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1. 发明申请

US20060185416A1 Metal forged product, upper or lower arm, preform of the arm, production method for the metal forged product, forging die, and metal forged product production system 有权
标题翻译：金属锻造产品，上臂或下臂，手臂预成型件，金属锻造产品，锻造模具和金属锻造产品生产系统的生产方法
公开(公告)号：US20060185416A1
公开(公告)日：2006-08-24
申请号：US10546043
申请日：2004-02-18
申请人： Takafumi Nakahara , Mitsuharu Akiyama
发明人： Takafumi Nakahara , Mitsuharu Akiyama
IPC分类号： B21J5/02
CPC分类号： B21K3/00 , B21J5/02 , B21K1/12 , B21K1/74 , B21K1/76 , B21K1/762
摘要： A method for producing a metal forged product having a plurality of branches includes a preliminary forging step of forming a preform by closed forging from a cylindrical material (301) having a surface layer (302) on a circumferential surface thereof such that the surface layer is contained in a surface region of the preform; an intermediate forging step of subjecting the preform to forging to thereby extrude the surface layer in the form of flash outside a periphery of a forged product corresponding to a target product; a final forging step of forging the forged product into a product assuming a target product shape; and a flash removal step of removing the flash containing the surface layer from the product assuming a target product shape to thereby produce a target forged product. The forged product is enhanced in mechanical characteristics and has no flash removal mark. Since the cylindrical material having a surface layer on a circumferential surface thereof is used, the power required for the steps can be reduced to enhance the yield of the products on the basis of the forging material.
摘要翻译：一种具有多个分支的金属锻造制品的制造方法，其特征在于，具有：预成形体，其从在圆周面上具有表面层（302）的圆筒状材料（301）的闭合锻造形成预成型体，包含在预成型体的表面区域中; 中间锻造步骤，对预成型坯进行锻造，从而将表面层以对应于目标产品的锻造产品的外围的闪光形式挤出; 将锻造的产品锻造成具有目标产品形状的产品的最终锻造步骤; 以及闪光除去步骤，从假定目标产品形状的产品中去除含有表面层的闪光，从而产生目标锻造产品。锻造产品的机械特性得到提高，没有闪光除去痕迹。由于使用在其圆周表面上具有表面层的圆柱形材料，因此可以减少步骤所需的功率，以提高基于锻造材料的产品的产量。

2. 发明授权

US07257981B2 Closed forging method, forging production system using the method, forging die used in the method and system, and preform or yoke produced by the method and system 有权
标题翻译：封闭锻造方法，使用该方法的锻造生产系统，方法和系统中使用的锻造模具，以及由该方法和系统生产的预成型件或轭
公开(公告)号：US07257981B2
公开(公告)日：2007-08-21
申请号：US10473299
申请日：2002-03-29
申请人： Masayuki Natsui , Takafumi Nakahara
发明人： Masayuki Natsui , Takafumi Nakahara
IPC分类号： B21D31/00
CPC分类号： B21K1/762 , B21J5/02 , B21K1/74 , B21K1/76 , B21K3/00
摘要： A closed forging method for producing a forged product includes preparing as a forging material a cylindrical cast ingot that has a volume the same as the volume of a forged product and assumes a shape having an upper surface, a lower surface and a side surface and containing no angular portion; and applying pressure to the side surface of the forging material. The shape has a ratio of the lateral length of a projection profile of the forging material as viewed in the direction perpendicular to the direction of pressure application to a length of the forging material as measured in the direction of pressure application is 1 or less. The forged product obtained is a preform of an upper arm or a lower arm with a plurality of branches that is a suspension part for a vehicle or a yoke with a plurality of branches that is a joint part employed in a vehicle suspension. The preform or yoke has metal flow lines along each branch and exhibits enhanced mechanical strength.
摘要翻译：用于生产锻造产品的封闭锻造方法包括制备具有与锻造产品的体积相同的体积的圆柱形铸锭作为锻造材料，并且具有上表面，下表面和侧表面的形状，并且包含无角部; 并对锻造材料的侧面施加压力。该形状具有在与施加压力方向垂直的方向上的锻造材料的突出轮廓的横向长度与在压力施加方向上测量的锻造材料的长度的比率为1以下。获得的锻造制品是具有多个分支的上臂或下臂的预制件，所述多个分支是用于车辆的悬架部分或具有作为车辆悬架中使用的接合部分的多个分支的轭。预成型件或轭具有沿着每个分支的金属流动线，并且表现出增强的机械强度。

3. 发明授权

US4671752A Air-pulverizing apparatus for high-temperature molten slag 失效
标题翻译：用于高温熔渣的空气粉碎装置
公开(公告)号：US4671752A
公开(公告)日：1987-06-09
申请号：US709175
申请日：1985-03-07
申请人： Takafumi Nakahara , Makoto Fujiwara , Motoe Kondo , Yoshiharu Miyawaki , Masayuki Hanmyo , Shinya Kinoshita , Masao Matsui , Konoshin Tamura , Susumu Murata
发明人： Takafumi Nakahara , Makoto Fujiwara , Motoe Kondo , Yoshiharu Miyawaki , Masayuki Hanmyo , Shinya Kinoshita , Masao Matsui , Konoshin Tamura , Susumu Murata
IPC分类号： C04B5/02 , B01J2/02 , B01J2/04 , C21B3/06 , C21B3/08 , B22F9/08 , B29B9/00 , B29C67/00
CPC分类号： C21B3/08
摘要： An apparatus for air-pulverizing high-temperature molten slag by blowing air at high speed through a nozzle into a flow of molten slag that is falling from an inclined container by the intermediary of a turndish. A heat detector is provided for detecting the quantity of heat in the flow of molten slag after being air-pulverized by the high speed air flow, and a feedback control device which is responsive to a detection signal issued from the detector is provided for calculating a desirable inclination angle of the container or the turndish and transmitting a control signal obtained as a result of the calculation to a controller for controlling the inclination of the container or turndish thereby stabilizing the air-pulverizing of the high-temperature molten slag.
摘要翻译：一种用于通过喷嘴将空气高速吹入由倾斜的容器倾倒的熔融炉渣流中的空气粉碎高温熔渣的装置。提供一种热检测器，用于检测在通过高速空气流被空气粉碎之后的熔渣流中的热量，并且提供响应于从检测器发出的检测信号的反馈控制装置，用于计算将容器的倾斜角度或倾斜角度，并将作为计算结果获得的控制信号传送到控制器，用于控制容器的倾斜或转向，从而稳定高温熔渣的空气粉碎。

4. 发明授权

US07770427B2 Metal forged product, upper or lower arm, preform of the arm, production method for the metal forged product, forging die, and metal forged product production system 有权
标题翻译：金属锻造产品，上臂或下臂，手臂预成型件，金属锻造产品，锻造模具和金属锻造产品生产系统的生产方法
公开(公告)号：US07770427B2
公开(公告)日：2010-08-10
申请号：US10546043
申请日：2004-02-18
申请人： Takafumi Nakahara , Mitsuharu Akiyama
发明人： Takafumi Nakahara , Mitsuharu Akiyama
IPC分类号： B21D22/02 , B21D22/00 , B21C51/00
CPC分类号： B21K3/00 , B21J5/02 , B21K1/12 , B21K1/74 , B21K1/76 , B21K1/762
摘要： A method for producing a metal forged product having a plurality of branches includes a preliminary forging step of forming a preform by closed forging from a cylindrical material (301) having a surface layer (302) on a circumferential surface thereof such that the surface layer is contained in a surface region of the preform; an intermediate forging step of subjecting the preform to forging to thereby extrude the surface layer in the form of flash outside a periphery of a forged product corresponding to a target product; a final forging step of forging the forged product into a product assuming a target product shape; and a flash removal step of removing the flash containing the surface layer from the product assuming a target product shape to thereby produce a target forged product. The forged product is enhanced in mechanical characteristics and has no flash removal mark. Since the cylindrical material having a surface layer on a circumferential surface thereof is used, the power required for the steps can be reduced to enhance the yield of the products on the basis of the forging material.
摘要翻译：一种具有多个分支的金属锻造制品的制造方法，其特征在于，具有：预成形体，其从在圆周面上具有表面层（302）的圆筒状材料（301）的闭合锻造形成预成型体，包含在预成型体的表面区域中; 中间锻造步骤，对预成型坯进行锻造，从而将表面层以对应于目标产品的锻造产品的外围的闪光形式挤出; 将锻造的产品锻造成具有目标产品形状的产品的最终锻造步骤; 以及闪光除去步骤，从假定目标产品形状的产品中去除含有表面层的闪光，从而产生目标锻造产品。锻造产品的机械特性得到提高，没有闪光除去痕迹。由于使用在其圆周表面上具有表面层的圆柱形材料，因此可以减少步骤所需的功率，以提高基于锻造材料的产品的产量。

5. 发明授权

US5054441A Decompression device in a two-cycle engine 失效
标题翻译：双周期发动机的分解装置
公开(公告)号：US5054441A
公开(公告)日：1991-10-08
申请号：US353322
申请日：1989-05-15
申请人： Yoshihide Nakatani , Shigeichi Okada , Eiji Yaezawa , Makoto Takata , Takafumi Nakahara
发明人： Yoshihide Nakatani , Shigeichi Okada , Eiji Yaezawa , Makoto Takata , Takafumi Nakahara
IPC分类号： F02B25/14 , F02B75/02 , F02B77/04 , F02F1/22
CPC分类号： F02B77/04 , F02B25/14 , F02F1/22 , F02B2075/025
摘要： For the purpose of preventing a decompression passageway in a two-cycle engine from being blocked by carbon soot, facilitating manufacture of a two-cycle engine having decompression structure and eliminating reduction of output power of the two-cycle engine caused by the decompression structure, a known two-cycle engine includes a scavenging passageway formed along an inner wall of a cylinder. The scavenging passageway is directed in the axial direction of the cylinder and communicates with a crank case of the engine. A decompression groove extends in the axial direction of the cylinder on the upstream side of a cylinder cooling airflow at a top end portion of the scavenging passageway. The width and depth of the decompression groove are either varied along the axial direction of the groove so as to be narrowed towards a tip end thereof directed toward a plug, or are provided with a narrowed portion of venturi shape.

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