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公开(公告)号：US10005122B2
公开(公告)日：2018-06-26
申请号：US15118191
申请日：2015-02-20
发明人： Junichi Okubo , Kenji Tamura , Kunihiro Yoshida
CPC分类号： B21K1/08 , B21J5/025 , F16C3/08 , F16C2220/46
摘要： In a forming apparatus, movable journal dies and stationary journal dies hold and retain rough journal portions of a preform blank therebetween, and movable crank pin dies contact rough crank pin portions thereof, and in this state, the movable journal dies and the movable crank pin dies are moved axially toward the stationary journal dies and the movable crank pin dies are moved in a direction perpendicular to an axial direction. With this, rough arm portions are axially compressed to reduce their thickness to that of arms of a forged crankshaft, and the rough crank pin portions are pressed in the direction perpendicular to the axial direction to increase an amount of eccentricity to that of the crank pins of the forged crankshaft.
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公开(公告)号：US20180169742A1
公开(公告)日：2018-06-21
申请号：US15574945
申请日：2016-05-19
发明人： Tomohisa YAMASHITA , Kunihiro YABUNO , Ken YOSHINO , Sho TAKAMOTO , Hiroyuki KUROKAWA , Kenji TAMURA , Junichi OKUBO , Kiyoshi NAKAYAMA , Toru HORIUCHI
摘要： A forged crankshaft manufacturing apparatus processes a forged blank with no flash. The forged blank includes at least one rough crank arm having an excess portion protruding from an outer periphery of a side portion thereof. The manufacturing apparatus includes a first die and a second die paired with each other, a retaining device, and a moving device. The first die and the second die bend or crash the excess portion. The retaining device retains at least one of the rough journals or at least one of the rough pins such that a rough pin decentering direction is perpendicular to a reducing direction in which the first die and the second die apply force for reduction. The moving device supports the retaining device such that the retaining device is movable in the reducing direction.
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公开(公告)号：US20180078994A1
公开(公告)日：2018-03-22
申请号：US15531788
申请日：2015-12-10
发明人： Kenji TAMURA , Junich OKUBO , Ken YOSHINO , Kunihiro YABUNO , Hiroyuki KUROKAWA , Tomohisa YAMASHITA , Sho TAKAMOTO , Koichiro ISHIHARA
摘要： A method for producing a forged crankshaft includes a die forging step of forming a forged blank having a crankshaft shape by die forging, and a pressing step of pressing the forged blank by a first dies. The forged blank includes first excess portions attached to some or all of crank arms each incorporating a counterweight, each of the first excess portions protrudes from a side portion of the crank arm, in a region near a journal. In the pressing step, the first excess portions are deformed by the first dies such that each of the first excess portions bulges toward a pin. This facilitates the production of a forged crankshaft with a reduced weight and assured stiffness.
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公开(公告)号：US20170173663A1
公开(公告)日：2017-06-22
申请号：US15118127
申请日：2015-02-18
发明人： Junichi OKUBO , Kenji TAMURA , Kunihiro YOSHIDA
CPC分类号： B21K1/08 , B21J1/04 , B21J1/06 , B21J5/025 , B21J9/027 , B21K1/00 , F02B2075/027 , F16C3/06 , F16C3/08
摘要： In a forming apparatus, stationary journal dies (10U, 10B) and movable journal dies (11U, 11B) each hold and retain rough journal portions (Ja) of a preform blank (4) therebetween, and crank pin dies (12) contacts rough crank pin portions (Pa) thereof, and in this state, the movable journal dies (11U, 11B) are moved axially toward the stationary journal dies (10U, 10B) and the crank pin dies (12) are moved in the same axial direction and in an eccentric direction. With this, weighted rough arm portions (Aa) are axially compressed to reduce their thickness to that of weighted arms of a forged crankshaft, and the rough crank pin portions (Pa) are pressed in the eccentric direction to increase the amount of eccentricity to that of the crank pins of the forged crankshaft.
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公开(公告)号：US20170165742A1
公开(公告)日：2017-06-15
申请号：US15126810
申请日：2015-03-16
摘要： A crankshaft that can be strengthened in a short time without being subjected to wasteful processing, and that can be strengthened over a wide range. The crankshaft includes a crank pin and a fillet portion of a journal pin. Compressive residual stress is applied to a region on the fillet portion, which extends at almost equal distances to both sides in a circumferential direction from a portion in which the greatest bending load is applied, and a processing depth for applying the compressive residual stress is gradually decreased in a circumferential direction from the center position in which the compressive residual stress is greatest.
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公开(公告)号：US20170097037A1
公开(公告)日：2017-04-06
申请号：US15285902
申请日：2016-10-05
发明人： Fabio NUMIDI , Giuliano SPERLINGA
CPC分类号： F16C3/08 , F02B75/32 , F16C3/06 , F16C7/023 , F16C2220/46 , F16C2360/22
摘要： A crankshaft for an internal combustion engine includes a shaft body having a body rotation axis, with at least one crank pin for coupling a connecting rod to the crankshaft. The crank pin is connected to the shaft body in an offset manner with respect to the body rotation axis by two crank arms. Each arm has an arm surface facing one to the other with the crank pin extending between the arm surfaces. At least one of the arm surfaces is provided with a protrusion extending from the arm surface and configured to avoid contact between the arm surface and the connecting rod.
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公开(公告)号：US09175719B2
公开(公告)日：2015-11-03
申请号：US12993860
申请日：2009-06-25
申请人： Akihiro Yoshimoto
发明人： Akihiro Yoshimoto
IPC分类号： G01C17/38 , F16C3/08 , G01M1/10 , G01M1/24 , G05B19/401 , G05B19/4097
CPC分类号： F16C3/08 , B23P2700/07 , G01M1/10 , G01M1/24 , G05B19/401 , G05B19/4097 , G05B2219/32189 , G05B2219/37205 , Y02P90/22 , Y02P90/265
摘要： A method of determining a center hole of a material crankshaft, which is obtained through molding with first and second molds, includes: obtaining first shape data of a first portion of the material crankshaft molded by the first mold and second shape data of a second portion of the material crankshaft molded by the second mold; comparing the first and second shape data respectively with first and second designed data corresponding to the first and second molds, respectively, for computing a misalignment amount of each of the first and second portions due to misalignment between the first and second molds; adjusting, based on the misalignment amount, data corresponding to the misalignment amount to reproduce actual shape data; and determining, based on the actual shape data, a position of the center hole in the material crankshaft such that a rotation balance of the material crankshaft is within a predetermined range.
摘要翻译： 一种确定通过第一和第二模具成型获得的曲轴坯料的中心孔的方法，包括：获得由第一模具模拟的曲轴的曲轴的第一部分的第一形状数据和第二部分的第二形状数据 由第二模具模制的曲轴材料; 分别比较第一和第二形状数据与第一和第二模具对应的第一和第二设计数据，以计算由于第一和第二模具之间的未对准而导致的每个第一和第二部分的不对准量; 基于所述未对准量调整与所述未对准量对应的数据，以再现实际形状数据; 并且基于实际形状数据确定曲轴坯料中的中心孔的位置，使得曲轴坯料的旋转平衡在预定范围内。
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公开(公告)号：US20150184690A1
公开(公告)日：2015-07-02
申请号：US14582338
申请日：2014-12-24
CPC分类号： F16C3/08 , F16C3/14 , F16C9/04 , F16C2360/22 , Y10T74/2174
摘要： A crankshaft for an internal combustion engine can be an integrated crankshaft in which a thrust receiving surface is formed on each of crank arm parts around the root of a crankpin in an annularly protruding manner to restrict axial movement of a connecting rod. A recessed portion is formed in each of the facing surfaces of facing crank webs at a position near a corner portion continuing from the crankpin to the crank arm part, the position being so close to the crankpin that part of the thrust receiving surface is cut away.
摘要翻译： 用于内燃机的曲轴可以是一体式曲轴，其中以环形突出的方式在曲柄销的根部周围的每个曲柄臂部分上形成止推接收表面以限制连杆的轴向运动。 在靠近曲柄销至曲柄臂部分的角部附近的位置处，在相对的曲柄腹板的每个相对表面中形成凹部，该位置与曲柄销接近，推力接收表面的一部分被切除 。
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公开(公告)号：US20140367064A1
公开(公告)日：2014-12-18
申请号：US13916763
申请日：2013-06-13
CPC分类号： B22D25/02 , B22C9/108 , B22C9/22 , F16C3/08 , F16C2220/02
摘要： A method of simultaneously manufacturing a plurality of crankshafts includes positioning a single core within a cavity of a mold having a first half and a second half together forming an exterior shape of the plurality of crankshafts. The exterior shape of each of the plurality of crankshafts produced thereby includes a plurality of pin bearing journals and a plurality of main bearing journals. The method also includes introducing via a mechanism into the cavity a molten metal to form the plurality of crankshafts. As the molten metal flows into the cavity and around the single core, a hollow section extending through at least one of the plurality of pin bearing journals and at least one of the plurality of main bearing journals of each of the plurality of crankshafts is formed. A system for simultaneously manufacturing a plurality of reduced mass crankshafts using the above method is also disclosed.
摘要翻译： 同时制造多个曲轴的方法包括将单个芯体定位在具有第一半和第二半部的模具的空腔内，形成多个曲轴的外部形状。 由此制造的多个曲轴的外形形状包括多个销轴承轴颈和多个主轴承轴颈。 该方法还包括通过机构将熔融金属引入腔中以形成多个曲轴。 当熔融金属流入空腔并围绕单个芯时，形成延伸穿过多个销轴承轴颈中的至少一个并且多个曲轴中的每一个的多个主轴承轴颈中的至少一个的中空部分。 还公开了一种使用上述方法同时制造多个减小曲轴的系统。
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公开(公告)号：US20130152731A1
公开(公告)日：2013-06-20
申请号：US13472011
申请日：2012-05-15
申请人： Dale Edward Murrish , Mark Helmle , Keith Hart , Maurice G. Meyer
发明人： Dale Edward Murrish , Mark Helmle , Keith Hart , Maurice G. Meyer
CPC分类号： B22C9/10 , F16C3/08 , F16C2220/02 , Y10T29/17 , Y10T29/49286 , Y10T29/49989 , Y10T74/2173
摘要： 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.
摘要翻译： 将曲轴铸造在模具中以限定多个销轴承轴颈和多个主轴承轴颈，每个轴承轴颈中的至少一个具有延伸穿过其中的中空部分。 单个芯位于模具内以形成所有中空部分。 单个芯可以包括限定椭圆形状的横截面，以形成具有椭圆形横截面形状的中空部分，以进一步减小曲轴的重量。 空心部分各自沿着使曲轴内的应力最小化的路径定位。 该路径可以包括相对于曲轴的纵向轴线的非线性路径或相对于纵向轴线成角度的线性路径，以将中空部分弯曲或引导远离曲轴的高应力区域。 芯的非圆形横截面可围绕其自身的轴线旋转以最大限度地减少质量。
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