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热模锻压力机离合器制动器摩擦过热的控制措施
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作者 田明 《中国金属通报》 2019年第8期134-135,共2页
在汽车零部件锻造加工之中,热模锻压力机有着至关重要的作用。而离合器制动器又是热模锻压力机最为重要的一个部分,它对于热模锻压力机的使用有着关键性的影响作用。在应用热模锻压力机进行汽车零部件锻造加工的过程中,离合器制动器一... 在汽车零部件锻造加工之中,热模锻压力机有着至关重要的作用。而离合器制动器又是热模锻压力机最为重要的一个部分,它对于热模锻压力机的使用有着关键性的影响作用。在应用热模锻压力机进行汽车零部件锻造加工的过程中,离合器制动器一直都处于摩擦的状态之中,这就使其使用的寿命由于摩擦过热而受到严重的不利影响。基于这一情况,本文对离合器制动器摩擦过热的控制措施进行分析,希望可以对离合器制动器使用寿命的保障、热模锻压力机的正常运行提供一定的帮助。 展开更多
关键词 汽车零部件锻造加工 热模锻压力机 离合器制动器 摩擦过热 控制措施
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Visualization and simulation of plastic material flow in friction stir welding of 2024 aluminium alloy plates 被引量:12
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作者 武传松 张文斌 +1 位作者 石磊 陈茂爱 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第6期1445-1451,共7页
Thin copper sheets as marker material were embedded into weld path of 2024 aluminium alloy plates and their final position after friction stir welding was examined by metallographic techniques. Referring to the visual... Thin copper sheets as marker material were embedded into weld path of 2024 aluminium alloy plates and their final position after friction stir welding was examined by metallographic techniques. Referring to the visualized material flow patterns, a three-dimensional model was developed to conduct the numerical simulation of the temperature profile and plastic material flow in friction stir welding. The calculated velocity contour of plastic flow in close proximity of the tool is generally consistent with the visualized results. As the tool rotation speed increases at a constant tool travel speed, the material flow near the pin gets stronger. The predicted shape and size of the weld nugget zone match with the experimentally measured ones. 展开更多
关键词 2024 aluminium alloy numerical simulation VISUALIZATION friction stir welding material flow heat transfer
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