论文部分内容阅读
目前我国大型锻压设备少,锻钢件肥头大耳,金属材料利用率低,机械加工工序多、工时长,是飞机生产中的一个薄弱环节。采用精密铸造方法,生产飞机某些重要受力构件,是精化毛坯的一个重要途径,具有十分显著的经济效果。 飞机的某些受力构件能否精铸?这些精铸件的疲劳寿命能否接近、达到或超过锻件的水平?这对我们提出了一个崭新的课题,它促使我们进行了一系列试验研究工作。 一、国内外的发展概况 长期以来,不少国家都在积极研究飞机受力构件的精铸技术。早在1939～1945年,德国歼击机的尾轮叉和主起落架短轴就试验过铸件。1959年苏联报导了用铸造起落架支柱外筒
At present, there are few large-scale forging equipment in our country, forged steel and big ears, low utilization rate of metal materials, many machining processes and long working hours, which is a weak link in aircraft production. The use of precision casting method, the production of some important aircraft components, is an important way to refine the rough, with a very significant economic effect. Can some of the aircraft’s force components be cast? Whether the fatigue life of these castings can approach or surpass the level of forgings? This presents us with a brand new topic that has led us to conduct a series of experimental studies. First, the development overview at home and abroad For a long time, many countries are actively studying the casting technology of aircraft components. As early as 1939 ~ 1945, the German fighter tail fork and the main landing gear on the minor axis of the test castings. In 1959 the Soviet Union reported the casting of the landing gear strut outer cylinder