Advances and Trends on Tube Bending Forming Technologies
نویسندگان
چکیده
منابع مشابه
Advances in Sheet Metal Forming Technologies
In the article the changes associated with construction of machines used in die and die-less sheet metal forming have been presented. The selected future directions of development in new technologies and machines for sheet metal forming taking into account modern blank holding systems in the process of deep drawing have been indicated. Also the tendencies in introduction of new technologies and...
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Laser tube bending is a flexible forming process. Two irradiation methods of axial and circumferential scanning are generally used to form metal tubes. The two most important disadvantages of circumferential scanning are its lower bending angle and the time interval required between each scan for cooling purpose. In this research, a novel cooling strategy during laser tube bending with circumfe...
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최근 스마트폰 사용자의 폭발적 증가에 따른 모바일 인터 넷 서비스 및 멀티미디어에 대한 급격한 수요 증가로 인해 기 존 3G 망이 포화 상태에 이르게 되었고, 이러한 수요를 만족 시키기 위해 4세대 이동 통신 시스템인 LTE (Long-term evolution) 서비스가 개시되었다. 더불어, 현재 LTE 보다 개 선된 LTE-Advanced 시스템에 대한 연구, 표준화, 개발이 활 발히 진행 중에 있다 [1]. LTE-Advanced의 요구 성능은 하향 링크와 상향 링크에서 최대 데이터 전송 속도가 각각 1Gbps와 500Mbps이며, 주파수 전송 효율 역시 하향 링크에서 최대 30 bps/Hz에 이른다. 이와 같이 매우 높은 데이터 전송률과 주파 수 효율을 얻기 위해, LTE-Advanced에 채택...
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Thin-walled tube bending has common applications in the automobile and aerospace industries. The rotary-draw-bending method is a complex physical process with multi-factor interactive effects and is one of the advanced tube forming processes with high efficiency, high forming precision, low consumption and good flexibility for bending angle changes. However, it may cause a wrinkling phenomenon,...
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This research presents a new flexible bending machine and its practical applications. The proposed machine uses a new method. When tubes are fed into the fixed and mobile dies, they are bent by shifting the relative position of the mobile die. The bending radius is controlled by the relative distance and orientation between the mobile die and the tube. The bending angle is controlled by the len...
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ژورنال
عنوان ژورنال: Chinese Journal of Aeronautics
سال: 2012
ISSN: 1000-9361
DOI: 10.1016/s1000-9361(11)60356-7