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公开(公告)号：US20210331744A1
公开(公告)日：2021-10-28
申请号：US17279788
申请日：2019-09-24
发明人： Yukihiko KIMURA , Kunihiro YABUNO , Keigo MINATANI , Sam Soo HWANG , Kenji TAMURA , Hiroshi NOGAMI , Koichiro ISHIHARA
IPC分类号： B62D21/11
摘要： A support beam includes a first supporting portion, a second supporting portion, and an arm connecting the first supporting portion to the second supporting portion. The arm includes a web and a flange. The flange includes a first end, a second end, and a center portion. The center portion of the flange is connected to an end of the web. The flange includes bent portions at which the center line of the thickness of the flange is bent outward in the extending direction of the web in the region between the first end and the second end in a transverse cross section of the arm.
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公开(公告)号：US20200023427A1
公开(公告)日：2020-01-23
申请号：US16498127
申请日：2018-04-03
发明人： Kenji TAMURA , Kenji IMANISHI , Sam Soo HWANG , Kunihiro YABUNO , Kunihiro YOSHIDA , Koichiro ISHIHARA
摘要： The production method includes a first step, a second step and a third step. In the first step, a steel material is forged by dies, whereby a forged product including a rough web part and four plate-shaped rough flange parts is produced. In the second step, at least one specified rough flange part, which is at least one of the four rough flange parts, is pressed by a first die, whereby a first bent portion bending outward in an up-down direction is formed in the specified rough flange part. In the third step, the edge of the first bent portion is pressed by a second die inward in the up-down direction, whereby the edge is deformed and a second bent portion is formed. In the third step, the edge of the specified flange part is deformed while the edge is kept from deforming in a front-rear direction.
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公开(公告)号：US20190389251A1
公开(公告)日：2019-12-26
申请号：US16488329
申请日：2018-03-02
发明人： Kenji IMANISHI , Kunihiro YABUNO , Kunihiro YOSHIDA , Sam Soo HWANG , Kenji TAMURA , Koichiro ISHIHARA
摘要： A disclosed front axle beam includes a beam section. The beam section includes a first flange part, a second flange part, and a web section connecting the first flange part and the second flange part. The web section includes a varying-slope section that includes a plurality of first slope sections and a plurality of second slope sections. Each of the plurality of first slope sections inclines in one direction with respect to the vehicle-height direction in a cross section perpendicular to the longitudinal direction. Each of the plurality of second slope sections inclines in the opposite direction to the one direction with respect to the vehicle-height direction in a cross section perpendicular to the longitudinal direction. The first slope section and the second slope section are located in an alternate manner along the longitudinal direction. In this way, the rigidity of the front axle beam can be increased.
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公开(公告)号：US20210187591A1
公开(公告)日：2021-06-24
申请号：US16640131
申请日：2018-07-30
发明人： Junichi OKUBO , Kenji TAMURA , Kunihiro YOSHIDA , Sam Soo HWANG , Ryusuke NAKANO , Masao HORI , Yukihiro OTA
摘要： Provided is a production method, including a first preforming process for obtaining a first preform from a billet, a second preforming process for obtaining a final preform from the first preform, and a finish forging process for forming the final preform into a finishing dimension of a forged crankshaft. In the first preforming process, a plurality of flat parts are formed by pressing pin-corresponding parts and journal-corresponding parts in a direction perpendicular to an axial direction of the billet. The second preforming process includes: a process of pressing regions to be a plurality of journals with a width direction of the flat part as a pressing direction by using a pair of first dies; and a process of, after starting pressing by the first dies, decentering regions to be a plurality of pins with the width direction of the flat part as a decentering direction by using second dies.
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公开(公告)号：US20200086378A1
公开(公告)日：2020-03-19
申请号：US16470002
申请日：2017-10-17
发明人： Kenji TAMURA , Junichi OKUBO , Kenji IMANISHI , Kunihiro YABUNO , Sam Soo HWANG , Sho TAKAMOTO , Tadanao ISHII , Koichiro ISHIHARA
摘要： A production method includes a forging step, a flash-trimming step, and a pressing step. In the forging step, a finish-forged product with flash is formed by an upper forging, die and a lower forging die. In the forging step, an excess portion is formed on at least one crankarm which is connected to a first or third pin, in a portion near the first or third pin, on an outer periphery of a lateral part near the upper forging die, such that the excess portion protrudes from the outer periphery. In the pressing step, the excess portion is pressed by an upper die such that the excess portion bulges toward a journal. This method allows production of a forged crankshaft with a reduced weight and a sufficient rigidity in a simple facility.
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公开(公告)号：US20200039291A1
公开(公告)日：2020-02-06
申请号：US16499454
申请日：2018-04-03
发明人： Kenji TAMURA , Kenji IMANISHI , Sam Soo HWANG , Kunihiro YABUNO , Kunihiro YOSHIDA , Koichiro ISHIHARA
摘要： The production method disclosed is a method for producing a front axle beam. The production method includes a die forging step and a bending step. The die forging step is a step of forging a steel material with dies to produce a forged product including a rough web part, which is to be formed into a web part, and four plate-shaped rough flange parts protruding frontward and rearward from an upper side and a lower side of the rough web part, respectively. The bending step is a step of pressing at least one specified rough flange part, which is at least one of the four rough flange parts, with a first die to form a bent portion in the specified rough flange part such that the bent portion is bent inward in an up-down direction of the forged product.
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公开(公告)号：US20210040984A1
公开(公告)日：2021-02-11
申请号：US16965128
申请日：2019-01-17
IPC分类号： F16C3/08
摘要： A crankshaft includes a plurality of journals, a plurality of pins, and a plurality of crank arms. The journals are coaxially disposed with the rotational center of the crankshaft. The pins are decentered with respect to the journals. Each of the crank arms is disposed between one journal and one pin to join the one journal with the one pin. One or more of the crank arms integrally include a counterweight. The counterweight includes two side surfaces. The side surfaces are each provided with a quenched layer.
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公开(公告)号：US20200370593A1
公开(公告)日：2020-11-26
申请号：US16965208
申请日：2019-01-17
IPC分类号： F16C3/08
摘要： A crankshaft includes a plurality of journals, a plurality of pins, and a plurality of crank arms. The journals are coaxially disposed with the rotational center of the crankshaft. The pins are decentered with respect to the journals. Each of the crank arms is disposed between one journal and one pin to join the one journal with the one pin. One or more of the crank arms integrally include a counterweight. The counterweight includes two side surfaces. An added layer of a material different from that of a crankshaft body is provided on each of side surfaces of the counterweight. When the Young's modulus of the added layer is E and the Young's modulus of the material of the crankshaft body is E0, E/E0 is 0.2 to 0.4.
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公开(公告)号：US20200023424A1
公开(公告)日：2020-01-23
申请号：US16498168
申请日：2018-04-03
发明人： Kenji TAMURA , Kenji IMANISHI , Sam Soo HWANG , Kunihiro YABUNO , Kunihiro YOSHIDA , Koichiro ISHIHARA
摘要： In a pressing step, a first forged product is pressed by a first die, and thereby, a second forged product including a rough flange having a thickness-changing portion is produced. The thickness-changing portion includes a front part protruding frontward from a side of a rough web part and a rear part protruding rearward from the side of the rough web part. Each of the front part and the rear part includes a first part, and a second part that is thicker than the first part and is located farther from the rough web part than the first part. In the pressing step, at least a part of the rough flange that is above or below the web part (thick part) is pressed by the first die, whereby the material of the first forged product in the part is caused to flow frontward and rearward, and the thickness-changing portion is formed.
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