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在金属塑性成形工艺中,掌握金属流动的规律,对工艺设计与实践都具有十分重要的意义。所谓流动规律,不仅仅指金属流动时的难易程度,而且还包括以边界为几何约束的金属整体随着变形的进行,其流动方向和流动量大小的变化。根据这一理论设计锻造工艺中预、终锻模腔的形状,可以使金属更容易充满型腔,并计算最合理的毛坯尺寸,以及选择最适宜的模具参数,使材料向着预期的方向流动。从而,也可用以分析一些工艺质量问题,如充不满、塌
In metal plastic forming process, to grasp the law of metal flow, process design and practice are of great significance. The so-called flow law, not only refers to the ease of metal flow, but also includes the geometry of the boundary geometry as a whole with deformation, the flow direction and flow size changes. According to this theory, the shape of the forging die in the forging process can be designed to make it easier for the metal to fill the cavity, to calculate the most reasonable blank size, and to select the most suitable die parameters to make the material flow in the expected direction. Thus, can also be used to analyze some of the quality problems, such as filling dissatisfaction, collapse