Abstract:
본 발명은 자동 변속기의 유성기어용 캐리어에 관한 것으로, 중앙의 내주면에 스플라인이 형성된 보스부와, 이 보스부와 함께 결합되어 피니언을 지지하게 되는 플랜지부로 이루어진 캐리어에 있어서, 상기 보스부에서 스플라인이 형성된 중앙부분을 제외한 나머지 부분이 원판형상으로 되어 있으면서 상기 플랜지부의 상면에는 다수개의 브릿지가 등간격으로 설치되어 있고, 상기 보스부의 하면이 상기 플랜지부의 브릿지 상부면에 브레이징 접합되어 서로 이웃하는 상기 브릿지 사이의 공간이 피니언 설치공간이 되도록 한 것에 그 특징이 있다. 이러한 본 발명의 유성기어용 캐리어 구조에서는 소결성형 및 브레이징 접합 적용시 종래의 컵형상 성형을 위한 딥 드로잉 및 보스부와 플랜지부의 결합을 위한 전자 빔 용접 등 값비싼 공정을 대체하여 원가 절감의 효과를 기대할 수 있으며, 용접부 구조 개선을 통해 기존 전자 빔 용접시의 변형 문제를 해소할 수 있는 장점이 있게 된다.
Abstract:
PURPOSE: A carrier for a planetary gear of an automatic transmission is provided to cut down the cost by alternating a deep drawing process for molding an existing cup shape and an electron beam welding process for combining a boss unit and a flange unit. CONSTITUTION: A carrier(100) for a planetary gear of an automatic transmission is composed of a boss unit(110) formed with a spline(112) on the center inner peripheral surface and a flange unit(120) combined together with the boss unit to support a pinion. The rest part of the boss unit except for the center portion at which the spline is formed is shaped like a disc. Plural bridges(124) are mounted on the upside of the flange unit at regular intervals. An underside of the boss unit is brazing-welded on the upside of the bridge of the flange unit to make a space between the bridges as a pinion mounting space.
Abstract:
PURPOSE: A steel base sintering alloy having high wear-resistance for valve seat of engine, a manufacturing method thereof and a valve seat of engine are provided to maximumly reduce the abrasion of product by having a good wear resistance and improve the self-wear resistance. CONSTITUTION: A steel base sintering alloy having high wear-resistance for valve seat of engine and a valve seat of engine comprise the iron is a main component. The carbon 0.6~1.2wt%, nickel 1.0~3.0wt%, cobalt 15.0~25.0wt%, chrome 3.0~9.0wt%, molybdenum 8.0~15.0wt%, tungsten 1.0~4.0wt%, manganese 0.5~2.0wt%, calcium 0.1~0.5wt%. The base tissue is mixed with chrome 0.8~1.2wt%, molybdenum 0.4~0.6wt%, manganese 0.5~0.9wt%, carbon 1.0~1.4wt% and remnant is mixed with the alloy portion, carbon 0.2~0.3wt%, nickel 1.0~3.0wt%, cobalt 1.0~3.0wt% this consisting of the iron.
Abstract:
PURPOSE: A method of manufacturing sintered gear for transmission, which can reduce manufacturing costs by minimizing post processes is provided to increase the density of the sintered gear and to improve strength. CONSTITUTION: A method of manufacturing sintered gear for transmission comprises the next step. Carbon(C) 0.2 ~ 0.3 wt% is mixed in alloyed powder consisting of chrome(Cr) 1.3 ~ 1.7 wt%, molybdenum(Mo) 0.15 ~ 0.30 wt% and remainder iron(Fe). The pressure is added in the mixed powder and tooth form is given to the mixed powder. The molded materials are sintered in 1200 ~ 1300°C. The sintered materials(1) are rolled between two rolling dies(3,5) in room temperature. The rolled materials are heat-treated.