents melted rash on the inner surface and lengthens the plug life. T?1575?4.45×Vf?104.7×{?ln(th/ro)}??(1) wherein T indicates a heating temperature (° C.) of the billet, Vf indicates the roll gouge circumferential speed (m/sec), ro indicates a radius (mm) of a billet at an entry-side, and th indicates a radial thickness (mm) of a pipe after piercing.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: January 11, 2011
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Naoya Hirase, Tomio Yamakawa, Kazuhiro Shimoda
  • Patent number: 7799242
    Abstract: A liquid crystalline composition is disclosed. The composition comprises at least one liquid-crystal compound and at least one fluoroaliphatic group-containing polymer of a formula (1-1). In the formula, i and j each indicate an integer equal to or more than 1; M represents k types of repetitive units each derived from an ethylenic unsaturated monomer (k indicates an integer equal to or more than 1); a, b and c each mean a mass percentage indicating a polymerization ratio; R11 and R12 each represent a hydrogen atom or a methyl group; X1 and X2 each represent an oxygen atom, a sulfur atom or —N(R13)—; R13 represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms; m1 and m2 each indicate an integer of from 1 to 6; and n1 indicates an integer of from 0 to 3.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: September 21, 2010
    Assignee: Fujifilm Corporation
    Inventors: Kazuhiro Shimoda, Hirokazu Nishimura, Shuji Kanayama, Yasutomo Goto
  • Patent number: 7757528
    Abstract: A billet is provided on a pass line between a pusher and a plug, and the billet is advanced and caught between a plurality of inclined rolls. At least between when said caught billet contacts said plug and when the piercing and rolling reaches a steady state, the advancing speed of the billet is not less than the advancing speed of the billet when the piercing and rolling is carried out without pushing the billet forward by the pusher in the steady state. By this manufacturing method, inner surface defects at a tip end of a hollow shell can be restrained.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: July 20, 2010
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Tomio Yamakawa, Kazuhiro Shimoda
  • Publication number: 20100175450
    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: Application
    Filed: March 29, 2010
    Publication date: July 15, 2010
    Inventors: Kazuhiro Shimoda, Tomio Yamakawa, Koji Muramatsu, Yuji Inoue
  • Patent number: 7739892
    Abstract: Seamless pipes excellent in quality features with high productivity is made by a by carrying out piercing-rolling using a piercer provided with a pair of inclined rolls. The piercing-rolling is carried out under conditions such that the plug tip draft (TDFT) or the root of the product of the plug tip draft (TDFT) are controlled along with the number of billet revolutions (N), namely (TDFT×N)0.5. In addition, positions of the inclined rolls are controlled in connection with the gorge draft (GDFT) indicating the ratio of the roll gap (Rg) which is minimal in the gorge section between the inclined rolls to the billet outside diameter (Bd). The piercing-rolling is carried out using a plug having a particular shape.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: June 22, 2010
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Tomio Yamakawa, Kazuhiro Shimoda
  • Patent number: 7727594
    Abstract: According to the drying method and apparatus of the present invention, at first, the coated film on one end side of the support is more quickly dried than that on the other end side, because drying air is supplied from one end side of the support. Subsequently, the coated film on the other end side of the support is more quickly dried than that on one end side, because drying air is supplied from the other end side of the support. Accordingly, the method and the apparatus can diminish a difference between drying rates in on one end side and in the other end side of the long support, in the whole drying zone. Thus, the method and the apparatus can uniformly dry the support and inhibit the production of a dry spot.
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: June 1, 2010
    Assignee: FUJIFILM Corporation
    Inventors: Kazuhiro Shimoda, Kyohei Yoshimura, Nobuo Hamamoto
  • Patent number: 7722930
    Abstract: In a drying method of an aspect of the present invention, drying steps are conducted immediately after coating in a drying zone, and during the execution of drying by blowing the one-way flow drying wind flowing from one edge side to another edge side in the width direction of the continuous support, the windless drying step is conducted in a windless drying zone provided in the drying zone where the drying wind is not blown.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: May 25, 2010
    Assignee: FUJIFILM Corporation
    Inventors: Kazuhiro Shimoda, Nobuo Hamamoto, Yasunaga Harabe
  • Patent number: 7722921
    Abstract: Anti-reflection film includes a transparent support, at least one optical functional layer overlaid on the support, and a low refractive index layer, overlaid on the optical functional layer, and having a lower refractive index than the optical functional layer. An anti-reflection film producing apparatus to produce this includes a coater for coating a surface of the optical functional layer with liquid for forming the low refractive index layer, to form a coating layer. A dryer promotes drying of the coating layer. A heater hardens the coating layer from the dryer at a first temperature level, and then hardens the coating layer at a second temperature level higher than the first temperature level, to form the low refractive index layer. Preferably, a difference between the first and second temperature levels is 1-50 deg. C. Also, ultraviolet rays are applied to the low refractive index layer after the hardening of the heater.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: May 25, 2010
    Assignee: FUJIFILM Corporation
    Inventors: Kazuhiro Shimoda, Hirokazu Nishimura, Makoto Satoh
  • Publication number: 20100107714
    Abstract: A pusher device 4 includes a cylinder device 30 and a pusher mandrel 34. The cylinder device 30 includes a cylinder shaft 32. The pusher mandrel 34 is attached to the tip end of the cylinder shaft 32. The tip end of the pusher mandrel 34 is abutted against the rear end of a billet 20. The cross sectional area Sp of the pusher mandrel 34 and the cross sectional area Sb of the billet 20 satisfy Expression (1). The length Lp of the pusher mandrel 34 and the cross sectional area Sp of the pusher mandrel 34 satisfy Expression (2). The moving distance Lc of the tip end of the cylinder shaft 32 during piercing and rolling and the outer diameter Dc of the cylinder shaft 32 satisfy Expression (3). Therefore, the pusher device 4 can restrain the wall thickness deviation of the tip end part of a produced hollow shell. 0.3?Sp/Sb??(1) Lp/Sp?1.
    Type: Application
    Filed: January 12, 2010
    Publication date: May 6, 2010
    Inventors: Tomio Yamakawa, Kazuhiro Shimoda
  • Publication number: 20100089111
    Abstract: A plug 2 used for a piercer according to the invention includes a tip end portion 23, a cylindrical portion 24, a barrel portion 25, a mandrel coupling portion 22, and an injection hole 21. The injection hole 21 penetrates from the surface of the cylindrical portion 24 to the surface of the mandrel coupling portion 22 and an externally supplied lubricant is injected from the hole. A clearance forms between the pierced material and the cylindrical portion 24. The injection hole 21 is formed at the cylindrical portion 24, and therefore the material in the process of piercing does not contact the injection hole 21. Therefore, an inner surface defect attributable to the contact between the material and the injection hole 21 can be prevented from being generated.
    Type: Application
    Filed: June 14, 2006
    Publication date: April 15, 2010
    Inventors: Kazuhiro Shimoda, Tomio Yamakawa
  • Publication number: 20100050723
    Abstract: A piercing and rolling plug has a film composed of oxides such as Fe3O4 and FeO and Fe (metal) as being formed on the surface of the base metal by electric arc spraying using an iron wire whose main component is Fe and, owing to this film, a plug excellent in heat-shielding and seizure-preventing effects can be realized and the lifetime of the plug can be prolonged. Further, in regenerating this plug, a film can be re-formed via the steps of shot blasting of the as-used plug in piercing and rolling and electric arc spraying in that order; thus, it is possible to regenerate the plug at low cost and in a short period of time.
    Type: Application
    Filed: June 24, 2009
    Publication date: March 4, 2010
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: Yasuyoshi Hidaka, Kazuhiro Shimoda, Kouji Nakaike, Naoya Hirase, Yasuto Higashida, Takateru Inage, Jyun Nagakita, Masaharu Nakamori, Fumihito Yoshikawa, Yoshihiko Hayashi, Takayuki Aisaka
  • Publication number: 20100011831
    Abstract: A piercing mill includes a plurality of inclined rolls, a plug, a pusher, and an undriven guide roll. The pusher pushes a round billet from the rear end at least until the round billet advances for a prescribed distance after contacting the inclined rolls. The guide roll is between the inclined rolls and the pusher and includes a roll shaft and a roll surface, with the roll shaft arranged obliquely with respect to a pass line PL. The sectional shape of the roll surface is a concave arch shape. The round billet is rotated by the guide roll and the friction force generated when the round billet contacts the inclined rolls is reduced. Consequently, the wear of the inclined rolls can be restrained if the round billet is pierced and rolled while it is pushed in between the inclined rolls using the pusher.
    Type: Application
    Filed: September 29, 2009
    Publication date: January 21, 2010
    Inventors: Naoya Hirase, Tomio Yamakawa, Kazuhiro Shimoda
  • Publication number: 20100000281
    Abstract: a billet made of high Cr-high Ni alloy, which contains, by mass percent, 20 to 30% of Cr, 30 to 50% of Ni, and at least one element selected from Mo and W with a value “Mo+0.5W” of 1.5% or more is heated under conditions satisfying the following formula (1), and then the billet is pierced and rolled using an inclined roll type piercing mill with a roll gouge circumferential speed of 2.28 m/sec or higher. This prevents melted rash on the inner surface and lengthens the plug life. T?1575?4.45×Vf?104.7×{?ln(th/ro)}??(1) wherein T indicates a heating temperature (° C.) of the billet, Vf indicates the roll gouge circumferential speed (m/sec), ro indicates a radius (mm) of a billet at an entry-side, and th indicates a radial thickness (mm) of a pipe after piercing.
    Type: Application
    Filed: June 26, 2009
    Publication date: January 7, 2010
    Inventors: Naoya Hirase, Tomio Yamakawa, Kazuhiro Shimoda
  • Publication number: 20090301151
    Abstract: The present invention provides a lubricant composition for hot metal working which is capable of inhibiting generation of flaws on the surface of materials to be provided for hot metal working, and provides a method of hot metal working. The invention provides a lubricant composition for hot metal working comprising a plurality of glass frits respectively having different softening point from each other.
    Type: Application
    Filed: March 29, 2007
    Publication date: December 10, 2009
    Applicant: Sumitomo Metal Industries, Ltd.
    Inventors: Kazuhiro Shimoda, Tomio Yamakawa, Kazutaka Asabe, Hirokazu Okada, Yasuyoshi Hidaka, Sumio Iida, Naoya Hirase, Kenji Takeuchi, Suichi Akiyama
  • Publication number: 20090301155
    Abstract: Seamless pipes excellent in quality features with high productivity is made by a by carrying out piercing-rolling using a piercer provided with a pair of inclined rolls. The piercing-rolling is carried out under conditions such that the plug tip draft (TDFT) or the root of the product of the plug tip draft (TDFT) are controlled along with the number of billet revolutions (N), namely (TDFT×N)0.5. In addition, positions of the inclined rolls are controlled in connection with the gorge draft (GDFT) indicating the ratio of the roll gap (Rg) which is minimal in the gorge section between the inclined rolls to the billet outside diameter (Bd). The piercing-rolling is carried out using a plug having a particular shape.
    Type: Application
    Filed: May 15, 2009
    Publication date: December 10, 2009
    Inventors: Tomio Yamakawa, Kazuhiro Shimoda
  • Publication number: 20090218014
    Abstract: The present invention is to provide a method for producing duplex stainless steel seamless pipe in which a duplex stainless steel billet can be inhibited from generating an oxide scale on the surface thereof during heating and the generation of outer surface flaw can also be prevented. The billet is heated in the a heating furnace for 1.5 hours or more and 4.0 hours or less at a heating temperature of 1250° C. or more and 1320° C. or less while regulating the average concentration of sulfur dioxide (SO2) gas in the atmosphere within the furnace to 0.01 volume % or less.
    Type: Application
    Filed: March 23, 2007
    Publication date: September 3, 2009
    Inventors: Naoya Hirase, Tetsuya Nakanishi, Kazuhiro Shimoda, Hirokazu Okada, Tomio Yamakawa, Yasuyoshi Hidaka
  • Patent number: 7578157
    Abstract: To provide a method and apparatus for seamless tubes in which the occurrence of material peeling can be prevented even when the skew angle ? and tube expansion ratio are increased. A piercing-rolling method for seamless tubes using a piercer, which is provided with a pair of cone-shaped main rolls and a pair of disk rolls, each pair being arranged in an opposing manner with a pass line therebetween as a center axis, and a plug whose center axis coincides with the pass line, wherein a billet to be pierced and rolled is advanced while being spirally rotated by a drive rotation of the main rolls; the method of which is characterized in each of the disk rolls being arranged in an inclined state at a fixed skew angle ? to the pass line.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: August 25, 2009
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Tomio Yamakawa, Kazuhiro Shimoda
  • Patent number: 7536888
    Abstract: A high quality hollow shell in which the occurrence of internal surface flaws caused by the rotary forging effect and/or shear deformation is prevented by suppressing the rotary forging frequency and shear deformation in a transient region at the stage of billet gripping and a worsening of thickness deviations in the top portion of the hollow shell is also prevented is reliably produced with preventing miss-rolling such as incomplete billet gripping and troubles in bottom withdrawal and an increase in the outer diameter of the hollow shell in the bottom portion.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: May 26, 2009
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Tomio Yamakawa, Kazuhiro Shimoda
  • Patent number: 7530248
    Abstract: A plug has a tip end portion, a taper portion, and a middle portion. The surface of the tip end portion is a spherical surface whose radius of curvature is R1 and length is L1 that is shorter than R1. The outer diameter of the taper portion on the front end side is D1, and the outer diameter on the back end side is D2 that is larger than D1, and the length is L2. The plug satisfies Expression (1), Expression (2) if 0<L1/R1<0.5 and Expression (3) if 0.5?L1/R1<1. The curve of the spherical surface of the tip end portion is gentler than that of the semi-spherical surface, and the diameter of a hole formed in a billet by the tip end portion is larger than that in the case of the semi-spherical surface. Therefore, the taper portion does not contact with the billet 0.5D1<L1+L2?2.5D1??(1) 1.0<D2/D1?1.4??(2) 1.0<D2/D1<1.8?0.8L1/R1??(3).
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: May 12, 2009
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Kazuhiro Shimoda, Tomio Yamakawa
  • Patent number: 7506526
    Abstract: The present invention provides a seamless tube piercing/rolling plug and a seamless tube producing method in which piercing/rolling is performed with an inclined rotary piercing mill while the seamless tube piercing/rolling plug is used as a piercing tool. The seamless tube piercing/rolling plug is used while a front part and a rear part of the split plug are held as an integral plug, at least the front part is made of low alloy steel, and oxide films are formed on surfaces of the front part and rear part. The present invention also provides a seamless tube piercing/rolling apparatus and a seamless tube producing method in which the front part and/or rear part is replaceable in a tube making process line using the seamless tube piercing/rolling apparatus.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: March 24, 2009
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Tomio Yamakawa, Kazuhiro Shimoda