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公开(公告)号：US11648611B2
公开(公告)日：2023-05-16
申请号：US16641920
申请日：2018-09-20
申请人： Diamet Corporation
发明人： Yoshinari Ishii , Tsuneo Maruyama
CPC分类号： B22F3/1035 , B22F5/00 , C22C1/0475 , C22C33/0278 , C22C38/16 , B22F1/052 , B22F2005/004 , C22C38/008
摘要： Provided is a novel sintered oil-impregnated bearing superior in wear resistance and cost performance under a severe use condition where the bearing collides with a shaft due to a high load and vibration, such as a condition associated with an output shaft of an electric motor installed in a vehicle and a wiper motor installed therein. The sintered oil-impregnated bearing contains: 15 to 30% by mass of Cu; 1 to 4% by mass of C; and a remainder consisting of Fe and inevitable impurities, in which a metal structure with copper being melted therein is provided at least on a bearing surface; pearlite or a pearlite with ferrite being partially scattered therein is provided in a matrix; a copper-rich phase arranged in a mesh-like manner is also provided in the matrix; and a free graphite is dispersed and distributed in the matrix as well.
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公开(公告)号：US20220001446A1
公开(公告)日：2022-01-06
申请号：US17432782
申请日：2020-02-21
申请人： DIAMET CORPORATION
发明人： Tsuneo Maruyama , Shinichi Takezoe , Hideo Sakai
摘要： A sintered component forming step is for forming a sintered component by powder molding. An insert forming step is for forming a sintered insert component in which an exterior component is integrated on an outer peripheral portion of the sintered component. One or more grooves or ridges are formed on an outer peripheral portion of a region except for one end portion of the sintered component in the sintered component forming step. The insert forming step includes a step for bringing the outer peripheral portion of the end portion into contact with an inner peripheral surface of an insert forming mold along a circumferential direction and covering the one or more grooves or ridges by the insert forming mold with an interval to form a cavity on an outer peripheral portion of the sintered component and a step for filling a melted material in the cavity.
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公开(公告)号：US20210131494A1
公开(公告)日：2021-05-06
申请号：US16492520
申请日：2018-06-28
申请人： DIAMET CORPORATION
发明人： Tsuneo MARUYAMA , Yoshinari ISHII
摘要： Provided is a bearing for a motor-type fuel injection pump. This bearing is composed of a Cu—Ni-based sintered alloy, inexpensive and has a superior corrosion resistance and abrasion resistance. The bearing contains 10 to 20% by mass of Ni, 2 to 4.5% by mass of Sn, 0.05 to 0.4% by mass of P, 2 to 7% by mass of C, and a remainder consisting of Cu and inevitable impurities. The bearing has a metal structure where Sn is uniformly dispersed and distributed in a metal matrix, and has a porosity of 7 to 17% where a free graphite is dispersed and distributed in pores.
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公开(公告)号：US20200180032A1
公开(公告)日：2020-06-11
申请号：US16641920
申请日：2018-09-20
申请人： Diamet Corporation
发明人： Yoshinari ISHII , Tsuneo MARUYAMA
摘要： Provided is a novel sintered oil-impregnated bearing superior in wear resistance and cost performance under a severe use condition where the bearing collides with a shaft due to a high load and vibration, such as a condition associated with an output shaft of an electric motor installed in a vehicle and a wiper motor installed therein. The sintered oil-impregnated bearing contains: 15 to 30% by mass of Cu; 1 to 4% by mass of C; and a remainder consisting of Fe and inevitable impurities, in which a metal structure with copper being melted therein is provided at least on a bearing surface; pearlite or a pearlite with ferrite being partially scattered therein is provided in a matrix; a copper-rich phase arranged in a mesh-like manner is also provided in the matrix; and a free graphite is dispersed and distributed in the matrix as well.
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公开(公告)号：US20200016662A1
公开(公告)日：2020-01-16
申请号：US16335532
申请日：2017-10-26
申请人： Diamet Corporation
发明人： Yoshiki TAMURA , Shinichi TAKEZOE
摘要： An oil-impregnated sintered bearing in which a Fe—Cu-based sintered body is impregnated with a lubricant and which has a bearing hole that is configured to support a rotary shaft inserted therethrough, in which an inner circumferential surface of the bearing hole includes at least a first region including a central portion in a shaft direction and a second region forming a portion from a first end portion of the first region to a first opening of the bearing hole, and, in a friction surface of the second region, an area of a Fe phase is larger and an area of a Cu phase formed of Cu powder including Cu-based flat raw material powder is smaller than those in a friction surface of the first region.
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公开(公告)号：US10018196B2
公开(公告)日：2018-07-10
申请号：US15106090
申请日：2015-01-07
申请人： Diamet Corporation
发明人： Naotaka Honda
CPC分类号： F04C2/102 , F04C2/084 , F04C2/10 , F04C15/0073 , F04C15/0076 , F04C18/10 , F04C2230/10 , F04C2240/20
摘要： A novel rotating body, its material, and manufacturing method thereof, shortening a distance for cutting a bore surface in its axial direction, reducing processing costs, enabling lower-cost manufacture of inner rotor. A metallic rotating body 11 has a bore surface 12 for press-fitting a shaft thereinto, including a cutting-processed portion 13 at first end and an unprocessed portion 14 at second end. The processed portion 13 has an inner diameter formed smaller than the unprocessed portion 14. A chamfer 15 at first end of the bore surface 12 is cut, while a chamfer 6 at the second end not. A bore surface 2 of material 1 processed into the rotating body 11 includes a small-diameter portion 3 at first end and a large-diameter portion 4 at second end. A step 5 is formed between the small- and large-diameter portions 3, 4, with the chamfer 6 formed at second end.
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7.发明申请ROTATING BODY, ROTATING BODY MATERIAL, AND METHOD OF MANUFACTURING ROTATING BODY 有权旋转体，旋转体材料和制造旋转体的方法公开(公告)号：US20170002809A1
公开(公告)日：2017-01-05
申请号：US15106090
申请日：2014-01-07
申请人： Diamet Corporation
发明人： Naotaka HONDA
CPC分类号： F04C2/102 , F04C2/084 , F04C2/10 , F04C15/0073 , F04C15/0076 , F04C18/10 , F04C2230/10 , F04C2240/20
摘要： A novel rotating body, its material, and manufacturing method thereof, shortening a distance for cutting a bore surface in its axial direction, reducing processing costs, enabling lower-cost manufacture of inner rotor. A metallic rotating body 11 has a bore surface 12 for press-fitting a shaft thereinto, including a cutting-processed portion 13 at first end and an unprocessed portion 14 at second end. The processed portion 13 has an inner diameter formed smaller than the unprocessed portion 14. A chamfer 15 at first end of the bore surface 12 is cut, while a chamfer 6 at the second end not. A bore surface 2 of material 1 processed into the rotating body 11 includes a small-diameter portion 3 at first end and a large-diameter portion 4 at second end. A step 5 is formed between the small- and large-diameter portions 3, 4, with the chamfer 6 formed at second end.
摘要翻译： 一种新颖的旋转体及其材料及其制造方法，缩短了在轴向上切割孔表面的距离，降低了加工成本，能够实现内转子的低成本制造。 金属旋转体11具有用于将轴压入其中的孔表面12，包括在第一端处的切割处理部分13和在第二端处的未处理部分14。 处理部分13具有比未加工部分14小的内径。在孔表面12的第一端处的倒角15被切割，而在第二端处的倒角6不被切割。 加工成旋转体11的材料1的孔表面2包括第一端的小直径部分3和第二端部的大直径部分4。 在小直径部分3,4和大直径部分4之间形成有台阶5，倒角6形成在第二端。
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公开(公告)号：US20230311381A1
公开(公告)日：2023-10-05
申请号：US18330063
申请日：2023-06-06
申请人： DIAMET CORPORATION
发明人： Shinichi Takezoe , Tsuneo Maruyama , Hideo Sakai
CPC分类号： B29C45/1459 , B22F7/08 , B29C45/14065 , B29C45/26 , B29C45/2616 , F16C33/145 , B22F5/10 , B29K2705/00
摘要： By using a forming die having a fixed die and a movable die moving along a parting surface on the fixed die and by moving the movable die along the parting surface, to press and hold a sintered part between the movable die and the fixed die, to form a cavity around the sintered part except parts which abut on the fixed die and the movable die by the forming die, and to fill the cavity with melted material which becomes an exterior part, so that the sintered part and the exterior part are integrated by insert molding.
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公开(公告)号：US20230002858A1
公开(公告)日：2023-01-05
申请号：US17783096
申请日：2020-12-11
申请人： Diamet Corporation
发明人： Yoshinari ISHII
摘要： A method for manufacturing a Cu—Ni—Al-based sintered alloy according to the present invention includes: adding pure Al powder to alloy powder containing Cu, Ni, and Al and mixing them to produce raw material powder with a composition ratio of Ni: 1% to 15% by mass, Al: 1.9% to 12% by mass, and a Cu balance containing inevitable impurities; compacting the raw material powder to form a green compact; and sintering the green compact in a mixture gas atmosphere of hydrogen gas and nitrogen gas that contains 3% by volume or more of hydrogen gas.
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公开(公告)号：US11073178B2
公开(公告)日：2021-07-27
申请号：US16472660
申请日：2017-12-20
发明人： Hajime Kouno , Yoshinari Ishii , Tsuneo Maruyama , Jyun Katou , Kenji Orito
摘要： An oil-impregnated sintered bearing comprises a bearing hole. In the bearing, sliding surfaces supporting an outer circumferential surface of a shaft and an oil supply surface whose diameter is larger than that of the sliding surfaces are formed on an inner circumferential surface of the bearing hole into which the shaft is inserted. The sliding surfaces and the oil supply surfaces are adjacent to each other in the axial direction of the bearing hole. A height gap “d1” between the sliding surfaces and the oil supply surface is not less than 0.01% and not more than 15% of an inner diameter of the sliding surfaces. A surface opening percentage of the sliding surfaces is not higher than 10%. A surface opening percentage of the oil supply surface is higher than 10%. An average circle-equivalent diameter of opening parts of pores on the sliding surfaces is not larger than 20 μm.
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